JP3784317B2 - Tunnel excavator for pipe formation - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tunnel excavator for embedding a small-diameter pipe body in the ground to form a pipe line.
[0002]
[Prior art]
Conventionally, in order to embed a small-diameter pipe such as a sewage pipe in the ground, a tunnel excavator is started from the starting shaft to the reaching shaft, and the tunnel excavator is It has been practiced to push and embed the pipe body at the rear end in succession in series, forming a pipe line. And when a pipe line is formed to a reaching shaft, it is removed by pulling up a tunnel excavator from the reaching shaft.
[0003]
However, when the reach shaft is a narrow shaft such as an existing manhole, the tunnel excavator cannot be pulled up through the reach shaft, so the tunnel excavator must be disassembled and removed and recovered. The work requires a great deal of labor and labor.
[0004]
For this reason, as described 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 head pipe body, and the cutter head is opened at the front end of the pipe body. In this state, it is fixed by crimping the end stop plate of the pressure bolt, which is threaded so as to be able to advance and retreat in the radial direction to the peripheral wall of the body portion, and is fixed to the inner peripheral surface of the tube. Each time a certain length of tunnel is excavated by driving the excavator with the pipe, a pipe is constructed by connecting the pipes in sequence, and when the tunnel excavator reaches the reach shaft, the pressure bolt is loosened and the pipe After the tunnel excavator was unfixed against the tunnel, a method of forming a pipeline was developed in which the tunnel excavator was pulled out to the start shaft through the pipeline and removed.
[0005]
[Problems to be solved by the invention]
However, according to the method for forming a pipe line, the tunnel excavator is fixed to the pipe body by pressing a pressing bolt threaded through the peripheral wall of the trunk portion to the inner peripheral surface of the pipe body. Therefore, during excavation, a large thrust reaction force acts on the pressure bolt in a direction perpendicular to the axis, and the pressure reaction force between the pressure stop bolt and the inner peripheral surface of the tube is reduced. It is difficult to receive, and this propulsion reaction force causes the retaining plate to slide backward on the inner peripheral surface of the pipe body, causing the tunnel excavator to retreat, and not being able to excavate with the cutter head. There is a problem that the head hits the front end face of the tube and the cutter head and the tube are damaged.
[0006]
Further, if the pressing bolt is pressed more than necessary against the inner peripheral surface of the tube body, the tube body may be damaged, and the pressing bolt itself may be deformed or broken by the propulsion reaction force, and the operation is continued. There was a problem that it was impossible. For this reason, it is conceivable to fix the reaction force support member to the 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 support member is provided in the pipe body. In addition, if the reaction force support member is removed when the tunnel excavator is pulled back after the pipe is formed, the bolt holes remain in the pipe body. There is a possibility that the construction becomes complicated due to the necessity of stuffing, and there is a possibility that the pipe body may be damaged by the drilling of the bolt holes.
[0007]
The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to firmly receive the propulsion reaction force acting during tunnel excavation by the end face of the tubular body facing the reaction force direction. It is another object of the present invention to provide a tunnel excavating machine for forming a pipeline that enables smooth and reliable excavation and that does not cause damage or breakage of the pipe body.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a tunnel excavator according to the present invention, as described in claim 1, squeezes a pipe line by sequentially propelling and burying a succeeding pipe body in the tunnel while excavating the tunnel in the ground. A tunnel excavator to be formed, the outer diameter of the tunnel excavator being smaller than the inner diameter of the pipe, and the main body of the tunnel excavator disposed in the top pipe so as to be removable backward through the pipe, A cutter head that is rotatably supported by the excavator body and protrudes forward from the opening end of the top pipe body, a driving mechanism for the cutter head, and a tunnel excavator disposed behind the excavator body The reaction force receiving means is constituted by a ring member that is detachably interposed between the joining end faces of the adjacent pipes.
[0009]
In the tunnel excavator, the invention according to claim 2 is characterized in that the ring member is formed by a combination of a plurality of split ring pieces curved in an arc shape in the circumferential direction of the pipe line, and of the split ring pieces, At least one piece has a shape in which both side joining end faces in the circumferential direction are inclined outwardly toward the inner circumference side, and this ring member is interposed between the joining end faces between adjacent front and rear pipe bodies so that the outer circumference can be extracted. The rear end of the excavator main body is received by the inner peripheral portion protruding inward from the tube body.
[0010]
Furthermore, in the invention according to claim 3, the ring members are disposed on the front and rear sides of the tubular body connected to the leading tubular body, and between the opposing surfaces of the inner peripheral portion protruding into the tubular body in these front and rear ring members. Reinforcing frame members are interposed and connected to each other, and the reinforcing frame members are detachably connected to opposite surfaces of the inner peripheral portion protruding into the pipe line in the front and rear ring members, and the circumferential direction of the pipe line Multiple horizontal lines arranged at predetermined intervals Support member And a plurality of arcuate frame members detachably connected between opposing surfaces of adjacent horizontal support members.
[0011]
In the invention according to claim 4, the rear end of the excavator body is not directly supported by the reinforcing frame, but the rear end of the excavator body is connected to the reinforcing frame via a plurality of direction correcting jacks. The structure is linked.
[0012]
The invention according to claim 5 is a rolling preventing means for the excavator body, wherein an annular end face plate is detachably fixed to the front end face of the leading pipe body in the pipe, and the front end face of the end face plate is moved forward. The hood part is projected toward the inner side, the inner peripheral part protrudes inward from the inner peripheral surface of the tubular body, and the front end surface of the excavator body is detachably connected to the rear surface by a bolt. It has a structure.
[0013]
The invention according to claim 6 is the structure of the cutter head, wherein the outer diameter of the cutter head is formed smaller than the inner diameter of the pipe line, and the cutter teeth that appear and disappear radially from the outer periphery are arranged. It is characterized by having installed.
[0014]
[Action]
The pipe body in which the main body of the tunnel excavator is housed is propelled from the start shaft into the ground, and the tunnel is dug while the cutter head protruding from the opening front end of the pipe body is rotated. At this time, the cutter tooth is protruded from the outer periphery of the cutter head to excavate a tunnel having a diameter that allows the tube to enter and embed. The tube is propelled by extending the propulsion jack installed in the starting shaft, and every time a tunnel with a length equal to the length of one tube is excavated, the next tube is A pipe line is formed in the ground by repeating the subsequent operation of pushing the rear end face of the pipe body with a propulsion jack.
[0015]
When digging with a tunnel excavator while pushing the tube, the propulsion reaction force of the tube acts on the excavator body via the cutter head, but the rear end of the excavator body is supported by a ring member. Since the ring member is interposed between the joining end faces of the adjacent pipes, the propulsion reaction force is received by the front end face of the succeeding pipe body facing in the direction in which the propulsion reaction force acts. Therefore, the propulsion reaction force is firmly received by the pipe body, and the tunnel excavator does not move backward, and further, the pipe body can be smoothly dug without being damaged.
[0016]
Further, the ring member is disposed before and after the pipe body following the leading pipe body, and the reinforcing frame body is interposed on the opposing surfaces of the inner peripheral portions protruding into the pipe lines of the front and rear ring members. A plurality of horizontal lines arranged at predetermined intervals in the circumferential direction of the pipeline in the reinforcing frame Support member Is removably connected to the opposing surfaces of the front and rear ring members, and the adjacent horizontal support members are connected by an arcuate frame material, so that the ring member and the reinforcing frame body can be strengthened without bolting to the tube body. The reaction force receiving means can be formed, so that the tube wall is not damaged and the removal operation can be easily performed.
[0017]
Furthermore, if an end face plate is attached to the front end face of the pipe and the front end face of the excavator body is connected to the end face plate with a bolt, the excavator body rolling due to the rotational reaction force of the cutter head is prevented. can do.
[0018]
The excavator main body may have its rear end face directly received by the ring member, but a plurality of direction correcting jacks are provided between the rear end of the excavator main body and the reinforcing frame body of the reaction force receiving means. If they are connected, the direction of the pipeline can be corrected and the curved pipeline can be easily formed.
[0019]
When the tunnel excavator reaches the reach shaft, the cutter tooth excavating the front of the pipe body in the cutter head is immersed in the cutter head, and after the connection between the excavator body and the ring member or the reinforcing frame is released, these The ring member and the reinforcing frame are removed to the start shaft side through the pipeline. In addition, instead of the cutter tooth excavating the front of the tube body, an annular outer peripheral cutter member may be detachably attached to the outer periphery of the cutter head. In this case, the cutter member is passed through the reaching shaft. Remove. Further, as described above, if the ring member is formed by a combination of a plurality of divided ring pieces, it is possible to easily perform the extraction operation from between the joining end surfaces of the tubular bodies. 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 pulled back to the start shaft side through the pipeline and removed and collected.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Next, a specific embodiment of the present invention will be described with reference to the drawings. The tunnel excavator A has a length shorter than the pipe length of the first pipe body P to be embedded, which is made of a fume pipe, and has an outer diameter. A cylindrical body-shaped excavator body 1 formed with a diameter smaller than the inner diameter of the tube P, and a disk-shaped excavator body 1 that is integrally fixed to the opening front end of the excavator body 1 and closes the opening front end. A partition plate 2, a cutter head 3 that is rotatably inserted and supported in the central portion of the partition plate 2, and whose outer diameter is smaller than the inner diameter of the tubular body P; A drive mechanism 4 equipped with a motor 4a that is mounted on the back surface of the plate 2 and rotationally drives the cutter head 3, and a front end opening portion faces the lower back surface of the cutter head 3 that penetrates the lower end portion of the partition plate 2. The earth and sand discharging means 5 is provided.
[0021]
The earth and sand discharging means 5 is constituted by a screw conveyor in which a screw 5b is rotatably disposed in a cylindrical casing 5a, and excavated in a state inclined obliquely upward from the front end toward the rear end. The machine main body 1 is supported by a support rod 6. 5c is a rotary drive motor for the screw 5b, and 5d is a sediment discharge port that is opened and closed by an opening / 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 that can roll on the inner bottom surface of the pipe body P at the lower peripheral portion thereof, and on the inner bottom surface of the pipe body P via the guide roller 10. It is supported by.
[0022]
The cutter head 3 projecting forward from the partition plate 2 of the excavator body 1 has an annular shape in which the central drive shaft 3a and the outer diameter are smaller than the inner diameter of the tube P as shown in FIG. The arm 32 having a plurality of scraper teeth 31 projecting forward from the peripheral frame 3b and the arm 34 having a plurality of cutter bits 33 projecting alternately are intermediate in the circumferential direction. Radially arranged from the drive shaft 3a, the outer ends of these arms 32, 34 are integrally fixed to the peripheral frame 3b, and the arm 34 projecting the cutter bit 33 is formed hollow. A movable arm member 36 provided with a cutter tooth 35 protruding in the extending direction of the arm 34 from the outer periphery of the cutter head 3, that is, the peripheral frame 3b, is housed in the hollow of the cutter.
[0023]
As shown in FIG. 1, the movable arm member 36 is provided with a jack 37 in the arm 34, and the rod tip of the jack 37 is connected to the movable arm member 36 to expand and contract the rod. In other words, the movable arm member 36 is projected from the cutter head 3 when it is extended to excavate the front ground of the top tubular body P.
[0024]
Further, the rear end of the excavator main body 1 disposed in the head pipe P is a reaction force receiver mounted on the rear pipe P1 side where the front end face is connected to the rear end face of the pipe P in abutting manner. Connected to and supported by means 6. The reaction force receiving means 6 includes a ring member 6A that is detachably interposed between joint end surfaces of adjacent pipe bodies in the front and rear directions, and a reinforcing frame body 6B that is detachably attached to the ring member 6A. As shown in FIGS. 3, 5 and 6, 6A is an annular shape having a constant thickness whose outer diameter is equal to or slightly smaller than the outer diameter of the tube P, and whose inner diameter is smaller than the inner diameter of the tube P. The inner peripheral portion of the steel plate P protrudes from the inner peripheral surface of the tubular body P into the tunnel T.
[0025]
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 tube P, and each split ring piece 6a , 6a has a plurality of reinforcing ribs 61 projecting at regular intervals in the circumferential direction on one side of the inner peripheral portion projecting inward from the tube P, and the split ring pieces are connected to both ends by bolts 63. A flange 62 provided with a bolt hole for connection is projected, and the front and rear end faces of the horizontal support member 6b1 of the reinforcing frame 6B are connected by bolts 64 to the inner peripheral side center of each split ring piece 6a. Bolt holes are provided for this purpose. Further, among the divided ring pieces 6a, 6a, the ring piece 6a 'disposed at the top of the ring piece 6a is arranged so that the ring member 6A can be easily assembled and disassembled. In a state assembled between the joining end faces, the both end joining end faces in the circumferential direction are inclined outwardly toward the inner peripheral side so that they can be inserted and removed in the radial direction.
[0026]
The ring member 6A configured as described above is formed between the joint end surface of the head pipe P that houses the excavator body 1 and the pipe body P1 that follows the pipe body P, the subsequent pipe body P1, The outer peripheral portion is interposed between the joining end faces of the next pipe body P2 connected to the succeeding pipe body P1 so as to be extracted.
[0027]
On the other hand, as shown in FIGS. 3 and 4, the reinforcing frame 6B has a plurality of horizontal frames having substantially the same length as that of the succeeding tubular body P1. Support member 6b1 and horizontal adjacent to the circumferential direction Support member 6b1 and 6b1 and a plurality of arc-shaped frame members 6b2 connecting the horizontal Support member The front and rear ring members 6b1 are disposed and arranged at predetermined intervals in the circumferential direction between the inner peripheral portions of the ring members 6A and 6A opposed to the front and rear, and the front and rear end surfaces thereof are provided at regular intervals in the circumferential direction. The bolt holes of 6A and 6A are detachably connected by bolts 64 in sequence. In addition, the arc-shaped frame member 6b2 Support member A ring-shaped reinforcing frame portion is formed by sequentially interposing between the front end portion and the rear end portion of 6b1 and 6b1 and detachably connecting the both end faces with bolts 65. Similarly to the split ring piece 6a ′ disposed at the top of the ring member 6A, the arc-shaped frame member 6b2 ′ disposed at the top of the arc-shaped frame member 6b2 is replaced by another arc-shaped frame member 6b2. In order to enable easy assembly and disassembly of the reinforcing frame 6B by making the joint end surfaces in the circumferential direction inclined outward toward the inner peripheral side so that it can be inserted and removed in the radial direction in the assembled state. It is configured.
[0028]
The reaction force receiving means 6 composed of the reinforcing frame 6B and the ring member 6A receives the propulsion reaction force during the excavation of the tunnel excavator A and prevents the tunnel excavator A from retreating in the top pipe P. In FIG. 1 and FIG. 3, there are a plurality of pieces between the inner peripheral surface of the rear end portion of the excavator body 1 and the inner peripheral surface of the front end portion of each horizontal support member 6 b 1 of the reinforcing frame 6 B in the reaction force receiving means 6. A direction correcting jack 7 is connected, and a propulsion reaction force acting on the excavator main body 1 via the direction correcting jack 7 is supported by the reinforcing frame 6B. In this case, each horizontal support member 6b1 of the reinforcing frame 6B is assembled at intervals equal to the circumferential arrangement interval of the direction correction jack 7 and is opposed to each direction correction jack 7 in the front-rear direction, and the direction correction jack 7 A connecting plate 9 is attached to the rear end, and this connecting plate 9 is detachably fixed to the inner surface of the front end portion of the horizontal support member 6b1 with bolts.
[0029]
The excavator body 1 may be directly supported by the reaction force receiving means 6 without being supported by the reaction force receiving means 6 via the direction correcting jack 7. FIG. 7 shows an example, and a plurality of reaction force receiving means 6 are detachably interposed between only the front ring member 6A, that is, between the joining end faces of the leading tube P and the succeeding tube P1. The ring member 6A is composed only of the split ring piece 6a, and the rear end surface 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 protruding inward from the pipe P. It is a structure.
[0030]
On the other hand, the front end side of the excavator main body 1 is fixed to the front end surface of the leading tubular body P. As shown in FIGS. 1 and 7, this fixing structure has an outer diameter substantially equal to the outer shape of the tubular body P on the front end surface of the leading tubular body P, and the inner diameter is smaller than the inner diameter of the tubular body P. An annular end face plate 8 formed so that the inner peripheral portion protrudes inward of the pipe body P is applied and fixed to the front end face of the pipe body P by a bolt 81 from the front side. At the same time, the rear surface of the inner peripheral portion of the end face plate 8 projecting inwardly from the front end face of the tube P is brought into contact with the front end face of the excavator body 1 and the front end face of the excavator body 1 from the front side by the bolts 82. That is, the outer peripheral portion of the partition plate 2 is fixed to the inner peripheral portion of the end face plate 8.
[0031]
Next, a method for forming the pipeline D between the start shaft B and the arrival shaft C using the tunnel excavator configured as described above will be described. First, the tunnel excavator A is disposed in the pipe P to be buried first, and the front end face of the excavator body 1 is fixed to the front end face of the pipe P by the end face plate 8 as described above. At the same time, the rear end is supported by the reaction force receiving means 6, and the pipe body P and the subsequent pipe body P1 in which the tunnel excavator A is installed are installed in the start shaft B, and the rear end face of the subsequent pipe body P1. Is propelled by extending a plurality of propulsion jacks 11 arranged in the start shaft B, and the cutter head 3 is rotated toward the reaching shaft C while rotating. At this time, the front ground of the tunnel excavator A is excavated by the cutter head 3, and the movable arm member 36 is projected from the arm 34 of the cutter head 3 to excavate the front ground of the pipe body P.
[0032]
In addition, after propelling the pipe P in which the tunnel excavator A is installed by the propulsion jack 11, the subsequent pipe P1 is connected to the pipe P in series, and the subsequent pipe P1 is propelled by the propulsion jack 11. You may let them. In this case, the end face of the tubular body P and the rear end face of the excavator main body 1 are simultaneously pushed by the propulsion jack 11 and propelled from the starting port into the ground while rotating the cutter head 3, and then the succeeding tubular body P1 is moved to the top. After joining and connecting to the rear end surface of the pipe P, the reaction force receiving means 6 is attached to the subsequent pipe P1, and the rear end of the excavator body 1 is supported by the reaction force receiving means 6. Then, the rear end face of the succeeding pipe body P1 is pushed forward by the propulsion jack 11.
[0033]
The connection between the leading tubular body P and the succeeding tubular body P1 is made by a short cylindrical collar 12 integrally provided with a ring-shaped partition plate portion 12a having a protruding width equal to the thickness of the tubular body P on the inner peripheral surface. Done. That is, as shown in FIG. 6, a circumferential step portion 13 provided on the outer peripheral surface of the rear end portion of the leading tubular body P is fitted on the inner peripheral surface of the front half portion of the collar 12 via a sealing material 14 and the tube 12 is inserted. While the rear end surface of the body P is brought into contact with the front surface of the partition plate portion 12a, the circumferential step portion 13 provided on the outer peripheral surface of the front end portion of the succeeding tubular body P1 is provided on the inner peripheral surface of the rear portion of the collar 12 through the sealing material 14 as well. This is done by fitting them inside.
[0034]
At the time of connection of the succeeding tubular body P1, the outer peripheral portion of the ring member 6A of the reaction force receiving means 6 is superimposed on the rear surface of the collar 12, and the front end surface of the subsequent tubular body P1 is abutted against the rear surface of the outer peripheral portion of the ring member 6A. In this manner, the ring member 6A is interposed between the partition plate portion 12a of the collar 12 and the distal end surface of the succeeding tubular body P1 so that the ring member 6A can be extracted inward.
[0035]
Furthermore, when the reinforcing frame 6B is used as the reaction force receiving means 6 together with the ring member 6A, the rear end surface of the subsequent tubular body P1 is brought into contact with the front surface of the outer peripheral portion of the ring member 6A, and then the subsequent tubular body P1. By fitting the front half of the collar 12 having the above-mentioned shape to the circumferential step 13 provided on the outer peripheral surface of the rear end portion and superimposing 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 6A is clamped between the rear end face of the body P1 and the collar 12 so as to be able to be pulled out inward.
[0036]
In this state, as described above, the plurality of horizontal support members 6b1 are arranged at predetermined intervals in the circumferential direction between the inner peripheral facing surfaces of the front and rear ring members 6A and 6A protruding inward from the front and rear end surfaces of the succeeding tubular body P1. Are fixed to the inner peripheral portion of the front and rear ring members 6A and 6A with bolts 64, and then the arc-shaped frame member 6b2 is placed between the front end portion and the rear end portion of the adjacent horizontal support members 6b1 and 6b1. Then, the bolts 65 are sequentially connected to each other, and then the direction correcting jack 7 is connected to the inner peripheral surface of the front end portion of each horizontal support member 6b1 via the connecting plate 9 with the bolts. Then, after the succeeding tube P1 is inserted into the tunnel excavated by the tunnel excavator A from the starting port, the subsequent tube P1 is provided with the next tube P2 on the outer peripheral surface of the front end thereof. Connect 13 by inserting it into the rear half of collar 12.
[0037]
In this way, tunnel excavation is carried out while pushing the rear end face of the pipe P1 following the head pipe P in which the tunnel excavator A is installed by the extension of the propulsion jack 11 from the start shaft B side to propel the pipe. As shown in FIG. 8, a tunnel T having a diameter into which the pipe can be inserted is dug by the cutter head 3 of the machine A, and a new pipe P ′ is added through the collar 12 after excavation of the fixed length tunnel. Then, a pipe line composed of a plurality of tube bodies connected in series is formed.
[0038]
At this time, the propulsion reaction force of the tube row 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 attached to the succeeding tube body P1 side. It is firmly received by the front end face of the succeeding pipe body P1 through 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 on the inner peripheral front surface of the ring member 6A interposed between the opposed end surfaces of the leading tube P and the succeeding tube P1, The propulsion reaction force can be supported by the succeeding tube body P1 via the ring member 6A, and the rear end of the excavator body 1 is connected to the reinforcement frame 6B of the reaction force receiving means 6 via a plurality of direction correcting jacks 11. When connected to the horizontal support member 6b1, the ring member 6A can be supported via the direction correcting jack 11 and the horizontal support member 6b1.
[0039]
As shown in FIG. 9, the top pipe body P that houses the tunnel excavator A reaches the arrival shaft C, and a large number of tubes are connected in series between the start shaft B and the arrival shaft C. When the pipeline is formed, the tunnel excavator A is recovered and removed. The tunnel excavator A is recovered and removed by first immersing the movable arm member 36 protruding from the outer peripheral surface of the cutter head 3 into the arm 34 of the cutter head 3, and then the leading pipe from the reaching shaft C. The end face plate 8 fixed to the front end face of the body P and the front end face of the excavator main body 1 is removed by pulling out the bolts 81 and 82, and is removed upward through the reach shaft C.
[0040]
Furthermore, 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 tube P and the succeeding tube. The excavator body 1 is extracted from between the end faces facing P1 and supported by the ring member 6A via the reinforcing frame 6B assembled between the front and rear ring members 6A, 6A of the reaction force receiving means 6 as described above. In this case, the connecting plate 9 of the direction correcting jack 11 is removed from each horizontal support member 6b1, and the arcuate frame member 6b2 connecting the adjacent horizontal support members 6b1 and 6b1 is sequentially removed, and then all the horizontal plates are removed. The support member 6b1 is removed from the front and rear ring members 6A and 6A, and then the front and rear ring members 6A and 6A are extracted.
[0041]
Then, the gap between the end faces of the front and rear pipe bodies formed in the trace of the extracted ring member 6A is eliminated by pushing the pipe row from the start shaft B side by the propulsion jack 11, and the collar 12 between the opposite end faces of the pipe bodies is eliminated. The partition plate portion 12a is sandwiched.
[0042]
After dismantling and removing the support member 6 in this way, the excavator body 1 of the tunnel excavator A is pulled from the start shaft B side by a wire rope or the like, and the guide roller 10 provided on the lower periphery of the excavator body 1 is provided. The tunnel excavator A is collected in the start shaft B while being rolled to the inner bottom surface of the pipe, and is removed through the start shaft B.
[0043]
【The invention's effect】
As described above, according to the tunnel excavating machine for forming a pipeline according to the present invention, as described in claim 1, by sequentially propelling and burying the subsequent pipe body in the tunnel while excavating the tunnel in the ground. A tunnel excavator for forming a pipe, the outer diameter of which is smaller than the inner diameter of the pipe, and the main body of the tunnel excavator disposed in the top pipe so as to be removable backward through the pipe; A cutter head that is rotatably supported by the excavator body and protrudes forward from the opening end of the top tube, a drive mechanism for the cutter head, and a tunnel excavator disposed behind the excavator body The reaction force receiving means is composed of a ring member that is detachably interposed between the joining end faces of adjacent pipe bodies, so that the pipe body is buried in the reaction force receiving means. Receiving propulsion reaction force at times It can be firmly received by the front end surface of the succeeding pipe body facing the direction in which the propulsion reaction force acts through a ring member that is a step, and the tunnel shaft can be smoothly reached from the start shaft without retreating. You can dig a tunnel towards.
[0044]
Furthermore, since the ring member is not fixed to the pipe body with a bolt, but is simply detachably interposed between the joining end faces of adjacent pipe bodies, the mounting work can be easily performed and the removal work can be easily performed. In addition, the work efficiency is improved and the ring member can be mounted and tunnel excavation can be carried out without causing any damage or loss to the pipe body. In addition, a large number of pipes can be installed between the starting shaft and the reaching shaft. After forming the pipeline by burying the body, the tunnel excavator can be easily recovered to the start shaft side through the pipeline by removing the ring member.
[0045]
According to the invention of claim 2, the ring member is composed of a combination of a plurality of divided ring pieces curved in an arc shape in the circumferential direction of the pipe, and at least one of the divided ring pieces is Since the circumferentially opposite side joining end faces are inclined outwardly toward the inner circumference side, this ring member has a structure in which the outer peripheral portion is interposed between the joining end faces between the adjacent front and rear tube bodies so that it can be extracted. It is easy to handle and can be easily and smoothly carried out between the front and rear pipes, assembling work, and removing and disassembling work after forming the pipe line.
[0046]
Further, the invention according to claim 3 is characterized in that the reinforcing frame body is detachably connected to the opposite surface of the inner peripheral portion protruding into the pipe line in the front and rear ring members so that both front and rear end faces can be removed, and is predetermined in the circumferential direction of the pipe line. Multiple horizontal lines arranged at intervals Support member And a plurality of arc-shaped frame members removably connected between the opposing surfaces of the adjacent horizontal support members, so that the ring member and the reinforcing frame body can be attached to the tube body without bolting to the tube body. Therefore, it is possible to configure a reaction force receiving means that can firmly support the propulsion reaction force, and the removal work can be easily performed. It can be done.
[0047]
In the invention according to claim 4, the rear end portion 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 the leading end as described in claim 5. Since the bolt is detachably connected to the end plate fixed to the front end face of the pipe body, the excavator body is built in the top pipe body when the direction correction jack is operated to correct the direction. Nevertheless, the tunnel excavator can be tilted in a predetermined direction with the front end face of the succeeding pipe as a fulcrum together with this pipe, and the direction correction can be surely performed. This can be reliably prevented by the leading tube through the end face plate.
[0048]
In addition, since the hood portion projects forward from the outer peripheral edge of the end face plate, 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.
[0049]
According to the sixth aspect of the present invention, the outer diameter of the cutter head is formed to be smaller than the inner diameter of the pipe line, and the cutter teeth that protrude radially from the outer periphery of the cutter head are disposed on the cutter head. Therefore, when excavating, it is possible to reliably excavate a tunnel having a diameter that allows the tubular body to enter by projecting the cutter tooth. When the tunnel excavator reaches the reach shaft, the cutter tooth is immersed. In addition, by removing the end face plate and the reaction force receiving means, the tunnel excavator can be easily recovered to the start shaft side through the pipeline.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a tunnel excavator,
FIG. 2 is a front view of the cutter head,
FIG. 3 is a longitudinal side view of a support member;
FIG. 4 is a longitudinal front view of the reinforcing frame part,
FIG. 5 is a front view of a state in which half of the ring member is cut away;
FIG. 6 is an enlarged vertical side view of a state in which a ring member is interposed between pipe bodies,
FIG. 7 is a partial longitudinal side view showing another reaction force receiving structure (support member);
FIG. 8 is a simplified longitudinal sectional side view of a state in which a pipe line is formed;
FIG. 9 is a simplified vertical side view of a state in which a pipe line is formed between a starting shaft and a reaching shaft,
FIG. 10 is a simplified vertical side view showing a state where the tunnel excavator is being collected.
[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

Claims (6)

A tunnel excavator that forms a pipeline by sequentially propelling and burying the following pipes in the tunnel while excavating the tunnel in the ground, and the outer diameter is smaller than the inner diameter of the pipe. The main body of the tunnel excavator that is disposed in the head tube so as to be removable rearward through the road, and is rotatably supported by the main body of the excavator and protrudes forward from the opening end of the head tube. The cutter head comprises a cutter head drive mechanism, and a reaction force receiving means disposed behind the excavator body for receiving the driving reaction force of the tunnel excavator. A tunnel excavating machine for forming a pipeline, characterized in that it is constituted by a ring member that is detachably interposed between the joint end faces. The ring member is a combination of a plurality of split ring pieces that are curved in an arc shape in the circumferential direction of the pipe line, and at least one of the split ring pieces is outer as the both side joint end faces in the circumferential direction face the inner peripheral side. This ring member is interposed between the joint end surfaces of the adjacent front and rear pipe bodies so that the outer peripheral part can be extracted, and the inner peripheral part protruding inward from the pipe body is the rear of the excavator body. The tunnel excavating machine for forming a pipeline according to claim 1, wherein the end is received. The ring members are respectively arranged on the front and rear sides of the pipe body connected to the leading pipe body, and a reinforcing frame body is interposed between and connected to the opposing surfaces of the inner peripheral portions of the front and rear ring members protruding into the pipe body. The reinforcing frame body is detachably connected to the opposing surface of the inner peripheral portion protruding into the pipe line in the front and rear ring members at the front and rear end faces, and is disposed at predetermined intervals in the circumferential direction of the pipe line. The pipe line formation according to claim 1 or 2, comprising a plurality of horizontal support members and a plurality of arcuate frame members detachably connected between opposing surfaces of adjacent horizontal support members. Tunnel excavator. 4. The tunnel excavator for forming a pipeline according to claim 1, wherein the rear end portion of the excavator body and the reinforcing frame are connected by a plurality of direction correcting jacks. . An annular end face plate is detachably fixed to the front end face of the first pipe body in the pipe line, and a hood portion projects forward from the outer peripheral edge of the end face plate, and the inner peripheral portion is the pipe body. The inner end surface of the tunnel excavator is protruded inward, and the front end surface of the excavator body of the tunnel excavator is detachably connected to the rear surface by a bolt to prevent the tunnel excavator from rolling. Item 2. A tunnel excavator for forming a pipeline according to Item 1. The outer diameter of the cutter head is formed to be smaller than the inner diameter of the pipe line, and cutter teeth that protrude radially from the outer periphery of the cutter head are disposed on the cutter head. The tunnel excavator for pipe formation as described.

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