JP2016020609A - Construction method and construction structure of tunnel for pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely connect and lay a pipeline even if a tunnel is a small diameter while shortening a construction period by simultaneously executing boring of the tunnel and laying of the pipeline.SOLUTION: The inside of a tunnel 3 is divided into an upper space 5 and a lower space 6 by a sleeper. A carrying carriage 10 mounted with materials such as a segment is carried on a rail 8 installed in the upper space 5, and a gas pipe 12 is inserted into the lower space 6 by an FT method. After welding an additional pipe 12A and a previously laid pipe 12 in a shaft 2, the gas pipe 12 is pushed in the lower space 6 in response to progress of boring of the tunnel 3. The gas pipe 12 is carried in the lower space 6 by buoyancy of water. On the outside of the upper space 5, attaching-detaching rail 8b is provided on a traverser 25 movable in the crossing direction with the lengthwise direction of the gas pipe 12. The attaching-detaching rail 8b is removed from a welding part 24 when welding the gas pipe 12, and is connected to the rail 8 when carrying in the materials, and is carried by the carrying carriage 10 by interrupting welding.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a construction method and construction structure for a tunnel for piping in which piping such as a gas pipe is laid in the tunnel according to the progress of excavation while excavating the tunnel.

  Conventionally, as a long structure laying apparatus in which a tunnel is formed using a shield excavation method using a shield excavator and piping is installed in the tunnel, those described in Patent Documents 1 and 2, for example, are known. ing. According to the underground transport method described in Patent Document 1, the shield segment and the transport pipe are held by the support member in the tunnel tunnel and moved on the rail by the carriage main body. Then, by moving the support member up and down in the tunnel, the material necessary for shield digging and the piping to be laid are supported or released, and the piping such as the gas pipe is connected simultaneously with the shield digging.

Further, according to the gripping and laying device described in Patent Document 2, a horizontal frame is provided in a shield tunnel constructed by a shield method, the tunnel is divided into an upper stage and a lower stage, and a track provided in the upper conveyance path is provided. The transporter travels, transports the water conduit to the front side of the transport path, and temporarily places it on the lower stage.
Then, the water guide pipe temporarily placed is held by the holding arm of the attachment mechanism provided at the lower stage of the tunnel, moved to the front part of the water pipe previously laid on the rear side, and guided by the horizontal adjustment mechanism of the grip arm and the lifting cylinder. The position of the water pipe is adjusted, and the rear part of the additional water pipe is press-fitted into the front part of the water pipe that has been laid in advance. In this way, the water conduits are sequentially connected.

Japanese Patent No. 3466007 Japanese Patent Laid-Open No. 11-63296

However, in the underground transport method described in Patent Document 1, since the shield segment and the transport pipe are selectively transported by the support member of the cart body that travels in the tunnel, there is a drawback that it takes time for transport and the construction period becomes long. there were.
Moreover, in the long structure holding and laying apparatus described in Patent Document 2, a shield tunnel is first constructed by a shield method, and then the upper and lower stages of the tunnel are divided by a horizontal frame so that an upper conveyance path is formed. After the water conveyance pipe was conveyed forward by a traveling transporter and temporarily placed in the lower stage, the water conveyance pipe was press-fitted into the front portion of the water conveyance pipe previously laid by another attachment mechanism and fitted. For this reason, it is necessary to individually construct a shield tunnel by a shield excavator and the subsequent laying of a water conduit, which is complicated and takes a long period of time.

  Moreover, since the methods and apparatuses described in Patent Documents 1 and 2 are both methods of connecting piping such as transport piping and water conduits in the tunnel, a large work space is required in the tunnel, and a small diameter is required. It was difficult to connect pipes in the tunnel. For this reason, these techniques have the disadvantage that they cannot be used in small-diameter tunnels having a small inner diameter.

  The present invention has been made in view of such circumstances, and tunnel construction and pipe laying can be simultaneously performed to shorten the construction period, and pipes can be reliably connected even if the tunnel has a small diameter. It aims at providing the construction method and construction structure of the tunnel for piping which enabled laying.

The construction method of the tunnel for piping according to the present invention is such that the inside of the tunnel is divided into an upper space and a lower space by a partition plate, and the material for tunnel construction is transported by the carriage in the upper space and the piping is laid in the lower space. After the tunnel was dug and the pipe was laid in the lower space at the same time, the additional pipe added in the tunnel shaft was welded to the previously laid pipe, According to the progress of tunnel excavation, the piping is pushed into the lower space.
According to the present invention, after the additional pipe newly added in the tunnel shaft and the pipe laid earlier are welded, the added pipe is moved forward of the lower space according to the progress of the tunnel excavation. Since it is pushed in, tunnel excavation and pipe laying in the tunnel can be performed simultaneously, thereby shortening the construction period. Moreover, since the pipe is welded by the shaft, no welding space is required in the tunnel, and the pipes can be connected and laid smoothly even if the space in the tunnel and its lower space is minimal.

In addition, the outer space of the tunnel is provided with a traverser movable in a direction crossing the longitudinal direction of the pipe, and a track of a carriage mounted on the traverser, and an additional pipe to be added and a pipe laid first. In the welding process, it is preferable that the trajectory of the carriage is removed from the welded portion between the additional pipe and the previously laid pipe by the traverser.
If the track of the carriage is installed on the welded part, it becomes an obstacle to welding, so the trajector removes the track of the carriage outside the upper space from the welded part of the pipe, so that the pipe and the additional pipe can be set up. It can be welded in the pit and inserted into the lower space, and the track of the carriage does not get in the way during welding. As a result, even if the space of the tunnel or the lower space is small, the welding of the pipe and the insertion into the lower space and the transportation of the material such as the segment by the carriage into the upper space can be performed without difficulty.

In addition, the outer space of the tunnel is provided with a traverser that can move in the direction intersecting the longitudinal direction of the pipe, and a trajectory of a carriage placed on the traverser. In doing so, it is preferable that the welding of the pipe is interrupted and the traverser is moved so that the track of the carriage is continuous with the track in the upper space.
When materials such as tunnel segments are transported to the tunnel excavation area in the upper space by the bogie, the welding of the pipe is interrupted and the trajectory of the bogie is moved by the traverser so as to be continuous with the trajectory in the upper space. The material such as the segment by the cart can be easily transported.
As a result, welding of the pipe and insertion in the lower space and transportation of the material in the upper space by the carriage can be performed alternately without difficulty.

The construction structure of a piping tunnel according to the present invention is a construction structure of a piping tunnel in which the inside of the tunnel is divided into an upper space and a lower space by a partition plate, and is installed in the upper space of the tunnel from the vertical shaft. Welding to weld the track of the bogie that extends to the excavation area and carries materials for tunnel construction, and the pipe installed in the tunnel shaft and laid in the lower space of the tunnel and the additional pipe to be added A jig, an additional welded pipe, and a pushing means for pushing the previously laid pipe into the lower space are provided, and tunnel excavation and pipe insertion in the lower space are performed simultaneously.
According to the present invention, the pipe newly added in the tunnel shaft and the pipe laid earlier are welded, and the pipe added by welding is pushed forward in the lower space according to the progress of tunnel tunneling. As a result, tunneling and pipe laying in the tunnel can be performed simultaneously, thereby shortening the construction period.

Further, in the construction structure of the tunnel for piping described above, a traverser movable in a direction crossing the longitudinal direction of the piping is disposed outside the upper space of the tunnel, and a track of the carriage is installed on the traverser. When the additional pipe and the previously laid pipe are welded, the trajectory of the carriage is preferably removed from the welded portion between the additional pipe and the previously laid pipe by the traverser.
According to the present invention, when the additional pipe is welded to the pipe previously laid in the lower space, the trajectory of the carriage is held at a position away from the welded portion by the traverser, and the trajectory is moved when the segment is transported by the carriage. The carriage can be transferred into the upper space by being moved to a position where it is superimposed on the weld. Therefore, welding of piping, insertion into the lower space, and transportation of materials by the carriage into the upper space can be performed alternately.

  According to the construction method and construction structure of the tunnel for piping according to the present invention, the newly added pipe in the tunnel shaft is welded to the previously laid pipe, and the added pipe is adapted to the progress of tunnel tunneling. Since it is pushed out to the front of the lower space, tunnel excavation and pipe installation in the tunnel can be performed at the same time, thereby shortening the construction period. In addition, pipe welding work is done in a vertical shaft and not in a tunnel, so pipes can be connected and laid smoothly according to tunnel tunneling even when the space in the tunnel and its lower space is minimal. You can work efficiently.

  In addition, according to the construction method and construction structure of a tunnel for piping according to the present invention, the tunnel has a small diameter to such an extent that the material for tunnel construction in the upper space can be transported by a carriage and the pipe in the lower space cannot be welded at the same time. However, the trajectory of the carriage can be shifted to a position deviated from the welded portion of the pipe by the traverser, and the pipe can be welded and pushed into the lower space. In addition, by interrupting the welding of the pipe, the traverser moves the track over the extension of the upper space, and the carriage loaded with materials for tunnel construction can be transported to the tunnel excavation area by the track. Therefore, even if the space in the upper space and the lower space of the tunnel is the smallest, by switching the position of the track with the traverser, it is possible to alternately carry the material and lay the piping.

1 is a side view of a tunnel shaft according to an embodiment of the present invention. It is sectional drawing orthogonal to the longitudinal direction which shows the upper space and lower space in the tunnel by embodiment of this invention. It is sectional drawing orthogonal to the longitudinal direction of the shaft side part of the tunnel by embodiment of this invention. It is a side view which shows the water stop mechanism by the side of a tunnel shaft. It is a front view which shows the water stop board of the lower space in the excavation area | region side part of a tunnel. The centering trolley | bogie which supports a gas pipe is shown, (a) is a front view, (b) is a side view. It is a top view which shows the positional relationship of the state which connected the new gas pipe to the gas pipe arrange | positioned in the tunnel entrance in a shaft, and the rail provided in upper space, and a traverser. (A)-(c) is a figure which shows the process of welding an additional gas pipe to the gas pipe laid previously by the shaft. (D)-(e) is a figure which shows the process of sending the welded gas pipe into the lower stage of a tunnel.

Hereinafter, a construction method and construction structure of a tunnel for a gas pipe according to an embodiment of the present invention will be described with reference to FIGS.
In the gas pipe tunnel construction structure 1 shown in FIG. 1, a shield tunnel 3 (hereinafter sometimes simply referred to as a tunnel 3) is installed on a wall surface 2 b of a shaft 2. The shield tunnel 3 is a tunnel formed by a shield construction method. The tunnel is excavated by a shield excavator (not shown) to dig the tunnel, and a segment 4 is attached to the surrounding soil wall at the rear portion to form a circle. The inner wall of the annular shield tunnel 3 is constructed in parallel.

  The shield tunnel 3 constructed by the shield method shown in FIGS. 2 and 3 divides a segment 4 having a circular cross section by a horizontal sleeper 7 as a partition plate, and has an approximately semicircular upper space 5 and a lower space 6 respectively. And form. In the upper space 5, for example, two sets of rails 8 and 9 are installed as tracks on the sleepers 7 constituting the conveyance path. On one set of rails 8, the transport cart 10 can carry materials such as segments 4, workers, etc., and transport them toward the shield excavation part on the tip side in the tunnel 3, while the other set of rails 9 is shielded. The succeeding carriage 10 equipped with a hydraulic unit of the excavator is transported.

1 to 3, in the lower space 6 of the shield tunnel 3, the gas pipe 12 is inserted by, for example, the FT method according to the progress of shield excavation. For this reason, water H is injected into the lower space 6 of the tunnel 3 and stored at a predetermined water level, its starting end protrudes into the shaft 2 and the lower space 6 is sealed liquid-tight by the water stop plate 13. It is stopped (see FIG. 3).
3 and 4, in the center of the water stop plate 13 provided on the start side, a cylindrical water stop mechanism 14 having a diameter larger than the outer diameter of the gas pipe 12 is disposed so as to protrude to the shaft 2 side. A ring-shaped water stop member 15 made of an elastic body made of rubber or the like in which an insertion hole 15 a having a diameter smaller than the outer diameter of the gas pipe 12 is attached to the distal end surface of the water stop mechanism 14.

In the vicinity of the shield digging portion in the lower space 6 in the tunnel 3, a digging-side water stop plate 17 is installed as shown in FIG. 5 to keep the water stored in the lower space 6 liquid-tight. The excavation side water stop plate 17 is fixed in a state where the lower water stop plate 17 a and the upper water stop plate 17 b are liquid-tightly connected by the guide plate 18. May be partitioned liquid-tightly.
Further, the tip of the gas pipe 12 is liquid-tightly sealed with a cap material so that water does not enter, thereby ensuring buoyancy. The lower space 6 is filled with water H in a region partitioned by the water stop plate 13 on the start side and the water stop plate 17 on the excavation side, and the gas pipe 12 floats on the inner water surface.

The water level of the water H in the lower space 6 is adjusted according to the amount of water discharged into the lower space 6 through the shaft 2 by a water pump and water hose (not shown) and drained by a water hose (not shown). 12 is adjusted so that the buoyancy works sufficiently and the movement is easy.
In FIG. 2, guide plates 34 are installed on both sides of the gas pipe 12 in the lower space 6, buffer bands 35 are affixed to the inside thereof, and buffer bands 35 are also applied to the lower surface of the sleepers 7 and the lower surface of the tunnel 3. Is affixed. The buffer bands 35 arranged on the upper, lower, left and right sides of the gas pipes 12 can prevent the gas pipes 12 floating in the water from being swung and damaged.

  Therefore, in the FT method, the gas pipe 12 inserted into the lower space 6 filled with water through the insertion hole 15a of the water stop member 15 on the starting side is floating with the water in the lower space 6, so that the gas pipe There is no frictional resistance between 12 and the lower space 6, and the gas pipe 12 can be inserted with a small pushing force. Further, the rear end portion 12a of the gas pipe 12 inserted into the lower space 6 protrudes liquid-tightly into the shaft 2 through the insertion hole 15a of the water blocking member 15, and the rear end portion 12a is a new additional gas. The tube 12A is positioned and supported by the tube temporary fixing jig 22 for welding with the tip of the tube 12A. The temporary tube fixing jig 22 and welding means (not shown) constitute a welding jig. Further, in FIG. 1, the welded portion between the tip end portion 12 b of the additional gas pipe 12 </ b> A and the rear end portion 12 a of the gas pipe 12 laid earlier is denoted by reference numeral 24.

In addition, air is supplied to the wind pipe provided in the upper space 5 from the turbo blower 20 on the ground by the air supply hose 21.
7 and 8, an electric winch 28 is fixed to the wall surface 2a of the shaft 2, and a wire 29 extending from the electric winch 28 is, for example, V-shaped via a pulley 30 and a retracting piece 31 installed on the opposite wall surface 2b. The lead-in hook 32 at the tip of the wire 29 is connected to the rear end of the additional gas pipe 12A. These constitute the pushing means 26.
Then, by pulling the wire 29 with the electric winch 28, the additional gas pipe 12 </ b> A after welding and the previously installed gas pipe 12 can be pushed into the lower space 6.

  Next, referring to FIGS. 1, 6, and 7, a mechanism for carrying in materials such as the segment 4 in the shaft 2 and a supply mechanism for the gas pipe 12 will be described. In FIG. 1, the additional gas pipe 12 </ b> A is suspended vertically by a crane or a winch (not shown) and placed on a plurality of centering carts 23 in a horizontal state at the bottom of the shaft 2. As shown in FIGS. 6A and 6B, the centering carriage 23 that supports the additional gas pipe 12A includes a substantially concave receiving portion 23a that supports the gas pipe 12A, and further includes a temporary pipe fixing jig. A height adjustment mechanism 23b and a lateral adjustment mechanism 23c are provided so as to be concentric with the rear end portion 12a of the gas pipe 12 supported by 22.

1 and 7, a known traverser 25 is disposed outside the upper space 5 of the shield tunnel 3, that is, on the side of the shaft 2, and a rail laid in the upper space 5 above the traverser 25. A detachable rail 8b is provided for connecting between the outer rail 8 and the outer rail 8a. The outer rail 8a is included in the rail 8.
Below the traverser 25, a guide track and a drive motor (not shown) are provided so that the traverser 25 can reciprocate in a direction perpendicular to the longitudinal direction of the gas pipe 12. A position at which the detachable rail 8b on the traverser 25 between the inner rail 8 and the outer rail 8a divides the rail 8 and the outer rail 8a, that is, the additional gas pipe 12A and the previously installed gas pipe 12 are welded. The position deviated from the part 24 and the position where the rail 8 in the upper space 5 is connected to the outer rail 8a can be selectively taken.

In addition, in the shaft 2, materials such as the segment 4 can be placed on the transport carriage 10 installed on the outer rail 8 a by a crane or the like, and these transport carriages 10 are placed in the outer rail 8 a and the upper space 5. When the rail 8 is continuous with the detachable rail 8b, it can be conveyed along the rail 8 into the upper space 5 of the shield tunnel 3.
In the state where the detachable rail 8b is moved to the position removed from the welded portion 24 by the traverser 25 in the shaft 2, the rear end portion 12a of the gas tube 12 provided with the additional gas pipe 12A in the lower space 6 and It can be welded by abutting at the welded portion 24.

The construction structure 1 of the gas pipe shield tunnel 3 according to the present embodiment has the above-described configuration. Next, a construction method of the gas pipe shield tunnel 3 will be described with reference to FIGS. 8 and 9.
In the shield tunnel 3 of the gas pipe 12 shown in FIG. 1, when the traverser 25 is driven, the detachable rail 8b on the traverse 25 is located in the upper space with respect to the longitudinal direction of the gas pipe 12 as shown by a two-dot chain line in FIG. 5 is held at a moving position deviated outwardly from the inner rail 8 and the outer rail 8a.

  In this state, the additional gas pipe 12A is suspended in the vertical shaft 2 with a crane or the like, for example, vertically and lowered, and the gas pipe 12A is inclined from the vertical state to the horizontal posture, as shown in FIG. Next, it is placed on the plurality of centering trolleys 23 in a horizontal state at the bottom of the shaft 2. Then, the wire 29 of the electric winch 28 of the pushing means 26 fixed to the wall surface 2a of the shaft 2 is bent into a U shape via the pulley 30 and the pulling piece 31, and the leading pulling hook 32 of the additional gas pipe 12A is bent. Connect to the rear end.

Then, the additional gas pipe 12A is moved to the welding position with the rear end portion 12a of the gas pipe 12 previously laid by the electric winch 28 and human power. The rear end portion 12a of the gas pipe 12 is held at a position that protrudes outward from the insertion hole 15a of the water stop member 15 by a predetermined distance.
And as shown in FIG.8 (b), the rear-end part of the gas pipe 12 which laid the front-end | tip part 12b of the additional gas pipe 12A previously by the height adjustment mechanism 23b and the horizontal adjustment mechanism 23c in each centering trolley | bogie 23 12a, and is welded and integrated at the welded portion 24 with a welding jig. After welding, the gas pipe 12 and the additional gas pipe 12A are inspected for welding defects by an X-ray apparatus and then painted.

  Next, as shown in FIGS. 8 (c) and 9 (d), by inserting the electric winch 28 and pushing in the additional gas pipe 12 </ b> A, the previously installed gas pipe 12 is inserted into the water stop member 15. It is pushed into the lower space 6 from the hole 15a. Since the inside of the lower space 6 is filled with water by the FT method, the pushed-in gas pipe 12 proceeds smoothly with a small resistance while floating on the water surface by buoyancy. Therefore, the gas pipe 12 and the additional gas pipe 12A (hereinafter simply referred to as the gas pipe 12) welded to each other can be advanced in the lower space 6 as the tunnel 3 is dug by the shield excavator.

Then, as shown in FIG. 9 (e), in the gas pipe 12, the pushing of the one-span gas pipe 12 is completed at the position where the rear end portion 12a protrudes outward from the insertion hole 15a of the water stop member 15 by a predetermined distance. Here, the tube temporary fixing jig 22 is installed to support the gas tube 12.
On the other hand, when the material such as the segment 4 is carried into the excavation region at the tip of the shield tunnel 3, the traverser 25 is moved in a direction perpendicular to the longitudinal direction of the gas pipe 12, and the detachable rail 8 b on the traverser 25 is moved to the outer rail. It moves to the position which connects 8a and the rail 8 in the upper space 5. FIG. In this state, a material such as the segment 4 is suspended on the transport carriage 10 by a crane or the like in the shaft 2 and placed on the outer rail 8a, and the transport carriage 10 is driven by a drive motor or the like (not shown). 8a is sent to the rail 8 in the upper space 5, and the material such as the segment 4 is carried out to the excavation area excavated by the shield excavator at the tip of the tunnel 3.

Then, after the carriage 10 passes through the outer rail 8a and moves to the rail 8 in the upper space 5, the traverser 25 is driven to disengage the detachable rail 8b from between the outer rail 8a and the rail 8 in the upper space 5. Move to position. Then, the detachable rail 8b on the traverser 25 moves in a direction away from the gas pipe 12 with respect to the rail 8 in the upper space 5, as shown in FIG. 7, and a new additional gas pipe 12A is installed in the laid gas pipe 12. A space that can be welded to the rear end portion 12a is secured. Then, the additional gas pipe 12A is lowered by a crane or the like and horizontally moved, and the two are joined together at the welding portion 24 with the rear end portion 12a of the gas pipe 12 to perform welding.
By repeating such work, in an ordinary state, while excavating the tip of the shield tunnel 3 with a shield excavator, the additional gas pipe 12A is abutted against the gas pipe 12 and welded, and the gas pipe 12 is placed in the lower space 6. The gas pipe 12 can be laid by being pushed into the water. At the same time, the transport carriage 10 carrying the segment 4 and the like is transported to the excavation area at the tip of the tunnel 3 through the rail 8 in the upper space 5.

  When the gas pipe 12 is suspended in water in the lower space 6 and moved forward in accordance with the excavation of the tunnel 3 by the shield excavator, the front side of the excavation-side water stop plate 17 provided in the lower space 6 in front of the tunnel 3. A new excavation side water stop plate 17 is installed. And the gas pipe 12 is further laid in the lower space 6 according to the excavation of the tunnel 3 by removing the rear excavation side water stop plate 17 and supplying new water into the lower space 6 by the water supply hose. Can do. At that time, the sleepers 7 are added in the tunnel 3 and the rails 8 and 9 are also laid. By repeating such steps, the gas pipe 12 can be laid in the lower space 6 in the shield tunnel 3.

As described above, according to the shield tunnel construction structure 1 and construction method for the gas pipe 12 according to the present embodiment, the shield tunnel 3 is advanced by the shield excavator, and the gas pipe 12 is welded in the shaft 2 to lower the bottom. The gas pipe 12 can be inserted and laid in the space 6 at the same time, and the material such as the segment 4 and the workers and the like in the upper space 5 are simultaneously transported to the excavation area. be able to.
Even if the shield tunnel 3 is a small-diameter tunnel 3 dedicated to the pipeline, such as the gas pipe 12, the detachable rail 8b between the outer rail 8a and the rail 8 for conveying the material such as the segment 4 is normally connected to the traverser 25. Therefore, the gas pipe 12A can be easily welded and conveyed by removing it from the conveying path of the gas pipe 12 and the welding portion 24. Further, when conveying the material such as the segment 4, the outer rail 8a and the upper space 5 are moved by the movement of the traverser 25. By connecting the inner rail 8 with the detachable rail 8b, the shield tunnel 3 can be dug, the gas pipe 12 can be laid and transported, and the material such as the segment 4 can be transported simultaneously.

In addition, the construction structure and construction method of the tunnel for piping by this invention are not limited to the above-mentioned embodiment, In the range which does not change the summary of this invention, it replaces or changes suitably the structure of embodiment mentioned above. be able to.
For example, in the above-described embodiment, as a means for inserting and laying the gas pipe 12 into the lower space 6 of the tunnel 3, the FT method for supplying water to the lower space 6 and floating it in water is used. However, the present invention is not limited to such an insertion / arrangement method and structure of the gas pipe 12. For example, a plurality of rollers may be arranged in the lower space 6 of the tunnel 3 at a predetermined interval, and the gas pipe 12 may be inserted and arranged by being guided by these rollers.

In the above-described embodiment, when connecting and laying the gas pipe 12, the detachable rail 8 b between the rail 8 and the outer rail 8 a in the upper space 5 is attached to the welded portion 24 of the gas pipe 12 by the traverser 25. When the material such as the segment 4 is transported by the transport carriage 10, the removable rail 8b is moved by the traverser 25 to a position where the outer rail 8a and the rail 8 in the upper space 5 are continuous. The material may be transported into the upper space 5 by the transport carriage 10 while the outer rail 8 a and the rail 8 are kept continuous by the detachable rail 8 b on the top 25. If such a configuration is adopted, the traverser 25 becomes unnecessary.
Further, when the inner diameter of the shield tunnel 3 is sufficiently large, it is necessary for welding between the additional gas pipe 12A and the detachable rail 8b installed at the upper part of the welded portion 24 between the gas pipe 12 previously laid. Space can be secured. In that case, the traverser 25 may be omitted, and the outer rail 8 a of the track may be installed on the extension of the rail 8 in the upper space 5.

  In the embodiment described above, the outer rail 8a is installed in the shaft 2 separately from the detachable rail 8b moved by the traverser 25. However, the outer rail 8a is omitted and only the detachable rail 8b is provided in the upper space 5. You may arrange | position outside. Alternatively, the outer rail 8 a and the detachable rail 8 b arranged outside the upper space 5 are integrated and placed on the traverser 25, and the traverser 25 overlaps the position disengaged from the welded portion 24 of the gas pipe 12. It may be movable.

  In the above-described embodiment, the shield tunnel 3 for laying the gas pipe 12 has been described. However, the present invention is not limited to the laying of the gas pipe 12, and various gases such as other gases, waterworks, sewers, and the like. It can be adopted as a construction structure and construction method for a tunnel for piping for laying a pipeline such as a pipe for fluid.

1 Construction of gas pipe tunnel 2 Vertical shaft 3 Shield tunnel, tunnel 4 Segment 5 Upper space 6 Lower space 7 Sleepers 8, 9 Rail (track)
8a Outer rail (track)
8b Detachable rail (track)
DESCRIPTION OF SYMBOLS 10 Carriage trolley 12 Gas pipe 12A Additional gas pipe 13 Start side water stop plate 14 Water stop mechanism 15 Water stop member 15a Insertion hole 17 Drilling side water stop plate 23 Centering device 24 Welding part 25 Traverser 26 Pushing means 28 Electric winch 29 Wire 32 Pull-in hook 35 Buffer band

Claims (5)

The tunnel interior is divided into an upper space and a lower space by a partition plate, and the construction method of the tunnel for piping is such that the material for tunnel construction is transported by the carriage in the upper space and the piping is laid in the lower space,
Simultaneously digging the tunnel and laying pipes in the lower space,
A method for constructing a tunnel for piping, characterized in that after the additional piping added at the tunnel shaft and the piping laid earlier are welded, the piping is pushed into the lower space. Outside the upper space of the tunnel, a traverser that is movable in a direction intersecting the longitudinal direction of the pipe, and a track of the carriage placed on the traverser,
The pipe according to claim 1, wherein in the welding step of the additional pipe and the previously laid pipe, the trajectory of the carriage is removed from a welded portion between the additional pipe and the previously laid pipe by a traverser. Tunnel construction method. Outside the upper space of the tunnel, a traverser that is movable in a direction intersecting the longitudinal direction of the pipe, and a track of the carriage placed on the traverser,
2. When carrying material into the upper space of the tunnel with the carriage, the welding of the piping is interrupted and the traverser is moved so that the track of the carriage is continuous with the track in the upper space. Or the construction method of the tunnel for piping described in 2. It is a construction structure of a tunnel for piping that is divided into an upper space and a lower space by a partition plate inside the tunnel,
A track of a carriage that is installed in the upper space of the tunnel and extends from the shaft to the excavation area of the tunnel and carries materials for tunnel construction,
A welding jig for welding an additional pipe to be added to a pipe installed in a lower space of the tunnel provided in the tunnel shaft;
A pressing means for pushing the welded additional pipe and the pipe laid in advance into the lower space;
A construction structure of a tunnel for piping, wherein the tunnel is dug and piping is inserted in the lower space at the same time. The construction structure of the tunnel for piping according to claim 4,
A traverser movable in a direction intersecting the longitudinal direction of the pipe is disposed outside the upper space of the tunnel, and the track of the carriage is installed on the traverser.
A construction structure of a tunnel for piping in which the traverser removes the track of the carriage from the welded portion between the additional pipe and the previously laid pipe when welding the additional pipe and the previously laid pipe.

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