JP5597112B2 - How to install pipes in the ground - Google Patents

Description

  The present invention relates to a pipe installation method for installing a pipe having a square cross section in the ground.

  Conventionally, a curved pipe with a quadrangular section that extends by bending to draw an arc (a pipe whose central axis is a curve), or a pipe with a quadrangular section that extends straight (a pipe whose central axis is a straight line) ) Is installed in the ground from a hollow portion such as a tunnel hollow portion formed in the ground (see, for example, Patent Document 1). In some cases, an underground space is formed by excavating an underground portion partitioned so that groundwater does not enter by this support work. This underground space is used as, for example, an underground space for forming a subway platform between tunnel segments that form a subway tunnel.

JP 2005-83007 A

However, in the above method, since groundwater flows into the underground part surrounded by the support through the gap between the pipes installed in the ground so as to be adjacent to each other, In the construction of forming an underground space in the underground part surrounded by the support works, the water stop treatment work between the installed pipes is required, resulting in a prolonged construction period and an increase in construction costs.
Moreover, in the said method, although the water stop processing operation | work is performed by all between the pipes installed in the ground so that it may mutually adjoin, the part which cannot obtain a water stop effect tends to arise. For this reason, there is a case where a method of constructing a support work using a shield segment having high cost and excellent water-stopping performance may be employed.
The present invention can reduce the water-stopping work in construction for forming an underground space in the underground part, shorten the construction period, reduce the construction cost, etc., and can construct a support work with a high water-stopping effect. Provide pipe installation methods in the ground.

In the underground pipe installation method according to the present invention, when a pipe having a quadrangular cross section is installed in the ground from a hollow portion formed in the ground, the inside of the top opening side of the pipe that is first put into the ground In the underground pipe installation method in which the excavating machine is installed and the pipe is pushed and the underground is excavated with the excavating machine to install the underground pipe in the ground, the rectangular shape that surrounds the inner surface of the pipe A tube-side propulsive force receiving portion formed by a rectangular frame having a rectangular frame outer peripheral size corresponding to the outer peripheral surface of the rectangular frame and fixed to the inner peripheral surface of the tube; A board formed by a rectangular plate corresponding to the shape, the front surface of which is in contact with the rear surface of the tube-side propulsion receiving portion while maintaining watertightness, a column having one end attached to the center of the front surface of the substrate, and the tip of the column Extending in a direction away from each other on a straight line perpendicular to the extending direction of the column They are respectively connected to the rotary shaft, and a drilling machine having a two rotary drilling member that is configured to rotated about a common one rotational center line orthogonal to the extending direction of the struts used to the head A plurality of pipes with excavating machines installed on the inner side of the opening side are arranged in a direction crossing the propulsion direction of the pipe, and the front surface of the substrate is brought into contact with the rear surface of the pipe-side propulsion receiving portion while maintaining watertightness. Since the plurality of pipes were propelled together by excavating the natural ground in front of the pipes by pressing the substrate while rotating the pipe, the pipes installed in the ground so as to be adjacent to each other If the contact with the pipe is maintained, the water stop portion is formed by the contact between the pipe and the pipe, so the water stop treatment work between the pipe installed in the ground so as to be adjacent to each other is omitted. Can be used to build underground spaces in the underground Stomach, shorten the construction period, it is possible to achieve a reduction or the like of the construction costs, can build a high water stopping effect 支保 Engineering. In addition, even when the underground is hard and mixed, it is possible to excavate the underground portion near the corner inside the pipe with a square cross section with a rotating excavator, and the pipe can be smoothly moved in the ground. To be able to promote.
Since the plurality of tubes are propelled together in a state in which a plurality of tubes are arranged in a direction crossing the tube propulsion direction and the gap between the tubes adjacent to each other is closed, the ground is arranged so that they are adjacent to each other. It is possible to eliminate the water-stopping work between the pipes installed inside, and in the construction to form an underground space in the underground part, it is possible to realize a shortening of the construction period, reduction of construction costs, and the like.
Provided with a propulsive force transmission rod-like body having one end connected to the rear surface of the substrate and the other end projecting backward from the rear end surface of the tube, and each propulsive force transmitting rod shape projecting rearward from the rear end surface of each of the plurality of tubes arranged By installing a length of strut across each other end of the body and pressing the strut with a hydraulic jack, the multiple tubes were pushed together, so that the multiple tubes were simultaneously Can be smoothly promoted.
A fixed excavation body that is arranged in a direction crossing the pipe propulsion direction and that protrudes forward from the top opening of the pipe is provided at the tip of the boundary between the pipes adjacent to each other. The body collides with the ground in front of the boundary between the pipes installed together in the ground and cuts the ground, sorts the earth and sand in the collided ground part, or before the excavation Since it is easy to excavate the ground by inducing cracks, the pipe can be propelled more smoothly.
Since there is a communication hole that is a passage that connects the two pipes through the pipes adjacent to each other and the face plates of the pipes, water is fed into the two adjacent pipes, and the mud is discharged from the two adjacent pipes. The equipment cost can be reduced and it is economical.

Sectional drawing of a pipe | tube installation apparatus (Embodiment 1). The exploded perspective view which decomposed | disassembled and showed the right-and-left head tube (Embodiment 1). The perspective view which showed the right and left head pipe connected (Embodiment 1). The expanded sectional view of a pipe installation device (embodiment 1). The disassembled perspective view which decomposed | disassembled and showed the front pipe | tube to the pipe | tube and the guide blade pipe | tube (Embodiment 1). The figure which looked at the excavation machine inside a pipe | tube from the blade edge | tip side of a guide blade pipe | tube (embodiment 1). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). The perspective view which shows the shape and installation form of a curved pipe (Embodiment 1). Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a straight pipe (embodiment 1). Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a curved pipe (Embodiment 1). The perspective view which shows the pipe | tube installation method which installs a pipe | tube via the departure port provided intermittently in the wall of a tunnel (Embodiment 1). Sectional drawing which shows the water stop process between the pipes installed in the ground so that it may mutually adjoin (Embodiment 1). Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a curved pipe (Embodiment 1). Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a straight pipe (embodiment 1). The figure which looked at the reinforcement body from the cavity part side of the tunnel (embodiment 1). Sectional drawing which shows the relationship between the cavity part of a tunnel, a reinforcement body, and a pipe | tube (Embodiment 1). The perspective view explaining the water stop process for forming underground space (embodiment 1). Sectional drawing explaining the water stop process of the one end side of the underground part in which underground space is formed (Embodiment 1). The figure which shows the various forms of a water stop structure (Embodiment 1). Sectional drawing of a pipe installation apparatus (embodiment 2). Sectional drawing of a pipe installation apparatus (embodiment 3). Sectional drawing of a pipe installation apparatus (embodiment 4). Sectional drawing of a pipe | tube installation apparatus (Embodiment 5). Sectional drawing of a pipe | tube installation apparatus (Embodiment 6). (A) is a perspective view which shows the installation state of the pipe for forming the communicating path as a cavity part between a shaft and a shield tunnel, (b) is an expansion which shows the installation state of the pipe for forming a communicating path A perspective view (Embodiment 7).

Embodiment 1
First, based on FIG. 1 thru | or FIG. 20, the basic composition and operation | movement of the pipe installation apparatus 1 for implement | achieving the pipe installation method in the underground by Embodiment 1 are demonstrated.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2, an excavation device 3, a propulsion device 4, and a propulsion force transmission device 70. In the following, the upper side in FIG. 1 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 1 is defined as the rear side of the tube 2 or the tube installation device 1, and the left and right sides in FIG. The left and right sides of the tube 2 and the tube installation device 1 are defined, and the upper and lower sides in the direction orthogonal to the paper surface of FIG. In FIG. 2, the front side, the rear side, the left side, the right side, the upper side, and the lower side of the pipe 2 and the pipe installation device 1 are clearly shown.

The pipe 2 is a curved pipe (a pipe whose central axis is a curve) formed so as to bend and extend so as to draw an arc as shown in FIG. 9; FIG. 11, or as shown in FIG. A tube that extends straight (a tube having a straight tube center axis (hereinafter referred to as a straight tube)) and has a rectangular cross-section when the tube is cut along a plane perpendicular to the tube center axis. It is formed by. As the pipe 2, for example, a steel pipe is used. The size of the tube 2 is, for example, a tube length (front-rear length) of 1.5 m, a left-right width of 1.2 m, and a vertical width of 0.7 m.
Then, as shown in FIG. 9; FIG. 11, a support work 11 that is bent and extended so as to draw an arc is constructed in the underground 10 by connecting a plurality of bent pipes in order and installing them in the underground 10. As shown in FIG. 10, a support work 11 is constructed in the underground 10 that is straightly extended by connecting a plurality of straight pipes in order and installed in the underground 10.
As shown in FIG. 9, the support 11 constructed in the ground by the pipe installation device 1 and the pipe installation method according to the first embodiment includes a pipe 2 (hereinafter referred to as a top pipe) positioned at the head and a plurality of subsequent pipes. It is formed by the tube 2 (hereinafter, referred to as a subsequent tube). That is, the supporting work 11 is a continuous curved pipe formed by a leading pipe 6 which is a curved pipe located at the leading end and a succeeding pipe 7 which is a plurality of succeeding curved pipes provided so as to follow the leading pipe 6. 67.
As shown in FIG. 11 (a), the support work 11 includes a plurality of bends as a plurality of pipes 2 so as to straddle between one cavity 100 formed in the ground 10 and the other cavity 100. As shown in FIG. 11 (b), a plurality of pipes 2 starting from a cavity 100 formed in the ground 10 and returning to the cavity 100 as shown in FIG. As shown in FIG. 10, a plurality of support pipes 11 constructed by continuously connecting a plurality of bent pipes, and a plurality of pipes 2 as a plurality of pipes 2 so as to straddle between one cavity 100 and the other cavity 100. There is a support 11 constructed by installing straight pipes continuously.

In the underground pipe installation method according to the first embodiment, as shown in FIG. 1, the leading pipe 6 in which a plurality of rotary excavating bodies 46 are installed inside the leading opening 6 t (opening edge 13) is used as the leading pipe 6. A plurality of head pipes 6 are arranged in a direction crossing the propulsion direction, arranged in a direction crossing the propulsion direction of the head pipe 6 and the outer surfaces of the head pipes 6 adjacent to each other are butted together and connected by a connecting means. The plurality of leading pipes 6; 6 are propelled together (simultaneously) in a state where the gaps between them are closed. FIG. 1 shows an example in which two leading pipes 6 each having two rotary excavating bodies 46; 46 installed inside the leading opening 6t side are propelled together.
That is, one face plate (for example, a face plate orthogonal to the rotation center line L of the rotary excavation body 46; 46 (the face plate on either the left or right side of the head pipe shown in FIG. 2) of the face plates of the respective lead pipes 6 each having a rectangular cylindrical shape. Alternatively, a communication hole 90; 90 penetrating the inside and outside of the top pipe 6 is formed in a face plate parallel to the rotation center line L of the rotary excavation body 46; 46 (either the top or bottom face plate of the top pipe shown in FIG. 2). Then, the communicating holes 90 of the leading pipes 6: 6 adjacent to each other are welded to the adjacent leading pipes 6; 6 by abutting one surface of the leading pipes 6: 6 adjacent to each other so that the 90s communicate with each other. The plurality of head pipes 6; 6 connected so as to be adjacent to each other are simultaneously driven by connecting means such as the like.
For example, two leading pipes 6 as shown in FIGS. 4; 5; 6 are prepared and communicated with the left side plate of the right leading pipe 6 and the right side plate of the left leading pipe 6 as shown in FIG. A hole 90 is formed, and as shown in FIG. 3, the left outer surface of the right front pipe 6 and the right outer side of the left front pipe 6 so that the communication holes 90 of the left and right front pipes 6: 6 communicate with each other. The upper end edge of the left outer surface and the upper end edge of the right outer surface are connected by welding, and the lower end edge of the left outer surface and the lower end edge of the right outer surface are connected by welding. By doing so, the left and right front pipes 6; 6 are formed which are arranged in a direction crossing the propulsion direction of the front pipe 6 and are connected in a state in which the gap between the adjacent front pipes 6; 6 is closed. The left and right head pipes 6; 6 connected in this way are simultaneously driven.
In addition, an adhesive, a joining plate, a joining tape, etc. may be used as a connecting means for connecting the leading pipes 6; 6 in which one outer surface is abutted and closing the gaps between the leading pipes 6; .
As described above, the leading pipe 6 adjacent to each other and the face plates of the leading pipe 6 passing through the face plates of the leading pipe 6 are provided with the communication holes 90; 90 serving as a passage connecting the inside of the leading pipe 2; Through the holes 90; 90, excavated soil and water can flow between the adjacent top pipes 2;

  Hereinafter, the configuration of the pipe installation device 1 according to the first embodiment will be described with reference to FIGS. 1 to 3 and FIGS. 4; 5; 6 in which the configuration in the front pipe 6 for one piece is enlarged. .

For example, as shown in FIGS. 4 and 5, the leading tube 6 has a guide blade portion provided on the tip end side of the tube 6x and a guide blade portion provided at the tip of the tube 6x. The blade tube 9 is formed. The guide blade tube 9 is a tube including a blade portion 14 in which one open end edge 13 of the tube is formed sharply. The rectangular inner and outer diameter dimensions on the rear end opening edge surface side of the guide blade pipe 9 and the rectangular inner and outer diameter dimensions on the tip opening edge face side of the pipe 6x are formed to the same dimension. That is, the leading tube 6 is formed such that the rear end opening end surface 17 of the guide blade tube 9 and the front end opening end surface 18 of the tube 6x face each other, and the rear end opening end surface 17 of the guide blade tube 9 and the front end opening end surface of the tube 6x. In this configuration, the guide blade tube 9 is provided at the tip of the tube 6x by connecting the boundary portion to 18 by all-around welding or spot welding. In this case, since the pipe 6x and the guide blade pipe 9 are connected to each other so that no step is generated between the outer surface of the pipe 6x and the outer surface of the guide blade pipe 9, the leading pipe 6 is promoted. In addition, the outer surface of the leading pipe 6 is not subjected to the resistance of the underground 10, and the propulsion resistance can be reduced.
Note that a tube formed on a guide blade portion whose tip side functions as the guide blade tube 9 may be used as the leading tube 6.
And the excavation machine 26 which has the rotary excavation body 46 mentioned later inside the front opening 6t (opening edge 13) side of the front pipe 6 is installed.

  On the inner surface 20 of the pipe of the front pipe 6, a pipe side propulsive force receiving member is provided at a position on the front side of the central portion in the pipe extension direction (the direction along the central axis of the pipe) and behind the communication hole 90. A part 21 is provided. The tube side propulsive force receiving portion 21 receives the propulsive force from the propulsion device 4 via a substrate 25 provided in the excavating device 3 to be described later and propels the top tube 6. The tube-side propulsive force receiving portion 21 is formed to have a rectangular frame outer peripheral dimension corresponding to a rectangular shape that goes around the inner surface of the cross section of the front tube 6 (a cross section when the front tube is cut by a plane orthogonal to the central axis of the front tube). The rectangular frame 22 is formed by the rectangular frame 22, and the rectangular frame 22 is installed in a state where the outer peripheral surface 23 of the rectangular frame 22 and the inner peripheral surface 20 a of the tube of the leading tube 6 correspond to each other. Is fixed to the inner peripheral surface 20a by a connecting means (not shown) such as welding, bolts and nuts.

The excavation apparatus 3 includes a substrate 25, an excavation machine 26, a drive source 27, a water supply mechanism 75, and a mud discharge mechanism 76.
The substrate 25 is formed by a rectangular plate 30 corresponding to a rectangular shape that goes around the inner surface of the cross section of the top tube 6. The size of the rectangular plate 30 is smaller than the rectangular dimension that goes around the inner surface of the cross section of the leading pipe 6 and is larger than the rectangular inner peripheral dimension of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21. Is also big. That is, the rectangular peripheral surface 33 on the front surface 39 f of the rectangular plate 30 that forms the substrate 25 is formed so as to be able to contact the frame rear surface 32 of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21. In addition, between the rectangular peripheral surface 33 in the front surface 39f of the rectangular plate 30 which forms the board | substrate 25, and the frame rear surface 32 of the rectangular frame 22 which forms the tube side thrust receiving part 21, the watertight formed by the elastic body, for example A performance maintaining member (packing) 35 is provided. The watertight performance maintaining member 35 is, for example, a rectangular attached to the rectangular peripheral surface 33 on the front surface 39f of the rectangular plate 30 forming the substrate 25 or the frame rear surface 32 of the rectangular frame 22 forming the tube side propulsive force receiving portion 21. The frame 36 is formed.
One end of a support portion 40 of the excavating machine 26 to be described later is fixed to the center portion of the front surface 39f of the substrate 25.

The excavating machine 26 includes a support unit 40 and a rotating unit 41.
The support portion 40 is formed by a T-shaped hollow column in which one column 42 and two branch columns 43 are combined. For example, a mounting flange (not shown) is provided at one end of the column 42, and the mounting flange is detachably fixed to the center of the front surface 39f of the substrate 25 by a fixing tool such as a bolt and a nut. One end is fixed to the center of the front surface 39f of the substrate 25, and the support column 42 extends in a direction orthogonal to the front surface 39f of the substrate 25. The two branch columns 43 extend in a direction away from each other on a straight line perpendicular to the extending direction of the columns 42 from the tip end portion (the other end portion) of the columns 42. That is, one end of the support column 42 is fixed to the substrate 25 so that the T-shaped hollow path of the support portion 40 communicates with the through hole 38a. A motor mount 44 is provided at each end of the branch column 43.

The rotating unit 41 includes a rotating mechanism unit 45 and a rotating excavator 46.
The rotation mechanism unit 45 is configured by a motor 47, for example. A casing 48 of a motor 47 is fixed to each motor mount 44;
The rotating shafts 49; 49 of the two motors 47; 47 extend in a direction away from each other on a straight line perpendicular to the extending direction of the support column from the tip end portion of the support column 42.
The rotary excavator 46 includes a housing 50 that is closed at one end and the other end, and a plurality of excavation bits (excavation blades) 52 provided on the outer peripheral surface 51 of the housing 50.

  As the motor 47, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used. For example, when a hydraulic motor (hereinafter referred to as a hydraulic motor 47) is used, a pressure hose 56 in which a hydraulic source 55 as the drive source 27 and the casing 48 of the hydraulic motor 47 form a pressure oil supply path 56a and an oil return path 56b. Connected with That is, the pressure hose 56 is connected to the casing 48 of the hydraulic motor 47 through the through hole 38 a and the T-shaped hollow path of the support portion 40. The hydraulic motor 47 is configured such that the rotating shaft 49 is rotated by pressure oil supplied into the casing 48 via the pressure hose 56.

For example, the other end closed inner surface 53 of the casing 50 and the hydraulic pressure are adjusted so that the center of the other end closed inner surface (inner bottom surface of the casing) 53 of the casing 50 of the rotary excavator 46 coincides with the rotation center of the rotary shaft 49. A connecting plate 54 provided at the tip of a rotating shaft 49 rotated by a motor 47 is connected by a connecting tool 57 such as a screw.
In other words, the two rotary excavating bodies 46 are configured to rotate around a single rotation center line L common to the two rotation shafts 49 and 49. That is, the two rotary excavating bodies 46 and 46 that rotate about the rotation center line L orthogonal to the propulsion direction of the leading pipe 6 are provided. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header. When a so-called twin header provided with two rotary excavating bodies 46; 46 rotating around the rotation center line L orthogonal to the propulsion direction of the leading pipe 6 is used, the rotary excavating body 46 in a plane orthogonal to the propulsion direction is used. Therefore, it becomes possible to easily install the pipe 2 having a rectangular width corresponding to the excavation width in the underground 10.

In addition, what is necessary is just to adjust suitably the front-back position of the rotary excavation body 46; 46 by changing the installation position of the pipe side thrust receiving part 21 back and forth.
For example, as shown in FIG. 4, the rotary excavator 46; 46 so that the tip 80 of the excavation bit 52 and the cutting edge 81 of the guide blade tube 9 are located on one plane orthogonal to the central axis of the guide blade tube 9. Although not shown, the rotary excavator 46; 46 is installed so that the tip 80 of the excavation bit 52 protrudes forward from the cutting edge 81 of the guide blade tube 9, or the tip 80 of the excavation bit 52 is The rotary excavator 46; 46 is installed so as to be located in the leading pipe 6.

  If the excavating operation of the rotary excavating body 46; 46 is performed by causing the tip 80 of the excavating bit 52 to protrude forward from the cutting edge 81 of the guide blade tube 9, the ground located in front of the cutting edge of the guide blade tube 9 is excavated. Since the excavation can be surely performed by the bit 52, it is possible to reduce a situation in which the cutting edge 81 of the guide blade tube 9 collides with the hard ground and the leading tube 6 cannot be pushed. For example, the rotary excavator is configured such that the tip 80 of the excavation bit 52 projects forward from the cutting edge 81 of the guide blade tube 9 so that the rotation center axis L and the cutting edge 81 of the guide blade tube 9 are located on the same plane. If the excavation operation by 46; 46 is performed, the ground located in front of the cutting edge of the guide blade tube 9 can be more reliably excavated by the excavation bit 52, and the tube 2 can be more easily propelled. Installation work can be performed more smoothly.

  Further, if the leading pipe 6 is propelled and the rotary excavating body 46; 46 is excavated with the tip 80 of the excavating bit 52 positioned in the leading pipe 6, the guide blade pipe 9 pierced into the ground 10 is used. Since only the underground part that enters the inside of the blade edge is excavated by the excavation bit 52, the excessive excavation part of the underground 10 is reduced, and the influence on the underground 10 such as ground subsidence can be reduced.

A fixed excavator 77 is provided between the rotary excavators 46;
The fixed excavation body 77 is attached in a fixed state to the front outer peripheral surface of the boundary portion between the two branch columns 43; 43 so as to protrude forward from the branch column 43 by fixing means such as welding or bolts and nuts.
The fixed excavation body 77 is formed in, for example, a curved shape in which the central portion between the upper and lower sides bulges toward the cutting edge 81 side of the guide blade tube 9, and the center between the left and right widths of the curved surface is along the circumferential direction of the curved surface. It is the structure formed so that it might become a continuous sharp blade shape.
Thus, since the fixed excavation body 77 has a configuration in which the central portion between the upper and lower sides is formed in a curved shape that bulges toward the cutting edge 81 side of the guide blade tube 9, the resistance of the ground when the leading tube 6 is propelled. Thus, the leading pipe 6 can be more smoothly propelled.

When the fixed excavation body 77 is not provided, the excavated earth and sand may be clogged between the rotary excavation bodies 46; 46, but the fixed excavation body 77 is interposed between the rotary excavation bodies 46; 46. When the fixed excavation body 77 collides with the ground by propelling the head pipe 6, the fixed excavation body 77 cuts the ground or distributes the earth and sand and rocks in the collided ground portion to the left and right. 46:46, the leading pipe 6 can be promoted more smoothly.
For example, as shown in FIG. 1, the center between the upper and lower sides of the fixed excavation body 77, the excavation bit 52 of the rotary excavation body 46, and the cutting edge 81 of the guide blade tube 9 are on the same plane perpendicular to the central axis of the top tube 6. Configured to be located.
In this way, the center between the upper and lower sides of the fixed excavation body 77, the excavation bit 52 of the rotary excavation body 46, and the cutting edge 81 of the guide blade tube 9 are configured to be located on the same plane perpendicular to the central axis of the top tube 6. In this case, as described above, the fixed excavation body 77 can be easily excavated by inducing cracks in the ground prior to excavation, and the fixed excavation body 77 collides with the ground and the top pipe It can also be prevented that 6 is not promoted.

In addition, you may comprise so that the center between the upper and lower sides of the fixed excavation body 77 may be located behind or ahead of the excavation bit 52 of the rotary excavation body 46 and the cutting edge 81 of the guide blade tube 9.
When the center between the upper and lower sides of the fixed excavation body 77 is configured to be located in front of the excavation bit 52 of the rotary excavation body 46 and the cutting edge 81 of the guide blade tube 9 (see FIG. 25), the fixed excavation body 77 is excavated. The effect that it becomes easy to excavate by inducing a crack in the ground prior to the ground is also obtained.
Conversely, if the center between the upper and lower sides of the fixed excavation body 77 is positioned behind the excavation bit 52 of the rotary excavation body 46 and the cutting edge 81 of the guide blade tube 9, excavation is performed when the ground is hard. It can be prevented that the fixed excavation body 77 collides with the ground rather than the cutting edge 81 of the bit or the guide blade tube 9 and the leading tube 6 is not propelled.

Further, since the casing 50 of the rotary excavator 46 is installed away from the left and right inner surfaces of the guide blade tube 9 so as not to contact the left and right inner surfaces of the guide blade tube 9, It may be difficult to excavate the ground between the inner surface.
Therefore, the excavation bit 52 located on the center side of the leading pipe 6 is provided so as to extend in a direction orthogonal to the central axis (center line L) of the housing 50, and as shown in FIG. 4 and FIG. The excavation bit 52a (52) located on the left side of the leading pipe 6 is provided to extend to the left side of the leading pipe 6 as close as possible to the position on the left inner surface of the guide blade pipe 9, and is further located on the right side of the leading pipe 6. The excavation bit 52b (52) is extended to the right side of the leading pipe 6 as far as possible to a position as close to the right inner surface of the guide blade tube 9 as possible. The ground located at the left and right corners of the front pipe 6 can be excavated more effectively.

As shown in FIG. 1, the water supply mechanism 75 includes a water storage tank 75a, a water supply hole 75b penetrating the front surface 39f and the rear surface 39 of the substrate 25, and a water supply pipe constituted by, for example, a bellows tube or a steel tube. 75c, a water pump 75d, and a connecting pipe 75e.
For example, one end of the water supply pipe 75c is connected to the inside of the water supply hole 75b so that the one end opening of the water supply pipe 75c communicates with the space 69 surrounded by the front surface 39f of the substrate 25 and the inner surface 20 of the leading pipe 6. The water supply hole 75b and one end of the water supply pipe 75c are coupled by screwing. The other end opening of the water supply pipe 75c and the discharge port of the water supply pump 75d are connected so as to communicate with each other, and the suction port of the water supply pump 75d and the water storage tank 75a are connected so as to communicate with each other through the connection pipe 75e. Is done.

The mud drain mechanism 76 includes a mud hole 76a penetrating the front surface 39f and the rear surface 39 of the substrate 25, a mud pipe 76b formed of, for example, a bellows tube or a steel pipe, a pump 76c for draining mud, A tank 76d and a connecting pipe 76e are provided.
For example, one end of the mud pipe 76b is screwed inside the mud hole 76a so that the one end opening of the mud pipe 76b communicates with the space 69, so that the mud hole 76a and the mud pipe 76b are connected. One end is joined. The other end opening of the mud pipe 76b and the suction port of the mud pump 76c are connected so as to communicate with each other, and the discharge port of the mud pump 76c and the mud tank 76d can be communicated with each other through the connecting pipe 76e. Connected to

The water storage tank 75a and the waste mud tank 76d are constituted by a collective tank 75X in which the water storage tank 75a and the waste mud tank 76d are integrated. That is, the partition 75w is provided inside the collective tank 75X to divide the collective tank 75X into two regions, one region is used as the water storage tank 75a, and the other region is used as the waste mud tank 76d.
That is, when a certain amount of water is initially filled in the collecting tank 75X, and the water pump 75d is driven to pump water into the space 69, the water pumped into the space 69 and the excavating machine 26 excavate. Muddy water is mixed with the earth and sand. Then, the mud water in the space 69 is discharged into the mud tank 76d by driving the mud pump 76c. Mud in the mud discharged to the waste mud tank 76d settles at the bottom of the waste mud tank 76d, and the mud that has entered the water storage tank 75a beyond the partition 75w is again put into the space 69 by the pump 75d for water supply. Pumped. That is, since the muddy water can be circulated and supplied into the space 69, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied into the space 69, the pressure of the ground and groundwater can be resisted, and the pressure of the ground and groundwater and the pressure in the space 69 can be easily equalized. , The influence on the underground 10 can be reduced. Moreover, since the inside of the space 69 becomes muddy water, the mud can be drained smoothly and excavation is facilitated.

In the first embodiment, the communicating holes 90; 90 of the left and right head pipes 6: 6 are connected to each other so that the surfaces of the left and right head pipes 6: 6 are brought into contact with each other so that the left and right head pipes 6: 6 communicate with each other. And the right and left leading pipes 6; 6 are simultaneously propelled. For example, as shown in FIG. 1, the right leading pipe is used by using a water supply pipe 75c of the right leading pipe 6. The muddy water is supplied into the space 69 of the left head 6 and drained by using the sludge pipe 76b of the left front pipe 6 so that the muddy water passes through the communication holes 90; 90 from the space 69 of the right front pipe 6. It flows also in the space 69 of the left front pipe 6, and the waste mud in the space 69 of the left and right front pipes 6; 6 is discharged to the waste mud tank 76d by driving the pump 76c for waste mud.
And the drainage pipe 76b of the right top pipe 6 and the water supply pipe 75c of the left top pipe 6 are clogged with the water supply pipe 75c of the right top pipe 6 and the sludge pipe 76b of the left top pipe 6. It was used as a spare for use.
In this way, the communicating holes 90; 90 serving as a passage connecting the adjacent leading pipes 2; 2 are provided, and excavated soil and water can flow between the leading pipes 2; 2 through the communicating holes 90; 90. With this construction, mud water can be sent into one head pipe 2 and mud can be discharged via the other head pipe 2, so that the two adjacent top pipes 2; The muddy water supply / drainage route can be made into one system, and the number of pumps 75d for water supply and pumps 76c for wastewater can be minimized, which is economical.
Although not shown, muddy water is supplied into the space 69 of the right head pipe 6 using the water supply pipe 75c of the right head pipe 6 and discharged using the mud pipe 76b of the right head pipe 6. The muddy water is supplied into the space 69 of the left front pipe 6 using the right muddy water supply / drainage path and the water supply pipe 75c of the left front pipe 6, and the mud pipe 76b of the left front pipe 6 is used. You may form the left mud supply drainage route which drains. That is, the muddy water supply / drainage path may be individually configured for each head pipe 6.

The coupling structure between the water supply hole 75b and one end of the water supply pipe 75c and the coupling structure between the mud hole 76a and one end of the mud pipe 76b may be the following coupling structure. An unillustrated pipe portion communicating with the holes (water supply hole 75b, mud drain hole 76a) is formed on the rear surface 39 of the substrate, and the opening end face of the pipe portion and the pipe (water supply pipe 75c, mud drain pipe 76b). In the state where the end face of the open end of the pipe is abutted with each other, the pipe part and the pipe are joined by covering the abutting portion with the annular joint member, or the pipe part is fitted into the pipe through the one end opening of the pipe The pipe part and the pipe are joined by tightening the outer peripheral surface of the one end opening of the pipe with an annular clip member.
The muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the space 69 and the collecting tank 75X by driving the pump 75d for water supply.

  The propulsion device 4 is configured by a hydraulic jack 62, for example. A pressing plate 64 is provided at the tip of the piston rod 63 of the hydraulic jack 62.

The propulsive force transmitting device 70 includes a propulsive force transmitting rod-like body 71, a propelling force transmitting pad 72, the above-described substrate 25, the above-described watertight performance maintaining member 35, and the above-described tube-side propulsive force receiving portion 21. Is provided.
The propulsive force transmission rod 71 has a rod-like body 71x whose length from one end 71a to the other end 71b is longer than the shortest distance between the rear surface 39 of the substrate 25 and the rear end surface 102e of the leading tube 6; A tilt prevention portion 71c that protrudes from the other end 71b side of 71x. The rod-shaped body 71x uses, for example, H-section steel, and the tilt prevention portion 71c uses, for example, a steel material that is joined to the H-section steel forming the rod-shaped body 71x by connection means such as welding or bolts. The tilt preventing portion 71c includes a face body 71d having a surface in contact with the left inner side surface 6a and the right inner side surface 6b of the leading pipe 6.
The propulsive force transmission rod-like body 71 is installed so that the central axis of the rod-like body 71x faces the same direction as the central axis of the leading pipe 6, and the surface of the face piece 71d and the left inner side surface 6a and the right inner side face of the leading pipe 6 The one end 71a and the rear surface 39 of the substrate 25 are joined by connection means such as welding or a bolt so that the surface 6b comes into surface contact.
That is, the left propulsive force transmission rod-shaped body 71A is installed so that the central axis of the rod-shaped body 71x faces the same direction as the central axis of the leading pipe 6, and the surface of the left propulsive force transmission rod-shaped body 71A of the face body 71d One end 71a of the rod-shaped body 71x of the left propulsive force transmission rod-shaped body 71A and the rear surface 39 of the substrate 25 are coupled by a connecting means such as welding or a bolt so that the left inner surface 6a of the leading pipe 6 is in surface contact. . Further, the right propulsive force transmitting rod-shaped body 71B is installed so that the central axis of the rod-shaped body 71x faces the same direction as the central axis of the leading pipe 6, and the surface of the right propulsive force transmitting rod-shaped body 71B of the face 71d One end 71a of the rod-shaped body 71x of the right propulsive force transmitting rod-shaped body 71B and the rear surface 39 of the substrate 25 are coupled by a connecting means such as welding or a bolt so that the right inner surface 6b of the leading pipe 6 is in surface contact. .
One ends 71a; 71a of the left and right propulsive force transmission rod-like bodies 71A; 71B are coupled to the central portion between the upper and lower edges of the substrate 25.

Then, using the abutting material 72 having a length straddling between the other ends 71b of all the propulsive force transmitting rod-like bodies 71 projecting rearward from the rear end surfaces 102e; The material 72 is installed so as to straddle between the other ends 71b of all the propulsive force transmitting rods 71 protruding rearward from the rear end surfaces 102e of the left and right leading pipes. The end 71b is connected with a bolt or a vise not shown. Then, by pressing the portion where the central axis of the leading pipe 6 in the abutting member 72 is pressed by the pressing plate 64 of the hydraulic jack 62, the pressing force by the hydraulic jack 62 is applied to the abutting material 72 and all the propulsive force transmitting rod-like bodies 71. The left and right front pipes 6 and the rotary excavation bodies 46; 46 are propelled forward together because they are transmitted to the front pipe 6 and the rotary excavation bodies 46;
In this case, for example, the left and right propulsive force transmitting rod-like bodies 71A projecting rearward from the rear end surface 102e of the left leading pipe 71A; a portion of the abutting member 72 located at the center between 71B and the rear end face 102e of the right leading pipe The left and right propulsive force transmitting rod-shaped bodies 71A; 71B; the portions of the abutting members 72 located at the center between 71B are individually pressed by the two hydraulic jacks 62. In other words, the hydraulic jacks 62 are used to individually press the portions where the central axes of the leading pipes 6;

  In the first embodiment, in each head pipe 6, the left thrust transmission rod 71 </ b> A, which is one thrust transmission rod, is coupled to the central portion between the upper and lower edges on the left side edge side of the rear surface 39 of the substrate 25. The right propulsive force transmitting rod-shaped body 71B, which is the other propulsive force transmitting rod-shaped body, is coupled to the central portion between the upper and lower edges on the right edge side of the rear surface 39 of the substrate 25, and the individual head pipes 6 arranged in parallel are connected to each other. The strut 72 is installed so as to straddle all of the propulsion force transmission rod-shaped body 71, and the portion where the central axis of each head pipe 6; 6 in the strut 72 is individually pressed by the hydraulic jack 62. Therefore, the pressing force from each of the hydraulic jacks 62; 62 is evenly transmitted to each propulsive force transmitting rod-like body 71 through the contact member 72, so that the pressing force is equally applied to the left and right of each head pipe 6; Allows multiple top tubes ; 6 can be propelled smoothly simultaneously (together) a.

  In the first embodiment, for example, as shown in FIG. 12, the tunnel cavity 100, which is an inner space surrounded by the tunnel wall 111 of the segment tunnel 110 constructed in a cylindrical shape by the segments, extends from the tunnel cavity 100 to the underground 10. When propelling the pipe 2, the starting port 112 of the pipe 2 from the tunnel cavity 100 to the underground 10 is separated by a predetermined interval (for example, about 400 mm to 500 mm) in the direction along the central axis 113 of the segment tunnel 110. The tunnel wall 111 is intermittently provided. As described above, since the start port 112 is intermittently provided in the tunnel wall 111, a segment corresponding to a predetermined interval h remains between the holes 115 adjacent to each other forming the start port 112. A decrease in the structural strength of the tunnel 110 can be reduced.

  For example, as shown in FIG. 12, the starting port 112 is determined such that the length in the direction along the central axis 113 of the segment tunnel 110 corresponds to the length corresponding to the left and right lateral width in which a plurality of tubes 2 are arranged. Are formed so as to be adjacent to each other at a predetermined interval h (for example, about 400 mm to 500 mm) in the direction along the central axis 113 of the segment tunnel 110 (in FIG. The case where the length of the mouth 112 in the direction along the central axis 113 of the segment tunnel 110 is determined so as to correspond to the length of the horizontal width of the three tubes 2 arranged in the drawing is shown).

Further, as shown in FIGS. 16 and 17, the starting port 112 is provided with a reinforcing member 116 made of metal, for example, in order to reinforce the starting port 112. The reinforcing body 116 is formed in a bottomed box shape having an opening at one end, and includes an entrance port 118 through which the pipe 2 enters and exits on the bottom wall 117, and a mounting flange 119 on the opening side of the one end. The mounting flange 119 is provided so as to surround one end opening, and has a facing surface 116b that is continuous with the one end opening edge surface 116a and faces the surface 111a (the inner surface of the segment tunnel 110) on the cavity 100 side of the tunnel wall 111. . The water stop surface 116c is constituted by the one end opening edge surface 116a and the facing surface 116b. The mounting flange in a state where the water stop surface 116c and the surface 111a of the reinforcing body 116 are opposed to each other so as to surround the hole 115 of the starting port 112, and the water tightness maintenance member 116d is sandwiched between the water stop surface 116c and the surface 111a. By attaching 119 to the surface 111a by attaching means such as a bolt 119a, the reinforcing body 116 is fixed to the surface 111a in a state where the watertight performance with the surface 111a is maintained. When the water stop surface 116c is formed as a curved convex surface that can be brought into surface contact with the curved concave surface of the surface 111a, the water stop surface 116c and the surface 111a are maintained at equal intervals, and the water stop performance is improved.
The entrance port 118 has a through-hole 117a formed in a dimension that allows the pipe 2 to pass through the bottom wall 117 of the reinforcing body 116 corresponding to the start port 112, and a through-hole on the inner peripheral surface of the through-hole 117a. A watertight performance maintaining member 117b for maintaining watertight performance with the outer surface of the pipe 2 passing through 117a. The watertight performance maintaining member 117b is formed by an annular rectangular frame centering on the center of the starting port 112.
The entrance port 118 is positioned so that the arc connecting the center line of the entrance port 118 and the center line of the departure port 112 coincides with the travel locus of the tube 2 when the tube 2 is propelled.
In this way, the reinforcing member 116 is fixed to the surface 111a on the cavity 100 side of the wall 111 so as to surround the hole 115 of the starting port 112 by the attaching means, so that the starting member 112 is shaped by the reinforcing member 116, In addition, strength reduction of the segment tunnel 110 is prevented.
Further, since the arc connecting the center line of the entrance port 118 and the center line of the departure port 112 coincides with the traveling locus of the tube 2 when the tube 2 is propelled, the tube 2 is connected to the entrance port 118. In addition, the tube 2 is less likely to swing with respect to the propulsion direction of the tube when passing through the starting port 112, and the tube 2 can be accurately driven so as to pass through the entrance port 118 and the starting port 112.
Further, since the entrance port 118 includes the watertight performance maintaining member 117b, water can be stopped when the tube 2 passes through the entrance port 118, and the propulsion operation of the tube 2 can be performed easily.
The groundwater accumulated in the reinforcing body 116 may be discharged to the outside of the reinforcing body 116 through a drain outlet (not shown) provided in the reinforcing body 116.

  Further, among the pipes 2 that start from the respective departure ports 112 and are installed in the underground 10, as shown in FIG. 13, the tubes 2 located on the left and right hole edges 120; 121 side of the adjacent departure ports 112; 112. The side surface 122 is provided with an inlet 123. And the chemical | medical solution and cement type | system | group injection | pouring agent are injected into the underground 10 located between the side surfaces 122; 122 of the pipe | tube 2 located in the right and left hole edge 120; 121 side of the adjacent starting port 112; 112 from the injection port 123 of the pipe | tube 2. The water stop process W by the injection | pouring process inject | poured or a freezing process etc. is given. When performing an injection process using a packer, which will be described later, the injection port 123 is provided with a check valve (not shown) for preventing the chemical solution or cement-based injection from flowing back into the pipe 2 from the underground 10. Use the tube 2.

Next, with reference to FIG. 7; 8, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
7 and 8, illustration of the segment tunnel 110, the starting port 112, and the reinforcing body 116 is omitted.
First, as shown in FIG. 7A, the left and right head pipes 6: 6 are brought into contact with each other so that the left and right head pipes 6: 6 communicate with each other. 6 is connected by connecting means such as welding. And the board | substrate 25 with which the excavation machine 26, the propulsion force transmission rod-shaped body 71, the water supply pipe 75c, and the waste mud pipe 76b were attached is each installed in the left and right front pipes 6: 6. That is, the rectangular peripheral surface 33 on the front surface 39 f of the rectangular plate 30 that forms the substrate 25 is arranged on the frame rear surface 32 of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21 inside the top tube 6. It is installed so that it is in a state of being pushed through. Accordingly, when the pipe 2 is installed in the underground 10 from the hollow portion 100 formed in the underground 10, the excavating machine 26 is installed inside the leading opening 6t side of the leading pipe 6 that is first inserted into the underground 10. Is done.
And the abutting material 72 is installed so that it may straddle between the other end 71b of all the propulsive force transmission rod-shaped bodies 71 which protrudes back from the rear-end surface 102e of the right-and-left head pipe 6; 6. Further, the other end of the pressure hose 56 of the excavating machine 26 is connected to the hydraulic pressure source 55. And each hydraulic jack 62; 62 is installed in the state which pressed the blade edge | tip 81 of the guide blade pipe | tube tube 9 at the front-end | tip of the top pipe | tube 6 to the ground surface 101, and the press plate 64 provided in the front-end | tip of the piston rod 63 which retracted is installed. It is made to locate in the part in which the center axis | shaft of each front pipe | tube 6; 2 in the contact material 72 is located.
Then, the pump 75d for water supply is driven to supply muddy water into the space 69 of the right top pipe 6 and the space 69 of the left top pipe 6 via the communication hole, and each space of the left and right top pipes 6; 69; The muddy water is circulated between the inside of the collecting tank 75X and the inside of the collecting tank 75X, and the hydraulic pressure is supplied from the hydraulic source 55 to the hydraulic motor 47 by the control of the control device 65 to rotate the rotary excavator 46. When the piston rod 63 of the jack 62 is extended and the portion of the abutting member 72 where the central axis of the leading pipe 6 is positioned is pressed, the propulsive force transmitted to the leading pipe 6 via the propulsive force transmitting device 70 and the rotary excavator 46 By the ground excavation accompanying rotation, the left and right head pipes 6; 6 are propelled forward, and the left and right head pipes 6; 6 are installed in the ground 10.

After the leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, as shown in FIG. 7 (b), the following pipes are respectively connected to the rear end faces 102e; 102e of the left and right leading pipes 6; 6. 7 is welded or connected by a fixture such as a bolt, and the left and right subsequent pipes 7; 7 are brought into contact with each other, and the left and right subsequent pipes 7; 7 are connected by connecting means such as welding. Further, as shown in FIG. 8A, the other end 71b of the leading thrust transmission rod 71 and one end 71a of the following thrust transmission rod 71 are coupled by bolts or welding, thereby leading the leading edge. The following propulsive force transmission rod-shaped body 71 is added behind the propulsive force transmission rod-shaped body 71, and an extended pressure-resistant hose outside the figure is added to the other end of the pressure-resistant hose 56, and the other end of the water supply pipe 75c is illustrated in FIG. An outside extension water supply pipe is added, and an extension mud pipe outside the figure is added to the other end of the mud pipe 76b.
And as shown in FIG.8 (b), the covering material 72 is straddle | crossed between the other ends 71b of all the propulsion force transmission rod-shaped bodies 71 which protrude rearward from the rear-end surface 102e of the right-and-left succeeding pipes 7; 7. The rotary excavator 46 is rotated by driving the digging rotary excavator 46; 46 while pressing the piston rod 63 of the hydraulic jack 62 on the portion where the central axis of the succeeding pipe 7 is located in the abutting member 72. The left and right head pipes 6; 6 are propelled while excavating, and the left and right rear pipes 7; 7 are installed in the ground.
The earth and sand excavated by the rotary excavator 46; 46 in the ground 10 are mixed with water in the space 69 to become muddy water and discharged to the mud tank 76d.
Thereafter, similarly, the rear left and right subsequent pipes 7; 7 are sequentially connected to the rear end edges of the front left and right subsequent pipes 7; The support work 11 as shown can be constructed.
In this case, since the gaps between the rows of the plurality of rows of tubes 2 that are installed in the underground 10 and are adjacent to each other so as to be aligned in a direction intersecting with the propulsion direction of the tubes 2 are blocked by the connecting means, they are adjacent to each other. A water stop portion 91 is formed by a connecting means between the pipe 2 and the pipe 2 installed in the underground 10 so as to fit, and the pipe 2 and the pipe installed in the underground 10 so as to be adjacent to each other. The water stop processing operation between 2 can be omitted.

After the support work 11 is constructed, the excavating machine 26 is pulled back into the starting cavity 100 that is the starting point of excavation and collected. According to the first embodiment, since the propulsive force transmission rod-shaped body 71 is added, when the excavating machine 26 is recovered, one of the propulsive force transmission rod-shaped bodies 71 from the rearmost propulsive force transmission rod-shaped body 71 side. The excavating machine 26 can be easily recovered by pulling back into the cavity 100 by the length and detaching the propelling force transmission rod 71 in order from the rearmost side to the front. In this case, the hydraulic jack 62, which is an example of the propulsion device 4, only needs to be installed in the cavity 100 that is the starting point of excavation, so that the device cost can be reduced.
Note that the excavating machine 26 may be pushed into the cavity 100 on the reaching side and recovered. For example, after the leading pipe 6 is pushed out into the cavity 100 on the reaching side and the pipe-side propulsion receiving part 21 is removed, the excavating machine 26, the substrate 25, and the propelling force transmission rod 71 are placed in the cavity 100 on the reaching side. Extrude and collect. In this case, the operation of pushing the excavating machine 26 into the cavity 100 on the reaching side is easier than the operation of pulling the excavating machine 26 back into the cavity 100 that is the starting point of excavation. It becomes easy. For example, as shown in FIG. 14; FIG. 11 (a); FIG. 15; FIG. 10, when the support 11 is constructed between the left and right cavities 100, the excavating machine 26 is recovered in the arrival-side cavity 100. Alternatively, the left and right cavities 10 may be excavated alternately. In this case, although it is necessary to install the hydraulic jacks 62 as an example of the propulsion device 4 in the left and right cavities 100, the collection work of the excavating machine 26 is facilitated. As shown in FIG. 14 and FIG. 15, it is preferable to provide a reinforcing body 116 also in the arrival port 125 formed in the wall 111 of the segment tunnel 110 forming the cavity 100 on the arrival side.
As shown in FIG. 11B, when the support 11 is constructed so as to start from one cavity 100 formed in the ground 10 and return to the cavity 100, the excavating machine 26 has one cavity. If the excavation machine 26 is recovered by pushing it out of the arrival port into the cavity 100 when the arrival port of the part 100 is reached, the recovery operation of the excavation machine 26 is facilitated and the hydraulic jack 62 is Since it suffices to install only in the cavity 100, the apparatus cost can be reduced.

And, for example, as shown in FIG. 12, the pipe 2 is installed in the ground 10 so as to start from the plurality of starting ports 112; 112. In the underground 10 located between the side surfaces 122; 122 of the pipe 2 adjacent to each other with a gap h, the chemical solution or the like from the inlet 123 of the pipe 2 A water stop treatment unit 130 (see FIG. 18A) is formed by performing a water stop treatment such as an injection treatment for injecting a cement-based injecting agent or a freezing treatment. The injection process is performed by, for example, sealing the space in the pipe 2 near the injection port 123 communicating with the injection port 123 with a check valve by using an injection device called a non-illustrated packer. Or when an operator enters the pipe 2 and moves to the position of the injection port 123, and the operator performs an injection operation of the chemical solution or the cement-based injection through the injection port 123, the chemical solution or the cement system The injection agent is injected into the underground 10 through the injection port 123, and the underground 10 near the injection port 123 is improved in the ground to perform a water stop treatment. The freezing process is performed by, for example, installing a refrigerant pipe (not shown) in the ground 10 through the inlet 123 and circulating the refrigerant in the refrigerant pipe to freeze the ground in the ground 10.
As described above, as shown in FIG. 18 (a), the connection means between the water stop treatment unit 130 formed in the underground 10 and the pipe 2 and the pipe 2 installed in the underground 10 so as to be adjacent to each other. A water-stop structure 131 is formed by the plurality of pipes 2 having the water-stop portion 91.
And the support work 11 which raised the intensity | strength of the pipe | tube 2 is built by filling the pipe | tube 2 with concrete, or arrange | positioning a reinforcing bar and filling concrete as needed.

Further, as shown in FIG. 18 (b), the upper and lower water-stop structures positioned on and facing the end 100e of the cavity 100; 100 (the end in the direction along the central axis 113 of the cavity 100). The end water stop structure 132 is formed so as to cover between the upper and lower end portions 131e; 131e of 131; 131 (see FIG. 18A). This end water stop structure 132 is formed as follows, for example. A through hole 134 through which the injection tube 133 passes is formed in the wall 111 on the end 100e side of the cavity 100; 100, and the injection tube 133 is installed in the ground 10 through the through hole 134. The injection tube 133 has, for example, a plurality of injection ports 135 on the peripheral surface of the tube. And, for example, a plurality of injection pipes 133 are installed radially from the cavity 100 through the through-hole 134, centering on the center of the cross section of the cavity 100, and the plurality of injection pipes 133 installed in the ground 10 are mutually connected. Between the adjacent injection pipes 133 and the injection pipes 133, the water 10 is sealed by a water stop structure 131 from the end 100 e side of the cavity 100; Thus, an end water stop structure 132 that prevents intrusion of groundwater into the underground portion is formed.
Instead of the injection pipe 133, a coolant pipe may be installed in the underground 10, and the water stop treatment unit 136 may be formed by circulating the refrigerant in the refrigerant pipe and freezing the ground in the underground 10.
The injection pipe 133 and the refrigerant pipe are provided between the upper and lower end portions 131e and 131e of the upper and lower water blocking structures 131; 131 straddling between the one hollow portion 100 and the other hollow portion 100 formed in the underground 10. It is arranged so that a water stop treatment part 136 (see FIG. 19A) that sufficiently covers the periphery can be formed, or left and right that start from the cavity part 100 formed in the ground 10 and return to the cavity part 100 It arrange | positions so that the water stop process part 136 (refer FIG.19 (b)) which fully covers the edge part opening 13f; 13f and its periphery of the water stop structure 131; 131 can be formed.

Then, an underground portion 137 surrounded by the water stop structure 131 and the end water stop structure 132 and partitioned so that groundwater does not enter is excavated to form an underground space in the underground 10. In this case, an entrance / exit for an excavating machine (not shown) is formed in the wall 111 of the segment tunnel 110, and the underground portion 137 divided by the water stop structure 131 and the end water stop structure 132 through the entrance / exit. The excavating machine is carried in, and the underground portion 137 is excavated with the excavating machine to form an underground space in the underground 10.
The underground space is used as an underground space for forming a subway platform between the segment tunnel 110 and the segment tunnel 110 forming a subway tunnel, or as an underground space for forming a road branch or junction. Is done.

The underground portion 137 for forming the underground space is not limited to the cylindrical underground region surrounded by the tube 2 and the wall 111, but the tube 2 and the wall 111 installed so as to straddle between the upper portions of the walls 111; 111. And an underground region 137a (see FIG. 20A) in which the lower part of the wall 111; 111 is open, and a pipe 2 and a wall 111 installed so as to straddle the lower part of the wall 111; 111. The underground region 137b (see FIG. 20 (b)) where the upper portion of the wall 111; 111 is opened, or propelled until the top of the top pipe 6 reaches the arrival-side wall 111, It may be an underground region 137c (see FIG. 20C) defined by the water-stop processing unit 138 that has performed water-stop processing between the head and the wall 111, the pipe 2, and the wall 111.
In addition, between the lower part and the upper part of the said open walls 111; 111, for example, the water stop process by inject | pouring a chemical | medical solution from the inside of the cavity part 100 to the underground 10, or along the central axis 113 of the cavity part 100 Water-stopping treatment such as water-stopping treatment is performed by installing a pipe or the like not shown in the figure in the ground.

According to the pipe installation method according to the first embodiment, a plurality of pipes 2 arranged side by side in the direction crossing the propulsion direction of the pipe 2 and the gap between the pipes 2 and 2 adjacent to each other are closed using a connecting means, Since the plurality of pipes 2 are propelled together, a water stop portion 91 having a high water stop effect by the connecting means is provided between the pipes 2 installed in the underground 10 so as to be adjacent to each other. Therefore, it is possible to omit the water-stopping work between the pipes 2 and 2 installed in the underground 10 so as to be adjacent to each other, and in the construction to form an underground space in the underground part, It is possible to shorten the period, reduce construction costs, etc., and build a support work with a high water stop effect.
Further, a plurality of rows of tubes 2 arranged adjacent to each other in a direction crossing the propulsion direction of the tubes 2 can be easily installed, and the water stop portions 91 between the rows of the tubes 2 adjacent to each other can be welded. The connecting means can be surely and easily formed.
Also, since the communication holes 90; 90 serving as a passage connecting the adjacent head pipes 2; 2 are provided, the muddy water supply / drainage path for the two adjacent top pipes 2; The pump 75d for wastewater; the number of pumps 76c for drainage can be minimized, which is economical. That is, it is economical because it is possible to reduce the equipment cost for supplying water into the two adjacent top pipes 2; 2 and discharging the mud from the two adjacent top pipes 2; 2.

According to the first embodiment, the excavating machine 26 having the rotary excavating body 46 that rotates around the rotation center line L that intersects the propulsion direction of the leading pipe 6 is installed inside the leading opening 6 t side of the leading pipe 6. Since the pipe 2 is pushed and the underground is excavated by the excavating machine 26, the pipe 2 is propelled and installed in the underground 10. Therefore, even if the underground 10 is hard and mixed, the cross section is rectangular. Since the underground portion near the inner corner of the shaped pipe 2 can be excavated by the two rotary excavating bodies 46; 46, the pipe 2 can be smoothly propelled in the underground 10 and supported. The work 11 can be easily constructed.
In addition, according to the first embodiment, the rotary excavator includes the rotary excavator 46 that rotates about the rotation center line L that intersects the propulsion direction of the pipe 2, and the excavation bit 52; 52 a of the rotary excavator 46; 52b is provided so as to extend in a direction intersecting the rotation center line L of the rotary excavator 46, and therefore the excavation bit 52; 52a; 52b bites into the underground 10 by the rotation of the rotary excavator 46. The underground 10 is excavated into a semicircular cross section. In comparison with this, when using a drilling machine equipped with a rotary drilling body whose center of rotation is the center axis of the pipe 2 (hereinafter referred to as a comparative example), the tip of the drilling bit is on a plane perpendicular to the center axis of the pipe 2 The ground 10 is excavated into a rectangular cross section by moving so as to draw an arc locus.
That is, in the case of the first embodiment, since the rotation direction of the rotary excavator 46 and the propulsion direction of the pipe 2 are directed in the same direction, the underground 10 is efficiently excavated by scratching the ground with the excavation bits 52; 52a; 52b. On the other hand, in the case of the comparative example, the rotation direction of the rotary excavation body is the direction perpendicular to the propulsion direction of the pipe 2, so that the ground is rubbed with the tip of the excavation bit pressed against the ground. Excavate.
For example, according to the first embodiment, even when the underground 10 is hard and mixed, the ground 10 is efficiently excavated by scratching the ground with the excavation bits 52; 52a; 52b. The excavating machine 26 and the pipe 2 can smoothly travel in the underground 10. On the other hand, when the underground 10 is hard and mixed, according to the comparative example, since the excavation bit is pressed against the ground, the excavating machine and the pipe 2 may not proceed smoothly in the underground 10 as compared with the first embodiment. Conceivable.
Therefore, when comparing the first embodiment with the comparative example, the first embodiment can excavate the underground 10 more efficiently, and the tube 2 can be smoothly advanced in the underground 10.

  According to the first embodiment, the top pipe 6 as a pipe to be put into the ground 10 first is pressed and the ground pipe 10 is excavated by the excavating machine 26, and the back of the top pipe 6 is pushed. Since the plurality of pipes 2 are installed in the ground 10 by sequentially connecting the succeeding pipes 7 to the ends and propelling the leading pipe 6, the central axis using the pipes 2 having a short length in the direction along the central axis Can be easily constructed. For example, even when the internal space of the cavity 100 is narrow, the support work 11 having a long length can be easily constructed by sequentially connecting the plurality of pipes 2. Moreover, since the pipe 2 can be shortened, the handling of the pipe 2 is facilitated and the work can be easily performed.

  According to the first embodiment, a hole 115 provided on a wall 111 surrounding the cavity 100 formed in the underground 10 and serving as a starting port 112 for sending the pipe 2 from the cavity 100 to the underground 10 is intermittently formed in the wall 111. The pipes 2 (curved pipes or straight pipes) are installed in the underground 10 in a plurality of rows from the cavity portion 100 through the starting port 112, and in the ground through the adjacent starting ports 112 and 112. By being installed, the outer surfaces of the tubes 2 installed in the underground 10 so as to be adjacent to each other with an interval h are penetrated into the underground 10 between the tubes 2 so as to penetrate the inside and outside of each tube 2; The water stop processing part 130 which performed the water stop process from the inlet 123 provided in the pipe wall is formed, and the plurality of pipes 2 and the water stop processing part installed so as to be adjacent to the underground 10 with an interval h. 130 and the end part 1 of the water stop structure 131; 131 constituted by 130 1e; Since the underground portion 137 partitioned so that the groundwater does not enter by the end water stop structure 132 formed so as to cover the space between 131e and 131e is formed to form the underground space in the underground 10, It is not necessary to use a special pipe with a simple joint, and the cost and workability of water-stopping treatment when forming an underground space in the underground 10 can be improved, and the cavity 100 for starting the pipe 2 is formed. It is possible to reduce the decrease in the structural strength of the wall 111 to be performed.

In addition, since the start port 112 is intermittently provided in the wall 111, a segment of a predetermined interval h remains between the adjacent holes 115 and the holes 115 forming the start port 112, so that the structure of the segment tunnel 110 It is possible to reduce the decrease in strength, and to the underground 10 located between the side surfaces 122; 122 of the pipe 2 located on the left and right hole edges 120; 121 side of the adjacent start ports 112; 112, the inlet 123 of the pipe 2 Further, since the water-stopping process such as an injection process for injecting a chemical solution or a cement-based injecting agent or a freezing process is performed, the water between the pipes 2 and 2 can be appropriately stopped.
Further, since the reinforcing body 116 is used, the starting port 112 can be shaped and the strength of the segment tunnel 110 can be prevented from being lowered. Further, the reinforcing body 116 is provided so that the arc connecting the center line of the entrance port 118 and the center line of the departure port 112 coincides with the traveling locus of the tube 2 when the tube 2 is propelled. When 2 passes through the entrance port 118 and the start port 112, the tube 2 is less likely to shake with respect to the propulsion direction of the tube, and the tube 2 can be accurately propelled so as to pass through the entrance port 118 and the start port 112. Further, since the entrance port 118 of the reinforcing body 116 includes the watertight performance maintaining member 117b, water can be stopped when the tube 2 passes through the entrance port 118, and the propulsion operation of the tube 2 can be performed easily.

According to the first embodiment, the left thrust transmission rod 71A, which is one thrust transmission rod, is coupled to the central portion between the upper and lower edges on the left edge side of the rear surface 39 of the substrate 25, and the other thrust transmission. The right propulsive force transmitting rod-shaped body 71B, which is a rod-shaped body, is coupled to the central portion between the upper and lower edges on the right edge side of the rear surface 39 of the substrate 25, and the left and right propulsive force transmitting rod-shaped bodies 71A; The front pipe 6 is propelled by pushing at 62, and the left and right propulsive force transmission rod-like bodies 71A; 71B are sequentially added to the left and right propulsive force transmission rod-like bodies 71A; The right and left propulsive force transmission rods 71A and 71B are sequentially pressed by the hydraulic jack 62 to sequentially propel the succeeding pipe 7, so that a pressing force is evenly applied to the left and right of the leading pipe 6 and the succeeding pipe 7. Preparative will be able to, the head pipe 6 and subsequent tube 7 can be straight precisely propel propulsion direction of the appointment.
Further, the propulsive force transmission rod-like body 71 includes an inclination preventing portion 71c having a face body 71d that is in surface contact with the left inner side surface and the right inner side surface of the leading pipe 6 and the succeeding pipe 7. When the pressing force from the hydraulic jack 62 is applied, the propulsive force transmission rod 71 can be prevented from tilting to the left inner surface side or the right inner surface side of the leading pipe 6 or the succeeding pipe 7. The pressure can be reliably transmitted to the substrate 25.

  Further, according to the first embodiment, the water supply mechanism 75 for supplying water into the space 69 and the mud drain mechanism 76 for discharging the mud in the space 69 are provided, and the water storage tank 75a and the mud tank are provided. Since the collecting tank 75X integrated with 76d is used, when the pipe 2 is propelled, the muddy water is circulated by driving the pump 75d for water supply and the pump 76c for waste mud by a control device (not shown). Since the water can be supplied into the space 69, the amount of water used can be reduced, and the pressure of the ground and groundwater and the pressure in the space 69 can be easily equalized. The influence can be reduced, and the inside of the space 69 becomes muddy, so that the mud can be drained smoothly and the effect of facilitating excavation can be obtained.

In the first embodiment, after the succeeding tube 7 is connected to the rear end surface 102e of the tube 2, the following propulsive force transmitting rod-shaped body is added behind the propelling force transmitting rod-shaped body 71 (FIG. 7B). ; FIG. 8 (a)), conversely, after the subsequent thrust transmission rod 71 is added behind the thrust transmission rod 71, the subsequent tube 7 is connected to the rear end face 102e of the tube 2. Good.
When the succeeding tube 7 is connected to the rear end surface 102e of the pipe 2 after the succeeding propelling rod 71 is added behind the propelling rod 71, the succeeding tube from the rear of the succeeding propelling rod 102 is added. 7 has to be moved to the rear end face 102e of the pipe 2 after it is placed, a rear space for placing the succeeding pipe 7 is required behind the succeeding propulsion force transmitting rod-like body that has been added, and the pipe is moved. However, it is possible to easily connect the propulsive force transmission rods. On the other hand, after connecting the succeeding tube 7 to the rear end surface 102e of the tube 2, if the succeeding thrust transmission rod-like body is added behind the thrust transmission rod-like body 71, the above-described rear space can be reduced, and The tube can be moved easily.

  If a reinforcing body provided with a reinforcing portion fixed to the surface 111a on the cavity portion 100 side of the wall 111 so as to surround the hole 115 of the starting port 112 is used, the starting port 112 is shaped and the segment tunnel 110 is used. Therefore, a reinforcing body that does not include the entrance port 118 and the in-hole cylindrical portion 127 may be used.

Embodiment 2 (Other example 1 of the propulsion method of the pipe 2)
In the first embodiment, the excavating machine 26 is fixedly provided on the substrate 25 that receives the propulsive force, and the tube-side propulsive force receiving portion 21 that receives the propulsive force via the substrate 25 is provided on the inner surface of the leading pipe 6. The configuration in which the excavating machine 26 and the pipe 2 are propelled together, that is, the configuration in which the base plate 25 is pushed and the excavating machine 26 and the pipe 2 are propelled together (simultaneously) is shown. The pipe 2 and the excavating machine 26 may be propelled together.
That is, as shown in FIG. 21, a rectangular frame that transmits the propulsive force transmitted to the tube 2 to the inner peripheral surface 20 a of the tube of the leading tube 6, facing the outer peripheral side surface of the rear surface 39 of the substrate 25, to the substrate 25. The propulsion force transmitting body 710 is fixed by a fixing means such as welding or bolts and nuts, and the hydraulic jack 620 as the propulsion device 4 pushes the rear end face 102e of the pipe 2 so that the pipe 2 is propelled. The driving force transmitting body 710 transmits the driving force to the substrate 25 and the excavating machine 26 propels it.
The substrate 25 is disposed so that the central axis of the leading tube 6 and the central axis of the substrate 25 coincide with each other, and is provided so as to be movable in the longitudinal direction in the leading tube 6. The substrate 25 is formed by a rectangular plate 30 corresponding to a rectangular shape that goes around the inner surface of the cross section of the top tube 6. The size of the rectangular plate 30 is smaller than the size of a rectangle that goes around the inner surface of the cross section of the leading pipe 6 and larger than the inner peripheral size of the rectangular frame of the propulsive force transmitting body 710. That is, the rectangular peripheral surface on the rear surface 39 of the rectangular plate 30 that forms the substrate 25 and the front surface of the rectangular frame of the propulsive force transmitting body 710 are formed to face each other. A watertight performance maintaining member (packing) 350 similar to the watertight performance maintaining member 35 described above is provided between the outer peripheral side surface of the rear surface 39 of the substrate 25 and the rectangular annular propulsive force transmitting body 710. That is, the watertight performance maintaining member 350 is formed by a rectangular frame attached to the rectangular peripheral surface of the rear surface 39 of the rectangular plate 30 that forms the substrate 25 or the front surface of the rectangular frame that forms the propulsive force transmitting body 710, for example. Is done. Therefore, the propulsive force transmitted to the pipe 2 is transmitted to the substrate 25 through the propulsive force transmitting body 710 and the watertight performance maintaining member 350, whereby the pipe 2 and the excavating machine 26 are propelled together.
In order to prevent the rear end surface 102e of the pipe 2 from being deformed by the pressing force from the pressing plate 64, the pressure plate 64 at the front end of the piston rod 63 of the hydraulic jack 620 and the rear end surface 102e of the pipe 2 are used. A not-shown face plate is interposed between them, or the outer surface of the pipe 2 receives the pressing plate 64 at the tip of the piston rod 63 of the hydraulic jack 620 and transmits the propulsive force from the hydraulic jack 620 to the pipe 2. A propulsive force transmission body may be provided. When a non-illustrated propulsive force transmission body is provided on the outer surface of the tube 2, the propulsive force transmission body may be removed when the portion of the propulsive force transmission body comes immediately before the inlet of the reinforcing body 116.

In the second embodiment, as in the first embodiment, the hydraulic jack 620 is driven and the rear end surface 102e of the leading pipe 6 is pressed while rotating the rotary excavator 46, whereby the leading end via the propulsive force transmission device 70 is achieved. The leading pipe 6 is propelled forward by the propulsive force transmitted to the pipe 6 and the ground excavation accompanying the rotation of the rotary excavating body 46, and the leading pipe 6 is installed in the ground 10.
After the front pipe 6 is installed in the ground 10 leaving the rear end face 102e of the front pipe 6, the subsequent pipe 7 is connected to the rear end face 102e of the front pipe 6 by welding or a fixture such as a bolt. In the same manner as in No. 1, an extension pressure hose and extension mud pipe are added. Then, while rotating the rotary excavator 46, the hydraulic jack 620 is driven to press the rear end face 102 e of the succeeding pipe 7, so that the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe 7. Is installed in the ground.
In the case of the second embodiment, the excavating machine 26 is collected by pushing it out to the cavity 100 on the arrival side or collecting the excavating machine 26 after pushing the leading pipe 6 into the cavity 100 and removing the propulsive force transmission body 710. Pull back to the side cavity 100 and collect.

According to the second embodiment, it is only necessary to connect the succeeding tube 2 to the previous tube 2 and press the rear end surface 102e of the tube 2 with the hydraulic jack 620 as the propulsion device 4, and to add the propulsive force transmission rod-shaped body 71. Since it is unnecessary, the configuration of the propulsive force transmission device 70 can be simplified.
In the second embodiment, the outer periphery of the substrate 25 and the inner peripheral surface 20a of the top tube 6 may be connected by a connecting means such as welding. If the outer periphery of the substrate 25 and the inner peripheral surface 20a of the leading pipe 6 are connected to each other in a watertight state by welding all around, the watertight performance maintaining member 350 can be eliminated.

Embodiment 3 (Other example 2 of the propulsion method of the pipe 2)
As shown in FIG. 22, the pipe 2 and the base plate 25 to which the excavating machine 26 is fixed are configured to be propelled individually, and the base plate 25 and the pipe 2 are individually propelled by separate hydraulic jacks 62 and 621. Configured to be able to.
In other words, a hydraulic jack 62 for propelling the excavating machine 26 and a hydraulic jack 621 for propelling the pipe 2 are provided separately, and the hydraulic jack 62 and the hydraulic jack 621 are separately controlled, thereby excavating machine. 26 and the pipe 2 can be propelled independently.
In the third embodiment, the substrate 25 is provided so as to be movable in the front-rear direction in the top tube 6, and the rectangular outer peripheral surface 331 of the rectangular plate 30 forming the substrate 25 is between the inner peripheral surface 20 a of the top tube 6. A watertight performance maintaining member (packing) 351 made of, for example, an elastic body is provided to maintain the watertightness of the water. That is, the inner surface of the watertight performance maintaining member 351 formed by the annular rectangular frame 36 centering on the center of the substrate 25 and the rectangular outer peripheral surface 331 of the substrate 25 are brought into contact with each other, and the two are bonded with, for example, an adhesive. Thus, the watertight performance maintaining member 351 is attached to the rectangular outer peripheral surface 331 of the substrate 25, and the watertight performance maintaining state in which the annular outer surface of the annular watertight performance maintaining member 351 and the inner peripheral surface 20a of the pipe of the leading pipe 6 are in contact with each other. The substrate 25 is configured to be movable along the central axis of the leading tube 6, so that the rectangular outer peripheral surface 331 of the substrate 25 and the tube of the leading tube 6 from the space 69 inside the leading tube 6 divided by the substrate 25. It is possible to prevent water from flowing into the cavity 100 via the inner peripheral surface 20a.
The annular watertight performance maintaining member 351 may be attached to the inner peripheral surface 20a of the leading pipe 6.
In the third embodiment, an excavating machine that imparts a propulsive force to the substrate 25 serving as a propulsive force receiving portion by a hydraulic jack 62 as the propulsion device 4, a contact member 72 for transmitting a propulsive force, and a propelling force transmitting rod-like body 71. Propulsive force supply means is configured.
Further, the hydraulic jack 621 as the propulsion device 4 functions as a tube propulsion force supply unit that supplies a propulsion force to the tube 2 by pressing the rear end surface 102 e of the tube 2 with the pressing plate 64.

In the third embodiment, one end 71a of the propulsive force transmission rod-like body 71 is connected to the rear surface 39 of the substrate 25, and the contact member 72 is installed so as to straddle between the other ends 71b of the propulsion force transmission rod-like bodies 71; 71. While rotating the rotary excavator 46, the hydraulic jack 62 as the propulsion device 4 is driven to press the abutting material 72 to propel the substrate 25 and the excavating machine 26, and the hydraulic jack 621 as the propulsion device 4 is driven. Then, by pushing the rear end surface 102e of the leading pipe 6 to propel the leading pipe 6, excavation is performed by the propulsion force transmitted to the excavating machine 26 and the leading pipe 6 and the ground excavation accompanying the rotation of the rotary excavating body 46. The machine 26 and the leading pipe 6 are propelled forward, and the leading pipe 6 is installed in the ground 10.
After the leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, the succeeding pipe 7 is connected to the rear end face 102e of the leading pipe 6 by welding or a fixture such as a bolt, By connecting the other end 71b of the leading propulsive force transmitting rod 71 and one end 71a of the following propelling force transmitting rod 71 by bolts or welding, the subsequent propulsive force transmitting rod 71 is connected to the rear of the succeeding propulsive force transmitting rod 71. The propulsive force transmission rod-like body 71 is added, and the succeeding tube 7 is further connected to the rear end surface 102e of the succeeding tube 7 by welding or a fixture such as a bolt. Add mud pipes. Then, while rotating the rotary excavator 46, the hydraulic jack 62 is driven to propel the substrate 25 and the excavating machine 26, and the hydraulic jack 621 is driven to press the rear end face 102e of the succeeding pipe 7 to thereby move the leading pipe. By propelling 6, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe 7 is installed in the ground.
In the case of the third embodiment, the excavating machine 26 is pulled back into the cavity 100 on the starting side and collected, or is pushed out and collected into the cavity 100 on the reaching side.

According to the third embodiment, since the excavating machine propulsion force supply means and the pipe propulsion force supply means are individually provided, the front and rear positions of the rotary excavator 46; 46 can be freely set with respect to the cutting edge 81 of the guide blade tube 9. become able to. That is, the excavating machine 26 can be moved from the position inside the leading opening 6t side of the leading pipe 6 to a position ahead of the leading end opening 6t of the leading pipe 6 and the excavating machine 26 can be moved from the leading end opening 6t of the leading pipe 6. It can be moved from the front position to the inside of the leading pipe 6.
For example, when the cutting edge 81 of the leading end of the leading pipe 6 collides with the hard ground and the leading pipe 6 stops propelling, the excavating operation is performed by the rotary excavating body 46; 46 while operating the hydraulic jack 62. Since the rotary excavator 46; 46 of the excavating machine 26 is propelled while excavating the ground at a position in front of the tip opening 6t of the leading pipe 6, the pipe 2 can be smoothly propelled in the underground 10. .
In addition, by performing the propulsion operation of the leading pipe 6 and the excavating machine 26 and the excavating operation by the rotary excavator 46; 46 with the excavating machine 26 positioned in the leading pipe 6, the ground that has entered the inside of the leading pipe 6 is obtained. Since only the middle part is excavated by the rotary excavation body 46; 46, the excessive excavation part of the underground 10 is reduced, and the influence on the ground such as ground subsidence can be reduced.
Thus, in the first embodiment, the position of the rotary excavator 46; 46 in the front-rear direction along the central axis of the leading pipe 6 with respect to the leading pipe 6 depending on the ground conditions and the propulsion operation of the leading pipe 6. As described above, the pipe 2 can be smoothly promoted in the underground 10 and the influence on the underground 10 such as ground subsidence can be reduced.
In addition, since there is no projecting object protruding in the direction of the central axis of the leading pipe 6 on the inner surface of the leading pipe 6, the work of collecting the substrate 25 with the excavating machine 26 fixed by pulling it back to the starting port 112 side, The work of pushing out and collecting is easy.

Embodiment 4 (Other example 3 of the propulsion method of the pipe 2)
The excavating machine 26 and the pipe 2 may be configured to be propelled individually, and the excavating machine 26 and the pipe 2 may be propelled together.
That is, as shown in FIG. 23, the substrate 25 is provided so as to be movable in the front-rear direction in the top tube 6, and the watertight performance described above is provided between the outer peripheral surface of the substrate 25 and the inner peripheral surface 20a of the tube 2. An annular watertight performance maintaining member (packing) 352 similar to the maintaining member 350 is provided. The other end 71b of the propulsive force transmission rod 71 and the rear end surface 102e of the tube 2 are aligned so as to be positioned on one plane orthogonal to the central axis of the tube 2, and the propulsion force transmission rod By placing the contact member 720 so as to straddle the other end 71b of the tube 71 and the rear end surface 102e of the tube 2, and driving the hydraulic jack 622 as the propulsion device 4 to press the contact member 720, the tube 2 and the substrate 25 and propelled together.

According to the fourth embodiment, one end 71a of the propulsive force transmission rod-like body 71 is connected to the rear surface 39 of the substrate 25, and the contact member 720 is installed so as to straddle between the other ends 71b of the propulsion force transmission rod-like bodies 71; 71. While rotating the rotary excavator 46, the hydraulic jack 622 is driven to simultaneously press the rear end surface 102e of the front pipe 6 and the propelling force transmission rod 71 through the abutting member 720. The excavating machine 26 and the leading pipe 6 are propelled forward by the propulsive force transmitted to the rotary excavator 6 and the ground excavation accompanying the rotation of the rotary excavating body 46, and the leading pipe 6 is installed in the ground 10.
After the leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, the succeeding pipe 7 is connected to the rear end face 102e of the leading pipe 6 by welding or a fixture such as a bolt, By connecting the other end 71b of the leading propulsive force transmitting rod 71 and one end 71a of the following propelling force transmitting rod 71 by bolts or welding, the subsequent propulsive force transmitting rod 71 is connected to the rear of the succeeding propulsive force transmitting rod 71. The propulsive force transmission rod 71 is added. At this time, the other end 71 b of the propelling force transmission rod 71 and the rear end face 102 e of the pipe 2 are aligned so as to be positioned on one plane orthogonal to the central axis of the pipe 2. Further, similarly to the first embodiment, the extended pressure hose and the extended sludge pipe are added. Then, while rotating the rotary excavator 46, the hydraulic jack 622 is driven to simultaneously press the rear end surface 102 e of the succeeding pipe 7 and the propulsion force transmission rod 71 through the contact member 720, The excavating machine 26 and the leading pipe 6 are propelled forward by the propulsive force transmitted to the leading pipe 6 and the ground excavation accompanying the rotation of the rotary excavating body 46, and the trailing pipe 7 is installed in the ground.

  According to the fourth embodiment, the pressing force by one hydraulic jack 622 can be transmitted to both the base plate 25 and the pipe 2 via the contact member 720. Therefore, the hydraulic jack that presses the base plate 25 and the hydraulic jack that presses the pipe 2 are used. Need not be prepared separately, and the cost of the drive source can be reduced. In addition, since there is no projecting object protruding in the direction of the central axis of the leading pipe 6 on the inner surface of the leading pipe 6, the work of collecting the substrate 25 with the excavating machine 26 fixed by pulling it back to the starting port 112 side, The work of pushing out and collecting is easy.

Embodiment 5
As shown in FIG. 24, the substrate 25 is a rectangular tube having a long dimension in the direction along the central axis of the leading pipe 6 and an outer dimension corresponding to the inner diameter dimension of the rectangular cross section of the pipe 2. It is good also as a structure provided with the part 25A. And in order to maintain the watertight performance between the cylinder outer peripheral surface 25a of the cylinder part 25A and the inner peripheral surface 20a of the leading pipe 6, the watertight performance maintenance formed by the annular rectangular frame centering on the center of the substrate 25 is provided. It was set as the structure provided with the member 25b. One or more watertight performance maintaining members 25b may be attached to either the cylinder outer peripheral surface 25a of the cylinder portion 25A or the inner peripheral surface 20a of the top pipe 6. 26 illustrates an example in which the configuration of the fifth embodiment is applied to the configuration of the first embodiment of FIG. 1, the configuration of the fifth embodiment can also be applied to the configurations of the second, third, and fourth embodiments.
According to the fifth embodiment, when the substrate 25 is propelled by using the substrate 25 including the cylinder portion 25A having the cylinder outer peripheral surface 25a whose length in the direction along the central axis of the substrate 25 is long. The propulsion direction of the substrate 25 and the central axis of the leading tube 6 can be maintained in parallel, and the substrate 25 can be propelled in parallel along the central axis of the leading tube 6, so that the substrate 25 can be easily propelled. . That is, when the substrate 25 is propelled, it is possible to prevent a situation in which the central axis of the substrate 25 is inclined with respect to the central axis of the top tube 6 and it is difficult to propel the substrate 25 in the propulsion direction.
In addition, since the propulsion direction of the substrate 25 and the central axis of the leading tube 6 can be maintained in parallel, the watertight performance by the watertight performance maintaining member 25b between the cylinder outer peripheral surface 25a of the substrate 25 and the inner peripheral surface 20a of the leading tube 6 is achieved. Therefore, the excavating machine 26 and the pipe 2 can be individually propelled so that the groundwater does not flow into the cavity 100 through the pipe 2, and the wastewater treatment work in the cavity 100 can be performed. The burden can be reduced.
It is preferable to provide a plurality of annular watertight performance maintaining members 25b at predetermined intervals in the direction along the cylindrical outer peripheral surface 25a and the central axis of the tube 2 because the watertightness can be further improved.

Embodiment 6
As in the above-described embodiments, the left and right head pipes 6; 6 are welded by butting one surface of the left and right head pipes 6: 6 so that the left and right head pipes 6: 6 communicate with each other. In this method, the left and right leading pipes 6; 6 are simultaneously propelled, as shown in FIG. 25, as shown in FIG. 81) is provided with a fixed excavation body 78 protruding forward from the front opening 6t of the left and right front pipes 6; 6. The fixed excavation body 78 is attached to the tip portion by welding, for example, or detachably attached to the tip portion by a fixing tool such as a bolt and a nut.

  According to the sixth embodiment, as the left and right head pipes 6; 6 are simultaneously propelled, the fixed excavated body 78 collides with the ground in front of the boundary portion between the head pipes 6; Since the sand and rocks in the impacted ground part are distributed to the left and right to be directed to the left and right rotary excavation bodies 46:46, or to induce cracking in the ground prior to excavation, it is easy to excavate. 6; 6 and the succeeding pipe 7; 7 can be more smoothly propelled.

Embodiment 7
In the present invention, as shown in FIG. 26 (a), one cavity 100 is formed by a shaft 140 formed from the ground toward the underground 10, and the other cavity 100 is surrounded by a segment 141 of a shield tunnel. In the case where the shield tunnel 142 is formed, the present invention can also be used when the communication path 143 is formed as an underground space that allows the inside of the shaft 140 and the shield tunnel 142 to communicate with each other. In this case, a straight pipe is used as the pipe 2, and the cylindrical wall 144 as shown in FIG. 26B is constructed by installing the pipe 2 straightly between the shaft 140 and the shield tunnel 142. Then, the inside of the wall 144 is excavated to form a communication path 143 as an underground space.

Embodiment 8
In each of the above embodiments, the plurality of tubes 2 are arranged in a state in which a plurality of tubes 2 are arranged in a direction intersecting with the propulsion direction of the tubes 2 and the gaps between the tubes 2 and 2 adjacent to each other are closed by connecting means. Although a mode of propelling together is shown, a plurality of tubes 2 adjacent to each other are arranged and propelled together in a crossing direction without closing the gap between the tubes 2 adjacent to each other with a connecting means. May be.
Even in this case, if the contact between the pipe 2 and the pipe 2 installed in the underground 10 so as to be adjacent to each other is maintained, the water stop portion 91 is formed by the contact between the pipe 2 and the pipe 2, In the construction of underground space in the underground part, it is possible to omit the water-stopping work between the pipes 2 and 2 installed in the ground so as to be adjacent to each other. Reductions can be realized.

In addition, you may use the excavation machine 26 provided with the rotary excavation body 46 or 3 or more.
Further, the excavating machine 26 is provided with the excavating bit 52 on the side surface of the casing 50 that contacts the underground side of the rotary excavating body 46, and if the rotary excavating body 46 can excavate the inside of the open end 8 of the pipe 2, the leading pipe 6 A rotary excavator 46 that rotates about a rotation center line that intersects the propulsion direction may be provided.

  The tip shape of the fixed excavation bodies 77 and 78 is formed by colliding with the ground by propulsion of the head pipe 6, thereby cutting the ground or distributing the earth and sand and rocks in the collided ground portion to the left and right. It may be formed in a shape that can achieve the role of directing to 46, or inducing cracks in the ground prior to excavation to facilitate excavation. For example, as described above, the front tip may be formed in a sharp cutting edge shape, or the front tip may be formed in a plane shape, and the shape is such that the ground is easily excavated and broken depending on the geology of the ground. Should be selected.

  Also, do not connect the following pipe to the rear end of the pipe that goes into the ground first, and install only the pipe that goes into the ground first from the cavity formed in the ground, and It is also possible to form a support with only the pipes to be put into the pipe (that is, one pipe). In other words, the pipe straddling the one cavity portion 100 and the other cavity portion 100 may be formed by a single tube.

  As the excavating machine, a water jet device (high pressure water injection device), a rotary excavator having the central axis of the pipe 2 as a rotation center, or the like may be used.

Moreover, the pipe | tube 2 should just be a thing with a square cross-sectional shape. In addition, the cross-sectional shape referred to in the present invention is a quadrangular shape including a shape in which square corners are chamfered.
That is, if the cross-sectional shape is a rectangular pipe, it is preferable to use the excavating machine 26. However, if a square-shaped cross section is used, a water jet device (high-pressure water injection device) is used as the excavating machine. Alternatively, a rotary excavator having the center axis of the pipe 2 as the center of rotation may be used, or these may be used in combination. For example, a rotary excavator having the center axis of the pipe as the center of rotation is installed at the center of the front opening of the top pipe 6, and an injection nozzle of a water jet device is installed at the corner of the front opening of the top pipe 6.

  The cavity 100 of the present invention is formed by a cavity surrounded by a shield tunnel segment, a tunnel cavity surrounded by a mountain tunnel wall, or a space in a shaft. And as underground space formed by the present invention, the space forming the above-mentioned subway platform, the forward space and the return space in the tunnel road and railroad, the junction or branching portion in the tunnel road and railroad, the tunnel road and There are a widened portion in the track, the communication path 143 described above, and the like.

The above-described tube-side propulsive force receiving portion 21 also functions as an excavation machine shake preventing portion provided so as to protrude from the inner surface 20 of the tube of the leading tube 6. The excavation machine shake prevention unit regulates the forward movement of the substrate 25, and the central axis of the substrate 25 that passes through the center of the substrate 25 and extends along the central axis of the leading tube 6 is the leading tube 6. By receiving the substrate 25 so as not to tilt with respect to the central axis, the excavating machine 26 is prevented from shaking.
The excavation machine shake prevention unit is provided in a rectangular shape along the inner peripheral surface 20a of the pipe of the leading pipe 6 to restrict the forward movement of the substrate 25, and is a rectangular frame plane orthogonal to the central axis of the leading pipe 6 Is provided.
As shown in FIG. 1, when a watertight performance maintaining member 35 is interposed between the excavating machine shake preventing portion and the substrate 25, the substrate 25 is rectangular in the excavating machine shake preventing portion via the watertight performance maintaining member 35. By being pressed against the frame plane, the central axis of the substrate 25 is prevented from being inclined with respect to the central axis of the leading pipe 6, and the excavation machine 26 is prevented from shaking.
As shown in FIGS. 22 and 23, when the watertight performance maintaining members 351 and 352 are attached to the rectangular outer peripheral surface 331 of the substrate 25 or the inner peripheral surface 20a of the top pipe 6, the substrate 25 is not shaken by an excavating machine not shown. By being pressed against the rectangular frame plane of the prevention portion, the central axis of the substrate 25 is prevented from being tilted with respect to the central axis of the leading pipe 6, and the excavation machine 26 is prevented from shaking.
That is, the excavating machine shake prevention unit receives the substrate 25 and maintains the front surface 39f of the substrate 25 on a surface orthogonal to the central axis of the top tube 6 so as to be orthogonal to the front surface 39f from the center of the front surface 39f of the substrate 25. The excavating machine 26 is prevented from being shaken by providing the function of maintaining the center axis of the support column 42 provided in the center and the center axis of the leading pipe 6 so as to coincide with each other. Therefore, the rotary excavation body 46: 46 of the excavating machine 26 excavates the underground 10 in a state where the excavating posture of the excavating machine 26 is maintained so that the central axis of the substrate 25 does not tilt with respect to the central axis of the leading pipe 6. Therefore, the planned position of the underground 10 can be excavated correctly, and the pipe 2 can be accurately installed at the planned installation position.
The excavating machine shake prevention unit receives the substrate 25 pressed by the hydraulic jack 62 and maintains the front surface 39f on the inner peripheral surface 20a of the pipe of the leading pipe 6 so that the front face 39f can be maintained in a plane orthogonal to the central axis of the leading pipe 6. What is necessary is just to set it as the structure provided in at least 2 or more places. For example, the excavation machine shake prevention portion is provided so as to protrude separately from the left and right side surfaces or the upper and lower surfaces of the rectangular inner peripheral surface 20a of the pipe of the leading pipe 6 and receives the front surface 39f of the substrate 25. Alternatively, a configuration having lines or points may be used.

2 pipes, 6 top pipes, 10 underground, 26 excavating machines, 46 rotating excavated bodies,
78 Fixed excavated body, 100 cavity, L rotation center line.

Claims (5)

When installing a pipe with a square cross-section into the ground from a cavity formed in the ground, an excavating machine is installed inside the top opening side of the pipe to be put into the ground first, and the pipe is pressed and drilled. By excavating the underground with a machine, the pipe is installed in the ground by propelling the pipe,
A tube-side propulsive force receiving portion formed by a rectangular frame having a rectangular frame outer peripheral size corresponding to a rectangular shape that goes around the inner surface of the tube, and the outer peripheral surface of the rectangular frame being fixed to the inner peripheral surface of the tube; ,
A substrate that is formed by a rectangular plate corresponding to a rectangular shape that goes around the inner surface of the tube and that the front surface is in contact with the rear surface of the tube-side propulsive force receiving portion while maintaining watertightness;
A column with one end attached to the center of the front of the board,
It is connected to the rotation shafts extending in directions away from each other on the straight line perpendicular to the extension direction of the support column from the tip of the support column, and rotates around a common rotation center line orthogonal to the extension direction of the support column. A drilling machine having two rotary excavating bodies configured in
Rotating excavation by arranging a plurality of pipes with excavating machines on the inner side of the front opening side in a direction intersecting the propulsion direction of the pipe, and keeping the front surface of the board in contact with the rear surface of the pipe-side propulsion receiving portion while maintaining watertightness A tube installation method in the ground , wherein the plurality of tubes are pushed together by excavating a natural ground in front of the tubes by pressing the substrate while rotating the body .   2. The plurality of tubes are propelled together in a state where a plurality of tubes are arranged in a direction crossing the propelling direction of the tubes and a gap between the adjacent tubes is closed. The pipe installation method in the ground described in 1. Provided with a propulsive force transmission rod-like body having one end connected to the rear surface of the substrate and the other end projecting backward from the rear end surface of the tube, and each propulsive force transmitting rod shape projecting rearward from the rear end surface of each of the plurality of tubes arranged A plurality of pipes are propelled together by installing a brazing material having a length straddling between the other ends of the body and pressing the plaster material with a hydraulic jack. Item 3. Pipe installation method in the ground according to item 2.   A fixed excavation body that is arranged in a direction intersecting with the propulsion direction of the pipe and is adjacent to each other at the boundary portion between the pipes and protruding forward from the top opening of the pipe is provided. The pipe installation method to the underground according to any one of claims 1 to 3.   The ground according to any one of claims 1 to 4, wherein a communication hole serving as a passage connecting the pipes adjacent to each other and the face plates of the pipes and connecting the two pipes is provided. How to install the tube inside.

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