JP4036574B2 - Shield tunneling machine for existing tunnel connection construction - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield machine for connecting an existing tunnel, for example, for docking another new tunnel on the side wall of the existing tunnel.
[0002]
[Prior art]
Conventionally, as this type of shield machine, for example, a configuration found in JP-A-10-280867 has been provided.
That is, in this conventional configuration, the shield machine forms an annular space chamber along the peripheral edge of the front portion of the shield body, and the cutter head can freely rotate inside the inner annular plate portion constituting the annular space chamber. In the annular space chamber, a cutter ring having cutting bits protruding at a plurality of locations on the front edge portion is disposed so as to be rotatable along the peripheral edge of the shield body and slidable in the front-rear direction. At a predetermined position in the circumferential direction of the cutter ring, a detachable engagement hole is formed in the detachable cutter portion of the copy cutter device provided in the cutter head.
[0003]
The cutter ring is connected to the cutter head by operating the extrusion member with a cylinder device and intermittently extruding the cutter ring through a plurality of extrusion transmission members and then fixing with a bolt. This is done by intermittently engaging the cylinder device and knob around the cutter head with the engagement hole of the ring. As a result, the cutter ring is fixed to the cutter head and rotates together with the cutter head, so that the segment of the outer peripheral portion of the existing tunnel is cut.
[0004]
Thereby, docking of another new tunnel as a branch line can be easily performed on the side wall portion of the existing tunnel without damaging the existing tunnel.
[0005]
[Problems to be solved by the invention]
However, according to the conventional shield machine described above, the cutter ring can be connected to the cutter head by intermittently extruding the cutter ring or by intermittently attaching the cylinder device and knob around the cutter head to the engagement hole of the cutter ring. Since it is performed by engaging with each other, i.e., in the form of a scale, it is impossible to continuously advance and retract the cutter ring over a wide range, resulting in inefficiency. Furthermore, in the latter, the cutter head drive part (particularly the slide mechanism) is complicated.
[0006]
Therefore, the invention described in claim 1 of the present invention provides a shield machine for existing tunnel connection construction that can enable continuous advancement and retreat of a wide range of cutter rings and that can simplify the cutter head drive portion. It is intended.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, the shield tunneling machine for existing tunnel connection construction according to claim 1 of the present invention is provided with a cutter head rotatably at a front portion of the shield body, and a front portion of the shield body. the peripheral portion of the annular space chamber formed along, in the annular gas chamber, a holding member connected to the Kattahe' de, and a cutter ring cutting bits projecting from the plurality of positions of the leading edge is provided, this The cutter ring is slidable in the front-rear direction by the holding member and receives and supports the turning torque so that the cutter ring can be rotated integrally with the cutter head, and an operating device that slides back and forth is provided. It is characterized in that it is arranged between the cutter head side and the cutter ring side in the annular space chamber.
[0008]
Therefore, according to the first aspect of the invention, the cutter head is rotated, and the cutter ring is protruded forward by the operating device in a state in which the cutter ring integrated with the cutter head via the holding member is rotated. Thus, the cutter ring is projected forward while being rotated, so that the cutter ring can be pressed against the existing tunnel side and excavation of the side wall portion of the existing tunnel can be started. At that time, the turning torque on the cutter ring side can be suitably received on the cutter head side. Since the cutter ring is installed in the cutter head from the beginning as described above, it is possible to continuously advance and retract the cutter ring over a wide range by the operation of the actuator.
Pair Moreover claim 2 existing tunnel connection shield machine for construction according to the present invention, in the configuration of claim 1, wherein the above, the actuator, which is integrated with the opposite direction the piston rod in the longitudinal direction And is provided at a plurality of locations in the circumferential direction of the cutter ring with the front side connected to the cutter head side and the rear side connected to the cutter ring side .
[0009]
Therefore, according to the invention of claim 2, among the cylinder device groups in the extended state, one of the cylinder device groups in the front and rear is contracted synchronously to project the cutter ring forward, and then the other cylinder device group is By contracting synchronously and causing the cutter ring to protrude further forward, the cutter ring can be protruded forward while rotating. Thus, the cutter ring can be pushed out in two stages by a pair of cylinder devices.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Below, the 1st Embodiment of this invention is described based on FIGS.
1 to 3, reference numeral 1 denotes a refraction type shield main body in a shield machine, and a cutter head 2 is rotatably provided at a front portion thereof. An annular space chamber 5 is formed by the outer skin plate 3 and the inner annular plate 4 along the peripheral edge (outer periphery) of the front portion of the shield body 1. A rotation driving device 6 for rotating the cutter head 2 is provided inside the annular plate 4.
[0011]
The rotation drive device 6 includes a rotation portion 9 disposed on a support portion 7 disposed inward of the annular plate 4 via a swivel bearing 8, and a gear transmission mounted on the support portion 7 side. A rotation drive unit (for example, a hydraulic motor) 11 that rotates the rotation unit 9 via 10 is configured. The cutter head 2 is connected to the tip of the rotating part 9.
[0012]
The cutter head 2 includes a plurality of spoke bodies 22 provided radially and having a plurality of cutter bits 21 provided on both side edges thereof, and a cylinder device for exit and withdrawal (inside each of the spoke bodies 22). An example of an exit / withdrawal device) is constituted by a copy cutter 24, an overcutter 25, and the like which are made to be retractable from the front end surface thereof by 23.
[0013]
In the annular space 5, a cutter ring 31 formed in an annular shape along the skin plate (outer peripheral surface) 3 of the shield body 1 is disposed, and the cutter ring 31 has a plurality of locations on the front edge thereof. A cutting bit 32 is projected. The cutter ring 31 is configured integrally with the cutter head 2 so as to be rotatable and slidable (retractable) in the front-rear direction with respect to the cutter head 2.
[0014]
That is, as shown in FIGS. 1 to 6, holding members 33 are disposed at three places (a plurality of places) in the circumferential direction in the annular space 5, and the holding members 33 are connected to the inner plate portion 33 </ b> A and the left and right sides. The side plate portion 33B, the outer plate portion 33C, the rear plate portion 33D, and the like are formed in a box shape with an open front, and the front end surface thereof is connected to the cutter head 2 side.
[0015]
The cutter ring 31 is positioned between the skin plate 3 and the outer side plate portion 33C. At this time, the outer peripheral surface side of the cutter ring 31 is interposed via a bearing device 34 provided on the inner peripheral surface side of the skin plate 3. The cutter ring 31 is supported slidably via a support device 35 provided on the outer peripheral surface side of the outer plate 33C. .
[0016]
Actuators 41 that slide the cutter ring 31 back and forth are arranged in the annular space 5 and at portions of the holding members 33 (a plurality of locations in the circumferential direction of the cutter ring 31). Here, the actuating device 41 is composed of a pair of cylinder devices 42 and 43 in which the piston rods 42A and 43A are reversed in the front-rear direction, and the cylinder bodies 42B and 43B are parallel and integrated through a connecting member 44. Yes.
[0017]
Then, a forward piston rod 42A in the first cylinder device 42 is connected to the cutter head 2 side via a horizontal pin 45, and a rearward piston rod 43A in the second cylinder device 43 is connected to the horizontal pin 46 or The bracket 47 is connected to the cutter ring 31 side. Here, the bracket 47 is positioned through the long hole 36 in the front-rear direction formed in the outer side plate portion 33C. Here, the first cylinder device 42 group is operated in synchronism, and the second cylinder device 43 group is also operated in synchronism.
[0018]
Then, as both cylinder devices 42 and 43 are extended, the cutter ring 31 is in the retracted position so that the cutting bit 32 is behind the cutter head 2 as shown by the solid line in FIG. As the devices 42 and 43 are contracted, the cutter ring 31 is set to a cutting position (protruding position) in which the cutting bit 32 protrudes from the cutter head 2 by a predetermined distance, as indicated by a virtual line in FIG. It is configured to be able to leave and exit.
[0019]
Further, in order to smoothly move the cutter ring 31 back and forth and to receive the turning torque, a concave key groove 38 is formed on the inner peripheral surface side of the cutter ring 31 and is engaged with the key groove 38. A convex key body 39 is formed on the outer peripheral surface side of the outer side plate portion 33C. The cutting bit 32 provided at the front edge of the cutter ring 31 can excavate the side wall of the existing tunnel T made of reinforced concrete or steel segment.
[0020]
A construction method for connecting and constructing a new tunnel having a small diameter as a branch line to the existing tunnel T using the shield machine having the cutter ring 31 rotatably outside the cutter head 2 as described above will be described below with reference to FIG. Description will be made with reference to FIG.
When forming a through-hole in the side wall of the existing tunnel T by the cutter ring 31, as shown in FIG. 7, when the shield tunneling machine for small-diameter tunnel excavation approaches the existing tunnel T, the shield tunneling machine advances (forward). ) At a predetermined position (closest position to the existing tunnel T). Next, the copy cutter 24 and the over cutter 25 are retracted (retracted) from the outer peripheral surface of the cutter head 2. At this time, the propulsion pump unit and the cutter pump unit are switched and set for side ground joint cutting. And the formation of the through hole is performed by the shield machine.
[0021]
That is, the cutter head 2 is rotated at a high speed by the rotation driving device 6, and the cutter ring 31 integrated with the cutter head 2 via the holding member 33 and the key body 39 is rotated at a high speed. In this state, of the two cylinder devices 42 and 43 in the extended state, for example, the first cylinder device 42 group is contracted synchronously to project the cutter ring 31 forward, and then the second cylinder device 43. The group is contracted in synchronism to cause the cutter ring 31 to protrude further forward.
[0022]
In this way, the cutter ring 31 is protruded forward at a low speed while rotating at a high speed, whereby the cutter ring 31 is pressed against the existing tunnel T side and excavation of the side wall portion of the existing tunnel T is started. At this time, since the key body 39 on the outer plate 33C side is engaged with the key groove 38 on the cutter ring 31 side, the protruding movement of the cutter ring 31 is performed smoothly, and the turning torque on the cutter ring 31 side is also achieved. Can be suitably received on the cutter head 2 side.
[0023]
By excavating such an existing tunnel T, as shown in FIG. 8, after the through-hole formation equivalent part has penetrated and the through-hole H is formed, the existing tunnel is shown in FIG. The excavation removal part (cutting segment part) of the existing tunnel T located in the cutter ring 31 is removed from T.
Thus, when the excavation of the side wall portion of the existing tunnel T is completed, the shield body 1 and the existing tunnel T are connected by the cutter ring 31. Next, after disassembling and removing the shield machine while leaving the cutter ring 31 and the skin plate 3, etc., as shown in FIG. 10, concrete is placed inside the cutter ring 31 and the skin plate 3 and the like. A secondary winding concrete layer 53 is formed, and thus the inner wall surface of the tunnel is covered. Thus, a new tunnel T1 having a small diameter as a branch line can be connected and constructed at a desired location of the existing tunnel T easily and without damaging the existing tunnel T.
[0024]
When excavating the existing tunnel T, for example, when water is ejected from the water outlet at the front edge of the cutter ring 31, excavation waste (cutting waste) is discharged to the outside together with water. At the same time, the excavation part of the cutter ring 31 can be cooled.
Next, a shield machine according to a second embodiment of the present invention will be described with reference to FIGS.
[0025]
The cutter ring 31 is formed long in the front-rear direction, and a bracket 47 is provided at an intermediate part in the front-rear direction. A rear housing member 62 is provided rearward from a portion of the rear end wall portion 61 that connects the skin plate 3 and the rear end of the annular plate 4. The cutter ring 31 is connected to the front end portion of the rear housing member 62 from the inside and outside. A bearing device 63 is provided to support the turning and sliding of the cutter ring 31 while sandwiching it.
[0026]
According to the second embodiment, when the cutter ring 31 is protruded forward at a low speed while rotating at a high speed, the cutter ring 31 is supported by the bearing device 34 and the support device 35, and the inner and outer bearing devices. By performing the rear support by 63, the protruding movement is performed more smoothly and stably.
Next, a shield machine according to a third embodiment of the present invention will be described with reference to FIGS.
[0027]
In other words, the bracket (clevis) 47 and the elongated hole 36 are used both for the structure in which the cutter ring 31 is smoothly projected and the structure in which the turning torque on the cutter ring 31 side is suitably received on the cutter head 2 side. Accordingly, the configuration of the key groove 38 and the key body 39 employed in the first embodiment can be omitted.
[0028]
【The invention's effect】
According to the first aspect of the present invention described above, the cutter head is rotated forward by the operating device in a state where the cutter head is rotated and the cutter ring integrated with the cutter head via the holding member is rotated. By doing so, the cutter ring is projected forward while rotating, so that the cutter ring can be pressed against the existing tunnel side and excavation of the side wall portion of the existing tunnel can be started. At that time, the turning torque on the cutter ring side can be suitably received on the cutter head side. By installing the cutter ring in the cutter head from the beginning as described above , the operation of the operation device enables continuous advancement and retraction over a wide range of the cutter ring, thereby enabling efficient connection construction. The structure of the cutter head drive unit can be simplified.
[0029]
According to the second aspect of the present invention described above , among the cylinder device groups in the extended state, one of the cylinder device groups in the front and rear is contracted synchronously to project the cutter ring forward, and then the other cylinder device By contracting the device group synchronously and causing the cutter ring to protrude further forward, it is possible to protrude forward while rotating the cutter ring. In this manner, the cutter ring can be pushed out in two stages by a pair of cylinder devices, and the strength can be maintained.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a shield machine for tunnel connection construction according to a first embodiment of the present invention.
FIG. 2 is a front view of the shield machine for the existing tunnel connection construction.
FIG. 3 is a longitudinal side view of a portion where an actuator is provided in the shield tunneling machine for the existing tunnel connection construction.
FIG. 4 is a longitudinal front view of a portion where an actuator is provided in the shield tunneling machine for the existing tunnel connection construction.
FIG. 5 is a plan view of a portion where an operating device is disposed in the shield tunneling machine for the existing tunnel connection construction.
FIG. 6 is a cross-sectional plan view of the operating device arrangement portion in the shield tunneling machine for the existing tunnel connection construction.
FIG. 7 is a longitudinal side view at the time of excavation stop in the shield connection construction method to the existing tunnel using the shield tunneling machine for the existing tunnel connection construction.
FIG. 8 is a longitudinal side view at the time of cutting in the shield connection method to the existing tunnel using the shield tunneling machine for the existing tunnel connection construction.
FIG. 9 is a longitudinal side view at the time of removal in a shield connection method for an existing tunnel using the shield tunneling machine for the existing tunnel connection construction.
FIG. 10 is a longitudinal side view at the time of completion of joining in the shield connection construction method to the existing tunnel using the shield tunneling machine for the existing tunnel connection construction.
FIG. 11 shows a second embodiment of the present invention and is a longitudinal side view of an operating device arrangement portion in a shield tunneling machine for existing tunnel connection construction.
FIG. 12 is a plan view of a portion where an actuator is provided in the shield tunneling machine for the existing tunnel connection construction.
FIG. 13 shows a third embodiment of the present invention, and is a vertical side view of an operating device arrangement portion in a shield tunneling machine for existing tunnel connection construction.
FIG. 14 is a plan view of a portion where an operating device is disposed in the shield tunneling machine for the existing tunnel connection construction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shield body 2 Cutter head 3 Skin plate 4 Annular plate 5 Annular space chamber 6 Rotation drive device 21 Cutter bit 24 Copy cutter 25 Overcutter 31 Cutter ring 32 Cutting bit 33 Holding member 33A Inner plate portion 33C Outer plate portion 34 Bearing device 35 Support Device 36 Long hole 38 Key groove 39 Key body 41 Actuating device 42 First cylinder device 42A Piston rod 43 Second cylinder device 43A Piston rod 47 Bracket 53 Secondary winding concrete layer 62 Rear housing member 63 Bearing device T Existing tunnel T1 New tunnel H Through hole

Claims (2)

Rotatably mounted a cutter head in front portion of the shield body, said shield along the periphery of the front of the body to form an annular space chamber, in the annular gas chamber, a holding member connected to the Kattahe' de, before and a cutter ring cutting bits projecting a plurality of locations of the edge is provided by the cutter ring the retaining member, by supporting receiving a slidably and pivotably torque in the back-and-forth direction, the cutter the cutter ring Shield drilling for existing tunnel connection construction, characterized in that an operating device that is configured to rotate integrally with the head and to slide back and forth is arranged between the cutter head side and the cutter ring side in the annular space chamber Machine.   The actuating device consists of a pair of cylinder devices in which the piston rods are integrated in the reverse direction in the front-rear direction, with the front side connected to the cutter head side and the rear side connected to the cutter ring side, with the circumferential direction of the cutter ring The shield tunneling machine for existing tunnel connection construction according to claim 1, wherein the shield tunneling machine is provided at a plurality of locations.

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