JP3637166B2 - Segment perfect circle holding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a segment perfect circle holding device that press-contacts a plurality of segments assembled on the inner wall surface of a tunnel and holds the segment in a perfect circle state, and a tunnel excavator equipped with the segment perfect circle retention device About.
[0002]
[Prior art]
FIG. 4 shows an outline of a conventional segment perfect circle holding device.
[0003]
As shown in FIG. 4, a conventional segment perfect circle holding device 100 is mounted on a rear portion of an excavator body (not shown). That is, a beam 101 is fixed to the rear portion of the excavator body, and a pair of left and right rails 102 (only one is shown in FIG. 4) is attached to the beam 101, and the rail 102 is fixed by a flat wheel 103. A support base 104 is supported to be movable. In addition, the support base 104 can be moved by a predetermined amount to the side in the traveling direction by the guide member 105. An outer cylinder 106 is fixed on the support base 104, and an inner cylinder 107 is supported in the outer cylinder 106 so as to be axially movable. The inner cylinder 107 is a lifting jack 108 attached to the outer cylinder 106. Can be moved up and down. The lower end of the support beam 110 is connected to the upper end portion of the inner cylinder 107 by a connecting pin 109. The support beam 110 has an intermediate portion that is curved in the same manner as the inner peripheral surface of the existing segment S, and a pressure contact member 111 that is in pressure contact with the inner peripheral surface of the existing segment S is fixed to the upper surface portion.
[0004]
Therefore, the shield jack is expanded and contracted while rotating the cutter head (not shown), and the excavator main body moves forward by the pressing reaction force against the segment S, so that the ground is excavated to form a tunnel. The segment S is assembled in a ring shape on the inner wall surface of the tunnel . At this time, the segment perfect circle holding device 100 follows the wheel 103 rolling on the rail 102 as the excavator body moves forward. Then, the elevating jack 108 is extended at a predetermined position and the inner cylinder 107 is raised with respect to the outer cylinder 106, whereby the support beam 110 fixed to the inner cylinder 107 is raised, and the existing segment S is formed on the inner peripheral surface. The circularity of the existing segment S is maintained by pressing the pressure contact member 111.
[0005]
[Problems to be solved by the invention]
By the way, in tunnel excavation work by shield excavator, tunnel construction of sharp curve construction has been increasing in recent years. In the case of such a sharply-curved tunnel excavation work, in the conventional segment perfect circle holding device 100 described above, the segment assembled on the inner wall surface of the tunnel following the tunnel excavation work is in a perfect circle state. It was difficult to hold on.
[0006]
That is, when a tunnel with a sharp curve is excavated by a shield excavator, the excavator body will dig along the sharp curve, and the supporting beam supported by the support platform 104 that runs on the existing segment and the pair of rails 102. The position in the left-right direction with respect to 110 (pressure contact member 111) is shifted. In this case, conventionally, the support base 104 is moved by a predetermined amount to the side in the traveling direction by the guide member 105. However, in such a method, the support base 104 is moved to the side by the guide member 105 within a range in which the wheel 103 can travel without falling on the rail 102, and there is a limit in the amount of movement, and sharp curve construction is performed. Could not cope with the tunnel construction.
[0007]
An object of the present invention is to solve such a problem, and an object of the present invention is to provide a perfect circle holding device for a segment and a tunnel excavator that can cope with tunnel construction of sharp curve construction.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the segment perfect circle retaining device of the present invention is a segment perfect circle retainer that presses against a number of segments assembled on the inner wall surface of the tunnel and holds the segment in a perfect circle state. A pair of left and right rails arranged along the longitudinal direction in the tunnel , a pair of left and right support bases movably supported along the pair of left and right rails, and a pair of left and right support bases, respectively. A pair of left and right lifting means, a pair of left and right support brackets supported by the pair of left and right lifting means , respectively, and a pair of left and right support brackets, and lower portions thereof are respectively connected to the pair of left and right support brackets. And a segment support beam supported by a predetermined amount of movement along a lateral direction of the tunnel via a slide mechanism.
[0009]
Therefore, as the assembly of the segments on the inner wall surface of the tunnel, each of the support platform is traveling along a rail disposed in the tunnel, the segments support beam via a support bracket by lifting means at a predetermined position movement Then, the existing segment is held in a perfect circle by being pressed against the inner wall surface of the existing segment. When the tunnel has a sharp curve shape, the segment support beam is attached to each support base via the support bracket. By moving along the lateral direction of the tunnel by the slide mechanism, the segment support beam can be reliably pressed against the inner wall surface of the existing segment which has become a sharp curve, and the existing segment is held in a perfect circle.
[0010]
The tunnel excavator of the present invention includes a tubular excavator main body, a cutter head rotatably attached to the front portion of the excavator main body, cutter head driving means for driving and rotating the cutter head, Propulsion means provided in the excavator body, segment assembling means for assembling the segment mounted on the rear part of the excavator body and carried into the tunnel to the inner wall surface of the tunnel, and assembled to the inner wall surface of the tunnel A tunnel excavator comprising a segment perfect circle holding device that presses against a number of attached segments and holds the segment in a perfect circle state, wherein the perfect circle retention device includes a pair of right and left disposed along the longitudinal direction of the tunnel. Rails, a pair of left and right support bases movably supported along the pair of left and right rails, a pair of left and right lifting means respectively mounted on the pair of left and right support bases, A pair of left and right support brackets which are vertically movably supported respectively by the pair of right and lifting means, the lateral direction of the tunnel through the slide mechanism bottom respectively are bridged left and right pair of support brackets to the left and right pair of support brackets And a segment support beam supported so as to be movable by a predetermined amount along the line.
[0011]
Therefore, the excavator body is advanced by the propelling means while the cutter head is driven to rotate by the cutter head driving means, so that the front ground is excavated by the cutter head, and the segment assembly means carries the segment carried in from the outside. In addition to assembling to the inner wall surface of this tunnel , each support base travels along the rails arranged in the tunnel , and the segment support beam is moved through the support bracket by the lifting means at a predetermined position, so that the inside of the existing segment By pressing against the wall, the existing segment is held in a perfect circle. When the cutter head excavates a sharply curved tunnel, the segment support beam slides through the support bracket to each support base. mechanism by by moving along the lateral direction of the tunnel, of the existing segment became steeper curve Can be reliably pressed against the segment support beam to the surface, existing segments are held in a perfect circle state.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 is a front view of a segment perfect circle holding device according to an embodiment of the present invention, FIG. 2 is a side view of a segment perfect circle retention device of this embodiment, and FIG. An outline of a shield excavator is shown.
[0014]
As shown in FIG. 3, in the shield excavator of the present embodiment, a cutter head 12 is rotatably mounted on the front portion of a cylindrical skin plate 11 as the excavator body. A number of cutter bits 13 are fixed on the front surface. A ring gear 14 is fixed to the rear portion of the cutter head 12, and a hydraulic motor 15 is attached to the skin plate 11, and a drive gear 16 of the hydraulic motor 15 is engaged with the ring gear 14. Accordingly, when the hydraulic motor 15 is driven and the drive gear 16 is rotationally driven, the cutter head 12 can be rotated via the ring gear 14.
[0015]
A bulk head 17 is attached to the skin plate 11 behind the cutter head 12, and a chamber chamber 18 is formed between the cutter head 12 and the bulk head 17. The chamber chamber 18 is open at the other end of the mud pipe 19 and the exhaust pipe 20 with one end extending to the outside of the shield excavator. An agitator 21 for stirring and mixing earth and sand and muddy water is installed. A copy cutter 22 is provided on the outer peripheral portion of the cutter head 12, a manlock 23 is provided at the front end of the skin plate 11 to go out of the machine, and a chemical solution is injected into the outer peripheral portion of the skin plate 11. A tube 24 is provided.
[0016]
Further, a plurality of shield jacks 25 are arranged in the circumferential direction around the outer periphery of the rear portion of the skin plate 11, and the shield jacks 25 extend rearward in the advancing direction of the shield excavator on the inner peripheral surface of the tunnel excavated. By pressing against the established segment S, the skin plate 11, that is, the entire shield excavator can be advanced by the reaction force. On the other hand, a vertical beam 26 is formed at the center of the rear portion of the skin plate 11, and a frame 27 extends rearward from the vertical beam 26. Further, a segment erector 29 is supported by a ring gutter 28 at the rear part of the skin plate 11, and this segment erector 29 is a new segment in a space between the skin plate 11 advanced by the shield jack 25 and the existing segment S. A tunnel can be constructed with S. Further, a segment perfect circle holding device 30 is provided behind the shield jack 25.
[0017]
In the perfect circle holding device 30 of this segment, as shown in FIGS. 1 and 2, a pair of left and right rails 31 are attached to a gantry 27 fixed to the rear portion of the skin plate 11. A support base 33 is movably supported by each wheel 32 with a flange. An outer cylinder 34 is fixed on each support base 33, and an inner cylinder 35 is supported in the outer cylinder 34 so as to be axially movable. Further, a lifting jack 36 is attached to a side portion of each outer cylinder 34, and a tip end portion of a drive rod of the lifting jack 36 is connected to an upper portion of the inner cylinder 35. The inner cylinder 35 can move up and down with respect to 34.
[0018]
A support bracket 38 is connected to the upper end of each inner cylinder 36 by a connecting pin 37. On the other hand, the support beam 39 that is curved along the inner peripheral surface of the existing segment S is fixed with a pressure contact member 40 that presses against the inner peripheral surface of the existing segment S on the middle upper surface portion. Further, flange portions 39a are integrally formed at both ends of the support beam 39, and each flange portion 39a is supported by the slide mechanism 41 so as to be movable by a predetermined amount along the lateral direction of the tunnel. Yes. That is, a slide plate 42 and a guide plate 43 made of a polymer resin are stretched on the support bracket 38, and a pair of front and rear stoppers 44 are fixed, while a flange portion 39a of the support beam 39 is connected to the slide plate 42. And is held by a stopper 44. Accordingly, the support beam 39 is restrained so as not to move in the front-rear direction (longitudinal direction of the tunnel ) with respect to the support bracket 38, but is restrained so as to be movable by a predetermined amount in the left-right direction ( tunnel radial direction).
[0019]
Therefore, in order to form a tunnel by excavation, as shown in FIG. 3, first, while the cutter head 12 is rotated by the hydraulic motor 15, a plurality of shield jacks 25 are extended, and the pressing reaction force against the existing segment S is used. By moving the skin plate 11 forward, a large number of cutter bits 13 of the cutter head 12 excavate the front ground. Then, the earth and sand excavated by the cutter bit 13 is taken into the chamber chamber 18, supplied with water from the mud pipe 19, and the agitator 21 agitates and mixes the excavated earth and water and is discharged outside through the mud pipe 20. The Next, any one of the shield jacks 25 is operated in the contracting direction to form a space with the existing segment S, and a new segment S is mounted in this space by the segment erector 29.
[0020]
Thereafter, in the perfect circle holding device 30, as shown in FIGS. 1 and 2, as the skin plate 11 moves forward, the wheel 32 rolls on the rail 31 to advance the support base 33, and a predetermined stop position. The elevating jack 36 is extended to raise the inner cylinder 35 and the support bracket 38 relative to the outer cylinder 34. Then, the support beam 39 supported by the support bracket 38 via the slide mechanism 41 is raised, and the pressure contact member 40 is pressed against the inner peripheral surface of the existing segment S, so that the existing segment S is held in a perfect circle state. Will be.
[0021]
When the tunnel excavated by the cutter head 12 has a sharp curve shape, the positions of the existing segment S and the support beam 39 (pressure contact member 40) supported by the support base 33 running on the rail 31 are shifted in the left-right direction. End up. In this case, in the present embodiment, the support beam 39 is moved in the left-right direction with respect to the support base 33 by the slide mechanism 41, whereby the existing segment S and the support beam 39 (pressure contact member 40) in the left-right direction. The position can be adjusted, and the existing segment S can be held in a perfect circle by reliably pressing the pressure contact member 40 of the support beam 39 on the inner peripheral surface of the existing segment S having a sharp curve.
[0022]
【The invention's effect】
As described above in detail in the embodiment, according to the segment perfect circle holding device of the present invention, the pair of left and right support bases are movably supported on the pair of left and right rails disposed in the tunnel . the support bracket vertically movably supported by the lifting means to the support, since the support freely predetermined amount of movement of the segment support beams along the transverse direction of the tunnel through the slide mechanism to the support bracket, the steep curve shape of the tunnel The position of the existing segment assembled on the inner wall surface and the pressure contact member of the support beam can be easily matched, and the existing segment can be held in a perfect circle by securely pressing the pressure contact member 40 to the inner peripheral surface of the segment S. can do.
[0023]
Further, according to the tunnel excavator of the present invention, a rotatable cutter head is attached to the front portion of the cylindrical excavator body so that the cutter excavator body can be driven and rotated by the cutter head driving means, and the excavator main body is propelled. The support bracket can be moved on the rail in the tunnel movably, and the support bracket can be lifted and lowered by the lifting means, and the segment support beam is placed in the lateral direction of the tunnel via a slide mechanism on the support bracket. Since a predetermined amount is supported along the inner wall surface of the sharply curved tunnel , the position of the existing segment assembled on the inner wall surface of the sharply curved tunnel and the pressure contact member of the support beam can be easily adapted to press contact with the inner peripheral surface of the segment S. the existing segment by reliably pressing the member 40 can be held in a perfect circle state, can be shortened and reduction of construction cost of the construction period of the tunnel construction .
[Brief description of the drawings]
FIG. 1 is a front view of a perfect circle holding device for a segment according to an embodiment of the present invention.
FIG. 2 is a side view of the segment perfect circle holding device of the present embodiment.
FIG. 3 is a schematic view of a shield excavator equipped with a segment perfect circle holding device;
FIG. 4 is a schematic view of a conventional segment perfect circle holding device.
[Explanation of symbols]
11 Skin plate (excavator body)
12 Cutter head 15 Cutter turning motor (Cutter head drive means)
25 Shield jack (propulsion means)
27 frame 29 segment erector (segment assembly means)
30 perfect circle holding device 31 rail 32 wheel 33 support base 34 outer cylinder 35 inner cylinder 36 lift jack (lifting means)
38 Support bracket 39 Support beam 40 Pressure contact member 41 Slide mechanism

Claims (2)

  In a perfect circle holding device for a segment that press-contacts a large number of segments assembled on the inner wall surface of the tunnel and holds them in a perfect circle state, a pair of left and right rails arranged along the longitudinal direction in the tunnel, A pair of left and right support bases movably supported along the pair of left and right rails, a pair of left and right lifting means mounted on the pair of left and right support bases, and a pair of left and right lifting means, respectively. A pair of left and right support brackets supported by the left and right support brackets, and a lower portion is supported by the pair of left and right support brackets by a predetermined amount along the lateral direction of the tunnel via a slide mechanism. A segment perfect circle holding device, comprising: Excavator body having a cylindrical shape, a cutter head rotatably mounted on the front portion of the excavator body, cutter head driving means for driving and rotating the cutter head, and propulsion means provided in the excavator body And a segment assembling means for assembling the segment mounted on the rear portion of the excavator body and carried into the tunnel to the inner wall surface of the tunnel, and a plurality of segments assembled on the inner wall surface of the tunnel In a tunnel excavator provided with a perfect circle holding device for a segment to be held in a perfect circle state, the perfect circle holding device includes a pair of left and right rails arranged along the longitudinal direction of the tunnel, and the pair of left and right rails. a pair of right and left support platform which is movably supported along each of a pair of left and right elevating means mounted respectively on the left and right pair of supports, thereby left and right pair of the lifting means A pair of left and right support brackets supported so as to be able to move up and down, and a pair of left and right support brackets, and a lower part is movable to the pair of left and right support brackets by a predetermined amount along the lateral direction of the tunnel via a slide mechanism. A tunnel excavator characterized in that it comprises a segment support beam supported by the frame.

Images