JP2008014043A - Recovery device of excavator body in tunnel excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely and efficiently recover an excavator body by carrying out backward in a stable carrying attitude, after excavating a tunnel of the predetermined length by a tunnel excavator, while forming a pipe duct. <P>SOLUTION: This tunnel excavator has an outer shell body 1 and the excavator body 3 extractably supporting its inner shell body 6 by a ring-shaped first partition wall 2 integrally arranged on a front end inner peripheral surface of this outer shell body 1, and is constituted so that when recovering the excavator body 3, after removing a cutter plate 4 rotatably journaled to the excavator body 3 from the excavator body 3, the excavator body 3 is pulled in the outer shell body 1, and is put in an attitude of a state of lying down on one's face by rotating by 90 degrees in the longitudinal direction in a state of handing in the air, and is mounted on a carrying carriage 23 traveling on a rail 20 laid in the pipe duct in this state, and is recovered to the starting shaft side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an excavator body recovery device in a tunnel excavator that collects and removes an excavator body through the pipe after a predetermined length of pipe is formed while excavating a tunnel in the ground with a tunnel excavator. It is about.

  In tunnel construction in which a tunnel is formed on the wall of the excavation wall while excavating the tunnel underground from the start shaft side with a tunnel excavator, the tunnel excavator reaches the reaching shaft. Then, it is carried out on the ground from this reach shaft and reused, but there is an existing human hole on the arrival side, or there is a building etc. in the vicinity and a reach shaft is provided. If there is no reaching shaft as in the case where there are no tunnel excavators or when two tunnel excavators are docked in the ground, or if the reaching shaft is not completed or the tunnel excavator is orthogonal to the existing long pipeline When it is reached, the tunnel excavator must be withdrawn toward the start shaft side and collected.

  As such a recovery-type tunnel excavator, for example, as described in Patent Document 1, a cylindrical outer shell whose outer diameter is substantially the same as that of the pipe, The excavator body is formed with a diameter smaller than the inner diameter of the conduit, and is connected to and supported by the outer shell body so that it can be pulled out rearward. A cutter head whose outer diameter is smaller than the inner diameter of the pipe is rotatably supported by a partition wall provided integrally with the front portion of the inner shell body. It has a structure including drive means and means for carrying out excavated earth and sand excavated by the cutter head.

Then, when the tunnel is excavated to a predetermined length by this tunnel excavator, the bogie equipped with equipment such as hydraulic equipment following the tunnel excavator and the carriage equipped with lining equipment materials are collected on the start shaft side. After that, all the running rails of these trucks are removed, while the cutter head of the tunnel excavator is reduced to the inner diameter of the tunnel lining body, and the outer shell remains on the excavation wall surface. By pulling the inner shell body of the excavator body from the shell body into the rear part of the outer shell body, attaching the guide roller to the lower peripheral surface of the inner shell body, and then pulling the excavator body backward, the guide roller The excavator body is collected toward the start shaft side while rolling on the inner bottom surface of the pipe.
JP 2004-346688 A

  However, according to the excavator body recovery method in the tunnel excavator as described above, the excavator body cannot be recovered until the rails laid in the pipeline are removed. Not only is it time-consuming, but if the rail is removed, it can be used, for example, for loading and unloading the casting equipment when placing concrete on the inner peripheral surface of the outer shell that is left on the excavation wall. Disappear. Further, a guide roller is mounted on the lower peripheral surface of the excavator body as a conveying means, and the excavator body is recovered while rolling the guide roller on the inner bottom surface of the pipe. The inner bottom surface of the road may be damaged.

  In addition, when the length of the inner shell of the excavator body is short, it is difficult to secure an area where guide rollers can be mounted on both the front and rear sides of the lower peripheral surface of the inner shell. Even if the guide rollers can be mounted, the support of the excavator main body by these guide rollers becomes unstable, and there is a problem that the recovery operation becomes difficult.

  The present invention has been made in view of such problems, and its object is to form a predetermined length of a pipeline while excavating the tunnel with a tunnel excavator and then lay it in the pipeline. Provided is an excavator body recovery device in a tunnel excavator that can efficiently recover an excavator body in a stable transport state and without damaging a pipe line without removing the rail. It is in.

  In order to achieve the above object, an excavator body recovery device in a tunnel excavator according to the present invention comprises, as described in claim 1, an outer shell body provided with a ring-shaped first partition wall on an inner peripheral surface of a front end. And an inner shell body that is slidably contacted and supported by the first partition wall of the outer shell body, and a second partition wall is integrally provided at the front end of the inner shell body, and is provided on the back surface of the second partition wall. A tunnel excavator comprising an excavator body equipped with a rotation driving means for the cutter plate and a cutter plate rotatably supported by the excavator body, while excavating the tunnel in the ground, has a predetermined length. A recovery device for recovering the excavator body through the pipeline after forming the pipeline, a rail composed of sleepers and rails preliminarily laid in the pipeline, and a first outer shell body Place the excavator body withdrawn backward from the bulkhead and place it on the rail Consists of a transport carriage to row further has a conveying direction of travel formed by mounting a long fall prevention member to the structure of the carriage in proximity to the sleepers on either side bottom of the conveyance carriage.

  In the excavator main body recovery apparatus in the tunnel excavator thus configured, the invention according to claim 2 is the structure of the transport carriage, which is 90 degrees in the front-rear direction after separating the cutter plate. A mounting table for mounting the excavator main body that has been placed in a prone state by rotating; and a wheel that is pivotally supported on the lower surface of the mounting table and rotates on the rail. An opening is provided through which the rotating shaft of the cutter plate protruding vertically from the excavator body can be inserted.

  Further, in the invention according to claim 3, as a structure of the transport carriage, a mounting table for mounting the excavator main body that has been in a prone state by rotating 90 degrees in the front-rear direction together with a cutter plate having a reduced diameter; A wheel that is pivotally supported on the lower surface of the mounting table and rotates on the rail, and an opening through which a drilling bit that protrudes downward from the central portion of the cutter plate placed downward can be inserted into the central portion of the mounting table. A portion is provided.

  According to the first aspect of the present invention, a predetermined length of a pipeline is formed while excavating a tunnel in the ground by a tunnel excavator, and then pulled out from the first partition wall of the outer shell of the tunnel excavator. A recovery device for recovering the excavator body through the pipeline, excavating the rail composed of sleepers and rails preliminarily laid in the pipeline, and the first bulkhead of the outer shell. Since it is composed of a transport carriage that mounts the machine body and travels on the rail, the excavator body can be transported using the rail without removing the rails laid in the pipeline. Therefore, the excavator body can be collected smoothly and efficiently without damaging the inner wall surface of the pipe.

  Furthermore, since the existing rails laid in the pipeline are for transporting segments and the like, and the width of the rails is narrow, there is a possibility that the transport carts may tilt left and right while traveling. At the lower part of both sides of the rail, close-up members on both sides of the rail sleeper are mounted in the traveling direction of the transport carriage, so that if the transport carriage tries to tilt in the left-right direction while traveling, the fall It is possible to reliably prevent the prevention member from coming into contact with the sleepers and toppling over and to easily collect the excavator body while placing it in a stable state.

  In the recovery apparatus according to claim 1, according to the invention according to claim 2, the transport cart is configured to dispose the excavator main body that has been put in a prone state by cutting the cutter plate 90 degrees in the front-rear direction. A mounting table and a wheel that is pivotally supported on the lower surface of the mounting table and rotates on the rail, and a cutter plate that protrudes vertically from the prone excavator body at the center of the mounting table. Since the opening through which the rotating shaft can be inserted is provided, the height of the excavator body mounted on this mounting table can be lowered, and the excavator body can be securely attached even in a narrow pipe line. Can be transported toward the start shaft side, and when the rotating shaft of the cutter plate is inserted through the opening, the front surface of the excavator body, which is turned downward after the cutter plate is cut off, is placed on the mounting table. Make sure that it is fully received in surface contact. Therefore, the excavator main body can be placed in a stable state on the mounting table without rattling or reluctance, and in this state, the excavator main body can be easily recovered along the rails by the transport carriage. Can do.

  According to the invention of claim 3, the transport carriage is put in a prone state by rotating it 90 degrees in the front-rear direction together with the cutter plate having a reduced diameter without removing the cutter plate from the excavator body. A mounting table on which the excavator body is mounted and a wheel that is pivotally supported on the lower surface of the mounting table and rotates on the rails. From the center of the cutter plate that is mounted downward on the center of the mounting table. Since the opening portion through which the excavating bit protruding downward can be inserted is provided, the cutter plate of the reduced diameter state is integrally provided in the excavator body, but the cutter plate The height of the excavator body mounted on the mounting table can be made as low as possible by inserting the drilling bit protruding in the center through the opening provided in the center of the mounting table. Cutter plate with reduced diameter excavator body Both out through conduit it can be recovered.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a tunnel excavator that constructs a pipe line S made of a tunnel lining body such as a segment on the excavation wall surface while excavating the tunnel T. The tunnel excavator has a cylindrical outer shell 1 whose outer diameter is substantially the same as the tunnel excavating diameter, and an outer peripheral end face on the inner peripheral surface of the front end portion of the outer shell 1. A ring-shaped first partition wall 2 that is integrally fixed by welding or the like, and is formed by integrally fixing the outer peripheral surface of the front end portion of the annular portion 2a that opens in the front-rear direction to the inner peripheral end surface by welding or the like. The excavator body 3 is fitted and supported so as to be retractable toward the annular portion 2 a of the partition wall 2, the cutter plate 4 is rotatably supported by the excavator body 3, and the cutter plate 4 is rotated. Driving means 5, and the inner diameter of the annular portion 2 a of the first partition 2 is It has a smaller diameter than the inner diameter of road S.

  The excavator main body 3 is slidably contacted with the inner peripheral surface of the annular portion 2a of the first partition wall 2 so that the outer peripheral surface can be pulled out rearward, and has substantially the same length as the annular portion 2a. An annular inner shell 6 in which the front end edge is detachably connected to the front end edge of the annular portion by a bolt, and an outer peripheral end is fixed to the front end of the inner shell 6 and the inner end is fixed. The disk-shaped second partition wall 7 provided integrally with the shell body 6 and the rotation driving means 5 mounted on the back surface of the second partition wall 7 include the second partition wall 7. A meshing gear mechanism (not shown) disposed in the housing 8 provided integrally with the back surface of the housing 8 and a drive motor 5a attached to the back surface of the housing 8 are configured by the drive motor 5a. The rotary shaft 11 of the cutter plate 4 supported rotatably at the center of the excavator body 3 via It is configured to rotate.

  The cutter plate 4 has a disc-shaped central cutter plate portion 4a having an outer diameter smaller than the annular portion 2a of the first partition wall 2 and having a diameter that can pass through the annular portion 2a, An annular outer cutter plate portion 4b that is detachably connected by a bolt having an inner peripheral surface fitted to the outer peripheral surface of the central cutter plate portion 4a, and a bolt connected to the outer peripheral surface of the outer cutter plate portion 4b. The outer peripheral ring portion 4c is formed so that the outer diameter of the outer peripheral ring portion 4c of the outer peripheral cutter plate portion 4b is equal to the outer diameter of the outer shell 1 of the tunnel excavator. The central cutter plate portion 4a is fitted and fixed to the tip of the rotating shaft 11 projecting forward from the second partition wall 7 through a bolt or the like. Further, the outer cutter plate part 4b is divided into a plurality of parts in the circumferential direction and is connected to each other by bolts so as to be disassembled.

  Further, on the front surface of the cutter plate 4, a large number of cutter bits 9 are projected forward and a plurality of earth taking-in openings 4d are provided radially from the center portion toward the outer peripheral end portion, The earth and sand intake opening 4d is formed by a space between the back surface of the cutter plate 4 and the front surface of the first partition wall 2 and the second partition wall 7 with the front surfaces thereof being located on substantially the same vertical plane. The earth and sand take-up room 10 is connected.

  Further, the vertical plate portions of the reaction force receiving member 12 having an L-shaped cross section are removably attached to the excavator main body 3 at several locations on the outer periphery of the back surface by bolts, and the horizontal plate portions of these reaction force receiving members 12 are respectively removed. The outer shell 1 and the excavator main body 3 are detachably connected to the fixing member 12 'fixed to several locations on the inner peripheral surface of the shell 1 by bolts, and the reaction force receiving member 12 detachably connects the outer shell 1 and the excavator main body 3. ing.

  The outer shell body 1 is divided into a front body portion 1a and a rear body portion 1b, and the rear end portion of the front body portion 1a and the front end portion of the rear body portion 1b are connected to each other through a bent portion 13 so as to be refractable. The ring garter 14 is fixed to the inner peripheral surface of the front end portion of the rear trunk 1b, and a plurality of propulsion jacks 15 are supported in the ring garter 14 at regular intervals in the circumferential direction. The forward end of the rod of the propulsion jack 15 is brought into contact with the front end surface of the pipe S, and the tunnel excavator is propelled by extending the pipe S by taking a reaction force.

  Further, the inner peripheral surface of the front body part 1a and the rear body part 1b are connected by a plurality of middle folding jacks 16 arranged at regular intervals in the circumferential direction via the middle folding part 13, and An erector 17 is arranged in the front part of the front body 1a to assemble a segment on the excavation wall surface to form a pipe S composed of the tunnel lining body, and the excavated sediment is discharged from the sediment intake chamber 10 A mud pipe 18 and a mud pipe 19 are provided as soil discharging means.

  The tunnel excavator configured as described above is installed in a start shaft (not shown), and excavates the tunnel T in a predetermined direction while rotating the cutter plate 4. Each time a certain length of tunnel is excavated, segments are assembled on the excavation wall surface by an erector to cover the excavation wall surface, and the propulsion reaction force of the propulsion jack 15 is applied to the front end surface of the pipe line S composed of the tunnel lining body. The tunnel excavator A is moved forward by extending the propulsion jack 15. At this time, the propulsive force by the propulsion jack 15 is transmitted from the outer shell body 1 to the excavator main body 3 through the reaction force receiving member 12, excavating the natural ground while pressing the cutter plate 4 against the face, and the cutter plate The rotational reaction force 4 is received by the outer shell body 1 through the reaction force receiving member 12 and digs while preventing the rolling of the excavator body 3. The earth and sand excavated by the cutter plate 4 is taken into the earth and sand intake chamber 10 and discharged to the ground through the tunnel along with the muddy water by the return mud pipes 18 and 19 communicating with the earth and sand intake chamber 10. Is done.

  In this way, the tunnel excavator forms a pipe S of a predetermined length composed of the segment lining body while lining the excavation wall surface to a predetermined position with the segment, and then the excavator body 3 through the pipe S to the start shaft side. Move to work to collect.

  As shown in FIGS. 2 and 3, the recovery device for the excavator main body 3 is not shown in FIG. 2 and FIG. 3, and a rail 20 that is preliminarily laid in the pipe S for moving a subsequent carriage of the tunnel excavator. Pulls out the excavator main body 3 by pulling the excavator main body 3 from the annular portion 2a of the first partition wall 2 of the outer shell body 1 into the front body portion 1a of the outer shell body 1 through a wire rope, etc. A posture composed of a support base 21 for supporting the machine body 3 and a plurality of chain blocks for changing the posture to a prone state by hanging the excavator body 3 on the support base 21 and rotating it 90 degrees in the vertical direction. The change means 22, the excavator main body 3 rotated by 90 degrees, and the transfer carriage 23, which is a transfer means that moves on the rail 20 toward the start shaft, project above the support base 21. The rear end of the short rail 25 laid on the upper surface of the rail 20 of the rail 20 It is comprised from the transfer stand 24 connected to the front end of a.

  The rails 20 are installed between the both sides of the inner bottom surface of the pipe S, and the sleepers 2b arranged at intervals of one unit in the length direction of the pipe S and the parallels fixed on the sleepers 2b. Each time a tunnel part of a certain length is excavated by the above tunnel excavator, it follows the segment cart or tunnel excavator on the trajectory 20 while adding to the trajectory previously laid according to the excavation length. Then, a subsequent carriage (not shown) or the like that moves forward together with the tunnel excavator is moved, and the front end thereof is provided in the vicinity of the rear of the rear trunk portion 1b of the tunnel excavator.

  The above-mentioned support base 21 is for drawers mounted on the lower peripheral part in the rear part of the front body part 1a of the outer shell 1 on the front and rear side parts in the lower peripheral part when the excavator body 3 is pulled out. It is installed to be the same height as the roller 26. Further, the posture changing means 22 composed of the chain block is disposed on both the front side, the rear side, and the middle side on the inner surface of the upper body portion 1a of the outer shell 1. The wire rope is connected to the upper and lower sides of the excavator main body 3 on the upper and lower sides and the lower end of the rear surface, and the direction of the excavator main body 3 is changed in the vertical direction by pulling out and rewinding these yaropes It is configured.

  As shown in FIGS. 4 and 5, the transport carriage 23 is provided in a polygonal horizontal outer frame 23a for receiving the outer peripheral portion of the front surface of the second partition wall 7 of the excavator body 3 and a central portion of the horizontal outer frame 23a. The horizontal inner frame 23b is disposed below the horizontal outer frame 23b with a small gap and is placed horizontally outside via the connecting frame 23c. A state in which the front end shaft portion of the rotary shaft 11 of the cutter plate 4 protruding forward from the second partition wall 7 is inserted into the opening 23d surrounded by the horizontal inner frame 23b while being integrally fixed to the frame 23a. It is comprised so that it may support. Further, wheels 27 that rotate on the rail 20a of the rail 20 are attached to the front and rear sides of the lower surface of the transport carriage 23, and leg pieces 28, 28 are downwardly directed from the front and rear sides of the horizontal outer frame 23a. And projecting at the lower end of the leg pieces 28, 28 toward the direction perpendicular to the sleeper 20b in the state of being close to the upper surface of the both ends of the sleeper 20b on the outer side of the both side wheels 27, that is, toward the tunnel length direction. The members 29 and 29 for preventing toppling, which are horizontally disposed rods, are fixed.

  As shown in FIGS. 2 and 3, the transfer table 24 has rails on both sides of the rail 20 on the front and rear portions on the inner bottom surface of the front barrel portion 1a of the outer shell body 1 and on the middle portions of the front and rear portions. The support legs 30 installed at the same intervals as 20a and 20a are fixed in an installed state between the upper end surfaces of the leg bodies 30, 30, 30 arranged in series in the front-rear direction of these leg bodies 30. The short rail 25 is configured as described above. Further, all the legs 30 are pivoted so as to be foldable outwardly at a lower leg 30a having a height lower than the height of the support 21 and an upper end of the lower leg 30a. The short rails 25 are fixed in an erected state between the upper end surfaces of the upper leg portions 30b. The upper leg 30b is erected above the support 21 so that the short rail 25 is continued in abutment with the front end surface of the rail 20a of the rail 20.

  In order to recover the excavator main body 3 using the recovery device configured as described above, first, the above-described erector 17 and the supply / discharge mud pipes 18 and 19 disposed in the outer shell 1 and the reaction force reception After disassembling and removing the member 12 and the like and collecting and removing it on the start shaft side, as shown in FIG. 6, after providing a space part where the excavator body 3 can be pulled out on the rear side of the excavator body 3, The support base 21 is installed on the inner bottom portion of the front trunk portion 1a of the outer shell 1 behind the excavator main body 3. At this time, the transfer table 24 is also installed together with the support table 21, and the upper leg 30b is folded outward so as not to obstruct the extraction of the excavator body 3. The transfer table 24 may be installed when the excavator body 3 is rotated 90 degrees in the vertical direction. In addition, the above-mentioned erector 17 and the supply and discharge mud pipes 18 and 19 are provided on a carriage (not shown) that travels on the rail 20 laid to the vicinity of the rear end of the outer shell 1 of the tunnel excavator. Mounted and collected on the start shaft side and removed.

  Further, an operator enters the earth and sand taking-in chamber 10 through an entrance (not shown) provided in the second partition wall 7 of the excavator body 3 and protrudes forward from the center portion of the cutter plate 4 and the second partition wall 7. The bolts connecting the tip of the rotary shaft 11 are removed and the connecting bolts between the outer cutter plate portion 4b and the central cutter plate portion 4a of the cutter plate 4 are also removed, while the lower end portion of the excavator main body 3 is removed. Attach the drawer rollers 26 (shown in FIG. 7) to both the front and rear sides and disconnect the connection between the ring portion 2a of the first partition wall 2 and the inner shell 6 of the excavator body 3 with A wire rope drawn from a pulling means composed of a traveling towing vehicle or the like is connected to the rear surface of the excavator main body 3 and the excavator main body 3 is pulled by this pulling means to remove the inner shell body 6 of the excavator main body 3. An annulus 2a of the first partition 2 fixed to the shell 1 The excavator main body 3 is retracted while being pulled out from the base and placed on the support base 21 as shown in FIG. At this time, the excavator main body 3 is smoothly pulled out while the drawer roller 26 mounted on the lower peripheral portion of the excavator main body 3 at the same height as the support base 21 rotates on the support base 21.

  Since the cutter plate 4 is separated from the excavator main body 3 by pulling the excavator main body 3 backward, the central cutter plate portion 4a of the cutter plate 4 is removed from the outer cutter plate portion 4b by using the above-described extraction means. Removed rearward, suspended temporarily with a wire rope on the annular portion 2a of the first partition 2, etc. and temporarily placed in the front end of the outer shell 1, and the outer cutter plate portion 4b has its outer ring portion 4c The outer shell 1 is left in contact with the excavation ground on the front side.

  The excavator body 3 pulled out on the support base 21 is then lifted slightly by the posture changing means 22 comprising a plurality of chain blocks mounted on the inner surface of the upper peripheral portion of the front body portion 1a of the outer shell body 1, In this state, it is rotated 90 degrees in the vertical direction (front-rear direction), and the posture can be changed from the state in which the second partition wall 7 faces the front to the prone state. The posture changing means 22 may be mounted before the excavator body 3 is pulled out, or may be mounted after the pulling out.

  In order to rotate the excavator body 3 up and down by 90 degrees by the posture changing means 22, first, as shown in FIGS. 8 to 10, the front portion on the inner surface of the upper peripheral portion of the front trunk portion 1a of the outer shell body 1 is used. The wire ropes 22a of the posture changing means 22 disposed on both sides are disposed on the upper end both sides of the front surface of the excavator body 3, and the wire ropes 22b of the posture changing means 22 disposed on both sides of the intermediate portion are excavators. The excavator body 3 is kept in an upright state, that is, with its second partition wall 7 facing forward, by contracting these wire ropes 22a and 22b, respectively, connected to both upper end sides of the rear surface of the body 3. Slightly lift it away from the support 21 and suspend it.

  Next, after connecting the wire ropes 22c of the posture changing means 22 disposed on both sides of the rear part of the upper inner surface of the front body part 1a of the outer shell body 1 to both sides of the lower end of the rear surface of the excavator body 3, As shown in FIG. 11, while pulling the wire rope 22c in the contracting direction, the wire ropes 22a and 22b connected to both upper and lower end portions of the front and rear surfaces of the excavator body 3 are made according to the tensile amount of the wire rope 22c. The excavator body 3 is slowly rotated in a prone direction by operating the excavator body 3 slowly so that the upper end side moves forward and the rear end side moves rearward while adjusting the extension amount.

  When the excavator body 3 is rotated to some extent, as shown in FIGS. 12 to 14, the wire ropes 22a and 22a connected to both sides of the upper end of the front surface of the excavator body 3 are replaced with the wire ropes 22b and 22b of the intermediate portion. After moving the connecting portions to the both sides of the rear upper end of the connected excavator body 3, the excavator body 3 is further rotated in a prone direction. At this time, the excavator body 3 is formed so that its length (the length of the rotary shaft 11) is equal to or slightly shorter than the outer diameter of the excavator body 3 (diameter of the second partition wall 7). Even in a narrow space in the shell 1, it can be reliably rotated in the vertical direction (front-rear direction) in a suspended state without colliding with surrounding devices.

  When the excavator body 3 is prone until the second partition wall 7 is in a horizontal state and the rotary shaft 11 is in a vertical state as shown in FIGS. 15 and 16, the front of the outer shell 1 is shown in FIG. The short rails 25, 25 on both sides of the transfer table 24 installed on the inner bottom surface of the trunk portion 1a are integrated with the lower leg body portion 30a of the leg body portion 30 so that the short rail 25 is integrally provided. Between the rails 20a, 20a of the rail 20 that is erected by rotating the leg portion 30b upward and that is also laid to the rear vicinity of the outer shell 1 on both side short rails 25, 25 A recovery rail 20 ′ having the same structure as the rail 20 is laid to extend the rail 20, and the short rails 25 and 25 are connected to the rail 20a of the rail 20 via the rail 20a of the recovery rail 20 ′. , 20a. The recovery rail 20 'may be laid during the rotating operation of the excavator body 3 in the vertical direction.

  Next, the transport carriage 23 is carried from the recovery rail 20 'onto the short rail 25 on the transfer table 24 while traveling on the rail 20 from the start shaft side, and then the posture changing means 22 as shown in FIG. The excavator main body 3 is lowered in a prone state while gradually extending the wire rope, and the rotation projecting vertically downward from the center of the second partition wall 7 facing the mounting table 23 'of the transport carriage 23 The shaft portion of the shaft 11 is inserted into the opening 23d in the horizontal inner frame 23b of the mounting table 23 ', and the outer periphery of the second partition wall 7 is received on the upper surface of the horizontal outer frame 23a of the mounting table 23'.

  In this way, the rotary shaft 11 protruding downward from the second partition wall 7 is inserted into the opening 23d in the horizontal inner frame 23b of the mounting table 23 'in the transport carriage 23, so that the excavator body 3 can be kept in a low posture. Since the outer peripheral portion of the second partition wall 7 can be mounted on the horizontal outer frame 23a of the mounting table 23 ', it can be mounted on the transporting carriage 23, so that the transporting carriage can be in a stable posture without causing any flickering or the like. The excavator body 3 can be carried out efficiently.

  When the excavator body 3 is loaded on the transport carriage 23, the support of the posture changing means 22 by the wire rope is released, and then the transport carriage 23 is recovered from the transfer base 24 in the outer shell 1 shown in FIG. As shown in FIG. 4 and FIG. 18 through the rail 20 ′, it is moved onto the rail 20, and travels on the rail 20 toward the start shaft side in the pipeline S to collect and remove the excavator body 3. Is. At this time, leg pieces 28 and 28 are provided so as to protrude downward on both sides of the horizontal outer frame 23a of the transport carriage 23, and between the lower ends of the leg pieces 28 and 28, the traveling wheels 27 of the transport carriage 23 are provided. In the state where the sleeper 20b on the outer side is close to the upper surface of both ends, the members 29 and 29 for preventing the fall of the transport carriage 23 are fixed, so that the transport carriage 23 tries to tilt left and right while traveling. However, it is possible to reliably prevent the toppling prevention member 29 from coming into contact with the sleepers 20b and tilting greatly, and to recover the excavator body 3 in a stable state.

  After the excavator body 3 is collected, the transport carriage 23 is again carried onto the short rails 25 and 25 on the transfer table 24 installed in the outer shell 1 of the tunnel excavator, as shown in FIG. As described above, after the central cutter plate portion 4a of the cutter plate 4 is mounted on the mounting table 23 'of the transfer carriage 23, the transfer carriage 23 is run on the rail 20 in the same manner as the excavator main body 3 to start the vertical shaft. Collect and remove to the side. Note that the outer cutter plate portion 4b of the cutter plate 4 is also removed from the outer ring portion 4c supported by the excavation wall surface and collected and removed by the transport carriage 23.

  Thus, after collecting the central cutter plate portion 4a and the outer cutter plate portion 4b of the excavator body 3 and the cutter plate 4, the propulsion jack 15, the bent jack 16 and the like are also collected and removed, and the first partition wall 2, the ring gutter 14, etc. After removing the support table 21 and the transfer table 24, the outer ring body 4c and the outer ring portion 4c of the cutter plate 4 left as the lining material for the excavation wall surface in the vicinity of the face are removed. The tunnel lining body having the same inner diameter as the inner diameter of the pipe line S made of the tunnel lining body is formed by placing concrete on the inner peripheral surface. At this time, the concrete placement equipment is carried into the outer shell 1 using the rails 20 and 20 ', and after placement, the concrete placement equipment is carried out using the rails 20 and 20'.

  In the above embodiment, the excavator main body 3 and the central cutter plate portion 4a having a reduced diameter of the cutter plate 4 are separately collected, but the work in the outer shell 1 of the tunnel excavator is performed. If there is room in the space, the excavator body 3 and the central cutter plate 4a may be collected together without being separated.

  That is, a tunnel S is excavated from the starting vertical shaft to a predetermined position in the ground by the tunnel excavator configured as described above, and a pipe line S is formed by segment lining on the excavation wall surface, and then the pipe is arranged in the outer shell 1. As shown in FIG. 6, the excavator body 3 is disassembled and removed from the starter pit side by disassembling and removing the above-mentioned erector 17, the feeding / draining mud pipes 18 and 19, the reaction force receiving member 12, etc. The excavator main body 3 is provided with a space on the rear side so that the excavator main body 3 can be pulled out, and then the support base 21 is installed on the inner bottom of the front body 1a of the outer shell 1 at the rear of the excavator main body 3. At this time, the transfer table 24 is also installed together with the support table 21, and the upper leg 30b is folded outward so as not to obstruct the extraction of the excavator body 3.

  Further, an operator enters the earth and sand taking-in chamber 10 through an entrance (not shown) provided in the second partition wall 7 of the excavator main body 3, and the outer cutter plate portion 4b and the central cutter plate portion 4a in the cutter plate 4 While removing the connecting bolts, the pull-out rollers 26 are attached to both the front and rear sides of the lower peripheral portion of the excavator body 3 and the bolts between the annular portion 2a of the first partition wall 2 and the inner shell body 6 of the excavator body 3 are used. After disconnecting, excavating by pulling the excavator main body 3 with this pulling means by connecting the wire rope drawn from the pulling means consisting of a towing vehicle etc. traveling on the rail 20 to the rear surface of the excavator main body 3 A central cutter plate having a shape in which the inner shell 6 of the machine body 3 is extracted from the annular portion 2a of the first partition 2 fixed to the outer shell 1, and the cutter plate 4 is reduced in diameter through the annular portion 2a. 4a is moved back together with the excavator main body 3 and above the support base 21 Place.

  Next, in the same manner as in the above-described embodiment, the excavator body 3 is integrally provided with the central cutter plate portion 4a on the entire surface. After connecting the wire ropes of the posture changing means 22 composed of a plurality of chain blocks, the excavator main body 3 is suspended from the state by operating these posture changing means 22 and the excavator in the same manner as described above. The main body 3 is rotated 90 degrees in the vertical direction (front-rear direction) to change the posture from the state in which the second partition 7 is directed to the front to the prone state.

  On the other hand, the short rails 25 and 25 on both sides of the transfer table 24 installed on the inner bottom surface of the outer shell 1 below the excavator body 3 are connected to the upper leg 30b with respect to the lower leg 30a. The rails 20a and 20a of the rail 20 that are laid up to the rear vicinity of the outer shell 1 are connected by the recovery rail 20 '. The transport carriage 23A is carried from the recovery rail 20 'onto the short rail 25 on the transfer table 24 while running on the rail 20 from the starting shaft side in a continuous state, and the excavator body 3 is shown in FIG. As shown, it is mounted on the transport carriage 23A.

  At this time, as the transport carriage 23A, a carriage having a mounting base 23 ′ in which the horizontal outer frame 23a and the horizontal inner side 23b are vertically spaced as described above may be used. In such a configuration, a situation occurs in which the height of the transport carriage becomes high and it becomes difficult to carry out the excavator main body 3. Therefore, the transport carriage 23A has a central portion of the cutter plate 4, for example, a central portion thereof. In the case of a cutter head having a structure in which an excavation bit 9 ′ is protruded on the front surface of the flat plate, a flat plate-like mounting table 23a ′ provided with an opening for supporting the excavation bit 9 ′ in an inserted state A cart having a structure in which the wheel 27 is pivotally supported is adopted.

  In this way, the transport carriage 23A carrying the excavator body 3 provided with the central cutter plate portion 4a having a reduced diameter shape is moved from the transfer table 24 onto the rail 20 through the recovery rail 20 '. Then, the excavator main body 3 is collected and removed together with the central cutter plate portion 4a by running in the pipeline S toward the start shaft side.

  In any of the above embodiments, the annular cutter plate 4b is removably attached to the outer periphery of the central cutter plate 4a as the cutter plate 4, and the outer cutter plate 4b is removed. Is configured to reduce the diameter so that it can pass through the annular portion 2a of the first partition wall 2, but is slightly smaller than the radius of the annular portion 2a of the first partition wall 2 in the radial direction from the tip of the rotating shaft 11. A plurality of hollow spokes having a short length project radially, and outer side spoke pieces can be protruded and extended from these hollow spokes in the extending direction by operation of a hydraulic jack disposed in the hollow spokes. It may be a spoke-type cutter head that protrudes toward the front of a plurality of excavation bits on the front surface of these hollow spokes and outer peripheral spoke pieces, and further, as a means for carrying out excavated earth and sand, the above It may be a tunneling machine which employs the screw conveyor or the like in place of the mud pipe 18, 19.

  Further, when the excavator main body 3 is collected, the excavator main body 3 is mounted on the transport carriage 23 in a state where the excavator main body 3 is rotated in a prone direction and the second partition wall 7 is directed downward. It may be mounted on the transport carriage 23 in a state in which the second partition wall 7 is turned upward by turning in the direction. Further, when the pipe S has a relatively wide space without rotating the excavator main body 3 by 90 degrees in this way, the annular portion 2a of the first partition 2 in the outer shell 1 is obtained. The excavator body 3 in a standing state drawn out from the vehicle may be placed on the transport carriages 23 and 23A as they are, and carried out to the start shaft side through the rail 20. Therefore, in this case, the posture changing means 22 is not necessary.

A longitudinal side view of a tunnel excavator. The simplified side view of the whole collection | recovery apparatus mounted on a conveyance trolley with the excavator main body lying down. The simplified front view. The simplified side view of the state which is carrying out the excavator main body. The top view of a conveyance trolley. A vertical side view of a tunnel excavator with a mud pipe and an erector removed. The vertical side view of the state which pulled the excavator main body on the support stand. The longitudinal side view of the state which suspended the excavator main body. The front view. The rear view. The vertical side view of the state which is rotating the excavator main body. The vertical side view of the state which is rotating the excavator main body to a substantially supine state. Front view The rear view. The vertical side view of the suspended support state which rotated the excavator main body to the supine state. The front view. The vertical side view of the state which carries a conveyance trolley to the lower part of an excavator main body. The simplified front view in the middle of carrying out an excavator main body. The longitudinal side view of the state which carries out the cutter board part of a diameter-reduced state. The vertical side view of the state which collect | recovers the cutter board and excavator main body which were diameter-reduced integrally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer shell body 2 1st partition 3 Excavator main body 4 Cutter plate 5 Rotation drive means 6 Inner shell 7 Second partition
11 Rotation axis
20 rail
21 Support base
22 Posture change means
23 Transport cart
24 Transfer table
29 Fall prevention material

Claims (3)

  An outer shell body provided with a ring-shaped first partition wall on the inner peripheral surface of the front end portion, and an inner shell body slidably contacted and supported by the first partition wall of the outer shell body. An excavator main body in which a second partition wall is integrally provided at the front end of the main body, and a rotation driving means of a cutter plate is mounted on the back surface of the second partition wall, and a cutting plate rotatably supported by the excavator main body. A recovery device for recovering the main body of the excavator through the pipe after forming a predetermined length of the pipe while excavating the tunnel in the ground by the tunnel excavator provided. A rail composed of sleepers and rails laid, and a transport carriage on which the excavator body pulled out rearward from the first bulkhead of the outer shell is placed and travels on the rail. Long fall prevention part in the direction of travel of the carriage near the sleepers at the bottom of both sides Recovery system of the excavator main body in a tunnel boring machine, characterized in that wearing the.   The transport carriage is mounted on the excavator body that has been placed in a prone state by rotating 90 degrees in the front-rear direction after cutting the cutter plate, and is supported on the lower surface of the mount base and rotates on the rail. 2. An opening for inserting a rotary shaft portion of a cutter plate protruding vertically from a prone excavator body is provided at a central portion of the mounting table. The excavator body recovery device in the tunnel excavator described.   The carriage is mounted with a mounting table on which the main body of the excavator turned into a prone state by rotating 90 degrees in the front-rear direction together with the reduced diameter cutter plate, and is supported on the lower surface of the mounting table and rotates on the rail. 2. An opening through which an excavation bit projecting downward from a central portion of a cutter plate placed downward is inserted in a central portion of the mounting table. The excavator body recovery device in the tunnel excavator described.

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