JP3698431B2 - Underground joint type shield machine and its underground joining method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ground joint type shield machine and a ground joint method thereof, and more particularly to a ground joint type shield machine and a ground joint method thereof in which the length of a shield shield machine on a receiving side is short.
[0002]
[Prior art]
In recent years, tunnels for water and sewage and common grooves are often dug by shield construction, in which case there are restrictions on the construction period, and there is a limit to the distance that can be dug by a single shield excavator. In many cases, the pits are excavated with each shield excavator between the vertical shafts. However, when the two shield machines that dig in the direction approaching each other from adjacent shafts reach the underground joint point, they are joined together in the ground, but the underground joint is not easy. Therefore, various underground joint type shield machines and their underground joint methods have been proposed.
[0003]
For example, in Patent Document 1, when a receiving shield machine arrives at the ground junction, the cutter disk of the shield machine is moved backward with respect to the outer trunk, and then the penetrating shield machine is received. Dig until the outer ring part of the cutter disc fits inside the tip of the outer cylinder of the shield shield machine on the side, and then insert the outer cylinder of the shield machine on the penetration side into the outer cylinder of the shield machine on the receiving side A technique is disclosed in which the outer ring portion of the cutter disk and the outer cylinder of both shield machines are sealed and bonded to each other by a tube seal provided at the front ends of both shield machines, which are extruded until they come into contact with each other.
[0004]
In Patent Document 2, among the shield machines close to each other, the cutter disk of the receiving shield machine is moved backward with respect to the body member, and then formed at the front end portion of the body member to be slightly smaller in diameter than the body member. The shield digging machine on the penetration side is advanced until the received hood fits into the trunk member of the shield digging machine on the receiving side, and then the water stop seal provided at the tip of the trunk member of the shield digging machine on the receiving side A technique is disclosed in which the hood and the front end of the trunk member of the receiving-side shield machine are stopped and joined underground. This publication also discloses a technique for improving the sealing performance by removing the mud on the outer peripheral surface of the hood with a scraper provided at the outer trunk front end portion of the receiving side shield machine.
[0005]
In Patent Document 3, among shield shield machines close to each other, the cutter disk is retracted until the front end of the body member of the receiving shield shield machine projects to the front surface of the cutter disk, and then the shield shield machine on the penetration side Is advanced until the cutter disk is fitted into the body member. A protective ring is provided by bringing the tip of the protective ring that protects the sealing device provided at the tip of the barrel member of the penetration-side shield machine during this advancement into contact with the tip of the barrel member of the receiving-side shield machine. A technique is disclosed in which the sealing device is exposed by retreating the body member with respect to the body member, and the water is sealed between the two body members by the sealing device provided on the body member, thereby joining the ground.
[0006]
In Patent Document 4, among the shield shield machines close to each other, the cutter disk of the shield shield machine on the receiving side is moved backward with respect to the barrel member, and then formed at the tip of the barrel member of the shield shield machine on the penetration side. The received hood is advanced until it is fitted into the body member of the receiving side shield machine, and the water is sealed between the two body members by a water stop sealing device provided at the front end of the body member of the receiving side shield machine. A technique for ground bonding is disclosed. This publication also discloses a technique for improving the water stop performance by cleaning the outer peripheral surface of the hood with an injection nozzle provided on the outer peripheral portion of the cutter disk.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-248168 (2nd and 3rd pages, all figures)
[Patent Document 2]
Japanese Unexamined Patent Publication No. 2000-265781 (pages 6 and 7, FIGS. 6, 9, and 10)
[Patent Document 3]
Japanese Unexamined Patent Publication No. 2002-285787 (page 4, FIGS. 6 and 7)
[Patent Document 4]
JP 2002-138787 A (page 6-8, FIGS. 1, 9, 10, 12)
[0008]
[Problems to be solved by the invention]
However, in each of the above publications, when joining the ground, the receiving side shield machine drives the cutter disk or the like backward with respect to the outer body to secure a space for the penetration side shield machine to be inserted. Therefore, since the shield machine on the receiving side needs a space for retracting the cutter disk, the captain is inevitably long. Thus, when the captain of the shield machine becomes long, the following problems arise.
Since the shaft for introducing the shield machine becomes larger, the time required for boring the shaft increases, the construction cost also increases, and when the shield machine is bent, the length of the captain makes the small turn However, excavation is possible only with a large curve of the turning radius, that is, the turning performance is low, and the manufacturing cost for manufacturing the shield machine is increased.
[0009]
In order to improve the water stop performance by a sealing device or the like, a scraper is provided in the receiving side shield machine as described in Patent Document 2, or a penetration side shield machine as described in Patent Document 4 A jet nozzle is provided on the cutter disk to remove mud accumulated on the body member, and in Patent Document 4, a protective ring is provided to protect the sealing device from mud, but the structure of the shield machine However, there are problems such as an increase in the manufacturing cost of the shield machine.
[0010]
The object of the present invention is to reduce the length of the receiving shield machine in the ground joint type shield machine, and to improve the water stop performance by the water stop means without complicating the structure of the shield machine. It is to provide an excavator.
[0011]
[Means for Solving the Problems]
The underground joint type shield machine according to claim 1 is provided with first and second shield machines, and both shield machines are dug in the approaching direction to join both in the ground. In the shield shield machine, the first shield machine on the receiving side slides on the cutter disk, a cylindrical inner cylinder, an outer cylinder slidably fitted to the inner cylinder, and a tip part of the intermediate cylinder A cylindrical inner cylinder that is fitted inside and is fixed to the outer periphery of the partition wall defining the back side chamber of the cutter disk; and an extrusion drive means that can push the outer cylinder in the direction of digging with respect to the middle cylinder. A retraction drive means capable of retreating the inner cylinder together with the cutter disk and the partition wall in a direction opposite to the excavation direction with respect to the middle cylinder, and the second shield machine on the penetration side includes a cutter disk, a cylindrical outer cylinder, Internally slidable on the tip of the outer body A cylindrical inner cylinder fixed to the outer peripheral portion of the partition wall defining the rear chamber of the cutter disk, and an extrusion driving means capable of driving the inner cylinder together with the cutter disk and the partition wall in an excavating direction with respect to the outer cylinder. The water stop means is provided on the outer peripheral portion of the front end portion of the inner cylinder and protected by the outer cylinder, and is water-stopped between the inner peripheral surface of the outer cylinder of the first shield machine in the ground-joined state. It is characterized by having a water stop means.
[0012]
According to this underground welding type shield machine, when both shield machines are dug in the direction of close approach, first, the outer cylinder is first moved to the middle cylinder by the pushing drive means of the first shield machine. After the extrusion in the digging direction, the inner cylinder, the cutter disk and the partition wall are moved backward in the direction opposite to the digging direction with respect to the middle cylinder by the backward driving means, and the second shield digging machine on the penetration side is inserted into the outer cylinder tip. An insertion space for inserting is formed. Next, until the cutter disk of the second shield machine that has reached the ground junction is inserted into the outer body of the first shield machine, the second shield machine is dug in a state opposite to the first shield machine, In addition, until the front end portion of the inner cylinder and the water stop means are fitted into the outer cylinder of the first shield machine by the pushing means of the second shield machine, the inner cylinder, the cutter disk, and the partition wall are extruded to the outer cylinder. Water is stopped between the outer cylinder of the first shield machine and the inner cylinder of the second shield machine by water stopping means.
[0013]
Since the first shield machine is configured so that the insertion space for inserting the second shield machine can be formed not only by retreating the cutter disk but also by extruding the outer cylinder in the machine direction. The retraction distance of the cutter disk is shorter than when the insertion space is secured only by retreating the cutter disk. Therefore, the captain of the first shield machine is shortened, and accordingly, the shaft for introducing the shield machine can be reduced, the turning performance of the shield machine is improved, and the production cost of the shield machine is reduced. Decrease.
Moreover, since the water stop means provided in the second shield machine is protected by the outer body of the second shield machine in the tunnel excavation state, the water stop means is not exposed to the earth and sand. Therefore, the water stop means is not damaged by the excavated mud and the water stop performance is improved.
[0014]
According to a second aspect of the present invention, there is provided a ground joint type shield machine according to the first aspect of the present invention, wherein the outer shell of the first shield machine is moved forward by a first predetermined distance in the direction of tunneling and the inner trunk and the cutter disk. The bulkhead is moved backward by a second predetermined distance with respect to the middle cylinder in the direction opposite to the excavation direction, and the cutter disk of the second shield machine is fitted into the front end of the outer cylinder of the first shield machine to In a state where the outer cylinders are in contact with each other, the inner cylinder of the second shield machine, the cutter disk, and the bulkhead are advanced with respect to the outer cylinder so that the tip portion of the inner cylinder and the water stop means are connected to the first shield machine. This is characterized in that it is configured to be fitted into the outer cylinder.
[0015]
According to this underground joint type shield machine, since the water stop means is pushed out together with the inner cylinder of the second shield machine, the mud adhered to the inner surface of the outer cylinder of the first shield machine by the tip of the inner cylinder. Therefore, mud does not bite between the water stopping means and the inner peripheral surface of the outer trunk of the first shield machine. In addition, since the water stop means is pushed out together with the inner cylinder in a state where the outer cylinders of both shield machines are in contact with each other, the water stop main stage is not exposed to the earth and sand even during underground bonding. That is, in this underground joint type shield machine, the water stop performance is improved without complicating the structure.
[0016]
The underground joint type shield machine according to claim 3 is the underground joint type shield machine according to claim 1 or 2, wherein the inner body of the first shield machine has an outer cylinder in order to drive the outer body. And a plurality of slits oriented in a parallel direction.
[0017]
According to this underground joint type shield machine, for example, a connecting member or the like is attached to the outer cylinder where the output end of an extrusion driving means such as a jack for extruding the outer cylinder of the first shield machine is exposed by a slit. The other end is fixed to the middle drum or a connecting member fixed to the middle drum, and when the extrusion driving means is driven in this state, it becomes possible to push the outer drum against the middle drum. Without complicating the configuration of the first shield machine, it is possible to dispose the pushing drive means in the first shield machine.
[0018]
A ground joint type shield machine according to claim 4 is the ground joint type shield machine according to any one of claims 1 to 3, wherein the cutter disks of the first and second shield machines are provided on the front surface and the outer periphery. A plurality of roller cutters are provided, and the roller cutter in the outer peripheral portion is configured to be accommodated inward from the outer periphery of the cutter disk.
[0019]
According to this underground joint type shield machine, after the roller cutters on the outer periphery of the cutter disks of both shield machines are accommodated inside the outer periphery of the cutter disk, the cutter of the first shield machine is used. The disk is driven backward, and the cutter disk of the second shield machine is pushed out. Therefore, the cutter disk can be pushed out or driven backward without damaging the outer trunk or the like during underground joining.
[0020]
The underground joint type shield machine according to claim 5 is the underground joint type shield machine according to any one of claims 1 to 4, wherein when tunnel tunneling is performed, the outer body, the middle body, and the middle body of the first shield machine The inner cylinder and the outer cylinder and the inner cylinder of the second shield machine are respectively fixed through a plurality of fixing members.
[0021]
According to this underground junction type shield machine, the outer cylinder and the middle trunk of the first shield machine, the middle trunk and the inner trunk, and the outer cylinder and the inner trunk of the second shield machine are fixed by the fixing member when tunneling. However, at the time of underground joining, it is possible to release the fixing between the cylinders by removing the fixing members. Therefore, during underground bonding, labor can be reduced when the outer and inner cylinders of the first shield machine and the inner cylinder of the second shield machine are moved relative to each other.
[0022]
The underground joint type shield machine according to claim 6 is the underground joint type shield machine according to claim 5, wherein the reverse drive means of the first shield machine is composed of a plurality of shield jacks. is there. Since the reverse drive means of the first shield machine also serves as a shield jack for obtaining the propulsion force of the shield machine during tunnel excavation, the structure of the shield machine can be simplified.
[0023]
The underground joint type shield machine according to claim 7 is the underground joint type shield machine according to claim 6, characterized in that the pushing drive means of the second shield machine is composed of a plurality of bent middle jacks. It is. Since the pushing drive means of the second shield machine also serves as a half-fold jack for turning the shield machine during tunnel excavation, the structure of the shield machine can be simplified.
[0024]
The underground joint type shield machine according to claim 8 is the ground joint type shield machine according to any one of claims 1 to 7, wherein the outer side of the inner body is provided at a tip portion of the inner body of the second shield machine. A back agent discharge pipe for discharging the back agent is provided.
According to this underground joint type shield machine, since the backing agent is discharged from the backing agent discharge pipe to the outer surface side of the inner trunk at the time of underground bonding, the water stop performance can be improved.
[0025]
The underground welding method according to claim 9, wherein the first and second shield excavators are excavated in the phase approach direction and joined in the ground, and the first shield excavator on the receiving side includes a cutter disk and A cylindrical inner cylinder, an outer cylinder slidably fitted to the middle cylinder, and an outer peripheral part of a partition wall slidably fitted to a front end portion of the middle cylinder and defining a back side chamber of the cutter disk A cylindrical inner cylinder fixed to the inner cylinder, an extrusion driving means capable of driving the outer cylinder in the direction of digging with respect to the middle cylinder, and the inner cylinder together with the cutter disk and the partition wall in the direction opposite to the direction of digging with respect to the middle cylinder. The retraction drive means capable of retreat drive is provided in advance, and the second shield machine on the penetration side is slidably fitted into the cutter disk, the cylindrical outer cylinder, and the tip of the outer cylinder, and the cutter disk On the outer periphery of the partition that partitions the back side chamber A cylindrical inner cylinder, an extrusion driving means capable of driving the inner cylinder together with a cutter disk and a partition wall in an excavating direction with respect to the outer cylinder, and an outer cylinder mounted on an outer peripheral portion of a tip portion of the inner cylinder. A water stop means that is protected and is provided in advance with water stop means for stopping water between the outer circumference of the outer body of the first shield machine when in the underground connection state, and the first shield is used during tunnel excavation. In the excavator, the middle and outer trunks, and the middle and inner trunks are releasably fixed. In the second shield excavator, the inner and outer trunks are releasably fixed. A first step of releasing the fixing of the inner cylinder and the outer cylinder of the shield machine and extruding the outer cylinder to the inner cylinder in the direction of excavation for a first predetermined distance, and then fixing the outer cylinder to the inner cylinder again; Unlock the inner and inner cylinders of the machine and dig the inner cylinder, cutter disk and bulkhead against the inner cylinder. The second step of re-fixing the inner cylinder to the middle cylinder after retreating the second predetermined distance in the direction opposite to the advance direction, and the second process until the cutter disk of the second shield machine is fitted into the outer cylinder of the first shield machine The second step is to move the two shield machine to the first shield machine, and the outer cylinders of both shield machines are brought into contact with each other, and the inner and outer cylinders of the second shield machine are released from being fixed. The fourth step of extruding the inner cylinder, the cutter disk and the bulkhead against the outer cylinder until the front end portion of the inner cylinder and the water stop means are fitted into the outer cylinder of the first shield machine, and the first shield machine A ground joining method for a ground joint type shield machine, comprising: a fifth step of stopping water between the outer body and the inner body of the second shield machine by water stopping means. In the underground bonding method of this underground bonding type shield machine, substantially the same effect as in the first aspect can be obtained.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. The underground joint type shield machine according to the present embodiment includes the first shield machine 1 on the receiving side shown in FIG. 1 and the second shield machine 2 on the penetration side shown in FIG. The machine is dug in the direction of phase approach and both are joined in the ground.
[0027]
First, the first shield machine 1 will be described. However, front and rear and right and left are explained as front and rear and right and left in the direction of digging.
As shown in FIG. 1, the first shield machine 1 has a cylindrical inner cylinder 5, an outer cylinder 6 slidably fitted on the inner cylinder 5, and a slidable portion at the tip of the inner cylinder 5. And a cylindrical inner cylinder 7 fixed to the outer peripheral portion of the partition wall 10 that defines the back side chamber 9 of the cutter disk 8, a rear cylinder 11 that covers the latter half of the first shield machine 1, 1 Shield machine 1 The cutter disk 8 provided at the front end portion, the cutter drive mechanism 12, the middle cylinder 5 and the rear cylinder 11 are connected to each other so that the middle cylinder 5 can be folded, and at appropriate intervals in the circumferential direction. Can be driven by pushing the outer cylinder 6 in the direction of excavation with respect to the inner cylinder 5. Outer cylinder pushing drive means 18 and inner cylinder 7 are connected to a cutter disk. And a like excavation direction opposite direction to the reverse drivable reverse drive means 19 relative to the middle cylinder 5 together with the partition wall 10.
[0028]
The cutter disk 8 includes a plurality of (for example, four) cutter spokes 21, a fish tail bit 23 fixed to the front center portion, a ring frame 24 that reinforces the outer peripheral portion, and a rotary joint 25 on the rear end side. A main shaft 26 that is mounted and rotatably supported by the partition wall 10, a cutter drum 38 for transmitting the driving force of the cutter driving mechanism 12, and a connecting member 38 a that connects the cutter drum 38 and the cutter spoke 21 are provided. ing. A working chamber 27 for exchanging the roller cutter 30 is formed inside the cutter disk 8. When the tunnel is dug, the working chamber 27 is maintained at atmospheric pressure, and a hydraulic pressure for supplying hydraulic pressure to the slide jack 33. A supply pipe, a muddy agent supply pipe (not shown) for supplying a muddy agent to the roller cutters 22a and 22b, and the like are provided. A check boring valve 28 is also mounted on the rear end side of the main shaft 26 for aligning the shaft centers of the two shield machines during underground bonding. The cutter drum 38 is rotatably supported by a pair of drum members 39a and 39b via an earth and sand seal 40. A plurality of fixed roller cutters 22 a and a plurality of retractable roller cutters 22 b disposed on the outer periphery of the cutter spoke 21 are disposed on the front surface of the cutter spoke 21.
[0029]
The fixed roller cutter 22 a includes a roller cutter 30 and a holding member 32 a that is fitted in a holding hole 31 a formed in the cutter spoke 21 and holds the roller cutter 30, and is fixed to the front surface of the cutter disk 8 so as to be replaceable. Has been.
As shown in FIGS. 1, 2A, and 2B, the retractable roller cutter 22b is a holding member that is slidably held in a holding hole 31b formed in the roller cutter 30 and the cutter spoke 21. 32b, a slide jack 33 for accommodating the roller cutter 30 and the holding member 32b inward from the outer periphery of the cutter disk 8, and a pin 34 with a jack for fixing the holding member 32b to the holding hole 31b when tunneling. Yes. As shown in FIG. 2 (a), the retractable roller cutter 22b is fixed at a position protruding from the cutter disk 8 for excavation as shown in FIG. 2 (a), and as shown in FIG. Further, the fixing by the pin 34 with the jack is released, and the slide jack 33 contracts and is accommodated in the holding hole 31b.
[0030]
The cutter drive mechanism 12 is for driving the cutter disk 8 to rotate. The cutter driving mechanism 12 includes a plurality of hydraulic motors 35, a pinion 36 that is an output shaft of the hydraulic motor 35, a ring gear 37 that meshes with the pinion 36, and a ring gear 37 that transmits rotational driving force to the cutter drum 38. It consists of
[0031]
The partition 10 defines a chamber 9 on the back side of the cutter disk 8 and supports the cutter driving mechanism 12, the cutter disk 8, the soil removal equipment 17, and the like. The partition 10 includes an inner peripheral partition 10a and an outer peripheral partition 10b. The main shaft 26 of the cutter disk 8 is rotatably supported at the center of the inner peripheral partition wall 10a, and the screw conveyor 75 of the soil removal equipment 17 is supported at the lower part of the inner peripheral partition wall 10a. A manhole 41 for an operator to enter and exit the chamber 9 is formed in the upper part of 10a. The outer peripheral partition 10 b is erected vertically at the rear end portion of the inner cylinder 7.
[0032]
The middle body 5 is formed in a cylindrical shape having a length from the tip end portion of the middle bent portion 13 to the back surface of the cutter spoke 21. A central portion in the longitudinal direction of the middle barrel 5 has a plurality of slits 45 at an appropriate interval in the circumferential direction in a direction parallel to the excavation direction, a plurality of stoppers 46 at positions shifted from the slit 45 in the circumferential direction, and the stopper A connecting member 66a connected to the rear end portion of 46 is provided. The front end portion of the bent jack 14a is connected to the rear end portion of the connecting member 66a.
The outer cylinder 6 is formed in a cylindrical shape having the same length as the inner cylinder 5 and an inner diameter that is substantially the same as the outer diameter of the inner cylinder 5, and is fixed to the inner cylinder 5 by a plurality of fixing members 47a. The central portion of the outer cylinder 6 is exposed to the inside by a plurality of slits 45 formed in the inner cylinder 5, and the rear end of the outer cylinder extrusion jack 70 is connected to the exposed portion at the time of underground bonding. (See FIG. 6).
[0033]
The inner cylinder 7 is formed in a cylindrical shape having a length of about ¼ of the length of the inner cylinder 7, and is fixed to the inner cylinder 5 by a fixing member 47b by welding when tunneling.
A plurality of seals 48 are provided between the outer cylinder 6 and the middle cylinder 5 and between the middle cylinder 5 and the inner cylinder 7 to prevent mud from entering.
The rear trunk 11 is formed in a cylindrical shape that covers the latter half of the first shield machine 1. A tail seal 49 is disposed at the rear end portion of the rear cylinder 11, and an erector 16 and the like are mounted inside the front end portion of the rear cylinder 11.
The middle folded portion 13 is for movably connecting the distal end portion of the rear barrel 11 and the rear end portion of the middle barrel 5. The middle folded portion 50 and the middle folded portion 50 are supported in order to support the distal end portion of the middle folded member 50. A receiving seat forming body 52 that forms a partially concave ball seat provided at the rear end of the body 5 is provided. A ring web 51 is fixed to the inner peripheral surface of the rear end portion of the folded member 50 over the entire circumference, and the connecting member 66b is disposed on the front side of the ring web 51 at a position corresponding to the connecting member 66a in the circumferential direction, Fixed at intervals. At the time of tunnel excavation, the direction of excavation is gradually changed by bending the middle folding portion 13 with a plurality of middle folding jacks 14a.
[0034]
A plurality of (e.g., eight) shield jacks 15 are disposed at appropriate circumferential intervals. Each shield jack 15 includes a jack body 55 and an extendable rod 56, and a flange 57 is formed at the rear end of the jack body 55.
Each shield jack 15 has a rod 56 penetrating through the ring web 51 such that the rod 56 can extend rearward and backward, and a flange 57 is fixed to the ring web 51 with a bolt. A spreader 59 is connected to the rear end of the rod 56 of each shield jack 15 via an eccentric fitting 58. A plate member 60 having a plurality of bolt holes is fixed to the spreader 59. At the time of tunnel excavation, the plate member 60 is brought into contact with the mounted segment S to take a reaction force, and a plurality of shield jacks 15 generate excavation thrust, and the excavation thrust is transmitted through the ring web 51 to the first shield excavation. Is transmitted to the machine 1.
[0035]
In addition, the shield jack 15 also serves as the backward drive means 19. When the ground jack is joined, the shield jack 15 is released from the ring web 51 and the plate member 60 is brought into contact with the tip of the segment S. The front end of the shield jack 15 is connected to the fixing member 61 fixed to the rear cylinder 11 so as to be in contact with the outer peripheral partition wall 10b, the connecting members 62a and 62b, the pin 62c, and the connecting rod 63, The cylinder 7 and the cutter disk 8 are driven backward with respect to the middle cylinder 5 (see FIG. 6).
[0036]
A plurality (e.g., eight) of middle-folded jacks 14 a are arranged at appropriate intervals in the circumferential direction at positions different from the shield jack 15. Each of the folded jacks 14a has a rod 65 that can be expanded and contracted rearward, a front end portion of which is connected to a connecting member 66a connected to a rear end portion of the stopper 46 via a pin 67, and a rear end portion of the rod 65 is It is connected to the connecting member 66b via a pin 67.
The outer cylinder push-out drive means 18 is for extruding the outer cylinder 6 with respect to the inner cylinder 5 in the direction of excavation when the shield machine 1 and 2 are joined together in the ground. As shown in FIGS. 6 and 7, the outer cylinder push-out drive means 18 includes an outer cylinder push-out jack 70 having a rod 73, a connecting member 71 a fixed to the folding member 50, and a slit 45 that penetrates the outer cylinder. 6, a connecting member 71 b fixed to 6, and a pin 72. The outer cylinder push-out jacks 70 are arranged at appropriate intervals in the circumferential direction, the rods 73 can be expanded and contracted forward, and are connected to the connecting members 71 a and 71 b via the pins 72. In addition, since this outer cylinder pushing drive means 18 is not used at the time of tunnel excavation, it should just be installed only at the time of underground joining.
[0037]
The earth removal equipment 17 discharges the mud in the chamber 9 out of the tunnel by the screw conveyor 75 and a belt conveyor installed in the tunnel. The screw conveyor 75 includes a spiral auger 76 that is rotationally driven by a drive motor. The auger 76 rotates to suck up the mud in the chamber 9, opens the open / close gate, and discharges it to a belt conveyor extending rearward.
The erector 16 includes an erector frame 78 rotatably supported by a support roller 77, an erector body 79, an erector rotation drive motor 80 for rotating the erector frame 78, and the like. Each time the first shield machine 1 digs for one ring, the segment S for one ring is mounted on the inner surface of the rear trunk 11 on the erector 16.
[0038]
Next, the penetration-side second shield machine 2 will be described. However, front and rear and right and left are explained as front and rear and right and left in the direction of excavation. It should be noted that the same components as those of the first shield machine 1 such as the cutter disk 8A, the partition wall 10A, the rear cylinder 11A, the cutter drive mechanism 12A, the shield jack 15A, the erector 16A, and the earth removal equipment 17A have the same reference numerals. A is attached to and the description is omitted.
As shown in FIG. 3, the second shield machine 2 includes a cylindrical outer cylinder 85 and a partition wall that is slidably fitted to the distal end portion of the outer cylinder 85 and defines the back side chamber 9A of the cutter disk 8A. A cylindrical inner cylinder 86 fixed to the outer periphery of 10A, a plurality of middle-folded jacks 14b disposed at appropriate intervals in the circumferential direction, and the inner cylinder 86 together with the cutter disk 8A and the partition wall 10A. On the other hand, there are an inner cylinder push-out drive means 87 that can be driven to push in the direction of excavation, and a water stop mechanism 88 that is provided on the outer peripheral portion of the front end portion of the inner cylinder 86 and is protected by the outer cylinder 85, A water stop mechanism 88 for stopping water between the inner peripheral surface of the outer cylinder 85 of the first shield machine 1 and a back agent injection means for discharging the back agent to the outer surface side of the inner cylinder 86 in the state. And.
[0039]
The outer diameter of the outer cylinder 85 is substantially the same as the outer diameter of the outer cylinder 6 of the first shield machine 1 and the cutter disk 8 does not need to be retracted. Depending on the length, it is shortened by about 20%. The front end portion of the outer body 85 is formed thick.
The inner cylinder 86 has a length of about 40% of the length of the outer cylinder 85, and has an outer diameter that is substantially the same as the inner diameter of the outer cylinder 85. The front half portion 86a of the inner cylinder 86 is formed to be thick in the latter half portion, and the outer peripheral portion of the partition wall 10A is fixed to the rear half portion 86b of the inner cylinder 86. An annular recess 88a for accommodating the water stop mechanism 88 is formed on the outer peripheral side of the front half portion 86a. In the tunnel excavation state, the inner cylinder 86 is fixed to the outer cylinder 85 via a plurality of fixing members 89, and relative movement with respect to the outer cylinder 85 is restricted.
[0040]
The inner cylinder pushing drive means 87 is for driving the inner cylinder 86 and the like with respect to the outer cylinder 85. The inner cylinder push-out drive means 87 has a plurality of middle-folded jacks 14b, and the distal end portion of the middle-folded jack 14b is connected to a fixing member 86b of the inner cylinder 86 and a connecting member 90a fixed to the outer peripheral side partition wall 10Ab via pins 91. The rear end portion of the bent jack 14 is connected to a connecting member 90 b fixed to the bent member 50 via a pin 91. The middle folding jack 14b is longer than the middle folding jack 14b of the first shield machine 1 in order to push out the inner trunk 86 and the like.
[0041]
The water stop mechanism 88 is accommodated in the annular recess 88 a at the tip of the inner cylinder 86 and is protected by the outer cylinder 85. As shown in FIG. 4, the water stop mechanism 88 includes an annular elastic membrane member 92, an annular seal member 93, and pressurized water injection means including a pressurized water injection pipe 94. The annular elastic membrane member 92 is flexible, and the front end portion and the rear end portion thereof are fixed to the annular recess 88 a with an annular fixing fitting 95. The annular seal member 93 is provided on the outer peripheral side of the annular elastic membrane member 92, and the front end portion is fixed to the annular recess 88 a together with the annular elastic membrane member 92 by a fixing fitting 95. The annular seal member 93 has a structure in which a large number of thin elastically deformable elastic metal plates having a predetermined small width in the circumferential direction are wrapped with synthetic rubber or synthetic resin having excellent elasticity. At the time of underground bonding, as shown in FIG. 4, pressurized water is supplied to the annular elastic membrane member 92 by the pressurized water supply means and expands, and the annular seal member 93 pressed against the annular elastic membrane member 92 is the first. It contacts the inner peripheral surface of the outer cylinder 6 of the shield machine 1 and seals between the inner cylinder 86 and the outer cylinder 6 to prevent mud from entering the tunnel. In addition, when tunneling or the like, the water stop mechanism 88 is not damaged because the intrusion of mud is prevented by the seal 96.
[0042]
The backing agent supply means includes a backing agent discharge pipe 97, a backing agent supply source installed on a rear carriage provided behind the second shield machine 2, and from the backing agent supply source. The supplied backing agent is discharged to the outer surface side of the inner cylinder 86 through the backing agent discharge pipe 97.
[0043]
Next, a description will be given of an underground joining method in which both shield machines 1 and 2 are dug in the phase approach direction and both are joined in the ground.
First, in the first stage, as shown in FIG. 5, the tunnel is dug by the first shield machine 1, and when the first shield machine 1 arrives at the joining point, mud and earth in the chamber 9 are removed. After discharging, the high-concentration mud supply means is used to fill the chamber 9 with high-concentration mud and to secure the face. Next, the rotary joint 25 is removed. Next, in order to push the outer cylinder 6 forward with respect to the cutter disk 8, the retractable roller cutter 22 b is accommodated in the cutter disk 8.
[0044]
Next, in the second stage, as shown in FIG. 6, the mud in the screw conveyor 75 is solidified to remove the latter half of the screw conveyor 75 that is unnecessary for underground bonding, and at the same time, the erector 16 and the like are also removed. . Next, the middle folding member 50 and the middle trunk 5 are welded and fixed so as not to be relatively movable. Next, the fixing member 61 is welded and fixed to the inner surface of the rear barrel 11 so as to abut the tip of the segment S at the position of each spreader 59, and the rod 56 of the shield jack 15 that is the backward drive means 19 is extended. The rear end portion of the rod 56 is fixed to the fixing member 61 with a bolt via the plate member 60, and the front end portion of the shield jack 15 is connected to the outer peripheral partition wall 10b via the connecting members 62a, 62b, the pin 62c, and the connecting rod 63. Secure to. Note that the fixing member 61 fixed to the distal end portion of the segment S also has a water stop function, and prevents water from entering between the segment S and the rear barrel 11. Next, the bent jack 14a, the stopper 46, etc. are removed. Next, the connecting member 71a is welded and fixed to the bent member 50, the connecting member 71b is fixed to the outer body 6 at the position corresponding to each slit 45, and the outer body extrusion jack 70 is connected to both ends. An outer cylinder push-out drive means 18 for installing the outer cylinder 6 is installed on the members 71a and 71b with pins 72. Next, the fixing member 47 a that fixes the outer cylinder 6 and the middle cylinder 5 is removed to release the fixation, and the outer cylinder 6 can be moved relative to the middle cylinder 5.
[0045]
Next, in the third stage, as shown in FIG. 7, the outer cylinder push-out jack 70 of the outer cylinder push-out means 18 is set in the extended state, and the outer cylinder 6 is set to the first predetermined direction with respect to the middle cylinder 5 in the direction indicated by the arrow. Move forward. Under the present circumstances, the front-end | tip part of the outer cylinder 6 is advanced to the advance limit position until it contact | abuts to a natural ground. Next, the inner cylinder 5 and the outer cylinder 6 are fixed by welding to restrict relative movement.
Next, in the fourth stage, as shown in FIG. 8, all the outer cylinder push-out jacks 70, the connecting members 71 a and 71 b and the like are removed, and a closing plate 98 is put on the slit 45 of the inner cylinder 5 to be welded and closed. Next, the fixing member 47b that restricts the relative movement between the middle cylinder 5 and the inner cylinder 7 is removed, and the fixation is released. The bolts connecting the flange 57 of the shield jack 15 and the ring web 51 are removed, so that the shield jack 15 can be moved relative to the middle barrel 5 and the rear barrel 11.
[0046]
Next, in a fifth stage, as shown in FIG. 9, the plurality of shield jacks 15 of the backward drive means 19 are contracted, and the inner cylinder 7, the cutter disk 8, the partition 10, etc. Retreat in the opposite direction (arrow direction). Next, in the sixth stage, as shown in FIG. 10, the connecting rod 63 connecting the shield jack 15 and the outer peripheral partition wall 10 b is removed, the shield jack 15 is extended, and the front end of the shield jack 15 is attached. The fixed connecting member 62a and the connecting member 62b of the outer peripheral partition 10b are directly connected. Next, in the seventh stage, as shown in FIG. 11, the shield jack 15 is again contracted, and the inner cylinder 7, the cutter disk 8, the partition wall 10, etc. are moved in the direction opposite to the direction of digging with respect to the inner cylinder 5 (arrow direction). The inner cylinder 7 and the middle cylinder 5 are welded and fixed again. In this state, the inner cylinder 7, the cutter disk 8, and the partition wall 10 are retracted from the middle cylinder 5 by a second predetermined distance from the time of excavation, and the second shield machine 2 is inserted into the front end portion of the first shield machine 1. An insertion space for this purpose is formed.
[0047]
Next, in the eighth stage, as shown in FIG. 12, the second shield machine 2 excavates the tunnel in an opposing state, and removes the rotary joint 25 of the second shield machine 2 that has approached the underground joint point. Then, check boring is performed from the check boring valve 28 of the first shield machine 1, and the deviation of the relative positions of the first and second shield machines 1 and 2 is checked, and the direction of the second shield machine 2 is adjusted. While approaching, digging. Next, in the ninth stage, as shown in FIG. 13, the front portion of the cutter disk 8 </ b> A of the second shield machine 2 substantially reaches the area excavated by the first shield machine 1 while extending the shield jack 15 </ b> A. Then, the slide jack 33A is contracted to accommodate the retractable roller cutter 22Ab in the cutter disk 8A.
[0048]
Next, in the tenth stage, as shown in FIG. 14, until the cutter disk 8A of the second shield machine 2 is inserted into the insertion space formed at the front end portion of the outer body 6 of the first shield machine 1, Furthermore, the 2nd shield machine 2 is dug, and the front-end | tips of the outer cylinders 6 and 85 of both shield machine 1 and 2 are contact | abutted. Next, the mud and soil in the chamber 9A of the second shield machine 2 are discharged, and the chamber 9A is filled with high-concentration mud water.
Next, in the eleventh stage, as shown in FIG. 15, the fixing member 89 for fixing the outer cylinder 85 and the inner cylinder 86 of the second shield machine 2 is removed to release the fixing, and the inner cylinder 86 is removed from the outer cylinder. It is possible to move relative to 85. Next, the plurality of middle-folded jacks 14b in the inner cylinder push-out driving means 87 are extended, and the front half portion 86a of the inner cylinder 86 and the water stop mechanism 88 are fitted into the front end portion of the outer cylinder 6 of the first shield machine 1. The inner cylinder 86, the cutter disk 8A, and the partition wall 10A are pushed out with respect to the outer cylinder 85 until they are fitted into a shape. At this time, since the tips of the outer cylinders 6 and 85 are in contact with each other, the water stopping device 88 is not exposed to the mud, and the outer cylinder 6 of the first shield machine 1 is used by the tip of the inner cylinder 86. Since the mud on the inner peripheral surface is removed, the water stop device 88 can be fitted into the outer body 6 without biting the mud, so that the water stop performance is improved.
[0049]
Next, in a twelfth stage, as shown in FIG. 16, the mud in the screw conveyor 75A of the second shield machine 2 is solidified, and the latter half of the screw conveyor 75A is removed. At the same time, the erector 16A and the like are removed.
Next, as shown in FIG. 4, the pressurized water supply means supplies pressurized water to the inside of the annular elastic membrane member 92 of the water stop mechanism 88, expands the annular elastic membrane member 92 to the outside, and attaches the annular seal member 93. The water between the outer cylinder 6 of the first shield machine 1 and the inner cylinder 86 of the second shield machine 2 is stopped. Next, the backing agent is discharged to the outer surface side of the inner cylinder 86 and the outer surface side of the outer cylinders 6 and 85 through the backing agent discharge pipe 97 by the backing agent supply means, Stop water in contact with the outer cylinders 6 and 85. Next, in order to stop water between the front end portion of the front half portion 86a of the inner cylinder 86 of the second shield machine 2 and the outer cylinder 6 of the first shield machine 1, a ring-shaped water stop member 99 is welded. Fix it. Next, in the thirteenth stage, as shown in FIG. 17, all the internal structures of both shield machines 1 and 2 are removed to complete the underground joint.
[0050]
The operation and effect of underground bonding by the first and second shield machines 1 and 2 described above will be described.
In the first shield machine 1, the insertion space for the second shield machine 2 to penetrate is formed not only by retreating the cutter disk 8, but also by pushing the outer cylinder 6 in the digging direction by the outer cylinder pushing means 18. Therefore, the retreat distance of the cutter disk 8 is shorter than when the insertion space is secured only by retreating the cutter disk 8. Therefore, the captain of the first shield machine 1 is shortened, and accordingly, the vertical shaft for introducing the first shield machine 1 can be reduced, and the turning performance of the first shield machine 1 is improved. The manufacturing cost of the first shield machine 1 is reduced.
[0051]
Further, the water stop mechanism 88 provided in the second shield machine 2 is protected by the outer trunk 85 of the second shield machine 2 in the tunnel excavation state, and the water stop mechanism 88 is connected at the time of underground bonding. When extruded together with the inner cylinder 86, the tips of the outer cylinders 6 and 85 of both shield machines 1 and 2 are in contact with each other, so that they are protected by the outer cylinders 6 and 85 and the water stop mechanism 88 is excavated. Since the water stop mechanism 88 can be prevented from being damaged without being exposed to mud, the water stop performance is improved. Furthermore, since the water stop mechanism 88 is pushed out together with the inner cylinder 86 of the second shield machine 2, mud accumulated on the outer cylinder 6 of the first shield machine 1 is removed by the tip of the inner cylinder 86. In addition, the mud does not bite between the annular seal member 93 and the outer body 6, and the water stop performance is improved.
[0052]
One end of an outer cylinder extrusion jack 70 for extruding the outer cylinder 6 of the first shield machine 1 is connected to a connecting member 71b fixed to the rear end portion of the outer cylinder 6 exposed by the slit 45, and the other end. Is fixed to the connecting member 71a fixed to the folding member 50, and when the extrusion driving means 18 is driven in this state, the outer cylinder 6 can be pushed out with respect to the middle cylinder 5. Therefore, the first shield machine Without complicating the configuration of 1, the outer cylinder pushing drive means 18 can be easily disposed in the first shield machine 1.
[0053]
During underground bonding, the retractable roller cutters 22b and 22Ab on the outer periphery of the cutter disks 8 and 8A of the two shield machines 1 and 2 are accommodated inside the outer periphery of the cutter disk 8, and then the first shield machine One cutter disk 8 is driven backward, and the cutter disk 8A of the second shield machine 2 is driven to be pushed out. Therefore, at the time of underground bonding, the cutter disk 8 can be driven backward and the cutter disk 8A can be pushed out without damaging the outer cylinders 6 and 85 of the two shield machines 1 and 2.
[0054]
In the tunnel excavation state, the outer members 6 and 5 of the first shield machine 1, the inner and outer shells 5 and 7 of the first shield machine 1, and the outer cylinder 85 and inner cylinder 86 of the second shield machine 2 are fixed by the fixing members 47 a, 47 b and 89. Can be released by simply removing the fixing members 47a, 47b and 89, respectively. Therefore, the process for relatively moving the trunk members relative to each other during the underground joining is simplified.
[0055]
Since the reverse drive means 19 of the first shield machine 1 also serves as the shield jack 15 for obtaining a propulsive force when tunneling, the structure of the first shield machine 1 is simplified. The structure of the second shield machine 2 is simplified because the inner cylinder push-out driving means 87 of the second shield machine 2 also serves as the half-folded jack 14b for turning during tunnel excavation.
The back-filling agent is discharged from the back-filling agent discharge pipe 97 to the outer surface side of the inner cylinder 86 at the time of underground bonding, or the tip of the inner cylinder 86 of the second shield machine 2 and the outside of the first shield machine 1 The water stop performance is improved by stopping the body 6 with the water stop member 99.
[0056]
Next, a modified embodiment in which the present embodiment is partially modified will be described.
1) The outer cylinder push-out drive means 18, the retreat drive means 19, and the inner cylinder push-out means 87 may be configured so that each means operates in the same manner as in the previous embodiment, regardless of the previous embodiment.
2) You may apply the water stop mechanism of a different structure from the water stop mechanism 88. FIG.
3) The first shield machine 1 can reduce the capital investment by removing the backward drive means 19 and the earth removal equipment 17 etc. when the second step is completed and installing it in another shield machine. it can.
The present invention is not limited to the above-described embodiments, and those skilled in the art can implement various modifications to the above embodiments without departing from the spirit of the present invention. The present invention includes those modifications.
[0057]
【The invention's effect】
According to the first aspect of the present invention, the first shield machine is formed not only by retreating the cutter disk but also by extruding the outer cylinder in the drill direction in which the second shield machine is inserted. Therefore, the retreat distance of the cutter disk is shorter than when the insertion space is ensured only by retreating the cutter disk. Therefore, the captain of the first shield machine is shortened, and accordingly, the shaft for introducing the shield machine can be reduced, the turning performance of the shield machine is improved, and the production cost of the shield machine is reduced. Decrease.
Moreover, since the water stop means provided in the second shield machine is protected by the outer body of the second shield machine in the tunnel excavation state, the water stop means is not exposed to the earth and sand. Therefore, the water stop means is not damaged by the excavated mud and the water stop performance is improved.
[0058]
According to invention of Claim 2, since the water stop means is extruded with the inner cylinder of the 2nd shield machine, the mud adhering to the outer cylinder inner surface of the 1st shield machine is removed by the front-end | tip part of the inner cylinder. Therefore, mud does not bite between the water stop means and the inner peripheral surface of the outer trunk of the first shield machine. In addition, since the water stop means is pushed out together with the inner cylinder in a state where the outer cylinders of both shield machines are in contact with each other, the water stop main stage is not exposed to the earth and sand even during underground bonding. That is, in this underground joint type shield machine, the water stop performance is improved without complicating the structure. In addition, the same effects as those of the first aspect can be obtained.
[0059]
According to invention of Claim 3, the output end of extrusion drive means, such as a jack, for extruding the outer cylinder of a 1st shield machine is fixed to the outer cylinder exposed by the slit via a connection member etc. When the other end is fixed to the middle cylinder or a connecting member fixed to the middle cylinder and the extrusion driving means is driven in this state, the outer cylinder can be pushed out with respect to the middle cylinder. Without making the configuration of the excavator complicated, it becomes possible to dispose the extrusion drive means in the first shield excavator. In addition, the same effects as those of the first or second aspect can be achieved.
[0060]
According to the invention of claim 4, after the roller cutter on the outer periphery of the cutter disk of both shield machines is accommodated inward from the outer periphery of the cutter disk at the time of underground bonding, the cutter disk of the first shield machine is retracted. Driven, and pushes out the cutter disk of the second shield machine. Therefore, the cutter disk can be pushed out or driven backward without damaging the outer trunk or the like during underground joining. In addition, the same effects as in claims 1 to 3 can be obtained.
According to the invention of claim 5, during tunnel excavation, the outer member and inner member of the first shield machine, the inner member and inner member of the first shield machine, and the outer member and inner member of the second shield machine are fixed by the fixing member. At the time of intermediate joining, it is possible to release the fixing between the cylinders by removing the fixing members. Therefore, during underground bonding, labor can be reduced when the outer and inner cylinders of the first shield machine and the inner cylinder of the second shield machine are moved relative to each other. In addition, the same effects as in the first to fourth aspects can be achieved.
[0061]
According to the invention of claim 6, the backward drive means of the first shield machine also serves as a shield jack for obtaining the propulsion force of the shield machine when tunneling, thereby simplifying the structure of the shield machine. be able to. In addition, the same effect as that of the fifth aspect can be achieved.
According to the invention of claim 7, the pushing drive means of the second shield machine also serves as a half-folded jack for turning the shield machine when tunneling, thereby simplifying the structure of the shield machine Can do. In addition, the same effects as in the sixth aspect can be achieved.
According to the invention of claim 8, since the backing agent is discharged from the backing agent discharge pipe to the outer surface side of the inner trunk at the time of underground bonding, the water stopping performance can be improved. In addition, the same effects as those of claims 1 to 7 can be obtained.
According to the invention of claim 9, substantially the same effect as that of the invention of claim 1 or 2 can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a first shield machine according to an embodiment of the present invention.
FIG. 2 is a sectional view of a retractable roller cutter.
FIG. 3 is a longitudinal sectional view of a second shield machine.
FIG. 4 is a cross-sectional view of a water stop mechanism.
FIG. 5 is a diagram for explaining a first stage of underground bonding.
FIG. 6 is a diagram for explaining a second stage of underground bonding.
FIG. 7 is a diagram for explaining a third stage of underground bonding.
FIG. 8 is a diagram for explaining a fourth stage of underground bonding.
FIG. 9 is a diagram for explaining a fifth stage of underground bonding.
FIG. 10 is a diagram for explaining a sixth stage of underground bonding.
FIG. 11 is a diagram for explaining a seventh stage of underground bonding.
FIG. 12 is a diagram for explaining an eighth stage of underground bonding.
FIG. 13 is a diagram for explaining a ninth stage of underground bonding.
FIG. 14 is a diagram for explaining a tenth stage of underground bonding.
FIG. 15 is a diagram for explaining an eleventh stage of underground bonding.
FIG. 16 is a diagram for explaining a twelfth stage of underground bonding.
FIG. 17 is a diagram for explaining a thirteenth stage of underground bonding.
[Explanation of symbols]
1 First shield machine
2 Second shield machine
5, 86 middle torso
6, 85 outer trunk
7 Inner trunk
8, 8A Cutter disc
9, 9A chamber
10, 10A Bulkhead
14b Folding jack
15 Shield Jack
18 Outer cylinder extrusion drive means
19 Reverse drive means
22b, 22Ab Retractable roller cutter
45 slits
47a, 47b, 89 fixing member
70 Outer trunk extrusion jack
88 Water stop mechanism

Claims (9)

In a ground joint type shield machine equipped with a first and a second shield machine, these two machined machines are dug in the approaching direction, and both are joined in the ground.
The receiving-side first shield machine has a cutter disk, a cylindrical inner cylinder, an outer cylinder slidably fitted on the middle cylinder, and a slidably fitted inner part at the tip of the middle cylinder; A cylindrical inner cylinder fixed to the outer periphery of the partition wall defining the back side chamber of the cutter disk, extrusion driving means capable of driving the outer cylinder to be pushed in the direction of digging with respect to the middle cylinder, and the inner cylinder as a cutter disk and Retreat drive means capable of retreat drive in the direction opposite to the direction of excavation with respect to the middle barrel together with the partition wall,
The second shield machine on the intrusion side is slidably fitted to the cutter disk, the cylindrical outer cylinder, and the tip of the outer cylinder, and fixed to the outer peripheral part of the partition wall defining the back side chamber of the cutter disk. A cylindrical inner cylinder, an extrusion driving means capable of driving the inner cylinder together with a cutter disk and a partition wall in the direction of digging, and an outer cylinder provided at the outer peripheral portion of the inner cylinder to be protected by the outer cylinder A water stop means for stopping water between the inner periphery of the outer body of the first shield machine when in the ground joint state, Type shield machine. During underground bonding, the outer cylinder of the first shield machine is advanced by a first predetermined distance in the excavation direction and the inner cylinder, the cutter disk, and the partition wall are moved backward by a second predetermined distance in the direction opposite to the excavation direction with respect to the intermediate cylinder, In a state where the cutter disk of the second shield machine is fitted into the front end of the outer cylinder of the first shield machine and the outer cylinders of both shield machines are brought into contact with each other, the inner cylinder of the second shield machine 2. The structure according to claim 1, wherein the front end portion of the inner cylinder and the water stop means are fitted into the outer cylinder of the first shield machine by advancing the cutter disk and the partition wall relative to the outer cylinder. Underground joint type shield machine. 3. The underground joint according to claim 1, wherein a plurality of slits oriented in a direction parallel to the excavation direction are formed in the inner cylinder of the first shield excavator to drive out the outer cylinder. 4. Type shield machine. The cutter disk of the first and second shield machines has a plurality of roller cutters on the front surface and the outer periphery, and is configured to be able to accommodate the roller cutter on the outer periphery from the outer periphery of the cutter disk. The underground joint type shield machine according to any one of claims 1 to 3. When tunneling, the outer and inner torso of the first shield machine, the inner and inner torso, and the outer and inner torso of the second shield machine are fixed via a plurality of fixing members, respectively. The underground joint type shield machine according to any one of claims 1 to 4. 6. The underground joint type shield machine according to claim 5, wherein the reverse drive means of the first shield machine comprises a plurality of shield jacks. The underground driving type shield machine according to claim 6, wherein the pushing drive means of the second shield machine comprises a plurality of middle-folding jacks. 8. The back-filling agent discharge pipe for discharging the back-filling agent to the outer surface side of the inner cylinder is provided at the front end portion of the inner cylinder of the second shield machine. Underground joint type shield machine. In the underground joining method of excavating the first and second shield machines in the direction of phase approach and joining in the ground,
A cutter disk, a cylindrical inner cylinder, an outer cylinder slidably fitted to the middle cylinder, and a slidable inner fitting to a distal end portion of the middle cylinder; A cylindrical inner cylinder fixed to the outer periphery of the partition wall defining the back side chamber of the cutter disk, extrusion driving means capable of driving the outer cylinder to be pushed in the direction of digging with respect to the middle cylinder, and the inner cylinder as a cutter disk and Retraction drive means that can be driven in reverse in the direction opposite to the digging direction with respect to the middle barrel together with the partition wall is provided in advance,
Fixed to the outer periphery of the partition wall that is slidably fitted to the tip of the cutter disk, cylindrical outer cylinder, and outer cylinder, and defines the back side chamber of the cutter disk. A cylindrical inner cylinder, an extrusion driving means capable of driving the inner cylinder together with a cutter disk and a partition wall in the direction of digging, and an outer cylinder provided at the outer peripheral portion of the inner cylinder to be protected by the outer cylinder Water stopping means that was provided in advance and provided with water stopping means for stopping water between the outer peripheral surface of the outer body of the first shield machine when in the ground joint state,
At the time of tunnel excavation, in the first shield machine, the middle and outer trunks, the middle and inner trunks are releasably fixed, and in the second shield machine, the inner and outer trunks are releasably fixed,
At the time of underground bonding, the first and second shield machines are unfixed between the outer cylinder and the outer cylinder, and the outer cylinder is pushed to the inner cylinder in the direction of excavation for a first predetermined distance, and then the outer cylinder is fixed to the inner cylinder again. 1 process,
The inner cylinder and the inner cylinder of the first shield machine are released and the inner cylinder, the cutter disk, and the bulkhead are retracted from the middle cylinder by a second predetermined distance in the direction opposite to the drilling direction. A second step of fixing again;
Until the cutter disk of the second shield machine is fitted into the outer shell of the first shield machine, the second shield machine is dug in the opposite direction to the first shield machine, and the outer cylinders of both shield machines are brought into contact with each other. A third step of
The inner cylinder and the outer cylinder of the second shield machine are released, and the inner cylinder and the cutter disk with respect to the outer cylinder until the front end portion of the inner cylinder and the water stop means fit into the outer cylinder of the first shield machine. And a fourth step of extruding the partition,
A fifth step of stopping water between the outer cylinder of the first shield machine and the inner cylinder of the second shield machine by water stopping means;
A ground joint method for a ground joint type shield machine characterized by comprising:

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