JP6006570B2 - Pipe installation method - Google Patents

Description

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

Conventionally, it is a pipe installation device for installing a pipe having a square cross section in the ground, and a rotary excavator that rotates around a rotation center line orthogonal to the propulsion direction of the pipe is provided inside the front side of the pipe. A pipe installation device is known (see, for example, Patent Documents 1 and 2).
In addition, in order to prevent the tip of the pipe from colliding with the hard ground and not proceeding, the rotary excavator is installed in front of the top opening of the pipe, and the rotation center line of the rotary excavator is connected to the pipe. The rotary excavator is set in a state that is parallel to one pair of outer surfaces facing each other in parallel and intersects with a surface other than perpendicular to a surface orthogonal to the propulsion direction of the tube, and the other of the rotary excavator is parallel to each other The excavating machine swing drive device that can be moved to the outside of the pair of outer surfaces is provided, and the rotary excavator is swung in front of the pipe prior to the progress of the pipe so that it is wider than the cross-sectional area of the pipe. The present applicant has filed a pipe installation apparatus that can excavate the cross-sectional area and can smoothly push the pipe in the ground even when the ground is hard ground (Japanese Patent Application No. 2011-2011). 244272).

JP 2011-52528 A JP 2012-117275 A

When the pipe excavator having the swingable rotary excavator described above is used and the rotary excavator is swung, the rotary excavator moves to the outside of the other pair of outer surfaces of the pipe in front of the pipe. . Therefore, when the next pipe is installed in the ground using the pipe installation device so that it is aligned with the pipe installed in the ground first, the swung rotary excavator is the same as the pipe installed in the ground first. There is a possibility of colliding with the outer surface, and when the outer surface of the pipe previously installed in the ground and the rotary excavation body collide in this way, not only can the pipe and the rotary excavation body be damaged, There was a problem that the propulsion direction of the next pipe would deviate from the intended propulsion direction.
The present invention relates to a method of installing a pipe in the ground using a pipe installation device having a swingable excavator, and the next pipe is placed in the ground so as to be aligned with the pipe previously installed in the ground. Provided is a pipe installation method capable of preventing a collision between a rotary excavation body that is positioned in front of the next pipe and swings when installed and an outer surface of a pipe that is already installed in the ground.

According to the pipe installation method according to the present invention, when a pipe having a quadrangular cross section is installed in the ground, a rotation center line parallel to a plane perpendicular to the propulsion direction of the pipe is set as the rotation center in front of the top opening of the pipe. A pipe installation device that installs a rotating rotary excavator, advances the pipe and excavates the ground with the rotary excavator, thereby propelling the pipe and installing it in the ground. Is set to a state that is parallel to one pair of outer faces of the pipe that are parallel to each other and intersects with a plane that is orthogonal to the plane orthogonal to the propulsion direction of the pipe, so that the rotary excavator is parallel to the pipe. In a pipe installation method using a pipe installation device provided with an excavating machine rocking drive device that can be moved outwardly from the other pair of opposed outer surfaces, after the pipe is installed in the ground, the underground Install the next pipe in the ground so that it is aligned with the previous pipe installed in If, provided with one guide means on the outer surface of one of the pair of outer surfaces opposed to each other of the tubes to be installed in the ground earlier, a pair of outer facing each other of the tubes installed in the ground earlier A rotary excavator located in front of the head opening of the next pipe swings on the outer face of the next pipe installed in the ground so that it is aligned with the outer face of one of the side faces. provided a collision prevention means for preventing the rotary excavation element is already collides with one of the outer side surface of the preceding tube are installed in the ground when moving outside the pair of outer surfaces of the guide The means is a tube in which one long side edge side of a long member having an L-shaped cross section in which one long side edge side surface and the other long side edge side surface form a right angle is first installed in the ground. It is fixed to one outer surface, and is configured so that the surface on the other long edge side and one outer surface of the pipe form a right angle. The prevention means is provided with one outer surface fixed to the outer surface of the next tube, and extending from the end of the one outer surface so as to be perpendicular to the outer surface of the next tube, and the guide means The other long side edge side surface of the guide member and the other long side edge side surface of the guide means protruding from the one outer side surface of the tube. Set to be shorter than the protruding length of the other outer surface that protrudes from the outer surface of the next tube, and is aligned with the outer surface of one of the tubes previously installed in the ground by the anti-collision means and next to the tube. The minimum dimension of the gap formed between the outer surface of the next pipe installed on the pipe is the same as the outermost end of the rotary excavator at the maximum swing and the outer surface of the pipe on the side of the rotary excavator swinging direction. It was set to a distance longer than the shortest distance from the virtual plane so that it would line up with the pipe installed in the ground first When the next pipe is installed in the ground, it is possible to prevent a collision between the rotating excavated body positioned in front of the next pipe and swinging and the outer surface of the pipe already installed in the ground first , The propulsion direction of the next pipe in the ground is accurately guided by the collision prevention means and the guide means.

Sectional drawing which shows the relationship between the guide means of a previous pipe | tube, and the collision prevention means of the following pipe | tube. The figure which shows the installation procedure of a pipe | tube. The perspective view which shows the support construction method by a front pipe and a succeeding pipe. The disassembled perspective view which decomposes | disassembles and shows a pipe | tube, a guide means, and a collision prevention means. The perspective view which shows the pipe | tube provided with the guide means and the collision prevention means. The cross-sectional view of a pipe installation apparatus. The longitudinal cross-sectional view of a pipe installation apparatus. The figure which looked at the rear surface side of the rocking | fluctuation board | substrate from the back side (AA cross-section equivalent figure of FIG. 7). The perspective view which shows the internal structure of a top pipe. The figure which shows the rocking | fluctuation state of a rotary excavation body. Sectional drawing which shows the structure of a water stop process part.

Embodiment 1
In the first embodiment, a pipe installation device 1 (see FIGS. 6 to 10) having a swingable excavating body 46 described later is used to install the pipe 2 having a square cross section in the ground 10. As shown in FIG. 4 to FIG. 4, after the pipe 2 is installed in the underground 10, the next pipe 2 is installed in the underground 10 so as to be arranged next to the previous pipe 2 installed in the underground 10. The other of the next pipe 2 installed in the underground 10 so as to be arranged next to one outer surface 2a of the pair of outer surfaces 2a; 2b facing each other of the pipe 2 previously installed in the underground 10 The rotary excavator 46 (see FIG. 6) positioned in front of the leading opening of the next pipe 2 (leading opening 6t of the leading pipe 6) swings on the outer surface 2b of When the next pair of outer side surfaces 2a; 2b of the next pipe 2 moves to the outside of the pipe 2 with respect to the scheduled travel surface, the rotary excavation body 46 is moved first. The collision prevention means 100 for preventing the collision in the one of the outer surface 2a of the tube 2 which is installed in the 10 provided.
Further, the next pipe 2 installed in the underground 10 so as to be arranged next to the pipe 2 previously installed in the underground 10 on one outer side surface 2a of the pipe 2 previously installed in the underground 10. A guide means 120 is provided to guide the collision preventing means 100 provided on the other outer surface 2a of the tube 2 and guide the traveling direction of the next pipe 2 in the ground 10.

The pipe 2 installed in the underground 10 by the pipe installation device 1 is a curved pipe formed such that the pipe bends and extends in a circular arc (the center line of the pipe (the center of the cross section perpendicular to the extending direction of the pipe). A straight line connecting the points along the extension direction of the pipe) or a straight pipe where the pipe extends straight (a pipe whose center line is a straight line). A cross-sectional shape when the tube is cut along a plane orthogonal to the center line (center axis) is formed by a square tube.
As the pipe 2, for example, a steel pipe is used. For example, when the tube 2 is a tube having a rectangular cross section, the length of the tube (the length in the direction along the central axis of the tube) is 1500 mm, and the left and right width of the tube (the length of the rectangular cross section). The length of the side is 1240 mm, the vertical width of the tube (the length of the short side of the rectangular cross section) is 690 mm, and the thickness of the tube is 16 mm.

  As the collision preventing means 100, for example, a pipe line forming body is used. As the pipe line forming body, for example, a hollow tube 101 having an outer diameter of 75 mm × 75 mm and a wall thickness of 16 mm is used, and one outer surface 102 of the hollow tube 101 is used as the other outer surface of the tube 2. The hollow pipe 101 and the pipe 2 were fixed by a fixing means such as welding while being in contact with 2b, thereby forming a pipe line of the hollow pipe 101. For example, a hollow steel pipe is used as the hollow pipe 101.

The guide means 120 is constituted by a rail forming body, for example. For example, a long member 121 having an L-shaped cross section is used as the rail forming body. The long member 121 having the L-shaped cross section is configured such that one long side edge side and the other long side edge side of the long plate are located at the center position of one short side edge of the long plate and the center of the other short side edge. The long side edge side surface 122 and the other long side edge side surface 123 are configured to form a right angle by being bent in a direction approaching each other via a straight folding line connecting the positions. Then, the long member 121 and the tube 2 are fixed by a fixing means such as welding in a state where the one long side edge side surface 122 is brought into contact with the one outer surface 2a of the tube 2. The other long side surface 123 of the tube 2 and one outer surface 2a of the tube 2 are configured to form a right angle. The long member 121 is fixed to one outer surface 2 a of the tube 2 so as to extend in parallel with the center line of the tube 2.
The length of the long side edge side surfaces 122; 123 of the long member 121 in the short direction is the same as the outer diameter of the hollow tube 101 serving as a duct forming body, or the outer diameter of the hollow tube 101 is A dimension shorter than the diameter dimension is formed.

  As shown in FIG. 4; FIG. 5, the hollow tube 101 constituting the collision preventing means 100 and the long member 121 constituting the guide means 120 are, for example, the longitudinal direction of the outer surface 2a; That is, it is provided so as to extend over the entire length of the outer surface 2a; 2b of the tube 2 in the extending direction of the tube 2). That is, the hollow tube 101 constituting the collision preventing means 100 is provided at a certain interval from the long side edge 2g so as to extend along the long side edge 2g on the other outer surface 2b of the tube 2. Further, the long member 121 constituting the guide means 120 is provided at a certain distance from the long side edge 2f so as to extend along the long side edge 2f on one outer side surface 2a of the tube 2.

The guide member 120 is configured by providing the long members 121 one at a position close to both the upper and lower long side edges 2f; 2f on the one outer surface 2a of the tube 2.
Each long member 121 is, for example, the surface 123 on the other long side of each long member 121; the surfaces 123 facing each other with a constant interval H 1, and the surface on one long side of each long member 121. 122; 122 is extended to the long side edges 2f; 2f side of one outer side surface 2a of the tube 2 so that the long side surfaces 122; 122 are one outer side surface of the tube 2 so as to be separated from each other. It is fixed to 2a.

One hollow tube 101 is provided at a position close to both the upper and lower long side edges 2g; 2g on the other outer surface 2b of the tube 2, and the hollow tubes 101 are provided at regular intervals. Thus, the collision preventing means 100 is configured.
In each hollow tube 101, for example, the long side edge 2g of the other outer surface 2b of the tube 2 in each hollow tube 101; the outer surface 103 at a position close to 2g; 103 are opposed to each other with a constant interval H2. And the outer side surface 104; 104 located in the position close | similar to the center between the long side edge 2g and the long side edge 2g of the other outer side surface 2b of the pipe | tube 2 in each hollow tube 101 is spaced apart by the fixed space H3. One outer surface 102 is fixed to the other outer surface 2 b of the tube 2 so as to face each other.
Each hollow tube 101; 101 fixed to the other outer surface 2b of the tube 2 has a tube wall that penetrates the tube wall to form the outer surface 104; An inlet 105 with a check valve is provided in which a check valve for preventing inflow of an object from the outside of the hollow tube 101 to the inside of the hollow tube 101 is attached to a hole communicating with the inside and outside of the 101. In addition, a chemical solution or a cement-based injection material for water stop treatment, which will be described later, can be injected into the underground 10 from the inside of the hollow tube 101 through the injection port 105 with the check valve. .
In addition, the injection port 105 with a check valve is spaced apart along the extending direction of the hollow tube 101 provided in one tube 2 or in the hollow tube 101 provided in one tube 2. A plurality are provided apart.
In addition, the above-described inlet with the check valve is provided in each tube wall forming the long side edge 2g of the other outer surface 2b of the tube 2 in each hollow tube 101; the outer surface 103; 103 at a position close to 2g. Then, a back-up process in which a chemical solution or cement-based injection material is injected into the underground 10 around the outer periphery of the pipe 2 becomes possible.

The relationship between the distances H1; H2; H3 is H1>H2> H3. For example, H1 is equal to or less than the length between the long side edges 2f; 2f of one outer side surface 2a of the tube 2; Long side edge 2f; set to 2/3 or more of the length between 2f, and H3 is set to 1/3 or more of the long side edge 2g of the other outer surface 2b of the tube 2; Is done.
Specifically, H2 is set to be about several centimeters smaller than H1, and the long side edge 2g of the other outer surface 2b of the tube 2 in each hollow tube 101; By being configured to be able to contact the other long side surface 123; 123 of each long member 121, the propulsion direction of the next pipe 2 in the underground 10 is accurately determined by the collision preventing means 100 and the guide means 120. Will be guided by.

The collision preventing means 100 swings the rotary excavation body 46 using the pipe installation device 1 and moves the rotary excavation body 46 outside the pair of outer surfaces 2a; 2b of the pipe 2 in front of the pipe 2 ( Precisely, the rotary excavator 46 is installed in the ground 10 first when the rotary excavator 46 moves to the outside of the pipe 2 from the pair of outer surfaces 2a; Installed in the underground 10 so that it does not collide with one outer surface 2a of the pipe 2 that has been placed in the ground 10 side by side with the one outer surface 2a of the pipe 2 previously installed in the underground 10 It is the structure for setting a required space | interval between the other outer surface 2b of the following pipe 2 to be performed.
Therefore, one outer surface 2a of the pipe 2 previously installed in the underground 10 by the collision prevention means 100 and the other outer surface 2b of the pipe 2 installed in the underground 10 so as to be arranged next to the pipe 2 are arranged. The minimum dimension of the gap formed between them is the shortest distance between the outermost end of the rotary excavator 46 at the maximum swing and the outer surface 2a; Rotating excavation when the pipe 2 is installed in the underground 10 so that it is arranged next to the one outer surface 2a of the pipe 2 previously installed in the underground 10 by being set to a longer distance. A collision with the body 46 can be reliably prevented.

As shown in FIG. 3, the support 11 constructed in the underground 10 by the pipe installation device 1 and the pipe installation method of the first embodiment includes a pipe 2 positioned at the head (hereinafter referred to as a head pipe) and a plurality of subsequent ones. Tube 2 (hereinafter referred to as a subsequent tube). That is, the support work 11 is constructed by a leading pipe 6 that is a pipe 2 positioned at the leading end and a succeeding pipe 7 that is a plurality of succeeding pipes 2 provided so as to follow the leading pipe 6.
As the support work 11, a plurality of curved pipes are sequentially connected and installed in the underground 10, so that the support work 11 that bends and extends so as to draw an arc is constructed in the underground 10, or a plurality of straight pipes are provided. A support work 11 is constructed in the underground 10 that is connected in sequence and installed in the underground 10 to extend straight.
As the support work 11, the support work 11 constructed by continuously connecting a plurality of pipes 2 so as to straddle between one cavity portion and the other cavity portion outside the figure formed in the underground 10, Starting from an unillustrated cavity formed in 10, a support 11 constructed by continuously connecting a plurality of pipes 2 so as to return to the cavity, starting from an unillustrated cavity formed in the underground 10 Then, there is a support work 11 constructed so as to stop at the underground 10.

For example, as shown in FIG. 2A, a pipe 2 (a leading pipe 6 and a plurality of subsequent pipes 7) is installed in the underground 10 from a single cavity formed in the underground 10, and the first (first) The support structure 11A is constructed. Thereafter, the next pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) is placed in the ground 10 so as to be arranged next to the pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) forming the first support work 11A. Install and construct the second support 11B as shown in FIG. The dotted line in FIG. 2A indicates that the rotary excavator 46 is swung using the pipe installation device 1 so that the rotary excavator 46 is outside the pair of outer surfaces 2a; 2b of the pipe 2 in front of the pipe 2. The overexcavation range when moved to is shown.
When constructing the second support 11B, the cross section L-shaped that forms the guide means 120 provided on one outer surface 2a of the pipe 2 of the first support 11 already built in the ground 10 Collision prevention provided on the other outer surface 2b of the leading pipe 6 for constructing the second support 11 to be inserted into the ground 10 from one cavity portion between the long members 121; The leading tube 6 is positioned so that each hollow tube 101; 101 as the means 100 enters, and then the tube 2 is installed in the ground 10. Further, the internal space of the leading tube 6 and the succeeding tube 7 The subsequent pipe 7 is sequentially added to the leading pipe 6 so as to communicate with the internal space, and the internal space of each hollow tube 101; 101 and the internal space of each subsequent hollow tube 101; 101 are connected to each other. Behind each hollow tube 101; 101 so as to communicate Each hollow tube 101 of the connection; went shirttail 101 installed in the ground 10 in the same manner as described above, to build a second shoring 11B in the ground.
Similarly, as shown in FIG. 2C, the next pipe 2 (the leading pipe 6 and the leading pipe 6 and the plurality of succeeding pipes 7) is arranged next to the pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) that form the second support 11B. A plurality of succeeding pipes 7) are installed in the underground 10 to construct a third support 11C.
In the first embodiment, the pipe 2 that first forms the support work 11A constructed in the ground is provided with the guide means 120 on one outer side surface 2a of the pipe 2, but the other outer side surface 2b of the pipe 2 is provided. The one having a configuration not provided with the collision preventing means 100 was used.
In the first embodiment, by providing the collision prevention means 100 and the guide means 120, one support work 11 is configured between one support work 11 and the other support work 11 that are adjacent to each other in the underground 10. Injection region with high hermeticity surrounded by one outer surface 2a of each tube 2 and the other outer surface 2b of the other tube 2 constituting the other support 11 and each hollow tube 101; 150 is formed, and an injection material 200 (see FIG. 11) such as a chemical solution or a cement-based injection material is injected into the injection region 150 through the hollow tube 101 and the injection port 105 with a check valve provided in the hollow tube 101. By injecting, it becomes possible to form a water-stopping treatment part having high water-stopping performance between one support work 11 and the other support work 11.

An example of the pipe installation device 1 having the swingable excavating body 46 will be described.
As shown in FIG. 6, the pipe installation device 1 includes a pipe 2, an excavation device 3, and a control device 65. In the following, the upper side in FIG. 6 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 6 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.

As shown in FIG. 6, the excavation apparatus 3 includes an excavation machine 26, an excavation machine swing drive apparatus 25, a propulsion apparatus 70, a water supply apparatus 75, and a mud discharge apparatus 76.
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 on the inner side of the front pipe 6 on the front opening 6t side so that the center line of the cylinder of the cylindrical guide member 31 coincides with the center line of the pipe of the front pipe 6. The other pair of wall surfaces (where the rocking substrate 30 is opposed to the front pipe 6 in parallel with each other) and 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 front pipe 6 is maintained. For example, the guide member 31 is attached to the guide member 31 so as to be able to swing back and forth around the center between the left and right inner wall surfaces 6a; The watertightness between the inner peripheral surface 35 and the inner peripheral surface 35 is maintained. The rotary excavation body 46 of the excavating machine 26 having a plurality of excavation bits (excavation blades) 52 is positioned in front of the top opening 6t of the top pipe 6, and the column 42 that supports the rotary excavation body 46 is a rocking substrate. 30. When the ground excavation 99 in front of the top pipe 6 is excavated by the rotary excavator 46, the rocking substrate driving means 32 has a pair of side walls 30a; Is pressed and pulled back and moved back and forth, so that the rotation center line L of the rotary excavator 46 has a plane perpendicular to the propulsion direction of the leading pipe 6 and one pair of wall surfaces of the leading pipe 6 facing each other in parallel (for example, A first state parallel to the upper and lower inner wall surfaces 6c; 6d) of the top tube 6, and a direction parallel to the one pair of wall surfaces of the top tube 6 facing each other in parallel, and the propulsion direction of the top tube 6 Intersects an orthogonal plane in a state other than orthogonal It is set to the second state.
That is, the pipe installation device 1 includes the excavating machine rocking drive device 25 for rocking the rotary excavator 46 in the left-right direction of the top pipe 6 in front of the top pipe 6. When excavating 99 with the rotary excavator 46, the swing excavator 46 can be swung left and right by driving the swing substrate 30 by the swing substrate driving means 32, and the rotary excavator 46 can be swung horizontally. Compared with the case where it does not move, the lateral width that can be excavated can be increased. That is, prior to the advancement of the leading pipe 6, the left and right widths wider than the lateral width of the leading pipe 6 (the spacing between the pipes in the direction perpendicular to the other pair of wall surfaces of the leading pipe 6) in front of the leading pipe 6 Since the natural mountain 99 can be excavated at the width interval and the front pipe 6 can be dug in the left-right width direction in front of the top pipe 6, the top opening 6t of the top pipe 6 is grounded when the top pipe 6 is propelled. The possibility of colliding with the hard layer of the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.

The leading 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.
The guide member 31 is formed of a cylinder having a quadrangular cross section, and is installed on the inner side of the leading end side of the leading tube 6 so that the center line of the guiding member 31 and the center line of the leading tube 6 are the same. The 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 swing guide member 31 is formed to be approximately the same as the inner peripheral dimension of the cross section of the top tube 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 face the curved surfaces of the left and right side wall surfaces 35a; 35b of the guide member 31 in parallel. The left and right side wall surfaces 35a; 35b are formed on curved surfaces having the same curvature as the curved surfaces. For example, cylindrical protrusions 37 and 37 (see FIGS. 7 and 9) are provided at the center position between the left and right of the upper and lower end surfaces of the flat plate forming the oscillating 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 39h formed in the outer peripheral surface 39 so as to go 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 oscillating substrate 30 so that the watertight 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. 6; FIG. 8, the swinging 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 swinging substrate 30 back and forth. It is formed. As shown in FIG. 8, for example, the support holding through-hole 13 is formed so as to penetrate the central portion of the swing substrate 30, and the sludge drain holding through-hole 14 is provided on the left and right sides of the lower portion of the swing 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 swing substrate driving means 32 includes a swing substrate driving jack 16, a jack mounting table 17, and a jack reaction force receiving member 18.
The swing substrate driving jack 16 is constituted by, for example, a hydraulic jack.
Two oscillating substrate driving jacks 16 are provided, and one oscillating substrate driving jack 16 is disposed on each of the left and right sides of the oscillating substrate 30 at the rear.
In the left swing board driving jack 16A, the cylinder 16a is mounted on the jack mounting table 17 and fixed to the jack mounting table 17, and the rear end surface of the cylinder 16a is located on the left side of the front surface of the jack reaction force receiving member 18. A connecting means 22 such as a pin joint between the tip of the piston rod 16b and the rear surface 30x of the swinging substrate 30 so that the upper and lower central sides on the left end side of the rear surface 30x of the swinging substrate 30 are fixed and can be pulled back. Connected by.
In the right swing board driving jack 16B, the cylinder 16a is mounted on the jack mounting table 17 and fixed to the jack mounting table 17, and the rear end surface of the cylinder 16a is on the right side of the front surface of the jack reaction force receiving member 18. A connecting means 22 such as a pin joint between the tip end of the piston rod 16b and the rear surface 30x of the oscillating substrate 30 so that the upper and lower central sides on the right end side of the rear surface 30x of the oscillating substrate 30 can be pressed and pulled back. Connected by.

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 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 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.
In the first embodiment, as described above, the rotation center line L of the two rotary excavating bodies 46; 46 is parallel to the plane orthogonal to the propulsion direction of the leading pipe 6 and parallel to the upper and lower inner wall 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 can be increased, and further, the excavation can be performed in a quadrangular cross section. The pipe 2 can be easily installed in the underground 10.
Further, in the first embodiment, the excavating machine swing driving device 25 is operated, and as shown in FIG. 10, the rotation center line L of the two rotary excavating bodies 46; 46 is a surface orthogonal to the propulsion direction of the top pipe 6. When the natural ground 99 is excavated in a second state that intersects and is parallel to the upper and lower inner wall surfaces of the top pipe 6, the natural ground 99 has a width interval that is wider than the left and right width intervals of the top pipe 6 in front of the top pipe 6. Therefore, 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. .

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.
The propulsive force transmission component 64 is formed by combining, for example, H-section steel. For example, the front left upper / lower extension column 64a provided to extend up and down connected to the left end rear end surface of the guide member 31 and the right end rear end surface of the guide member 31 to extend vertically. The front left upper / lower extension post 64b, the rear left upper extension post 64c connected to the left end of the jack reaction force receiving member 18 and extended vertically, and the right end of the jack reaction receiving member 18 The rear right and left upper and lower extension pillars 64d connected to the upper and lower parts and the rear right and left upper and lower extension pillars 64a extending in the front and rear direction are connected to the rear and rear left and right upper and lower extension pillars. 64c is connected to the left connecting part 64e, and the right connecting part 64f is extended in the front-rear direction and the front end is connected to the front right upper and lower extension pillar part 64b and the rear end is connected to the rear right upper and lower extension pillar part 64d. With.

The propulsive force transmitting rod-like body 71 is a rod-shaped member whose length from one end to the other end is longer than the shortest distance between the rear end surface 64x of the propulsive force transmitting component 64 and the rear end surface 102e of the leading pipe 6. Is the body. 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. A pressing plate 61b is provided at the tip of the piston rod 61a of the hydraulic jack 61A. The cylinder 61c of the hydraulic jack 61 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 plate 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. 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. 6). 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 30x 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 of the tube extends while being inclined from the inner side surface 6a; 6b side of the leading tube 6 to the central side of the leading tube 6.

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 30x 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 so that the center line of the tube extends from the inner side surface 6a; 6b side of the leading tube 6 to the central side of the leading tube 6 while being inclined.

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.

  According to the pipe installation device 1 having the swingable rotary excavating body 46 described above, the excavating machine swinging drive device 25 is provided, so that the rotation center line L of the rotary excavating body 46 is perpendicular to the propulsion direction. Since the rotary excavator 46 can be swung to the left and right by tilting with respect to the plane perpendicular to the propulsion direction, the horizontal excavation width by the rotary excavator 46 is increased. Since the amount of surplus can be increased and the hard layer ahead of the leading pipe 6 can be excavated, the leading pipe 6 can be smoothly propelled in the underground 10 even when the natural ground 99 is hard ground.

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 rotary excavator 46 swings in the left-right direction of the top pipe 6 by operating the swing board drive jack 16 to swing the left and right walls 30a; 30b of the swing board 30 back and forth. Rocks and excavates 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 leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, the succeeding pipe 7 is connected to the rear end face 102e of the leading pipe 6 by welding or a fixture such as a bolt, By connecting the other end of the leading thrust transmission rod 71 and one end of the trailing thrust transmission rod 71 by bolts or welding, the following thrust is placed behind the leading thrust transmission rod 71. In addition to adding the transmission rod-like body 71, 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 sludge pipe (not shown) is added to the other end. 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 projecting rearward from the rear end edge of the succeeding pipe 7, and the abutting member 72 is disposed on the piston of the hydraulic jack 61A. By rotating and driving the rotary excavator 46; 46 while being pressed by the rod 61a, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe 7 is installed in the ground.
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, if the excavating machine 26 and the like are pulled back and collected into the cavity on the starting side that is the starting point of excavation, the propulsive force transmission rod-shaped body 71 is added, so that the excavating machine 26 And the like, the propulsive force transmission rod-shaped body 71 is pulled back into the cavity by one length from the rearmost propulsive force transmission rod-shaped body 71 side, and the propulsive force transmission rod-shaped in order from the last tail side to the top By removing the body 71, the excavating machine 26 and the like can be easily collected. In this case, the hydraulic jack 61A, which is an example of the propulsion device, needs to be installed only in the cavity that is the starting point of excavation, so that the device cost can be reduced.
Note that the excavating machine 26 and the like may be pushed into the cavity on the reaching side and recovered.
For example, after the top pipe 6 is pushed out into the cavity on the reaching side and the propulsion receiving part 63 is removed, the excavating machine 26 and the like are pushed into the cavity on the reaching side and collected. In this case, the operation of pushing the excavating machine 26 and the like into the cavity on the reaching side is easier than the operation of pulling the excavating machine 26 and the like into the cavity that is the starting point of excavation. It becomes.
When the supporting work 11 is constructed so as to start from one cavity portion formed in the ground 10 and return to the cavity portion, the excavating machine 26 or the like is excavated if the excavating machine 26 reaches the arrival port of one cavity portion. If the machine 26 and the like are recovered by being pushed out from the arrival port into the cavity, the excavating machine 26 and the like can be easily recovered, and the hydraulic jack 61A only needs to be installed in the one cavity, so that the apparatus cost is reduced. Can also be reduced.
In addition, the support 11 with which the intensity | strength of the pipe | tube 2 was raised is constructed | assembled by filling the concrete 300 in the pipe | tube 2 of the support work 11 as needed, or arrange | positioning a reinforcing bar and filling the concrete 300 ( FIG. 11).

As shown in FIG. 1, the pipes 2 of the support work 11 (the leading pipe 6 and the plurality of succeeding pipes 7) constructed by the leading pipe 6 and the plurality of succeeding pipes 7 previously installed in the ground 10 are arranged side by side. As described above, when the support pipe 11 is constructed by installing the next pipe 2 (the leading pipe 6 and the plurality of succeeding pipes 7) in the underground 10, the pipe 2 of the support 11 constructed in the underground 10 first. Let's install in the underground 10 between the surface 123 and the surface 123 on the other long side of each of the long members 121; 121 having the L-shaped cross section forming the guide means 120 provided on one outer surface 2a. The next tube 2 is grounded so that each hollow tube 101; 101 as the collision preventing means 100 provided on the other outer surface 2b of the next tube 2 (the leading tube 6 and the plurality of subsequent tubes 7) enters. Installed in the middle 10 to construct the support work 11.
In the case of the propulsion method in which the pipe 2 is sequentially added backward while excavating and propelling the underground 10 with the excavating machine 26 as in the present invention, protrusions such as the collision preventing means 100 and the guide means 120 are provided on the outer surface of the pipe 2. However, in the present invention, the collision prevention means provided on the outer surface 2a; 2b of the pipe 2 installed in the ground by the pipe installation device 1 is not preferable. 100 and the guide means 120 are dug by the rotary excavating body 46 in which the underground 10 in the propulsion direction is swung, so that the collision prevention means 100 and the guide means 120 are provided on the outer surface 2a; 2b of the pipe 2. However, there is almost no resistance during propulsion.

Since the collision preventing means 100 and the guide means 120 are used, the next pipe 2 is placed under the ground 10 so as to be arranged next to the pipe 2 of the one supporting work 11 that has been previously installed and constructed in the ground 10. When the other support work 11 is constructed by installing the one support work 11 between the one support work 11 and the other support work 11, one outer surface 2a of each of the pipes 2 constituting the one support work 11 It becomes possible to form an injection region 150 having a high hermeticity surrounded by the other outer surface 2b of the other tube 2 constituting the other support work 11 and the hollow tubes 101; 101. Therefore, as shown in FIG. 11, by injecting an injection material 200 for water stop treatment into the injection region 150 through the hollow tube 101 and the injection port 105 with a check valve, one support is provided. It becomes possible to form a water stop processing part with high water stop performance between the work 11 and the other support work 11.
In this case, the injection region 150 has a high hermeticity and a region with many excavated voids, so that the injection material 200 is filled in the voids and the injection material injected into the injection region 150 is injected. The possibility of flowing out of the region 150 is reduced. Accordingly, the water stop treatment can be reliably performed, the injection amount of the injection material can be reduced, and the construction cost can be reduced.
The injection process is performed by, for example, sealing the hollow space of the hollow tube 101 in the vicinity of the injection port communicating with the injection port 105 with a check valve using an injection device called a packer (not shown) and injecting into the sealed space. The material 200 may be supplied.

According to the first embodiment, in the method of installing the pipe 2 in the underground 10 using the pipe installation device 1 having the swingable excavating body 46, the pipes 2 previously installed in the underground 10 are mutually connected. The other outer surface 2b of the next pipe 2 installed in the underground 10 so as to be arranged next to one outer surface 2a of the pair of opposing outer surfaces 2a; 2b (that is, previously installed in the underground 10) The rotary excavator 46 positioned in front of the top opening of the next pipe 2 installed in the ground 10 is swung on the outer surface 2b) which is located beside the one outer surface 2a and opposed to each other. When the rotary excavator 46 moves to the outside of the pair of outer side surfaces 2a; 2b of the pipe 2, the outer side 2a of the pipe 2 in which the rotary excavator 46 is first installed in the ground 10 is used. The collision prevention means 100 for preventing the collision with the The one outer surface 2a of the pipe 2 is provided on the other outer surface 2a of the pipe 2 installed in the underground 10 so as to be arranged next to the tube 2 previously installed in the underground 10. Guide means 120 is provided to guide the collision preventing means 100 and guide the traveling direction of the next pipe 2 in the ground 10.
Therefore, according to the first embodiment, the rotary excavation body 46 when the pipe 2 is installed in the underground 10 so as to be aligned with the one outer surface 2 a of the pipe 2 previously installed in the underground 10 and the side of the pipe 2. Can be reliably prevented, and the propulsion direction of the pipe 2 to be installed in the underground 10 in the underground 10 is accurately guided by the collision preventing means 100 and the guide means 120, so that the adjacent supporters 11 can be connected to each other. It will not slip.
In particular, the collision preventing means 100 is composed of a pair of hollow tubes 101; 101 as a pair of protrusions provided on the other outer surface 2a of the tube 2, so that the pair of hollow tubes 101; Between one outer surface 2a of the pipe 2 installed in the underground 10 and the other outer surface 2b of the next pipe 2 installed in the underground 10 so as to be arranged next to the one outer surface 2a. A rotary excavator 46 can be set when the pipe 2 is installed in the underground 10 so that a necessary interval X can be set and the one outer surface 2a of the pipe 2 previously installed in the underground 10 and the pipe 2 are arranged side by side. Can be reliably prevented, and the next tube 2 is difficult to rotate around the center line of the next tube 2 when the next tube 2 is installed in the ground 10. It becomes possible to install accurately at the 10 planned installation positions. In particular, when a pair of hollow tubes 101; 101 as a pair of protrusions provided on the other outer surface 2a of the tube 2 are provided at intervals, the next tube 2 is installed in the ground 10 The next tube 2 is more difficult to rotate with the center line of the next tube 2 as the rotation center, and the next tube 2 can be accurately installed according to the planned installation position of the underground 10.
Further, the collision preventing means 100 is provided on one of the outer surfaces 2a of the pair of outer surfaces facing each other of the tube 2 previously installed in the underground 10 or the tube 2 previously installed in the underground 10. As the guide means 120 provided on one outer surface of the outer surfaces 2b of the next pipe 2 installed in the underground 10 so as to be aligned with one outer surface 2a of the pair of outer surfaces facing each other. Since it is constituted by the long member 121 and the hollow tube 101 as a protrusion provided on the other outer surface and guided by the long member 121, the underground 10 of the tube 2 to be installed in the underground 10 The propulsion direction is accurately guided by the hollow tube 101 and the long member 121 as protrusions, and the adjacent support members 11 do not deviate from each other.
Further, a long member 121; 121 as a pair of guide means 120; 120 is provided on the one outer surface, and the hollow tube 101; 101 as a protrusion is positioned between the pair of long members 121; 121. So that the direction of propulsion in the underground 10 of the tube 2 to be installed in the underground 10 is determined by the pair of long members 121; 121 and the hollow tube 101 as a protrusion. It is guided more accurately, and the effect of preventing deviation between adjacent support works 11 is improved. In particular, since the pair of long members 121; 121 contacts the outer surface 103; 103 of each hollow tube 101; 101 and guides each hollow tube 101; 101 so as to sandwich each hollow tube 101; When the next pipe 2 is installed in the underground 10, the traveling direction of the next pipe 2 can be guided more accurately.
Further, according to the first embodiment, the hollow tube 101 having the injection port 105 with the check valve is used as the collision preventing unit 100 and the guide unit 120 is provided, so that one of the adjacent ones in the underground 10 is provided. Between the support work 11 and the other support work 11, one outer surface 2 a of each of the pipes 2 constituting one support work 11 and the other outside of the other pipe 2 constituting the other support work 11. A highly sealed injection region 150 surrounded by the side surface 2b and each hollow tube 101; 101 can be formed, and the hollow tube 101 is formed through the hollow space of the hollow tube 101 and the injection port 105 with a check valve. The injection material 200 can be injected into the injection region 150 from the inside, and a water-stopping treatment section with high water-stopping performance can be formed between one support work 11 and the other support work 11. Moreover, since the possibility that the injection material 200 injected into the injection region 150 flows out of the injection region 150 is reduced, the injection amount of the injection material 200 can be reduced, and the construction cost can be reduced.
Further, since the hollow tube 101 having the inlet 105 with the check valve is used as the collision preventing means 100, as will be described later, even after the concrete 300 is buried in the tube 2, The injection material 200 can be injected into the injection region 150 from the inside of the hollow tube 101 through the hollow space and the injection port 105 with a check valve.

Embodiment 2
The collision prevention means 100 swings the rotary excavation body 46 using the pipe installation device 1, and the rotary excavation body 46 moves outside the pair of outer side surfaces 2 a and 2 b of the pipe 2 in front of the pipe 2. In order to prevent the rotary excavator 46 from colliding with one outer surface 2a of the pipe 2 previously installed in the ground, the one outer surface 2a of the pipe 2 previously installed in the underground 10 and the next underground 10 is a means for setting the necessary distance X between the pipe 2 and the other outer surface 2b of the pipe 2 installed in the pipe 10, so that it is not always necessary to use the hollow pipe 101 as the collision prevention means 100. It is provided so as to protrude from the other outer surface 2 b of the tube 2, and when the next tube 2 is installed in the underground 10, it comes into contact with one outer surface 2 a of the tube 2 previously installed in the underground 10. Any structure that maintains the necessary interval X may be used.
Even in the case of the second embodiment, between one support work 11 and the other support work 11, one outer surface 2 a of each pipe 2 constituting the one support work 11 and the other support work 11 are configured. Therefore, it is possible to form an injection region having a high hermeticity surrounded by the other outer surface 2b of the other tube 2 and the projections outside the figure constituting the collision preventing means 100. In this case, by injecting an injection material into the injection region through an injection port with a check valve (not shown) attached to a hole penetrating the other outer surface 2b of the next pipe 2, It becomes possible to form a water-stopping treatment part having high water-stopping performance between the support work 11 and the other support work 11. After forming the water-stopping treatment section, the pipe 2 is filled with the concrete 300 as shown in FIG. What is necessary is just to build the support work 11 which raised the.

In the case where there is no reaching-side cavity that allows the pipe 2 to reach, after the support 11 is constructed, the excavating machine 26 and the like are withdrawn into the starting-side cavity that is the starting point for excavation and collected. In order to prevent groundwater from flowing into the pipe 2 of the supporting work 11 and causing ground subsidence, it is necessary to bury the concrete 300 in the pipe 2 when the excavating machine 26 is pulled back and collected. In this case, since the inside of the pipe 2 is buried with the concrete 300, when the hollow pipe 101 is not used as in the second embodiment, between the one support work 11 and the other support work 11 from the inside of the pipe 2. The injection material cannot be injected from the inside of the tube 2 into the injection region.
On the other hand, when the hollow tube 101 that can be used as the injection tube is used as the collision preventing means 100 as in the first embodiment, the concrete 300 is buried in the tube 2 as described above. However, it is possible to inject a chemical solution or a cement-based injection material into the injection region using the hollow tube 101 as an injection tube.
Therefore, as described above, when there is no cavity on the arrival side of the pipe 2 and when it is necessary to bury the concrete in the pipe 2 when the excavating machine 26 is pulled back and collected, as in the first embodiment, It is effective to install the tube 2 by a method using the hollow tube 101.

Embodiment 3
The collision prevention means 100 is provided on one outer surface of a pair of outer surfaces facing each other of the pipe 2 previously installed in the underground 10, and the underground is arranged next to one outer surface of the pipe 2. Alternatively, the guide means 120 may be provided on the other outer surface of the next pipe 2 installed at 10.

Embodiment 4
Further, the guide means 120 may be omitted. That is, you may use the pipe | tube of the structure provided with only the collision prevention means 100 in one outer surface of a pair of outer surfaces which the pipe | tube 2 mutually opposes.

Embodiment 5
The excavation radius by the excavation bit as an excavation blade provided so as to protrude from the outer peripheral surface 51 of the rotating body 50 is based on the dimension between a pair of inner wall surfaces of the leading pipe 6 (for example, between the upper and lower inner wall surfaces of the leading pipe 6). And a pair of wall surfaces of the front pipe 6 in front of the front pipe 6 using a rotary excavation body (not shown) configured to be able to pass through the inner space of the front pipe 6 at the time of recovery. A pipe configured to be able to excavate the underground 10 at a width interval wider than the width interval of the leading pipe 6 (for example, the vertical width interval of the leading pipe 6) that is orthogonal to the upper and lower inner wall surfaces 6c; 6d. An installation device may be used.
If the pipe installation device provided with the rotary excavator of the fifth embodiment and the excavating machine swing drive device 25 of the first embodiment is used, the underground 10 in front of the top pipe 6 is underground in the top, bottom, left and right sides. Since 10 additional moats are possible, it is possible to prevent a situation in which the leading opening edge of the leading pipe 6 collides with the hard ground and the leading pipe 6 cannot be pushed, and even if the ground is a hard ground, The pipe 2 can be promoted more smoothly in the underground 10.

  The guide means 120 may be a simple plate material, or a rail forming body having a concave or convex cross section, and the collision preventing means 100 may be provided with a protrusion that engages with the rail forming body.

In addition, the subsequent pipe is not connected to the rear end of the pipe to be put into the underground 10 first, and only the pipe to be put into the ground first from the hollow portion formed in the ground is installed in the underground 10 to the front. You may make it form the support work only by the pipe | tube put into the ground (namely, one pipe | tube). For example, a single pipe 2 may be used to form a pipe straddling one cavity and the other cavity.
Further, 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 described in 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 widened portions in the track, the above-described communication paths, and the like.

1 pipe installation device, 2 pipe, 2a One outer surface of the pipe, 2b The other outer surface of the pipe,
6 head pipe (pipe), 6t head opening, 7 follower pipe (pipe),
10 underground, 25 excavating machine swing drive device, 46 rotating excavator, 100 collision prevention means,
101 hollow tube (protrusion), 105 inlet with check valve, 120 guide means.

Claims (1)

When installing a pipe with a square cross section in the ground, a rotating excavator that rotates around a rotation center line parallel to the plane perpendicular to the propulsion direction of the pipe is installed in front of the top opening of the pipe. A pipe installation device for propelling a pipe and placing it in the ground by excavating the ground with a rotary excavator and moving the rotation center lines of the rotary excavator parallel to each other in parallel with each other The rotary excavator is set to a state that is parallel to the pair of outer surfaces and intersects with the surface perpendicular to the propulsion direction of the pipe in a state other than perpendicular to the outer side of the other pair of outer surfaces of the pipe facing each other in parallel. In the pipe installation method using the pipe installation device provided with the excavating machine swing drive device that can be moved to
After installing a pipe in the ground, when installing the next pipe in the ground so that it is aligned with the previous pipe installed in the ground, a pair of pipes installed in the ground that face each other The guide means is provided on one outer surface of the outer surfaces, and is installed in the ground so as to be aligned with one outer surface of a pair of outer surfaces facing each other of the tube previously installed in the ground. When the rotary excavation body located in front of the next opening of the next pipe swings on the outer side surface of the next pipe and moves outside the pair of outer side faces of the next pipe, the rotary excavation body Providing collision prevention means for preventing collision with one outer surface of the previous pipe already installed in the ground,
The guide means is a tube in which one long edge side surface of a long member having an L-shaped cross section in which one long edge side surface and the other long edge side surface form a right angle is first installed in the ground. Is fixed to one outer surface of the other, and the other long side surface and one outer surface of the tube are perpendicular to each other,
The anti-collision means is provided with one outer surface fixed to the outer surface of the next tube and a guide extending from the end of the one outer surface so as to be perpendicular to the outer surface of the next tube. And the other outer surface capable of surface contact with the surface on the other long edge side of the means,
The protruding length of the surface on the other long edge side protruding from one outer surface of the tube in the guide means is set shorter than the protruding length of the other outer surface protruding from the outer surface of the next tube in the collision preventing means. ,
The minimum dimension of the gap formed between one outer surface of the tube previously installed in the ground by the collision prevention means and the outer surface of the next tube installed in the ground so as to be arranged next to the tube is The pipe installation is characterized in that it is set to be longer than the shortest distance between the outermost end of the rotary excavator at the maximum swing and the outer surface of the rotary excavator in the direction of swing of the rotary excavator and the same virtual plane. Way .

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