JPH10292317A - Installation method and device of bridge girder member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the economic efficiency of a cantilever-form overhanging installation method. SOLUTION: A traveling girder 2 is arranged on an existing overhung bridge- girder 6 and an installation work truck 3 is mounted thereon to hang bridge girder members 7 by a hoist of the installation work truck 3, below the bridge girder 6 and transfer the hoisted bridge girder members 7 to the front end of the bridge girder along the bridge girder 6, below the girder, by transferring the traveling girder 2 mounting the installation work truck 3. An erection girder 4 of the traveling girder 2 is extended forward from the front end of the bridge girder 6 and the truck 3 is transferred to the extended direction side of the erection girder 4 and then, the bridge girder members 7 are lifted by the hoist of the truck 3 to connect the bridge girder members to the front end of the bridge girder 6 and install it so as to shape a cantilever-form overhung girder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for erection of a bridge girder member suitable for use in constructing a bridge, and more particularly to an erection method in which a bridge girder member is transported under a girder and cantilevered. The present invention relates to a method and an erection device that can be used for the method.

[0002]

2. Description of the Related Art When constructing a bridge, a bridge girder member being erected is erroneously installed at the sea or in a mountain area or there is a problem with a work site. If the vent cannot be supported,
A delivery method, a cable crane method, a collective erection method, a cantilever erection method, and the like are performed.

[0003] Here, the delivery method is a method in which a bridge girder member is sent out from a location where both ends or one end of a bridge to be installed is located, and the cable crane method is used between the locations where both ends of the bridge are located. In this method, a bridge girder member is lifted and erected using a bridged cable crane.In these methods, a work site for installing erection equipment and carrying members is installed at locations at both ends or one end of the bridge to be erected. Need to secure. However, when constructing a bridge in a mountainous area, the location where the bridge end is located is a steep slope, a tunnel or cut soil is adjacent to the location where the bridge end is located, or the bridge end is located. In some cases, it is difficult to secure a work site required for the erection under such conditions. Also, even if a work site can be secured, it is necessary to consider the construction time and facilities in consideration of the situation of the adjacent construction section when constructing.

[0004] In addition, the collective erection method is a method of collectively erection of a bridge body assembled at another place. The bridge erected by using a large work site adjacent to the erection point is large. There is a method of erection with a crane, and a method of erection of a bridge assembled on the ground or a barge using a floating crane when it is installed on the sea or a river. Land and wide water area are required.

[0005] The cantilever erection method is a method in which a bridge girder member is connected to an already erected bridge girder and the cantilever is erected, and the bridge girder already erected is used as a counterweight. There are a method of connecting a bridge girder member to the tip of the portion and a method of connecting bridge girder members one after another while connecting and balancing the bridge girder members on the left and right sides of a central pier.

As the erection equipment for the cantilever erection method, a traveler crane having a swing arm type crane mounted on a bogie is generally used (Showa 49).
(See page 1288 of “New Edition of Civil Engineering Handbook”, edited by the Japan Society of Civil Engineers, published on November 1, 2006), transport the bridge girder by barge, etc. on the sea or river and stop it directly below the erection position. In some cases, it may be necessary to suspend the bridge directly from the traveler crane.However, if it is difficult to suspend the bridge directly below due to water flow, etc., the bridge girder members transported to the work yard near the bridge pier must be installed. On a bridge girder part, it is picked up by crane equipment such as a tower crane with a lifting height exceeding the height of the pier, and the bridge girder member is transported by a bogie to the erection position of the tip of the overhang part on the bridge girder part, and it is used for a traveler crane. Handing over.

However, when such a conventional erection technique is used for cantilever erection using only the work yard near the pier, the traveler crane has a high center of gravity and is unstable. If it is left unbalanced, it is difficult to move at high speed on the bridge girder, and a member carrier for transporting the bridge girder on the bridge girder and delivering it to the traveler crane is required. Restricted by the relationship with the carrier truck, two traveler cranes are needed to install the bridge girder members at the ends of the left and right overhangs of the bridge girder across the central pier, and in addition, A large number of erection equipment, such as crane equipment for picking up the bridge girder members on the installed bridge girder and delivering it to the above-mentioned member carrier, is required. From, there has been a problem in the economy.

Conventionally, as another construction equipment for the cantilever erection method, a jack-equipped wheel and a vent are fixed to the lower surface at one end of an erection girder (erection girder) having a track on the upper surface. A traveling girder (movable erection girder) and an erection work vehicle in which a winch is provided on a trolley running on the track are sometimes used. Examples of such cases include, for example, Kasaoka City in Okayama Prefecture and Kamishima It is known that when the Kamijima Bridge, a three-span continuous PC girder bridge was constructed on a prefectural road connecting to the prefectural road, it was used for the construction of the bridge girder (Nippon Road, February 20, 1994) (See pages 446-447 in the Concrete Road Bridge Design Handbook published by the Association).

In the erection method using the traveling girder and the erection work vehicle, the track is provided on the bridge girder because the step between the upper surface of the bridge girder already installed and the upper surface of the traveling girder is relatively large. So that the work vehicle carrier can travel from the vicinity of the pier to the position at the rear end of the traveling girder, and the work vehicle can be delivered between the work vehicle carrier and the traveling girder. The bridge girder member transported to the work yard of (1) is lifted to the position below the girder by the winch of the construction work vehicle that has been moved onto the work vehicle carriage on the bridge girder part, and then the construction work vehicle keeps the bridge girder member lifted. In this state, move the work vehicle carrier to the rear end of the traveling girder along with the work vehicle on which it was mounted, and place the work vehicle on the work vehicle carrier. Transferred onto Luo traveling girder,
After moving the construction work vehicle to a predetermined construction place on the traveling girder, the bridge girder member is further lifted to the construction position by a winch of the construction work vehicle.

However, even in the method using the traveling girder and the erection work vehicle, when the cantilever erection is performed using only the work yard near the pier, the work vehicle carrier is required as described above. Therefore, the location of the traveling girder on the bridge girder is restricted due to its relationship with the work vehicle carrier, so extend the bridge girder members at the ends of the left and right overhangs of the bridge girder with the central pier sandwiched between them. Two traveling girders whose directions are opposite to each other are required, and there is a problem in economical efficiency because many other erection equipment are required. For this reason, the delivery method and the cable crane method have conventionally been adopted from the viewpoint of economic efficiency despite the above-mentioned restrictions.

[0011]

SUMMARY OF THE INVENTION The present invention provides a method and an apparatus for erection of a bridge girder member which advantageously solves the problems of the above-mentioned conventional cantilever erection method. According to a method of erection of a bridge girder member according to the present invention, an erection girder and a bogie traveling on the bridge girder supporting the erection girder such that the support position can be changed are provided on the bridge girder part that has already been erected. Along with disposing the traveling girder comprising, the construction work device having a lifting device for lifting the bridge girder member to be erected and moving on the erection girder of the traveling girder is mounted on the erection girder, The position where the erection girder is supported by the traveling girder cart is determined by the erection girder. Of the bridge girder member, and a part opposite to the hand-drawing direction side for erection of the bridge girder member, and the erection work device is vertically positioned on the erection girder with the trolley of the traveling girder with the erection girder interposed therebetween. The traveling girder is arranged at a position near a pier on the bridge girder part that has already been erected, and then, near the pier, the lifting girder of the erection work device is used to remove the bridge girder member. ,
While lifting below the bridge girder part that has already been erected and erected, the traveling girder equipped with the erection work device is moved by its bogie, and the bridge girder member in a state of being lifted by a lifting machine of the erection work device, Transporting along the bridge girder part to the tip of the bridge girder part under the bridge girder part that has already been erected,
In addition, the hand extending direction side portion of the erection girder is extended forward from the tip of the bridge girder portion that has already been erected, and then the traveling girder is connected to the bridge girder portion that has already been erected and lifted. After stopping, the erection work device is moved onto the hand extending direction side portion of the erection girder, and then the lifting device of the erection girder lifts the suspended bridge girder member to a predetermined height. Projecting the bridge girder member to the tip of the bridge girder part that has already been erected, and then releasing the connection between the traveling girder and the bridge girder part that has already been erected, The support position of the erection girder by the trolley of the girder is determined by the erection girder. Together with change in the center, the erection work device on the erection girder is moved in a state aligned vertically with carriage of the traveling girders in between the erection girders, then
The traveling girder on which the erection work device is mounted is moved by the bogie to return the traveling girder to a position near a pier on the bridge girder part that has already been erected.

According to a second aspect of the present invention, there is provided a method for erection of a bridge girder member according to the present invention, wherein a bogie traveling on the bridge girder part, and an erection girder fixed on the bogie, are provided on a bridge girder part that has already been erected. A traveling girder comprising a traveling girder comprising a lifting device for lifting a bridge girder member to be erected, and an erection work device moving on an erection girder of the traveling girder being mounted on the erection girder, The erection work device is placed on the erection girder and vertically aligned with the truck of the traveling girder with the erection girder interposed therebetween, and the traveling girder is pierced on the bridge girder part that has already been extended. Near the pier, and then near the pier, The lifting machine, said bridge beam member, with lift below the bridge girder portions have already overhanging erection, the traveling girder equipped with the erection work device, is moved by the carriage,
The bridge girder member in a state of being lifted by the lifting machine of the erection work device is transported along the bridge girder portion to a tip of the bridge girder portion below the bridge girder portion that has already been overhanging and erected, and After extending the hand extending direction side part forward from the tip of the bridge girder part that has already been erected, then connecting the traveling girder to the bridge girder part that has already been erected, Moving the erection work device onto the hand-extending direction side portion of the erection girder,
Next, by the lifting machine of the erection work device, the bridge girder member in the lifted state is pulled up to a predetermined height,
The bridge girder member is overhanged to the tip of the bridge girder portion that has already been erected, and then the connection between the traveling girder and the bridge girder portion that has been erected is released. On the erection girder, move the device to a state in which the erection girder is interposed vertically with the trolley of the traveling girder, and then move the traveling girder equipped with the erection work device by the trolley. And returning to a position near the pier on the bridge girder part that has already been erected.

According to a third aspect of the present invention, there is provided a bridge girder member erection method according to the present invention, wherein a bogie traveling on the bridge girder part and an erection girder fixed on the bogie part are provided on a bridge girder part which has already been erected. And a traveling girder having a counterweight movable along the direction in which the erection girder extends, and a lifting device for lifting the bridge girder member to be erected, the traveling girder moving on the erection girder. The erection girder is mounted on the erection girder, and the erection girder is first placed on the erection girder such that the erection girder is sandwiched between the erection girder and the bogie of the traveling girder. With the traveling girder. In a state of being vertically aligned with the bogie, the traveling girder is arranged at a position near the pier on the bridge girder part that has already been erected, and then, near the pier, by the lifting machine of the erection work device, A state in which the bridge girder member is lifted below the bridge girder part that has already been erected and erected, and the traveling girder on which the erection work device is mounted is moved by its bogie to be lifted by a lifting machine of the erection work device. Is transported along the bridge girder part to the tip of the bridge girder part under the bridge girder part that has already been erected, and the erection girder is extended and erected on the side in the hand extending direction. From the tip of the bridge girder part, and then move the counterweight to the erection. Moving the erection work device onto the erection girder in the hand-drawing direction while moving the erection girder to a portion opposite to the hand-drawing direction side portion, and then lifting the lifting device by the lifting device of the erection work device. The bridge girder member in the folded state is pulled up to a predetermined height, the bridge girder member is extended to the tip of the bridge girder part that has already been extended, and then the counterweight is vertically aligned with the bogie. And moving the erection work device on the erection girder so as to be vertically aligned with the cart of the traveling girder with the erection girder interposed therebetween, and thereafter, the traveling device mounted with the erection work device The girder is moved by the bogie, and the girder is moved over the overhanging bridge girder. Is returned to a position near the pier.

The erection apparatus according to the fourth aspect of the present invention, which can be used in the erection method according to the first aspect of the present invention,
A traveling girder comprising an erection girder, a bogie traveling while supporting the erection girder such that the support position can be changed, a lifting machine for lifting a bridge girder member to be erected, and moving on the erection girder supporting the lifting girder. And a erection work device mounted on the erection girder of the traveling girder, which can be used in the erection method according to the present invention according to claim 2. Item 5: The erection device according to the present invention described in Item 5, wherein a traveling girder including an erection girder, a bogie that travels while fixing and supporting the erection girder, a lifting device for lifting a bridge girder member to be mounted, and A moving platform that moves on the erection girder, And a erection work device mounted on the erection girder of the traveling girder, which can be used in the erection method according to the third aspect of the present invention. The erection device according to claim 5,
The traveling girder includes a counterweight movable along an extending direction of the erection girder.

According to the erection method according to the present invention, the bridge girder member is transported from the vicinity of the pier to the tip of the bridge girder part that has already been erected and is erected at the tip end. The work yard used for the construction of the bridge pier, which is indispensable when constructing the bridge, can be used as the work site.Therefore, it is necessary to secure the work site for erection of the bridge girder and to construct and maintain the land. Since there is no need, bridge construction costs can be reduced and the impact on the surrounding environment can be reduced. In addition, even if the construction site of the bridge is on the sea, river, or road, if there is enough space under the bridge, it can be constructed simply by using the sea area, water area or land near the pier, so traffic regulation accompanying construction is Can be reduced.

According to the erection method of the present invention described in claims 1 to 3, the erection device used here, which is a combination of a traveling girder and an erection work device mounted thereon, is capable of lifting members.・ Carrying and erection can all be performed by one device, and erection on the left and right can be performed by one unit with the pier sandwiched. Therefore, crane equipment etc. for picking up the bridge girder member on the already installed bridge girder part Can be omitted, and the number of erection equipment can be reduced as compared with the case of performing the conventional cantilever method.

Further, according to the erection method of the present invention, the bridge girder member which has been previously erected is lifted and transported by the erection work device mounted on the traveling girder. Since the overhang is installed at the tip of the overhanging bridge girder, less work is required on the bridge, so the construction period can be equalized or shortened compared to other conventional methods. According to the second and third aspects of the present invention, it is not necessary to change the position of the erection girder on the traveling girder carriage, so that the construction period can be further reduced.

According to the erection apparatus of the present invention described in claims 4 to 6, the effects of the erection method of the present invention described above can be obtained. In the erection device of the present invention, the lifting device of the erection work device has a frame that horizontally projects beyond both ends in the width direction of the erection girder, and the bridge girder member is provided from both ends of the frame. Both ends may be lifted, so that the bridge girder member can be hung in a well-balanced manner, and a wire for lifting, etc., is placed with the bridge girder part already overhanging and placed therebetween. Since it can be easily lowered to the outside of both ends in the width direction to avoid interference with the bridge girder, the lifting of the bridge girder member and the transportation along the bridge girder below the bridge girder can be performed quickly and safely. be able to.

In the erection apparatus according to the present invention, the hoisting machine of the erection work apparatus may include a wire clamp jack for clamping a wire rope and continuously pulling up the wire rope, or a strand made of PC steel wire. It may be provided with a strand jack that is continuously pulled up by clamping. If such a wire clamp jack or a strand jack is provided, the lifting machine can be made small and lightweight for its lifting capacity, and the entire erection apparatus can be made compact.

On the other hand, in the erection device according to the present invention, the hoisting machine of the erection work device may include a usual winch for winding a wire rope or a chain block for winding a chain.
Since winches and chain blocks can be manufactured or obtained relatively inexpensively, the lifting machine can be constructed at low cost.

In the erection device of the present invention,
At least one of the truck of the traveling girder and the truck of the erection work device may be a self-propelled vehicle equipped with a power source, so that a separate power source may be unnecessary, and Equipment can be further reduced, and the truck of the traveling girder and the moving platform of the erection work device are powered by winches, hydraulic cylinders, strand jacks, etc. separately installed on the bridge girder part that has already been erected. It may be one that travels or moves while being driven by the source, and in that case, escape of the bogie or the mobile platform can be easily prevented.

[0022]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Here, FIGS. 1 and 2 are explanatory views showing the procedure of erection of the bridge girder member in one embodiment of the erection method according to the first aspect of the present invention, and FIGS. FIG. 4 is a side view and a plan view showing one embodiment of the erection apparatus according to the present invention, which is used in the erection method of the present invention, and FIG.
It is a front view which expands and shows the installation apparatus of the said Example.

First, the erection apparatus of the above embodiment will be described. Reference numeral 1 in the figure denotes an erection apparatus of the embodiment, and this erection apparatus 1 has a traveling girder 2 and a traveling girder 2 as shown in FIGS. The traveling girder 2 is constructed by combining an erection work vehicle 3 as an erection work device, and an erection girder (erection girder) 4 constituted by a plate girder (sheet girder) and a separable connection (not shown) of the erection girder 4. The traveling girder 2 comprises an electric motor 5a as a power source and a self-propelled carriage 5 driven by the electric motor 5a. Travels on the track 6a laid on the bridge girder portion 6 already erected. Although the erection girder 4 is constituted by a plate girder in this embodiment, it may be constituted by a girder having another structure such as a truss structure. In this embodiment, an electric motor is used as a power source to be mounted on the carriage 5, but other power sources such as a wire clamp jack, a strand jack, and a hydraulic cylinder, which will be described later, may be used.

The erection work vehicle 3 here is provided with a hoisting machine 8 for hoisting the bridge girder member 7 to be erected, and an electric motor 9a which supports the hoisting machine 8 and serves as a power source.
And a carriage 9 as a movable platform that is self-propelled by being driven by the electric motor 9a.
The erection work vehicle 3 is mounted on an erection girder 4 of the traveling girder 2 and travels on a track 4 a laid on the erection girder 4.

The lifting machine 8 can be selected to be optimal for the bridge to be constructed in consideration of the lifting load and the lifting height. In this embodiment, as shown in FIG. A frame 10 is formed by assembling steel members in a cross-beam so as to project horizontally beyond both ends in the width direction of the erection girder 4 and the bridge girder portion 6 which is already erected and has substantially the same width. A known wire clamp jack 12 for continuously pulling up the wire 11 by repeatedly switching the clamping position by two gripping mechanisms and pulling the wire by the vertical hydraulic cylinder on both ends in the horizontal direction (left and right direction in FIG. 4) of FIG. At the lower end of the wire 11 which is pulled up by the four wire clamp jacks 12 in total, and is substantially the same as the frame 10. The pallet 13 having a width is detachably connected for lifting the bridge girder member 7. For example, a strand made of PC steel wire is switched between a clamping position by two gripping mechanisms and a traction by a vertical hydraulic cylinder. A known strand jack that is continuously pulled up by repetition, a usual winch that winds up a wire rope, a chain block that winds up a chain, and the like may be mounted on the frame 9.

In this embodiment, an electric motor is also used as the power source mounted on the carriage 9 in the same manner as the carriage 5, but other power sources such as the wire clamp jack, the strand jack, and the hydraulic cylinder are used. A thing may be used.

Next, the erection method according to the above embodiment will be described. This erection method is used when a continuous girder as shown in FIG. 5A or a bridge girder 14 of a ramen bridge as shown in FIG. In the case where the bridge girder member 7 is successively cantilevered while being balanced in two directions from left to right from 15 and a bridge girder such as a continuous girder as shown in FIG. 6 (a) or a ramen girder as shown in FIG. 6 (b). When the bridge girder member 7 is cantilevered in one direction using the bridge girder part 6 already installed by the conventional method using a vent 16 or the like as a counterweight, the minimum land area near the pier 15 is required. In this erection method, the bridge girder 14 can be erected using the erection equipment, and in this erection method, the bridge girder member We carry out erection erection .

That is, as shown in FIG. 1 (a), the traveling girder 2 of the erection device 1 is arranged at a position near the pier 15 on the bridge girder portion 6 already erected, and its traveling is performed. The erection work vehicle 3 of the erection device 1 is mounted on the erection girder 4 of the girder 2, and the carriage 5 of the traveling girder 2 is moved in the extending direction for erection of the bridge girder member 7 of the erection girder 4 (FIG. 1). The right side in FIG. 1A and the opposite side (FIG. 1A)
Then, the support position of the erection girder 4 by the carriage 5 is set so as to support the left part),
The erection work vehicle 3 is disposed on the erection girder 4 at a position vertically aligned with the carriage 5 of the traveling girder 2 with the erection girder 4 interposed therebetween. The jack 16 is interposed between the erection girder 6 and the end of the erection girder 4 in the hand extending direction.

Here, (1) First, FIG.
As shown in (a), the bridge girder member 7 installed on the right end of the bridge girder portion 6 already installed is replaced with the bridge girder member 7 installed on the right above the position near the pier 15 of the bridge girder portion 6 already installed. At the bridge girder lifting place, the ground is assembled on the pallet 13 or made at another yard, transported to the bridge girder lifting place and placed on the pallet 13, (2) Next, as shown in FIG. Then, the bridge girder member 7 placed at the bridge girder lifting place is lifted by the lifting machine 8 of the erection work vehicle 3 to a height immediately below the bridge girder portion 6 already erected, (3) and simultaneously with or simultaneously with the lifting thereof After the completion of the above, as shown in FIG. 1 (c), after removing the jack 16 temporarily receiving the end of the erection girder 4 in the hand extending direction, the traveling girder 2 on which the construction work vehicle 3 is mounted is moved by the bogie 5 thereof. Move The bridge girder member 7 in a state of being lifted by the hoisting machine 8 of the erection work vehicle 3 is transported along the bridge girder portion 6 to the tip of the bridge girder portion 6 below the bridge girder portion 6 that has already been overhanging and erected. The traveling girder 2 of the traveling girder 2 is extended from the tip of the bridge girder portion 6 (FIG. 1 (c)) to the extending direction side (the right side in FIG. 1 (c)).
Let's reach to the right).

(4) Next, as shown in FIG. 1 (d), the erection girder 4 of the traveling carder 2 is positioned before and after the bogie 5 with the erection girder 4 and the bridge girder portion 6 which has already been erected. And an end (the left end in FIG. 1D) of the erection girder 4 opposite to the hand extending direction side is connected to the bridge girder portion 6 by a connecting member 17. (5) Next, as shown in FIG. 1 (e), the erection work vehicle 3 is moved to the hand-extending direction side portion of the erection girder 4 (the right side portion in FIG. 1 (e)). The bridge girder member 7 in a state of being lifted by the lifting machine 8 of the construction work vehicle 3 by moving the bridge girder member 7 upward is transported forward of the tip of the bridge girder portion 6 which has already been erected and (6) Next,
As shown in FIG. 1 (f), the lifting machine 8 of the erection work vehicle 3
Accordingly, the bridge girder member 7 in the suspended state is pulled up to the height of the tip of the bridge girder portion 6 that has already been extended and erected, and the bridge girder member 7 is joined to the tip of the bridge girder portion 6.

Then, here, (7) First, FIG.
As shown in (a), the traveling direction of the erection girder 4 of the traveling carder 2 is further supported by a jack 16 and the pallet 13 is lowered slightly.
(8) Next, as shown in FIG. 2B, the front jack 16 and the connecting member 17 of the bogie 5 are removed, and the rear jack 16 of the bogie 5 and the end of the erection girder 4 in the hand-extending direction are removed. The erection girder 4 is trolley 5 with the jack 16 of the part
The trolley 5 is moved while being floated from the erection girder 4, thereby changing the support position of the erection girder 4 by the trolley 5 of the traveling girder 2 to the center of the erection girder 4 and moving the construction work vehicle 3 on the erection girder 4. Then, the erection girder 4 is moved to a position vertically aligned with the carriage 5 of the traveling girder 2 with the erection girder 4 interposed therebetween.

(9) Next, as shown in FIG. 2 (c), the traveling girder 2 on which the erection work vehicle 3 is mounted is moved by the carriage 5, and Return to the position near the pier 15 and pallet
13 is lowered to the bridge girder lifting place on the ground and separated from the lower end of the wire 11, and the next bridge girder member is prepared on the pallet 13, while the traveling girder 2 is further moved to the position near the previous pier 15 and Is moved to a position near the pier 15 on the opposite side of the pier 15. When the bridge girder member 7 is not lifted, as shown in FIG. 2 (b), the erection work vehicle 3 and the bogie 5 are arranged at positions vertically aligned with the central portion of the erection girder 4 interposed therebetween. The reason why the traveling girder 2 is moved is to prevent the balance of the erection girder 4 from being lost during the movement. When the bridge girder member 7 is lifted, the weight of the bridge girder member 7 is transferred via the erection work vehicle 3. As shown in FIG. 1 (c), even if the traveling girder 2 is moved while the erection girder 4 is offset from the erection work vehicle 3 and the bogie 5, the balance of the erection girder 4 is lost. There is no.

(10) Next, as shown in FIG.
The truck 5 is moved in a state in which the erection girder 4 is lifted from the truck 5 and supported by jacks 16 inserted between the end of the erection girder 4 on the hand extending direction side and the opposite end and the bridge girder portion 6. As a result, the truck 5 of the traveling girder 2 is
The hand-drawing direction side for erection of the bridge girder member 7 (this time, FIG.
In FIG. 1 (d), the support position of the erection girder 4 by the carriage 5 is changed so as to support the opposite part (the right part in FIG. 1 (d)). 4, the erection girders 4 are interposed therebetween, and the erection girders 4 are arranged at positions vertically aligned with the trucks 5 of the traveling girder 2. Another pallet 13 is placed on the bridge girder lifting position on the ground immediately below the position near the pier 15 located above, and the other bridge girder member 6 is placed on the other pallet 13 in the same manner as the previous bridge girder member 7. In the figure, a bridge girder member 7 to be installed on the left end is prepared.

(11) Thereafter, as shown in FIG. 2 (e), between the end (right end in FIG. 1 (d)) of the erection girder 4 on the side opposite to the hand-extending direction and the bridge girder portion 6. In addition to supporting the erection girder 4 with the bogie 5 by removing the jack 16 of the above, the other pallet 13 placed on the bridge girder lifting position above the bridge girder part 6 that has already been installed, just below the position near the pier 15 above. Is connected to the lower end of the wire 11 of the hoisting machine 8, and the bridge girder member 7 prepared on the other pallet 13 is lifted and transported in the same procedure as described above, and the bridge girder part 6 is In the figure, it is erected at the left end.

Therefore, according to the erection method of this embodiment,
The bridge girder member 7 is transported from the vicinity of the pier 15 to the tip of the bridge girder part 6 that has already been erected and is erected at the tip, so that it can be used as a work site for the construction of the pier 15 which is indispensable when constructing a bridge. The work yard used can be used, so there is no need to secure work land for erection of the bridge girder and to construct and maintain the land, thereby reducing bridge construction costs and affecting the surrounding environment. Can be reduced. Also, even if the construction site of the bridge is on the sea, river, or road, if there is enough space under the bridge, it can be constructed only by using the sea area, water area or land near the pier 15, so the traffic involved in the construction Regulations can be reduced.

Further, according to the erection method of this embodiment, the erection apparatus 1 combining the traveling girder 2 and the erection work vehicle 3 mounted thereon can be used for lifting, transporting, All the erections can be performed by one device, and the left and right erections can be performed by one unit with the pier 15 interposed. Therefore, crane equipment for picking up the bridge girder member 7 on the already installed bridge girder part 6 It is possible to omit various types of erection equipment, and to greatly reduce the number of erection equipment as compared with the case where the conventional cantilever method is performed.

Further, according to the erection method of this embodiment,
The bridge girder member 7 previously laid is lifted and transported by the erection work vehicle 3 mounted on the traveling girder 2, and is erected at the tip of the already erected bridge girder portion 6, so that it is erected on the bridge. Since less work is required, the construction period can be made equal to or shorter than other conventional construction methods.

According to the erection apparatus 1 of this embodiment, the operation and effect of the erection method of the above embodiment can be obtained, and the lifting machine 8 of the erection work vehicle 3 can be mounted on both ends of the erection girder 4 in the width direction. The frame 10 protrudes horizontally beyond the frame 10 and both ends of the bridge girder member 7 are lifted from both ends of the frame 10, so that the bridge girder member 7 can be hung in a well-balanced manner and the lifting wire 11 Since the bridge girder part 6 which has already been erected is placed between the bridge girder parts 6 and lowered to the outside of the both ends in the width direction, interference with the bridge girder part 6 can be easily avoided. The transport along the bridge girder portion 6 below the bridge girder 6 can be performed quickly and safely.

In the erection apparatus 1 of this embodiment,
Since the lifting machine 8 of the erection work vehicle 3 is provided with the wire clamp jack 12 that clamps the wire 11 and continuously raises the wire 11, the lifting machine 8 can be made small and lightweight for its lifting capacity. Therefore, the entire erection apparatus can be made compact, and the trolley 5 of the traveling girder 2 and the trolley 9 of the erection work vehicle 3 are both self-propelled with an electric motor as a power source. A separate power source may not be required, and the number of erection equipment may be further reduced.

FIGS. 7 and 8 are explanatory views showing a procedure for erection of a bridge girder member in one embodiment of the erection method according to the second aspect of the present invention. FIGS. It is a side view and a plan view showing another embodiment of the erection device of the present invention according to claim 4, which is used in the erection method.

The erection apparatus 1 of this embodiment is composed of a traveling girder 2 and an erection work vehicle 3 as an erection work apparatus, similarly to the erection apparatus of the previous embodiment shown in FIGS. Unlike the previous embodiment, the traveling girder 2 here is constituted by a plate girder so as to be approximately 1.5 times as long as that of the previous embodiment. The length of the erection girder 4 can be extended in both directions in the longitudinal direction. The erection girder 4 is fixed to the lower surface of the central portion of the erection girder 4 to support the erection girder 4 and an electric motor as a power source. A trolley 5 having a motor 5a and driven by the electric motor 5a. And jacks 16 as temporary receiving members fixed to both sides of the bogie 5 in the longitudinal direction of the erection girder 4 on the lower surface of the trolley 5, respectively, and fixed to both ends of the lower surface of the erection girder 4 in the longitudinal direction. And a connecting member 17 serving as a lift stop. Although the erection girder 4 is constituted by a plate girder in this embodiment, it can also be constituted by a girder having another structure such as a truss structure. In addition, the jack 16 and the connecting member
17 may be inserted or attached at the time of their use as in the previous embodiment. In this embodiment, an electric motor is used as a power source mounted on the carriage 5,
For this, for example, a wire clamp jack or a strand jack, which will be described later, or another structure such as a hydraulic cylinder may be used.

The erection work vehicle 3 here has a lifting machine 8 for lifting the bridge girder member 7 to be erected and an electric motor 9a as a power source for supporting the lifting machine 8 as in the previous embodiment. And a carriage 9 as a movable table that is driven by an electric motor 9a. The erection work vehicle 3 is also mounted on the erection girder 4 of the traveling girder 2 and is mounted on the erection girder. Track laid on 4
Drive on 4a. The lifting machine 8 and the trolley 9 can be the same as those in the previous embodiment.

Next, the erection method according to the above embodiment will be described. This erection method is also applicable to the construction of a continuous girder as shown in FIG. 5 (a) or a bridge girder 14 of a ramen bridge as shown in FIG. 5 (b). In the case where the bridge girder member 7 is successively cantilevered while being balanced in two directions from left to right from 15 and a bridge girder such as a continuous girder as shown in FIG. 6 (a) or a ramen girder as shown in FIG. 6 (b). When the bridge girder member 7 is cantilevered in one direction using the bridge girder part 6 already installed by the conventional method using a vent 16 or the like as a counterweight, the minimum land area near the pier 15 is required. In this method, the bridge girder 14 can be erected using the erection equipment. In this erection method, the erection apparatus 1 of the above embodiment shown in FIG. Cantilever of the bridge girder member 7 Ri out perform the erection.

That is, as shown in FIG. 7A, the traveling girder 2 of the erection device 1 is arranged at a position near the pier 15 on the bridge girder portion 6 already erected, and its traveling is performed. The erection work vehicle 3 of the erection device 1 is mounted on the erection girder 4 of the girder 2, and the erection work vehicle 3 is mounted on the erection girder 4.
, Whereby the erection work vehicle 3 is vertically aligned with the truck 5 of the traveling girder 2 with the erection girder 4 interposed therebetween.

Here, (1) First, FIG.
As shown in (a), the bridge girder member 7 installed on the right end of the bridge girder portion 6 already installed is replaced with the bridge girder member 7 installed on the right above the position near the pier 15 of the bridge girder portion 6 already installed. Assemble the ground on the pallet 13 at the bridge girder lifting place or make it in another yard, transport it to the bridge girder lifting place and place it on the pallet 13 (2) Then, as shown in FIG. Then, the bridge girder member 7 placed at the bridge girder lifting place is lifted by the lifting machine 8 of the erection work vehicle 3 to a height immediately below the bridge girder portion 6 already erected, (3) and simultaneously with or simultaneously with the lifting thereof 7C, the traveling girder 2 on which the erection work vehicle 3 is mounted is moved by the carriage 5, and the bridge girder member 7 in a state of being lifted by the lifting machine 8 of the erection work vehicle 3, as shown in FIG. Already overhanging Along the bridge girder part 6 provided along the bridge girder part 6 to the leading end of the bridge girder part 6, the traveling girder 2 of the erection girder 4 has a portion in the hand extending direction (FIG. In FIG. 7 (c), the right part) is extended forward (to the right in FIG. 7 (c)) from the tip of the bridge girder part 6 that has already been erected.

(4) Next, as shown in FIG. 7 (d), the erection girder 4 of the traveling carder 2 is fixed to the lower surface of the erection girder 4 at positions on both sides of the carriage 5, and 4 and the bridge girder portion 6 which has already been erected and supported by the jack 16 and the end of the erection girder 4 opposite to the current hand-drawing direction (the left end in FIG. 7D). ) Is connected to the bridge girder part 6 by the connecting member 17 fixedly provided on the lower surface of the erection girder 4 to prevent the traveling carder 2 from lifting up. (5) Next, as shown in FIG. The erection work vehicle 3 is moved to the hand-extending direction side portion (the right side portion in FIG. 7E) of the erection girder 4 and is lifted by the lifting machine 8 of the erection work vehicle 3. The bridge girder member 7 is transported forward from the end of the bridge girder portion 6 that has already been erected and erected, and (6)
Next, as shown in FIG. 7 (f), the lifting device 8 of the erection work vehicle 3 lifts the bridge girder member 7 in the above-mentioned state to the height of the tip of the bridge girder portion 6 that has already been extended and erected. The bridge girder member 7 is joined to the tip of the bridge girder portion 6.

Then, here, (7) First, FIG.
As shown in (a), the pallet 13 is slightly lowered,
(8) Next, as shown in FIG. 8B, the erection work vehicle 3 is returned to the center of the erection girder 4, and the erection work vehicle 3 is placed on the bogie of the traveling girder 2 with the erection girder 4 interposed therebetween. 5 and a trolley 5
The jacks 16 on both sides are retracted to separate from the bridge girder part 6, and the connecting member 17 is removed from the bridge girder part 6.

(9) Next, as shown in FIG. 8 (c), the traveling girder 2 on which the erection work vehicle 3 is mounted is moved by the carriage 5, and Return to the position near the pier 15 and pallet
13 is lowered to the bridge girder lifting place on the ground and separated from the lower end of the wire 11, and the next bridge girder member is prepared on the pallet 13, while the traveling girder 2 is further moved to the position near the previous pier 15 and Is moved to a position near the pier 15 on the opposite side of the pier 15. In this embodiment, since the carriage 5 fixedly supports the central portion of the erection girder 4, the erection work vehicle 3 is vertically aligned with the carriage 5 on the central portion of the erection girder 4 with the erection girder 4 interposed therebetween. As long as the traveling girder 2 is moved, the balance of the erection girder 4 is not lost. Therefore, in the method of this embodiment, the number of times the jack 16 is used can be reduced as compared with the case of the method of the previous embodiment.

(10) Next, as shown in FIG.
Another pallet 13 is arranged at a bridge girder lifting position above the bridge girder portion 6 that has already been built, immediately below the position near the pier 15 on which the construction work vehicle 3 is located, and the other pallet. 13 on bridge girder member 7
In the same figure of the bridge girder portion 6, a bridge girder member 7 to be installed on the left end is prepared.

(11) Then, as shown in FIG. 8 (e), the other pallet placed on the bridge girder lifting position on the ground immediately below the position near the pier 15 in the bridge girder part 6 already erected. 13 is connected to the lower end of the wire 11 of the hoisting machine 8, and the bridge girder member 7 prepared on the other pallet 13 is lifted and transported in the same manner as described above, and In the same figure, it is erected at the left end.

Therefore, according to the method of this embodiment, the same effects as in the previous embodiment can be obtained. In addition, according to the method of this embodiment, the center of the erection girder 4 is
, And there is no need to change the position of the erection girder 4 on the carriage 5 during the erection work, so that the construction period can be further reduced.

According to the erection apparatus 1 of this embodiment,
Since the position of the erection girder 4 on the trolley 5 is not changed, the jack 16 and the connecting member 17 are fixed to the erection girder 4, so that they need to be arranged and mounted one by one when using them. In this respect, the construction period can be further reduced in this respect. In addition, according to the erection apparatus 1 of this embodiment, the connecting member 17 is connected to the front fulcrum (the jack 1 on the hand extending direction side) with a small acting force.
6) It can be installed farther from
Can be made simpler.

FIG. 10 is a side view showing still another embodiment of the erection apparatus according to the fourth aspect of the present invention, which is used in one embodiment of the erection method according to the third aspect of the present invention. The erection apparatus 1 of this embodiment has a configuration substantially similar to that of the erection apparatus of the previous embodiment shown in FIG. That is, also in this embodiment, the carriage 5 fixedly supports the central portion of the erection girder 4. In addition, in the erection device 1 of this embodiment, pulleys 18 are pivotally supported at both ends in the longitudinal direction of the erection girder 4, and both sides of the erection girder 4 in the width direction substantially correspond to the weight of one bridge girder member 7. The weight of the counterweight unit 19 is supported movably in the longitudinal direction of the erection girder 4 under the guidance of a guide rail (not shown), and the counterweight unit 19 is connected to the pulleys located at both ends of the erection girder 4. The erection work vehicle 3 is connected to the erection work vehicle 3 by a wire rope 20 stretched between 18, and moves in a direction opposite to the moving direction of the erection work vehicle 3 in conjunction with the movement of the erection work vehicle 3. . In this embodiment, jacks 16 are provided on the lower surfaces of both ends in the longitudinal direction of the erection girder 4 instead of the connecting members 17 in the previous embodiment.

In the above embodiment of the erection method according to the third aspect of the present invention, by using the erection apparatus 1 having such a configuration, a method similar to that of the previous embodiment shown in FIGS. When moving the construction work vehicle 3 in the hand-extending direction on the erection girder 4, the counterweight unit 19 is moved in the direction opposite to the construction work vehicle 3 to balance the erection girder 4 of the construction device 1.

Therefore, according to the method of this embodiment, the labor of manually connecting the connecting member 17 to the bridge girder portion 6 can be eliminated, and the time-consuming lifting work can be eliminated, and the construction period can be further reduced. At the same time, it is possible to fully automate the erection work on the bridge girder portion 6.

Although the present invention has been described with reference to the illustrated examples, the present invention is not limited to the above-described examples. For example, the number of mounted wire clamp jacks 12 can be increased or decreased.
Also, as a method of moving the moving table of the erection work device, a skate that slides along the rail on the erection girder instead of wheels is provided on the moving table, and a winch, hydraulic cylinder,
A slide jack may be used to slide the carriage, in which case a lubricant such as grease may be applied to the rail or skate surface in order to reduce friction between the rail and the skate. Special processing may be performed, or a number of steel balls may be interposed between the rail and the skate to constitute a linear ball bearing. This method using a skate is unsuitable for long-distance movement because it cannot be moved at high speed, but if it is moved on an erection girder as in the present invention, the movement distance is short and it is necessary to prevent runaway. This method is suitable because it is not necessary to move the mobile platform at high speed from the viewpoint of safety, and where it is necessary to adjust the position of the bridge girder member relatively finely when joining the bridge girder member to the tip of the bridge girder part, use this skate According to this, the fine position adjustment can be easily performed.

When the bridge girder member erection device of the present invention is erected in only one direction, the lower surface of the erection girder opposite to the hand side may be fixedly supported by a bogie. . The bridge girder member erection device of the present invention can also be applied to a suspension method under the bridge when the bridge girder member is transported by a barge or the like on the sea or river and can be stopped immediately below the erection position.

As described above, the present invention includes various modes that can be modified by those skilled in the art from the above-described examples within the scope of the claims. Bridges to which the erection method of the present invention can be applied are classified as follows. (1) Classification according to bearing conditions and bridge girder support conditions during construction Cantilever overhang construction of T-type rigid frame bridge, cantilever overhang construction of multi-span continuous rigid frame bridge, and cantilever overhang construction of multi-span continuous girder bridge. (2) Classification according to bridge component materials Concrete bridges, steel bridges, composite concrete / steel bridges, etc. (3) Classification by main girder type Box girder bridge, I girder bridge, T girder bridge, truss bridge, etc.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first half of a procedure for installing a bridge girder member in an embodiment of an installation method of the present invention.

FIG. 2 is an explanatory view showing the latter half of the procedure for installing a bridge girder member in one embodiment of the method of the present invention.

FIG. 3 is a side view and a plan view showing one embodiment of the erection apparatus of the present invention used in the erection method of the above embodiment.

FIG. 4 is an enlarged front view showing the erection apparatus of the embodiment.

FIG. 5 is an explanatory view illustrating a bridge to which the erection method of the above embodiment can be applied.

FIG. 6 is an explanatory view further illustrating a bridge to which the erection method of the above embodiment can be applied.

FIG. 7 is an explanatory view showing a first half of a procedure for installing a bridge girder member in another embodiment of the method for installing the bridge of the present invention.

FIG. 8 is an explanatory diagram showing the latter half of the procedure for installing a bridge girder member in the above another embodiment of the installation method of the present invention.

FIG. 9 is a side view and a plan view showing another embodiment of the erection apparatus of the present invention used in the erection method of the above another embodiment.

FIG. 10 is a side view showing still another embodiment of the erection apparatus of the present invention used in still another embodiment of the erection method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Construction apparatus 2 Traveling girder 3 Construction work vehicle 4 Erection girder 5 Dolly 6 Bridge girder part already installed 7 Bridge girder member 8 Lifting machine 9 Dolly 10 Frame 11 Wire 12 Wire clamp jack 13 Pallet 14 Bridge girder 15 Bridge girder 16 Jack 17 Connecting member 18 Pulley 19 Counterweight unit 20 Wire rope

Claims (11)

[Claims] 1. A traveling girder comprising an erection girder and a bogie traveling on the bridge girder while supporting the erection girder such that the support position can be changed, on a bridge girder part that has already been erected. In addition, an erection work device having a lifting device for lifting a bridge girder member to be erected and moving on the erection girder of the traveling girder is mounted on the erection girder, firstly, the erection girder by a cart of the traveling girder. The support position of the erection girder is a portion opposite to the extending direction side for erection of the bridge girder member, and the erection work device is placed on the erection girder with the erection girder interposed therebetween. Align vertically with the traveling girder cart The traveling girder, and disposing the traveling girder at a position near the pier on the bridge girder part that has already been erected, and then, near the pier, using the lifting device of the erection work device, The bridge girder in a state of being lifted by a lifting machine of the erection work device by moving the traveling girder on which the erection work device is mounted by moving the traveling girder under the bridge girder portion that has already been erected, and moving the traveling girder. It is transported along the bridge girder part to the tip of the bridge girder part below the bridge girder part that has already been erected, and the tip of the bridge girder part that has already erected the erection girder in the hand extending direction. From the front, and then the traveling girder is attached to the bridge girder part After being tied and stopped from lifting, the erection work device is moved onto the hand-drawing-direction side portion of the erection girder, and then, the lifting device of the erection work device lifts the bridge girder member in the lifted state to a predetermined position. Pull up to height,
The bridge girder member is erected to the tip of the bridge girder part that has already been erected, and then the traveling girder is released from the connection between the traveling girder and the bridge girder part that is already erected. The support position of the erection girder by the trolley is changed to the center of the erection girder, and the erection work device is vertically aligned on the erection girder with the trolley of the traveling girder with the erection girder interposed therebetween. A bridge girder member, wherein the traveling girder on which the erection work device is mounted is moved by the bogie, and returned to a position near a pier on the bridge girder part that has already been erected. Erection method. 2. A traveling girder comprising a carriage running on the bridge girder and an erection girder fixed on the carriage is provided on a bridge girder that has already been erected. An erection work device having a lifting machine for lifting the member and moving on the erection girder of the traveling girder is mounted on the erection girder. First, the erection girder is mounted on the erection girder. The traveling girder is aligned vertically with the bogie of the traveling girder, and the traveling girder is arranged at a position near a pier on the bridge girder part that has already been erected, and then, near the pier, The bridge girder member is already extended by the lifting device of the erection work device. In addition to lifting the bridge girder below the bridge girder part, the traveling girder on which the construction work device is mounted is moved by its carriage, and the bridge girder member in a state of being lifted by the lifting machine of the construction work device is already overhanged. It is transported along the bridge girder part to the tip of the bridge girder part below the bridge girder part that has been erected, and the hand extending direction side part of the erection girder is forwardly extended from the tip end of the bridge girder part that is already erected and erected. Then, after connecting the traveling girder to the bridge girder part that has already been erected and suspended, the erection girder is moved onto the part of the erection girder in the direction of the elongation, Next, the lifting device of the erection work device raises the bridge girder member in the lifted state to a predetermined height. And pull it up
Overhanging the bridge girder member to the tip of the bridge girder part that has already been erected, and then releasing the connection between the traveling girder and the bridge girder part that has already been erected, The device is moved on the erection girder, in a state of being vertically aligned with the truck of the traveling girder with the erection girder interposed therebetween, and then the traveling girder equipped with the erection work device is moved by the trolley. And returning the bridge girder member to a position near the pier on the bridge girder part that has already been erected. 3. A trolley traveling on the bridge girder, an erection girder fixed on the trolley, and movable along an extending direction of the erection girder on a bridge girder part that has already been erected. A traveling girder including a counterweight is provided, and an erecting girder having a lifting device for lifting a bridge girder member to be installed and moving on the erection girder of the traveling girder is mounted on the erection girder. First, the erection work device is placed on the erection girder so as to be vertically aligned with the trolley of the traveling girder with the erection girder interposed therebetween, and the counterweight is vertically aligned with the trolley of the traveling girder. To the traveling state The bridge girder member is placed at a position near the pier on the bridge girder part that has already been erected, and then, near the pier, the lifting girder of the erection work device connects the bridge girder member to the bridge girder part that has already been erected. While lifting the bridge girder below the portion, the traveling girder on which the erection work device is mounted is moved by the bogie, and the bridge girder member in a state of being lifted by the hoisting machine of the erection work device is connected to the bridge girder that has already been erected. Transporting the lower part of the erection girder along the bridge girder part to the tip of the bridge girder part, and extending the hand-extension side part of the erection girder forward from the tip of the bridge girder part that has already been extended and erected, Next, while moving the counterweight to a portion of the erection girder opposite to the hand-extending direction side, , The erection work device is moved on the hand total direction side portion of the erection girder, then by lifting machine of the construction work device, raising the bridge girder member of the lifting state to a predetermined height,
Overhanging the bridge girder member to the tip of the bridge girder portion that has already been overhanging is carried out, and then the counterweight is moved to a state in which it is vertically aligned with the bogie. On the above, the erection girder is interposed and moved to a state of being vertically aligned with the truck of the traveling girder, and then the traveling girder equipped with the erection work device is moved by the trolley, and A method of erection of a bridge girder member, wherein the bridge girder member is returned to a position near a pier on the bridge girder part. 4. A traveling girder comprising an erection girder, a bogie traveling while supporting the erection girder such that the support position can be changed, a lifting device for lifting a bridge girder member to be installed, and a lifting device for supporting the lifting device. An installation device for a bridge girder, comprising: a moving platform that moves on an erection girder; and an erection work device mounted on the erection girder of the traveling girder. 5. A traveling girder comprising an erection girder, a truck fixedly supporting and running the erection girder, a lifting device for lifting a bridge girder member to be erected, and supporting the lifting device on the erection girder. An installation device for a bridge girder, comprising: a moving platform that moves, and an installation device that is mounted on the erection girder of the traveling girder. 6. The bridge girder member erection device according to claim 5, wherein the traveling girder includes a counterweight movable along an extending direction of the erection girder. 7. The lifting machine of the erection work device,
7. A frame which projects horizontally beyond both ends of the erection girder in the width direction, wherein both ends of the bridge girder member are lifted from both ends of the frame. 8. The bridge girder member erection device according to any one of the above. 8. The lifting device of the erection work device,
It is equipped with a wire clamp jack that clamps the wire rope and pulls it up continuously.
An installation device for a bridge girder member according to any one of claims 4 to 7. 9. The lifting machine of the erection work device,
The bridge girder member erection device according to any one of claims 4 to 7, further comprising a strand jack that clamps a strand made of PC steel wire and continuously raises the strand. 10. The lifting device of the erection work device according to claim 4, wherein the lifting device includes a winch for winding a wire rope or a chain block for winding a chain. Bridge girder erection device. 11. The vehicle according to claim 4, wherein at least one of the truck of the traveling girder and the movable platform of the erection work device is self-propelled with a power source mounted thereon. The bridge girder member erection device according to any one of the above.