JP2003184487A - Tunnel boring machine for forming pipeline - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To excavate a tunnel by firmly receiving a propelling reaction acting when the tunnel is excavated without damaging a pipe body in tunnel boring equipment, wherein a tunnel boring machine is disposed in a head pipe body, a pipe line is formed between a start shaft and an arrival shaft, and the tunnel boring machine is pulled back to the start shaft side through the pipeline for recovery. <P>SOLUTION: A ring member 6A is extractably installed between the connection end faces of the head pipe body P incorporating the tunnel boring machine 1 and a subsequent pipe body P1 following the pipe body P. The rear end face of the tunnel boring machine 1 is supported by the inner peripheral part of the ring member 6A projected in the tunnel to receive the propelling reaction on the end face of the pipe body. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator for burying a small-diameter pipe body in the ground to form a pipe line.

[0002]

2. Description of the Related Art Conventionally, in order to bury a small-diameter pipe body such as a sewer pipe in the ground, a tunnel excavator is started from a starting vertical shaft to a reaching vertical shaft and every time a tunnel of a certain length is excavated. At the rear end of the tunnel excavator, pipes are successively and serially followed to form a pipe, which is then propelled and buried. When the pipeline is formed up to the reaching shaft, the tunnel excavator is removed from the inside of the reaching shaft by removing it.

However, when the reaching shaft is a narrow shaft such as an existing manhole, the tunnel excavator cannot be pulled up through the reaching shaft, and therefore the tunnel excavator must be disassembled, removed and recovered. Therefore, the work requires a lot of trouble and labor.

For this reason, as disclosed in Japanese Patent Publication No. 7-68871, a tunnel excavator is formed with a diameter smaller than the inner diameter of the pipe body and installed in the leading pipe body, and a cutter head is installed in the pipe body. Of the pressing bolt, which is made to project from the front end of the opening and is screwed through the peripheral wall of the body portion so as to be able to advance and retreat in the radial direction, is fixed by crimping to the inner peripheral surface of the pipe body. Each time a tunnel excavator is propelled together with a pipe in a state to excavate a tunnel of a certain length, a pipe is constructed by connecting the pipes in sequence, and when the tunnel excavator reaches the reaching shaft, loosen the pressing bolt. After releasing the fixation of the tunnel excavator to the pipe body, the tunnel excavator was pulled out to the starting shaft side through the pipe and a method for forming the pipe was developed.

[0005]

However, according to the above-described method for forming a pipe, in order to fix the tunnel excavator to the pipe body, the pressing bolts screwed into the peripheral wall of the body portion of the tunnel excavator are fixed inside the pipe body. Since it is carried out by crimping to the peripheral surface, a large propulsive reaction force acts on the pressing bolt in a direction orthogonal to the axis during the excavation, and the tip stop plate of the pressing bolt and the inner peripheral surface of the pipe body It is difficult to receive the propulsion reaction force with the crimping force of, and due to this propulsion reaction force, the stop plate slides backward on the inner peripheral surface of the pipe body and the tunnel excavator retracts, causing the cutter head to move. There is a problem that not only excavation cannot be performed, but also the cutter head hits the front end surface of the pipe body and the cutter head and the pipe body are damaged.

Further, if the pressing bolt is pressed against the inner peripheral surface of the tube body more than necessary, the tube body may be damaged, and the pressing bolt itself may be bent or broken by the propulsive reaction force, resulting in work There was a problem that you could not continue. Therefore, it is conceivable to fix the reaction force supporting member to the inner peripheral surface of the pipe body behind the tunnel excavator with a plurality of anchor bolts. In this case, a bolt hole for fixing the reaction force supporting member is formed in the pipe body. Must be drilled,
Moreover, if the reaction force support member is removed when the tunnel excavator is pulled back after the pipe is formed, the large number of bolt holes remain in the pipe body. However, the pipe body may be damaged by the bolt holes.

The present invention has been made in view of the above problems, and an object of the present invention is to make a propulsion reaction force acting during tunnel excavation stronger by an end surface of a tubular body facing in the reaction force direction. (EN) Provided is a tunnel excavating machine for forming a pipe line, which enables the excavation to be carried out smoothly and surely and at the same time does not cause damage or damage to the pipe body.

[0008]

In order to achieve the above object, a tunnel excavator according to the present invention has a structure in which, as described in claim 1, the pipes that follow are sequentially inserted into the tunnel while excavating the tunnel in the ground. A tunnel excavator that forms a pipe line by propelling and burying it, and has an outer diameter smaller than the inner diameter of the pipe body and is installed in the first pipe body so that it can be removed backward through the pipe line. The main body of the tunnel excavator, the cutter head that is rotatably supported by the excavator body, and protrudes forward from the opening end of the leading pipe body, the drive mechanism of the cutter head, and the rear of the excavator body. And a reaction force receiving means for receiving the propulsion reaction force of the tunnel excavator, and the reaction force receiving means is composed of a ring member that is detachably interposed between the joint end faces of the adjacent pipes. There is.

In the tunnel excavating machine according to a second aspect of the present invention, the ring member is formed by combining a plurality of split ring pieces curved in an arc shape in the circumferential direction of the pipeline, and the split ring pieces are formed. At least one of them has a shape in which both joint end faces in the circumferential direction are inclined outwardly toward the inner peripheral side, and the outer peripheral portion of the ring member can be extracted between the joint end faces between adjacent front and rear pipes. It is characterized in that it is interposed and receives the rear end of the excavator main body at the inner peripheral portion projecting inward from the pipe body.

Further, in the invention according to claim 3, the ring members are arranged on the front and rear sides of the tubular body connected to the leading tubular body, and the inner peripheral portions of the front and rear ring members projecting into the tubular body are provided. A reinforcing frame body is interposed and connected between the opposed surfaces, and the front and rear end surfaces of the reinforcing frame body are detachably connected to the opposed surfaces of the inner peripheral portions of the front and rear ring members protruding into the pipe path and the conduit path. A plurality of horizontal frame members arranged at predetermined intervals in the circumferential direction and a plurality of arc-shaped frame members detachably connected between the facing surfaces of the adjacent horizontal support members. Characterize.

According to the invention of claim 4, the rear end of the excavator main body is supported on the reinforcing frame without directly supporting the rear end of the excavator main body on the reinforcing frame. The structure is such that they are connected via.

According to a fifth aspect of the present invention, there is provided rolling prevention means for an excavator main body, wherein an annular end face plate is detachably fixed to a front end face of a leading pipe body in a pipe line, and the outside of the end face plate. A hood portion is provided on the periphery to project forward, and the inner peripheral portion projects inward from the inner peripheral surface of the pipe body, and the front end surface of the excavator body is detachably connected to the rear surface by bolts. It has a structure of

According to a sixth aspect of the present invention, there is provided a cutter head structure, wherein the outer diameter of the cutter head is smaller than the inner diameter of the conduit, and the cutter radially emerges from the outer periphery of the cutter head. The feature is that the tooth is arranged.

[0014]

Operation: The tube body that houses the main body of the tunnel excavator is propelled from the start vertical shaft to the ground, and the tunnel is excavated while the cutter head protruding from the opening front end of the tube body is rotated. At this time, a cutter tooth is projected from the outer periphery of the cutter head to excavate a tunnel having a diameter into which the pipe body can enter and be buried. The propulsion of the pipe is performed by extending the propulsion jack provided in the starting shaft, and each time the tunnel of the length equal to the length of one pipe is excavated, the next pipe is A pipe line is formed in the ground by repeating the work of pushing the rear end face of the pipe body with the propelling jack afterward.

When the tunnel excavator excavates while pushing the pipe body, the propulsive reaction force of the pipe body acts on the excavator body via the cutter head, but the rear end of the excavator body is supported by the ring member. Since this ring member is interposed between the joint end faces of the adjacent pipes, the propulsive reaction force is received by the front end face of the succeeding pipe body facing the direction in which the propulsive reaction force acts. become. Therefore, the propulsion reaction force is firmly received by the pipe body, and the tunnel excavator does not retract, and further, the pipe body can be smoothly advanced without damaging the pipe body.

Further, while the ring members are arranged in front of and behind the pipe body succeeding the leading pipe body, the reinforcing frame body is interposed between the opposed faces of the inner peripheral portions of the front and rear ring members projecting into the pipe lines. Then, a plurality of horizontal frame members arranged at predetermined intervals in the circumferential direction of the pipeline in the reinforcing frame are detachably connected to the facing surfaces of the front and rear ring members, and the adjacent horizontal support members are circled. By providing the structure connected by the arc-shaped frame material, a strong reaction force receiving means can be formed without bolting the ring member or the reinforcing frame body to the pipe body, and therefore the pipe wall is not damaged. Not only that but also the removal work can be done easily.

Further, if an end face plate is attached to the front end face of the pipeline and the front end face of the excavator body is connected to this end face plate by bolts, the rolling reaction of the excavator body due to the rotational reaction force of the cutter head can be prevented. Occurrence can be prevented.

Although the rear end surface of the excavator main body may be directly received by the ring member, a plurality of space is provided between the rear end portion of the excavator main body and the reinforcing frame of the reaction force receiving means. If connected by a direction correction jack, the direction of the pipeline can be corrected and a curved pipeline can be easily formed.

When the tunnel excavator reaches the reaching shaft, the above-mentioned cutter tooth for excavating the front of the tubular body in the cutter head is immersed in the cutter head, while the connection between the excavator main body and the ring member or the reinforcing frame is released. After that, these ring members and the reinforcing frame are removed to the side of the starting shaft through the pipeline. Incidentally, instead of a cutter tooth for excavating the front of the pipe body, an outer peripheral cutter member having an annular shape may be detachably attached to the outer periphery of the cutter head. In this case, this cutter member is passed through the reaching shaft. To remove. Further, as described above, if the ring member is formed by combining a plurality of split ring pieces, the work of extracting from the joint end faces of the tubular bodies can be easily performed. In this way, after removing the ring member or the reaction force receiving means composed of the ring member and the reinforcing frame, the tunnel excavator is removed and recovered by pulling it back to the starting shaft side through the pipeline.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a concrete embodiment of the present invention will be described with reference to the drawings. A tunnel excavator A has a length shorter than a pipe length of a leading pipe body P made of a fume pipe to be buried. In addition, the outer diameter of the excavator body 1 having a cylindrical barrel shape is formed to be smaller than the inner diameter of the pipe P, and the excavator body 1 is integrally fixed to the opening front end to close the opening front end. And a disk-shaped partition wall 2 having a circular shape, and a central rotation shaft 3a thereof is rotatably inserted and supported in the center of the partition plate 2 and the outer diameter of which is smaller than the inner diameter of the tubular body P. Drive mechanism 4 equipped with a cutter head 3 and a motor 4a mounted on the back surface of the partition plate 2 to drive the cutter head 3 in rotation.
And the earth and sand discharging means 5 which faces the lower rear surface of the cutter head 3 having the front end opening penetrating the lower end of the partition plate 2.

The earth and sand discharging means 5 is composed of a screw conveyor in which a screw 5b is rotatably arranged in a cylindrical casing 5a, and is inclined obliquely upward from a front end to a rear end. Excavator body 1
Is supported by a support rod 6. 5c is screw 5b
Is a rotary drive motor, and 5d is a soil and sand discharge port that is opened and closed by an opening and closing plate 5e at the lower peripheral portion of the rear end of the casing 5a. Further, the excavator main body 1 rotatably supports a guide roller 10 which can roll on the inner bottom surface of the pipe body P on the lower peripheral portion thereof, and on the inner bottom surface of the pipe body P via the guide roller 10. Supported by.

The cutter head 3 projecting forward from the partition plate 2 of the excavator body 1 is formed such that the outer diameter of the central drive shaft 3a is smaller than the inner diameter of the pipe P as shown in FIG. A plurality of scraper teeth between the annular frame 3b
Arms 31 projecting forward from 31 and arms 34 projecting a plurality of cutter bits 33 are radially arranged alternately from the intermediate drive shaft 3a in the circumferential direction, and these arms are provided. The outer ends of 32 and 34 are integrally fixed to the peripheral frame 3b, and the arm 34 projecting the cutter bit 33 is formed in a hollow shape.
That is, the movable arm member 36 including the cutter tooth 35 protruding from the peripheral frame 3b in the extension direction of the arm 34 is retractably housed.

The retracting means of the movable arm member 36 is shown in FIG.
As shown in FIG. 3, a jack 37 is disposed in the arm 34, the tip of the rod of the jack 37 is connected to the movable arm member 36, and the expansion and contraction of the rod is performed. It is configured to project from the head 3 and excavate the front ground of the leading pipe body P.

Further, the rear end of the excavator main body 1 disposed in the leading pipe body P is mounted on the side of the succeeding pipe body P1 which connects the front end face to the rear end face of the pipe body P in a butt shape. It is connected to and supported by the reaction force receiving means 6. The reaction force receiving means 6 is composed of a ring member 6A which is detachably interposed between the joint end faces of the tube bodies adjacent to each other in the front-rear direction, and a reinforcing frame body 6B which is detachably attached to the ring member 6A. As shown in FIG. 3, FIG. 5 and FIG. 6, 6A is an annular shape having an outer diameter equal to or slightly smaller than the outer diameter of the pipe P and an inner diameter smaller than the inner diameter of the pipe P and having a constant thickness. Steel plate, and the inner peripheral portion of the steel plate is projected into the tunnel T from the inner peripheral surface of the pipe body P.

The ring member 6A is formed by combining a plurality of split ring pieces 6a, 6a ... Having a predetermined arc length curved in an arc shape in the circumferential direction of the tubular body P. A plurality of reinforcing ribs 61 are provided on one surface of the inner peripheral portion of the ring pieces 6a, 6a that protrudes inward from the pipe P at regular intervals in the circumferential direction, and the split ring pieces are provided at both end edges. A flange 62 having a bolt hole for connecting with a bolt 63 is provided in a protruding manner, and further, a horizontal support member 6b of the reinforcing frame body 6B is provided at the center of the inner peripheral side of each split ring piece 6a.
Bolt holes for connecting the front and rear end surfaces of 1 with bolts 64 are provided. Also, the split ring pieces 6a, 6a ...
Among them, the ring piece 6a 'arranged on the top is the ring member 6
In order to facilitate the assembly and disassembly of A, with another ring piece 6a assembled between the joint end faces of the front and rear pipe bodies,
The joint end surfaces on both sides in the circumferential direction are inclined outward toward the inner circumferential side so that they can be inserted and removed in the radial direction.

The ring member 6A having the above-mentioned structure includes the above-mentioned leading pipe body P in which the excavator main body 1 is housed and this pipe body P.
The outer peripheral portion is interposed between the joint end surfaces of the subsequent pipe body P1 and the joint end faces of the subsequent pipe body P1 and the next pipe body P2 connected to the subsequent pipe body P1 so as to be able to be extracted. .

On the other hand, as shown in FIGS. 3 and 4, the reinforcing frame body 6B is composed of a plurality of horizontal frame members 6b1 having substantially the same length as the succeeding tubular body P1.
And a plurality of arcuate frame members 6b2 that connect between the horizontal frame members 6b1 and 6b1 that are adjacent to each other in the circumferential direction, and between the inner peripheral portions of the ring members 6A and 6A that face each horizontal frame member 6b1 back and forth. The front and rear ring members 6A, 6A, which are disposed at predetermined intervals in the circumferential direction, and whose front and rear end faces are provided at regular intervals in the circumferential direction.
Bolts 64 are connected to the bolt holes of the so that they can be removed sequentially. Further, the arc-shaped frame member 6b2 is sequentially interposed between the front end portions and the rear end portions of the horizontal frame members 6b1 and 6b1 which are adjacent in the circumferential direction, and the both end surfaces thereof are detachably connected by bolts 65 to form a ring. Forming a reinforcing frame portion.
Further, similar to the split ring piece 6a 'arranged at the top of the ring member 6A, among the arc-shaped frame members 6b2, the arc-shaped frame member 6b2' arranged at the top is replaced by another arc-shaped frame member 6b2. In order to make it possible to insert and remove in the radial direction in the assembled state, both the joint end faces in the circumferential direction are inclined outward toward the inner peripheral side so that the reinforcing frame body 6B can be easily assembled and disassembled. Is configured.

The reaction force receiving means 6 composed of the reinforcing frame 6B and the ring member 6A receives the propulsion reaction force of the tunnel excavator A when the tunnel excavator A is moving forward, and the tunnel excavator A in the front pipe P is excavated. 1 and 3 between the rear end inner peripheral surface of the excavator main body 1 and the front end inner peripheral surface of each horizontal support member 6b1 of the reinforcement frame 6B in the reaction force receiving means 6. A plurality of direction correcting jacks 7 are connected to each other, and a propulsive reaction force acting on the excavator main body 1 via the direction correcting jacks 7 is supported by the reinforcing frame 6B. In this case, the horizontal support members 6b1 of the reinforcing frame body 6B are assembled at intervals equal to the circumferential interval of the direction correction jacks 7 and so as to face the direction correction jacks 7 in the front-rear direction and the direction correction jacks 7 A connecting plate 9 is attached to the rear end of the horizontal supporting member 6b1 and is detachably fixed to the inner surface of the front end of the horizontal supporting member 6b1 by bolts.

It should be noted that the excavator body 1 is provided with a direction correction jack 7
Directly without supporting the reaction force receiving means 6 through
It may be configured to be supported by the reaction force receiving means 6. FIG. 7 shows an example thereof, in which a plurality of reaction force receiving means 6 are provided so as to be able to be pulled out only between the front ring member 6A, that is, between the joint end faces of the leading pipe body P and the succeeding pipe body P1. Only the ring member 6A composed of the split ring piece 6a is provided, and the rear end face of the excavator body 1 is brought into contact with and received by the front surface of the inner peripheral portion of the ring member 6A that projects inward from the pipe P. It is a structure.

On the other hand, the front end side of the excavator body 1 is fixed to the front end face of the leading pipe body P. As shown in FIGS. 1 and 7, this fixing structure has an outer diameter substantially equal to the outer shape of the pipe body P and an inner diameter smaller than the inner diameter of the pipe body P on the front end surface of the leading pipe body P. An annular end plate 8 having an inner peripheral portion projecting inward of the pipe P is applied and detachably fixed to the front end face of the pipe P by a bolt 81 from the front side. At the same time, the rear surface of the inner peripheral portion of the end plate 8 projecting inward from the front end surface of the pipe body P is brought into contact with the front end surface of the excavator body 1, and the front end surface of the excavator body 1 is bolted from the front side. ,
That is, the outer peripheral portion of the partition plate 2 is fixed to the inner peripheral portion of the end face plate 8.

Next, a method of forming the conduit D between the starting shaft B and the reaching shaft C by the tunnel excavator constructed as described above will be explained. First, the pipe P to be buried first
The tunnel excavator A is provided inside the front end face of the excavator main body 1 and the end face plate 8 is fixed to the front end face of the pipe body P in a non-rotating state as described above, and the rear end of the excavator main body 1 is used as the reaction force receiving means 6. A plurality of pipes P in which the tunnel excavator A is installed and the succeeding pipe P1 are installed in the starting shaft B, and the rear end surface of the succeeding pipe P1 is arranged in the starting shaft B in a supported state. The propulsion jack 11 of the book is extended and propelled, and the cutter head 3 is rotated and driven toward the reaching shaft C. At this time, the front ground of the tunnel excavator A is excavated by the cutter head 3, and the arm 34 of the cutter head 3 is excavated.
The movable ground member 36 is projected from the above to excavate the ground in front of the pipe P.

After propelling the pipe P containing the tunnel excavator A by the propulsion jack 11, the succeeding pipe P1 is connected in series to this pipe P to propel the succeeding pipe P1. May be promoted by 11. In this case, the end face of the pipe body P and the rear end face of the excavator main body 1 are simultaneously pushed by the propulsion jack 11 to propel the cutter head 3 into the ground while rotating the cutter head 3 and then the succeeding pipe body P1 to the top. After joining and connecting to the rear end surface of the pipe body P, the reaction force receiving means 6 is attached to the succeeding pipe body P1 and the rear end portion of the excavator body 1 is supported by the reaction force receiving means 6. , The rear end surface of the succeeding pipe body P1 is pushed forward by the propulsion jack 11.

The leading pipe body P and the succeeding pipe body P1 are connected to each other in the form of a short cylinder having a ring-shaped partition plate portion 12a integrally formed on the inner peripheral surface with a protruding width equal to the wall thickness of the pipe body P. Made by color 12. That is, as shown in FIG. 6, the inner peripheral surface of the front half portion of the collar 12 is fitted with the peripheral stepped portion 13 provided on the outer peripheral surface of the rear end portion of the leading pipe body P through the seal material 14 so that the pipe is The rear end surface of the body P is brought into contact with the front surface of the partition plate portion 12a, while the collar 12
The inner peripheral surface of the latter half of the inner peripheral surface of the rear tubular body P1 is fitted with the peripheral stepped portion 13 provided on the outer peripheral surface of the front end portion of the rear tubular body P1 through the sealing material 14.

At the time of connecting the succeeding pipe P1, the outer peripheral portion of the ring member 6A of the reaction force receiving means 6 is superposed on the rear surface of the collar 12, and the succeeding pipe P1 is formed on the rear surface of the outer peripheral portion of the ring member 6A.
The ring members by abutting the tip surfaces of the
The partition plate of the collar 12 allows 6A to be pulled inward.
It is interposed between the tip surface of 12a and the succeeding tubular body P1.

Further, when the reinforcing frame 6B is used as the reaction force receiving means 6 together with the ring member 6A, the succeeding tubular body P1
After bringing the front surface of the outer peripheral portion of the ring member 6A into contact with the rear end surface of the ring member, the peripheral step portion provided on the outer peripheral surface of the rear end portion of the succeeding tubular body P1.
By fitting the front half of the collar 12 having the above-mentioned shape to 13 and superposing the front surface of the partition plate portion 12a on the rear surface of the outer peripheral portion of the ring member 6A, the ring member is formed by the rear end surface of the succeeding tubular body P1 and the collar 12. Hold 6A inward so that it can be pulled out.

In this state, a plurality of horizontal support members 6b1 are circumferentially provided between the front and rear ring members 6A, 6A projecting inward from the front and rear end faces of the succeeding tubular body P1, between the inner peripheral facing surfaces as described above. After arranging at predetermined intervals and fixing both end surfaces to the inner peripheral parts of the front and rear ring members 6A, 6A with bolts 64, the arc-shaped frame member 6b2 is provided between the front end parts of the adjacent horizontal support members 6b1, 6b1 and the rear part. The end portions are sequentially connected by bolts 65, and then the direction correcting jack 7 is connected by a bolt to the inner peripheral surface of the front end portion of each horizontal support member 6b1 via a connecting plate 9. Then, after the succeeding pipe body P1 is inserted into the tunnel excavated by the tunnel excavator A from the starting port, the succeeding pipe body P1 is provided with the next pipe body P2 on the outer peripheral surface of its front end portion. Connection is made by inserting 13 into the latter half of collar 12.

In this way, the rear end face of the pipe body P1 following the leading pipe body P in which the tunnel excavator A is installed is pushed by the extension of the propulsion jack 11 from the starting shaft B to propel the pipe body. Meanwhile, the cutter head 3 of the tunnel excavator A excavates a tunnel T having a diameter into which the pipe body can be inserted, and after excavating a tunnel of a certain length, a new pipe body P'is added through the collar 12, As shown, a pipe line is formed by a plurality of pipe body rows connected in series.

At this time, the propulsive reaction force of the row of pipes by the propulsion jack 11 acts in the direction of retracting the excavator body 1 via the cutter head 3, and this propulsion reaction force is mounted on the side of the succeeding pipe body P1. It is firmly received by the front end face of the succeeding tubular body P1 via the ring member 6A of the reaction force receiving means 6. That is,
When the rear end surface of the excavator body 1 is directly supported by the front surface of the inner peripheral portion of the ring member 6A interposed between the opposed end surfaces of the leading pipe body P and the succeeding pipe body P1, this ring member is used. Propulsion reaction force can be supported on the succeeding pipe body P1 via 6A, and the rear end of the excavator body 1 is horizontally supported on the reinforcing frame body 6B of the reaction force receiving means 6 via a plurality of direction correcting jacks 11. Member 6b1
When it is connected to the ring member 6A, it can be supported by the ring member 6A via the direction correcting jack 11 and the horizontal supporting member 6b1.

As shown in FIG. 9, the leading pipe body P which houses the tunnel excavator A reaches the reaching shaft C and a large number of pipe bodies are connected in series between the starting shaft B and the reaching shaft C. When the pipeline is formed, the tunnel excavator A is collected and removed. To recover and remove the tunnel excavator A, first, the movable arm member 36 projecting from the outer peripheral surface of the cutter head 3 is immersed in the arm 34 of the cutter head 3, and then the leading pipe from the reaching shaft C is reached. The end face plate 8 fixed to the front end face of the body P and the front end face of the excavator body 1 is fixed to the bolt 81,
82 is removed by removing it, and then removed upward through the reaching shaft C.

Further, when the rear end of the excavator body 1 is supported only by the ring member 6A of the reaction force receiving means 6 as shown in FIG. 7, the ring member 6A is connected to the leading pipe body P. The excavator body 1 is extracted from between the end faces facing the succeeding pipe P1.
Is the front and rear ring members 6A, 6A of the reaction force receiving means 6 as described above.
When the ring member 6A is supported via the reinforcing frame body 6B assembled in between, the connecting plate 9 of the direction correcting jack 11 is detached from each horizontal support member 6b1 and the space between the adjacent horizontal support members 6b1, 6b1. Arc frame material 6b2 connecting
After sequentially removing, all horizontal support members 6b1 are removed from the front and rear ring members 6A, 6A, and then the front and rear ring members 6A, 6A are removed.

Then, the gap between the end faces of the front and rear pipes formed in the trace of the extracted ring member 6A is eliminated by pushing the pipe row from the starting shaft B side by the above-mentioned propulsion jack 11, and the space between the opposite end faces of the pipes is eliminated. Partition part 12a of color 12
To be sandwiched.

In this way, after the support member 6 is disassembled and removed, the excavator body 1 of the tunnel excavator A is towed from the starting shaft B side by a wire rope or the like, and a guide is provided on the lower peripheral portion of the excavator body 1. Collect the tunnel excavator A in the starting shaft B while rolling the roller 10 on the inner bottom surface of the pipeline,
It will be removed through the starting shaft B.

[0043]

As described above, according to the pipe excavating tunnel excavator of the present invention, as described in claim 1, while excavating the tunnel in the ground, the succeeding pipes are sequentially driven into the tunnel. A tunneling device that is a drilling device that forms a pipe line by being buried and has an outer diameter smaller than the inner diameter of the pipe body and is installed in the first pipe body so that it can be removed backward through the pipe line. The body of the excavator, a cutter head that is rotatably supported by the excavator body, and protrudes forward from the opening end of the leading pipe body, a drive mechanism for the cutter head, and a rear portion of the excavator body. And a reaction force receiving means for receiving the propulsive reaction force of the tunnel excavator, and this reaction force receiving means is composed of a ring member that is detachably interposed between the joint end faces of the adjacent pipes. , Propulsion when burying pipes The force can be more firmly received by the front end face of the succeeding tubular body facing the direction in which the propulsion reaction force acts through the ring member which is the reaction force receiving means, and the tunnel excavator can smoothly move without retreating. You can dig a tunnel from the starting shaft to the reaching shaft.

Further, since the ring member is not fixed to the pipe body by bolts but is simply inserted between the joint end faces of the adjacent pipe bodies so as to be able to be pulled out, the mounting work can be easily performed and the ring member can be removed. Work can be performed easily and work efficiency is improved, and ring members can be attached and tunnel excavators can be excavated without damaging or missing the pipe body, and moreover, there are a large number between the starting shaft and the reaching shaft. After the pipe is formed by burying the pipe body of the book, the ring member can be removed to easily collect the tunnel excavator on the side of the starting shaft through the pipe.

According to the second aspect of the present invention, the ring member is composed of a combination of a plurality of split ring pieces curved in an arc shape in the circumferential direction of the conduit, and at least one of the split ring pieces. One piece has a structure in which both joint end surfaces in the circumferential direction are inclined outward as they go toward the inner peripheral side, and this ring member is interposed between the joint end surfaces between adjacent front and rear pipe bodies so that the outer peripheral portion can be removed. Because,
It is easy to handle, and the interposing between the front and rear pipes, the assembling work, and the extracting and disassembling work after forming the pipe line can be performed easily and smoothly.

Further, in the invention according to claim 3, in the reinforcing frame, the front and rear end surfaces are detachably connected to the opposing surfaces of the inner peripheral portions of the front and rear ring members projecting into the pipeline, and the circumference of the pipeline is surrounded. The ring member is composed of a plurality of horizontal frame members arranged at predetermined intervals in the direction and a plurality of arcuate frame members detachably connected between the facing surfaces of the adjacent horizontal support members. The reinforcing frame can be mounted on the pipe without bolting it to the pipe, and therefore the pipe wall is not damaged, and the reaction force that can firmly support the above-mentioned propulsion reaction force. The receiving means can be configured, and the removal work can be easily performed.

In the invention according to claim 4, the rear end of the excavator main body and the reinforcing frame are connected by a plurality of direction correcting jacks, and the front end of the excavator main body is as described in claim 5. In addition, since it is detachably connected to the end face plate fixed to the front end face of the leading pipe body with bolts, when the direction correction jack is operated to correct the direction, the excavator body is installed inside the leading pipe body. In spite of this, the tunnel excavator together with this pipe can be tilted in a predetermined direction with the front end face of the succeeding pipe as a fulcrum, and the direction can be surely corrected. Rolling can be reliably prevented by the leading tube body via the end plate.

Further, since the hood portion is provided on the outer peripheral edge of the end plate so as to project forward, the earth and sand excavated by the cutter head can be stored in the hood portion and smoothly carried out to the inside of the machine. You can

According to the invention of claim 6, the outer diameter of the cutter head is formed to be smaller than the inner diameter of the conduit, and a cutter tooth radially protruding and retracted from the outer circumference of the cutter head is formed in the cutter head. Since it is provided, it is possible to surely excavate a tunnel having a diameter through which the pipe body can enter by projecting the cutter tooth during excavation, and when the tunnel excavator reaches the reaching vertical shaft, this cutter By immersing the tooth and removing the end face plate and the reaction force receiving means, the tunnel excavator can be easily recovered on the starting shaft side through the pipeline.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a tunnel excavation device,

FIG. 2 is a front view of a cutter head,

FIG. 3 is a vertical sectional side view of a supporting member,

FIG. 4 is a vertical sectional front view of the reinforcing frame portion,

FIG. 5 is a front view showing a state in which a half portion of a ring member is cut away,

FIG. 6 is an enlarged vertical side view showing a state where a ring member is interposed between the pipes,

FIG. 7 is a vertical sectional side view of a part showing another reaction force receiving structure (support member).

FIG. 8 is a simplified vertical cross-sectional side view of a state in which a pipe line is formed,

FIG. 9 is a simplified vertical cross-sectional side view showing a state where a pipeline is formed between the starting shaft and the reaching shaft.

FIG. 10 is a simplified vertical sectional side view showing a state where the tunnel excavator is being recovered.

[Explanation of symbols]

A tunnel excavator P tube 1 excavator body 3 cutter head 4 drive mechanism 6 Reaction force receiving means 6A ring member 6a split ring piece 6B reinforcement frame 6b1 Horizontal support member 6b2 Arc frame material 7 direction correction jack 8 End plate 11 propulsion jack 12 colors

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junji Ono             2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi             Inside the Okumura group F term (reference) 2D054 AC18 BA03 BB09 DA03 EA05

Claims (6)

[Claims] 1. A tunnel excavator that excavates a tunnel in the ground to form a pipe line by sequentially propelling and burying subsequent pipes in the tunnel, the outer diameter of which is smaller than the inner diameter of the pipe. And the main body of the tunnel excavator that is disposed in the front pipe body so that it can be removed backward through the pipe line, and from the open end of the front pipe body that is rotatably supported by the main body of the excavator machine. It consists of a cutter head protruding forward, a drive mechanism for this cutter head, and a reaction force receiving means arranged behind the excavator body for receiving the propulsion reaction force of the tunnel excavator. Is a tunnel excavator for forming a pipe line, which is composed of a ring member that is detachably interposed between joint end faces of adjacent pipe bodies. 2. The ring member is formed by combining a plurality of divided ring pieces curved in an arc shape in the circumferential direction of the pipe line, and at least one of the divided ring pieces has an inner periphery on both joint end surfaces in the circumferential direction. The ring member is shaped to incline outward as it goes to the side, and the outer peripheral portion of this ring member is interposed between the joint end faces of the adjacent front and rear pipe bodies so that the inner peripheral portion protrudes inward from the pipe body. The tunnel excavator for forming a pipeline according to claim 1, wherein the excavator main body receives the rear end thereof. 3. The ring members are respectively arranged in front of and behind the pipe body connected to the leading pipe body, and a reinforcing frame body is provided between the facing surfaces of the inner peripheral portions of the front and rear ring members protruding into the pipe body. The reinforcing frame is detachably connected to the opposing surfaces of the inner peripheral portions of the front and rear ring members that project into the duct, and the reinforcing frame is detachably connected at predetermined intervals in the circumferential direction of the duct. 3. A plurality of horizontal frame members arranged and a plurality of arc-shaped frame members detachably connected between facing surfaces of adjacent horizontal support members. A tunnel excavator for forming a pipeline as described. 4. The pipeline according to claim 1, wherein the rear end of the excavator body and the reinforcing frame are connected by a plurality of direction correcting jacks. Forming tunnel excavator. 5. An annular end plate is removably fixed to the front end face of the leading pipe body in the pipe line, and a hood portion is provided on the outer peripheral edge of the end plate so as to project forward, and Rolling of the tunnel excavator is prevented by projecting the peripheral portion inward from the inner peripheral surface of the pipe body and connecting the front end surface of the excavator main body of the tunnel excavator to the rear surface thereof with bolts in a detachable manner. The tunnel excavator for forming a pipeline according to claim 1. 6. An outer diameter of the cutter head is formed to be smaller than an inner diameter of the conduit, and a cutter tooth radially protruding and retracted from the outer circumference of the cutter head is arranged on the cutter head. The tunnel excavator for forming a pipeline according to claim 1.