JPH10219626A - Movable form timbering device to install bridge and moving execution method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively use a bridge upper surface by arranging a rail body under an existing girder, arranging a timbering body under the existing girder on the rail body, and engaging the rail body and the timbering body with each other so as to be mutually freely movable through a moving means. SOLUTION: A rail body 15 is released, the rail body 15 is supported by a timbering body 21 and moved forward along a rail 13 through a wheel mechanism 22, an anchor bolt 11a and a suspending anchor jack 11 are fixed to a girder 10 from a connecting part 24A under an existing girder 10, a reaction jack 12 is extended under the girder 10, and the rail body 15 is fixed. Next, the timbering body 21 is released, and the timbering body 21 is supported by the rail body 15 and moved forward along the rail 13 through the wheel mechanism 22, an anchor bolt 16a and a suspending anchor 16 are fixed to the girder 10 from a connecting part 25A, a reaction jack 17 is extended under the girder 10, the timbering body 21 is fixed, and a form 19 is arranged just under an installing point H. Thereby, since an installing movable form timbering device is arranged on a bridge under surface, a bridge upper surface can be effectively used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhang construction method which is one of the cast-in-place methods for concrete bridges.
In particular, the present invention relates to a movable form support device used for the erection and a moving construction method thereof.

[0002]

2. Description of the Related Art Conventionally, in a method of erection of a concrete bridge overhang, a so-called mobile work vehicle for erection (traveler) is installed at the top end of the bridge, and the erection girder is erected one block at a time on both sides. General.

FIG. 8 is a schematic side view showing an example of a conventional mobile work vehicle for erection (traveler).
The erection mobile work vehicle S includes a main frame 52 having a substantially parallelogram shape, and a main frame 52 disposed between an upper corner 63 and a lower corner 64 of the main frame 52 sandwiched between the holding cross beams 50 and 50. The main body is composed of a vertical member 51, a rear cross beam 53 that locks a rear corner 65 of the main frame 52, and a front corner 54 of the main frame 52 that suspends and supports the work scaffold 57 via the front cross beam 61. Then, the bridge A is erected on the work scaffold 57. The moving rail 55 moves forward of the pier A when the erection work vehicle S composed of the holding cross beams 50 and 50, the main frame 52, and the like is lifted by the jack 67 provided in the vicinity thereof. After the mounting work vehicle S is mounted on the moving rail 55 again, the mounting mobile work vehicle S is pulled forward by the jack 56 provided at the tip of the moving rail 55. Thus, the mobile work vehicle S for erection can be moved forward of the bridge A in the middle of erection. In other words, the construction mobile work vehicle S located at the tip of the overhang plays a role of a scaffold and a supporter, and moves the construction mobile work vehicle S forward each time the construction of one construction block girder B is completed. It is.

[0004]

However, the above-mentioned conventional mobile work vehicle for erection (traveler) is configured to be installed at the front end of the bridge upper surface, and this becomes an obstacle, so that it becomes an obstacle to the construction section at the front end. There was a problem that the supply of materials such as reinforcing bars, formwork, PC steel, and equipment could not be performed smoothly.

In order to solve the above-mentioned problems, the present invention employs a method in which a conventional mobile work vehicle (traveler), which is a movable form support device, is supported and moved on the lower surface of the bridge, and thereby the upper surface of the bridge is moved. It was developed to be used effectively as a work yard.

[0006]

In order to achieve the above object, according to the present invention, a movable form support device for erection of a bridge is constituted as follows. First, a rail body provided with a scaffold was provided below the existing girder via a movable and vertically movable supporting and fixing means. Under the existing girder on the rail body, a support body provided with a scaffold and a formwork having a height adjusting means is provided via a movable and movable supporting and fixing means. In this way, the rail body and the support body are movably engaged with each other via the moving means, thereby forming a movable form supporting apparatus for erection.

The means for supporting and fixing the rail body preferably comprises a reaction force jack to the existing girder and a suspension anchor jack. However, the present invention is not limited to this configuration, and a quick lock mechanism that can be locked only by inserting an anchor bolt may be provided at a predetermined position below the block girder.

Further, it is preferable that the support fixing means of the support body comprises a reaction force jack to the existing girder and a suspension anchor. However, the present invention is not limited to this configuration, and a quick lock mechanism that can be locked only by inserting an anchor bolt may be provided at a predetermined position below the block girder.

Preferably, the means for adjusting the height of the mold comprises a jack provided on the support body.
However, the present invention is not limited to this configuration, and a device capable of finely adjusting the elevating and lowering of the formwork may be provided on the support body.

Preferably, the moving means comprises a sliding device having a driving means. However, the present invention is not limited to this configuration, and may be configured by an LM guide type moving mechanism.

Next, the construction of the bridge is carried out through the following steps by using the movable form supporting apparatus for construction having the above-mentioned construction. <1> For erection of the construction described above, the formwork is received under the existing girder in front of the erection point at a predetermined position below the existing girder on both sides near the bridge capital (in the case of arch ribs, one side of the arch abutment). A step of installing a movable form support device via each support and fixing means in the device. (Connectors corresponding to the respective supporting and fixing means of the device are provided in advance at predetermined positions below the existing girder and under the girder for each block to be bridged.) <2> Rail body supporting and fixing means in the device Releasing the rails and allowing the support body of the device to support the rail body. <3> The rail body is moved through moving means in the device,
A step of moving by a predetermined distance in the direction of the erection point; <4> A step of fixing the rail body to a connecting portion below the existing girder provided in advance via a rail body support fixing means. <5> a step of releasing the support fixing means of the support body in the device and supporting the support body on the rail body. <6> The supporting body is moved through a moving means in the device,
A step of moving by a predetermined distance in the direction of the erection point; (In this state, the formwork provided on the support body is set immediately below the erection point.) <7> The rail body and the support body are moved downward by the girder by means of the rail body supporting and fixing means. To a predetermined distance. <8> The support body is fixed to a connection portion below the existing girder provided in advance through support and fixing means of the support body, and a formwork set immediately below the erection point is provided on the formwork. The height is adjusted by the height adjusting means, and the reinforcing steel, formwork and the like to be erected are assembled to the erection point by the lifting device provided on the existing girder. In this way, the concrete is poured, and after the concrete strength is generated, the PC steel material provided on the block girder is tensioned and fixed to inject the grout material. <9> Step of returning to the step <2> and repeatedly extending and erection.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 is a schematic side view showing an example of a movable form support device for erection according to the present invention.
Is a schematic cross-sectional view of the device of FIG. 1 viewed from the direction D, and FIG.
It is explanatory drawing of the moving means shown to FIG. 1 and FIG. 2, (a)
Is a schematic side view thereof, and FIG. 2 (b) is a schematic front view thereof.

First, referring to FIGS. 1 and 2, the entire construction of a movable form support device for erection according to the present invention will be described. The figure shows a state in which a movable form supporting apparatus G for erection according to the present invention is installed at a predetermined position below the existing girder 10. The movable formwork supporting device G for erection is provided with a work scaffold 14 provided with a rail 13 and a safety fence supported and fixed by a suspension anchor jack 11 and a reaction force jack 12 at a predetermined position below the existing girder 10. And a height adjusting jack 1 supported and fixed at a predetermined position below the existing girder 10 on the rail body 15 by a suspension anchor 16 and a reaction force jack 17.
8 and a supporting body 21 made of a frame member such as steel provided with a work scaffold 20 provided with a safety fence,
A wheel mechanism 22 having a drive unit (not shown) is used and is configured to be movably engaged with each other. The upper portion of the support body 21 is inclined so as to correspond to the shape below the girder, and the mold 19 and the jack 18 for adjusting the height of the mold 19 are formed.
As shown in FIG. 2, the frame portion 21a is provided with a frame floor having a fence and extending horizontally in the left-right direction, and a corner 28 of the frame floor has a cantilever-side formwork. Shoring and work scaffolding are provided. The work scaffold 14 provided on the rail body 15 and the work scaffold 2 provided on the
Numerals 0 are independently installed on the rail body 15 and the support body 21, respectively. The height adjusting jacks 18 of the formwork 19 are arranged to receive the reinforcing steel and concrete at the place where they are to be driven, and at predetermined positions below the existing girder 10 and the reinforcing steel block 23 to be erected, The connecting portions 24, 24A corresponding to the hanging anchor jacks 11 of the body 15 (connecting portions during forward movement),... And the connecting portions 25, 25A corresponding to the hanging anchors 16 of the support body 21 (when moving forward). Are provided.

Next, referring to FIG. 3, a description will be given of a wheel mechanism which is a moving means of the movable form supporting apparatus G for erection. As shown in the drawings (a) and (b), wheels 30 and 31 are provided below the support body 21 via a mounting member 29, and the wheels 30 are made of I-shaped steel provided on the rail body 15. To move on the rail 13
Is a so-called monorail type which moves while sandwiching the rail 13. That is, the support body 21
However, the support body 21 is configured to be freely movable on the rail body 15 and the support body 21 is configured to be able to suspend and support the rail body 15. Although not shown, the wheel mechanism 2
2 is moved by driving means such as a chain block, a lever block, and a jack cylinder.
Of course, a part of the wheel mechanism 22 may be a drive wheel, or may be a rack and pinion type. Although not shown, the rail body 15 or the support body 21 has
Movement control means for the wheel mechanism 22 is provided so that the wheel mechanism 22 stops at a predetermined distance. The movement control means is a combination of a sensor and a mechanical stopper. Furthermore, to prevent danger, a mechanical stopper
3 can be provided at the end.

Next, referring to FIGS. 4 to 7, the procedure of moving the erection movable form supporting apparatus G shown in FIG. 1 will be described. FIG.
Is an explanatory view showing a moving construction procedure (1) to (2) of the mobile form support device G for erection of FIG. 1, and FIG. 5 is a moving construction procedure (3) to (4) following FIG. FIG. 6 is an explanatory view showing FIG.
Explanatory drawing which shows the moving construction procedure (5)-(6) following FIG. 7, FIG.
FIG. 7 is an explanatory view showing the moving construction procedures (7) to (8) following FIG. 6. In this description, the erection of one side of the bridge will be described, and the illustration of the work scaffolds 14 and 20 during movement will be omitted. (1) [Setting the movable form supporting device G for installation below the existing girder 10] A rail body 15 provided with a work scaffold 14, a form 19 at the top end, and a jack for adjusting the height of the form 19 A movable form support device G for erection, which is composed of a support body 21 provided with a working scaffold 20 provided with 18, is set at a predetermined position below the existing girder 10. (The rail 15 is connected to the connecting portion 2 below the existing girder 10.
4 hanging anchor jack 11 and reaction force jack 12
The support body 21 is fixed by the existing girder 10.
It is supported and fixed by the suspension anchor 16 from the lower connecting portion 25 and the reaction force jack 17. At this time, the formwork 19 receives the leading girder of the existing girder 10. (2) [Release of Rail Body 15] The anchor bolt 11a and the suspension anchor jack 11 are detached from the connecting portion 24 below the existing girder 10, and the reaction force jack 12 is released.
To support. (3) [Movement of Rail Body 15] The rail body 15 is moved forward by a predetermined distance along the rail 13 via the wheel mechanism 22. (4) [Fixing of Rail Body 15] The anchor bolt 11a and the suspension anchor jack 11 are fixed to the existing girder 10 from the connecting portion 24A below the existing girder 10, and the reaction force jack 12 is extended below the existing girder 10,
The rail body 15 is fixed at a predetermined position below the existing girder 10. (5) [Release of the support body 21] The anchor bolt 16a and the suspension anchor 16 shown in FIG. 4 (1) are removed from the connecting portion 25 below the existing girder 10, and the reaction force jack 17 is released to release the rail body 15 The supporting body 21 is supported. (6) [Movement of the support body 21] The support body 21 is moved forward by a predetermined distance along the rail 13 via the wheel mechanism 22. (7) [Overall Lifting of the Mobile Form Support System G for Construction] The rail body 15 and the support structure 21 are raised by the suspension anchor jack 11 by a predetermined distance in the lower direction of the girder. (8) [Fixing the support body 21 and placing concrete on the erection girder] The crane vehicle 27 or the like provided on the existing girder 10 shown in FIG. , Anchor bolt 16a and suspension anchor 1
6 is fixed to the existing girder 10 from the connecting portion 25A below the existing girder 10, the reaction force jack 17 is extended below the existing girder 10, and the support body 21 is fixed at a predetermined position below the existing girder 10. Then, the formwork 19 set immediately below the erection point H is adjusted by the height adjusting jack 18 of the formwork 19 to receive the lower part of the reinforcing bar block 23. Thus,
Concrete is poured into the reinforcing bar block 23, and a PC steel material provided on the reinforcing bar block 23 is tensioned and fixed, and a grout material is injected. As described above, the erection work of one block girder is completed.

[0016]

Since the present invention is configured as described above, it has the following effects. {1} The movable formwork support device for erection according to the present invention
Since it is installed on the lower surface of the bridge, the upper surface of the bridge can be effectively used. {2} By using the movable form support device for erection according to the present invention, when the amount of concrete to be poured is the same, the span of the beam of the support is shorter in this method than in the conventional method. It is possible to reduce the cross-sectional dimension and thus reduce the weight. {3} The conventional type of traveler requires several forms of suspension from the top to the bottom of the bridge to suspend the formwork and the scaffolding, but this is not necessary with the mobile formwork support device for erection according to the present invention. Becomes {4} In the conventional type of traveler, it is common to hang a roof on the traveler, but in the present invention, since the work is performed on the lower surface of the bridge, the roof is not required. {5} Due to the above {2} to {4}, the weight is reduced and the cost is reduced as compared with the conventional method. {6} According to the present invention, the upper surface of the bridge can be effectively used, so that the construction of the reinforcing bars can be promoted, and as a result, the construction period can be shortened.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an example of a movable form support device for erection according to the present invention.

FIG. 2 is a schematic cross-sectional view of the device of FIG. 1 viewed from a direction D.

3A and 3B are explanatory views of the moving means shown in FIGS. 1 and 2, wherein FIG. 3A is a schematic side view and FIG. 3B is a schematic front view.

FIG. 4 is an explanatory view showing moving construction procedures (1) and (2) of the erection movable form support apparatus G of FIG. 1;

FIG. 5 is an explanatory diagram showing a moving construction procedure (3) to (4) following FIG. 4;

FIG. 6 is an explanatory view showing a moving construction procedure (5) to (6) following FIG. 5;

FIG. 7 is an explanatory view showing a moving construction procedure (7) to (8) following FIG. 6;

FIG. 8 is a schematic side view showing an example of a conventional mobile work vehicle for erection (traveler).

[Explanation of symbols]

10 ··· Existing girder 11 · · · hanging anchor jack 11a · · · anchor bolt (for rail body 15) 12 · · · reaction force jack (for rail body 15) 13 · · · rail 14 · · · ··· Work scaffold (for rail body 15) 15 ··· Rail body 16 ··· Hanging anchor 16a ··· Anchor bolt (for supporting body 21) 17 ··· Reaction force jack (for supporting body 21) ········ Height adjustment jack (for formwork 19) 19 ··· Formwork 20 ··· Work scaffold (for support body 21) 21 ··· Support body 21a Frame part 22 Wheel mechanism 23 Reinforcement block 23a Reinforcement suspension frame 24 Connection part (corresponding to suspension anchor jack 11) 24A Connection part (suspension anchor jack 11) 25) Connection part (corresponding to suspension anchor 16) 25A Connection part (corresponding to forward movement of suspension anchor 16) 26 worker 27 crane truck 28 corner (cantilever side) Formwork, shoring, work scaffolding, etc.) 29 ··· Mounting members 30 ··· Wheels 31 ··· Wheels 50 ··· Cross beams for holding 51 ··· Vertical members of main frame 52 ·・ ・ ・ Main frame 53 ・ ・ ・ ・ ・ ・ Rear cross beam 54 ・ ・ ・ ・ Point corner 55 ・ ・ ・ ・ Movement rail 56 ・ ・ ・ ・ Jack 57 ・ ・ ・ ・ Work scaffold 58 ・ ・ ・ ・ Handrail 59 ・ ・··· Roof 61 ·················································································· 67 ··· Jack A · · · Bridge B · · · · construction block girder G · · · · mobile for construction Formwork shoring device H ... Erecting point S ... Equipment mobile work vehicle (traveler)

Claims (6)

[Claims] 1. A rail body provided with a scaffold, provided below a pre-existing girder via a movable and vertically movable support and fixing means,
A support body provided below the existing girder on the rail body via a movable and movable support and fixing means, and provided with a scaffold and a form having height adjusting means, is connected to each other via the moving means. A movable form support device for erection of a bridge that is movably engaged. 2. The mobile form support apparatus for bridge construction according to claim 1, wherein the means for supporting and fixing the rail body comprises a reaction force jack to an existing girder and a suspension anchor jack. 3. The movable form support system for erection of a bridge according to claim 1, wherein the support fixing means of the support structure comprises a reaction force jack to an existing girder and a suspension anchor. apparatus. 4. The movable bridge type bridge according to claim 1, wherein the height adjusting means of the formwork comprises a jack disposed on the support body. Formwork support equipment. 5. The apparatus according to claim 1, wherein said moving means comprises a sliding device provided with a driving means. 6. A moving construction method of a movable form support device for erection of a bridge, comprising the following first to ninth steps. (1) The said form so that a formwork may receive under the existing girder in front of a construction point at a predetermined position under the existing girder on both sides near the bridge capital (in the case of an arch rib, one side of the arch abutment). A first step of installing the movable form support apparatus for erection of a bridge according to any one of the above, via each supporting and fixing means in the apparatus. (Connecting portions corresponding to the respective supporting and fixing means of the device are provided in advance at predetermined positions below the existing girder and the girder for each block to be bridged.) (2) Supporting and fixing means for the rail body in the device A second step of releasing the rail and supporting the rail body on the support body in the apparatus. (3) moving the rail body through a moving means in the apparatus;
A third step of moving a predetermined distance toward the erection point. (4) A fourth fixing means for fixing the rail body to a connecting portion below the existing girder provided in advance via means for supporting and fixing the rail body.
Process. (5) A fifth step of releasing the support and fixing means of the support body in the apparatus, and causing the rail body to support the support body. (6) moving the support body through a moving means in the device;
A sixth step of moving a predetermined distance toward the erection point. (In this state, the formwork provided on the support body is set immediately below the erection point.) (7) The rail body and the support body are moved downward by the girder by the rail body supporting and fixing means. 7
Process. (8) The support body is fixed to a connection portion below the existing girder provided in advance through a support fixing means of the support body, and a formwork set immediately below the erection point is provided on the formwork. The height is adjusted by the height adjusting means, and the reinforcing steel, formwork and the like to be erected are assembled to the erection point by the lifting device provided on the existing girder. An eighth step of placing concrete, waiting for the concrete strength to occur, tensioning and fixing the PC steel material provided on the block girder, and injecting the grout material. (9) Returning to the second step, a ninth step of repeatedly extending and erection.