JP2002188756A - Pipe laying method in tunnel and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently lay a pipe in a tunnel by feeding and laying a long pipe efficiently manufactured by providing a long pipe production place on the ground or connecting and extending a single pipe on the ground and feeding and laying the pipe into the tunnel. SOLUTION: In a pipe laying method into a tunnel 1 provided underground, the long pipe lengthened by joining a plurality of single pipes on the ground is joined to the rear end of an already existing feed pipe 4. The pipe is fed into the tunnel 1 underground through an oblique passage 6 connecting a tunnel entrance part 5 underground with the ground. The pipe is laid and extended in the tunnel 1 while this work is repeated.

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 efficiently laying a pipe such as a gas pipe or an oil pipe in a relatively long shield tunnel or a cave provided on the seabed or underground on the land. .

[0002]

2. Description of the Related Art In recent years, a gas pipeline trunk network from an LNG receiving terminal to a wide area of demand and a gas pipeline network for supplying city gas to general consumers such as factories and households have been developed. In addition, there has been conventionally known a transport pipe for feeding oil received at a sea berth to a land tank.

[0003] These gas conduits, oil feed pipes, etc., are several hundred meters long.
It is buried underground and under the sea for a long distance of several kilometers. These pipes are important facilities and require regular maintenance and inspection.
From the viewpoint of ensuring earthquake resistance, it is protected by being installed in a shield tunnel, a cave, a fume pipe, etc. (hereinafter referred to as a tunnel) installed earlier.

Conventionally, in order to lay a pipe in an underground tunnel, a single pipe of about 6 to 12 m length is hung down from the shaft to the entrance of the tunnel, and is transported to the inner side of the tunnel by a movable carriage and welded. In general, a means for sequentially extending the length was used.

Japanese Unexamined Patent Publication No. 7-208646 (Prior Art 1) proposes a technique for improving the workability of this method. For this, first, a track 102 is provided in a tunnel 101, and a tube carrier 103 and a portal crane 104 traveling on the track are arranged. Single pipe 1 brought in from a shaft
05 is received by the tube carrier 103 and transported to the back of the tunnel. Then, the pipe is laid and extended in a process of transferring the single pipe 105 from the pipe transporting trolley 103 to the portal crane 104 at a predetermined position and joining the single pipe 105 to the previously laid pipe end (see FIG. 15).

However, in this method (Prior Art 1), when laying in a long-distance tunnel, it is necessary to convey single pipes one by one and join and extend many single pipes in the tunnel. Therefore, especially when working in the back of a tunnel, welding,
There is a problem that it is not easy for workers and supervisors for inspection and anticorrosion to go back and forth to the work site, resulting in extremely poor work efficiency. There is also a problem that it is difficult to remove welding fume generated at the back of the tunnel during welding work.

The applicant has disclosed Japanese Patent Application Laid-Open No. 4-160282 (registration number 27542) to solve the problem of the above method.
No. 81: Proposed prior art 2) (see FIG. 16).
The prior art 2 is characterized by comprising the following two inventions.

One of the inventions of the prior art 2 is that a predetermined section of a shaft portion of a long-distance tunnel is expanded in diameter to form a long pipe manufacturing space 1.
08, a plurality of single tubes 105 suspended from a shaft are joined (increased in length) in a long tube manufacturing space 108 to form a long tube 109, and the long tube 109 is transported into the tunnel 101 to be laid in advance. They are joined and laid and extended.

Another invention of the prior art 2 is that the centering stage 110, the welding stage 1
11. The inspection stage 112 is provided, and the work of each stage is performed simultaneously, and the process of moving the single tube length toward the back of the tunnel is repeated to lay the pipe. Conventional technology 2
Each of the inventions has an effect that the work efficiency is good and the welding fume can be easily removed.

[0010]

As a means for solving the above-mentioned problem of the prior art 1, it is conceivable to join a plurality of single pipes on the ground to form a long pipe into a tunnel and extend the connection. . However, there is a problem in that the opening of the shaft needs to be enlarged in order to allow the long pipe to be hung, and the construction of the shaft becomes large.

On the other hand, even in the case of the prior art 2, the tunnel shaft is enlarged by a predetermined section and the long pipe manufacturing space 1 is placed underground.
08, there is naturally a limit on the diameter expansion space. In addition, there is a problem that a long construction period and a large cost are required for constructing the tunnel at the enlarged diameter portion.

The present invention is an advantageous improvement of the prior art, in which a tunnel and a shaft are maintained without being expanded, and a long pipe production site is provided on the ground to efficiently manufacture a long pipe. The pipe is laid in the tunnel, or a single pipe is connected and extended on the ground, and then sent out and laid in the tunnel to efficiently lay the pipe in the tunnel.

[0013]

The present invention has the following features to solve the above-mentioned problems.

<First Invention> In a method of laying a pipe in a tunnel 1 provided underground, a plurality of single pipes 2 are joined on the ground (hereinafter, "joining" is not limited to welding, inspection, corrosion prevention, etc. The long pipe 3 which has been lengthened by performing
And is sent into the underground tunnel 1 through a ramp 6 connecting the underground tunnel entrance 5 and the ground, and pipes are laid and extended in the tunnel 1 while repeating this operation. This is a method of laying pipes in a tunnel.

<Second Invention> In the first invention, the long pipe 3 is manufactured in an elongated space 10 continuously provided behind the ramp (before the ramp entrance on the ground). It is characterized by.

<Third invention> In the first invention, a long tube manufacturing yard 11 is provided on a side of an elongated space 10 continuously provided behind the ramp.

<Fourth invention> In a method of laying a pipe in a tunnel 1 provided underground, an underground tunnel entrance 5
A ramp 6 connecting the ground and the ground is provided, and a single pipe 2 set on a roller of an elongated space 10 continuously provided behind the ramp is centered at the rear end of the already delivered pipe 4 and welded and extended. At the same time, inspection of the already welded part and anticorrosion treatment are performed in parallel,
A pipe laying method in a tunnel is characterized in that pipes are laid and extended in the tunnel 1 while repeatedly sending out the single pipe length into the underground tunnel 1 through the ramp 6.

<Fifth Invention> In the first to fourth inventions, a pilot hole is excavated by an excavator whose track can be controlled from the ground toward the tunnel shaft 7, and excavation is performed along the pilot hole. This is characterized in that the inclined path 6 is formed in a straight line or a curved line by installing the casing 9.

<Sixth Invention> Rollers 12 are arranged at appropriate intervals in a tunnel 1 provided underground and at least at an entrance and an exit of a ramp 6 connecting the tunnel entrance 5 underground and the ground. The centering device 13, the welding device 14, the inspection device 1
5. A long pipe manufacturing plant equipped with a joint anticorrosion device 16, and a long pipe 3 manufactured in a long space 10 is joined to the rear end of the already delivered pipe 4 to lay and extend the tunnel 1 in the tunnel 1.
7, a pipe laying device in the tunnel 1.

<Seventh invention> Rollers 12 are arranged at appropriate intervals in a tunnel 1 provided underground and at least at an entrance and an exit of a ramp 6 connecting the tunnel entrance section 5 underground and the ground. A long pipe manufacturing yard 11 for manufacturing a long pipe 3 by joining a plurality of single pipes 2 is provided on the side of a continuous lengthening space 10.
The centering device 13, welding device 14, inspection device 15, joint anticorrosion device 16, and means for moving the long pipe 3 to the elongate space 10 are provided. A centering device 13, a welding device 14, an inspection device 15, a joint anticorrosion device 16, and a clamp 18 capable of locking the already delivered pipe 4 are provided at the rear end of the pipe, and the elongated pipe is tunneled. An apparatus for laying a pipe in a tunnel, comprising a pipe moving apparatus 17 for laying and extending the inside of the pipe.

<Eighth invention> In the seventh invention, a plurality of rows of turning rollers are arranged in the long pipe manufacturing yard 11, and the single pipe 2 can be joined by rotary welding.

<Ninth Invention> Rollers 12 are disposed at appropriate intervals in a tunnel 1 provided underground and at least at the entrance and exit of a ramp 6 connecting the tunnel entrance part 5 underground and the ground. A long pipe manufacturing site including a centering stage 20, a welding stage 21, an inspection stage 22, and a joint anticorrosion stage 23 is provided in a continuous lengthening space 10, and a clamp that can lock the already delivered pipe 4 is provided. 18 and a pipe moving device 17 for laying and extending the elongated pipe in the tunnel 1. The single pipe 2 is set at the rear end of the delivery pipe 4 in the elongated space 10, and the centering is performed. The welding and joining, inspection, and corrosion prevention of the joints are simultaneously performed, and the lengthened pipes are repeatedly sent out into the underground tunnel 1 through the ramps 6 by a single pipe length to extend and lay the pipes. A tube laying device into the panel 1.

The present invention has the following operation from the above configuration. First, long pipes 3 and the like, which are made by joining a plurality of single pipes, are joined to the already delivered pipes 4 by ground work, and laid and extended through the ramp 6, so that work can be performed efficiently and high quality is provided for the pipes provided. Can be secured.

Also, the single pipe 2 is centered at the rear end of the already delivered pipe 4 and welded and extended, and at the same time, the inspection of the already welded portion and the anticorrosion treatment are performed in parallel, and the length of the single pipe is passed through the ramp 6 through the underground. A laying means for laying and extending a pipe in the tunnel 1 while repeatedly sending it into the tunnel is extremely efficient because welding, inspection, and corrosion prevention can be performed simultaneously in parallel.

Further, if a large space can be secured on the ground, a long tube manufacturing yard 11 is provided on the side of the long space 10 and the completed long tubes 3 are sequentially manufactured while manufacturing a plurality of long tubes 3. It can be moved to the elongate space 10 and joined to the rear end of the delivered pipe 4 that has been delivered. Therefore, the pipe can be laid and extended more efficiently than when the long pipe 3 is manufactured in the long space 10.

Further, since the welding operation is performed on the ground, the problem of welding fume which is a major problem in the welding operation in the tunnel 1 can be solved. That is, since the welding fume is spread on the ground, a smoke exhaust device is not required.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, when laying a pipe such as a steel pipe in a tunnel 1 constructed by a shield method or the like, a long pipe is provided continuously at the rear of a ramp connecting the tunnel entrance 5 of a shaft 7 to the ground. The long pipe 3 or the single pipe 2 is joined to the rear end of the pipe already delivered in the lengthening space 10, and the pipe is laid in the tunnel 1 through the ramp 6.

The ramp 6 serving as a pipe laying line from the ground to the tunnel entrance is an inclined pipe introduction part connecting the ground and the tunnel entrance 5 of the shaft 7, and has a vertical cross section or a linear slope. And a curved portion are formed continuously. The ramp 6 plays an important role as an introduction portion of the pipe when the long pipe 3 or the single pipe 2 manufactured on the ground in the present invention is joined to the rear end of the already delivered pipe 4 and laid and extended.

<Embodiment of Rampway> FIGS. 1 to 4 are longitudinal sectional views specifically showing an embodiment of the ramp 6 according to the present invention, together with an underground tunnel at the front and an elongated space at the rear.

<Type A (FIG. 1)> The ramp 6 passes from the shaft 7 through a curved section (sag bend) having a radius of curvature r2 at the exit of the ramp and a curved section (overbend) having a ramp radius θb and a radius of curvature r1 at the entrance of the ramp. It is formed in a substantially S-shape and reaches the ground, and is extended to the rear elongate space 10 (roller mount) at the ground surface inclination angle θa. This type is a ramp angle θb
Is increased to reduce the horizontal length of the ramp, but the inclination angle θa of the elongated space is made gentler than the inclination θb of the ramp to facilitate the joining work of the pipes and the manufacture of the long pipe. In the tunnel 1, at the entrance and exit of the ramp 6, and on the elongate space 10, rollers 12 for transporting the pipes are arranged at appropriate intervals.

<Type B (FIG. 2)> From the shaft 7 to the curved part (sag bend) having a radius of curvature r2 from the shaft 7, the inclined road inclination angle θ
b, it reaches the ground, and is extended to the rear elongate space 10 with the same inclination (θb = θa). The only difference from the type A is that the inclination angle θa of the elongated space 10 and the inclination θb of the ramp are the same. When the slope θb of the ramp is made gentle, and there is no hindrance to the joining work of the pipes in the elongated space 10 and the production of the elongated pipe, the slope θb of the ramp and the inclination angle θa of the elongated space may be the same. . In the type B, the horizontal length of the ramp is longer than that in the type A.

<Type C (FIG. 3)> The ramp 6 is a curved portion (sag bend) having a radius of curvature r2 from the shaft 7, and the ramp inclination angle θ.
b, formed in a substantially S-shape through a curved portion (overbend) having a radius of curvature r1, reaches the ground, and continuously extends to an elongated space 10 horizontally arranged on the ground. In this type, since the joining operation of the pipes and the production of the long pipes can be performed in the elongated space 10 in the horizontal arrangement, the work can be easily performed.

<Type D (FIG. 4)> A curved portion (sag bend) having a radius of curvature r2 is provided in the shaft 7, reaches the ground via an underground inclined road inclination angle θb, and is curved on the ground with a radius of curvature r1. It extends continuously to the elongated space 10 horizontally arranged through a curved portion (sag bend) of r2 opposite to (overbend). In this type, since the underground slope is straight slope, it is relatively easy to use the straight propulsion method.
However, there is a disadvantage that the laying line on the ground is long and an occupied space is required.

Table 1 summarizes these embodiments using parameters of the radius of curvature and the inclination angle.

[Table 1]

In determining the parameters of the ramp 6, the following points are considered. Curvature radii (r1, r2, r3) The curved portion at the entrance or exit of the ramp 6 must have a radius of curvature such that excessive bending stress does not occur due to the alignment at the time of pipe laying. Further, when sending out a long tube, it is necessary to have a radius of curvature that allows smooth movement. On the other hand, if the radius of curvature is too large, the ramp 6 becomes long, and a large space is required. Therefore, the radius of curvature is determined from the outer diameter of the tube and the material strength, but is actually 500D to 2,000.
It is desirable to set it to about D (D: tube outer diameter). The curved portion of the ramp 6 may be in the underground ramp at the entrance or exit of the ramp, on the ground, or in the shaft 7.

Ground surface inclination (θa) The ground surface inclination θa is made as gentle as possible in consideration of the two points that the pipe becomes slippery when the inclination is made steep and the workability of manufacturing the long pipe in the elongated space 10. It is better to incline. Therefore, it is preferable that θa be within 0 ° (horizontal) to 30 °, and particularly within 20 °.

The slope inclination angle (θb) The slope inclination angle θb is such that the pipe becomes easier to slide when the slope is made steeper, but the longer the slope, the longer the space required for the slope. Therefore, a gentle inclination is desirable if there is room in the space. However, if there is no room in the space, θb is preferably set to about 15 to 20 degrees.

<Construction of ramp> The construction of the ramp 6 in the present invention is mainly based on a non-cutting type. In particular, when the tunnel depth h is deep, the open-cut type is advantageous because the excavated type increases the amount of excavated soil and increases the size of the retaining wall.

In the non-cutting method, a hole having an inner diameter larger than the outer diameter of the pipe is excavated by a propulsion method, and a casing 9 is provided to protect the hole wall. In addition, when the inclined road has a straight slope, the slope excavation may be performed by the straight propulsion method. However, when the entrance or the exit of the inclined road is curved, it is necessary to use a non-cutting propulsion method capable of curving.

When the curve propulsion method by non-cutting is adopted, the arc propulsion method "PLAD method" (registered trademark) of Nippon Steel Corporation can be used. Specifically, a ramp is excavated by the following steps (see FIG. 6).

From a ramp entrance side (ground side) to a ramp exit side (tunnel shaft 7), a small-diameter pilot hole is excavated along a planned orbit 25 by a known curved excavation device, and a pilot pipe 24 is installed ( 6A, B). After the pilot pipe 24 reaches the tunnel shaft 7, the drill bit 27 attached to the tip of the drill pipe 26 is rotated to expand the pilot hole to a predetermined hole diameter, and the pipe in the pilot hole is replaced with the pilot pipe 24. Replace with a larger diameter drill pipe 26 (FIG. 6C). Next, the casing 9 is drawn in from either the ramp entrance side (ground side) or the ramp exit side (tunnel shaft 7), and the curved ramp 6 is formed by the casing 9 (FIG. 6D).

When the tunnel depth h is shallow, an inclined road may be formed by an open groove.

Next, equipment required when laying the pipe according to the present invention will be described. (1) Elongated space Elongated space 10 is a long tube 3 or a single tube 2 and an already delivered tube 4
This is provided for performing the operation of extending the joint at the rear end, and is configured by disposing rollers 12 at appropriate intervals or by a roller and a work stage. The elongate space 10 is provided continuously behind the inclined road, and can be installed at an inclination angle different from the inclination angle of the inclined road 6 with respect to the ground surface. That is, not only the inclination angle with respect to the ground surface but also the inclination angle with respect to the ground surface, which is gentler than the inclination road 6 or the horizontal surface with respect to the ground surface, can be provided. The long tube manufacturing space may be integrated with the long tube manufacturing yard 11.

(2) Rollers The rollers 12 are disposed at appropriate intervals in the elongating space 10, the long pipe manufacturing yard 11, the ramp entrance, the ramp exit, and the tunnel 1, and serve to smoothly transfer the pipes. Fulfill.
7 and 8 are views showing an example of a roller used in the present invention. FIG. 9 is an axial sectional view of a tunnel for showing a mounted state of the roller of FIG.
8 are provided at appropriate intervals. In addition, instead of the roller 12, a roller carriage 2 assembled so that a pair of rotating members 18 open in an inverted V-shape toward the ground contact surface.
Alternatively, a tube may be placed at 9 (FIG. 8).

(3) Clamp The clamp 18 is provided at the end of the elongated space or at the end of the casing at the entrance of the ramp. The clamp 18 locks the already delivered pipe 4 so that it does not slide toward the ramp 6 when the long pipe is manufactured, and is released when the pipe is delivered into the tunnel 1. FIG. 10 is a view showing an example of the clamp 18. FIG. 10A is a jack clamp that locks a pipe from four directions by a jack 30 via an arc-shaped locking member 31. FIG. 10B shows a clamp that locks the pipe by clamping the opposed semi-cylindrical member 32 with a hydraulic clamp 33.

(4) Pipe Moving Apparatus The pipe moving apparatus 17 is used for connecting the long pipe 3 or the single pipe 2 to the rear end of the already delivered pipe 4 and then drawing or sending it into the tunnel 1. The pipe moving device 17 includes (a) a pulling trolley called a battery locomotive that pulls the pipe tip,
(B) A winch is fixed at the back of the tunnel and a wire rope connected to the end of the pipe is wound around and pulled. (C) A jack 3 is arranged at the rear end or intermediate part of the pipe to move the pipe by a stroke operation. For example, a known pipe moving device can be applied.

(5) In addition, when manufacturing the long pipe 3 or joining the long pipe 3 or the single pipe 2 to the already delivered pipe 4, the centering device 13 (internal clamp or the like) for pipe joining, welding, etc. A device 14, an inspection device 15 (an X-ray inspection device, an ultrasonic inspection device, and the like), a joint anticorrosion device 16, and the like are required. These facilities may be provided on the elongate space 10 or the long pipe manufacturing yard 11, but as shown in FIG. 15, a pipe connection truck 37 loaded with the welding device 14, the inspection device 15 (X-ray inspection device) and the like. By using, it is also possible to improve workability.

(6) As shown in FIG. 5, when a long tube manufacturing yard 11 is provided on the side of the elongated space 10, a turning roller or a lateral moving device (lateral moving truck) is provided in the long tube manufacturing yard 11. ) If 19 or the like is arranged, the efficiency can be further improved.

Next, a method for laying a pipe according to the present invention will be described. The pipe laying method includes (i) a long pipe laying method in which a plurality of single pipes are welded and joined to a rear end of an already delivered pipe and sent out, or (ii) work for each process such as welding and inspection. There are two types of single pipe laying method in which a stage is provided, and the work of each step is performed simultaneously and sent out for each single pipe.

(I) The long pipe laying method is performed in the following steps (see FIG. 13). (A) is first set (four b ₁ ~b ₄ in the figure) single pipe 2 behind the plurality to elongated space already delivery pipe 4, performing centering tack. (B) Next, a plurality of single tubes 2 are joined to produce a long tube 3, and an X-ray (ultrasonic) inspection and a corrosion prevention treatment of a welded portion are performed.
The long pipe 3 is joined to the rear end of the already delivered pipe 4. (C) After inspecting and preventing corrosion in the same manner as in the case of single pipe joining, pipes are sent out into the tunnel 1 in units of joined long pipes, and the following steps (A) to (C) are repeated. Note that, except when the long pipe is sent, the rear end of the already sent pipe 4 is locked by the clamp 18 and the clamp 18 is released only at the time of sending (C).

The long pipe 3 may be manufactured in a long space 10 continuously provided behind the inclined road. However, if a long space for manufacturing the long pipe can be secured, the side of the long space 10 may be manufactured in a long pipe. Yard 11 is better. Long pipe production yard 11
At the same time, a plurality of long pipes 3 are manufactured at the same time, the manufactured long pipes 3 are sequentially moved laterally, mounted on rollers of the elongating space 10, and bonded to the rear end of the already-transmitted pipes 4 and transmitted into the tunnel 1. Can be repeated, and the efficiency can be further improved.

Further, if a turning roller is used at the time of manufacturing a long pipe, a downward welding operation can be performed, so that efficiency can be improved and quality can be easily secured.

(Ii) The single pipe laying method is performed in the following steps (see FIG. 14). (A) From the rear end, a centering stage 20, a welding stage 21, an inspection stage 22, and a joint anticorrosion stage 23 are arranged in this order on the rear end of the already delivered pipe (4d) on the elongate space 10 in which each equipment is arranged. Set the tube (2e). (B) At each stage during the centering operation of the single pipe (2e), welding (cd joint), inspection (bc joint), and anticorrosion (ab joint) are simultaneously performed in each stage. (C) After all the operations of each step are completed, the pipe is sent out into the tunnel 1 by the length of a single pipe. This is a method of repeating the following steps (A) to (C).

In the single pipe laying method, the laying work can be performed efficiently when the space for manufacturing the long pipe cannot be secured. In this operation, if the welding operation process becomes critical, the welding stage 21 may be provided at two locations. In addition, it is preferable that the steps that can be performed in a short time are performed on the same stage so that the operation time of each step is well-balanced and the loss time for each step is reduced.

The above-described long pipe laying method and single pipe laying method can be freely selected in the above-described ramp types A to D. The laying method for each type of ramp will be described in detail in an embodiment.

[0056]

FIG. 1 shows an embodiment of a method for laying a pipe in a tunnel using a type A ramp.
In the first embodiment, the pipe laying line to the tunnel entrance 5 is r
2. The pipe is formed in a substantially S-shape including a curved portion having a radius of curvature of r1 and an inclined road slope of θb.
Space 10 inclined from the ground surface by θa
(Roller mount).

The elongating space 10 is composed of appropriately arranged rollers and a supporting frame, and the inclination angle θa is set to be smaller than the inclination θb of the ramp 6 in order to facilitate joining work of the pipes and manufacture of the long pipes. I have. In addition, rollers 12 for transporting the pipes are arranged at appropriate intervals in the tunnel, at the entrance of the ramp, at the exit of the ramp, and in the elongated space.

A plurality of single tubes 2 set in the elongated space 10 are welded and joined to form a long tube 3, or the single tube 2 is joined to the rear end of the already delivered pipe 4 as it is.

When the clamp 18 is released, the pipe is sent to the tunnel 1 by the pipe moving device 17 such as a battery locomotive. When the delivery of the long tube or the single tube is completed, the clamp 18 is operated to lock the tube, and the next long tube is manufactured or the single tube is joined. A pipe is laid in the tunnel 1 by repeating this series of operations.

In the following embodiments, the same components are denoted by the same reference numerals as in the first embodiment, and the description is omitted.

<Embodiment 2: Type B> FIG. 2 shows an embodiment of a method of laying a pipe in a tunnel using a type B ramp. The second embodiment is a modification of the first embodiment, and is different from the first embodiment only in that the inclination angle θa of the elongate space 10 and the inclination θb of the ramp 6 are the same, and other configurations are implemented. Same as Example 1.

<Embodiment 3: Type C> FIG. 3 shows an embodiment of a method of laying a pipe in a tunnel using a type C ramp. In the third embodiment, the ramp 6 that is continuous with the elongate space 10 that is horizontal to the ground surface is curved at the radius of curvature of the ramp entrance r1 and has a radius of curvature r2 at the ramp exit of approximately S.
It is formed in a character shape. In the third embodiment, since the pipe joining operation and the long pipe production can be performed in the horizontal elongate space that is not inclined with respect to the ground surface, the operation can be easily performed. In FIG. 3, the rollers are appropriately arranged on the ground, but a work stage may be provided.

<Embodiment 4: Type D> FIG. 4 shows an embodiment of a method of laying a pipe in a tunnel using a type D ramp. In the first to third embodiments, the curved portion is provided in the underground ramp, but in the fourth embodiment, the ramp 6 has a straight slope without the curved portion in the ground. If the space is continued to the elongate space 10 as it is, the elongate space 10 will be at a high place and work will be difficult. Therefore, in order to facilitate the work, the laying line must be curved from the entrance of the ramp (r1). ), The curvature (r3) in the opposite direction is continued, and is continued to the horizontally elongated space on the ground surface. Although the fourth embodiment has the disadvantage that the space occupied by the ground portion becomes long, there is an advantage that the non-drilled hole can be easily constructed because the inclined road 6 can be excavated linearly in an inclined manner.

The present invention is not limited to the above embodiment. For example, a long tube manufacturing yard 11 is provided on the side of the horizontal elongate space of Examples 3 and 4, a plurality of long tubes are manufactured simultaneously in the long tube manufacturing yard 11, and the manufactured long tubes are sequentially moved laterally. Mounted on rollers in the elongate space 10,
You may make it join with the rear end of the already delivered pipe | tube and transmit it in a tunnel. (See Fig. 5)

Further, a long tube manufacturing yard 11 is provided on the side of the inclined elongated space 10 of Examples 1 and 2, and the elongated tube is lifted by a crane and mounted on rollers of the elongated space. Is also good.

[0066]

<Effect of Claim 1> A long pipe or the like lengthened by ground work is joined to an already delivered pipe and laid and extended through a ramp, so that work can be performed efficiently and quality control on the ground can be performed. Since it can be easily performed, high quality can be ensured for the provided pipe.

<Effect of Claim 2> A single pipe set in an elongated space continuously provided behind the inclined road is centered at the rear end of the already delivered pipe, welded and extended, and at the same time, the welded portion is set. The inspection means and the anticorrosion treatment are performed in parallel, and the laying means for laying and extending pipes in the tunnel while repeating sending out the single pipe length into the underground tunnel through the ramp is performed by welding in a limited occupied space, Inspection and anticorrosion work can be performed simultaneously, which is extremely efficient.

<Effect of Claim 3> If a large space can be secured on the ground, a long pipe manufacturing yard is provided on the side of the long space, and a long pipe completed while manufacturing a plurality of long pipes. Can be sequentially moved laterally on the elongate space, and can be joined to the rear end of the already delivered pipe, so that the pipe can be laid and extended more efficiently.

<Advantage of Claim 4> Since the welding operation is performed on the ground, the problem of welding fume which is a major problem at the time of welding operation in a tunnel can be solved. That is, the welding fume can be diffused more spontaneously than when welding is performed in an underground tunnel, so that a smoke exhaust facility for the welding fume is not required.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment (slope type A) of the present invention.

FIG. 2 is a longitudinal sectional view of Embodiment 2 (slope type B) of the present invention.

FIG. 3 is a longitudinal sectional view of a third embodiment (slope type C) of the present invention.

FIG. 4 is a longitudinal sectional view of Embodiment 4 (ramp type D) of the present invention.

5 is a plan view (A) and a longitudinal sectional view (B) of a state where a long tube manufacturing yard is provided as a modification of the third embodiment (FIG. 3).
FIG.

FIG. 6 is a view showing a process of constructing a ramp by a non-cutting curve propulsion method.

FIG. 7 is a diagram illustrating an example of a roller used in the present invention.

FIG. 8 is a diagram illustrating an example of a roller (roller cart) used in the present invention.

FIG. 9 is an axial sectional view of a tunnel for showing a mounted state of the roller of FIG. 7;

FIG. 10 is a diagram showing an example of a clamp used in the present invention.

FIG. 11 is a view showing a pipe connecting truck of a laterally movable truck on which a welding device, an X-ray inspection device, and the like are mounted.

FIG. 12 is an example of a laterally moving carriage in a long tube production yard.

FIG. 13 is a view showing steps of a long pipe laying method.

FIG. 14 is a view showing steps of a single pipe laying method.

FIG. 15 is a schematic diagram of the related art 1 (Japanese Patent Laid-Open No. 7-208646).

FIG. 16 is a schematic diagram of a conventional technique 2 (Japanese Patent No. 2754281).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel 2 Single pipe 3 Long pipe 4 Existing pipe 5 Tunnel entrance part 6 Ramp 7 Shaft 7 Tunnel 9 Casing 10 Lengthening space 11 Long pipe manufacturing yard 12 Roller 13 Centering device 14 Welding device 15 Inspection device 16 Joint Part anticorrosion device 17 Pipe moving device 18 Clamp 19 Lateral moving device (lateral moving trolley) 20 Centering stage 21 Welding stage 22 Inspection stage 23 Coupling anticorrosion stage 24 Pilot pipe 25 Planned track 26 Drill pipe 27 Drilling bit 28 Rotating member 29 Roller trolley 30 Jack 31 Locking member 32 Semi-cylindrical member 33 Hydraulic clamp 37 Pipe connection truck 38 Soil 101 Tunnel 102 Track 103 Pipe transport trolley 104 Portal crane 105 Single pipe 106 Soil 107 Pipe loading crane 108 Long pipe manufacturing space 09 length pipe 110 centering temporary assembly stage 111 welding stage 112 inspection stage 113 flue gas facilities

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Fujimori 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Keiji Iwagami 2-6-3, Otemachi, Chiyoda-ku, Tokyo Nippon Steel Corporation

Claims (9)

[Claims] In a method of laying a pipe in a tunnel provided underground, a plurality of single pipes are joined on the ground to lengthen a long pipe to a rear end of an already delivered pipe, and a tunnel entrance portion in the basement is provided. A method of laying pipes in a tunnel, characterized in that the pipes are sent out into an underground tunnel through a ramp connecting the ground and the ground, and pipes are laid and extended in the tunnel while repeating this operation. 2. The method for laying a pipe in a tunnel according to claim 1, wherein a long pipe is manufactured in an elongated space continuously provided behind the ramp. 3. The method for laying a pipe in a tunnel according to claim 1, wherein a long pipe manufacturing yard is provided on a side of an elongated space continuously provided behind the ramp. 4. A method for laying a pipe in a tunnel provided underground, wherein a ramp is formed between the entrance of the underground tunnel and the ground, and a roller is provided on an elongated space continuously provided behind the ramp. The set single pipe is centered at the rear end of the already delivered pipe, welded and extended, and at the same time, the inspection of the already welded part and the anticorrosion treatment are performed in parallel, and the length of the single pipe is sent out into the underground tunnel through the ramp. A method of laying a pipe in a tunnel, wherein the pipe is laid and extended in the tunnel while repeating the above. 5. A pilot hole is excavated by an excavator whose track can be controlled from the ground toward a tunnel shaft, excavation is performed along the pilot hole, and a casing is installed to form a straight or curved ramp. The method for laying a pipe in a tunnel according to any one of claims 1 to 4, wherein a pipe is formed. 6. Rollers are provided at appropriate intervals in a tunnel provided underground and at least at the entrance and exit of a ramp connecting the entrance of the underground tunnel to the ground, and are provided continuously at the rear of the ramp. In the tunnel, a long pipe manufacturing site equipped with a centering device, a welding device, an inspection device, and a joint anticorrosion device, and a long pipe manufactured in the long space is joined to the rear end of the already delivered pipe. A pipe laying device in a tunnel, comprising a moving device for laying and extending a pipe. 7. Rollers are arranged at appropriate intervals in a tunnel provided underground and at least at the entrance and exit of a ramp connecting the entrance of the underground tunnel to the ground, and are provided continuously at the rear of the ramp. A long pipe manufacturing yard for manufacturing a long pipe by joining a plurality of single pipes to the side of the space is provided with a centering device, a welding device, an inspection device, a joint anticorrosion device, and a long pipe. Means for moving to the elongate space, furthermore, a centering device for joining the moved long pipe to the rear end of the already delivered pipe, a welding device, an inspection device,
A pipe laying device in a tunnel, comprising: a joint portion anticorrosion device; a clamp capable of locking an already delivered pipe; and a pipe moving device for laying and extending an elongated pipe in the tunnel. 8. The apparatus for laying pipes in a tunnel according to claim 7, wherein a plurality of turning rollers are arranged in the long pipe manufacturing yard so that the single pipes can be joined by rotary welding. 9. Rollers are disposed at appropriate intervals in a tunnel provided underground and at least at the entrance and exit of a ramp connecting the entrance of the underground tunnel to the ground, and are long and continuously provided behind the ramp. Centering stage in the space
A long pipe manufacturing site comprising a welding stage, an inspection stage and a joint corrosion prevention stage is provided, and a clamp for locking an already delivered pipe and a pipe moving device for laying and extending an elongated pipe in a tunnel are provided. After setting and centering a single pipe at the rear end of the already delivered pipe in the lengthening space, welding welding, inspection and joint corrosion prevention work are simultaneously performed in each stage, and the lengthened pipe is separated by the length of the single pipe. An apparatus for laying pipes in a tunnel, characterized in that the pipes are repeatedly laid and extended by being repeatedly sent out into an underground tunnel through a ramp.