JP2016172995A - Pipe installation method, pipe installation device, and adjustment device for pipe propelling direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a propelling direction of a pipe to be corrected when the pipe propelling direction deviates from the planned propelling direction, while installing the pipe underground.SOLUTION: In a pipe installation method that installs a pipe underground by propelling the pipe using a pipe installation device 1 provided with a support body that rotatably supports a rotary excavation body 46, a pipe (a leading pipe 6) that has a through-hole 6H formed on at least one of surface plates is used, and natural ground pressing means (an upper left side jack 80A1 and others) is provided that is connected to the support body and moves the pipe in a direction away from a natural ground 99 by reactive force from pressing of the natural ground through the through-hole. When a propelling direction of the pipe deviates from a planned propelling direction F1, the pipe is moved in the direction away from the natural ground by the reactive force from pressing of the natural ground 99 through the through-hole 6H. The propelling direction of the pipe is changed by propelling the pipe after inserting interval maintaining means (a camber 90) between an outer surface of the pipe deviated away from the natural ground and the natural ground through the through-hole 6H, for maintaining the interval between the ground and the outer surface of the pipe.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a pipe installation method, a pipe installation apparatus, and the like for installing a pipe having a square section in the ground.

  Conventionally, in order to install a pipe with a square cross section in the ground, it is positioned on the front side of the pipe (the front side in the propulsion direction relative to the opening in the propulsion direction of the pipe when propelling the pipe in the direction along the center line of the pipe). The rotating excavated body is supported on the inside of the pipe through the support so that it can swing left and right based on the propulsion direction of the pipe into the ground, and the propulsion direction of the pipe into the ground is used as a reference The rotary excavator configured so that the upper and lower excavation width of the rotary excavator is larger than the vertical width of the pipe is configured to rotate around the rotation center line intersecting the propulsion direction of the pipe, and the front side of the pipe There is known a pipe installation device for propelling a pipe while excavating the natural ground in the horizontal and vertical directions (see, for example, Patent Document 1).

JP 2013-1000065 A

However, when the pipe is installed in the ground using the pipe installation device described above, the pipe propulsion direction may deviate from the planned propulsion direction.
The present invention provides a tube installation method, a tube installation device, and the like that can correct the tube propulsion direction when the tube propulsion direction deviates from the planned propulsion direction when the tube is installed in the ground.

According to the pipe installation method according to the present invention, a pipe having a square cross section, a rotary excavator that rotates on the rotation center line that is positioned in front of one end opening of the pipe and intersects the propulsion direction of the pipe, and rotation Using a pipe installation device that supports the excavation body in a rotatable manner and a support body supported by the pipe, the rotary excavation body and the pipe are given a propulsive force while rotating the rotary excavation body to excavate natural ground. In the pipe installation method in which the pipe is propelled and installed in the ground, a through hole is formed in at least one of the upper, lower, left and right faceplates of the pipe when the pipe propulsion direction is used as a reference. In addition to using the pipe, a ground pressing means is provided to move the pipe away from the natural ground by a reaction force when it is connected to the support and presses the natural ground through the through hole. The direction of pipe promotion is planned during When deviating from the propulsion direction, the tube is moved away from the natural ground by the reaction force by pressing the natural ground through the through hole, and between the outer surface of the pipe separated from the natural ground and the natural ground. Since the pipe propulsion direction was changed by propelling the pipe after inserting the gap maintaining means for maintaining the gap between the natural ground and the outer surface of the pipe through the through hole, the pipe propulsion direction is the planned propulsion direction It is possible to correct the propulsion direction of the pipe when it deviates from the above.
Moreover, according to the pipe installation apparatus according to the present invention, the pipe installation apparatus used in the above-described pipe installation method is a pipe having a quadrangular cross section and upper, lower, left, and right face plates of the pipe when the tube propulsion direction is used as a reference. A through hole formed in at least one face plate, a rotary excavator that is positioned in front of one end opening of the pipe and that rotates around a rotation center line that intersects the propulsion direction of the pipe, and a rotary excavator A support body supported rotatably by the pipe, and a natural ground that is connected to the support body and moves the pipe away from the natural ground by a reaction force when pressing the natural ground via the through hole. Since the pushing means is provided, when the pushing direction of the pipe deviates from the planned pushing direction, the work of correcting the pushing direction of the pipe can be easily performed.
Further, since the through holes are respectively formed on a pair of surfaces facing each other of the pipe, and the ground pressing means are individually provided corresponding to the through holes, the propulsion direction of the pipe is shifted upward or downward Or the correction work when the tube propulsion direction is shifted to the left or right.
Further, the natural ground pressing means includes a jack fixed to the support body, and the jack pressing body is configured to press the natural ground, so that when the propulsion direction of the pipe deviates from the planned propulsion direction. The work of correcting the propulsion direction of the pipe can be easily performed.
Further, according to the tube propulsion direction adjusting device according to the present invention, the through-hole formed in at least one face plate among the tube having a square cross section and the upper, lower, left and right face plates of the tube when the tube propulsion direction is used as a reference. A rotating excavator that is positioned in front of one end opening of the pipe and that rotates about a rotation center line that intersects the propelling direction of the pipe, and a support that is supported by the pipe and that rotatably supports the rotary excavator A pipe installation device comprising: a body, and a natural ground pressing means that is connected to the support and moves the pipe in a direction away from the natural ground by a reaction force when the natural ground is pressed through the through hole; A camber that is inserted between the outer surface of the pipe and the natural ground via the through hole of the pipe installation device, and the pipe propulsion direction deviates from the planned propulsion direction while propelling the pipe into the ground. The natural ground pressing means presses the natural ground through the through hole. The tube is moved away from the natural ground by the reaction force, and the tube is propelled by pushing the tube after inserting the camber between the outer surface of the pipe separated from the natural ground and the natural ground through the through hole. Since the direction can be changed, the tube propulsion direction can be easily corrected when the tube propulsion direction deviates from the planned propulsion direction.

A cross-sectional view of a pipe installation device (embodiment 1). The longitudinal cross-sectional view of a pipe installation apparatus (embodiment 1). The figure which looked at the pipe installation apparatus from the back side (AA cross-section equivalent figure of FIG. 2) (Embodiment 1). The figure which shows the left-right rocking | fluctuation operation | movement of a rotary excavation body (Embodiment 1). The perspective view which shows the internal structure of a top pipe (embodiment 1). The longitudinal cross-sectional view of a pipe installation apparatus (embodiment 2). The figure which shows the propulsion direction correction method of a top pipe (embodiment 2).

Embodiment 1
Based on FIG. 1 thru | or FIG. 5, the basic composition and operation | movement of the pipe installation apparatus 1 for implement | achieving the pipe installation method in the underground by Embodiment 1 are demonstrated.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2, a drilling device 3, and a control device 65. 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. FIG. 5 illustrates front and rear, left and right, and up and down directions with respect to the propulsion direction F of the pipe installation device 1.

The pipe 2 installed in the ground by the excavator 3 is a curved pipe formed so as to bend and extend (a pipe whose center line is a curve), or a pipe that extends straight (the center line of the pipe is The tube is a straight tube), and the cross-sectional shape when the tube is cut along a plane orthogonal to the center line of the tube is formed by a square tube. As the pipe 2, for example, the pipe length (front / rear length) is 1.5 m, the left and right width is 1.2 m, and the vertical width is 0 when the propulsion direction F to the underground 10 is used as a reference A steel tube with a rectangular shape of 7 m is used.
The pipe 2 is a first pipe 6 that enters the ground first, and a plurality of subsequent pipes (not shown) that are sequentially connected to the first pipe 6 backward. In this way, a plurality of pipes 2 are sequentially connected and installed in the ground 10, thereby constructing a support structure formed of a continuous pipe whose center line is a curved line, a bent line, or a straight line.
One end opening edge 6z of the leading pipe 6 is formed in a tapered inclined surface so that it can easily bite into the natural ground 99.
A pair of face plates facing each other, for example, the upper surface plate 6A and the lower surface plate 6B, of the top tube 6 are formed with through holes 6H that constitute a part of the tube propulsion direction correcting means.

  As shown in FIG. 1, the excavating apparatus 3 includes an excavating machine 26, an excavating machine swing drive apparatus 25, a propulsion apparatus 70, a water supply apparatus 75, a mud draining apparatus 76, a natural ground pressing unit, and an interval. Maintaining means.

The natural ground pressing means includes a jack 80 for pressing the natural ground, a reaction force transmitting means for transmitting the reaction force when the jack 80 is fixed and the jack 80 presses the natural ground to the top pipe 6, and driving the jack 80. And a control device.
The interval maintaining means is configured by a camber 90 which is inserted between the outer surface of the leading pipe 6 and the ground 99 through the through hole 6H and maintains the distance between the outer surface of the leading pipe 6 and the ground 99. .
As shown in FIG. 2, the camber 90 is a member formed in, for example, a right-angled triangular cross section, and is gradually inserted between the outer surface of the top tube 6 and the ground 99 using the slope of the slope. It is a so-called wedge configured as possible.
The through-hole 6H formed in the leading pipe 6, the ground pressing means, and the interval maintaining means constitute pipe propulsion direction correcting means.
The pipe installation device 1 and the camber 90 constitute a pipe propulsion direction adjusting device that can easily correct the propulsion direction of the leading pipe 6 when the propulsion direction of the leading pipe 6 deviates from the planned propulsion direction. .

As shown in FIG. 1, 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. 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 distal end portion of the column 42.
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. Motor mounts 44 are provided at both ends of the branch column 43, and a casing 48 of a motor 47 is fixed to each motor mount 44; 44. The rotating shafts 49; 49 of the two motors 47; 47 extend in directions away from each other on a straight line perpendicular to the extending direction of the support column (that is, on the center line of the branch support column 43) from the tip end of the support column 42.
The rotary excavator 46 includes, for example, a circular box-shaped rotary body 50 having one end opening and the other end closed, which includes a cylindrical portion 50a and a bottom plate 50b that closes the other end of the cylindrical portion 50a, and an outer periphery of the cylindrical portion 50a of the rotary body 50. A plurality of excavation bits 52 provided on the surface 51 are provided.

  As shown in FIG. 2, the diameter of the circle connecting the tips of the excavation bits 52; 52... Provided on the outer peripheral surface 51 of the cylindrical portion 50a of the rotary body 50, that is, the maximum excavation diameter of the rotary excavation body 46 is When the rotary excavator 46 is recovered to the starting base, the rotary excavator 46 is pulled back into the pipe 2 so that the rotary excavator 46 is It is possible to collect at the departure base.

As the motor 47, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used. For example, in the case of using a hydraulic motor (hereinafter referred to as a hydraulic motor 47), a hydraulic pressure source hose 56 that forms a pressure oil supply path 56a and an oil return path 56b between a hydraulic source 55 as a drive source and the casing 48 of the hydraulic motor 47 forms a pressure resistant hose 56. Connected. That is, the pressure hose 56 is connected to the casing 48 of the hydraulic motor 47 through 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 rotation rotated by the hydraulic motor 47 and the inner surface 53 of the bottom plate 50b of the rotating body 50 so that the circle center of the inner surface 53 of the bottom plate 50b of the rotating body 50 of the rotary excavator 46 and the rotation center of the rotating shaft 49 coincide. A connecting plate 54 provided at the tip of the shaft 49 is connected by a connecting tool 57 such as a screw. That is, the two rotary excavating bodies 46; 46 are positioned in front of the leading opening 6t of the leading pipe 6, and the two rotary excavating bodies 46; 46 are one rotation center line L common to the two rotating shafts 49; 49. Is configured to rotate around the center of rotation. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header.

  The excavating machine swing drive device 25 includes a swing substrate 30, a guide member 31 of the swing substrate 30, and a swing substrate driving means 32.

In the pipe installation device 1, the guide member 31 is installed inside the top opening 6 t side of the top pipe 6 so that the center line of the cylindrical guide member 31 and the center line 6 </ b> X of the top pipe 6 coincide. The other pair of wall surfaces in which the water tightness between the outer peripheral surface 33 of the cylinder of the guide member 31 and the inner peripheral surface 6x of the leading tube 6 is maintained and the swinging substrate 30 faces the leading tube 6 in parallel with each other. (For example, the left and right inner surfaces 6a; 6b of the top tube 6 are attached to the guide member 31 so as to be able to swing back and forth with the center between the rotation centers as the center of rotation. The watertightness between the inner peripheral surface 35 and the inner peripheral surface 35 is maintained.
Then, the rotary excavator 46 of the excavating machine 26 provided with a plurality of excavating bits (excavating blades) 52 is ahead of the leading opening 6t of the leading pipe 6 in the propulsion direction of the leading pipe 6 (that is, the leading pipe 6 is connected to the center line of the pipe). In the case of propulsion in the direction along 6X, the support portion 40 that supports the rotary excavator 46 is positioned on the front side in the propulsion direction with respect to the opening in the propulsion direction of the leading pipe 6 and supported by the swing substrate 30. When excavating the natural ground 99 in front of the top pipe 6 with the rotary excavator 46, the swinging substrate driving means 32 moves back and forth by pressing and pulling back the rear surfaces of the pair of side walls 30a; 30b on the swinging substrate 30. As a result, the rotation center line L of the rotary excavation body 46 has a plane orthogonal to the propulsion direction F of the leading pipe 6 and a pair of wall surfaces of the leading pipe 6 facing each other in parallel (for example, the upper and lower inner surfaces of the leading pipe 6). 6c; first parallel to 6d) And a second state that is parallel to the one pair of wall surfaces of the leading pipe 6 facing each other in parallel and intersects with a plane perpendicular to the propulsion direction F of the leading pipe 6 in a state other than perpendicular. Is done.

The guide member 31 is formed of a cylinder having a square cross section, and is installed inside the front end side of the leading pipe 6 so that the center line of the guiding member 31 and the center line 6X of the leading pipe 6 are the same. Is done. When the guide member 31 cuts the top tube 6 along a plane in which the outer peripheral shape of the cross section when the guide member 31 is cut along a plane orthogonal to the center line of the cylindrical body of the guide member 31 is perpendicular to the center line of the top tube 6 The outer peripheral dimension of the cross section of the guide member 31 is formed to be substantially the same as the inner peripheral dimension of the front pipe 6.
A watertight performance maintaining member 34 such as rubber packing is provided on the outer peripheral surface 33 of the guide member 31 so as to go around the outer peripheral surface 33. With the circumferential surface 6x facing each other with a slight gap of about several mm (for example, 5 mm), the watertight performance maintaining member 34 and the inner circumferential surface 6x of the top tube 6 are in contact with each other, and the guide member 31 The guide member 31 is installed inside the top opening 6t side of the top tube 6 so that the water tightness between the outer peripheral surface 33 of the cylinder and the inner peripheral surface 6x of the top tube 6 is maintained.
The left and right side wall surfaces 35a; 35b of the inner peripheral surface 35 of the guide member 31 are formed in curved surfaces in which the front and rear intermediate portions are curved in a concave shape with a constant curvature along the front-rear direction of the leading pipe 6.

The swing substrate 30 is formed by a rectangular flat plate whose outer peripheral shape matches the inner peripheral shape of the guide member 31. The flat plate forming the oscillating substrate 30 has a thickness along the front-rear direction, and the left and right side walls 30a; 30b of the flat plate are left and right facing the curved surfaces of the left and right side wall surfaces 35a; 35b of the guide member 31. Are formed on a curved surface having the same curvature as the curved surface of the side wall surfaces 35a; 35b. For example, cylindrical protrusions 37; 37 (see FIG. 2) are provided at the center position between the left and right of the upper and lower end surfaces of the flat plate forming the swing substrate 30. The projections 37; 37 are fitted into circular holes 38; 38 formed on the upper and lower inner surfaces of the cylinder of the guide member 31, so that the projections 37; 37 function as a rotation center axis of the swing substrate 30. The left and right sides of the swing substrate 30 are configured to be swingable in the front-rear direction about the rotation center axis.
A watertight performance maintaining member 12 such as rubber packing is provided on the outer peripheral surface 39 of the flat plate of the rocking substrate 30 so as to go around the outer peripheral surface 39, and the inner peripheral surface of the flat plate outer peripheral surface 39 of the rocking substrate 30 and the guide member 31. The surface 35 is opposed to the surface 35 with a slight gap of about several mm (for example, 5 mm), and the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31 are in contact with each other, whereby the oscillating substrate 30. The watertightness between the outer peripheral surface 39 of the flat plate and the inner peripheral surface 35 of the cylindrical body of the guide member 31 is maintained. The watertight performance maintaining member 12 is provided in a groove formed on the outer peripheral surface 39 so as to make a round around the outer peripheral surface 39 of the flat plate of the oscillating substrate 30 so as to protrude from the outer peripheral surface 39. It can be stably installed on the outer peripheral surface 39 of the flat plate of the swing substrate 30 so that the performance can be sufficiently exhibited. The watertight performance maintaining member 12 is preferably provided on both the front and rear sides of the outer peripheral surface 39 of the flat plate of the swing substrate 30.

  As shown in FIG. 1; FIG. 3, the rocking substrate 30 has a column holding through hole 13, a mud pipe holding through hole 14, and a water supply pipe holding through hole 15 that penetrate the flat plate of the rocking substrate 30 back and forth. It is formed. As shown in FIG. 3, for example, the support holding through-hole 13 is formed so as to penetrate the central portion of the swinging substrate 30, and the sludge drain holding through-hole 14 is provided on the left and right sides of the lower side of the swinging substrate 30. Two are provided so as to penetrate. Two water supply pipe holding through holes 15 are provided so as to penetrate the left and right of the upper side of the swing substrate 30. The strut holding through-hole 13 is held in a fixed state in a state where the strut 42 of the support portion 40 of the excavating machine 26 penetrates. The mud pipe holding through holes 14; 14 are held in a fixed state with the tip of the mud pipe 76c penetrating therethrough. The water supply pipe holding through-holes 15; 15 are held in a fixed state in a state where the distal end portion of the water supply pipe 75c penetrates.

  The support portion 40, the rocking substrate 30, and the guide member 31 constitute a support body that is supported by the leading pipe 6 and that rotatably supports the rotary excavation body 46.

The swinging substrate driving means 32 includes a left / right swinging jack 16 serving as a drive source for swinging the rotary excavator 46 to the left and right, and a jack reaction force receiving member 18 forming a part of the propulsive force transmission component 64. And a jack drive control device (not shown).
The left / right swinging jack 16 is constituted by, for example, a hydraulic jack.
Two right-and-left swing jacks 16 are provided, one on each of the left end side and the right end side behind the swing substrate 30.
The left and right swinging jack 16A has a base end of the cylinder 16b and a left upper and lower center side of the rear surface 30r of the swinging substrate 30 connected by a movable connecting means 22 such as a hinge, and the inside of the cylinder 16b. The tip of a pressing body 16a such as a piston rod which is configured to be reciprocated by reciprocating movement and the jack reaction force receiving member 18 are connected by a movable connecting means 23 such as a hinge.
The right and left swinging jack 16B has a base end of the cylinder 16b and a right upper and lower center side of the rear surface 30r of the swinging substrate 30 connected by a movable connecting means 22 such as a hinge, and the inside of the cylinder 16b. The tip of a pressing body 16a such as a piston rod which is configured to be reciprocated by reciprocating movement and the jack reaction force receiving member 18 are connected by a movable connecting means 23 such as a hinge.
Then, as shown in FIG. 4A, when the pressing body 16a of the right and left swinging jack 16B is extended and the pressing body 16a of the left and right swinging jack 16A is retracted, the swinging substrate Since the right end of 30 moves to the front and the left end of the swing substrate 30 moves to the rear, the rotary excavator 46 swings to the left.
Further, as shown in FIG. 4B, when the pressing body 16a of the left and right swinging jack 16A is extended and the pressing body 16a of the right and left swinging jack 16B is retracted, the swinging substrate Since the left end of 30 moves to the front and the right end of the swing substrate 30 moves to the rear, the rotary excavator 46 swings to the right.

As described above, the pipe installation device 1 includes the excavating machine swing driving device 25 for swinging the rotary excavating body 46 in the left-right direction of the front pipe 6 in front of the front pipe 6. The rotary excavator 46 can be swung in the left-right direction with the center line 6X as a reference, and the natural ground 99 can be excavated in front of the top pipe 6 at a width interval wider than the left-right width interval of the top pipe 6. Since the front tube 6 can be dug in the left-right width direction in front of the tube 6, there is a possibility that one end opening 6 t of the front tube 6 may collide with the hard layer of the natural ground 99 when the front tube 6 is propelled. As a result, the front pipe 6 can be smoothly driven.
Further, by swinging the rotary excavator 46 leftward or rightward with respect to the center line 6X of the leading pipe 6, the propulsion direction F of the leading pipe 6 can be adjusted to the left and right.
Further, it is possible to cope with a case where only the right side in front of the front pipe 6 is to be excavated with priority and a case where only the left side in front of the front pipe 6 is to be excavated with priority.

In the first embodiment, as described above, the rotation center line L of the two rotary excavated bodies 46; 46 is parallel to the plane orthogonal to the propulsion direction F of the leading pipe 6 and parallel to the upper and lower inner surfaces of the leading pipe 6. When the natural ground 99 is excavated in the first state, the excavation width of the rotary excavation body 46 in the plane orthogonal to the propulsion direction F can be increased, and further, the excavation can be performed in a quadrangular cross section. The tube 2 can be easily installed in the underground 10.
Further, in the first embodiment, the excavating machine swing drive device 25 is operated, and the rotation center line L of the two rotary excavating bodies 46; 46 is perpendicular to the propulsion direction F of the top pipe 6 as shown in FIG. When the natural ground 99 is excavated in a second state that intersects with the upper and lower inner wall surfaces of the front pipe 6, the natural ground is wider at the left and right width intervals wider than the left and right width intervals of the front pipe 6 in front of the front pipe 6. 99 can be excavated, so when the leading pipe 6 is propelled, the possibility that the leading opening 6t of the leading pipe 6 collides with the hard layer of the natural ground 99 is reduced, and the leading pipe 6 can be smoothly propelled. Become.

The propulsion device 70 includes a propulsion drive source 61, the above-described guide member 31, propulsion force transmission means 62 that transmits the propulsive force generated by the propulsion drive source 61 to the guide member 31, and the propulsive force transmitted to the guide member 31 at the head. And a propulsive force receiving portion 63 that transmits to the tube 6.
The propulsive force receiving portion 63 is in contact with the front end surface 31a of the cylinder of the guide member 31 installed on the inner side of the front opening 6t of the front tube 6 to restrict the forward movement of the guide member 31 and to the guide member 31. In order to be able to transmit the propulsive force transmitted to the leading pipe 6, it is fixed to the inner surface of the leading pipe 6 on the leading opening 6t side by fixing means such as welding, bolts and nuts.
The propulsive force transmission means 62 includes a propulsive force transmission component 64, a propulsive force transmission rod 71, and a propulsion force transmitting member 72.

  As shown in FIG. 5, the propulsive force transmission component 64 is formed by combining, for example, H-section steel. For example, it is connected to the left end rear end face of the guide member 31 so as to be connected to the front left and right extension post 64a, and is extended to be connected to the right end rear end face of the guide member 31 so as to extend vertically. A front left upper and lower extension post 64b, a rear left upper extension post 64c connected to the left end of the jack reaction force receiving member 18 and extending vertically, and a right end of the jack reaction receiving member 18; A rear right vertical extension column 64d that is connected so as to extend vertically, and a front end and a front left vertical extension column 64a that extend in the front-rear direction are connected to a rear end and a rear left vertical extension column 64c. The upper left connecting part 64e, the lower left connecting part 64f, the left central connecting part 64g connected to each other, the front end and the front right upper and lower extension pillar part 64b extending in the front-rear direction, and the rear end and the rear right upper and lower extension extending Right where the column part 64d is connected Comprises side connecting portion 64h, the lower right side connecting portion 64i, a right central connecting portion 64j.

As shown in FIG. 1, the propulsive force transmission rod-like body 71 has a length from one end to the other end that is shorter than the shortest distance between the rear end surface 64x of the propulsive force transmission component 64 and the rear end surface 102e of the leading pipe 6. It is a rod-shaped body formed in a long dimension. As the propulsive force transmission rod-shaped body 71, for example, H-shaped steel is used.
The propulsive force transmission rod-like body 71 is installed such that the center line faces the same direction as the center line of the leading pipe 6. The front end surface of the left propulsive force transmitting rod-like body 71A and the upper and lower center positions on the rear surface of the rear left upper / lower extension column portion 64c are connected, and the front end surface of the right propulsive force transmission rod-like body 71B and the rear right upper / lower extension column portion 64d. The upper and lower center positions on the rear surface are connected.

  The propulsion drive source 61 is constituted by, for example, a hydraulic jack 61A. The hydraulic jack 61A includes a cylinder 61c, a pressing body 61a such as a piston rod that is attached to the cylinder 61c and can be expanded and contracted by the hydraulic pressure in the cylinder 61c, and a pressing head 61b provided at the tip of the pressing body 61a. This is a configuration provided. The cylinder 61c of the hydraulic jack 61A is fixed to a jack reaction force receiving member (not shown).

And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end face 102e of the leading pipe 6, and the left and right propelling force transmitting rod-like bodies 71A; 71B Are connected to the other end by a bolt or a vise device not shown in the figure, and the central portion between the other ends of the left and right propulsive force transmitting rods 71A; 71B in the abutting member 72 is pressed by the pressing head 61b of the hydraulic jack 61A. Thus, the pressing force by the hydraulic jack 61A is transmitted to the leading pipe 6 and the rotary excavation body 46; 46 via the propulsive force transmitting rod 71, the propulsive force transmitting component 64, the guide member 31, and the propulsive force receiving portion 63. Therefore, the leading pipe 6 propels forward and the rotary excavator 46; 46 propels forward.
In this case, the right propulsive force transmitting rod-like body 71B connected to the upper and lower central positions on the rear surface of the rear right upper and lower extension post 64d and the left side connected to the upper and lower central positions on the rear surface of the rear left upper and lower extension post 64c. Since the propulsive force transmitted to the propulsive force transmitting component 64 via the propulsive force transmitting rod 71A is transmitted to the four corners of the rear end surface 31x of the guide member 31 (see FIG. 1), the guide member 31 Thus, the propulsive force can be transmitted evenly, the posture of the guide member 31 can be maintained stably, and the rocking motion of the excavating machine rocking drive device 25 can be stabilized.

The water supply device 75 includes a water storage tank 75a, a pump 75b for water supply, a water supply pipe 75c, and a water supply pipe holding through hole 15 that holds a front end opening of the water supply pipe 75c.
The water supply pipe 75c includes a front part 75x that is held in the water supply pipe holding through-hole 15 and a main part 75y that is connected to the rear end of the front part 75x and extends outward from the rear end opening of the leading pipe 6. . For example, the front portion 75x is formed of a steel pipe, and the main portion 75y is formed of a hard vinyl bellows tube. The front end opening side of the front portion 75x is fixed to the water supply pipe holding through hole 15 of the swing substrate 30 so that water can be discharged to the natural ground 99 in front of the front surface 30f of the swing substrate 30 and the front portion 75x. The rear end opening side is provided so as to protrude rearward from the rear surface 30 r of the swing substrate 30. The rear end opening of the front portion 75x and the front end opening of the main portion 75y are connected so as to communicate with each other, and the rear end opening of the main portion 75y and the discharge port of the water supply pump 75b are connected so as to communicate with each other. And the suction port of the pump 75b for water supply and the water storage tank 75a are connected so that communication is possible by the connecting pipe outside a figure. Two systems of water supply devices 75 are provided on the left and right sides inside the upper portion of the top pipe 6. Note that the front end opening of the front portion 75x is positioned on the inner surface side of the head tube 6 so that the water supply tube 75c does not contact the left and right inner surfaces of the head tube 6 when the rocking substrate 30 swings. The rear end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 75x is provided such that the center line 6X of the tube extends from the inner side surface 6a; 6b side of the top tube 6 to the center side of the top tube 6 while being inclined.

The mud drain device 76 includes a mud tank 76a, a pump 76b for mud, a mud pipe 76c, and a mud pipe holding through hole 14 that holds the front end opening of the mud pipe 76c.
The drainage pipe 76c includes a front part 76x held in the drainage pipe holding through hole 14 and a main part 76y connected to the rear end of the front part 76x and extending outward from the rear end opening of the leading pipe 6. . For example, the front portion 76x is formed of a steel pipe, and the main portion 76y is formed of a hard vinyl bellows tube. The front end opening side of the front portion 76x is fixed to the drainage pipe holding through hole 14 of the swinging substrate 30 so that the excavated soil gathered in front of the front surface 30f of the swinging substrate 30 can be taken in through the front end opening. The rear end opening side of the front portion 76x is provided so as to protrude rearward from the rear surface 30r of the swing substrate 30. The rear end opening of the front portion 76x and the front end opening of the main portion 76y are connected so as to communicate with each other, and the rear end opening of the main portion 76y and the suction port of the mud pump 76b are connected so as to communicate with each other. And the discharge port of the pump 76b for mud and the mud tank 76a are connected so that communication is possible by a connecting pipe outside the figure. Two systems of the mud discharge device 76 are provided on the left and right sides inside the lower portion of the top pipe 6. It should be noted that the front end opening of the front portion 76x is positioned on the inner surface side of the front pipe 6 so that the sludge pipe 76c does not contact the left and right inner surfaces of the front pipe 6 when the swing substrate 30 swings. The rear end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 76x is provided such that the center line 6X of the tube extends from the left and right inner surfaces 6a;

In addition, the water storage tank 75a and the waste mud tank 76a are comprised by the collection tank 75X which the water storage tank 75a and the waste mud tank 76a integrated, for example. 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 mud tank 76a.
That is, when a certain amount of water is initially filled in the collecting tank 75X, and the water pump 75b is driven to pump water forward of the swing substrate 30, the water pumped forward of the swing substrate 30 is supplied. And the earth and sand excavated by the rotary excavator 46; 46 are mixed to form muddy water. Then, the mud water in front of the swing substrate 30 is discharged to the mud tank 76a by driving the mud pump 76b. Mud in the mud discharged to the waste mud tank 76a settles on the bottom of the waste mud tank 76a, and the mud that has entered the water storage tank 75a beyond the partition 75w is again fed by the pump 75b for water supply by the swing substrate 30. It is pumped forward. That is, since the muddy water can be circulated and supplied to the front of the rocking substrate 30, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied to the front of the rocking substrate 30, it can resist the pressure of the ground and groundwater, and the pressure of the ground and groundwater and the pressure supplied to the front of the rocking substrate 30 are equal. Therefore, the influence on the underground 10 such as land subsidence can be reduced. Moreover, since the front of the rocking substrate 30 becomes muddy water, the mud can be drained smoothly and excavation is facilitated.
The muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the front of the oscillating substrate 30 and the collecting tank 75X by driving the water supply pump 75b.

As shown in FIG. 2; FIG. 3, the natural ground pressing means includes a jack 80 provided so as to be able to press natural ground 99 through a through hole 6H formed in the leading pipe 6, and the jack 80 is fixed. The reaction force transmitting means for transmitting the reaction force when the jack 80 presses the natural ground to the leading pipe 6 and a drive control device (not shown) for driving and controlling the jack 80 are configured.
The reaction force transmission means includes a jack installation portion 81 to which the jack 80 is fixed, a propulsive force transmission component 64 to which the jack installation portion 81 is fixed, and a guide member 31 to which the propulsion force transmission component 64 is fixed. Is done.
The jack 80 is constituted by, for example, a hydraulic jack. The hydraulic jack includes a cylinder 80a, a pressing body 80b such as a piston rod attached to the cylinder 80a and configured to be extendable and contractable by the hydraulic pressure in the cylinder 80a, and a pressing head 80t provided at the tip of the pressing body 80b. It is a configuration.
The jack 80 includes an upper jack provided so as to be able to press the natural ground 99 through a through hole 6H formed in the upper surface plate 6A located behind the guide member 31, and a lower jack located behind the guide member 31. It is provided with a lower jack provided so that the natural ground 99 can be pressed through a through hole 6H formed in the face plate 6B.
That is, as shown in FIG. 3, the upper jack is provided on the upper left side so as to be able to press the natural ground 99 through a through hole 6H formed on the left side of the upper surface plate 6A located behind the guide member 31. A jack 80A1 and an upper right jack 80A2 provided so as to be able to press the natural ground 99 through a through hole 6H formed on the right side of the upper surface plate 6A located behind the guide member 31 are provided.
The lower jack includes a lower left jack 80B1 provided so as to be able to press the ground 99 through a through hole 6H formed on the left side of the lower surface plate 6B located behind the guide member 31, and the guide member 31. And a lower right jack 80B2 provided so as to be able to press the natural ground 99 through a through hole 6H formed on the right side of the lower surface plate 6B.
The jack installation portion 81 includes a left jack installation portion 81A fixed to a left center side connection portion 64g that forms a part of the propulsive force transmission component 64, and a right center side that forms a portion of the propulsion force transmission component 64. A right jack installing portion 81B fixed to the connecting portion 64j.
Then, the base end of the cylinder 80a of the upper left jack 80A1 is placed on the upper surface of the left jack installation portion 81A so that the center lines of the upper left jack 80A1 and the lower left jack 80B1 are orthogonal to the upper inner surface 6c and the lower inner surface 6d of the leading pipe 6. Is installed in a fixed state, and the base end of the cylinder 80a of the lower left jack 80B1 is installed in a fixed state on the lower surface of the left jack installation portion 81A.
Further, the base end of the cylinder 80a of the upper right jack 80A2 is placed on the upper surface of the right jack installation portion 81B so that the center lines of the upper right jack 80A2 and the lower right jack 80B2 are orthogonal to the upper inner surface 6c and the lower inner surface 6d of the leading pipe 6. Is installed in a fixed state, and the base end of the cylinder 80a of the lower right jack 80B2 is installed in a fixed state on the lower surface of the right jack installation portion 81B.
That is, the jack 80 is connected to the guide member 31 of the support via the jack installation portion 81 and the propulsive force transmission configuration portion 64.

Next, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
An assembly in which the excavating machine 26, the excavating machine swing drive device 25, the propulsion device 70 excluding the pad 72, the water supply pipe 75c, and the sludge pipe 76c is assembled from the rotary excavating body 46 side. The lead pipe 6 is inserted into the lead pipe 6 through the rear end opening, and the front end face 31a of the guide member 31 is brought into contact with the thrust receiving portion 63 fixed to the inside of the lead pipe. And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmission rod-like bodies 71A; 71A; It connects with the other end of 71B with a volt | bolt outside a figure, a vise, etc. Then, the water supply pump 75b is driven to supply muddy water to the front of the oscillating substrate 30, and the muddy water is circulated between the front of the oscillating substrate 30 and the inside of the collecting tank 75X. The propulsive force is transmitted by transmitting the propulsive force by operating the propulsion drive source 61 and applying the propulsive force to the abutting member 72 while supplying the hydraulic oil from the hydraulic source 55 to the hydraulic motor 47 and rotating the rotary excavator 46. It is transmitted to the leading pipe 6 and the rotary excavating body 46; 46 through the rod-like body 71, the propulsive force transmitting component 64, the guide member 31, and the propelling force receiving part 63. 46 propels forward. At this time, the right and left swinging jack 16 is operated to swing the left and right walls 30a and 30b of the swinging substrate 30 back and forth, so that the rotary excavator 46 swings in the left and right direction of the top pipe 6 in a swinging manner. Move and excavate natural ground 99. As a result, the ground 99 is excavated with a width between the left and right widths wider than the left and right width of the top pipe 6 in front of the top pipe 6, so that when the top pipe 6 is propelled, the tip of the top pipe 6 is hard ground. The possibility of colliding with the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.
After the front pipe 6 is installed in the ground 10 leaving the rear end face 102e of the front pipe 6, a subsequent pipe (not shown) is connected to the rear end face 102e of the front pipe 6 by welding or a fastener such as a bolt, Furthermore, the other end of the leading thrust transmission rod 71 and one end of the trailing thrust transmission rod 71 are joined by bolts or welding, so that the trailing thrust transmission rod 71 is connected to the rear of the trailing thrust transmission rod 71. The propulsion force transmitting rod 71 is added, an extension pressure hose (not shown) is added to the other end of the pressure hose 56, and an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c. An extended drainage pipe (not shown) is added to the other end of 76c. Then, the abutting member 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B protruding rearward from the rear end edge of the succeeding pipe, and the abutting member 72 is pressed by the hydraulic jack 61A. By rotating the rotary excavator 46; 46 while pressing with 61a, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe is installed in the ground.
Thereafter, similarly, the subsequent succeeding pipe is sequentially connected to the rear end edge of the previous succeeding pipe and is installed in the ground 10, so that, for example, a support work, an invert or the like can be constructed.

After completing the installation work of the pipe 2 (the leading pipe 6 and the subsequent pipe), the excavating machine 26 and the like are pulled back to the starting base that is the excavation start point and collected. According to the first embodiment, since the propulsive force transmission rod-shaped body 71 is added, when the excavating machine 26 and the like are collected, the propulsive force transmission rod-shaped body 71 1 is selected from the rearmost propulsive force transmission rod-shaped body 71 side. The excavating machine 26 and the like can be easily recovered by pulling back to the departure base one by one and removing the propelling force transmission rod 71 in order from the tail side to the head. In this case, since the hydraulic jack 61A, which is an example of the propulsion device, only needs to be installed at the departure base serving as the excavation start point, the device cost can be reduced.
In addition, you may make it collect | recover by pushing the excavating machine 26 grade | etc., To a arrival base.
For example, after the top pipe 6 is pushed out to the arrival base and the propulsion force receiving portion 63 is removed, the excavating machine 26 and the like are pushed out to the arrival base and collected. In this case, the work of pushing the excavating machine 26 and the like to the arrival base is easier than the work of pulling the excavating machine 26 and the like back to the departure base, and the recovery work of the excavating machine 26 and the like becomes easier.

In the first embodiment, when the head pipe 6 is installed in the ground using the pipe installation device 1 provided with the pipe propulsion direction correcting means, is the head pipe 6 advanced in the designed direction by the measurement means (not shown)? If it is detected that the propulsion direction of the leading pipe 6 is deviated from the planned position, the propulsion direction of the leading pipe 6 is changed using the pipe propulsion direction correcting means. Thus, the propulsion direction of the leading pipe 6 can be corrected, and the installation position accuracy of the leading pipe 6 can be improved.
Various factors are conceivable as factors that cause the propulsion direction of the leading pipe 6 to deviate from the planned position. For example, when the hardness of the ground varies depending on the location, it may be possible to propel the top pipe 6 downward.

In the first embodiment, when the actual propulsion direction of the leading pipe 6 is shifted upward from the planned propulsion direction, the pressing is performed by extending the pressing body 80b of the upper jacks 80A1 and 80A2. When the pressing head 80t of the body 80b passes through the through hole 6H formed in the upper surface plate 6A of the top tube 6 and presses the natural ground 99, the upper jack 80A1; 80A2 receives the reaction force from the natural ground 99, The reaction force is transmitted to the top tube 6 via the jack installation portion 81, the propulsion force transmission component 64, and the guide member 31, whereby the top tube 6 moves downward.
At this time, since a gap for inserting the camber 90 is formed between the top surface of the top pipe 6 and the ground 99, the upper jack 80A1 is inserted after the camber 90 is inserted into the gap via the through hole 6H; The pushing body 80b of 80A2 is retracted to be in an inoperative state, and the propulsion operation of the leading pipe 6 is resumed while the distance between the upper surface of the leading pipe 6 and the ground 99 is maintained by the camber 90. Since the propulsion direction can be changed downward so as to approach the planned propulsion direction and the deviation of the propulsion direction of the leading pipe 6 can be corrected, the installation position accuracy of the leading pipe 6 can be improved.
Further, when the actual propulsion direction of the leading pipe 6 is shifted downward from the planned propulsion direction, the pressing body 80b is pressed by operating the pressing body 80b of the lower jacks 80B1 and 80B2 to extend. When the head 80t passes through the through hole 6H formed in the lower surface plate 6B of the leading pipe 6 and presses the natural ground 99, the lower jacks 80B1 and 80B2 receive the reaction force from the natural ground 99, and the reaction force is The leading pipe 6 is moved upward by being transmitted to the leading pipe 6 through the jack installation portion 81, the propulsive force transmission component 64 and the guide member 31.
At this time, since a gap for inserting the camber 90 is formed between the lower surface of the top pipe 6 and the ground 99, the lower jack 80B1 is inserted after the camber 90 is inserted into the gap via the through hole 6H; The pushing direction of the pipe is resumed by depressing the pressing body 80b of 80B2 to be in an inoperative state and restarting the pushing work of the leading pipe 6 with the camber 90 maintaining the distance between the lower surface of the leading pipe 6 and the ground 99. Can be changed upward so as to approach the planned propulsion direction, and the deviation of the propulsion direction of the leading pipe 6 can be corrected, so that the installation position accuracy of the leading pipe 6 can be improved.
It should be noted that after the camber 90 is interposed as a spacer between the leading pipe 6 formed by operating the jack and the ground 99, the jack is inactivated so that the jack is not in operation. The camber 90 may be inserted, or the camber 90 is driven between the head pipe 6 and the ground 99 formed by operating the jack, and the camber 90 is inserted between the head pipe 6 and the ground 99. You may make it insert.

In the pipe installation device 1 according to the first embodiment, the through hole 6H is formed on each of the upper face plate 6A and the lower face plate 6B as a pair of face plates facing each other of the leading pipe 6, and the jacks 80 of the natural ground pressing means are respectively passed through. Since the configuration is provided individually corresponding to the hole 6H, the correction work can be easily performed when the propulsion direction of the leading pipe 6 is shifted upward or downward.
The through holes 6H are respectively formed in the left and right face plates as the other pair of face plates facing each other of the leading pipe 6, and the jacks 80 of the ground mountain pressing means are individually provided corresponding to the through holes 6H. By doing so, it becomes possible to easily perform correction work when the propulsion direction of the leading pipe 6 is shifted to the left or right.

Embodiment 2
As shown in FIG. 6, the minimum bit-to-tip dimension 46S located on a line parallel to the first line 46A perpendicular to the rotation center line 46x of the rotary excavation body 46, the rotation center line 46x of the rotary excavation body 46 and the first The maximum bit-to-tip dimension 46L positioned on a line parallel to the second line 46B orthogonal to the line 46A is configured, and the maximum bit-to-tip dimension 46L is above and below the pipe 2 perpendicular to the rotation center line 46x of the rotary excavator 46. When the rotary excavator 46 is rotated in front of the top tube 6 because the minimum distance between the outer surfaces of the pipes is smaller than the shortest distance between the upper and lower inner surfaces of the pipe 2. In addition, it is possible to excavate the top and bottom of the natural ground 99 in front of the top pipe 6, that is, to excavate the vertical width larger than the top and bottom width of the top pipe 6, and collect the rotary excavation body 46 at the starting base. When doing By setting the maximum vertical width of the rotary excavator 46 to be the minimum dimension 46S between the bit tip ends, the rotary excavator 46 can be pulled back into the pipe 2, and the rotary excavator 46 is recovered to the starting base. It becomes possible.

In the case of the rotary excavator 46 of the second embodiment, it is possible to excavate the top and bottom of the natural ground 99 in front of the leading pipe 6, that is, to excavate the vertical width larger than the vertical width of the leading pipe 6. For example, in the operation of installing the pipe 2 in the ground 10 to construct a support for inverting the tunnel, as shown in FIG. 7 (a), the top pipe 6 is directed downward to the underground 10 In the case of propulsion, the head tube 6 is moved downward by gravity because the head tube 6 is propelled while performing excavation in the vertical and horizontal directions with respect to the propulsion direction as a reference for the natural ground 99 ahead of the head tube 6 in the propulsion direction. Therefore, the actual propulsion direction of the leading pipe 6 may deviate from the planned propulsion direction F1.
Therefore, at this time, if it is detected that the actual propulsion direction of the leading pipe 6 is shifted downward as compared with the planned propulsion direction F1, as shown in FIG. 7B, the lower jack 80B1 By operating the pressing body 80b of 80B2 to extend, the pressing head 80t of the pressing body 80b passes through the through hole 6H formed in the lower surface plate 6B of the top tube 6 and presses the natural ground 99. The lower jacks 80B1 and 80B2 receive a reaction force from the natural ground 99, and the reaction force is transmitted to the leading pipe 6 via the jack installation portion 81, the propulsion force transmission component 64, and the guide member 31, Since the leading pipe 6 moves upward, a gap for inserting the camber 90 is formed between the lower surface of the leading pipe 6 and the ground 99. Then, the worker enters the leading pipe 6 and moves to the inside of the leading pipe 6, and the camber 90 is inserted between the lower surface of the leading pipe 6 and the ground 99 through the through hole 6 </ b> H. Then, after the worker retreats from the inside of the top pipe 6, the pressing body 80b of the lower jacks 80B1; 80B2 is retracted to be in an inoperative state, and then the top pipe 6 is supported by the camber 90. When the propulsion operation is resumed, the propulsion direction of the leading pipe 6 can be corrected so as to approach the scheduled propulsion direction F1, and the installation position accuracy of the leading pipe 6 can be improved.

  In addition, if the camber 90 mentioned above prepares the thing of multiple types of thickness, the appropriate correction operation according to the deviation | shift amount of the propulsion direction of the top pipe 6 will be attained.

  Further, one or more through holes 6H may be formed in at least one face plate among the top, bottom, left, and right face plates of the top pipe when the propulsion direction of the top pipe 6 is used as a reference, and corresponds to the through hole. A jack 80 may be provided.

Moreover, although the example which provided the through-hole 6H shared as a through-hole for allowing the press body of the jack 80 to pass through and the through-hole for inserting the camber 90 was shown above, it passes through the press body of the jack 80. The through hole to be inserted and the through hole for inserting the camber 90 may be provided separately.
Moreover, the shape of the through hole is not particularly limited.

  Further, the present invention does not include a mechanism for swinging the rotary excavator 46 to the left and right, and includes a rectangular flat plate-shaped partition wall substrate as a support having an outer peripheral surface corresponding to the inner peripheral surface of the leading pipe 6, The present invention can also be applied to a pipe installation device having a configuration in which the rotary excavation body 46 is fixed to the partition board via the support portion 40.

  Further, the natural ground pressing means may be installed in the pipe installation device during the operation of correcting the deviation in the propulsion direction of the leading pipe 6.

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

  Further, the tube 2 only needs to have a quadrangular cross-sectional shape, and the cross-sectional shape referred to in the present invention refers to a quadrilateral shape such as a cross-sectional rectangle, a cross-sectional square, a cross-sectional trapezoid, a cross-sectional parallelogram, The thing of the shape where the square corner | angular part was chamfered is also included.

  In addition, the subsequent pipe is not connected to the rear end of the pipe that is first inserted into the ground, and only the pipe that is first inserted into the underground 10 from the starting base is installed in the underground 10 and the pipe that is inserted into the underground 10 first. It is also possible to form a support work by only (that is, one pipe).

1 pipe installation device, 2 pipes, 6 top pipe (pipe), 6H through hole,
6t top opening (one-end opening), 10 underground, 46 rotating excavations,
80 jack (natural ground pressing means), 80b pressing body,
90 camber (distance maintaining means), 99 ground, F propulsion direction of the top pipe,
F1 Propulsion direction of the first pipe.

Claims (5)

A pipe having a square cross section, a rotary excavator that rotates on a rotational center line that is positioned in front of one end opening of the pipe and intersects the propulsion direction of the pipe, and that rotatably supports the rotary excavator. Using a pipe installation device with a support to be supported, rotating the rotary excavator and excavating the natural ground while applying a driving force to the rotary excavator and the pipe, In the pipe installation method installed in
As the tube, a tube having a through hole formed in at least one face plate of the upper, lower, left, and right face plates of the tube when the tube propulsion direction is used as a reference,
Provided with a natural ground pressing means for moving the tube in a direction away from the natural ground by a reaction force when connected to the support and pressing the natural ground through the through hole,
When the pipe propulsion direction deviates from the planned propulsion direction while propelling the pipe into the ground, the pipe is moved in a direction away from the ground with a reaction force by pressing the ground through the through hole. By inserting a distance maintaining means for maintaining the distance between the ground surface and the outer surface of the pipe between the outer surface of the pipe and the ground surface away from the natural ground through the through hole, the tube is propelled by propelling the tube. A pipe installation method characterized by changing the propulsion direction. A pipe installation device used in the pipe installation method according to claim 1,
A tube having a square cross section, a through-hole formed in at least one of the top, bottom, left, and right face plates of the tube when the tube propulsion direction is used as a reference; A rotary excavator that rotates about a rotation center line that intersects the propulsion direction, a support that rotatably supports the rotary excavator, and a pipe that is supported by a pipe, and is connected to the support via a through hole. A pipe installation device comprising: a natural mountain pressing means for moving the pipe in a direction away from the natural mountain by a reaction force when pressing the mountain.   3. The pipe installation device according to claim 2, wherein the through holes are respectively formed on one pair of surfaces facing each other of the pipe, and the ground pressing means are individually provided corresponding to the through holes.   The pipe installation device according to claim 2 or 3, wherein the natural ground pressing means includes a jack fixed to a support, and the pressing body of the jack presses the natural ground. . A tube having a square cross section, a through-hole formed in at least one of the top, bottom, left, and right face plates of the tube when the tube propulsion direction is used as a reference; A rotary excavator that rotates about a rotation center line that intersects the propulsion direction, a support that rotatably supports the rotary excavator, and a pipe that is supported by a pipe, and is connected to the support via a through hole. A pipe installation device provided with a natural ground pressing means for moving the pipe away from the natural ground by a reaction force when pressing the mountain, and an outer surface of the pipe and the natural ground via a through hole of the pipe installation device And a camber inserted between
When the pipe propulsion direction deviates from the planned propulsion direction during the course of propelling the pipe into the ground, the pipe is moved away from the ground by the reaction force caused by the natural ground pressing means pressing the ground through the through hole. It is possible to change the propulsion direction of the pipe by moving it in the direction and propelling the pipe after inserting the camber through the through hole between the outer surface of the pipe separated from the natural ground and the natural ground Pipe propulsion direction adjusting device.

Images