JP4955828B1 - Shield type tunnel excavator - Google Patents

Abstract

To provide a shield type tunnel excavator that can be replaced in a short time when a belt conveyor is replaced with a screw conveyor, and can be stopped quickly even when water is urgently discharged.
A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, and a driving force applied to the drive unit. A shield-type tunnel having a propelling portion 18 to be applied and a trunk portion 20 including at least a front trunk portion 32 and a rear trunk portion 36 covering the driving portion 14, the excavation reaction force support portion 16 and the propulsion portion 18 behind the cutter head 12. In the excavation machine 10, a gate plate 60 capable of stopping water is attached to an opening 58 formed in a partition wall 48 located between the chamber 26 side of the cutter head 12 and the body portion 20, and the excavated sediment is conveyed to the gate plate position. The belt conveyor 46 can be inserted into the chamber or a screw conveyor can be mounted.
[Selection] Figure 1

Description

The present invention relates to a shielded tunnel boring machine, in particular, it can be done retrofit from the belt conveyor to the screw conveyor easily and in a short time, even in hardness congested ground about the easily adaptable shield tunneling machine.

  Generally, a tunnel excavator called TBM is used for a mountain tunnel.

  Current TBM types are broadly divided into open TBMs and shielded TBMs.

  Among open TBMs, there are an open type TBM and an improved open type TBM.

  The open type TBM is a main beam type, and propulsion is performed by a thrust jack and a main gripper.

  There may be a roof support or a half shield, but there is no outer shell for the entire body.

  The shield type TBM has an outer shell that is the entire length of the main body, and is composed of a plurality of trunks.

  The main gripper is built in the main body, and in addition to propulsion by the thrust jack and main gripper, it is often equipped with an erector and tail for assembling a liner, segment, etc. at the rear of the aircraft. Can also be promoted.

  And this function expanded TBM application geology.

  The improved open-type TBM incorporates the advantages of both open-type and shield-type TBM types. The open-type TBM is based on the open-type TBM. Sometimes assembled, it is equipped with an auxiliary propulsion jack that secures the reaction force from the liner.

JP 2007-314939 A

  Open type TBM has a roof, etc., but the outer shell is very short, so the ground condition can be grasped at a position close to the face, and when it is necessary to reinforce the ground, it is relatively close to the face at an early stage. However, it is difficult to secure a place for workers to evacuate due to the inability to install segments and liners, while it has the advantage of being able to install support works and ground reinforcement. It is difficult to prevent, and since there is no auxiliary propulsion jack, there is a drawback that propulsion is not possible except for reinforcing the ground on the gripper surface in the case of multiple cracks and soft ground layers.

  In addition, the improved open TBM can be used to grasp ground conditions, install support structures and reinforce the ground at a position close to the face up to the length of the front torso of the shield type TBM. Even in weak ground where reaction force can no longer be obtained, it has the advantage of assembling the entire circumference liner and segment on the front face of the gripper and propelling its end face as reaction force, but it is a place to evacuate workers unless a liner or segment is installed Therefore, it is difficult to prevent accidents due to falling rocks and falling rocks, and the liner and segment have no tail portion, so that they are more difficult to assemble than shielded TBM.

  The shield type TBM has the full length of the outer shell, so workers can evacuate into the aircraft, prevent accidents from falling rocks and falling rocks, and even in vulnerable ground where gripper reaction force can no longer be obtained. There is an advantage that a liner or a segment can be assembled and its end face can be propelled as a reaction force.

  On the other hand, fragile excavated ground containing a lot of earth and sand with groundwater often becomes muddy with cutter rotation, and belt conveyors for conveying excavated earth and sand cannot convey the earth and sand, making it impossible to dig. It is necessary to replace it with a transporter capable of transporting mud and sand such as a screw conveyor.

  For this reason, conventionally, only the partition wall at the belt conveyor attachment point is largely cut open, and when a screw conveyor is attached thereto, it is necessary to newly attach a jig.

  Therefore, the water stop effect is also unstable, and when water is urgently discharged, water cannot be stopped promptly, and each TBM device may be submerged.

Also, the mechanism in the TBM chamber has a bucket for supplying excavated sediment to the belt conveyor, and this bucket causes clogging in the chamber with mud and sediment, making it impossible to dig, so it must be removed was there,
Furthermore, in general, the TBM cutter face plate has a small slit for the excavated sediment to enter the chamber, and the mud excavated sediment may be clogged by this slit and the excavation may become impossible. It was necessary to increase the aperture ratio compared to when TBM was excavated.

  Thus, it takes a lot of time to replace the machine for excavation of the soil on the fragile ground, and in the ground which is hard and soft, the replacement every time has a great influence on the construction period.

  In addition, even if replacement is performed, a TBM equipped with an expansion / contraction mechanism that takes a reaction force on a conventional tunnel used in a mountain tunnel does not have a water stop mechanism, and thus cannot cope with earth and sand ground where groundwater exists.

  The object of the present invention is to make the replacement easily from the belt conveyor to the screw conveyor while taking advantage of the shield type TBM. The replacement can be performed in a short time, and the ground can be replaced even in hard and soft ground. Shield-type tunnel excavator that does not have a major impact on the construction period, has a stable water-stopping effect, can be stopped quickly even when water is urgently discharged, and TBM equipment will not be submerged And providing a tunnel excavation method.

  Another object of the present invention is to provide a fragile ground containing a lot of earth and sand, even in the case of a TBM equipped with an expansion / contraction mechanism that applies a reaction force to the pit wall, even when a propulsion reaction force is applied to the end face of the segment. The object is to provide a shield type tunnel excavator that can be used.

  Still another object of the present invention is to provide a shield type tunnel excavator that can easily replace buckets in a short time in accordance with conveyor replacement for earth and sand transport.

  Still another object of the present invention is to provide a shield type tunnel excavator that can easily and quickly increase the opening ratio of a cutter face plate in response to a fragile ground containing a lot of earth and sand in which groundwater exists. It is in.

(1) In order to achieve the above object, the shield type tunnel excavator of the present invention includes a cutter head, a drive unit that supports and drives the cutter head, and a excavation reaction force support that ensures excavation reaction force against the drive unit. A body part including at least a front body part and a rear body part covering the drive part, the excavation reaction force support part and the propulsion part behind the cutter head In a shield tunneling machine having
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water-stopable gate is configured by slidably attaching a gate plate to an opening for inserting a belt conveyor or a screw conveyor provided in the partition wall,
The excavation reaction force support part has a main gripper provided on the rear trunk part, the front trunk part has a front gripper for trunk part expansion / contraction support, each expansion / contraction part of the trunk part, and the front part Sealing materials are provided between the body portion and the front gripper and between the rear body portion and the main gripper .

  According to the present invention, a gate capable of stopping water is attached to an opening formed in a partition wall, and a belt conveyor for excavating earth and sand conveyance can be inserted into the chamber or a screw conveyor can be mounted at the gate position. When changing from a belt conveyor to a screw conveyor, the replacement can be easily performed without attaching a new jig, the replacement can be performed in a short time, and the replacement can greatly affect the construction period even in hard and soft ground. In addition, the water stop effect is stable, and even when water comes out urgently, the water can be stopped quickly by closing the gate, and each device of the TBM is not submerged.

In addition, with a simple configuration of attaching a gate plate to the opening, replacement can be performed easily, replacement can be performed in a short time, replacement does not have a significant impact on the construction period even in hard and soft ground, The water stop effect is also stable, and even when water is urgently discharged, the water can be stopped quickly by closing the gate plate, and each TBM device is not submerged.

Further, the excavation reaction force support part has a main gripper provided on the rear trunk part, the front trunk part has a front gripper for trunk part expansion / contraction support, each extension part of the trunk part, It is a TBM equipped with a telescopic mechanism that takes a reaction force on the pit wall by providing a sealing material between the front trunk part and the front gripper and between the rear trunk part and the main gripper. Can cope with earth and sand ground where groundwater exists.

(2) Another shield-type tunnel excavator of the present invention includes a cutter head, a drive unit that supports and drives the cutter head, an excavation reaction force support unit that secures an excavation reaction force against the drive unit, and the drive A shield type including a propulsion unit that imparts a propulsive force to the unit, and a trunk unit including at least a front trunk unit and a rear trunk unit that covers the drive unit, the excavation reaction force support unit, and the propulsion unit behind the cutter head In tunnel machine,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed,
The water stopable gate is attached to a belt conveyor or screw conveyor opening provided in the partition wall so that a water stop cylinder can be slid in the front-rear direction, and the water stop cylinder is attached to the cutter head. It is configured to be able to stop water by pressing ,
The excavation reaction force support part has a main gripper provided on the rear trunk part, the front trunk part has a front gripper for trunk part expansion / contraction support, each expansion / contraction part of the trunk part, and the front part Sealing materials are provided between the body portion and the front gripper and between the rear body portion and the main gripper.

According to the present invention, the opening formed in the partition wall, slidably mounted a waterproof cylindrical member in the longitudinal direction, that it allows water stop against the waterproof cylindrical body to the cutter head, (1 ) In addition to the effect of ( 1 ), it is possible to respond more quickly to urgent water discharge than in the case of ( 1 ). For example, in case of emergency water discharge, the water stop cylinder is pressed against the cutter head before moving the belt conveyor to stop the water, then replaced with a screw conveyor, and finally the water stop cylinder is pulled back to stop the water stop. Replacement can be performed in the state.

(3) Still another shield-type tunnel excavator of the present invention includes a cutter head, a drive unit that supports and drives the cutter head, a excavation reaction force support unit that secures excavation reaction force against the drive unit, A shield having a propulsion unit that imparts propulsive force to the drive unit, and a trunk unit including at least a front trunk unit and a rear trunk unit that covers the drive unit, the excavation reaction force support unit, and the propulsion unit behind the cutter head. In the tunnel tunnel machine,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed,
The water-stopable gate is configured by slidably attaching a gate plate to an opening for inserting a belt conveyor or a screw conveyor provided in the partition wall,
A bucket is provided in the chamber so as to project excavated earth and sand in the chamber to a belt conveyor inserted into the chamber.
The bucket is configured to be foldable to the partition wall side when excavating the sand using the screw conveyor.

(4) Further, another shield-type tunnel excavator of the present invention includes a cutter head, a drive unit that supports and drives the cutter head, a excavation reaction force support unit that secures a excavation reaction force against the drive unit, A propulsion unit that applies a propulsive force to the drive unit; and a trunk unit including at least a front trunk unit and a rear trunk unit that covers the drive unit, the excavation reaction force support unit, and the propulsion unit behind the cutter head. In shield tunneling machines,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed,
The water stopable gate is attached to a belt conveyor or screw conveyor opening provided in the partition wall so that a water stop cylinder can be slid in the front-rear direction, and the water stop cylinder is attached to the cutter head. It is configured to be able to stop water by pressing,
A bucket is provided in the chamber so as to project excavated earth and sand in the chamber to a belt conveyor inserted into the chamber.
The bucket is configured to be foldable to the partition wall side when excavating the sand using the screw conveyor.

According to the inventions of (3) and (4), compared with the case of (1) or (2), there is a bucket for transferring excavated earth and sand in the chamber to the belt conveyor inserted in the chamber. Protruding into the chamber, the bucket is foldable to the partition wall side when excavating the sand using the screw conveyor, so that the bucket is originally for transferring the earth and sand in the chamber onto the belt conveyor, If the excavation requires a conveyor, the movement of the sediment will be hindered, so it will be necessary to remove it. Can be reduced.

(5) Still another shield-type tunnel excavator of the present invention includes a cutter head, a drive unit that supports and drives the cutter head, a excavation reaction force support unit that secures excavation reaction force against the drive unit, A shield having a propulsion unit that imparts propulsive force to the drive unit, and a trunk unit including at least a front trunk unit and a rear trunk unit that covers the drive unit, the excavation reaction force support unit, and the propulsion unit behind the cutter head. In the tunnel tunnel machine,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed,
The water-stopable gate is configured by slidably attaching a gate plate to an opening for inserting a belt conveyor or a screw conveyor provided in the partition wall,
The face plate of the cutter head has a detaching part for removing the sand and sand when excavating using a screw conveyor to increase the opening ratio of the face plate,
The face plate is provided with a rotary joint for adding a mud material.

(6) Further, another shield-type tunnel excavator of the present invention includes a cutter head, a drive unit that supports and drives the cutter head, a excavation reaction force support unit that secures a excavation reaction force against the drive unit, A propulsion unit that applies a propulsive force to the drive unit; and a trunk unit including at least a front trunk unit and a rear trunk unit that covers the drive unit, the excavation reaction force support unit, and the propulsion unit behind the cutter head. In shield tunneling machines,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed,
The water stopable gate is attached to a belt conveyor or screw conveyor opening provided in the partition wall so that a water stop cylinder can be slid in the front-rear direction, and the water stop cylinder is attached to the cutter head. It is configured to be able to stop water by pressing,
The face plate of the cutter head has a detaching part for removing the sand and sand when excavating using a screw conveyor to increase the opening ratio of the face plate,
The face plate is provided with a rotary joint for adding a mud material.

According to the inventions of these (5) and (6), compared with the inventions of (1) to (4), the face plate of the cutter head is removed during earth excavation using a screw conveyor to increase the face plate opening ratio. In addition to having a desorption part, the face plate is provided with a rotary joint for injecting mud material, so that the opening ratio of the face plate of the cutter head is very narrow under normal specifications, and the excavated soil is smoothly taken in. However, the fluidity of the sand on the face plate side is not good, but by removing the detachable part and increasing the opening ratio of the face plate, the excavated earth and sand can be taken in smoothly, and for adding mud material to the face plate By providing this rotary joint, the fluidity of the earth and sand can be promoted.

(7) In the present invention, the excavation reaction force support portion includes a main gripper provided on the rear trunk portion, the front trunk portion includes a front gripper for trunk expansion and contraction support, and the trunk portion Any one of (3) to (6) above, wherein a sealing material is provided between each of the expansion / contraction portions, between the front body portion and the front gripper, and between the rear body portion and the main gripper. It can be set as the shield type tunnel excavator of a crab.

It is a schematic longitudinal cross-sectional view of the shield type tunnel excavator concerning one embodiment of the present invention. It is an expanded sectional view which follows the II-II line of FIG. It is an expanded sectional view at the time of use of the belt conveyor of FIG. FIG. 4 is an enlarged sectional view corresponding to FIG. 3 when using a screw conveyor. The modification of a gate is shown and it is sectional drawing at the time of water stop. It is sectional drawing at the time of open | release of FIG. It is an expansion perspective view of the chamber part which shows the use condition of a bucket. It is a perspective view similar to FIG. 7 which shows the folded state of a bucket. It is a front view of the cutter head at the time of belt conveyor use. It is a front view of the cutter head at the time of screw conveyor use. It is a longitudinal cross-sectional view which shows the lifting state of the belt conveyor at the time of replacement | exchange. It is a longitudinal cross-sectional view which shows the state which pulls out a belt conveyor from the state of FIG. It is a longitudinal cross-sectional view which shows the state which hangs a belt conveyor from the state of FIG. It is a longitudinal cross-sectional view which shows the state which conveys a screw conveyor from the state of FIG. It is a longitudinal cross-sectional view which shows the state which attaches a screw conveyor to the opening part of a partition from the state of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-15 is a figure which shows the shield type tunnel excavator concerning one Embodiment of this invention.

FIG. 1 is a schematic longitudinal sectional view of a shield type tunnel excavator according to an embodiment of the present invention.
The shield-type tunnel excavator 10 includes a cutter head 12, a drive unit 14, an excavation reaction force support unit 16, a propulsion unit 18, and a trunk unit 20 (a front trunk unit 32, a middle trunk unit 34, and a rear trunk unit 36). ).

  The cutter head 12 is equipped with a plurality of disk cutters 22 for crushing rocks, and crushes the face 24 by rotating to take in excavated sediment (sludge) into the chamber 26.

  The drive unit 14 supports and drives the cutter head 12, and the cutter head support bearing 28 provided between the barrel unit 20 (front barrel unit 32) and the barrel unit 20 (front barrel unit 32). And a cutter head driving device 30 provided.

  The excavation reaction force support portion 16 is pressed against the pit wall to secure an excavation reaction force against the drive unit 14 and has a main gripper 40.

  Further, after the excavating reaction force is obtained by the main gripper 40 and propelling force is applied by the thrust jack 42 for excavation, the front trunk portion 32 is used as an expansion / contraction reaction force support portion for returning the expansion / contraction portion of the trunk portion 20 to its original state. A front gripper 38 is provided.

  The propulsion unit 18 includes a thrust jack 42 that couples the rear barrel portion 36 that imparts propulsive force to the drive unit 14 and the front barrel portion 32.

  As described above, the body portion 20 includes a plurality of bodies including the front body portion 32, the middle body portion 34, and the rear body portion 36, and covers the excavation reaction force support portion 16 and the propulsion portion 18.

  A partition wall 48 is provided on the front end surface of the front body portion 32, and a bucket 44 is provided in the partition wall 48 so as to protrude into the chamber 26, and excavated earth and sand (sludge) taken into the chamber 26 is formed in the cutter head 12. The excavated earth and sand (sludge) thrown up into the bucket 44 by being lifted upward by rotation is supplied onto the belt conveyor 46 inserted into the chamber 26 via the bucket 44, and the belt conveyor. From 46, it is transported out of the mine by a Zuritro transport vehicle.

  An erector 50 is provided in the rear trunk portion 36, and the segment 52 is assembled behind the rear trunk portion 36.

  Further, a shield jack 54 for auxiliary propulsion is provided in the rear trunk portion 36, and a propulsive force can be obtained by using the end face of the assembled segment 52 as a reaction force.

  A tail seal 56 is provided at the rear portion of the rear trunk portion 36.

  In the present embodiment, a gate plate 60 as shown in FIGS. 2 to 4 is slidably attached to the opening 58 formed in the partition wall 48 as a gate capable of stopping water. A belt conveyor 46 for conveying excavated earth and sand is inserted into the chamber 26 in the section 58, or the screw conveyor 62 shown in FIG.

  The opening 58 is provided with a frame capable of holding the gate plate 60 so as to be slidable and capable of stopping water, and is slidable along the frame.

  The gate plate 60 can be opened and closed by a gate plate opening / closing jack 64.

  As described above, the gate plate 60 capable of stopping water is attached to the opening 58 formed in the partition wall 48, and the belt conveyor 46 for conveying excavated earth and sand is inserted into the chamber 26 at the position of the opening 58 or the screw conveyor 62 is mounted. By making it possible, when replacing the belt conveyor 46 to the screw conveyor 62, the replacement can be easily performed without attaching a new jig, and the replacement can be performed in a short time, even in a hard and softly congested ground. Even if the replacement does not have a significant impact on the construction period, and the water stop effect is stable and the water is urgently discharged, it is possible to stop the water quickly by closing the gate plate 60. There is no submergence.

  5 and 6 show a modified example of the water stopable gate. The water stopable gate is provided in the partition wall 48 or the opening 58 for inserting the screw conveyor 62 provided in the partition wall 48. A water stopping cylinder 68 is slidably attached in the front-rear direction along a cylindrical packing case 66 provided in 48, and the water stopping cylinder 68 is pressed against a packing 70 provided on the back side of the cutter head 12. The water can be stopped.

  The slide movement of the water stop cylinder 68 is performed by a slide jack 72.

  The belt conveyor 46 or the screw conveyor 62 can be inserted into and installed in the water stop cylinder 68.

  In this manner, the water stop cylinder 68 is slidably attached to the opening 58 formed in the partition wall 48 in the front-rear direction, and the water stop cylinder 68 can be pressed against the packing 70 of the cutter head 12 to stop the water. By doing so, it is possible to respond more promptly to more urgent water discharge.

  For example, at the time of emergency water discharge, the water stop cylinder 68 is pressed against the packing 70 of the cutter head 12 before moving the belt conveyor 46 to stop the water, then replaced with the screw conveyor 62, and finally the water stop cylinder. By pulling back 68, replacement can be performed while the water is still stopped.

  Moreover, in this Embodiment, each expansion-contraction part 20A, 20B of the trunk | drum 20, 38A between the front trunk | drum 32 and the front gripper 38, 40A between the rear trunk | drum 36 and the main gripper 40, and a cutter head The seal members 21, 39, 41, and 29 are provided on the periphery 28A of the support bearing 28, respectively, and the tail seal 56 is provided on the tail portion of the rear trunk portion 36, so that a reaction force is exerted on the pit wall to expand and contract. Even a TBM equipped with can handle earth and sand ground with groundwater.

  As the seal materials 21, 39, 41, 29 and the tail seal 56, those commonly used in shield machines and the like can be adopted, and details thereof are omitted here.

  Moreover, in this Embodiment, as shown in FIG.4, FIG.8, FIGS.12-15, the bucket 44 which delivers the excavated earth and sand in the chamber 26 with respect to the belt conveyor 46 inserted in the chamber 26 is shown. The bucket 44 is originally intended to move the earth and sand in the chamber 26 onto the belt conveyor 46 by making it foldable to the partition wall 48 side when excavating the earth and sand using the screw conveyor 62, and is an earth and sand excavation requiring the screw conveyor 62. If this happens, it will obstruct the movement of the earth and sand, so it must be removed, and this can be folded to the side of the partition wall 48 when excavating the earth and sand using the screw conveyor so that the replacement time can be reduced. Yes.

  Further, in the present embodiment, as shown in FIGS. 9 and 10, a plurality of detaching portions 76 for increasing the face plate opening ratio by removing the earth and sand using the screw conveyor 62 during excavation are provided on the face plate 74 of the cutter head 12. In the normal specification, the opening ratio of the face plate 74 of the cutter head 12 is very narrow, and the excavated earth and sand cannot be taken in smoothly. By removing the detachable portion 76 and increasing the opening ratio of the face plate 74, the excavated earth and sand can be removed. As shown in FIGS. 1, 3 to 6, and 11 to 15, by providing a rotary joint 78 for injecting a mud material on the face plate 74, The fluidity of earth and sand can be promoted.

  Next, a tunnel excavation method using the shield type tunnel excavator 10 in the present embodiment will be described with reference to FIGS.

  First, in a state where the main gripper 40 which is the excavation reaction force support portion 16 is pressed against the pit wall to ensure the excavation reaction force, the cutter head 12 is driven to rotate by the drive unit 14 and the face 24 is excavated by the cutter head 12. The thrust is applied by the thrust jack 42 of the propulsion unit 18 to perform excavation.

  The excavated earth and sand generated during the excavation is taken into the chamber 26 in the cutter head 12, and the taken excavated earth and sand is passed through a bucket 44 provided in the chamber 26 to a belt conveyor 46 whose tip is inserted into the chamber 26 from the partition wall 48. Supplied and taken out of the pit from the intake belt conveyor 46 into the trunk portion 20 by a Zuritro transport vehicle.

  When the soil changes during excavation and fragile ground such as crushed soil or crushed material appears, and when it becomes necessary to take in the excavated sediment by the screw conveyor 62, the excavated sediment by the belt conveyor 46 Is replaced with the intake of excavated soil by the screw conveyor 62.

  This conveyor replacement is performed in the following steps.

  First, as shown in FIG. 11, the bucket 44 is folded and stored on the partition wall 48 side.

  The belt conveyor 46 is supported by a belt conveyor support 80 whose length can be adjusted at the front end side, and the length of the belt conveyor support 80 is adjusted to lift the front end of the belt conveyor 46.

  Next, as shown in FIG. 12, with the belt conveyor 46 being lifted and supported, the belt conveyor 46 is pulled backward by the belt conveyor slide mechanism 82 disposed at the rear of the belt conveyor 46, and is opened from the opening 58 of the partition wall 48. Pull out.

  Next, as shown in FIG. 13, the belt conveyor support 80 is adjusted, and the leading end side of the pulled-out belt conveyor 46 is lowered below the opening 58 of the partition wall 48.

  In this case, the height on the front end side of the screw conveyor 46 may be set so that the center axis of the screw conveyor 46 coincides with the center of the opening 58.

  Next, as shown in FIG. 14, the screw conveyor 62 is transported to the opening 58 using the belt conveyor 46 whose tip is positioned below the opening 58 as the transporting means.

  Then, as shown in FIG. 15, the screw conveyor 62 may be fixed to the partition wall 48 by inserting the tip of the screw conveyor 62 into the opening 58 and mounting it at the position of the opening 58.

As described above, the gate plate 60 capable of stopping water is attached to the opening 58 formed in the partition wall 48, and the belt conveyor 46 for conveying excavated earth and sand is inserted into the chamber 26 at the position of the opening 58 or the screw conveyor 62 is mounted. By making it possible, when replacing the belt conveyor 46 to the screw conveyor 62, the replacement can be easily performed without attaching a new jig, and the replacement can be performed in a short time, even in a hard and softly congested ground. Replacement does not have a major impact on the construction period.
In addition, the belt conveyor 46 is pulled out from the opening 58 and suspended below the opening 58, and the screw conveyor 62 is conveyed using the belt conveyor 46, whereby the replacement work can be performed efficiently.

  Further, when water is discharged from the face 24, the belt conveyor 46 is pulled out from the opening 58, the gate plate 60 is closed and water is stopped, and after water discharge prevention processing is performed, the gate plate 60 is opened and the screw conveyor 62 is mounted. By performing the work, the replacement work can be performed in a safe state against water discharge, and the water stop effect is stable, and even if there is an emergency water discharge, it can be stopped quickly by closing the gate plate. Water can be used, and each TBM device is not submerged.

  5 and 6, the water stop cylinder 68 is disposed in the front-rear direction in the opening 58 for inserting the belt conveyor 46 or the screw conveyor 62 provided in the partition wall 48. Since the water stop cylinder 68 is slidably attached and pressed against the packing 70 provided on the cutter head 12 so that the water can be stopped, the water stop cylinder 68 is attached to the cutter head 12 when the water stop is replaced. It is possible to take in excavated earth and sand with the screw conveyor 62 by moving the water stop cylinder 68 rearward after the replacement work is completed, and the belt 70 can be taken in. Before moving the conveyor 46, the water stop cylinder 68 is pressed against the packing 70 of the cutter head 12 to stop the water, and then replaced with the screw conveyor 62. By pulling back the waterproof cylindrical body 68, it is possible to retrofit remains waterproof state.

  In particular, in case of urgent water discharge, water can be stopped by simply sliding the water stop cylinder 68 while the belt conveyor 46 and the screw conveyor 62 are attached, and more quickly.

  Further, when excavating the sand using the screw conveyor 62, the bucket 44 is folded to the partition wall 48 side, so that excavation of the sand and sand that required the screw conveyor 62 does not require removal of the bucket 44, which reduces the exchange time. can do.

  Further, when the earth and sand are excavated using the screw conveyor 62, the detachable portion 76 provided on the face plate 74 of the cutter head 12 is removed, and the detachable portion is injected into the face plate 74 side using the rotary joint 78. 76 can be removed to increase the opening ratio of the face plate 74 to smoothly take in the excavated earth and sand, and by adding a mud material to the face plate 74 using a rotary joint, the fluidity of the earth and sand can be promoted. it can.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the above-described embodiment, the belt conveyor support whose length can be adjusted is used for lifting the belt conveyor. However, the present invention is not limited to this example, and a hoisting machine using a jack, a wire, a chain, or the like can be used. It is.

  Moreover, the bucket for taking in excavated sediment provided in the chamber can be folded manually or automatically to the partition wall side by a hinge structure or a bolt fastening method.

  Further, the detachable portion for increasing the aperture ratio of the cutter surface plate can be made detachable by a bolt / nut method or a hydraulic method.

DESCRIPTION OF SYMBOLS 10 Shield type tunnel excavator 12 Cutter head 14 Drive part 16 Excavation reaction force support part 18 Propulsion part 20 Trunk part 24 Face 32 Front trunk part 34 Middle trunk part 36 Rear trunk part 48 Bulkhead 58 Opening part 60 Gate plate 62 Screw conveyor 68 Still water cylinder 74 Face plate 76 Detachment part 78 Rotary joint

Claims (7)

A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, a propulsion unit that applies propulsive force to the drive unit, and the cutter In a shield type tunnel excavator having a body including at least a front trunk and a rear trunk covering the drive unit, the excavation reaction force support unit and the propulsion unit behind the head,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water-stopable gate is configured by slidably attaching a gate plate to an opening for inserting a belt conveyor or a screw conveyor provided in the partition wall ,
The excavation reaction force support part has a main gripper provided on the rear trunk part, the front trunk part has a front gripper for trunk part expansion / contraction support, each expansion / contraction part of the trunk part, and the front part A shield-type tunnel excavator, characterized in that a sealing material is provided between the trunk portion and the front gripper and between the rear trunk portion and the main gripper . A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, a propulsion unit that applies propulsive force to the drive unit, and the cutter In a shield type tunnel excavator having a body including at least a front trunk and a rear trunk covering the drive unit, the excavation reaction force support unit and the propulsion unit behind the head,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water stopable gate is attached to a belt conveyor or screw conveyor opening provided in the partition wall so that a water stop cylinder can be slid in the front-rear direction, and the water stop cylinder is attached to the cutter head. It is configured to be able to stop water by pressing ,
The excavation reaction force support part has a main gripper provided on the rear trunk part, the front trunk part has a front gripper for trunk part expansion / contraction support, each expansion / contraction part of the trunk part, and the front part A shield-type tunnel excavator, characterized in that a sealing material is provided between the trunk portion and the front gripper and between the rear trunk portion and the main gripper . A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, a propulsion unit that applies propulsive force to the drive unit, and the cutter In a shield type tunnel excavator having a body including at least a front trunk and a rear trunk covering the drive unit, the excavation reaction force support unit and the propulsion unit behind the head,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water-stopable gate is configured by slidably attaching a gate plate to an opening for inserting a belt conveyor or a screw conveyor provided in the partition wall ,
A bucket is provided in the chamber so as to project excavated earth and sand in the chamber to a belt conveyor inserted into the chamber.
The shield-type tunnel excavator characterized in that the bucket is foldable to the partition side during earth and sand excavation using the screw conveyor . A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, a propulsion unit that applies propulsive force to the drive unit, and the cutter In a shield type tunnel excavator having a body including at least a front trunk and a rear trunk covering the drive unit, the excavation reaction force support unit and the propulsion unit behind the head,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water stopable gate is attached to a belt conveyor or screw conveyor opening provided in the partition wall so that a water stop cylinder can be slid in the front-rear direction, and the water stop cylinder is attached to the cutter head. It is configured to be able to stop water by pressing ,
A bucket is provided in the chamber so as to project excavated earth and sand in the chamber to a belt conveyor inserted into the chamber.
The shield-type tunnel excavator characterized in that the bucket is foldable to the partition side during earth and sand excavation using the screw conveyor . A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, a propulsion unit that applies propulsive force to the drive unit, and the cutter In a shield type tunnel excavator having a body including at least a front trunk and a rear trunk covering the drive unit, the excavation reaction force support unit and the propulsion unit behind the head,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water-stopable gate is configured by slidably attaching a gate plate to an opening for inserting a belt conveyor or a screw conveyor provided in the partition wall ,
The face plate of the cutter head has a detaching part for removing the sand and sand when excavating using a screw conveyor to increase the opening ratio of the face plate,
The shield type tunnel excavator characterized in that the face plate is provided with a rotary joint for adding a mud material . A cutter head, a drive unit that supports and drives the cutter head, a digging reaction force support unit that secures a digging reaction force against the drive unit, a propulsion unit that applies propulsive force to the drive unit, and the cutter In a shield type tunnel excavator having a body including at least a front trunk and a rear trunk covering the drive unit, the excavation reaction force support unit and the propulsion unit behind the head,
A water-stoppable gate is attached to an opening formed in a partition wall located between the chamber side of the cutter head and the body portion, and a belt conveyor for excavating earth and sand is inserted into the chamber at the gate position. Or screw conveyor can be installed ,
The water stopable gate is attached to a belt conveyor or screw conveyor opening provided in the partition wall so that a water stop cylinder can be slid in the front-rear direction, and the water stop cylinder is attached to the cutter head. It is configured to be able to stop water by pressing ,
The face plate of the cutter head has a detaching part for removing the sand and sand when excavating using a screw conveyor to increase the opening ratio of the face plate,
The shield type tunnel excavator characterized in that the face plate is provided with a rotary joint for adding a mud material . The excavation reaction force support part has a main gripper provided on the rear trunk part, the front trunk part has a front gripper for trunk part expansion / contraction support, each expansion / contraction part of the trunk part, and the front part The shield-type tunnel excavator according to any one of claims 3 to 6, wherein a sealing material is provided between the trunk portion and the front gripper and between the rear trunk portion and the main gripper.