JP5688274B2 - Pipe installation device - Google Patents

Description

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

2. Description of the Related Art Conventionally, an apparatus for installing a pipe having a square cross section in the ground is known.
For example, a curved pipe with a quadrilateral cross section that extends by bending to draw an arc (a pipe whose central axis is a curve), or a pipe with a square cross section that extends straight (a pipe whose central axis is a straight line) ) In the ground, install an injection device that injects high-pressure water inside the top opening side of the pipe that goes into the ground first, or rotate the bit around the center axis of the pipe Install an excavating machine with a rotating excavator that excavates underground, install an injection device for excavating soil near the corner inside the pipe that is not excavated by the rotary excavator, and press the pipe In addition, there is known a device for propelling a pipe and installing it in the ground by excavating the ground with high-pressure water or excavating the ground with a drilling machine and high-pressure water (for example, see Patent Document 1). .

JP 2005-83007 A

However, according to the pipe installation device, the pipe tip may collide with the hard ground and the pipe may not be smoothly pushed.
This invention is made | formed in view of the said problem, and provides the pipe | tube installation apparatus which can push a pipe | tube smoothly in the ground.

The pipe installation device according to the present invention installs a drilling machine having a rotary excavator on the top opening side of a pipe to be put into the ground first when the pipe is installed in the ground from a hollow portion formed in the ground. In the pipe installation device that pushes the pipe and excavates the ground with the excavating machine, the pipe is installed in the ground by propelling the pipe, and supports the excavating machine and follows the central axis of the pipe inside the pipe Propulsive force receiving portion that is provided so as to be movable in the direction and transmits the force that propels the excavating machine to the excavating machine, excavating machine propulsive force supplying means that applies propulsive force to the propulsive force receiving portion, and supplies the propulsive force to the pipe The tube propulsive force supply means, which is provided between the outer peripheral surface of the thrust receiving portion and the inner peripheral surface of the tube, maintains the watertightness between the outer peripheral surface of the thrust receiving portion and the inner peripheral surface of the tube. a watertight performance maintaining member, since the excavating machine and the tube was promoted configured to be able to individually times If the excavating body is positioned in front of the top opening of the pipe and the pipe is propelled and the excavation operation by the rotating excavating body is performed, the ground located in front of the top opening of the pipe is reliably excavated by the rotating excavator. As a result, it is possible to reduce the situation where the tip of the pipe collides with the hard ground and the pipe cannot be pushed, and the pipe can be pushed smoothly in the ground. In addition, if the propulsion operation of the pipe and the excavation operation by the rotary excavator are performed with the rotary excavator positioned in the pipe, only the underground part that has entered the inside of the pipe is excavated by the rotary excavator. As a result, there will be less excess digging and less impact on the ground, such as land subsidence. As described above, since the position of the rotary excavator can be changed in the front-rear direction along the central axis of the pipe with respect to the pipe depending on the ground condition and the situation of the propulsion operation of the pipe, as described above, As a result, the pipe can be smoothly promoted and the influence on the ground such as land subsidence can be reduced. In addition, the excavating machine and the pipe can be individually propelled so that the groundwater does not flow into the cavity through the pipe, and the burden of the wastewater treatment work in the cavity can be reduced.
The propulsive force receiving portion includes a cylindrical portion having an outer peripheral surface facing the inner peripheral surface of the tube and extending in a direction along the central axis of the tube, and the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the tube Since one or more watertight performance maintaining members are provided at predetermined intervals along the central axis of the pipe, the propelling force receiving portion is propelled by the cylindrical portion of the propelling force receiving portion when the propelling force receiving portion propels. Since the direction and the central axis of the pipe can be maintained in parallel, and the propulsive force receiving portion can be propelled in parallel along the central axis of the tube, the propulsive force receiving portion can be easily propelled and It is possible to propel the excavating machine and the pipe separately so that the groundwater does not flow into the cavity via the pipe, and the burden of the wastewater treatment work in the cavity can be reduced.
In the state where the rotary excavation body of the excavating machine is positioned in front of the opening at the tip of the pipe, the forward movement of the propulsive force receiving portion is restricted, and passes through the center of the propulsive force receiving portion along the central axis of the pipe Since the excavating machine shake prevention part that catches the propulsion force receiving part is provided so as to protrude from the inner surface of the pipe so that the central axis of the propulsive force receiving part that is extended does not tilt with respect to the central axis of the pipe, The central axis of the propulsive force receiving part is adjusted to the central axis of the pipe by performing excavation operation by the rotary excavator while applying the propulsive force to the propulsive force receiving part so that the front surface of the receiving part and the excavating machine shake preventing part are in contact with each other. As a result, the excavation posture of the excavating machine can be maintained so as not to incline with respect to the pipe, and the pipe can be accurately installed at a predetermined installation position.
Since the rotary excavator is equipped with a rotary excavator that rotates about the rotation center line that intersects the propulsion direction of the pipe, the direction in which the excavation bit provided on the rotary excavator intersects the rotation center line of the rotary excavator Therefore, since the excavation bit is repeatedly digging into the ground by the rotation of the rotary excavating body and the underground is excavated into a semicircular cross section, the excavation efficiency is improved and the excavation work can be performed efficiently.
Since the tube is a tube having a quadrangular cross section, by using a rotating body that rotates around the rotation center line that intersects the propulsion direction of the tube, the underground portion near the corner inside the tube having the quadrangular cross section is used. Can be excavated with a rotary excavator, and the pipe can be smoothly promoted in the ground.

Sectional drawing of a pipe | tube installation apparatus (Embodiment 1). (A) is the perspective view which showed the head part of the head pipe, (b) is the figure which looked at the excavation machine inside a pipe | tube from the blade-tip side of a guide blade pipe (embodiment 1). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). (A) The figure which shows the state which excavates by positioning an excavating machine inside a head pipe, (b) The figure which shows the state which excavates by positioning an excavating machine ahead of the head opening of a top pipe (implementation) Form 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 | tube installation apparatus (Embodiment 1). The perspective view which decomposed | disassembled and showed the front part of the top pipe (Embodiment 1). The perspective view which showed the head part of the top pipe (Embodiment 1). Sectional drawing of a pipe installation apparatus (embodiment 2). Sectional drawing of a pipe installation apparatus (embodiment 3). (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 4).

Embodiment 1
First, based on FIG. 1 thru | or FIG. 19, the basic composition and operation | movement of the pipe installation apparatus 1 for implement | achieving the underground pipe installation method 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 to bend and extend so as to draw an arc as shown in FIG. 5; FIG. 7, 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. 5 and FIG. 7, a support work 11 that is bent and extended so as to draw an arc is constructed in the underground 10 by sequentially connecting a plurality of bent pipes and installing them in the underground 10. As shown in FIG. 6, a support work 11 is constructed in the underground 10 that is straightly extended by connecting a plurality of straight pipes sequentially and being installed in the underground 10.
As shown in FIG. 5, the support 11 constructed in the ground by the pipe installation device 1 and the pipe installation method of the first embodiment includes a pipe 2 (hereinafter referred to as the 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. 7A, 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. 7 (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. 6, a plurality of support pipes 11 constructed by continuously connecting a plurality of curved 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.

Hereinafter, the configuration of the pipe installation device 1 will be described with reference to FIGS. 1 and 2.
The leading tube 6 has a configuration including a guide blade portion on the distal end side of the tube, and is formed of, for example, a tube 6x and a guide blade tube 9 functioning as a guide blade portion provided at the distal end of the tube 6x. 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 leading tube 6 is formed by connecting the other opening end of the guide blade tube 9 and the opening end 8 at the tip of the tube 6x. In this case, for example, the outer diameter of the guide blade tube 9 is larger than the outer diameter of the tube 6x, and the inner periphery of the tube at the opening end surface 15 is located on the other opening end surface 15 side of the guide blade tube 9. The surface side is shaved and a step is provided to form a fitting hole 16 into which the opening end 8 at the tip of the tube 6x is fitted. Then, the opening end 8 at the tip of the tube 6x is fitted into the fitting hole 16 provided in the other opening 17 of the guide blade tube 9, and both of them are connected outside the figure such as bolting and welding. By connecting by means, the other opening end of the guide blade tube 9 and the opening end 8 at the tip of the tube 6x are connected. In this way, the opening end 8 at the tip of the tube 6x is fitted into the fitting hole 16 provided in the other opening 17 of the guide blade tube 9, and the guide blade tube 9 is at the end opening end face 18 of the tube 6x. When the tube 6x is propelled, the tip opening end face 18 of the tube 6x does not receive the resistance of the underground 10 and the propulsion resistance can be reduced. In addition, since the fitting hole 16 for fitting the opening end 8 at the tip of the tube 6x is formed, the guide blade tube 9 can be easily installed at the tip of the tube 6x, and the leading tube 6 is formed. The assembly of the tube 6x and the guide blade tube 9 can be facilitated. In this case, a step is generated between the tube 6x and the guide blade tube 9 on the rectangular outer peripheral surface of the leading tube 6. This step is formed between the rectangular outer peripheral surface of the tube 2 and the rectangular inner peripheral surface of the reinforcing body 116 described later. The watertight performance maintaining member 117b provided therebetween is formed small (for example, about 1 cm) so that the waterstop performance can be maintained.

The outer diameter of the guide blade tube 9 and the tube 6x is the same diameter, and the boundary portion of the guide blade tube 9 is welded all around with the other opening end surface of the guide blade tube 9 and the tip opening end surface 18 of the tube 6x abutting each other. Alternatively, the leading pipe 6 may be formed by spot welding.
Alternatively, 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.
In this way, the step on the rectangular outer peripheral surface of the leading pipe 6 can be reduced or no step occurs, so that the watertight performance provided between the rectangular outer peripheral surface of the pipe 2 and the rectangular inner peripheral surface of the reinforcing body 116 is maintained. The water stop performance by the member 117b can be maintained satisfactorily.

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 formed to be smaller than the rectangular dimension that goes around the inner surface of the cross section of the leading tube 6.
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 substrate 25 includes a water supply hole 75b that passes through the front surface 39f and the rear surface 39, a drainage hole 76b, a pressure-resistant hose lead-out hole 38a, and a later-described hydraulic supply path and a drain hole for the hydraulic discharge path. .

A watertight performance maintaining member (packing) 35 formed of, for example, an elastic body for maintaining watertightness between the rectangular outer peripheral surface 33 of the rectangular plate 30 forming the substrate 25 and the inner peripheral surface 20a of the leading pipe 6 is provided. Provided. That is, the annular inner surface of the watertight performance maintaining member 35 formed by the annular rectangular frame 36 centered on the center of the substrate 25 and the rectangular outer peripheral surface 33 of the substrate 25 are brought into contact with each other, and both are adhered with, for example, an adhesive. As a result, the watertight performance maintaining member 35 is attached to the rectangular outer peripheral surface 33 of the substrate 25, and the outer peripheral surface of the annular watertight performance maintaining member 35 and the inner peripheral surface 20a of the pipe of the leading pipe 6 are in contact with each other. Since the substrate 25 is configured to be movable along the central axis of the leading tube 6, the rectangular outer peripheral surface 33 of the substrate 25 and the tube of the leading tube 6 are separated 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 through the space between the inner peripheral surface 20a.
The annular watertight performance maintaining member 35 may be attached to the inner peripheral surface 20a of the leading pipe 6.

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 column 42 is fixed to the substrate 25 so that the T-shaped hollow path of the support portion 40 communicates with the pressure-resistant hose lead-out 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 pressure hose lead-out 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.

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 and the tip 80 of the excavation bit 52 of the rotary excavation body 46 are arranged on the same plane perpendicular to the central axis of the top pipe 6. Is done.
As described above, the configuration in which the center between the upper and lower sides of the fixed excavation body 77 and the tip 80 of the excavation bit 52 of the rotary excavation body 46 are located on the same plane orthogonal to the central axis of the top pipe 6 is described above. As described above, the fixed excavation body 77 has an effect of facilitating excavation by inducing cracks in the ground prior to excavation, and the fixed excavation body 77 collides with the ground and the leading pipe 6 does not propel. Can also be prevented.

Note that the center between the upper and lower sides of the fixed excavation body 77 may be positioned behind or in front of the tip 80 of the excavation bit 52 of the rotary excavation body 46.
When the center between the upper and lower sides of the fixed excavation body 77 is configured to be positioned in front of the tip 80 of the excavation bit 52 of the rotary excavation body 46, the fixed excavation body 77 induces cracks in the ground prior to excavation. The effect that it becomes easy to excavate by is obtained.
Conversely, when the center between the upper and lower sides of the fixed excavation body 77 is configured to be located behind the tip 80 of the excavation bit 52 of the rotary excavation body 46, the excavation bit 52 precedes when the ground is hard. Thus, it is possible to prevent the fixed excavation body 77 from colliding with the ground and the leading pipe 6 from being propelled.

  Further, the tip shape of the fixed excavation body 77 is such that the top pipe 6 collides with the ground by propelling the ground pipe, and the left and right rotary excavation bodies 46: 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 tip of the front tip may be formed in a sharp blade shape, or the tip of 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.

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 top 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. 1 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.

The water supply mechanism 75 includes a water storage tank 75a, a water supply hole 75b penetrating through the front surface 39f and the rear surface 39 of the substrate 25, a water supply pipe 75c formed of, for example, a bellows tube or a steel pipe, and a pump for water supply. 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.

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.

In the first embodiment, the excavating machine 26 and the pipe 2 are configured to be propelled individually. For example, the propulsion device 4 for propelling the excavating machine 26 is constituted by a hydraulic jack 62, and the propulsion device 4 for propelling the pipe 2 is constituted by a hydraulic jack 621. A pressure plate 64 is provided at the tip of each piston rod 63 of the hydraulic jack 62; 621.
In this way, by separately providing the hydraulic jack 62 for propelling the excavating machine 26 and the hydraulic jack 621 for propelling the pipe 2, by separately controlling the hydraulic jack 62 and the hydraulic jack 621, The excavating machine 26 and the pipe 2 can be propelled independently.

The excavating machine propulsive force transmission device 70 includes a substrate 25 as a propulsive force receiving portion, a propulsive force transmitting rod-like body 71, and a propelling force transmitting member 72.
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, the abutting member 72 is installed so as to straddle between the other end 71b; 71b of the left and right propulsive force transmitting rod-like bodies 71A; By connecting with a bolt or a vise device outside and pressing the portion where the central axis of the leading pipe 6 in the abutting member 72 is positioned with the pressing plate 64 of the hydraulic jack 62, the pressing force by the hydraulic jack 62 is changed to the abutting material. 72, the left and right propulsive force transmission rods 71A; 71B and the substrate 25 are transmitted to the excavating machine 26, so that the excavating machine 26 propels forward.

  That is, the left propulsive force transmitting rod 71A, which is one propulsive force transmitting rod, is coupled to the central portion between the upper and lower edges on the left side edge of the rear surface 39 of the substrate 25, and the other propulsive force transmitting rod, right Are connected 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 right and left propulsive force transmitting rods 71A; 71B are pressed by the hydraulic jack 62 to propel the tube 2. Thus, the pressing force can be applied equally to the left and right of the substrate 25, and the substrate 25 is pushed forward while maintaining the front surface 39f of the substrate 25 in a state orthogonal to the central axis of the tube 2. be able to. That is, the column 42 of the excavating machine 26 provided coaxially with 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 pipe 6 is inclined with respect to the central axis of the pipe 2. Therefore, the planned installation position of the pipe 2 in the underground 10 can be accurately excavated by the excavating machine 26, and the pipe 2 can be accurately installed at the planned installation position of the pipe 2 in the underground 10.

In the first embodiment, an excavating machine that applies a propulsive force to the substrate 25 serving as a propulsive force receiving portion by the hydraulic jack 62 as the propulsion device 4, the propelling force transmitting pad 72, and the propulsive 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.

That is, in the first embodiment, the excavating machine propulsion force supply means and the pipe propulsion force supply means are individually provided, so that 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 a position inside the leading opening 6t side of the leading pipe 26 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, in the state of FIG. 3 (a), when the cutting edge 81 at the tip of the leading pipe 6 collides with the hard ground and the leading pipe 6 stops propelling, the rotary excavator 46 is operated while operating the hydraulic jack 62; Since the excavating operation is performed at 46, the rotary excavating body 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 top pipe 6 as shown in FIG. The pipe 2 can be smoothly promoted 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 the first embodiment, for example, as shown in FIG. 8, the tunnel cavity 100, which is the 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. 8, 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).
Alternatively, although not shown, the departure port 112 is determined so that the length in the direction along the central axis 113 of the segment tunnel 110 corresponds to the length of the horizontal width of one tube 2, and a plurality of departure ports Holes 115 forming 112 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.

Further, as shown in FIGS. 12 and 13, 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 are installed in the underground 10 starting from the respective departure ports 112, as shown in FIG. 9, 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.

  When the length of the entrance port 118 and the start port 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 one tube 2, one piece is provided. Since the leading pipe 6 is propelled to the ground 10 via the starting port 112 and the succeeding pipe 7 is followed, the pipe setting device 1 described above may be used.

Next, with reference to FIG. 4, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated. In FIG. 4, the segment tunnel 110, the departure port 112, and the reinforcing body 116 are not shown.
The substrate 25 to which the excavating machine 26, the propulsion force transmission rod 71, the water supply pipe 75 c, the drainage pipe 76 b, and the watertight performance maintaining member 35 are attached is installed inside the top pipe 6. That is, the front surface 39 f of the rectangular plate 30 forming the substrate 25 is installed so as to form a surface orthogonal to the central axis of the top tube 6. 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.
Then, the front end side of the top pipe 6 is inserted into the reinforcing body 116 from the hollow portion 100 via the entrance port 118 (see FIG. 13), and the abutting material 72 protrudes rearward from the rear end face 102e of the top pipe 6 to the left and right propulsion. It installs so that it may straddle between the other end 71b; 71b of force transmission rod-shaped body 71A; 71B. Further, the other end of the pressure hose 56 of the excavating machine 26 is connected to the hydraulic pressure source 55.
Then, a pressing plate 64 provided at the tip of the piston rod 63 which is retracted by installing the hydraulic jack 62 so as to apply a pressing force to the abutting material 72 is placed on the portion where the central axis of the leading pipe 6 in the abutting material 72 is located. By locating, excavating machine propulsion force supply means is formed, and only the excavating machine 26 can be propelled by the pressing force of the hydraulic jack 62.
Further, for example, the hydraulic jacks 621; 621 are installed so as to apply a pressing force to the left and right rear end surfaces 102e; 102e of the leading pipe 6 to form a pipe propulsion force supply means, and the pressing force of the hydraulic jacks 621; Thus, only the top pipe 6 can be propelled.
Then, by operating the hydraulic jacks 62; 621; 621, as shown in FIG. 4A, the tip 81 of the guide blade tube 9 at the tip of the leading pipe 6 and the tip of the excavating bit 52 of the rotary excavating body 46; 80 is pressed against the ground surface 101. Thereafter, the pump 75d for water supply is driven to supply muddy water into the space 69, and the muddy water is circulated between the space 69 and the collecting tank 75X, and the hydraulic pressure from the hydraulic source 55 is controlled by the control device 65. Excavation is performed by supplying pressure oil to the motor 47 and rotating the rotary excavator 46 while extending the piston rod 63 of the hydraulic jacks 621 and 621 and pressing the portion of the abutting member 72 where the central axis of the leading pipe 6 is located. The excavating machine 26 and the leading pipe are driven by propelling the leading pipe 6 by propelling the machine 26 and extending the piston rod 63 of the hydraulic jack 621; 621 and pressing the left and right rear end faces 102e; 102e of the leading pipe 6. 6 is 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 trailing end face 102e of the leading pipe 6, as shown in FIG. 4B, the trailing pipe 7 is welded to the trailing end face 102e of the leading pipe 6 or a bolt. Further, as shown in FIG. 4C, the other end 71b of the leading propulsive force transmission rod 71 and one end 71a of the following propulsion transmission rod 71 are bolts, or By joining by welding, the subsequent propulsive force transmission rod-shaped body 71 is added behind the leading propulsive force transmission rod-shaped body 71, and an extended pressure-resistant hose (not shown) is added to the other end of the pressure-resistant hose 56. An extension water supply pipe (not shown) is added to the other end of the supply pipe 75c, and an extension drainage pipe (not shown) is added to the other end of the mud discharge pipe 76b.
And as shown in FIG.4 (d), the contact material 72 is straddle | crossed between the other end 71b; 71b of the right-and-left propulsive force transmission rod-shaped body 71A; 71B which protrudes back from the rear-end edge of the succeeding pipe | tube 7. The hydraulic jack 62 is installed so that a pressing force can be applied to the abutting member 72, and the hydraulic jacks 621; 621 are provided so that a pressing force can be applied to the left and right rear end faces 102e; Install.
Then, similarly to the above, the water supply pump 75d is driven to supply muddy water into the space 69, and the muddy water is circulated between the space 69 and the collecting tank 75X. While supplying pressure oil from the hydraulic source 55 to the hydraulic motor 47 and rotating the rotary excavator 46, the piston rod 63 of the hydraulic jack 62 is extended to press the portion where the central axis of the succeeding pipe 7 is located in the abutting member 72. As a result, the excavating machine 26 is pushed and the piston rod 63 of the hydraulic jack 621; 621 is extended to push the left and right rear end faces 102e; And the succeeding pipe 7 are propelled forward, and the succeeding pipe 7 is installed in the ground 10.
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 support work 11 can be constructed by sequentially connecting the subsequent succeeding pipe 7 to the rear end edge of the preceding succeeding pipe 7 and installing it in the ground 10.

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 reaching-side cavity 100, the excavating machine 26, the substrate 25, and the propelling force transmission rod-like body 71 are pushed into the reaching-side cavity 100 and collected. 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. 10; FIG. 7 (a); FIG. 11; FIG. 6, when the support 11 is constructed between the left and right cavities 100, the excavating machine 26 is recovered in the reaching 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 FIGS. 10 and 11, it is preferable that a reinforcing body 116 is also provided in the arrival port 125 formed in the wall 111 of the segment tunnel 110 that forms the cavity 100 on the arrival side.
As shown in FIG. 7B, when the support 11 is constructed so as to start from one cavity 100 formed in the underground 10 and return to the cavity 100, the excavating machine 26 has one cavity. If the excavating machine 26 is recovered by pushing the excavating machine 26 into the cavity 100 from the reaching port when the reaching port of the part 100 is reached, the excavating machine 26 can be easily recovered and the hydraulic jacks 62; 621; 621 Can be installed only in the one cavity 100, so that the apparatus cost can be reduced.

For example, as shown in FIG. 8, the pipe 2 is installed in the ground 10 so as to start from a plurality of starting ports 112; 112. In the underground 10 located between the side surfaces 122; 122 of the pipes 2; 2 that are adjacent to each other with a gap h and located on the left and right hole edges 120; A water stop treatment unit 130 (see FIG. 14A) is formed by performing a water stop treatment such as an injection treatment for injecting an injection 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. 14 (a), the water stop treatment unit 130 formed in the underground 10 and the plurality of pipes 2 installed adjacent to each other with the water stop treatment unit 130 interposed therebetween are stopped. A water structure 131 is formed.
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.

Furthermore, as shown in FIG. 14 (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). An end water stop structure 132 is formed so as to cover the space between the upper and lower ends 131e; 131e of 131; 131 (see FIG. 14A). 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. The left and right stops that return to the cavity 100 starting from the cavity 100 formed in the ground 10 are arranged so as to form a water stop treatment part 136 (FIG. 15A) that sufficiently covers the periphery. It arrange | positions so that the water stop processing part 136 (FIG.15 (b)) which fully covers the edge part opening 13f; 13f and its periphery of water 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. An underground region 137a (see FIG. 16 (a)) in which the lower part of the wall 111; 111 is open is partitioned, and the pipe 2 and the wall 111 installed so as to straddle the lower part of the wall 111; The underground region 137b (see FIG. 16 (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. 16C) 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.

8; FIG. 10; FIG. 11, the length in the direction along the central axis 113 of the segment tunnel 110 of the departure port 112 corresponds to the length of the left and right lateral width in which a plurality of tubes 2 are arranged. In such a case, for example, a pipe installation device 1A that uses a plurality of head pipes 6 arranged and propelled together as shown in FIG. 17 is used.
That is, a plurality of head pipes 6 in which a plurality of rotary excavating bodies 46 are installed inside the head opening 6t (opening edge 13) side are arranged in a direction crossing the propulsion direction of the head pipe 6, and one surface of each of the head pipes 6 (Outer surfaces) are brought into contact with each other and connected by connecting means, and the plurality of leading pipes 6; 6 are propelled together (simultaneously) in a state where the gaps between the leading pipes 6; 6 are closed. FIG. 17 shows an example in which two front pipes 6 having two rotary excavating bodies 46; 46 installed on the inner side of the front opening 6t are arranged side by side and 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. 18) of the face plates of the respective lead pipes 6 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 (any one of the top and bottom face plates of the top pipe shown in FIG. 18). Then, the front pipes 6: 6 adjacent to each other are brought into contact with each other so that the communication holes 90; 90 of the front pipes 6: 6 adjacent to each other communicate with each other. The plurality of leading pipes 6; 6 connected to each other by the connecting means and adjacent to each other are simultaneously driven.
For example, two leading pipes 6 shown in FIG. 1 are prepared, and as shown in FIG. 18, communication holes 90 are formed on the left side surface of the right leading pipe 6 and the right side surface of the left leading pipe 6, respectively. As shown in FIG. 19, the left side surface of the right top tube 6 and the right side surface of the left top tube 6 are butted so that the communication holes 90 of the left and right top tubes 6: 6 communicate with each other. The upper edge of the left side and the upper edge of the right side are connected by welding, and the lower end edge of the left side face and the lower end edge of the right side face are connected by welding, so that they are connected side by side. The left and right head pipes 6; 6 are formed, and the connected left and right head pipes 6; 6 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;
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.

The leading pipe 6 of the pipe installation device 1A has a rectangular inner and outer diameter dimension on the rear end opening edge side of the guide blade pipe 9 and a rectangular inner and outer diameter dimension on the tip opening edge side of the pipe 6x, and the same dimension. The boundary portion between the rear end opening end surface 17a of the guide blade tube 9 and the front end opening end surface 18 of the tube 6x is entirely in a state where the rear end opening end surface 17a of the guide blade tube 9 and the front end opening end surface 18 of the tube 6x face each other. By connecting by circumferential welding or spot welding, a configuration in which a guide blade tube 9 is provided at the tip of the tube 6x is used.
As the leading pipe 6 of the pipe installation device 1A, a pipe formed on a guide blade portion in which the tip side of the pipe functions as the guiding blade pipe 9 may be used as the leading pipe 6.

In the pipe installation device 1A, 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 so that the left and right head pipes 6: 6 communicate with each other. For example, as shown in FIG. 17, the right leading pipe 6 is connected to the right and left leading pipes 6; 6 by using a water supply pipe 75 c of the right leading pipe 6. By supplying mud water into the space 69 of the pipe 6 and draining it using the mud pipe 76b of the left head pipe 6, the mud water passes from the space 69 of the right head pipe 6 through the communication holes 90; Then, it flows into the space 69 of the left leading pipe 6 and the mud in the space 69 of the left and right leading pipes 6; 6 is discharged to the mud tank 76d by driving the mud pump 76c.
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.

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, the portion of the abutting member 72 where the central axis of the leading pipe 6 is positioned is pressed by the pressing plate 64 of the hydraulic jack 62 and the rear end surface 102 e of the leading pipe 6 is pressed by the pressing plate 64 of the hydraulic jack 621. The pressing force by the jack 62 is transmitted to the contact member 72, all the propulsive force transmission rods 71, the substrate 25 and the rotary excavation body 46; 46, and the pressing force by the hydraulic jack 621; 621 is transmitted to the top pipe 6. Therefore, the left and right head pipes 6 and the rotary excavation body 46; 46 are propelled forward together.
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;
Thereafter, as described with reference to FIG. 4, the succeeding tube 7 is connected to the rear end surface 102 e of the leading tube 6, and the succeeding tubes 7 adjacent to each other by abutting one surface (outer surface) of the succeeding tubes 7; 7 are connected by connecting means such as welding, and the propulsive force transmitting rod 71 is added, and the leading pipe 6; the succeeding pipe 7 is propelled. Thereafter, similarly, the succeeding tube 7 is sequentially connected to the rear end of the preceding succeeding tube 7, and the leading tube 6; the succeeding tube 7 is propelled.

  In the case of the pipe installation device 1A, in each head pipe 6, the left propulsive force transmitting rod-shaped body 71A, which is one propulsive force transmitting rod-shaped body, 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 hydraulic jack 62; 62 is evenly transmitted to each propulsive force transmitting rod-like body 71 via the contact member 72, and the pressing force can be applied equally to the left and right of each substrate 25; Multiple digging Machine 26; 26 can be propelled smoothly simultaneously (together) a.

In addition, when using the pipe installation device 1A, in a state where a plurality of pipes 2 arranged side by side in the direction intersecting the propulsion direction of the pipe 2 and the gap between the pipes 2 adjacent to each other are closed using a connecting means, Since a plurality of pipes 2 are propelled together, a water stop portion 91 having a high water stop effect by a 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 pipe 2 and the pipe 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, Can reduce the construction cost, reduce the construction cost, etc., and can construct 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.

  As in 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 driven. 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.

  Moreover, when the length of the width of the starting port 112 is formed to a length corresponding to the length of a plurality of rows (a plurality of) tubes 2 arranged, when the above-described tube installation device 1A is used, It is possible to easily perform the installation work of the plurality of rows of pipes 2 and to reliably and easily stop the water between the plurality of adjacent pipes 2; 2 by welding. When installing in the underground 10 one by one, the outer surfaces of a plurality of adjacent pipes 2; 2 can be easily brought into contact with each other, so that a water stop treatment between the adjacent pipes 2 and 2 can be easily 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 pipe installation device 1 according to the first embodiment, the force that supports the excavating machine 26 and is movable inside the front pipe 6 in the direction along the central axis of the front pipe 6 to propel the excavating machine 26 is provided. A substrate 25 serving as a propulsive force receiving portion that transmits to the excavating machine 26, an excavating machine propulsive force supplying unit that applies propulsive force to the substrate 25, and a tube propulsive force supplying unit that supplies propulsive force to the pipe 2. Since the excavating machine 26 and the pipe 2 can be individually propelled by the above, the propulsion operation and rotation of the pipe 2 with the rotary excavating body 46; 46 positioned in front of the top opening 6t of the top pipe 6 If excavation by the excavating body 46; 46 is performed, the ground located in front of the top opening 6t of the top pipe 2 can be surely excavated by the rotary excavating body 46; 46, so that the tip of the top pipe 6 becomes a hard ground. I ca n’t propel the tube 2 Comprising such a situation the possible reduced, it is possible to propel the tube 2 smoothly in the ground. Further, when the propulsion operation of the pipe 2 and the excavation operation by the rotary excavator 46; 46 are performed with the rotary excavator 46 positioned in the head pipe 6, only the underground portion that enters the inside of the head pipe 6 rotates. Since it is excavated by the excavation body 46; 46, the excessive excavation portion of the underground 10 is reduced, and the influence on the underground such as ground subsidence can be reduced.
That is, the position of the rotary excavator 46; 46 can be changed in the front-rear direction along the central axis of the front pipe 6 with respect to the front pipe 6 depending on the ground condition and the situation of the propulsion operation of the pipe 2. 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.
Further, an annular shape is provided between the rectangular outer peripheral surface 33 of the substrate 25 and the inner peripheral surface 20a of the leading tube 6 to maintain watertightness between the rectangular outer peripheral surface 33 of the substrate 25 and the inner peripheral surface 20a of the leading tube 6. Since the watertight performance maintaining member 35 is provided, the excavating machine 26 and the pipe 2 can be individually propelled so that the groundwater does not flow into the cavity 100 via the pipe 2. Can reduce the burden of wastewater treatment work.

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 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 excavating machine 26 is propelled by pressing at 62, and the left and right propulsive force transmitting rods 71A; 71B are sequentially added to the left and right propulsive force transmitting rods 71A; The right and left propulsive force transmission rods 71A; 71B are sequentially pressed by the hydraulic jack 62 to propel the excavating machine 26, so that the pressing force can be applied equally to the left and right of the substrate 25. It becomes so that, the excavating machine 26 can be straight and accurately promote the propulsion direction of the schedule. In addition, since the left and right rear end faces 102e; 102e of the pipe 2 are configured to be pressed by the hydraulic jacks 621; 621, respectively, it becomes possible to apply a pressing force evenly to the left and right of the pipe 2, and the pipe 2 is scheduled. Can be propelled straight in the propulsion direction.
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 face 102e of the tube 2, the following propulsive force transmitting rod-like body is added behind the propelling force transmitting rod-like member 71 (FIG. 4B). (See (c)), conversely, after the propulsive force transmitting rod-like body 71 is added behind the following propulsive force transmitting rod-like body, the succeeding tube 7 may be connected to the rear end face 102e of the tube 2.
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.

  When the length of the starting port 112 in the direction along the central axis 113 of the segment tunnel 110 is determined to correspond to the length corresponding to the width in which the tubes 2 are arranged in a plurality of rows on the left and right, as described above. The pipes 2 may be sent to the underground 10 simultaneously in a plurality of rows using the pipe installation device 1A, or the tubes 2 may be sent to the underground 10 one row at a time using the tube installation device 1. You may install in the underground 10. When the pipes 2 are sent to the underground 10 one row at a time and installed in the underground 10, a plurality of pipes 2 are installed in the ground so that the outer surfaces of the plurality of pipes 2 are in contact with each other. It becomes possible to form a water-stop structure with the pipe 2, and the water-stop treatment between the plurality of pipes 2;

Embodiment 2
As shown in FIG. 20, 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 cylindrical outer peripheral surface 25a of the cylindrical portion 25A or the inner peripheral surface 20a of the top tube 6.
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 3
As shown in FIG. 21, the pipe installation device 1 of Embodiment 3 includes an excavation machine shake prevention unit 21 provided so as to protrude from the inner surface 20 of the pipe of the leading pipe 6. The excavation machine shake prevention unit 21 regulates the forward movement of the substrate 25 in a state where the rotary excavation body 46; 46 of the excavation machine 26 is positioned in front of the tip opening 6t of the top pipe 6, and By receiving the substrate 25 in contact with the front surface 39f of the substrate 25 so that the central axis of the substrate 25 passing through the center and extending along the central axis of the leading tube 6 does not tilt with respect to the central axis of the leading tube 6. This prevents the excavating machine 26 from shaking.
For example, the excavating machine shake prevention unit 21 includes a rectangular frame plane that is in surface contact with the outer peripheral side plane of the front surface 39f of the substrate 25 that has received a pressing force from the hydraulic jack 62, and the outer peripheral side plane and the rectangular frame plane are in a plane. In the case of contact, the front surface 39f of the substrate 25 is maintained in a plane orthogonal to the central axis of the leading tube 6, and the central axis of the column 42 provided so as to be orthogonal to the front surface 39f from the center of the front surface 39f of the substrate 25 A rectangular frame having a function of maintaining the center axis of the leading pipe 6 so as to coincide with the inner peripheral surface 20a of the pipe of the leading pipe 6 by welding, bolts, nuts or the like connecting means outside the figure. Consists of the body.
That is, when the substrate 25 is pressed against the rectangular frame plane of the excavating machine shake prevention unit 21, 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 excavating machine 26 is prevented from shaking. The
According to the pipe installation device 1 of the third embodiment, since the excavating machine shake preventing part 21 provided so as to protrude from the inner surface 20 of the pipe of the leading pipe 6 is provided, the front surface 39f of the substrate 25 and the excavating machine shake preventing part are provided. The front surface 39f of the substrate 25 is orthogonal to the central axis of the leading pipe 6 by performing excavation operation by the rotary excavator 46; 46 while applying a propulsive force to the substrate 25 by the hydraulic jack 62 so that the surface 21 is in surface contact. Of the excavating machine 26 so that the center axis of the base plate 25 is not inclined with respect to the center axis of the head pipe 6. Since the rotary excavation body 46:46 of the excavating machine 26 excavates the underground 10 with the excavation posture maintained, the planned position of the underground 10 can be excavated correctly and the pipe 2 can be accurately installed at the planned installation position. It becomes like this.
In addition, a watertight performance maintaining member may be interposed between the excavating machine shake preventing unit 21 and the substrate 25. In this case, the substrate 25 has a rectangular frame of the excavating machine shake preventing unit 21 via the watertight performance maintaining member. By being pressed against the flat surface, 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.
The excavating machine shake prevention unit 21 receives the substrate 25 pressed by the hydraulic jack 62 and maintains the front surface 39f of the substrate 25 on a surface orthogonal to the central axis of the front tube 6 so that the inner surface of the front tube 6 can be maintained. What is necessary is just to set it as the structure provided in the surrounding surface 20a in at least 2 or more places. For example, the excavating machine shake prevention unit 21 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. What is necessary is just to set it as the structure which has the surface, the line | wire, or the point.
21 illustrates an example in which the configuration of the third embodiment is applied to the configuration of the first embodiment of FIG. 1, the configuration of the third embodiment can also be applied to the configuration of the second embodiment.

Embodiment 4
In the present invention, as shown in FIG. 22 (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. 22 (b) 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 5
When the tubes 2 are installed in the underground 10 one row at a time, a starting port 112 corresponding to each tube row is formed in the wall 111, and the adjacent tube rows are installed at intervals, and adjacent to each other. The water stop processing part may be formed in the ground between the pipes 2; In this case, the pipe 2 when propelling the pipe 2 to the ground 10; the interference between the two is eliminated, and the pipe 2 can be smoothly pushed to the ground 10 and workability is further improved.

Embodiment 6
When the tubes 2 are installed in the underground 10 one row at a time, the plurality of tubes 2 are installed in the underground 10 in a plurality of rows from the cavity portion 100 through the starting port 112 provided in the wall 111. Forming a water stop structure with a plurality of pipes 2 in which the outer surfaces of the multiple rows of pipes 2 are in contact with each other, and excavating the underground portion partitioned by this water stop structure so that groundwater does not enter An underground space may be formed.
In this case, a starting port 112 corresponding to each row of tubes is formed in the wall 111, and the tubes are sent to the ground 10 one row at a time using the tube setting device 1, so that the outer surfaces of the plurality of rows of tubes 2 are connected to each other. You may install so that it may mutually contact, and the starting port 112 corresponding to the width | variety for several rows of the pipe | tube 2 is formed sequentially in the wall 111, and the pipe | tube 2 is simultaneously made into several rows using the pipe | tube installation apparatus 1A. You may send out to the underground 10 and install in the underground 10.

The excavating machine 26 including one or three or more rotary excavators 46 may be used.
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.

  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, an excavating machine including a rotary excavating body with the central axis of the pipe 2 as the rotation center may be used.

  The tube 2 may have a cross-sectional shape other than a square shape, or a cross-sectional shape other than a square shape such as a circle or an ellipse. 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.

  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.

2 pipes, 6 top pipe (pipe), 6t top opening, 7 following pipe (pipe), 10 underground,
20a Inner peripheral surface of the top pipe, 21 excavation machine shake prevention part, 25 substrate (propulsion receiving part),
25A cylinder part, 25a cylinder outer peripheral surface, 25b watertight performance maintaining member, 26 excavating machine,
33 rectangular outer peripheral surface (outer peripheral surface of the thrust receiving portion), 35 watertight performance maintaining member,
39f Front surface of substrate, 46 rotating excavated body, 100 cavity, L rotation center line.

Claims (5)

When a pipe is installed in the ground from a cavity formed in the ground, a drilling machine having a rotary excavator is installed on the head opening side of the pipe that is first put into the ground, and the pipe is pressed and the drilling machine In the pipe installation device that pushes the pipe and installs it in the ground by excavating the underground with
A propulsion force receiving portion that supports the excavating machine and is movable inside the tube in a direction along the central axis of the tube and transmits the force for propelling the excavating machine to the excavating machine, and a propulsive force to the propulsive force receiving portion Excavating machine propulsive force supplying means for providing the pipe, pipe propulsive force supplying means for supplying propulsive force to the pipe, and the propulsive force receiving part provided between the outer peripheral surface of the propulsive force receiving part and the inner peripheral surface of the pipe. A watertight performance maintaining member for maintaining watertightness between the outer peripheral surface and the inner peripheral surface of the pipe,
A pipe installation device characterized in that the excavating machine and the pipe can be separately propelled . The propulsive force receiving portion includes a cylindrical portion having an outer peripheral surface facing the inner peripheral surface of the tube and extending in a direction along the central axis of the tube, and the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the tube pipe installation system according to claim 1, characterized in that a plurality spaced a predetermined distance along the watertight performance maintaining member to the central axis of one or tube between. In the state where the rotary excavation body of the excavating machine is positioned in front of the opening at the tip of the pipe, the forward movement of the propulsive force receiving portion is restricted, and passes through the center of the propulsive force receiving portion along the central axis of the pipe The excavating machine shake prevention part for receiving the propulsion force receiving part is provided so as to protrude from the inner surface of the pipe so that the central axis of the propulsive force receiving part that is extended is not inclined with respect to the central axis of the pipe. The pipe installation device according to claim 1 or 2 . The pipe installation device according to any one of claims 1 to 3 , wherein the rotary excavation body includes a rotary excavation body that rotates about a rotation center line that intersects a propulsion direction of the pipe. . The pipe installation device according to any one of claims 1 to 4 , wherein the pipe is a pipe having a quadrangular cross section.

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