JP4057763B2 - Segment supply method when laying gas pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
When laying a gas pipe in a tunnel excavated by a shield excavator, the gas pipe can be supplied to the shield excavator without interrupting the tunnel excavation by the shield excavator. It relates to the segment supply method.
[0002]
[Prior art]
Conventionally, when gas pipes are laid in underground tunnels, after excavating the tunnel with a shield excavator, a certain length of gas pipe should be sequentially carried into the tunnel and then laid on the gas pipe previously laid A long gas pipe is formed by repeatedly performing the operation of welding the gas pipes facing the butted state and welding between the butted end faces. Therefore, the outer diameter of the shield excavator is determined by the space required for carrying in and welding the gas pipe, but when performing the shield excavation work and the gas pipe laying work at the same time in the excavated narrow tunnel, It is impossible to carry in materials such as segments to the shield excavator side, and the carrying-in work becomes difficult due to the existence of a laid gas pipe.
[0003]
[Problems to be solved by the invention]
Therefore, it is impossible to lay the gas pipe on the rear side while digging the tunnel with the shield excavator, and the gas pipe laying design line is drawn in advance by the tunnel excavator at the location where the gas pipe is laid. The current situation is that the tunnel is excavated, and then the gas pipe is carried into the tunnel and connected in sequence, which has the problem that the construction period is long and the construction cost is high. In particular, in recent years, long-distance construction has been carried out, and laying gas pipes waiting for excavation of long tunnels requires a significant work period.
[0004]
On the other hand, a gas pipe can be laid on one side of the bottom surface in the tunnel excavated by the shield excavator, and the segment can be carried in using the space on the other side. During the laying work, the carry-in passage is blocked by the presence of welding equipment, etc., and it becomes impossible to carry in the segment to the shield excavator, and during that time, the excavation work by the shield excavator has to be interrupted, The problem is that the construction period is significantly delayed.
[0005]
The present invention has been made in view of such problems, and the object of the present invention is to enable the supply of segments to the shield excavator side even during the laying operation of the gas pipe, It is another object of the present invention to provide a method for supplying a segment that enables the tunnel digging and the lining work of the segment to the excavated wall surface to be performed efficiently.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the segment supply method of the present invention at the time of laying a gas pipe, a segment stock portion is provided in a tunnel excavated by a shield excavator as described in claim 1, and this segment stock portion is provided. A first rail for traveling the segment transport carriage is laid on one side of the bottom surface of the tunnel from the rear to the other side of the bottom surface of the tunnel from the segment stock portion to the gas pipe laying location in parallel with the first rail. When laying a second rail for traversing the side of the segment from the segment transporting carriage, and laying the gas pipe at the gas pipe laying position behind the segment stock portion in this state according to the progress of the shield excavator advance, segment a plurality of segments conveyance carriage loaded with segments from the start wellhead side of the shield excavator The segments on the segment transport carriage are sequentially transferred to the horizontal carriage that runs to the rear vicinity of the tostock section, stops at this position, and runs on the second rail. After the segment is loaded into the stock section and a plurality of segment transport carts loaded with segments are sent to the rear of the segment stock section, the cart equipped with the gas pipe is moved over the first rail. It is made to travel, it is carried to a laying place , and the segment of a segment stock part is supplied in a shield excavator during this gas pipe laying operation.
[0007]
In the method of supplying the segments constitute the segment stock portion from the roller conveyor, and configured to advance together with the shield excavator integrally connected to the roller conveyor at the rear end of the shield excavator.
[0008]
[Action and effect]
While excavating the tunnel with the shield excavator, the excavated wall surface is assembled in a ring shape by the elector within the rear end of the shield excavator, and the next excavation is advanced by the shield excavator while taking the reaction force against the assembled segment The gas pipe is laid in the tunnel lined with segments. To carry the segment to the shield excavator side, the traveling rail of the segment transport carriage is laid on one side at the bottom of the tunnel, and the gas pipe is laid on the other side along the gas pipe. This can be done by running the segment transport carriage on the rail.
[0009]
A segment stock section is provided in the tunnel at the rear of the shield excavator at the transport end of the segment transport cart. The segment loaded by the segment transport cart is loaded on this segment stock cart, and the shield excavator The segments are sequentially supplied from the segment stock portion into the shield excavator as they are excavated for a certain length, and are assembled into a ring shape by an elector as described above, and tunnel lining is performed.
[0010]
When a tunnel corresponding to the length of the gas pipe is excavated by the shield excavator, and when performing a gas pipe laying operation of connecting a new gas pipe by welding to the gas pipe previously laid behind the segment stock part, Prior to this gas pipe laying work, the segment for the gas pipe laying work in the segment stock section, that is, the number of segments necessary for digging the shield excavator during the gas pipe laying work and lining the excavated wall surface And the segments are sequentially supplied to the shield excavator during gas pipe laying work.
[0011]
In this way, during the laying operation of the gas pipe, a large number of segments stocked in the segment stock section behind the shield excavator are supplied to the erector side provided in the rear end of the shield excavator. Even during the laying operation, the shield excavator can be efficiently carried out without interrupting the excavation of the shield excavator, the assembly of the segments, and the lining process, and the entire construction period can be greatly shortened.
[0012]
At this time, a plurality of transport carts loaded with segments together with the above-mentioned many segments stocked in the segment stock section are sent to the rear of the segment stock section, and during the gas pipe welding operation, the segment stock section Corresponding to the gas pipe laying work, the excavation of the shield excavator, the assembly of the segment, and the lining work are carried out by sequentially transferring the segments on the transport carriage to the segment stock section in response to the supply of the segments to the erector side. And can be performed smoothly.
[0013]
The segment stock section is composed of a roller conveyor that is integrally connected to the rear end of the shield excavator and moves forward with the shield excavator. The segment can be automatically transferred to the front end side of the roller conveyor 13 automatically on the roller conveyor, and the segments can be smoothly and efficiently supplied from the roller conveyor to the erector in the shield excavator. It is something that can be done.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a simplified cross-sectional view inside a tunnel from a shield excavator 1 excavating a tunnel T to a location where a gas pipe P is laid, FIG. 2 is a longitudinal side view in the tunnel portion behind the rear end barrel portion of the shield excavator 1, and FIG. 3 is a cross-sectional view thereof. In these drawings, the shield excavator 1 is segmented in the rear end barrel portion 1a. An erector 3 for assembling 2 in a ring shape is provided.
[0015]
In the tunnel T excavated by the shield excavator 1, a segment of a predetermined length from the rear end body portion 1 a of the shield excavator 1 is supplied to a segment stock portion 5 for supplying the segment 2 to the shield excavator 1. A traveling rail 7 for the segment transport carriage 6 is laid on one side of the bottom surface of the tunnel T between the segment stock portion 5 and the starting pit (not shown) of the shield excavator 1. On the other side of the bottom surface of the tunnel T from the segment stock portion 5 to the gas pipe laying location in parallel with the traveling rail 7, there are a horizontal carriage 8 and a gas pipe that intercept the segment from the segment conveying carriage 6. A rail 10 for traveling with a plurality of piping carts 9 equipped with various equipment necessary for laying is laid, and the horizontal carriage 8 is segmented with respect to the piping cart 9 It is arranged on the ment stock part 5 side so as to travel on the traveling rail 10. In the following description, the traveling rail 7 of the segment transport carriage 6 is the first rail, and the traveling rail 10 of the horizontal carriage 8 and the piping carriage 9 is the second rail.
[0016]
Further, in the center of the top wall of the tunnel T above the segment stock portion 5, the rear end body portion 1a of the shield excavator 1 is located above the front end portions (terminal portions) of the first and second rails 7 and 10. A single girder 11 made of H-shaped steel is supported so as to be movable in the tunnel length direction, and the front end of the girder 11 is opened at the rear end of the rear end body 1a of the shield excavator 1. It is comprised so that it may be connected with the upper end in and may be advanced integrally with the shield excavator 1. Reference numeral 4 denotes a segment suspension device composed of a chain block disposed on the beam 11 so as to be able to run. The segment suspension device 4 lifts the segment 2 from the horizontal carriage 8 and carries it into the segment stock section 5.
[0017]
Further, as shown in FIG. 3, on the segment stock portion 5, as shown in FIG. 12 is arranged, and a plurality of segments necessary for assembling one ring are stacked on the roller conveyor 12 sequentially from the front end portion to the rear end portion at small intervals. . In FIG. 2 and FIG. 3, there are six sets of loading segments S. Therefore, segment lining for six rings can be performed.
[0018]
As is well known, the shape of the segment 2 is formed by connecting flat frame plate side frames 2c and 2c of a fixed length between both ends of the front and rear frame portions 2a and 2b that are curved in an arc shape. It is formed in a flat rectangular frame having a constant arc length that is curved, and a skin plate 2d is stretched on the outer peripheral surface of this frame.In this embodiment, a steel segment is adopted, It may be a concrete segment.
[0019]
As shown in FIGS. 4 and 5, the segment transport carriage 6 traveling on the first rail 7 is a planar rectangular carriage provided with wheels 6 c that roll on the first rail 7 at the front and rear portions of the lower surface. It consists of a main body 6a and front and rear vertical walls 6b and 6b of a fixed height standing at the front and rear end portions of the upper surface of the truck body 6a with a distance substantially equal to the arc length of the segment 2, and the width of the carriage body 6a is The first rail which is shorter than the width between the front and rear frame portions 2a and 2b of the segment 2 and which is laid on one side of the bottom surface of the tunnel T without being obstructed by the gas pipe P laid on the other side of the bottom surface in the tunnel T 7 is configured to be able to travel on. Further, both sides between the front and rear vertical walls 6b, 6b are fully opened in the tunnel width direction so that the segment 2 can be exchanged smoothly.
[0020]
On the other hand, as shown in FIGS. 6 to 8, the preloading carriage 8 that travels on the second rail 10 has a planar rectangular shape in which wheels 8 c that roll on the second rail 10 are provided at the front and rear portions of the lower surface. A cart body 8a, a pivot receiving frame 8b disposed on the cart body 8a, a horizontal arm 8e attached to the upper end of a lifting column 8d erected on the rear end of the cart body 8a, It consists of a segment suspension 8f made of a hook fitting attached to the tip of the horizontal arm 8e, and this horizontal carriage 8 is configured to be self-propelled by a traveling motor 13 disposed on the front end surface. .
[0021]
The pivot receiving frame 8b is formed by integrally fixing U-shaped bottom frames 82 and 82 for accommodating the segment 2 to the front and rear portions of the rectangular frame 81 in which the segment 2 can be stored. A rectangular frame 81 is formed by a motor 84 that is pivotally supported on the upper ends of support columns 83, 83 that are erected on the front and rear portions of the cart body 8a at the center of the carriage, and that is installed on the front end portion of the cart body 8a. It can be reciprocated from a vertical state to a horizontal state.
[0022]
Further, the lifting column 8d is housed in a fixed cylinder 85 erected on the rear end portion of the cart body 8a so that the lower part thereof is vertically extendable and retracted along the rear surface of the lifting column 8d. It is configured such that it can be expanded and contracted in the vertical direction by a jack 86 standing and fixed on 8a.
[0023]
Next, a method for carrying the segment 2 from the starting pit to the segment stock section 5 behind the shield excavator 1 using the segment conveying carriage 6, the horizontal carriage 8 and the suspension support device 4 configured as described above will be described. At the start pit side, a plurality (three in the figure) of segments 2 are arranged on the carriage body 6a of the transport carriage 6, with one frame 2a curved in an arc shape facing downward and both side frames 2c, 2c. The inner peripheral surface curved in the front-rear direction and in an arc shape is directed toward the excavation wall surface of the tunnel T, and is stacked and placed between the vertical walls 6b and 6b in the width direction of the carriage body 6a. . After a plurality of transport carts 6 loaded with a plurality of segments 2 are connected in series in this way, the transport is carried on the first rail 7 toward the segment stock section 5 on the shield excavator 1 side by the battery loco 14.
[0024]
In this embodiment, six segments 2 are covered with one segment for one ring, and twelve transport carts loaded with three segments 2, that is, six segments can be covered. A carriage train is conveyed. The segment 2 is formed with a width of 1 m between the front and rear frame portions 2a and 2b constructed in the tunnel length direction.
[0025]
Since the transport carriage 6 traveling on the first rail 7 by the battery loco 14 is loaded with a plurality of segments 2 within the width of the carriage body 6a as described above, In spite of the presence of the gas pipe P already laid on the bottom of the side portion, it can be reliably conveyed in the narrow tunnel T as shown in FIGS. In FIG. 4, only one transport cart 6 is shown.
[0026]
When the segment transport carriage train travels to the end of the first rail 7 laid to the rear vicinity of the segment stock section 5, it stops at that position, and is taken by the preemptive carriage 8 waiting on the second rail 10. After the segments 2 loaded on the transport carts 6 are transferred onto the preloading cart 8, they are sequentially loaded onto the segment stock section 5 by the suspension device 4.
[0027]
Specifically, first, the horizontal carriage 8 is self-propelled with its rotation receiving frame 8b oriented in the vertical direction, and is placed on one conveyance carriage 6, and then the lifting column 8d is lifted by extending the jack 86. When the horizontal arm 8e at the upper end reaches above the height of the segment 2 placed on the transport carriage 6, the operator rotates the horizontal arm 8e horizontally above the transport carriage 6 by the operator. The segment hanging tool 8f is locked to the upper end portion of the inner segment 2 facing the preloading carriage 8. Next, the lifting column 8d is slightly raised to separate the lower surface of the segment 2 from the upper surface of the carriage body 6a of the transport carriage 6, and the horizontal arm 8e is rotated to the side of the horizontal carriage 8 as shown in FIGS. The segment 2 is housed in the pivot receiving frame 8b of the horizontal carriage 8 and placed in the U-shaped bottom frame 82 of the pivot receiving frame 8b in the same standing posture as the transport carriage 6.
[0028]
At this time, the space between the front and rear vertical walls 6b, 6b on the carriage main body 6a of the transport carriage 6 containing the segment 2 is fully opened toward the side carriage 8 while the side carriage 8 is pivotally received. Since the frame 8b is opposed to the transport carriage 6 side in the center in the length direction on the turning trajectory of the tip of the horizontal arm 8e, the horizontal arm 8e is rotated with the segment 2 slightly lifted. It is possible to simply and surely store it in the rotation receiving frame 8b of the horizontal carriage 8 simply by making it happen.
[0029]
In this way, when all the segments 2 on one transport carriage 6 are sequentially transferred into the rotation receiving frame 8b of the horizontal carriage 8 by the horizontal arm 8e, the horizontal carriage 8 is moved to the segment stock portion 5 as shown in FIG. It is allowed to self-propell on the second rail 10 up to the lower part of the rear end of the beam member 11 movably disposed in the center of the top wall of the tunnel T in the tunnel length direction. As shown in FIG. 10, the rotation receiving frame 8b is rotated 90 degrees to be in a horizontal state, thereby bringing the segment 2 into a stacked state in which the inner peripheral surface curved in a concave arc shape faces upward.
[0030]
In this state, the suspension device 4 composed of a chain block supported so as to be able to run on the girder 11 is moved to the rear end of the girder 11, and the segment on the rotation receiving frame 8b of the horizontal carriage 8 is moved. 2 is lifted, and then travels to the front end of the beam member 11 to suspend the segment 2 on the front end of the roller conveyor 12 as the segment stock portion 5, and has a concave arc shape as shown in FIGS. Is placed with the inner circumferential surface curved upward facing upward. Similarly, the segments 2 on the rotation receiving frame 8b are sequentially lifted by the suspension device 4, stacked on the previously loaded segments 2, and all (three) segments 2 are loaded onto the roller conveyor 12. After that, the horizontal receiving carriage 8 is placed next to the next segment conveying carriage 6 with the rotating receiving frame 8b in the vertical state, and again from the conveying carriage 6 into the rotating receiving frame 8b of the collecting carriage 8 by the same operation process as described above. After the segment 2 is transferred and the preloading carriage 8 is self-propelled to the segment stock section 5, it is carried onto the roller conveyor 12 by the suspension device 4.
[0031]
The loading and loading of the segment 2 on the roller conveyor 12 is performed so that the number of segments for two transport carts, that is, six necessary for assembling for one ring, is set as one set. The segments 2 from the carriage 6 are sequentially arranged on the roller conveyor 12 as six stacked segments S from the front end portion toward the rear end portion.
[0032]
The loading segment S on the roller conveyor 12 is supplied to the erector 3 from the loading segment S on the front end side as the shield excavator 1 advances, and is assembled in a ring shape in the rear end body portion 1a of the shield excavator 1. Line the excavation wall. When the stacking segment S on the front end portion of the roller conveyor 12 is used for tunnel lining, the next stacking segment S moves on the roller conveyor 12 to the front end side of the roller conveyor 12, and again, as described above, 1 It is assembled as a segment lining for the ring. In addition, whenever the shield excavator 1 excavates a tunnel of a fixed length, the 1st and 2nd rails 7 and 10 are added to the movement trace of the roller conveyor 12 which moves forward integrally with the shield excavator 1.
[0033]
Thus, every time the shield excavator 1 digs a certain length, the excavation wall surface is covered by the segment 2 assembled by the erector 3, and the shield excavator 1 excavates the tunnel corresponding to the length of the gas pipe P while the gas pipe. P installation work is carried out. During the laying operation of the gas pipe P, the segment transport carriage 6 cannot be run on the first rail 7 due to the presence of a welding machine or the like. A large number of segments 2 corresponding to the time required for welding the gas pipe are carried into the side. In other words, a plurality of (12 in this embodiment) transport carts 6 on which the loaded segments S are supplied in a full state on the roller conveyor 12 in the segment stock section 5 and the segments 2 are loaded are connected to the first rail 7. The rear end of the segment stock portion 5 is kept waiting on the end portion of the.
[0034]
After this state, a carriage (not shown) on which the gas pipe P is mounted is caused to travel on the first rail 7 from the starting pit by the battery loco 15 and, as shown in FIG. After carrying in to the front of the gas pipe P laid on the side, as shown in FIGS. 11 and 12, the pipe holder 16 is erected and fixed at predetermined intervals in the tunnel length direction. 16, the gas pipe P is moved across from the carriage, and the rear end face of the gas pipe P is joined to the front end face of the existing gas pipe P previously laid, while waiting on the second rail 10. The plurality of piping carriages 9 are moved to the front part of the gas pipe P.
[0035]
This piping carriage 9 is necessary for welding work such as a welding head 20, gas pipe clamping means (not shown), welding cable 21, welding guide rail 22, welding control equipment 23, gas cylinder 24, etc. as shown in FIG. Various devices are mounted, and these devices, equipment, and the like are attached to and connected to the joints between the gas pipes for welding work.
[0036]
According to this method, the tunnel excavation by the shield excavator 1 and the segment lining operation on the excavation wall surface are stopped in parallel with the piping of the gas pipe P and the welding operation. That is, during the piping of the gas pipe P and the welding operation, the segment 2 from the plurality of sets of loaded segments S loaded on the roller conveyor 12 is placed in the rear end body portion 1a of the shield excavator 1 as described above. Sequentially supplied to the erector 3 and constructed on the excavation wall surface while assembling one ring for every fixed tunnel excavation of the shield excavator 1, and the loading segment S on the roller conveyor 12 moves from the front end side to the erector 3 side. As supplied, the segment 2 on the transport carriage 6 on standby is sequentially loaded onto the rear end portion of the roller conveyor 12 by the side-drawing carriage 8 and the suspension support device 4 in the same manner as described above and used for segment lining. .
[0037]
In this way, even during the piping and welding of the gas pipe P, the tunnel lining work is performed by the segment while the shield excavator 1 is advanced, and when the welding work of the gas pipe P is completed, the segment 2 is placed on the roller conveyor 12. After all the transport carts 6 that have been emptied by retreating to the starting pit, the segments 2 are loaded again and carried to the segment stock section 5 behind the shield excavator 1, and the same as above. 8 and the suspension support device 4 are loaded onto the roller conveyor 12 and are sequentially supplied from the roller conveyor 12 to the erector 3 side. In the present invention, the laying of the gas pipe has been described. However, the present invention can also be applied to the laying of a pipe body such as a water pipe other than the gas pipe.
[Brief description of the drawings]
FIG. 1 is a simplified cross-sectional view inside a tunnel from a shield excavator to a gas pipe laying position,
FIG. 2 is a vertical side view of the segment stock section in the tunnel,
FIG. 3 is a cross-sectional view thereof,
FIG. 4 is a cross-sectional view showing the relationship between the laid gas pipe and the travel position of the segment transport carriage;
FIG. 5 is a side view of a segment transport cart,
FIG. 6 is a side view of a preloading carriage,
FIG. 7 is a simplified front view of a segment conveyance carriage and a pre-stage carriage;
FIG. 8 is a plan view thereof.
FIG. 9 is a side view of the suspension support device and the side carriage,
FIG. 10 is a front view thereof.
FIG. 11 is a plan view of a joint portion between gas pipes;
FIG. 12 is a longitudinal front view thereof,
FIG. 13 is a partially cutaway perspective view for explaining a welding operation of a gas pipe joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shield excavator 2 Segment 3 Electa 4 Suspension support device 5 Segment stock part 6 Segment conveyance trolley 7 First rail 8 Horizontal trolley 9 Piping trolley
10 Second rail
12 Roller conveyor P Gas pipe S Loading segment T Tunnel

Claims (1)

A segment stock unit consisting of a roller conveyor is integrally connected to the rear end of the shield excavator so as to move forward together with the shield excavator. A second rail for traveling on a side-by-side carriage that lays one rail on the other side of the bottom surface of the tunnel from the segment stock portion to the gas pipe laying location in parallel with the first rail. In this state, when laying gas pipes at the gas pipe laying location behind the segment stock portion according to the progress of the shield excavator , a plurality of units loaded with segments from the start pit side of the shield excavator in advance Drive the segment transport carriage to the vicinity of the rear of the segment stock section and stop at this position. The segments on the segment transport carriage are sequentially transferred to the pre-stage carriage traveling on the second rail, and the segments are loaded into the segment stock section from the pre-stage carriage, and the segments are further loaded. After moving the multiple segment transport carriages to the rear of the segment stock section, the carriage equipped with the gas pipe is run on the first rail and carried to the laying place. During this gas pipe laying work A segment supply method for laying a gas pipe, characterized in that a segment of a segment stock section is supplied into a shield excavator.

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