JP2006118208A - Tunnel boring machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and positively recover and remove a boring machine body onto the start shaft side through the inside of a pipeline without needing work for releasing connection with pipe bodies after forming the pipeline regarding a tunnel boring machine for forming the pipeline by burying the following pipe bodies in the ground while excavating a tunnel. <P>SOLUTION: The tunnel boring machine comprises a cylindrical body 2 and the boring machine body 1 disposed in a longitudinally slidable manner in the cylindrical body 2. Jacking reaction transmission pieces 4a are sequentially connected to the boring machine body 1, while the pipe bodies P are sequentially connected to the cylindrical body 2 to jack the jacking reaction transmission pieces 4a and the pipe bodies P by a jack from the start shaft B side. The pipe bodies P are thus buried in the tunnel while excavating the tunnel by the boring machine body 1, and after forming the pipeline, the jacking reaction transmission pieces 4a are sequentially pulled back to the start shaft B side and recovered. Following this recovery, the boring machine body 1 is also pulled back integrally, and recovered and removed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tunnel excavator in which a tube body is buried while excavating a tunnel to a predetermined length in the ground, and then an excavator body is removed rearward through the tube body and can be collected.

  In tunnel construction work using the propulsion method and shield method to form pipes in the ground, the tunnel excavator is dug from the start shaft side toward the arrival shaft, and the tunnel is excavated every time a certain length of tunnel is excavated. A pipe line is formed by successively adding a certain length of pipe following the excavator, and tunnel excavators that have reached the reach shaft are usually recovered from the reach shaft to the ground. If there is no existing shaft due to existing human holes on the arrival side, the tunnel excavator must be dismantled after excavation and removed to the start shaft side through the tunnel and recovered. However, there was a problem that the removal and collection work required considerable labor and labor.

For this reason, a tunnel excavator is inserted and fixed in the head pipe body, and the pipe on the start shaft is rotated while rotating the cutter head of the tunnel excavator projecting forward from the opening end of the head pipe body. By pushing the body forward, the tunnel excavator is dug to excavate the tunnel, and each time a certain length of tunnel is excavated, a pipe is formed by sequentially adding pipes. After reducing the cutter head to be smaller than the inner diameter of the pipe body and unfixing the tunnel excavator to the leading pipe body, retract the tunnel excavator through the pipeline to the starting shaft without disassembling, Recovery from the starting shaft to the ground side is performed (see, for example, Patent Document 1).
JP-A-3-267497

  However, according to the above tunnel excavator, when the tunnel excavator is recovered to the start shaft after excavation of the tunnel, the tunnel excavator is disconnected from the leading pipe body, and the earth removal means and the like are used. After being collected and removed on the side, an appropriate traction means is connected to the tunnel excavator, and then the tunnel excavator is towed to the start shaft side by the traction means and collected. Therefore, as a preparatory work before towing and removing the tunnel excavator, a work for breaking the connection between the pipe body and the tunnel excavator and a work for removing the soil removal means etc. from the tunnel excavator are required, which requires considerable labor and labor. In addition, when the tube to be embedded has a small diameter, the work space is extremely narrow, which makes the above preparation work difficult.

  The tunnel excavation by the tunnel excavator is propelled by a propulsion jack installed in the start shaft while the tube is sequentially added on the start shaft, and the propulsive force is transferred from the top tube to the start shaft. Since this is done by transmitting to the tunnel excavator that is integrally connected to the pipe body, the tunnel excavator is connected with all the pipe bodies connected in series as a driving force to press the rear end face of the rearmost pipe body. This requires not only a large propulsion device but also a large-scale propulsion device, and a situation where the tunnel excavator does not dig smoothly, and a large push acting on the last pipe. There was a possibility that the tube may be lost due to pressure.

  The present invention has been made in view of such problems. The object of the present invention is to sequentially embed pipes in a tunnel excavated by the tunnel excavator while smoothly excavating the tunnel excavator. The pipe can be formed efficiently, and after the pipe is formed, the work inside the pipe is efficiently and reliably performed without the need for work to disconnect the connection between the pipe and the tunnel excavator body. It is to provide a tunnel excavator that can collect and remove the excavator main body to the start shaft side.

  In order to achieve the above object, a tunnel excavator according to the present invention, as described in claim 1, digs a tunnel into the ground from a starting port and embeds a pipe body in the tunnel sequentially. A tunnel excavator to be formed, which is located in front of the top tube and whose outer diameter is substantially the same as that of the tube, and is detachably supported in the cylinder via a sealant or the like And an excavator body having an outer diameter smaller than the inner diameter of the pipe body and having a drilling means at the front end opening, and the front end is integrally connected to the rear end of the excavator body through the pipe body. And a thrust reaction force transmission member of the excavator body whose rear end is pulled out to the start opening and a jack for receiving the rear end of the thrust reaction force transmission member, and the cylinder is left behind after tunnel excavation. The propulsion reaction force transmission member to the start side By Nuku can constitute to recover the starting port side excavator body propulsion reaction force transmission member integrally.

  In the tunnel excavator configured as described above, the invention according to claim 2 is characterized in that the propulsion reaction force transmission member is formed by a plurality of propulsion reaction force transmission pieces detachably connected to each other, The invention according to claim 3 is characterized in that the length of each propulsion reaction force transmission piece is the same as the length of the tube.

  Furthermore, in the invention according to claim 4, the excavator body is separated from the start port by separating the propulsion reaction force transmission piece while sequentially pulling the propulsion reaction force transmission piece to the start port side in a state where the cylinder body of the tunnel excavator is left in the tunnel. It is configured to reach the side and collect and remove.

  According to the tunnel excavator of the present invention, in the tunnel excavator that forms a pipeline by sequentially burying the pipe body in the tunnel while excavating the tunnel in the ground from the starting port, A cylindrical body that is located in the front and has an outer diameter that is substantially the same as that of the tubular body, and is supported in the tubular body so as to be detachable via a sealing material or the like, and an outer diameter that is smaller than the inner diameter of the tubular body. An excavator main body having a drilling means at the front end opening, and an excavator main body through which the front end is integrally connected to the rear end of the excavator main body and the rear end is pulled out to the start opening This is composed of a propulsion reaction force transmission member and a jack that receives the rear end of the propulsion reaction force transmission member, so that a pipe is formed by propelling the pipe body underground on the start side. At the same time, the propulsion of this pipe is synchronized with the propulsion speed of the pipe. Separately, the propulsion reaction force transmission member can be propelled by the jack, and the tunnel excavator can be advanced through the propulsion reaction force transmission member. Therefore, the propulsion can be performed without applying a large propulsion force to the pipe body. It can be smoothly and reliably propelled together with the tunnel excavator without causing a defect or the like by force, and the excavation by the tunnel excavator and the embedding work of the pipe body in the tunnel can be efficiently performed.

  Furthermore, the head tube is connected to the rear end of the cylinder which is the outer shell of the tunnel excavator having an outer diameter substantially equal to the outer diameter of the tube, and the excavator body provided in the cylinder Is connected to the cylinder body through a sealing material or the like without being integrally connected to the cylinder body, so that the propulsion reaction piece integrally connected to the rear end of the excavator body after the pipe is formed. By simply pulling the force transmission member back to the start port side, the excavator body can be recovered and removed to the start port side immediately and reliably without performing preparatory work such as dismantling in the tunnel excavator, In addition, the excavator body can be collected and removed efficiently without being influenced by the diameter of the pipe body.

  In the tunnel excavator configured as described above, according to the inventions according to claim 2 and claim 3, the propulsion reaction force transmission member is formed by a plurality of propulsion reaction force transmission pieces that are detachably connected to each other. In addition, since the length of each propulsion reaction force transmission piece is formed to be the same as the length of the pipe body, a tunnel corresponding to the length of the pipe body and the propulsion reaction force transmission piece is formed in the ground by a tunnel excavator. Each time excavation, the starting port has a narrow working space by connecting a tube having a certain length on the start port side and the propulsion reaction force transmission piece to the preceding tube and the propulsion reaction force transmission piece. In addition, while forming the propulsion reaction force transmission member having a desired length, the tunnel excavator can be advanced through the propulsion reaction force transmission member to smoothly form a pipe line having a predetermined length.

  In addition, as described in claim 4, after the pipe of a predetermined length is formed, the propulsion reaction force transmission piece is sequentially pulled out to the start opening side in a state where the cylinder body of the tunnel excavator is left in the tunnel. By detaching, the excavator body reaches the starting port side and is collected and removed, so even if the working space is a narrow starting port, the propulsion reaction force transmission pieces are sequentially and reliably recovered. The excavator main body can reach the start opening side while being removed, and the excavator main body can also be easily collected and removed through the start opening, so that the next pipe line can be formed together with the propulsion reaction force transmission piece. Can be used.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a fume tube, a steel pipe, or the like in the tunnel T while excavating the tunnel T in the ground from the start port provided in the start shaft B. This shows a tunnel excavator A in which a pipe line is formed by burying pipe bodies P sequentially, and this tunnel excavator A has a rear end connected to the front end of the leading pipe P and has an outer diameter. A cylindrical body 2 made of a steel pipe formed approximately the same diameter as the outer diameter of the tubular body P, and is supported in the cylindrical body 2 so as to be slidable in the front-rear direction via a seal member 15 which will be described later. The excavator body 1 formed with a diameter smaller than the inner diameter of the tube P, the excavating means 3 comprising a cutter head disposed in the front end opening of the excavator body 1, and the front end of the excavator body 1 The rear end is connected integrally with the rear end, and the rear end is pulled out to the start port of the start shaft B That promote the reaction force transmission member 4 constitutes a starting pit B propulsion is installed in a propulsion of the excavator main body 1 of the reaction force the rear end surface of the transmission member 4 to the receiving reaction force the receiving jack 5.

  The propulsion reaction force transmission member 4 is formed by sequentially connecting a plurality of propulsion reaction force transmission pieces 4a made of a rod having the same length as the pipe P or a small-diameter steel pipe so as to be detachable. A holding member 6 such as an air bag is interposed at predetermined intervals in the length direction between the inner peripheral surface of the pipe body P, and the propulsion reaction force transmission member 4 is connected to the pipe body P via the holding member 6. It is held in the center of.

  Each time a tunnel corresponding to the length of the pipe body P is excavated by the tunnel excavator A, the pipe body P and the propulsion reaction force transmission piece 4a are added to each other. A common abutment plate 7 is applied to the rear end face of the propulsion reaction force transmission piece 4a, and the tube P is propelled between the abutment plate 7 and the reaction force wall C provided on the rear wall surface of the start shaft B. By disposing the propulsion jack 8 and the propulsion reaction force receiving jack 5 and operating the jacks 5 and 8 at the same extension speed at the same time, the tube P row and the propulsion reaction force transmission member 4 The tunnel excavating means 3 excavates the tunnel while propelling the tunnel reaction machine 4 while propelling the tunnel excavator A by the propulsion reaction force transmission member 4, and the pipe P is buried in the excavated tunnel.

  Further, after excavating the tunnel T to a predetermined length and forming a pipe line by the pipes P connected in series, the propulsion reaction force receiving jack 5 and the propulsion jack 8 installed in the start shaft B, and The plate 7 and the like are removed from the shaft, an appropriate traction means (not shown) is installed in the start shaft B, and the rear end portion of the propulsion reaction force transmission member 4 is pulled into the start shaft B by the traction device. Then, the excavator main body 1 connected to the front end of the propulsion reaction force transmission member 4 is merely arranged to be slidable back and forth with respect to the inner peripheral surface of the cylindrical body 2 via the sealing material 15. As shown in FIG. 2, the inside of the pipe line is pulled back to the start shaft B side together with the propulsion reaction force transmission member 4 in a state where the cylinder body 2 is left.

  In the start shaft B, every time the propulsion reaction force transmission member 4 is pulled back a length corresponding to the length of the propulsion reaction force transmission piece 4a, the propulsion reaction force transmission member 4 is constituted. The pieces 4a are sequentially separated and removed, and when the excavator body 1 reaches the start shaft B, the connection from the leading propulsion reaction force transmission piece 4a is released and the start shaft B is recovered and removed from the shaft. .

  FIG. 3 shows a specific example of the tunnel excavator A, and the tubular body 9 made of the steel pipe of the excavator body 1 in which the outer diameter is formed smaller in the cylinder 2 than the inner diameter of the pipe P. Are arranged concentrically. These cylindrical body 2 and trunk cylinder 9 are divided into front trunk parts 2A and 9A and rear trunk parts 2B and 9B, respectively, and the divided parts, that is, the rear end parts of front trunk parts 2A and 9A, The front end portions of the rear trunk portions 2B and 9B are connected to each other through center bent portions 10 and 11 that can be bent. In this case, the middle bent portion 10 connecting the front and rear trunk portions 9A and 9B of the barrel cylinder 9 of the excavator body 1 is used as the middle bent portion 10 connecting the front and rear trunk portions 2A and 2B of the cylindrical body 2. Provided near the rear side, the front body 2A, 9A can be smoothly refracted simultaneously through the middle bent portions 10, 11 without causing the front body 2A, 9A to collide with the rear body 2B, 9B. It is configured.

  The middle bent portions 10 and 11 slidably slidably contact the outer peripheral surfaces of the front end portions 2A and 9A that are curved in an arc shape with the seal portions 12 on the inner peripheral surfaces of the rear end portions of the front end portions 2A and 9A. Further, as shown in FIG. 5, the front and rear ends are arranged in the four directions between the inner peripheral surfaces of the front and rear body portions 9A and 9B of the body cylinder 9, and the rear end portion and the rear end portion of the inner peripheral surface of the front body portion 9A. Direction correcting jacks 13 connected to the front end portions of the trunk portion 9B are disposed. Further, slide shoes 14 and 14 having a constant height are integrally provided on at least the front and rear lower peripheral surfaces of the outer peripheral surface of the rear cylindrical portion 9B of the trunk cylinder 9, and the top surfaces of these slide shoes 14 and 14 are cylindrical. 2 is slidably supported on the inner peripheral surface of the rear barrel portion 2B in the front-rear direction, and a gap equal to the height of the slide shoe 14 is provided between the cylinder 2 and the barrel cylinder 9. .

  Further, the front end portions of the front body portions 2A and 9A in the cylinder body 2 and the body cylinder body 9 are joined to each other through a seal material 15 so as to be slidable in the front-rear direction. Specifically, the outer peripheral surface is formed flush with the outer peripheral surface of the cylindrical body 2 at the front end of the front body portion 2A of the cylindrical body 2, and the inner peripheral surface is within a certain thickness from the inner peripheral surface of the front cylindrical portion 2A. An annular outer locking member 16 protruding in the direction is fixed integrally, and the rear end surface of the outer locking member 16 is directed inward from the inner peripheral surface of the front barrel portion 2A of the outer cylinder 2. Inwardly inclined rear end face 16a inclined obliquely forward is formed.

  On the other hand, at the front end of the front barrel portion 9A of the trunk cylinder 9, the rear half of the outer circumferential surface is formed flush with the outer circumference of the barrel cylindrical body 9, and the front half is an outer circumferential surface having a smaller diameter than the latter half. An inner locking member 17 formed integrally and slidably joined to the inner peripheral surface of the outer locking member 16 of the cylindrical body 2 via the sealing material 15 is integrally fixed. Further, an outwardly inclined front end surface 17a inclined obliquely forward inward from the outer peripheral surface side is formed at the center of the outer peripheral surface of the inner locking member 17, and the outwardly inclined front end surface 17a is formed as described above. The inwardly inclined rear end surface 16a of the outer locking member 16 is brought into contact with and locked from the rear side so as to be slidably engaged with each other.

  Further, as shown in FIG. 5, grippers 18 and 18 made of hydraulic jacks are arranged in the rear part of the rear barrel part 9B of the trunk cylinder 9 in two directions, up and down or left and right, and fixed. There is a cylindrical body 2 facing the end surface of the rod body 18a through a through hole 9C that penetrates the rod body 18a having a circular cross section of the gripper 18 through the rear body portion 9B of the rear barrel portion 9B over the inner and outer peripheral surfaces. The rear body 2B is removably fitted into a circular recess 2C provided on the inner peripheral surface of the rear part, and the rear body 2B and 9B of the cylinder 2 and the body cylinder 9 are circumferentially, radially, and long. It is connected and fixed so as not to be paranoid in the direction.

  Further, the outer peripheral surfaces of the disk-shaped front and rear partition walls 19 and 20 are integrally fixed to the inner peripheral surface of the front and rear end portions of the front trunk portion 9A of the excavator main body 1, and the rear surface of the rear partition wall 20 As shown in FIGS. 6 and 7, a rolling prevention member 21 protrudes rearward on the outer peripheral portion, and the rolling prevention member 21 protrudes on both sides of the inner peripheral surface of the front end portion of the rear barrel portion 9 </ b> B of the barrel body 9. By inserting the stopper pieces 22 and 22 between the stopper pieces 22 and 22 in an inserted state and bringing both side surfaces of the anti-rolling member 21 into contact with the opposing surfaces of the stopper pieces 22 and 22, the front barrel portion is in front of the rear barrel portion 9B. 9A prevents rolling.

  The excavating means 3 comprising a cutter head disposed in the front end opening of the excavator body 1 has a rotation center shaft portion 3a of the cutter head rotatably supported at the center of the front partition wall 19, and The cutter head is rotated via the meshing gear 24 by the motor 23 mounted on the rear surface of the rear partition wall 20.

  As shown in FIGS. 3 and 4, the excavation means 3 including the cutter head includes a plurality of excavating means 3 having a length shorter than the inner diameter of the barrel body 9 from the front end of the rotation center shaft portion 3 a toward the outer diameter direction ( In the figure, four hollow spoke portions 3b project radially and the outer ends of adjacent hollow spoke portions 3b, 3b are integrally connected by an outer ring portion 3c, and each hollow spoke portion is further connected. A plurality of cutter bits 3d project from the front surface of the portion 3b, and an arm member 3e projecting from the front or outer end surface of the hollow spoke portion 3b is provided with an arm member 3e projecting from the hollow spoke portion 3b. It is arranged so as to be able to protrude and retract in the inner and outer diameter directions from the outer end opening of the.

  In the state where each arm member 3e protrudes from the outer end of the hollow spoke portion 3b, the outer diameter of the cutter head set between the outer ends of the hollow spoke portions 3b and 3b arranged in the diametrical direction is a cylinder. In the state where the outer diameter of the front body portion 2A of the body 2 is equal to or larger than the outer diameter and the arm member 3e is immersed in the hollow spoke portion 3b, the outer diameter of the cutter head is equal to or smaller than the inner diameter of the barrel body 9. It is comprised so that. Furthermore, the means for projecting and retracting the arm member 3e from the outer end opening of the hollow spoke portion 3b is as follows. The jack 25 is disposed in the hollow spoke portion 3b and the rod end thereof is integrally connected to the inner end surface of the arm member 3e. It will be.

  A space between the rear surface of the excavating means 3 composed of the cutter head configured as described above and the front surface of the front partition wall 19 is formed in a sand chamber 26 that takes in the earth and sand excavated by the excavating means 3 and temporarily retains it. The excavated sediment is discharged from the sediment chamber 26 through the drain pipe 27 to the rear. Further, the muddy water was supplied through the muddy water injection pipe 28 into the hollow of the rotation center shaft portion 3a of the cutter head, and the muddy water was poured from the front end surface of the rotation center shaft portion 3a toward the face, and was excavated by the cutter head. The earth and sand are taken into the earth and sand chamber 26 together with the muddy water, the inside of the earth and sand chamber is kept at a constant muddy water pressure to prevent the face from collapsing, and the excavated earth and sand are stirred with the muddy water and discharged through the earth discharge pipe 27. . The soil discharge pipe 27 and the muddy water injection pipe 28 are led out to the start shaft B side through a space between the pipe body P and the propulsion reaction force transmission member 4 forming the above-described pipe, and a fixed length tunnel is excavated. It is configured to add a pipe according to its length every time it is done, and is connected to and communicated with a muddy water tank or a sedimentation tank (not shown) installed on the ground.

  Furthermore, the muddy water injection pipe 28 is connected to and communicated with the rear end central portion 9B of the rear barrel portion 9B of the barrel 9 of the excavator body 1 to introduce muddy water into the hollow of the rotation center shaft portion 3a of the cutter head. A hollow tube 29 is disposed, and a rear end of the hollow tube 29 is closed by an end plate 30, and the excavator body is connected to the end plate 30 from the tubular body 2 of the tunnel excavator A. A front end of the propulsion reaction force transmission member 4 for pulling out one barrel 9 backward is detachably connected. In addition, a front end of a tubular body 9D having a control panel or the like installed therein is detachably connected to the rear end of the rear barrel portion 9B of the trunk cylinder 9. The tube body 9D is formed to have the same outer diameter as that of the body tube body 9. The pipe body 9D is not necessarily provided, and a control wiring, a hydraulic pipe line, or the like may be introduced from the start shaft B side to the tunnel excavator A through the pipe line.

  Next, the operation of the tunnel excavator A configured as described above will be described. First, in order to dispose the trunk cylinder 9 of the excavator body 1 in the cylinder 2 of the tunnel excavator A, the excavating means 3 The outer diameter of the cutter head is reduced until it becomes smaller than the inner diameter of the cylinder 2 and the gripper 18 is contracted so that the front barrel portion 9A of the barrel cylinder 9 is changed to the rear barrel portion of the barrel 2. 2B is inserted from the rear end, and when the front end of the front barrel portion 9A of the barrel body 9 reaches the front end portion of the front barrel portion 2A of the barrel body 2, it is integrally provided at the front end of the front barrel portion 9A of the barrel barrel 9 The outer peripheral surface of the inner locking member 17 is slidably fitted to the inner peripheral surface of the outer locking member 16 provided integrally with the front end of the front body portion 2A of the cylindrical body 2 via the seal material 15. At the same time, the outwardly inclined front end surface 17a of the inner locking member 17 is brought into contact with and engaged with the inwardly inclined rear end surface 16a of the outer locking member 16, thereby preventing the barrel 9 from moving further forward. Condition The gripper 18, 18 are disposed in the barrel 9B after the cylindrical body member 9 reaches the circular recess 2C, 2C are formed on the inner peripheral surface of the body portion 2B after cylindrical member 2 with the.

  In this state, the grippers 18 and 18 are opposed to the circular recesses 2C and 2C, respectively, the rod body 18a of the gripper 18 is extended, and the ends thereof are fitted and locked into the circular recess 2C, whereby The barrel 9 of the excavator body 1 is mounted in the barrel 2 by connecting and fixing the rear barrels 2B and 9B of the barrel 9 in the circumferential direction, radial direction, and length direction so as not to be reluctant. . At the time of mounting, the excavating means 3, the motor 23, the earth removal pipe 27, the direction correcting jack 13 and the like are removed from the trunk cylinder 9, and the trunk cylinder 9 of the excavator body 1 is cylindrical. 2 is inserted until the inner locking member 17 comes into contact with and engages with the outer locking member 16, and then a tunnel excavator A is constructed by incorporating excavating means and the like into the barrel 9. Also good.

  The tunnel excavator A configured in this manner is installed in the start shaft B, and the arm member 3e is projected from the outer end opening of each hollow spoke portion 3b of the cutter head so that the outer diameter of the cutter head as the excavating means 3 is increased. The cutter head is rotated in a state in which the diameter is increased to the same as or slightly larger than the outer diameter of the cylindrical body 2 and is pushed forward by the propulsion jack 8 or the like disposed in the start shaft B to dig a tunnel. .

  When this tunnel excavator A is propelled from the starting shaft B into the ground, the front end of the tube P having a fixed length is connected to the rear end of the rear body 2B of the cylindrical body 2 and the rear of the excavator body 1 After connecting the front end of the propulsion reaction force transmission piece 4a of a certain length to the end, the pipe P and the propulsion reaction force transmission piece 4a are connected to the plurality of propulsion jacks 8 and the propulsion reaction force via the contact plate 7. The jack 5 is pushed forward by being extended, and the tunnel excavator A is further excavated along the tunnel planned line in a state where the tubular body P is followed by the tubular body 2 of the tunnel excavator A.

  The propulsive force generated by the propulsion reaction force receiving jack 5 and the propulsion jack 8 is directly transmitted to the excavator body 1 via the propulsion reaction force transmission piece 4a. After being transmitted from the pipe P to the rear body 2B of the cylinder 2 of the tunnel excavator A, it is transmitted from the rear body 2B to the rear body 9B of the body cylinder 9 of the excavator body 1 through the gripper 18. Further, it is transmitted from the rear body portion 9B to the front body portion 9A of the body cylinder body 9 through the direction correcting jack 13, and is attached to the front end of the front body portion 9A. It is transmitted to the inwardly inclined rear end surface 16a of the outer locking member 16 fixed to the front end of the cylinder 2 joined to the outwardly inclined front end surface 17a via the direction inclined front end surface 17a. The body 9 is simultaneously and integrally propelled. That is, the tunnel excavator A advances by the propulsive force of the propulsion reaction force receiving jack 5 and the propulsion jack 8.

  Since the propulsive force can be transmitted to the tunnel excavator A through the abutment plate 7 by the propulsive force of the plural propulsion jacks 8, the propulsion reaction force receiving jack 5 is provided with the propulsion jack 8. Even if the reaction force during excavation acting on the excavator body 1 by extending in synchronization with the extension is simply received via the propulsion reaction force transmission member 4 including the propulsion reaction force transmission piece 4a, the reaction force is simply received. Good.

  As shown in FIG. 1, the pipe P and the propulsion reaction force transmission piece 4a are sequentially pushed on the start shaft side every time a tunnel of a fixed length is excavated by the tunnel excavator A as shown in FIG. Will be formed. The earth and sand excavated by the excavating means 3 of the tunnel excavator A is discharged from the earth and sand chamber 26 to the start shaft B side through the earth discharge pipe 27.

  During tunnel excavation, if the planned tunnel for forming the pipe is curved or if it is necessary to correct the direction, the distance between the front and rear trunks 9A and 9B of the trunk cylinder 9 of the excavator body 1 Of the four direction correction jacks 13 connected to each other, the predetermined direction correction jack 13 is operated to change the direction of the front trunk portions 2A and 9A in the cylinder body 2 and the trunk cylinder body 9 of the tunnel excavator A to the rear trunk. Direct toward the plan curve tunnel direction with respect to the parts 2B and 9B or the direction to be corrected.

  For example, as shown in FIG. 8, when it is desired to change the direction to the right side, if the right side direction correcting jack 13 is deactivated and the left side direction correcting jack 13 is extended, the trunk of the excavator body 1 Nine front torso parts 9A are refracted in the right direction from the middle bent part 11 with respect to the rear torso part 9B. This refraction angle can be adjusted to be larger or smaller depending on the extension amount of the left direction correcting jack 13. When the front barrel portion 9A of the barrel cylinder 9 is refracted in the right direction from the middle bent portion 11 with respect to the rear barrel portion 9B, the cylinder is covered with a gap with respect to the outer peripheral surface of the barrel barrel 9 The front body portion 2A of the body 2 has an inner locking in which the inner peripheral surface of the outer locking member 16 fixed to the front end is fixed to the front end of the front body portion 9A of the body cylinder 9 of the excavator body 1. Since the outer locking member 16 is slidably contacted with the outer peripheral surface of the member 17, the outer locking member 16 is pressed rightward by the inner locking member 17, so that the front body portion 2A of the cylindrical body 2 is moved against the rear body portion 2B. Thus, the bent portion 10 is simultaneously refracted in the same direction as the front barrel portion 9A of the barrel body 9, and the direction correction and curved tunnel construction during excavation can be easily and accurately performed.

  Next, after excavating a tunnel of a predetermined length by the tunnel excavator A, the excavator main body 1 is removed and collected while leaving the cylinder 2 in the ground. 3e is inserted into the hollow spoke portion 3b so that the outer diameter of the cutter head is smaller than the inner diameter of the outer locking member 16 fixed to the front end of the cylinder 2, and the rod body 18a of the gripper 18 is contracted. By doing so, the connection between the rear body portions 2B and 9B of the tube body 2 and the body tube body 9 is released. Further, as described above, the propulsion reaction force receiving jack 5 and the propulsion jack 8 installed in the start shaft B are removed from the shaft, and appropriate traction means ( (Not shown).

  When the rear end portion of the propulsion reaction force transmission member 4 is pulled rearward by the pulling means in this state, the front end outer peripheral surface of the cylindrical body 2 is connected to the inner peripheral surface of the front end portion of the cylindrical body 2 via the sealing material 15. The body cylinder 9 of the excavator body 1 that is slidably contacted back and forth is retracted, and the front end inner locking member 17 of the front body 9A of the body cylinder 9 is connected to the outer end of the front end of the cylinder 2. The stop member 16 is uncoupled from the inwardly inclined rear end surface 16a and separated rearward from the inwardly inclined rear end surface 16a. At this time, the excavator body 1 slides the front and rear slide shoes 14 and 14 projecting from the front and rear lower peripheral surfaces of the outer peripheral surface of the barrel 9 on the inner peripheral surface of the rear barrel 2B of the cylindrical body 2. While moving backward, the inside of the pipe line formed by the buried pipe body P row is further retracted toward the start shaft B from the rear end of the rear trunk 2B.

  Each time the propulsion reaction force transmission piece 4a of the propulsion reaction force transmission member 4 is pulled back to the start shaft B side, the propulsion reaction force transmission piece 4a is separated from the front reaction force transmission piece 4a and sequentially removed from the shaft. When the leading propulsion reaction force transmission piece 4a is pulled back to the propulsion shaft B, the propulsion reaction force transmission piece 4a is disconnected from the rear end of the excavator body 1 and removed, and then reaches the start shaft B. The excavator main body 1 is recovered and removed from the start shaft B to the ground. Note that the soil discharge pipe 27 and the muddy water injection pipe 28 are also separated and recovered and removed at regular intervals.

  FIG. 9 shows another embodiment of the tunnel excavator of the present invention, and this tunnel excavator A ′ is formed in a single cylinder without dividing its cylindrical body 2 ′ into front and rear trunks. In addition, the barrel 9 'of the excavator body 1' disposed in the cylinder 2 'is also formed to have the same length as the cylinder 2' and an outer diameter smaller than that of the cylinder 2 '. Has been. Furthermore, as shown in FIG. 11, an annular flange 31 is integrally provided on the inner peripheral surface of the front end portion of the cylindrical body 2 ′, while on the outer peripheral surface of the front end portion of the trunk cylindrical body 9 ′ of the excavator body 1 ′. A stopper piece 32 is provided so as to press the stopper piece 32 against the back surface of the flange portion 31, and the outer peripheral surface of the front end portion of the barrel 9 'projecting forward from the stopper piece 32 is disposed inside the flange portion 31. The peripheral surface is slidably supported via a seal material 15.

  Since the excavating means 3 rotatably provided at the front end opening of the excavator main body 1 ′ is the same as the structure shown in FIG. 3 in the above embodiment, detailed description thereof is omitted. In the tunnel excavator A ′, the rear end of the tubular body 2 ′ is connected to the front end of the leading tubular body P whose outer diameter is substantially equal to the outer diameter of the tubular body 2 ′, and each time a fixed-length tunnel is excavated. In the starting shaft B, the pipes P are sequentially added. Further, at the rear end of the barrel 9 'of the excavator body 1', a propulsion made of a pipe material having an outer diameter equal to the outer diameter of the barrel 9 'and the same length as the barrel 2' The front end of the reaction force transmission piece 4a 'is detachably connected by bolts, nuts, etc., and the propulsion reaction force transmission piece 4a' is connected with the pipe P in the start shaft B every time a fixed length tunnel is excavated. The propulsion reaction force transmission member 4 ′ is sequentially joined to form an air flow between the outer peripheral surface of each propulsion reaction force transmission piece 4a ′ and the inner peripheral surface of the pipe body P facing the propulsion reaction force transmission piece 4a ′. A propulsion reaction force transmission member 4 ′ is held at the center of the pipe line through the holding member 6 with the holding member 6 such as a bag interposed.

  As shown in FIG. 12, the propulsion reaction force transmission piece 4a ′ is made of a pipe material in which a plurality of small diameter short tubes 33 and 34 having the same length as the propulsion reaction force transmission piece 4a ′ are disposed. Both ends of the short pipes 33 and 34 are supported in a penetrating manner by end plates closing the openings at both ends of the propulsion reaction force transmission piece 4a 'and the propulsion reaction force transmission pieces 4a' and 4a 'are connected to each other. The front and rear openings of the short tubes 33 and 34 facing each other when connecting are configured to be connected in a watertight manner. These short pipes 33 and 34 are used as excavation earth and sand discharge pipes from the earth and sand chamber 26 of the excavator body 1 ′, mud water supply pipes to the earth and sand chamber 26, etc., and the outer periphery of the propulsion reaction force transmission piece 4a ′. A concave groove portion 35 is provided over the entire length of the surface, and a control wiring for driving the tunnel excavator A, a hydraulic pipe line, and the like are accommodated in the concave groove portion 35. In addition, joint box portions 36 for detachably connecting the propulsion reaction force transmission pieces 4a 'and 4a' with bolts and nuts are provided at the four sides of the front and rear ends of the propulsion reaction force transmission piece 4a '. Yes.

  In addition, a surveying hole 37 penetrating from front to back is provided in the central portion of the propulsion reaction force transmission piece 4a ′, and the laser beam is transmitted from the start shaft B toward the tunnel excavator A ′ through the hole 37. Irradiation is carried out along the planned line while confirming the excavation position of the tunnel excavator A '. Further, in the start shaft B, a plurality of propulsion jacks 8 for propelling the pipe body P and a plurality of propulsion reaction force receiving jacks 5 for pushing the propulsion reaction force transmission member 4 ′ are disposed. The rear end surfaces of 5 and 8 are supported by the reaction force wall C.

  The tunnel excavator A ′ configured in this manner is installed in the start shaft B as in the tunnel excavator A shown in the above embodiment, and the cutter head as the excavating means 3 is connected to the outer diameter of the cylindrical body 2 ′. The cutter head is rotated in a state where the diameter is increased to the same or slightly larger diameter, and is pushed forward by the propulsion jack 8 or the like disposed in the start shaft B to dig the tunnel.

  When this tunnel excavator A ′ is propelled from the start shaft B into the ground, the front end of a fixed length pipe P is connected to the rear end of the cylindrical body 2 ′ and the trunk cylinder of the excavator main body 1 ′. After connecting the front end of the constant length propulsion reaction force transmission piece 4a 'to the rear end of 9', the pipe P and the propulsion reaction force transmission piece 4a 'are connected to the plurality of propulsion jacks 8 and the propulsion reaction force reception. The tunnel excavator A ′ is pushed forward by being extended while being synchronized with the jack 5 so that the extension speed is the same, and the tubular body P ′ is followed by the tubular body 2 ′ of the tunnel excavator A ′. Excavate along the line. Further, each time a tunnel corresponding to the length of the pipe P is excavated by the tunnel excavator A, the pipe P and the propulsion reaction force transmission piece 4a are sequentially pushed on the start shaft B side to form a pipe line. I will do it.

  While the propulsive force of the propulsion reaction force receiving jack 5 is transmitted to the excavator body 1 ′ through the propulsion reaction force transmission member 4 ′ formed by adding a plurality of propulsion reaction force transmission pieces 4a ′ in series, The propulsive force of the propulsion jack 8 is transmitted to the tubular body 2 ′, which is the outer shell of the excavator body 1 ′, through the tubular body P row, and the tubular body P is propelled at the same speed as the excavating speed of the excavator body 1 ′. Is done. The leading tube P following the tube 2 'is connected to the rear end of the tube 2' by a bolt or the like, and the tubes P and P are connected together by a bolt or the like instead of being simply joined. In the case of the addition, the propulsive force by the propulsion reaction force receiving jack 5 is transmitted to the excavator body 1 ′ through the propulsion reaction force transmission member 4 ′, and the barrel 9 ′ of the excavator body 1 ′. Is transmitted from the stopper piece 32 protruding from the outer peripheral surface of the front end portion of the front end of the stopper piece 32 to the flange portion 31 of the cylindrical body 2 ′ so that the cylinder 2 ′ is connected to the excavator main body 1 ′. The tube P row connected to the cylindrical body 2 ′ can be integrally propelled while being integrally propelled.

  Therefore, the propulsion reaction force receiving jack 5 can also serve as the propulsion jack of the pipe P. In this case, the propulsion jack 8 can function as a propulsion auxiliary jack when the propulsion distance is increased and the friction around the tube P is increased.

  Next, after excavating a tunnel of a predetermined length by the tunnel excavator A ′, when the excavator main body 1 ′ is removed and collected while leaving the cylindrical body 2 ′ in the ground, first, the cutter head as the excavating means 3 The above-mentioned propulsion reaction force reception that is reduced in diameter so that it is smaller than the inner diameter of the flange portion 31 and the pipe body P that are provided around the inner peripheral surface of the cylindrical body 2 'and that is installed in the start shaft B The jack 5 and the propulsion jack 8 are removed from the shaft and appropriate traction means (not shown) is installed in the start shaft B.

  When the rear end portion of the propulsion reaction force transmission member 4 ′ is pulled rearward by the traction means in this state, the sealing material 15 is applied to the inner peripheral surface of the flange portion 31 of the cylindrical body 2 ′ with respect to the cylindrical body 2 ′. The body cylinder 9 ′ of the excavator body 1 ′ slidingly contacting and supporting the outer peripheral surface of the front end thereof is moved backward together with the propulsion reaction force transmission member 4 ′. Each time the propulsion reaction force transmission piece 4a 'on the rear end side of the propulsion reaction force transmission member 4' is pulled back to the start shaft B side, the propulsion reaction force transmission piece 4a is disconnected from the front propulsion reaction force transmission piece 4a '. Remove the propulsion reaction force transmission piece 4a 'from the rear end of the excavator body 1' when the head propulsion reaction force transmission piece 4a 'is pulled back to the propulsion shaft B. After the removal, the excavator body 1 ′ that has reached the start shaft B is collected and removed from the start shaft B to the ground.

  At this time, as described above, the plurality of propulsion reaction force transmission pieces 4a ′ constituting the propulsion reaction force transmission member 4 ′ include a plurality of small diameter short diameter pipes used as excavation sediment discharge pipes and muddy water supply pipes. Since pipes 33 and 34 are provided and a concave groove 35 for accommodating a control wiring for driving the tunnel excavator A, a hydraulic pipe line, etc. is provided on the outer peripheral portion, a discharge pipe, a muddy water supply pipe, etc. Recovery / removal work is not required, and the excavator body 1 ′ can be recovered and removed more efficiently. In any of the above-described embodiments, when there is a drill hole such as a human hole on the arrival side of the tunnel excavators A and A ′, the excavating means 3 including the cutter head is separated from the excavator body 1 ′. Thus, the excavating means 3 can be recovered and removed to the ground side through the hole. Therefore, in this case, the cutter head as the excavating means 3 does not have to be formed to be expandable / contractable, and the cylinder 2 The outer diameter of 2 'should be approximately equal. Then, the excavator body 1 or 1 'that cannot be removed from the excavation hole is collected and removed to the start shaft side.

The simplified side view of the tunnel excavator which is forming the pipe line. The simplified side view which shows the collection | recovery after the formation of a pipe line, and a removal state. A longitudinal side view of a tunnel excavator. The front view of a cutter head. The simplified longitudinal back view which shows the gripper and direction correction jack part of a rear trunk | drum. The cross-sectional view of a rolling prevention member. The longitudinal side view. The simplified top view of the state which refracted the front trunk part. The simplified side view which shows another embodiment of the tunnel excavator of this invention. The simplified side view which shows the collection | recovery after the formation of the pipe line, and a removal state. The expanded vertical side view of the engaging part of a cylinder and an excavator main body. The longitudinal front view which shows an example of a propulsion reaction force transmission piece.

Explanation of symbols

A Tunnel excavator B Starting shaft P Pipe body 1 Excavator body 2 Tubular body 3 Drilling means 4 Propulsion reaction force transmission member
4a Propulsion reaction force transmission piece 5 Propulsion reaction force receiving jack 8 Propulsion jack 9 Body
15 Sealing material

Claims (4)

  A tunnel excavator that forms a pipeline by sequentially burying pipes in the tunnel while excavating the tunnel from the start opening, and is located in front of the leading pipe and has an outer diameter A tubular body having substantially the same diameter as the tubular body, an excavator that is detachably supported in the tubular body, has an outer diameter smaller than the inner diameter of the tubular body, and includes a drilling means at the front end opening. A propulsion reaction force transmission member of the excavator body, the front end of which is integrally connected to the rear end of the excavator main body through the pipe body, and the rear end is pulled out to the start opening, and the propulsion reaction force transmission member The excavator body is integrated with the propulsion reaction force transmission member by pulling out the propulsion reaction force transmission member to the start port side with the cylinder remaining after tunnel excavation. That it was configured to collect to the entrance side Tunnel excavator and butterflies.   The tunnel excavator according to claim 1, wherein the propulsion reaction force transmission member is formed by detachably connecting a plurality of propulsion reaction force transmission pieces.   The tunnel excavator according to claim 1 or 2, wherein the length of the propulsion reaction force transmission piece is the same as the length of the pipe body.   With the cylinder remaining in the tunnel, the propulsion reaction force transmission piece is separated while being sequentially pulled out to the start opening side, so that the excavator body reaches the start opening side and is collected and removed. Tunnel excavator characterized by.

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