JP6392546B2 - Pipe installation method and pipe with guide member used in the method - Google Patents

Description

  The present invention relates to a method of installing a pipe in the ground so as to line up with an installed pipe already installed in the ground.

  When installing a pipe in the ground so that it is aligned with the installed pipe by advancing the pipe in the extension direction of the installed pipe along the outer surface of the installed pipe already installed in the ground, Using a plate with a plate (plate material) as a guide member on the outer surface, slide the plate on the outer surface of the installed tube as the tube progresses, and the plate moves the outer surface of the tube and the outer surface of the installed tube. It is known to install a pipe so as to straddle (see, for example, Patent Document 1).

JP 2011-111728 A

However, since the pipe installation method described above uses a pipe provided with a plate as a guide member extending over the entire length of the pipe, the ground and guide member when the pipe travels in the ground are used. The frictional resistance increases and the propulsion reaction force increases when propelling the pipe. Further, when the guide surface constituted by the outer surface of the installed pipe installed in the ground is deformed by receiving the pressure of the ground, the plate as the guide member extending over the entire length of the pipe is provided. When the provided pipe is used, it becomes difficult for the guide member (plate) to move on the deformed guide surface of the installed pipe, and it becomes difficult to advance the pipe with the guide member. Further, when the pipe with the guide member stops moving due to the ground condition, and the pipe provided with the plate as the guide member extending over the entire length of the pipe is used, the tip of the pipe with the guide member is used. It becomes difficult to shake the side, and it becomes difficult to advance the tube with the guide member.
The present invention can reduce the frictional resistance between the ground and the guide member when the pipe travels in the ground, and can reduce the propulsion reaction force when propelling the pipe, and is installed in the ground. Even when the guide surface constituted by the outer surface of the installed pipe is deformed by the pressure of the ground, the guide member can be easily moved on the deformed guide surface of the installed pipe, and the guide member-equipped pipe In addition, even if the tube with a guide member stops moving due to the ground conditions, the tip side of the tube with a guide member can be easily shaken, and the guide member is attached. Provided is a pipe installation method and the like that can easily advance the pipe.

In the pipe installation method according to the present invention, the pipe is grounded so as to line up with the installed pipe by advancing the pipe in the extending direction of the installed pipe along the outer surface of the installed pipe already installed in the ground. a method of installing the tube to be installed in, as the tube, and the tube body, previously provided only one open side of which is the side to penetrate into the ground tube one end of the pipe body of the pipe body outer surface And a guide member provided with a guide member provided so that the other end side extends in a direction away from the center line of the tube of the tube body and protrudes to the outside of the tube body, and a spacer is used. When the pipe with the guide member is installed in the ground by proceeding in the extending direction of the installed pipe along the outer surface of the installed pipe from the one end opening side of the pipe of the pipe body, the outer surface of the installed pipe is A guide surface for guiding the other end of the guide member of the tube with the guide member. In the installation method of the tube using the tube body is constituted by a rectangular cross section tube, the guide member, by a rectangular flat plate in which one long side end surface of the four end faces of a rectangular flat plate is formed on the inclined surface The one short side of one of the plate surfaces of the guide member is connected to the outer surface of the one end opening side of the tube that is the side entering the ground into the tip of the tube main body, and is connected to the one end opening of the tube main body. One of the long side end surfaces on the near side is formed on an inclined surface inclined from the outer surface of the tube body toward the one end opening side of the tube body so as to be separated from the outer surface of the tube body, and the inclined surface and the other plate surface And a spacer is provided so as to protrude from the outer surface adjacent to the outer surface to which the guide member of the pipe body is attached, and the installed functioning as the guide surface. Outside next to the outer surface of the tube And has a surface contact, the surface is so formed on the projecting curved surface or arcuate surface in contact with the outer surface of the installation already tube, a ground and a guide member when the guide member with pipe progresses underground The frictional resistance of the guide member can be reduced, the propulsion reaction force can be reduced when propelling the tube, and the cost of the guide member can be reduced. Further, even when the guide surface constituted by the outer surface of the installed pipe installed in the ground is deformed due to the pressure of the ground, the guide member can easily move on the deformed guide surface of the installed pipe. As a result, it becomes possible to easily advance the tube with the guide member, and even if the tube with the guide member does not advance due to the ground condition, the tip side of the tube with the guide member can be easily shaken. Thus, the guide member-equipped tube can be easily advanced . Moreover, since the spacer is provided, it is possible to suppress the shift in the horizontal direction of the pipe when the pipe with the guide member and the subsequent pipe connected to the pipe with the guide member are advanced into the ground. It can be installed accurately at the planned position.
Also, the pipe body of the guide member with pipe is formed of a rectangular cross section of the outer surface trapezoidal tube is one of a pair of outer surfaces in parallel to oppose to each other are formed in a trapezoidal congruent tubes, before Symbol installation already tube, A plurality of the outer surface trapezoidal pipes are connected back and forth, and are configured by a bent pipe having a concave guide surface formed by a plurality of planes that are bent at the connecting portions of the front and rear outer surface trapezoidal pipes, When installing in the ground, one plate surface on the other end side of the guide member is guided by the concave guide surface of the bent tube, so that the tube with the guide member is extended in the direction of extension of the bent tube Since the cutting edge of the guide member is at a position away from the outer surface of the tube body, the cutting edge of the guide member is less likely to collide with the guide surface of the front surface of the trapezoidal tube on the front side. Sediment enters between the concave surface and the inclined surface of the guide member. By the guide member is pressed in a direction away from the concave crowded, the cutting edge of the guide member further less likely to collide with the guide surface of the plane of the front of the outer surface trapezoidal tube. Therefore, the guide member can easily move from the guide surface of the flat surface of the rear external trapezoidal tube constituting the bent tube to the guide surface of the flat surface of the external trapezoidal tube on the front side, and the guide member-equipped tube is smoothly pushed into the ground. Can be made.
Also, the pipe body of the guide member with pipe is formed by a curved pipe center line portion of the outer surface in the curve section a rectangular formed on the concave surface extending along the center line of the tube of the tube, before Symbol The installed pipe is constituted by a curved pipe having a concave guide surface that is continuous in the front-rear direction by connecting a plurality of the curved pipes in the front-rear direction, and when the pipe with the guide member is installed in the ground, the guide Since one plate surface on the other end side of the member is guided by the concave guide surface of the curved pipe, the cutting edge of the guide member is located away from the outer surface of the pipe body, so that the cutting edge of the guide member is It becomes difficult to collide with the concave guide surface of the curved pipe, and earth and sand enter between the concave surface of the curved pipe and the inclined surface of the guide member, and the guide member is pressed away from the concave surface. The cutting edge is less likely to collide with the concave guide surface of the curved pipe That. Therefore, the guide member can move smoothly on the concave surface of the curved pipe, and the pipe with the guide member can be smoothly pushed into the ground.
Also, the guide member with tube according to the present invention, the fixed and the tube body, the outer surface of the tube body of the previously provided only at one open side which is the side to penetrate into the ground one end the tube body of the tube A guide member provided so that the other end extends in a direction away from the center line of the tube of the tube body and protrudes to the outside of the tube body, and a spacer, and the tube body is formed by a tube having a rectangular cross section. The guide member is constituted by a rectangular flat plate in which one of the four end surfaces of the rectangular flat plate has a long side end surface formed on an inclined surface, and one short side of the one plate surface of the guide member; The outer surface of one end opening side of the tube, which is the side that penetrates into the ground, is connected to the tip of the tube main body, and one long side end surface of the tube body close to the one end opening is connected to the tube main body from the outer surface of the tube main body. The one end of the tube away from the outer surface of the tube body The blade edge of the blade is formed by the boundary between the inclined surface and the other plate surface, and the spacer is formed from the outer surface adjacent to the outer surface to which the guide member of the pipe body is attached. A protruding curved surface or arc that is provided to protrude and has a surface that contacts the outer surface adjacent to the outer surface of the installed tube that functions as the guide surface, and the surface contacts the outer surface of the installed tube Since it was formed in the surface, it can be used as a pipe with a guide member for realizing the pipe installation method of the present invention .

The figure which shows the procedure of the installation method of a pipe | tube (Embodiment 1). The perspective view which shows the procedure of the installation method of a pipe | tube (Embodiment 1). A side view showing the relation between an installed pipe and a pipe with a guide member (embodiment 1). The perspective view which shows an outer surface trapezoid pipe (Embodiment 1). The figure which shows the relationship between the guide surface of a bending pipe, and a blade edge | tip (Embodiment 1). The perspective view which shows the pipe | tube with a guide member (Embodiment 2). Sectional drawing of a pipe installation apparatus (embodiment 3). The perspective view which showed the head part of the top pipe (embodiment 3). The figure which looked at the excavation machine inside a pipe | tube from the blade-tip side of a guide blade pipe | tube (Embodiment 3). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 3). A perspective view showing a pipe installation device (embodiment 3). An exploded perspective view showing a pipe installation device (embodiment 3). Sectional drawing which shows the pipe installation apparatus provided with the excavation machine rocking | fluctuation drive device (Embodiment 8). (A) is the perspective view which showed the head part of the head pipe, (b) Sectional drawing which shows the relationship between a pair of 2nd excavation bit groups (Embodiment 9). (A) is a figure which shows the state at the time of excavation of a rotary excavation body, (b) is a figure which shows the attitude | position state at the time of collection | recovery of a rotary excavation body (Embodiment 9).

Embodiment 1
In the pipe installation method according to the first embodiment, as shown in FIG. 1; FIG. 2, the extension direction of the installed pipe along the outer surface of the previously installed pipe B1 or the installed pipe B2 that has already been installed in the underground 10 The pipe A1 with a guide member is used as the pipe when the pipe is installed in the ground 10 by using a pipe installation device to be described later so that the pipe advances along the installed pipe.

The pipe A1 with a guide member includes a pipe body A2 and a guide member A3.
The guide member A3 is provided only on the one end opening A21 side of the tube of the tube main body A2, which is the side that first enters the underground 10. The guide member A3 is provided such that one end A31 side is fixed to the outer surface A22 of the tube main body A2, and the other end A32 side extends in a direction away from the center line A2C of the tube of the tube main body A2 and protrudes outside the tube main body A2. It is done.

The installed pipe B1 first installed in the underground 10 is composed of a plurality of pipes A20. That is, using a pipe installation device, which will be described later, installed at the departure base, first, the pipe A20 that is the head of the installed pipe B1 is inserted into the ground 10, and the pipe A20 that sequentially follows the rear side of the pipe A20. Are connected by connecting means such as welding and inserted into the underground 10 so that the rear end portion and the front end portion are connected to each other by connecting means such as welding so as to be continuous in the front and rear in the traveling direction of these pipes. The first installed pipe B1 constituted by a plurality of pipes A20; A20; A20.
The installed pipe B2 installed in the underground 10 after the installed pipe B1 installed in the underground 10 for the first time is the first pipe A1 with a guide member that becomes the head of the installed pipe B2 in the underground 10 The tube A19 that is successively inserted on the rear side of the tube A1 with guide member is connected and inserted into the underground 10 so that the rear end portion and the front end are continuous in the front-rear direction in the traveling direction of these tubes. Is constructed in the ground 10 so that the succeeding installed pipe B2 constituted by a plurality of pipes A1; A19; A19... Connected to each other by connecting means such as welding is aligned with the preceding installed pipe B1. The
Note that the leading end side (one end opening side) of the pipe A20 that is the head of the first installed pipe B1 and the guide member-attached pipe A1 that is the top of the installed pipe B2 is a guide blade that will be described in a pipe installation device described later. It is the structure provided with the part.

For example, when four pipes are connected to form the installed pipe B2, first, in addition to the guide member A3 provided on the leading side (one end opening A21 side) of the pipe body A2 of the leading guide member-equipped pipe A1. After placing the end A32 side first on the outer surface A22 (guide surface B3) on the rear end side of the installed pipe B1 installed in the underground 10 (FIG. 2 (a); FIG. 2 (b), FIG. (See (a)), the pipe A1 with a guide member is pushed into the underground 10 from the starting base using the pipe installation device. The tube A1 with guide member is pushed into the ground 10 until only the rear end portion of the tube A1 with guide member remains at the starting base, and then the front end portion of the subsequent tube A19 is welded to the rear end portion of the tube A1 with guide member. (Refer to FIG. 1 (b)), and the tube A1 with the guide member and the subsequent tube A19 are brought together by pushing the subsequent tube A19 into the ground 10 using a tube installation device. It is pushed in and proceeds in the underground 10 (see FIG. 1B; see FIG. 1C). And by repeating the operation | work which pushes the several pipe | tube connected by connecting the following succeeding pipe | tube A19 to the succeeding pipe | tube A19 in the underground 10 with a pipe installation apparatus (FIG.1 (c)-(e). )), An installed pipe B2 installed in the underground 10 so as to line up with the preceding installed pipe B1 can be constructed (see FIG. 1 (e)). Thereafter, similarly, new installed pipes B2 are successively constructed so as to line up with the preceding installed pipes B2 already installed in the underground 10. Then, by filling concrete inside the installed pipes B1; B2; B2,..., A structure such as an invert is constructed.
That is, the pipe A1 with the guide member is installed in the underground 10 by proceeding from the one end opening A21 side of the pipe of the pipe body A2 along the installed pipe B1 or the outer surface A22 of the installed pipe B2 in the extending direction of the installed pipe. In doing so, the outer surface A22 of the installed pipe is used as a guide face B3 for guiding the other end A32 side of the guide member A3 of the pipe A1 with guide member.

The pipe A20 constituting the installed pipe B1 is, for example, a pipe center line (a line obtained by continuously connecting the center points of cross sections perpendicular to the pipe extension direction along the pipe extension direction). The cross section which is orthogonal is a straight tube whose center line is a straight line, and the center line of the tube is a straight tube or a curved tube whose center line is a curve.
The straight pipe has an outer trapezoidal tube C1 having a configuration in which a pair of outer surfaces facing each other in parallel with each other are formed into a congruent trapezoid, and the other pair of outer surfaces facing each other in parallel with each other are formed into a rectangle. 4), or four outer surfaces in which one pair of outer surfaces facing each other parallel to the tube are formed in a congruent rectangle and the other pair of outer surfaces facing each other parallel to the tube are formed in a congruent rectangle Are all rectangular tubes outside the figure.
The curved pipe has a configuration in which one pair of outer surfaces facing each other in parallel with each other are formed into a congruent curved rectangle, and the other pair of outer surfaces facing each other in parallel with each other are formed into a congruent curved surface rectangle. This is an outer curved rectangular tube outside the figure.
In the present invention, “rectangle” includes “square”.

Further, the pipe main body A2 of the pipe A1 with guide member and the pipe A19 connected to the pipe main body A2 and constituting the installed pipe B2 are pipes each having the spacer AS on one outer surface A24 of the pipe A20 described above. is there. The outer surface A24 is a surface facing the outer surface of the installed pipe B1 or the installed pipe B2 when the pipe main body A2 and the pipe A19 are installed. The spacer AS is a pipe with a guide member using a pipe installation device (see Embodiment 8, FIG. 13) having a configuration in which a rotary excavation body 46, which will be described later, can swing left and right in the underground traveling direction of the pipe A1 with a guide member. When the A1 and the pipe A19 are installed in the ground 10, the rotary excavator 46 and the installed pipe B1 which are positioned in front of the pipe A1 with the guide member and swing to the left and right in the underground traveling direction of the pipe A1 with the guide member In order to prevent contact with the outer surface of the installed pipe B2, the minimum necessary distance between the outer surface A24 of the pipe A1 and the pipe A19 with the guide member and the outer surface of the installed pipe B1 or the installed pipe B2 is maintained. It is a configuration. By providing the spacer AS, it is possible to suppress the deviation in the horizontal direction of the pipe when the pipe main body A2 and the pipe A19 advance to the underground 10, and the installed pipe B2 can be accurately constructed at a predetermined position.
That is, as the pipe body A2 and the pipe A19 of the pipe A1 with a guide member, the pipe A1 provided with the spacer AS protruding from the outer surface A24 on the outer surface A24 facing the outer surface of the installed pipe B1 or the installed pipe B2, Rotating excavator 46 described later is configured to swing guide pipe A1 and pipe A19 forward and backward in the underground traveling direction of pipe A1 with guide member and swing left and right in the underground traveling direction of pipe A1 with guide member. Is installed in the underground 10 using the pipe installation device provided with the spacer A to prevent contact between the outer surface A24 of the pipe A1 and the pipe A19 with the guide member and the outer surface of the installed pipe B1 or the installed pipe B2. Since the pipe A1 with the guide member and the succeeding pipe connected to the pipe A1 with the guide member are advanced to the underground 10, the deviation in the horizontal direction of the pipe can be suppressed, and the guide member is provided. Subsequent pipe connected to A1 and the guide member with pipe A1 becomes possible accurately placed in the position of the event.
In this case, an interval of at least the spacer AS occurs between the installed pipe installed in the ground so as to be lined up with each other, but the installed pipe is filled from the rear end opening of the installed pipe. Since concrete wraps around the gap from the opening of the end of the installed pipe and fills the gap, a continuous concrete structure can be constructed.
Further, the friction resistance between the spacer AS and the outer surface of the installed tube B1 and the outer surface of the installed tube B2 becomes as small as possible when the guide member-attached tube A1 and the subsequent tube connected to the guide member-attached tube A1 travel. The surface that contacts the outer surface of the installed tube B1 or the installed tube B2 in the spacer AS so that the guide member-attached tube A1 and the subsequent tube connected to the guide member-attached tube A1 can be smoothly advanced, for example, It is preferable to be formed on a smooth surface having no corners in contact with the outer surface of the installed tube B1 or the installed tube B2, such as the protruding curved surface or arc surface shown in FIG.

  The connecting means such as welding is such that the rear end opening edge of one pipe positioned in the front and rear and the front end opening edge of the other pipe are continuous so that the plurality of pipes are continuous in the front-rear direction which is a direction along the center line of the pipe. The installed pipe B1 or the installed pipe B2 configured by being connected to each other is, for example, a pipe having a rectangular cross section perpendicular to the center line of the pipe, and is formed by a plurality of external trapezoidal pipes C1, C1,. Curved tube (tube whose center line is a bent line) BX, straight tube formed by a plurality of external rectangular tubes and extending straight, or formed by a plurality of external curved rectangular tubes to draw an arc It is comprised by the curved pipe formed so that it might bend and extend.

The guide member A3 is made of, for example, a plate material (plate).
The guide member A3 is configured by a rectangular flat plate in which one long side end surface of the four end surfaces of the rectangular flat plate made of iron plate is formed on the inclined surface A33. For example, one of the four end faces of a rectangular flat plate having a long side of 300 mm, a short side of 100 mm, and a thickness of 20 mm is constituted by a rectangular flat plate formed on the inclined surface A33.
The inclined surface A33 is formed as an inclined surface (taper) inclined from one plate surface A34 of the rectangular flat plate toward the other plate surface A35 of the rectangular flat plate, as shown in FIG. 2 and FIG. A blade is formed so that the angle between the other plate surface A35 is an acute angle α ° and the boundary between the inclined surface A33 and the other plate surface A35 is the blade edge A36. It is constituted by a flat plate (plate) formed at an obtuse angle (180 ° -α °) with the plate surface A34.

That is, the pipe A1 with a guide member has one end opening in a direction along one short side (one end A31 side of the guide member A3) on one plate surface A34 of the guide member A3 and the center line A2C of the pipe in the pipe main body A2. The guide member A3 and the pipe main body A2 are connected by a connecting means such as welding with the outer surface A22 on the A21 side facing each other, so that one short side is the outer surface A22 (spacer) of the pipe main body A2. The pipe body A2 is fixed to the outer surface A24 provided with the AS, and the other short side (the other end A32 side of the guide member A3) extends away from the pipe center line A2C of the pipe body A2. One long side end surface of the tube main body A2 on the side close to the one end opening A21 of the tube main body A2 extends from the outer surface A22 of the tube main body A2 to the one end opening A21 side (leading side) of the tube main body A2. ) The guide member is formed on the inclined surface (tapered surface) A33 which is inclined so as to be separated from the outer surface A22 of the tube main body A2, and the cutting edge A36 of the blade is formed by the boundary between the inclined surface A33 and the other plate surface A35. It is a pipe | tube provided with A3 (refer FIG. 2; FIG. 3).
For example, one short side (one end A31 side) in one plate surface A34 of the rectangular flat guide member A3 and the outer surface A22 on the one end opening A21 side in the direction along the center line A2C of the tube in the tube main body A2. The long side of the guide member A3 is positioned on a surface perpendicular to the tube center line A2C in the tube main body A2, and the other short side (the other end A32 side) protrudes outside the tube main body A2. The one short side (one end A31 side) of the guide member A3 is attached and fixed to the outer surface A22 on the one end opening A21 side of the tube main body A2 by a connecting means such as welding.
That is, in the guide member A3, one end A31 side of one plate surface A34 that forms an obtuse angle with the inclined surface A33 is attached to one end opening A21 side of the outer surface A22 of the pipe body A2, and the other end A32 side is the pipe body. This is a configuration that protrudes to the outside of A2 and that the cutting edge A36 is located at a position corresponding to the plate thickness of the guide member A3 from the same plane as the outer surface A22 of the tube main body A2.
Then, one plate surface A34 on the other end A32 side of the flat guide member A3 protruding outside the tube main body A2 is placed on the guide surface B3 formed by the outer surface A22 of the installed tube B1; B2, and the guide It is configured to be guided by the surface B3.

Next, the bent pipe BX composed of the outer trapezoidal pipe C1 and the plurality of outer trapezoidal pipes C1: C1.
For example, as shown in FIG. 4, the outer surface trapezoidal tube C1 is formed in a trapezoidal shape in which a pair of side surfaces (outer surfaces) 2a; Each leg 2t; 2t and a trapezoidal pipe having a configuration in which the angle formed between the upper and lower parallel edges 2s; 2s is not a right angle. The other pair of upper and lower surfaces (outer surfaces) 2b; 2d of the outer surface trapezoidal tube C1 facing each other in parallel are formed in rectangles having different long sides.
The outer surface trapezoidal tube C1 can be easily and inexpensively manufactured by obliquely cutting both end opening edges of the outer surface rectangular tube described above.

As shown in FIG. 5, the bent tube BX is formed by connecting two or more outer trapezoidal tubes C1, C1,..., And the center line BC is bent at the connecting portion 2W of the front and rear outer trapezoidal tubes C1; It is a tube that extends so as to draw a curved line (a folding line that approximates a curve).
In other words, the bent tube BX is the other leg 2t; 2t of the pair of trapezoidal side surfaces 2a of the front outer trapezoidal tube C1 when the outer trapezoidal tube C1 is installed in the ground 10 by a tube installation device described later. The rear end opening edge 2x that opens at the edge and one leg 2t of the pair of trapezoidal side surfaces 2a of the outer side trapezoidal tube C1 on the rear side are connected by welding to the front end opening edge 2y that opens at the edge that is 2t. Thus, the connecting portion 2W between the rear end opening edge 2x of the front outer trapezoidal tube C1 and the front end opening edge 2y of the rear outer trapezoidal tube C1 positioned before and after the tube traveling direction is formed on the front outer surface. The center line BC is connected to the front and rear sides of the trapezoidal tube C1 in a state where water does not flow inside and outside of the outer trapezoidal tube C1 via the rear end opening edge 2x of the trapezoidal tube C1 and the front end opening edge 2y of the rear side trapezoidal tube C1. Outside trapezoidal tube C1; in the underground 10 to be bent at the connecting part 2W of C1 Is a location has been tube.
The bent pipe BX is formed by a plurality of planes in which the other pair of upper and lower outer surface trapezoidal tubes C1; C1,... Facing in parallel with each other, the upper surface (outer surface) 2b and the lower surface (outer surface) 2d are bent at the connecting portion 2W. It becomes the composition. And the guide surface B3 of the bent pipe BX is a concave surface B30 constituted by a plurality of flat guide surfaces B29; B29... Bent at the connecting portion 2W of the bent pipe BX, or a plurality of flat guide surfaces B28; B28. It is formed by the convex surface B31 constituted by.

The length of the other leg 2t of the pair of trapezoidal side surfaces 2a of the front side outer trapezoidal tube C1 connected by the connecting part 2W and the length of one leg 2t of the pair of trapezoidal side surfaces 2a of the rear side trapezoidal tube C1. The same is true.
Further, the bending angle at the connecting portion 2W of the bent line that becomes the center line of the bent tube BX is the connection between the rear end opening edge 2x of the front outer trapezoidal tube C1 and the front end opening edge 2y of the rear outer trapezoidal tube C1. The angle formed by the leg 2t of the trapezoidal side surface 2a of the trapezoidal side tube C1 and the edge 2s of the trapezoid parallel to the upper and lower bases 2s; The farther you are from, the steeper. In other words, as the angle formed becomes closer to a right angle, the angle at which the connecting portion 2W is bent becomes closer to 180 degrees, and as the angle formed becomes farther from the right angle, the angle bent at the connecting portion 2W becomes closer to 90 degrees. Therefore, the angle formed by the trapezoidal side surface 2a in the outer trapezoidal tube 2 may be determined in accordance with the planned progress trajectory of the outer trapezoidal tube C1.
The size of the outer trapezoidal tube C1 is, for example, that the length of the tube (the length in the direction along the center line of the tube) is 463 mm on the upper and lower sides of the trapezoid side surface and 497 mm on the lower bottom side of the trapezoid side surface. Yes, the horizontal width of the tube is 1240 mm, the vertical width of the tube is 690 mm, and the wall thickness of the tube is 16 mm.

According to the pipe installation method of the first embodiment, since the pipe A1 with a guide member in which the guide member A3 is attached only to the head side (one end opening A21 side) of the pipe main body A2 is used, Compared to the case of using a guide member-equipped tube having a guide member extending over the entire length, the friction resistance between the guide member A3 and the ground when the guide member-equipped tube A1 travels in the ground 10 can be reduced, The propulsion reaction force can be reduced when propelling the pipe A1 with guide member, and the pipe A1 with guide member can be smoothly propelled to the ground 10.
Moreover, the guide surface B3 comprised by the outer surface of installed pipe B1; B2 installed in the underground 10 may be deform | transforming under the pressure of a ground. In such a case, when a pipe with a guide member provided with a guide member (plate) extending over the entire length of the pipe main body is used as in Patent Document 1, a guide member extending over the entire length of the pipe main body is provided. It is expected that it becomes difficult to move the deformed guide B3 surface of the installed pipe B1; B2, and it is difficult to advance the pipe with the guide member. On the other hand, when the pipe A1 with a guide member in which the guide member A3 is attached only to the leading side (one end opening A21 side) of the pipe main body A2 as in the pipe installation method of the first embodiment, the guide member A3 is already installed. Moving on the deformed guide surface B3 of the pipes B1 and B2 is easier than the guide member of Patent Document 1, and it is easier to advance the pipe A1 with the guide member than that of Patent Document 1. In particular, when the above-described outer trapezoidal tube C1 is used as a tube, a guide member (plate) extending over the entire length of the tube main body is provided on the deformed guide surface B3 of the installed tube B1; Can not move. On the other hand, in the case of the pipe installation method of the first embodiment, even when the outer trapezoidal pipe C1 is used as the pipe, the guide member A3 can move on the guide surface B3 deformed of the installed pipe B1; B2. It becomes possible to easily advance the pipe A1 with the guide member.
Also, when the pipe with the guide member stops moving due to the ground condition, for example, the pipe with the guide member is shaken in the vertical direction by shaking the rear end side of the pipe with the guide member or the rear end side of the succeeding pipe following the pipe with the guide member. The guide member-equipped tube is advanced by rocking (swinging) the distal end side of the tube and the distal end side of the subsequent tube following the tube with the guide member in the vertical direction. However, in the case where the pipe with the guide member disclosed in Patent Document 1 does not proceed depending on the ground condition, the pipe with the guide member provided with the guide member (plate) disclosed in, for example, FIG. 6 or FIG. The rear end side of the tube with the guide member cannot be swung in the vertical direction, and the front end side of the tube with the guide member cannot be swung (swung) in the vertical direction, so that the tube with the guide member can be advanced. It becomes difficult. On the other hand, when the pipe A1 with a guide member in which the guide member A3 is attached only to the head side (one end opening A21 side) of the pipe body A2 as in the pipe installation method of the first embodiment, Since the end side of the pipe A1 with guide member can be shaken in the vertical direction by shaking the end side in the vertical direction, the pipe A1 with guide member can be easily advanced.
That is, according to the pipe installation method of the first embodiment, even when the guide surface B3 constituted by the outer surface of the installed pipe B1; B2 installed in the underground 10 is deformed by receiving the pressure of the ground, the guide The member A3 can be easily moved on the deformed guide surface B3 of the installed pipe B1; B2, so that the pipe A1 with the guide member can be easily advanced. Even if it does not proceed depending on the situation, the tip end side of the guide member-attached tube A1 can be easily swung up and down, and the guide member-attached tube A1 can be easily advanced.

  In addition, since the guide member-attached pipe A1 is configured such that the guide member A3 is provided only on the leading side (one end opening A21 side) of the pipe main body A2, the guide is provided so as to extend over the entire length of the pipe main body as in the prior art. Compared with the case where a member is provided, the cost of the guide member A3 can be reduced.

Further, since the guide member A3 of the pipe A1 with the guide member is configured to include the blade edge A36 on the leading side in the moving direction of the pipe main body A2, the ground in the forward direction of the pipe A1 with the guide member can be cut down. The pipe A1 with the guide member can be smoothly propelled to the ground 10, and the installation work of the installed pipe B2 with the pipe A1 with the guide member as the head becomes easy.
In particular, the pipe A1 with the guide member is grounded by using a pipe installation device (see Embodiment 8, FIG. 13) configured such that the rotary excavator 46 described later can swing left and right in the direction of underground travel of the pipe A1 with guide member. When installing in the middle 10, since the part between the outer surface of the installed pipe B1 or the installed pipe B2 and the pipe A1 with the guide member is excavated almost in advance, both ends (upper and lower sides) of this excavated part The ground located on one side can be cut by the guide member A3, and the pipe A1 with the guide member can be smoothly advanced.

Further, the pipe A1 with the guide member is inclined so that the inclined surface A33 of the guide member A3 is separated from the outer surface A22 of the tube main body A2 from the outer surface A22 of the tube main body A2 toward the one end (leading) opening A21 of the tube main body A2. The cutting edge A36 is formed by the boundary between the inclined surface A33 and the other plate surface A35 (hereinafter, the cutting edge is referred to as an outward cutting edge A37).
Therefore, as shown in FIG. 5 (a); FIG. 5 (b), the installed pipes B1; B2 are constituted by the bent pipe BX, and the guide surface B3 is bent at the connecting portion 2W of the bent pipe BX. In the case where it is formed by the concave surface B30 constituted by the planar guide surfaces B29; B29..., The other end A32 side of the guide member A3 protruding outward from the tube body A2 of the tube A1 with guide member is the bent tube BX. When the guide member-equipped tube A1 is advanced in the extending direction of the bent tube BX so as to move along the concave surface B30 serving as the guide surface B3, the outward cutting edge A37 of the guide member A3 is separated from the outer surface of the tube body A2. Therefore, the outward cutting edge A37 of the guide member A3 is less likely to collide with the flat guide surface B29 of the front outer trapezoidal tube C1, and the concave surface B30 of the bent tube BX and the guide member A3 are inclined. Since the guide member A3 enters sediment between the surface A33 is pressed in a direction away from the concave B30, the outward edge A37 is further less likely to collide with the plane of the guide surface B29 of the front outer surface trapezoidal tube C1. Therefore, the guide member A3 is easily transferred from the planar guide surface B29 of the rear outer trapezoidal tube C1 constituting the bent tube BX to the planar guide surface B29 of the front outer trapezoidal tube C1, and the guide member-attached tube A1. Can be smoothly propelled to the underground 10.
5 (a) and FIG. 5 (b) show a state in which the pipe A1 with a guide member is propelled to the ground 10 on the back side of the installed pipe B1 or the installed pipe B2.

On the other hand, the inclined surface A33 of the guide member A3 is formed as an inclined surface that inclines away from the outer surface A22 of the tube main body A2 from the outer surface A22 of the tube main body A2 toward the other end (rear end) opening side of the tube main body A2. In the case of using the pipe A1 with a guide member in which the cutting edge A36 is formed by the boundary between the inclined surface A33 and the one plate surface A34 (hereinafter, the cutting edge is referred to as an inward cutting edge A38), When the pipe A1 with the guide member is advanced in the extending direction of the bent pipe BX so that the end A32 side moves along the concave surface B30 that becomes the guide surface B3 of the bent pipe BX, the pressure of the earth and sand in the underground 10 is inclined. In addition to the surface A33, the cutting edge A36 is pressed in a direction approaching the concave surface B30.
Therefore, in this case, when the guide member A3 attempts to move from the planar guide surface B29 of the rear outer trapezoidal tube C1 constituting the bent tube BX to the planar guide surface B29 of the front outer trapezoidal tube C1. The cutting edge A36 easily collides with the planar guide surface B29 of the front external trapezoidal tube C1, and the guide member A3 guides the flat surface of the front external trapezoidal tube C1 from the planar guide surface B29 of the rear external trapezoidal tube C1. This is not preferable because it is difficult to transfer onto the surface B29 and the guide-attached tube A1 cannot be smoothly pushed to the ground 10.

As shown in FIG. 5, the installed pipe B1; B2 is constituted by a bent pipe BX, and the guide surface B3 is bent by a plurality of plane guide surfaces B28; B28... Bent at the connecting portion 2W of the bent pipe BX. In the case where the convex surface B31 is formed, the pipe A1 with a guide member provided with the inward cutting edge A38 described above may be used.
In this case, when the guide member A3 attempts to move from the planar guide surface B28 of the rear external trapezoidal tube C1 constituting the bent tube BX to the planar guide surface B28 of the front external trapezoidal tube C1, the inward Since there is no planar guide surface B28 of the front outer trapezoidal tube C1 in the direction of travel of the cutting edge A38, the inward cutting edge A38 does not collide with the planar guide surface B28 of the front outer trapezoidal tube C1, and the guide member A3 does not collide. It becomes easy to transfer from the planar guide surface B28 of the rear external trapezoidal tube C1 constituting the bent tube BX to the planar guide surface B28 of the front external trapezoidal tube C1. Therefore, the pipe A1 with a guide member can be smoothly promoted to the underground 10.

That is, as shown in FIG. 5, when the guide surface B3 is formed by the concave surface B30, the guide member-equipped tube A1 having the above-described outward cutting edge A37 is used as the guide member A3 that moves on the concave surface B30. When the guide surface B3 is formed by the convex surface B31, the guide member-equipped tube A1 provided with the outward blade edge A37 or the inward blade edge A38 described above may be used as the guide member A3 that moves on the convex surface B31.
In this case, when the guide member A3 attempts to transfer from the planar guide surface of the rear outer trapezoidal tube C1 constituting the bent tube BX to the planar guide surface of the front outer trapezoidal tube C1, the outward cutting edge A37 or The inward cutting edge A38 is less likely to collide with the planar guide surface of the front external trapezoidal tube C1, and the guide member A3 is the front external surface from the planar guide surface of the rear external trapezoidal tube C1 constituting the bent tube BX. It becomes easy to transfer onto the planar guide surface of the trapezoidal tube C1, and the tube A1 with a guide member can be smoothly pushed into the ground 10.

Even when the installed pipes B1 and B2 are formed by a plurality of curved pipes that are formed by a plurality of outer-surface curved rectangular pipes and are bent so as to draw an arc, the guide surface B3 is a concave surface on the inner side of the curved pipe. Or it is comprised by the convex surface of the outer side of a curved pipe. Therefore, the pipe installation method using the pipe A1 with a guide member of the present invention can be suitably applied even when the installed pipes B1 and B2 are formed of the curved pipe.
In particular, the pipe body of the pipe A1 with the guide member is constituted by a curved pipe having a rectangular cross section formed in a concave surface in which the center line of the pipe is curved and a part of the outer surface extends along the center line of the pipe. A3 is formed on an inclined surface that is inclined so that the one end side end surface near the one end opening end of the tube of the tube main body is separated from the outer surface toward the one end opening end of the tube main body from the outer surface formed on the concave surface of the tube main body. It is comprised by the board | plate material in which the blade edge | tip of the blade was formed by the boundary of the said inclined surface and the other board surface, and installed said pipe | tube B1; B2 is connected with the said some curved pipe back and forth, and continues back and forth. When the pipe A1 with the guide member is installed in the ground, the one plate surface on the other end side of the guide member A3 is a concave guide surface of the curved pipe. In this way, the outward cutting edge A37 of the guide member Since it is located away from the outer surface of the pipe body, the outward cutting edge A37 of the guide member is less likely to collide with the concave guide surface of the curved pipe, and the earth and sand are between the concave surface of the curved pipe and the inclined surface of the guide member. When the guide member is pressed in the direction away from the concave surface, the outward cutting edge A37 of the guide member is less likely to collide with the concave guide surface of the curved pipe. Therefore, the guide member can move smoothly on the concave surface of the curved pipe, and the pipe with the guide member can be smoothly pushed into the ground.

  Further, when the installed pipes B1 and B2 are constituted by straight pipes, the cutting edge A36 of the guide member A3 of the pipe A1 with guide member may be either the outward cutting edge A37 or the inward cutting edge A38.

Embodiment 2
As shown in FIG. 6, a pipe A1A with a guide member provided with a guide member A3; A3 may be used on the leading side (one end opening A21 side) of a pair of opposed outer surfaces A22; A22 of the pipe body A2. .
According to the second embodiment, the installed pipe B1 or the installed pipe B2 is sandwiched between the pair of guide members A3; A3 respectively provided on the pair of opposed outer surfaces A22; A22 of the pipe body A2 (FIG. 5). Since the guide member-equipped tube A1 can be advanced, the guide member-equipped tube A1 can be prevented from being displaced in a direction orthogonal to the pair of outer surfaces A22; A22, and the installed tube B2 can be more accurately positioned according to the planned position. And it will be possible to build smoothly.

A guide member A3 is provided on the outer surface of each pipe A19 constituting the installed pipe B2, or guide members are selectively provided on the outer faces of some of the pipes A19 among the pipes A19 constituting the installed pipe B2. A3 may be provided.
Further, the guide member A3 is inclined from one plate surface A34 of the rectangular flat plate toward the other plate surface A35 of the rectangular flat plate and from the other plate surface A35 of the rectangular flat plate to one plate surface A34 of the rectangular flat plate. You may use guide member A3 of the structure provided with the blade edge | tip formed by the boundary with the inclined surface which inclines toward.
Further, the guide member A3 may be formed of a rod-shaped body, for example, instead of a plate material.
Also, as the outer surface trapezoidal tube C1, a pair of outer surfaces facing each other in parallel with each other is formed into a congruent trapezoidal shape, and the ends of the edges of the outer surface trapezoid parallel to each other are connected to each other. One leg is formed by edges that are perpendicular to the edges of the upper and lower bases that are parallel to each other, and the other ends of the edges that are trapezoidal parallel to the upper and lower bases of the outer surface. An outer trapezoidal tube C1 having a configuration in which the other leg connecting the two is formed by an edge that does not form a right angle with these edges may be used.
Further, the pipe A20, the pipe A19, and the pipe main body A2 may be straight pipes having a circular cross section or curved pipes.

Embodiment 3
An example of the above-described tube installation device 1 will be described with reference to FIGS.
As shown in FIG. 7, the pipe installation device 1 includes a pipe 2, an excavation device 3, a propulsion device 4, a propulsion force transmission device 70, a guide stand 90, and a pressing member 110. In the following, the upper side in FIG. 7 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 7 is defined as the rear side of the tube 2 or the tube installation device 1, and the left and right sides in FIG. It is defined as the left and right sides of the tube 2 and the tube installation device 1, and the upper and lower sides in the direction orthogonal to the paper surface of FIG. 7 are defined as the upper and lower sides of the tube 2 and the tube installation device 1. In FIG. 8, the front side, the rear side, the left side, the right side, the upper side, and the lower side of the pipe 2 and the pipe installation device 1 are clearly shown.

The pipe 2 described in the description of the pipe installation device 1 is the pipe A20, the pipe A19, or the pipe main body A2 described above.
Further, in the description of the tube installation device 1, the tube 2 positioned at the head is described as the head tube 6, and the plurality of subsequent tubes 2 provided so as to follow the head tube 6 are described as the subsequent tubes 7.

Hereinafter, the configuration of the pipe installation device 1 will be described with reference to FIGS. 7 to 9.
For example, as shown in FIG. 7, the leading pipe 6 has a guide blade tube that functions as a guide blade provided at the tip of the tube 6x and the tube 6x. And 9. The guide blade tube 9 is a tube including a blade portion 14 in which one open end edge 13 of the tube is formed sharply.
The leading tube 6 is formed by connecting the other opening end of the guide blade tube 9 and the opening end 8 at the tip of the tube 6x. In this case, for example, the outer diameter of the guide blade tube 9 is larger than the outer diameter of the tube 6x, and the inner periphery of the tube at the opening end surface 15 is located on the other opening end surface 15 side of the guide blade tube 9. The surface side is shaved and a step is provided to form a fitting hole 16 into which the opening end 8 at the tip of the tube 6x is fitted. Then, the opening end 8 at the tip of the tube 6x is fitted into the fitting hole 16 provided in the other opening 17 of the guide blade tube 9, and both of them are connected outside the figure such as bolting and welding. By connecting by means, the other opening end of the guide blade tube 9 and the opening end 8 at the tip of the tube 6x are connected. In this way, the opening end 8 at the tip of the tube 6x is fitted into the fitting hole 16 provided in the other opening 17 of the guide blade tube 9, and the guide blade tube 9 is at the end opening end face 18 of the tube 6x. When the tube 6x is propelled, the tip opening end face 18 of the tube 6x does not receive the resistance of the underground 10 and the propulsion resistance can be reduced. In addition, since the fitting hole 16 for fitting the opening end 8 at the tip of the tube 6x is formed, the guide blade tube 9 can be easily installed at the tip of the tube 6x, and the leading tube 6 is formed. The assembly of the tube 6x and the guide blade tube 9 can be facilitated. In this case, a step is generated between the tube 6x and the guide blade tube 9 on the rectangular outer peripheral surface of the leading tube 6. This step is a watertight performance provided on the rectangular outer peripheral surface of the tube 2 and the inner peripheral surface of the starting port. It is formed small (for example, about 1 cm) so that the water stop performance can be maintained by the maintenance member.

The outer diameter of the guide blade tube 9 and the tube 6x is the same diameter, and the boundary portion of the guide blade tube 9 is welded all around with the other opening end surface of the guide blade tube 9 and the tip opening end surface 18 of the tube 6x abutting each other. Alternatively, the leading pipe 6 may be formed by spot welding.
Alternatively, a tube formed on a guide blade portion whose tip side functions as the guide blade tube 9 may be used as the leading tube 6.
In this way, the step on the rectangular outer peripheral surface of the leading pipe 6 can be reduced or no step occurs, so that the water stoppage by the watertight performance maintaining member provided on the rectangular outer peripheral surface of the pipe 2 and the inner peripheral surface of the starting port is provided. Good performance can be maintained.

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

The excavation apparatus 3 includes a substrate 25, an excavation machine 26, a drive source 27, a water supply mechanism 75, and a mud discharge mechanism 76.
The substrate 25 is disposed so that the center line of the top tube 6 and the center line of the substrate 25 coincide with each other, and is provided so as to be movable in the front-rear direction within the top tube 6. The substrate 25 is formed by a rectangular plate 30 corresponding to a rectangular shape that goes around the inner surface of the cross section of the top tube 6. The size of the rectangular plate 30 is smaller than the rectangular dimension that goes around the inner surface of the cross section of the leading pipe 6 and is larger than the rectangular inner peripheral dimension of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21. Is also big. That is, the rectangular peripheral surface 33 on the front surface 39 f of the rectangular plate 30 that forms the substrate 25 and the frame rear surface 32 of the rectangular frame 22 that forms the tube-side thrust receiving portion 21 are formed to face each other. In addition, between the rectangular peripheral surface 33 in the front surface 39f of the rectangular plate 30 which forms the board | substrate 25, and the frame rear surface 32 of the rectangular frame 22 which forms the tube side thrust receiving part 21, the watertight formed by the elastic body, for example A performance maintaining member (packing) 35 is provided. The watertight performance maintaining member 35 is, for example, a rectangular attached to the rectangular peripheral surface 33 of the front surface 39f of the rectangular plate 30 forming the substrate 25 or the frame rear surface 32 of the rectangular frame 22 forming the tube side propulsive force receiving portion 21. The frame 36 is formed. Therefore, the propulsive force transmitted to the substrate 25 is transmitted to the pipe-side propulsive force receiving portion 21 via the watertight performance maintaining member 35, whereby the pipe 2 and the excavating machine 26 are propelled together.
One end of the support portion 40 of the excavating machine 26 is fixed to the central portion of the front surface 39 f of the substrate 25.
In addition, a through hole 38a is formed in the central portion of the substrate 25 so as to penetrate a pressure hose 56 described later.

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

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

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

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

In addition, what is necessary is just to adjust the front-back position of the rotary excavation body 46; 46 suitably by changing the installation position of the pipe side thrust receiving part 21 back and forth.
For example, as shown in FIG. 7, the rotary excavator 46; 46 so that the tip 80 of the excavation bit 52 and the cutting edge 81 of the guide blade tube 9 are located on one plane orthogonal to the central axis of the guide blade tube 9. Although not shown, the rotary excavator 46; 46 is installed so that the tip 80 of the excavation bit 52 protrudes forward from the cutting edge 81 of the guide blade tube 9, or the tip 80 of the excavation bit 52 is The rotary excavator 46; 46 is installed so as to be located in the leading pipe 6.

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

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

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

When the fixed excavation body 77 is not provided, the excavated earth and sand may be clogged between the rotary excavation bodies 46; 46, but the fixed excavation body 77 is interposed between the rotary excavation bodies 46; 46. When the fixed excavation body 77 collides with the ground by propelling the head pipe 6, the fixed excavation body 77 cuts the ground or distributes the earth and sand and rocks in the collided ground portion to the left and right. 46; 46, so that the leading pipe 6 can be promoted more smoothly.
For example, as shown in FIG. 7, the center between the upper and lower sides of the fixed excavation body 77, the excavation bit 52 of the rotary excavation body 46, and the cutting edge 81 of the guide blade tube 9 are on the same plane orthogonal to the central axis of the top tube 6. Configured to be located.
In this way, the center between the upper and lower sides of the fixed excavation body 77, the excavation bit 52 of the rotary excavation body 46, and the cutting edge 81 of the guide blade tube 9 are configured to be located on the same plane perpendicular to the central axis of the top tube 6. In this case, as described above, the fixed excavation body 77 can be easily excavated by inducing cracks in the ground prior to excavation, and the fixed excavation body 77 collides with the ground and the top pipe It can also be prevented that 6 is not promoted.

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

  Further, the tip shape of the fixed excavation body 77 is such that the top pipe 6 collides with the ground by cutting the ground, and the left and right rotary excavation bodies 46 are distributed by dividing the earth and sand on the collided ground portion to the left and right; It may be formed in a shape that can achieve the role of directing to 46, or inducing cracks in the ground prior to excavation to facilitate excavation. For example, as described above, the tip of the front tip may be formed in a sharp blade shape, or the tip of the front tip may be formed in a plane shape, and the shape is such that the ground is easily excavated and broken depending on the geology of the ground. Should be selected.

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

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

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

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

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

  The propulsion device 4 includes, for example, one pair of outer side surfaces 6a; 6b of the pipe 2 having a quadrangular cross section that are installed on a guide stand 90 provided in a guide shaft A that is a starting base of the pipe 2 and facing each other in parallel. A left hydraulic jack 62 disposed so that a cylinder 66 and a piston rod 63 extend in the same direction as the extension direction of the pipe 2 on the outside of the left outer face 6a which is one of the outer faces of the pipe, and the pipe The cylinder 66 and the piston rod 63 are arranged in the same direction as the extension direction of the tube 2 on the outside of the right outer surface 6b which is the other outer surface of the pair of two outer surfaces 6a; A right hydraulic jack 62 arranged to extend. A pressing plate 64 is provided at the tip of the piston rod 63 of the hydraulic jack 62.

A propulsive force transmission device 70 that receives a pressing force from the propulsion device 4 and transmits the pressing force to the tube 2 at the lateral position of the outer surface of the tube 2 installed on the bottom surface side of the guide pit A serving as a starting base of the tube 2. Includes, for example, a pair of propulsion force transmission members 85; 85, a propulsion force transmission rod-like body 710, the above-described substrate 25, the above-described watertight performance maintaining member 35, and the above-described tube-side propulsion force receiving portion 21. .
The left propulsive force transmitting member 85 as one propulsive force transmitting member is formed on the left outer side surface 6a of the pipe 2 having a quadrangular cross section installed on the guide table 90 provided on the bottom surface of the guide shaft A serving as a starting base. A transmission body 71 disposed on the outer side so as to face the left outer surface 6a in parallel, and one end side of the transmission body 71 provided to extend in a direction away from the left outer surface 6a of the pipe 2 A force receiving portion 72 that receives a pressing force from the hydraulic jack 62, and the other end side of the transmission body 71 so as to come into contact with the other end 71f of the rod-like body 71x of the left propulsive force transmission rod-like body 71A described later; And a pressing portion 73 that transmits the force transmitted through the force receiving portion 72 and the transmitting body 71 to the rod-shaped body 71x.
The right propulsive force transmitting member 85 as the other propulsive force transmitting member is formed on the right outer side surface 6b of the pipe 2 having a quadrangular cross section installed on the guide table 90 provided on the bottom surface of the guide pit A serving as a starting base. A transmission body 71 arranged on the outer side so as to face the right outer side surface 6b in parallel, and one end side of the transmission body 71 provided so as to extend in a direction away from the right outer side surface 6b of the pipe 2 A force receiving portion 72 that receives a pressing force from the hydraulic jack 62, and the other end side of the transmission body 71 provided so as to come into contact with the other end 71f of the rod-like body 71x of the right propulsive force transmission rod-like body 71B described later; And a pressing portion 73 that transmits the force transmitted through the force receiving portion 72 and the transmitting body 71 to the rod-shaped body 71x.
The left propulsive force transmission member 85 and the right propulsive force transmission member 85 have the same configuration, for example. Thus, by using the same configuration, the left propulsive force transmission member 85 can be used as the right propulsive force transmission member 85, or the right propulsive force transmission member 85 can be used as the left propulsive force transmission member 85. Can be used and is easy to use. Further, since only one type of propulsive force transmission member 85 needs to be manufactured, the mass productivity is excellent.
The propulsive force transmission rod-shaped body 710 has a length from one end 71e (see FIG. 10) to the other end 71f longer than the shortest distance between the rear surface 39 of the substrate 25 and the rear end 6e of the leading tube 6. 71x and a tilt prevention portion 71c that protrudes from the other end 71f side of the rod-shaped body 71x. The rod-shaped body 71x uses, for example, H-section steel, and the tilt prevention portion 71c uses, for example, a steel material that is joined to the H-section steel forming the rod-shaped body 71x by connection means such as welding or bolts. The tilt preventing portion 71c includes a face body 71d having a surface in contact with the left inner surface and the right inner surface of the leading pipe 6.
The propulsive force transmission rod-shaped body 710 is installed so that the center line of the rod-shaped body 71x faces the same direction as the center line of the top tube 6, and the surface of the face member 71d and the left inner surface and the right inner surface of the head tube 6 The one end 71e and the rear surface 39 of the substrate 25 are joined by connection means such as welding or a bolt so that the two come into surface contact with each other.
That is, the left propulsive force transmitting rod-shaped body 71A is disposed so that the center line of the rod-shaped body 71x faces the same direction as the center line of the leading pipe 6, and the left propulsive force transmitting rod-shaped body 71A has One end 71e of the rod-shaped body 71x of the left propulsive force transmitting rod-shaped body 71A and the rear surface 39 of the substrate 25 are joined by a connecting means such as welding or a bolt so that the left inner surface of the front pipe 6 is in surface contact. The center line of the rod-shaped body 71x of the right propulsive force transmission rod-shaped body 71B is installed so as to face the same direction as the center line of the top tube 6, and One end 71e of the rod-shaped body 71x of the right propulsive force transmitting rod-shaped body 71B and the rear surface 39 of the substrate 25 are joined by connection means such as welding or a bolt so that the right inner surface of the front pipe 6 is in surface contact.
One ends 71e; 71e of the left and right propulsive force transmission rod-like bodies 71A; 71B are coupled to the central portion between the upper and lower edges of the substrate 25.
According to the propulsion force transmission device 70 having the above-described configuration, the right and left propulsion force transmission members 85; 85, the left and right propulsion force transmission rods 71A; 71B, the substrate 25, Since the pipe 2 is propelled by being transmitted to the pipe 2 via the watertight performance maintaining member 35 and the pipe-side propulsive force receiving portion 21, it becomes possible to apply a pressing force evenly to the left and right of the pipe 2.

The guide stand 90 is provided in order to receive a reaction force transmitted from the pipe 2 to the hydraulic jack 62; 62 when the pipe 2 is pressed by the left and right hydraulic jacks 62; 62 in the guide shaft A serving as a starting base. It is installed between the force receiving wall 74 and the side wall AU of the guide pit A which becomes the starting surface.
The guide table 90 includes a guide surface 91 for guiding the pipe 2 to the side wall AU of the guide shaft A on which the pipe 2 is placed and serving as a starting surface, and left and right installations provided on the left and right sides of the guide surface 91. Pedestal 92; 92. The installation table 92 is configured by a table provided so as to rise from the side of the guide surface 91.
Movement of the pipe 2 placed between the inner side surfaces 92a; 92a on the guide surface 91 in the left-right direction is restricted by the inner side surfaces 92a; The
A left hydraulic jack 62 is fixed to the rear side of the top surface of the left installation base 92 by a fixture 67 and the right hydraulic jack 62 is fixed to the rear side of the top surface of the right installation base 92. It is fixed by 67 etc. The hydraulic jack 62 is installed on the top surface of the installation base 92 in an inclined state according to the angle of entry of the pipe 2 into the ground 10, so that the bottom surface of the cylinder 66 of the hydraulic jack 62 is attached to the reaction force receiving wall 74. It is in a state inclined with respect to the front surface. Therefore, a contact plate 79; 79 that contacts the bottom surface of the cylinder 66 is provided on the front surface of the reaction force receiving wall 74.
The force receiving portion 72 of the left propulsion force transmission member 85 is positioned in front of the left hydraulic jack 62 on the rear side of the upper surface of the left installation base 92 and is a pressing portion 73 of the left propulsion force transmission member 85. However, the left propulsive force transmission member 85 is installed so as to come into contact with the other end 71f of the rod-like body 71x of the left propulsive force-transmitting rod-like body 71A.
Further, the force receiving portion 72 of the right propulsive force transmitting member 85 is positioned in front of the right hydraulic jack 62 on the rear side of the upper surface of the right installation base 92 and is pressed by the right propulsive force transmitting member 85. The right propulsive force transmission member 85 is installed so that the portion 73 contacts the other end 71f of the rod-like body 71x of the right propulsive force-transmitting rod-like body 71B.

In addition, since the guide stand 90 mounts a curved pipe or a bent pipe as the pipe 2, as shown in FIG. 12, the guide surface 91 and the upper surfaces of the left and right installation bases 92; 92 are curved in accordance with the curvature of the curved pipe. A structure in which the concave groove 93 is curved and extended along the extending direction of the installation base 92 is used. Further, a pipe entry angle setting means 95 (see FIG. 11; see FIG. 12) for determining the installation inclination angle of the guide surface 91 in accordance with the entry angle of the pipe 2 into the ground 10 is provided. For example, the pipe entry angle setting means 95 is configured by a support base, a support frame, or the like that is detachably provided on the lower surface of the guide table 90 or that is integrally formed on the lower surface of the guide table 90. It is constituted by a support stand, a support frame, etc., which are integrally formed on the lower surface of the guide stand 90.
Furthermore, the outer side surfaces 92b; 92b of the left and right installation bases 92; 92 (the side surfaces facing in parallel to the inner side surface 92a and the left and right side surfaces of the guide base 90) have a concave cross-sectional shape that opens to the outer side surface 92b. A concave groove 93 extending in the extending direction (front-rear direction) of the installation base 92 is provided. The front end surface of the installation base 92 corresponding to the front end of each concave groove 93; Inserted into.
In addition, each support | pillar 111; 111 provided with the travel means 114 of the pressing member 110 mentioned later and the beam material 112 are comprised so that decomposition | disassembly is possible, and the travel means 114 of each support | pillar 111 is inserted in the recessed groove 93. It is also possible to assemble the pressing member 110 by connecting the upper ends of the columns 111; 111 with the beam material 112 in a state where the columns 111; 111 are erected. The front end surface of the installation base 92 corresponding to the front end of 93 and the concave grooves 93 of the guide base 90; the rear end surface of the installation base 92 corresponding to the rear end of 93 may be closed.

As shown in FIG. 11; FIG. 12, the propulsive force transmission member 85 is configured by combining, for example, a transmission body 71, a force receiving portion 72, and a pressing portion 73 that are separately formed of steel.
The transmission body 71 is configured by combining, for example, section steel. And the force receiving part 72 is extended in the direction orthogonal to the said one outer surface from the one end side of the extension direction of the transmission body 71 in one outer side surface 71a of a pair of outer surfaces which the transmission body 71 mutually opposes. The pressing portion 73 is orthogonal to the other outer surface 71b from the other end side in the extending direction of the transmitting body 71 on the other outer surface 71b of the pair of outer surfaces facing each other of the transmitting body 71. It is provided to extend in the direction. That is, the force receiving portion 72 and the pressing portion 73 are provided so as to extend in directions away from the outer side surfaces 71a; 71b of the transmission body 71.
The force receiving portion 72 includes a connecting plate 72a that is connected to one end of one outer surface 71a of the transmission body 71 by connecting means such as a bolt, a nut, or welding, and a force receiving plate 72b that receives the pressing force of the hydraulic jack 62. And a reinforcing plate 72c for connecting the connecting plate 72a and the force receiving plate 72b. The connecting plate 72a is formed by a flat plate that comes into surface contact with one outer surface 71a parallel to the extending direction of the transmission body 71 and is connected to one end side of the one outer surface 71a. The force receiving plate 72 b is formed by a flat plate that forms a surface orthogonal to one outer surface 71 a parallel to the extending direction of the transmission body 71.
The pressing portion 73 includes a connecting plate 73a connected to the other end side of the other outer surface 71b of the transmitting body 71 by connecting means such as a bolt, a nut, or welding, and the other end of the rod-shaped body 71x of the propulsive force transmitting rod-shaped body 710. A pressing plate 73b that comes into contact with 71f and a reinforcing plate 73c that connects the connecting plate 73a and the pressing plate 73b are provided. The connecting plate 73a is formed by a flat plate that comes into surface contact with the other outer surface 71b parallel to the extending direction of the transmission body 71 and is connected to the other end side of the other outer surface 71b. The pressing plate 73 b is formed by a flat plate that forms a surface orthogonal to the other outer surface 71 b parallel to the extending direction of the transmission body 71.

In addition, since the excavating machine 26 is installed inside the first pipe 6 that is first installed in the ground 10, the first pipe 6 should have a length longer than that of the subsequent pipe 7. However, conventionally, when propelling such a long pipe 6, the hydraulic pipe 62 cannot be installed behind the pipe 6 because the pipe 6 is long. In some cases, the front pipe 6 cannot be propelled, or only a small hydraulic jack with a short piston rod extension stroke can be installed behind the front pipe 6. When only a short and small hydraulic jack can be installed, the top pipe 6 can be pushed a little by one maximum extension operation of the piston rod of the hydraulic jack, so the piston lock of the hydraulic jack A hydraulic jack is repeated many times by interposing a spacer (not shown) between the tip of the rod and the other end 71f of the rod-like body 71x, or every time the extension operation of the hydraulic jack ends. In addition, it is necessary to move the hydraulic jack reaction force receiving wall 74 forward and repeat the extension operation of the hydraulic jack many times, and the working efficiency of the hydraulic jack when propelling the top pipe 6 to the ground 10 is poor.
According to the third embodiment, since the hydraulic jacks 62; 62 can be installed beside the left and right outer surfaces 6a; 6b of the leading pipe 6 installed at the starting part, the rear part of the leading pipe 6 installed at the starting part is provided. Even when the hydraulic jack 62 cannot be installed, the leading pipe 6 can be propelled, and a piston rod 63 having a long extension stroke can be used as the hydraulic jack 62. The leading pipe 6 can be moved a long distance by the maximum extending operation, and the working efficiency by the hydraulic jack 62 can be improved.

As shown in FIG. 11; FIG. 12, the pressing member 110 includes a pair of support columns 111; 111 and a pair of support columns provided to face each other in parallel with an interval wider than the left-right width interval of the guide table 90. 111; A structure including a portal body 113 provided with a beam member 112 that connects upper end portions of 111, traveling means 114 provided on the lower end portions of the pair of support columns 111; 111, and a connecting member 120, respectively. It is.
The gate-shaped body 113 is configured by combining a support column 111 and a beam member 112 using, for example, a section steel such as an H-section steel.
The traveling means 114 includes a base 115 fixed to inner surfaces facing each other at the lower ends of the respective columns 111; 111, and a wheel 116 rotatably provided on the base 115 via a rotation center axis. .
The base table 115 is formed of a long member having a concave cross section, for example, provided with rising plates extending vertically in the same direction with respect to the long plate at both long side edges of the long plate. The member is attached with the opening of the recess facing upward so that the member extends in a direction perpendicular to the extending direction of the column 111 and extends in parallel with the side surface of the tube 2.
For example, a base plate of a caster provided with a wheel 116 is fixed to a long plate that forms the bottom of the recess of the base stand 115, and the wheel 116 protrudes upward from the rising plate through the opening of the recess from the bottom of the recess. To be provided. For example, two wheels 116 are provided at intervals along the extending direction of the base table 115.

  The traveling means 114 provided at the lower end of each column 111; 111 is inserted into the left and right installation bases 92; 92 of the guide base 90 through the recessed grooves 93 of the guide base 90 through the opening 93a, and the guide surface 91 under the beam 112 is provided. By inserting the connecting member 120 between the upper surface 6u of the pipe 2 placed on the top and the beam member 112, the upper wall surface 93t as the running surface of the concave groove 93 and the outer peripheral surface of the wheel 116 are brought into contact with each other. When the pipe 2 travels, the portal body 113 including the traveling means 114 and the connecting member 120 are configured to travel together.

  That is, the rear end 6e of the pipe 2 remaining in the guide shaft A after the pipe 2 enters the underground 10 from the front end moves in a direction intersecting the central axis of the pipe 2 (for example, the rear end 6e of the pipe 2 is A pipe rear end movement restricting means 200 that restricts the movement of the pipe rear end movement restricting means 200, and the pipe rear end movement restricting means 200 engages with the wheel 116 of the pressing member 110 and has a concave groove 93 that forms a running surface of the wheel 116. The guide table 90 provided, the wheel 116 is engaged with the concave groove 93, and the wheel 116 is provided so as not to deviate from the concave groove 93 in a direction perpendicular to the extending direction of the concave groove 93. 91, a portal body 113 positioned above the pipe 2 so as to face the upper surface 6u (outer surface of the pipe 2) of the pipe 2 placed on the pipe 91, a beam 112 of the portal body 113, and an upper surface 6u of the pipe 2 Between the wheel 116 and the beam member 112 The peripheral surface is configured to include a connecting member 120 into contact with the upper wall surface 93t of the concave groove 93.

  In other words, the connecting member 120 is inserted between the tube 2 and the beam member 112 so as to bite like a wedge, and comes into close contact with the tube 2 and the beam member 112, so that the tube 2 is advanced when the tube 2 advances. Is transmitted to the pressing member 110 so that the wheel 116 of the pressing member 110 can travel on the traveling surface formed by the upper wall surface 93t of the concave groove 93 and the outer peripheral surface of the wheel 116. It is a member which contacts the upper wall surface 93t. The connecting member 120 is, for example, a contact plate 121 brought into contact with the upper surface 6 u of the pipe 2, and is bitten like a wedge between the contact plate 121 and the beam material 112 to push up the beam material 112 to raise the contact plate 121 and the beam material. 112 and a square member 122 that contacts the upper wall surface 93 t of the concave groove 93.

That is, a gate provided with a pair of struts 111; 111 facing each other and a beam member 112 connecting the upper ends of the struts 111; 111 and traveling means 114; 114 provided at the lower ends of the struts 111; 111. Form 113, guide stand 90 provided with a concave groove 93 into which each traveling means 114 provided at the lower end of each support column 111 of the pressing member 110 is inserted, and a pipe installed on the guide surface 91 of the guide stand 90 2 and the beam member 112 of the gate-shaped body 113 are inserted so as to bite like a wedge so that the tube 2 and the beam member 112 are brought into close contact with each other and the wheel 116 of the gate-shaped body 113 can travel on the traveling surface. When the pipe 2 enters the underground 10 from the tip, the pipe rear end movement restricting means 200 is provided. The pipe rear end movement restricting means 200 includes the connecting member 120 that brings the outer peripheral surface of the pipe into contact with the upper wall surface 93t. Remaining pipe Tube 2 is driven into the ground 10 at the back end 6e of is held down so as not to move in a direction away from the guide surface 91 by a tube rear movement restricting means 200. That is, when the pipe 2 is installed in the ground 10 from the tip, the rear end movement restricting means 200 prevents the rear end of the pipe 2 remaining at the starting portion from rising.
That is, in the third embodiment, a guide table 90 having a guide surface 91 for contacting the lower surface (outer surface) which is one outer surface of the tube 2 and guiding the tube 2 to the side wall AU of the guide shaft A, It is restricted that the rear end 6e of the pipe 2 remaining in the guide shaft A after entering the underground 10 from the tip through the side wall AU of the guide shaft A moves in a direction intersecting the center line of the tube 2. A pipe rear end movement restricting means 200, and the pipe rear end movement restricting means 200 moves together with the pipe 2 while pressing the pipe 2 so as to press the pipe 2 installed on the guide surface 91 against the guide surface 91. The holding member 110 is provided so as to be movable with respect to the guide table 90.

Next, with reference to FIG. 10, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
Here, it is assumed that the pipe length of the leading pipe 6 is longer than that of the succeeding pipe 7, and the succeeding pipe 7 having a pipe length approximately half the length of the leading pipe 6 is used as the trailing pipe 7. An example will be described.
The substrate 25 to which the excavating machine 26, the propulsion force transmission rod 71, the water supply pipe 75 c and the mud pipe 76 b are attached is installed inside the top pipe 6. That is, the rectangular peripheral surface 33 on the front surface 39 f of the rectangular plate 30 that forms the substrate 25 is arranged on the frame rear surface 32 of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21 inside the top tube 6. It is installed so that it is in a state of being pushed through. As a result, when the pipe 2 is installed in the underground 10 from the side wall AU of the guide shaft A serving as the starting base, the excavating machine 26 is installed inside the tip opening 6t side of the leading pipe 6 that is first inserted into the underground 10. Is done.
As shown in FIG. 10 (a), in the guide shaft A serving as a starting base, a guide stand 90 is installed on the front side of the side wall AU, and the excavating machine 26, the water supply pipe 75c, and the mud pipe 76b are attached. The leading pipe 6 is placed on the guide surface 91 with the tip opening 6t of the leading pipe 6 with the substrate 25 placed inside facing the side wall AU of the guide shaft A.
In addition, the guide stand 90 is fixed to the ground of the departure portion with an anchor or the like so that the pipe 2 installed on the guide surface 91 does not move when moving on the guide surface 91, or increases its own weight. For this purpose, a weight is added to the guide base 90 or a heavy weight guide base 90 with an increased weight is used.
The traveling means 114 of the pressing member 110 is inserted into the concave grooves 93 of the left and right installation bases 92; 92 from the opening 93a, and the upper surface of the leading pipe 6 placed on the guide surface 91 below the beam member 112. The connecting member 120 is inserted between 6 u and the beam member 112, and the upper wall surface 93 t as a running surface of the concave groove 93 and the outer peripheral surface of the wheel 116 are brought into contact with each other.
In addition, the left hydraulic jack 62 is fixed to the rear side of the upper surface of the left installation table 92, and the right hydraulic jack 62 is fixed to the rear side of the upper surface of the right installation table 92. Further, the left propulsive force transmission member 85 is installed so that the transmission body 71 faces the rear side of the left side surface 6a of the top pipe 6 in parallel, and the transmission body 71 is connected to the rear side of the right outer side surface 6b of the top pipe 6. The right propulsive force transmission member 85 is installed so as to face each other in parallel.

  10B, the excavating machine 26 and the left and right hydraulic jacks 62; 62 are operated, so that the pressing plate 64 at the tip of the piston rod 63 becomes the force receiving plate 72b of the propulsive force transmitting member 85. At the same time, the pressing plate 73b of the propulsive force transmitting member 85 comes into contact with the other end 71f of the rod-like body 71x, and the leading pipe 6 advances to the ground 10 as the piston rod 63 extends. That is, the pump 75d for water supply shown in FIG. 7 is driven to supply muddy water into the space 69, and the muddy water is circulated between the space 69 and the collecting tank 75X. The propulsive force transmitted to the top pipe 6 via the propulsive force transmission device 70 is achieved by extending the piston rod 63 of the hydraulic jack 62 while supplying the hydraulic oil from the hydraulic motor 47 to the hydraulic motor 47 and rotating the rotary excavator 46. As the rotary excavator 46 rotates, the leading pipe 6 is propelled forward through a starting hole (not shown) formed in the side wall AU of the guide pit A, and the leading pipe 6 is installed in the ground 10. The earth and sand excavated by the rotary excavator 46; 46 in the ground 10 are mixed with water in the space 69 to become muddy water and discharged to the mud tank 76d. When the leading pipe 6 advances, the connecting member 120 and the holding member 110 move together, and the connecting member 120 and the holding member 110 prevent the rear end 6e of the leading pipe 6 remaining at the starting portion from being lifted. The

Next, after the piston rods 63; 63 of the left and right hydraulic jacks 62; 62 are extended to the maximum extent, as shown in FIG. 10 (c), the piston rods 63; After removing 85, the succeeding pipe 7 is installed behind the leading pipe 6, and the rear end opening edge of the leading pipe 6 and the front end opening edge of the succeeding pipe 7 are connected in a watertight state. That is, the succeeding pipe 7 is connected to the rear end 6e of the leading pipe 6 by welding or a fixing tool such as a bolt, and as shown in FIG. 10 (d), the other end 71f of the leading propulsive force transmitting rod-like body 710 and By joining the one end 71e of the subsequent propulsive force transmitting rod-like body 710 with a bolt or welding, the subsequent propulsive force transmitting rod-like body 710 is added behind the leading propulsive force transmitting rod-like body 710, and further, An extension pressure hose (not shown) is added to the other end of the pressure hose 56, an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c, and an extension drain mud pipe (not shown) is connected to the other end of the mud pipe 76b. We will add.
Then, as shown in FIG. 10 (d), the left propulsive force transmission member 85 is installed so that the transmission body 71 faces the left side surface of the subsequent pipe 7 in parallel, and the transmission body 71 is positioned on the right side surface of the subsequent pipe 7. After the right propulsive force transmission member 85 is installed so as to face in parallel, the excavating machine 26 and the left and right hydraulic jacks 62; 62 are operated, so that the pressing plate 64; 64 at the tip of the piston rod 63; While being in contact with the force receiving plate 72b of the propulsive force transmitting member 85, the pressing plate 73b of the propulsive force transmitting member 85 is in contact with the other end 71f of the rod-like body 71x, and the leading pipe 6 further increases as the piston rod 63 extends. The rear pipe 7 moves forward while propelling to the underground 10.
Thereafter, similarly, the pipe C can be constructed by sequentially connecting the subsequent succeeding pipe 7 to the previous succeeding pipe 7 and installing it in the underground 10. If the rear end 6e of the succeeding pipe 7 is lifted when propelling the succeeding pipe 7 into the ground 10, the traveling means 114 of the pressing member 110 is opened in the concave grooves 93 of the left and right installation bases 92; The connecting member 120 is inserted between the upper surface of the succeeding pipe 7 placed on the guide surface 91 below the beam member 112 and the beam member 112, and the upper surface as the running surface of the concave groove 93. If the succeeding pipe 7 is propelled after the wall surface 93t and the outer peripheral surface of the wheel 116 are brought into contact with each other, the rear end 6e of the succeeding pipe 7 remaining in the guide shaft A is prevented from being lifted.
That is, when the leading pipe 6 is installed in the ground 10 and the trailing end 6e of the leading pipe 6 is lifted, the pipe trailing end movement restricting means 200 may be used. If the lifting phenomenon does not occur, it is not necessary to use the pipe rear end movement restricting means 200. Further, when the trailing pipe 7 is propelled to the ground 10 and the trailing end 6e of the trailing pipe 7 is lifted, the pipe trailing end movement restricting means 200 may be used. If the lifting phenomenon does not occur, it is not necessary to use the pipe rear end movement restricting means 200.

  After the pipe C is installed in the underground 10, the excavating machine 26 is pulled back into the guide shaft A which is the starting base that is the starting point of excavation and collected.

  If the above-described pipe installation device 1 is used, an excavation machine having a rotary excavator 46 that rotates around the rotation center line L intersecting the propulsion direction of the front pipe 6 on the inner side of the front pipe 6 on the tip opening 6t side. 26 is pushed and the pipe 2 is pressed and the underground is excavated by the excavating machine 26 so that the pipe 2 is propelled and installed in the underground 10. Since the underground portion near the inner corner of the tube 2 having a rectangular cross section can be excavated by the two rotary excavators 46; 46, the tube 2 can be smoothly driven in the underground 10. Thus, the pipe C can be easily installed in the underground 10.

  According to the pipe installation device 1 of the third embodiment, since the propulsive force transmission device 70 is provided, the inside of the guide shaft A where the pipe installation device 1 is installed is narrow, and the rear side of the pipe 2 in the guide shaft A. Even when there is no installation space for installing the hydraulic jack 62, the hydraulic jack 62; 62 can be installed along the left and right outer surfaces 6a; 6b of the pipe 2, and the hydraulic jack 62 can be installed. Even if 62; 62 cannot be installed on the rear side of the pipe 2, the pipe 2 can be propelled and advanced into the ground 10.

  Moreover, since it becomes possible to install the hydraulic jacks 62; 62 along the sides of the left and right outer surfaces 6a; 6b of the pipe 2, the hydraulic jack 62 having a long extension stroke of the piston rod 63 is used. As a result, the pipe 2 can be moved over a long distance by one maximum extension operation of the piston rod 63, and the working efficiency of the hydraulic jack 62 can be improved.

Further, in the case where a tube having the same length as the tube of the leading tube 6 is used as the succeeding tube 7, in the state of FIG. 10C, instead of the left and right propulsive force transmitting members 85; Further, a horizontal member (not shown) is provided across the pressing plates 64; 64 of the left and right hydraulic jacks 62; 62 so as to come into contact with the other ends 71f; 71f of the left and right propulsive force transmission rods 71A; 71B. When the excavating machine 26 and the left and right hydraulic jacks 62; 62 are operated in this state, the pressing force by the left and right hydraulic jacks 62; 62 is transmitted to the leading pipe 6 through the horizontal member, and the leading pipe 6 moves forward. Therefore, an installation space for the subsequent pipe 7 is formed between the rear end 6 e of the leading pipe 6 and the reaction force receiving wall 74.
When the subsequent pipe 7 is sequentially connected to the rear end of the leading pipe 6, when an installation space for installing the hydraulic jack 62 on the rear side of the subsequent pipe 7 is secured in the guide shaft A, At the starting portion, a hydraulic jack 62 is installed on the rear side of the succeeding pipe 7, and the other end 71f; 71f of the left and right propulsive force transmission rods 71A; 71f; The trailing pipe 7 and the leading pipe 6 may be propelled by pressing a horizontal member (not shown) provided across 71f with the hydraulic jack 62;

According to the third embodiment, after the pipe that restricts the rear end 6e of the pipe 2 remaining in the guide shaft A after the pipe 2 enters the ground from the tip from moving in the direction intersecting the center line of the pipe 2. Since the end movement restricting means 200 is provided, when the pipe 2 is installed in the ground 10 from the tip, the rear end 6e of the pipe 2 remaining in the guide shaft A is lifted in the guide shaft A, for example. Since the phenomenon that the rear end 6e of the remaining pipe 2 moves in the direction intersecting the center line of the pipe 2 (hereinafter referred to as the pipe rear end movement phenomenon) can be suppressed, the traveling direction deviation of the pipe 2 that has entered the underground 10 can be prevented. The pipe 2 can be accurately installed at the planned underground position.
The cause of the phenomenon of the pipe rear end movement described above is that the excavating machine 26 provided inside the leading pipe 6 is heavy, or the leading end side of the pipe installed in the ground 10 of the leading pipe 6. When the length of the pipe remaining in the starting portion is longer than the length of the pipe, it is conceivable that the weight balance of the leading pipe 6 is lost. In addition, the pipe rear end movement phenomenon can occur when either a bent pipe or a bent pipe is used as the pipe 2, but in particular, when the bent pipe is installed in the ground 10, The connecting portion between the pipes constituting the tube becomes a corner portion, and only the corner portion of the connecting portion of the bent tube placed on the guide surface 91 formed on the curved surface comes into contact with the curved surface of the guide surface 91. Since the corner portion of the connecting portion of the bent pipe becomes a rotation fulcrum and is easy to rotate, the above-described tube rear end movement phenomenon tends to become remarkable. According to Embodiment 3, the pipe rear end movement phenomenon can be reliably suppressed.
The pipe rear end movement restricting means 200 can move with the pipe 2 while pressing the pipe 2 so as to press the pipe 2 installed on the guide surface 91 against the guide surface 91 and can move with respect to the guide table 90. Since the pressing member 110 is provided as described above, the pipe 2 can be pushed to the ground 10 while pressing the pipe 2 against the guide surface 91 and suppressing the above-described pipe rear end movement phenomenon.
Further, the pressing member 110 includes a pair of support pillars 111; 111 disposed on both sides of the pipe 2 at an interval wider than the horizontal width of the pipe 2 installed on the guide surface 91, and a pair of support pillars 111; 111. The upper end portions (one end portions) of the pipes 2 are connected to each other and formed on a gate body 113 including an upper surface 6u (outer surface) of the pipe 2 disposed on the guide surface 91 and the beam member 112 facing the upper surface 6u. Since the connecting member 120 for bringing the beam member 112 and the upper surface 6u of the tube 2 into close contact with each other is provided, the tube member 2 is pressed against the guide surface 91 by the beam member 112 and the connecting member 120 of the portal body 113, and the tube after The pipe 2 can be propelled to the ground 10 while suppressing the end movement phenomenon.
The left and right installation bases 92; 92 of the guide base 90 are provided with a concave groove 93 that forms a traveling surface, and the pressing member 110 includes a traveling means 114 that travels on the traveling surface and is engaged in the concave groove 93. The holding member 110 can be moved smoothly, and the propulsion work can be performed efficiently.

Embodiment 4
The pipe rear end movement restricting means may be configured such that the lower end portion of the column 111 of the pressing member 110 is detachably attached to the propulsive force transmission member 85. In this case, since the holding member 110 moves together with the pipe 2 by pushing the pipe 2 while holding the upper surface of the rear end portion of the pipe 2 with the holding member 110, the movement of the rear end of the pipe is performed as in the first embodiment. The phenomenon can be prevented. That is, the pipe rear end movement restricting means 200 according to the second embodiment can move with the pipe 2 while pressing the pipe 2 so as to press the pipe 2 installed on the guide base 90 against the guide surface 91, and the guide base 90 can be moved. The holding member 110 is detachably attached to the propulsive force transmission member 85 so as to be movable. In the case of Embodiment 2, it can be set as the structure which does not provide the travel means 114 and a travel surface.

Embodiment 5
As the pipe rear end movement restricting means, a structure that is formed in a tunnel cylinder surrounding the outer peripheral surface of the pipe 2 placed on the guide surface 91 and is fixed in front of the starting port may be used.

Embodiment 6
As the tube rear end movement restricting means, a weight (not shown) placed on the upper surface 6u of the tube 2 placed on the guide surface 91 may be used.

Embodiment 7
On the inner side surfaces 92a; 92a of the left and right installation bases 92; 92 facing each other, a concave groove (not shown) as a concave portion extending in the extending direction of the installation base 92 with a concave cross section opening to the inner side surface 92a. And the left and right outer surfaces 6a; 6b of the tube 2 are provided with protrusions (not shown) that are inserted into and engaged with the left and right grooves, and the protrusions are engaged with the grooves and protruded. It is good also as a structure provided so that may not remove | deviate from the ditch | groove in the direction orthogonal to the extension direction of the said ditch | groove. That is, the convex portions provided on the left and right outer surfaces 6a; 6b of the pipe 2 placed on the guide surface 91, and the left and right installation bases 92; 92 facing the left and right outer surfaces 6a; Concavity and convexity engagement with a concave groove as a concave portion provided on the inner side surface 92a; 92a, or a concave portion provided on the left and right outer side surfaces 6a; 6b of the tube 2 placed on the guide surface 91, The pipe 2 has entered the ground 10 from the tip due to the concave-convex engagement with the convex portions provided on the left and right inner surfaces 92a; 92a of the left and right installation bases 92; 92 facing the left and right outer surfaces 6a; Pipe rear end movement restricting means for restricting movement of the rear end of the pipe 2 remaining in the rear guide shaft A in a direction intersecting the central axis of the pipe 2 is configured. In addition, it forms in the front end surface of the installation stand 92 corresponding to the front end of each concave groove 94; 94 of the guide stand 90 in the opening outside a figure, and the pipe | tube 2 pushes and a convex part exceeds the said opening | opening, and it is 10 underground. Before entering, the convex part is removed.
In the case of the seventh embodiment, the upper wall of the groove so that the convex portions attached to the left and right outer surfaces 6a; 6b of the pipe 2 by welding, bolts, nuts, etc. can be inserted into the groove from above the guide surface 91. An insertion hole not shown in the drawing is formed.
In the case where no insertion hole is provided, after the tube 2 is placed on the guide surface 91, the protrusions forming the convex portions that are inserted into the groove are welded to the left and right outer surfaces 6a; 6b of the tube 2. You may attach with a bolt and a nut.

  According to the seventh embodiment, the pipe rear end movement restricting means is in contact with the outer surface of the pipe 2 and on both sides of the guide surface 91 when the pipe 2 is put into the ground and the pipe 2 installed on the guide surface 91. Left and right installation bases 92; 92 as inner walls 92a; 92a; 92a; guide base 90 provided with 92a; left and right outer surfaces 6a; 6b of pipe 2 as outer surface of pipe 2 installed on guide surface 91 And a concave / convex engaging body comprising concave and convex portions that are provided on the inner side surfaces 92a; 92a (walls) of the left and right installation bases 92; 92 facing the right and left outer surfaces 6a; 6b. Therefore, the pipe rear end movement phenomenon can be prevented by the concave-convex engagement body.

One or more pipe rear end movement restricting means described in the third to seventh embodiments may be used in combination.
Moreover, although the example which mounts the pipe | tube 2 on the guide surface 91 which is a concave curved surface and installs the said pipe | tube 2 in the ground was shown above, the guide surface which is the curved curved surface of the guide stand 90 is shown. You may make it mount the pipe | tube 2 on the top and install the said pipe | tube 2 in the ground.
Moreover, you may use the pressing member of the structure which is not provided with the connection material 120 as a pressing member of Embodiment 1; 2. For example, the beam material 112 of the portal body 113 and the upper surface 6u of the pipe 2 may be used in contact with each other, or the beam material 112 of the portal body 113 and the upper surface 6u of the pipe 2 may be detachably connected. .
Moreover, it is good also as a structure which the lower wall surface as a running surface of the ditch | groove 93 and the outer peripheral surface of the wheel 116 are made to contact. Further, the running means 114 of the portal body 113 is engaged in the recessed groove 94; 94 formed on the inner side surfaces 92a; You may comprise so that the wheel 116 of the driving | running | working means 114 can drive | work the driving | running | working surface formed in the inside.
It is good also as a structure which does not provide the travel means 114 and a travel surface.
In Embodiments 1; 2; 4, a guide base having a guide surface without the left and right installation bases 92; 92 may be used.

Embodiment 8
As shown in FIG. 13, the rotation center line L of the rotary excavator 46 is parallel to a pair of outer surfaces facing the parallel direction of the leading pipe 6 and is not perpendicular to a plane perpendicular to the propulsion direction of the leading pipe 6. By providing the excavating machine rocking drive device 250 that is set to intersect with each other, the cross-sectional area wider than the cross-sectional area of the leading pipe 6 is provided in front of the leading pipe 6 before the leading pipe 6 advances. You may use the pipe installation apparatus 1X which can excavate and can excavate in front of the front pipe 6. FIG. For example, as shown in FIGS. 13 (a) and 13 (b), the rotary excavation body 46 has a structure that can swing left and right in the underground traveling direction of the pipe A1 with guide member.
Hereinafter, an example of the tube installation device 1X will be described, but the same components as those described in the tube installation device 1 of Embodiment 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
A pipe installation device 1X according to the seventh embodiment includes a excavating machine swing driving device 250 instead of the substrate 25 and the pipe-side propulsion receiving portion 21 that are the configuration of the excavation device 3 of the pipe installation device 1 described in the second embodiment. It is a configuration.
The excavating machine swing drive device 250 includes a swing substrate 300, a guide member 310 of the swing substrate 300, and a swing substrate driving means 320.
In the tube installation device 1X, the guide member 310 is installed on the inner side of the front end opening 6t side of the front tube 6 so that the center line of the tube of the cylindrical guide member 310 matches the center line of the tube of the front tube 6. The watertightness between the outer peripheral surface 330 of the cylinder of the guide member 310 and the inner peripheral surface 6s of the leading pipe 6 is maintained by a watertight performance maintaining member 340 such as rubber packing, and the swinging substrate 300 is mutually connected to the leading pipe 6. The left and right side walls 301; 302 with the center between a pair of parallel outer surfaces facing each other as the center of rotation are attached to the guide member 310 so that the side wall can swing back and forth, and the outer peripheral surface 390 of the swing substrate 300 and the guide member 310 The water tightness between the inner peripheral surface 350 of the cylinder is maintained by a water tightness performance maintaining member 125 such as rubber packing. A propulsive force receiving portion 630 is provided in front of the guide member 310 on the inner side of the leading tube 6 on the tip opening 6t side, and the propelling force receiving portion 630 is installed inside the leading tube 6 on the tip opening 6t side. It is possible to restrict the forward movement of the guide member 310 by contacting the front end surface 311 of the cylinder of the member 310 and to transmit the propulsive force transmitted to the guide member 310 via the propulsive force transmission device 70 to the leading pipe 6. In order to be able to do so, it is fixed to the inner peripheral surface 6s on the tip opening 6t side of the leading pipe 6 by fixing means such as welding, bolts and nuts. Further, the swing substrate 300 is formed with a support holding through hole 130, a mud pipe holding through hole 140, and a water supply tube holding through hole 150 that pass through the flat plate of the swing substrate 300 forward and backward. In the excavating machine 26, the support 42 of the excavating machine 26 is held in a fixed state in a state of being penetrated, and the drainage pipe holding through hole 140 is held in a fixed state in which the tip of the drainage pipe 76b is penetrated. The water supply pipe holding through hole 150 is held in a fixed state with the tip of the water supply pipe 75c penetrating therethrough. Further, the rotary excavating body 46 of the excavating machine 26 having a plurality of excavating bits (excavating blades) 52 is positioned in front of the tip opening 6t of the top pipe 6 and the column 42 that supports the rotary excavating body 46 is a swinging substrate. 300 is supported.
According to the pipe installation device 1X of the eighth embodiment, when excavating the underground 10 in front of the top pipe 6 with the rotary excavator 46, the swing board driving means 320 such as a hydraulic jack is a pair of the swing board 300. By pressing and pulling back the rear surface of the side wall 301; 302 side of the wall, the rotational center line L of the rotary excavator 46 is opposed to the surface perpendicular to the propulsion direction of the leading pipe 6 and the leading pipe 6 in parallel with each other. A first state parallel to a pair of outer surfaces (for example, upper and lower outer surfaces of the leading tube 6), and a pair of outer surfaces of the leading tube 6 facing each other in parallel (for example, upper and lower outer surfaces of the leading tube 6). And a second state (see FIGS. 13A and 13B) that intersects the surface perpendicular to the propulsion direction of the leading pipe 6 in a state other than perpendicular.
That is, the pipe installation device 1X includes the excavating machine rocking drive device 250 for rocking the rotary excavating body 46 in the left-right direction of the top pipe 6 in front of the top pipe 6, so When the rotary excavator 46 is excavated by the rotary excavator 46, the rotary excavator 46 can be swung in the left-right direction by driving the swing substrate 300 by the swing substrate driving means 320, for example. Compared with the case where it does not swing, the left-right width that can be excavated can be increased. In other words, if the pipe installation device 1X is used, the underground 10 can be excavated at a width interval that is wider than, for example, the left-right width interval of the front tube 6 in front of the front tube 6 before the front tube 6 advances. Since it is possible to excavate the front pipe 6 in the left-right width direction in front of 6, the hard ground layer in front of the top pipe 6 can be excavated, and even when the underground 10 is a hard ground layer, the pipe 2 can be underground. 10 can be smoothly promoted.

  In the case where the pipe is installed in the ground 10 using the pipe installation device 1X including the excavating machine swing drive device 250 of the eighth embodiment, the width is wider than the cross-sectional area of the front pipe 6 in front of the front pipe 6. Cross section can be excavated. That is, since the underground pipe 10 in front of the leading pipe 6 can be dug in the underground pipe 10 on the left and right sides of the leading pipe 6, the pipe 2 can be smoothly driven in the underground 10.

Embodiment 9
As shown in FIGS. 14 and 15, the rotary excavation body includes a first excavation bit 8 e and a second excavation bit 8 f as excavation blades provided so as to protrude from the outer peripheral surface 51 of the housing 50. A rotary excavator 46A having the above-described configuration may be used.
A plurality of second excavation bits 8 f are arranged in a direction along the rotation center line L of the housing 50 to constitute a second excavation bit group 810.
A plurality of bit attachment portions 83 are provided on the outer peripheral surface 51 of the housing 50 so as to be scattered. The first excavation bits 8e are detachably attached individually to individual bit attachment portions 83 provided on the outer peripheral surface 51 of the housing 50. The second excavation bit 8 f is provided on a bit installation plate 84 that is detachably attached to a plurality of bit attachment portions 83 provided on the outer peripheral surface of the housing 50. In other words, the second excavation bit group 810 is attached to the bit attachment portion 83 and extends along the rotation center line L of the housing 50 along the circumferential width of the outer peripheral surface 51 of the housing 50 (direction along the rotation center line L). A plurality of second excavation bits 8f on the bit installation surface 84a of the bit installation plate 84 extending across the width of the casing 50, that is, both end surfaces in the direction along the rotation center line L of the casing 50). It is a configuration that is detachably or fixedly provided so as to be aligned in a direction along L.
In each rotating excavation body 46A, the first excavation bits 8e are provided at positions 180 degrees apart from each other in the circumferential direction of the outer peripheral surface 51 of the housing 50. The second excavation bit group 810 is provided on the outer peripheral surface 51 of the housing 50 at a portion where the first excavation bit 8e is not provided.
As shown in FIG. 14 (b), the tips of the respective excavation bits 8f of the second excavation bit groups 810; 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the casing 50 are In addition, it is set so as not to be positioned on the same surface 85e orthogonal to the rotation center line L of the casing 50. That is, the ground portion that is not excavated between adjacent excavation bits 8f in one second excavation bit group 810 can be excavated by each excavation bit 8f of the other second excavation bit group 810. In short, each of the rotary excavating bodies 46A has a complementary pair of second second holes that enable excavation of a ground portion that cannot be excavated by one second excavation bit group 810 using the other second excavation bit group 810. It is the structure provided with the excavation bit group 810; 810.
Then, as shown in FIG. 15 (a), the first distance 80x (that is, the first distance) from the rotation center line L of the housing 50 to the tip of the first excavation bit 8e via a line orthogonal to the rotation center line L. A second radius 81x (that is, a second radius) from the rotation center line L of the casing 50 to the tip of the second drill bit 8f via a line orthogonal to the rotation center line L. The excavation radius by the excavation bit is different.
That is, the excavation diameter by the first excavation bit 8e with the first distance 80x as the excavation radius is between the upper and lower inner wall surfaces 6c and 6d of the head pipe 6 (between the inner wall surfaces of one pair of wall surfaces of the head pipe 6). The excavation diameter by the second excavation bit 8f, which is set to be smaller than the dimension 9x and the second distance 81x is the excavation radius, is based on the dimension 9x between the upper and lower inner wall surfaces 6c; In addition, the rotary excavator 46A is configured to be movable in front of the top tube 6 and inside the top tube 6 through the tip opening 6t of the top tube 6.
That is, the first excavation body 46A passes through the pipe 2 because the rotary excavation body 46A is set to have a rotation radius dimension that allows the rotation excavation body 46A to rotate around the rotation center line L inside the leading pipe 6. The excavating machine 26 can be withdrawn back to the guide shaft A and collected.
Further, the second distance 81x is such that the rotary excavator 46A cannot rotate around the rotation center line L inside the head pipe 6 and the rotary excavator 46A is positioned in front of the tip opening 6t of the head pipe 6. When set, the rotation radius is set to be rotatable.
That is, the rotary excavation body 46A is rotationally driven in a state where the rotary excavation body 46A is positioned in front of the front end opening 6t of the top pipe 6, whereby the first excavation bit 8e and the second excavation bit 8f are The ground at the front position can be excavated, and the rotary excavator 46A can pass through the pipe 2 (the leading pipe 6 and the succeeding pipe 7) so that the pipe 2 can be collected in the guide shaft A.
By providing the rotary excavating body 46A as described above, a hole having a cross-sectional area larger in the vertical width than that of the front end opening 6t can be excavated in front of the front end opening 6t of the front pipe 6, so that the front end of the front pipe 6 The ground can be excavated before the opening edge collides with the ground, and the pipe 2 can be pushed more smoothly.
Further, when the excavating machine 26 is collected, the tip of the second excavation bit 8f of the second excavation bit group 810 is the same as the upper and lower inner wall surfaces 6c; 6d of the top pipe 6, as shown in FIG. After the state where the plane is not located above the position indicating the plane, the rotary excavation body 46A is pulled back into the pipe 2 and collected in the excavation machine 26 guide shaft A.

  That is, according to the ninth embodiment, the first distance 80x (that is, the first excavation) from the rotation center line L of the housing 50 to the tip of the first excavation bit 8e via a line orthogonal to the rotation center line L. The second distance 81x (that is, the second excavation bit 8f) from the rotation center line L of the casing 50 to the tip of the second excavation bit 8f via the line orthogonal to the rotation center line L. The excavation diameter by the first excavation bit 8e with the first distance 80x as the excavation radius is the upper and lower inner wall surfaces of the guide blade pipe 9 (see FIG. 8) of the leading pipe 6. 6c; the drilling diameter by the second drilling bit 8f with the second distance 81x as the drilling radius is set to be larger than the dimension 9x between the upper and lower inner wall surfaces 6c; The rotary excavation body 46A was provided. For this reason, the rotary excavator 46A positioned in front of the front end opening 6t of the top pipe 6 is rotated and the excavation bit 8e; 8f excavates the ground, so that the front pipe 6 is positioned in front of the front end opening 6t of the top pipe 6. The width of the square section of the front end opening 6t of the leading pipe 6 (the width dimension corresponding to the radial direction of the rotary excavator 46A, for example, the upper and lower inner wall surfaces of the leading pipe 6) It is possible to excavate a hole with a square cross section having a width dimension larger than the dimension 9x) between 6c and 6d. Therefore, the ground located in front of the front end opening 6t of the front pipe 6 can be reliably excavated by the excavation bits 8e; 8f before the front end opening edge of the front pipe 6 collides with the ground. It is possible to prevent a situation in which the edge collides with the hard ground and the front pipe 6 cannot be pushed, and the pipe 2 can be pushed more smoothly even when the ground is a hard ground.

The tip positions of the respective excavation bits 8 f of the second excavation bit groups 810; 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the enclosure 50 are the rotation centers of the enclosure 50. It is set so as not to be positioned on the same surface 85e orthogonal to the line L. That is, a pair of second excavation bit groups 810; 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the casing 50 is rotated by the second excavation body 46A. Since the ground portion that cannot be excavated by the bit group 810 can be excavated by the other second excavation bit group 810, a square section having a larger width dimension than the width dimension of the square section of the tip opening 6t of the leading pipe 6 is formed. A hole can be excavated efficiently and the pipe 2 can be propelled more smoothly.
Further, by arranging the second excavation bit groups 810, for example, at equal intervals on the outer peripheral surface 51 of the housing 50 around the rotation center line L, the rotational center of gravity of the rotary excavator 46A can be kept constant. Thus, the rotation of the rotary excavator 46A becomes smooth and can be excavated efficiently, and the pipe 2 can be propelled more smoothly.
In addition, since the second excavation bit 8f and the first excavation bit 8e are provided, a hole having an excavation diameter with the second distance 81x as the excavation radius is made more efficient by the second excavation bit 8f and the first excavation bit 8e. Can be excavated.

The second excavation bit group 810 may be configured by an aggregate of second excavation bits 8f individually attached to individual bit attachment portions 83 provided on the outer peripheral surface 51 of the housing 50.
In addition, on the outer peripheral surface 51 of the housing 50, the individual second linearly or non-linearly in the direction along the rotation center line L across both end faces in the direction along the rotation center line L of the housing 50. The excavation bits 8f are arranged so as to be lined up individually, or along the rotation center line L across both end faces in the direction along the rotation center line L of the casing 50 on the outer peripheral surface 51 of the casing 50. Rotating excavator 46A having a second excavating bit having one excavating blade extending linearly or non-linearly in the direction, the rotating excavator 46A being inside the pipe 2 and rotating centerline L It is only necessary to be configured so that it is not rotatable around the center and is rotatable at a position in front of the tip opening 6t of the top tube 6.
Further, the second excavation bit group 810; 810 may not be provided at positions 180 degrees apart from each other in the circumferential direction on the outer peripheral surface 51 of the housing 50.
In short, the rotary excavator 46A has a first distance 80x from the rotation center line L to the tip of the first excavation bit 8e via a line orthogonal to the rotation center line L, and the rotary excavator 46A is located inside the pipe 6. The second radius 81x from the rotation center line L to the tip of the second excavation bit 8f passing through the line orthogonal to the rotation center line L is set to a rotation radius that can rotate around the rotation center line L. When the body 46A cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavation body 46A is positioned in front of the tip opening 6t of the top pipe 6, it rotates around the rotation center line L. What is necessary is just to set to the possible rotation radius.

Further, the rotary excavator may be configured not to include the first excavation bit 8e. That is, you may use the rotary excavation body which has only the 2nd excavation bit 8f as an excavation bit.
In short, in the case where the rotary excavator does not include the first excavation bit 8e, the shortest distance from the rotation center line L to the outer peripheral surface 51 of the casing 50 of the rotary excavator passing through a line orthogonal to the rotation center line L. The first distance, which is the distance, is set to a rotation radius that allows the rotary excavator to rotate around the rotation center line L inside the pipe 6, and passes through a line perpendicular to the rotation center line L from the rotation center line L. The second distance 81x to the tip of the second excavation bit 8f is such that the rotary excavator cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavator is located at the tip opening 6t of the leading pipe 6. What is necessary is just to set to the rotation radius which can rotate centering | focusing on the rotation center line L when it is located ahead.
That is, the diameter of the casing 50 with the first distance as the radius is set to be smaller than the dimension between the upper and lower inner wall surfaces 6c; 6d of the top pipe 6, and the second distance 81x is the second digging radius. Since the excavation diameter by the excavation bit 8f is set to be larger than the dimension 9x between the upper and lower inner wall surfaces 6c; 6d of the front pipe 6, the rotary excavator 46A opens the tip opening 6t of the front pipe 6. It is configured to be movable in front of the leading pipe 6 and inside the leading pipe 6.
According to the eighth embodiment, a direction perpendicular to, for example, the upper and lower inner wall surfaces 6c; 6d (one pair of wall surfaces of the leading pipe 6) of the leading pipe 6 in front of the leading pipe 6 by excavation by the second drilling bit 8f. Since the underground 10 can be excavated at a wider vertical width interval than the vertical interval of the leading pipe 6 and the front pipe 6 can be excavated in the vertical width direction of the leading pipe 6 in front of the leading pipe 6, Even when the mountain is hard ground, the pipe 2 can be propelled more smoothly.

  In the case where the pipe 2 is installed in the underground 10 using the pipe installation device provided with the rotary excavation body 46A of the ninth embodiment, a cross-sectional area wider than the cross-sectional area of the top pipe 6 is provided in front of the top pipe 6. Can drill. That is, since the underground pipe 10 in front of the leading pipe 6 can be dug in the underground pipe 10 on the upper and lower sides of the leading pipe 6, for example, the above-mentioned pipe rear end movement phenomenon is likely to occur. Therefore, when the pipe 2 is installed in the ground 10 using the pipe installation device of the ninth embodiment, it is effective to suppress the pipe rear end movement phenomenon described above using the pipe rear end movement restricting means described above. It is.

Embodiment 10
If the pipe installation device provided with the rotary excavator 46A of the ninth embodiment and the excavating machine swing drive device 250 of the eighth embodiment is used, the ground on the top, bottom, left and right sides of the top pipe 6 in the ground 10 in front of the top pipe 6 is used. Since the middle 10 additional moats are possible, the above-mentioned pipe rear end movement phenomenon is more likely to occur. Therefore, when the pipe 2 is installed in the ground 10 using the pipe installation device of the ninth embodiment, it is effective to suppress the pipe rear end movement phenomenon described above using the pipe rear end movement restricting means described above. It is.
Further, when the pipe installation device provided with the rotary excavation body 46A of the ninth embodiment and the excavation machine swing drive device 250 of the eighth embodiment is used, the pipe 2 can be smoothed even if the ground is a hard ground layer or a rock layer. Can be promoted.

  As a method for transmitting the propulsive force of the propulsion device such as the hydraulic jack 62 to the pipe 2, a non-illustrated propulsive force transmitting member protruding rearward from the rear end opening of the tube 2 may be provided. You may make it press the rear-end surface of the pipe | tube 2 directly.

Further, as the excavating machine 26, a water jet device (high pressure water injection device), a rotary excavator having the center axis of the pipe 2 as a rotation center, or the like may be used.
For example, if the pipe 2 has a rectangular cross section, it is preferable to use the excavating machine 26. If a pipe having a square cross section is used, a water jet apparatus (high pressure water injection apparatus) is used as the excavating machine. It may be used, a rotary excavator having the center axis of the tube 2 as the center of rotation, or a combination thereof. For example, a rotary excavator having the center axis of the pipe as the center of rotation is installed at the center of the front opening of the top pipe 6, and an injection nozzle of a water jet device is installed at the corner of the front opening of the top pipe 6. In addition, the cross-sectional shape as used in the field of this invention includes the shape where the rectangular corner | angular part was chamfered.

When the pipe 2 is not lifted by the state of the underground 10, for example, a hard ground layer or a rock layer, the pipe rear end movement restricting means 200 may not be used.
Further, the tube 2 may be a tube having a circular cross section. A propulsion device other than the hydraulic jack 62 may be used as the propulsion device.

  As the pipe installation device used in the pipe installation method described in the first and second embodiments, the pipe installation apparatus having the configuration described in the third to tenth embodiments may be used individually, or the third to third embodiments. You may use the pipe installation apparatus of the structure which combined the characteristic of the pipe installation apparatus demonstrated in Embodiment 10 variously.

A1 pipe with guide member, A2 pipe body, A3 guide member,
A21 One end opening of the pipe body, A22 outer surface, A31 one end of the guide member,
A32, the other end of the guide member, A33 inclined surface, A34 one plate surface,
A35 other plate surface, A36 cutting edge, B1; B2 installed pipe, B3 guide surface,
BX bent tube, B29 plane guide surface, B30 concave surface, C1 external trapezoidal tube.

Claims (4)

A pipe installation method in which pipes are installed in the ground so that they are lined up with the installed pipes by advancing the pipes in the extending direction of the installed pipes along the outer surface of the installed pipes already installed in the ground. ,
The tube is provided only on one end opening side of the tube main body and the tube body that penetrates into the ground at the tip of the tube main body, and one end side is fixed to the outer surface of the tube main body and the other end side is the tube of the tube main body Using a guide member-equipped tube provided with a guide member provided so as to extend away from the center line of the tube and projecting to the outside of the tube body, and a spacer ,
When the pipe with the guide member is installed in the ground by proceeding in the extending direction of the installed pipe along the outer surface of the installed pipe from one end opening side of the pipe of the pipe body, the outer surface of the installed pipe is In the pipe installation method used as a guide surface for guiding the other end side of the guide member of the pipe with the guide member ,
The tube body is composed of a tube having a rectangular cross section,
The guide member is constituted by a rectangular flat plate in which one long side end surface of the four end surfaces of the rectangular flat plate is formed as an inclined surface, and one short side of the one plate surface of the guide member and the tube body The outer surface on one end opening side of the tube, which is the side that first penetrates into the ground, is connected, and one long side end surface near the one end opening of the tube main body is connected to the one end of the tube main body from the outer surface of the tube main body. It is a configuration in which the cutting edge of the blade is formed at the boundary between the inclined surface and the other plate surface formed on an inclined surface that is inclined so as to be separated from the outer surface of the tube main body toward the opening side,
The spacer is provided so as to protrude from the outer surface adjacent to the outer surface to which the guide member of the pipe body is attached, and has a surface that contacts the outer surface adjacent to the outer surface of the installed pipe that functions as the guide surface, The pipe installation method, wherein the surface is formed on a protruding curved surface or an arc surface that comes into contact with an outer surface of the installed pipe. The pipe body of the pipe with the guide member is constituted by an outer surface trapezoidal tube having a rectangular cross section in which a pair of outer surfaces facing each other in parallel with each other are formed in a trapezoidal shape.
Before SL installation already tube is coupled to a plurality of said outer surface trapezoidal tube back and forth is constituted by bent tube with a concave guide surface formed by a plurality of planes that bends connecting portion of the front and rear outer surfaces trapezoidal tube ,
The one plate surface on the other end side of the guide member is guided by the concave guide surface of the bent tube when the tube with the guide member is installed in the ground. The tube installation method according to 1. The tube main body of the tube with the guide member is configured by a curved tube having a rectangular cross section formed in a concave surface in which a center line of the tube is curved and a part of an outer surface extends along the center line of the tube,
Before SL installation already tube is coupled to a plurality of said curved pipe front and rear, is constituted by a bent tube having a concave guide surface continuous with the front and rear,
2. When the pipe with a guide member is installed in the ground, one plate surface on the other end side of the guide member is guided by a concave guide surface of the curved pipe. The tube installation method described in 1. It is a pipe with a guide member used for the installation method of the pipe according to claim 1,
The tube body is provided only on one end opening side, which is the side that penetrates into the ground at the end of the tube of the tube body, one end side is fixed to the outer surface of the tube body, and the other end side is from the center line of the tube of the tube body A guide member provided so as to extend in a direction away from the tube body and project outside the tube body, and a spacer ,
The tube body is composed of a tube having a rectangular cross section,
The guide member is constituted by a rectangular flat plate in which one long side end surface of the four end surfaces of the rectangular flat plate is formed as an inclined surface, and one short side of the one plate surface of the guide member and the tube body The outer surface on one end opening side of the tube, which is the side that first penetrates into the ground, is connected, and one long side end surface near the one end opening of the tube main body is connected to the one end of the tube main body from the outer surface of the tube main body. It is a configuration in which the cutting edge of the blade is formed at the boundary between the inclined surface and the other plate surface formed on an inclined surface that is inclined so as to be separated from the outer surface of the tube main body toward the opening side,
The spacer is provided so as to protrude from the outer surface adjacent to the outer surface to which the guide member of the pipe body is attached, and has a surface that contacts the outer surface adjacent to the outer surface of the installed pipe that functions as the guide surface, The guide member-equipped tube , wherein the surface is formed on a protruding curved surface or an arc surface that contacts the outer surface of the installed tube .