JP3752099B2 - Tunnel excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tunnel excavator such as a shield excavator and a tunnel boring machine, and more particularly to an apparatus for assembling a lining member such as a segment on an inner wall surface of an existing tunnel.
[0002]
[Prior art]
FIG. 4 shows an outline of a shield excavator equipped with a conventional shape holding device.
[0003]
In a general shield excavator, as shown in FIG. 4, a cutter head 12 is rotatably mounted on the front portion of the excavator body 11, and a number of cutter bits 13 are provided on the front surface of the cutter head 12. It is fixed. A ring gear 14 is fixed to the rear portion of the cutter head 12, and a drive motor 15 is attached to the excavator body 11, and a drive gear 16 of the drive motor 15 is engaged with the ring gear 14. Therefore, when the drive motor 15 is driven and the drive gear 16 is rotationally driven, the cutter head 12 can be rotated via the ring gear 14.
[0004]
A bulkhead 17 is attached to the excavator body 11 at a position behind the cutter head 12, and a chamber 18 is formed between the cutter head 12 and the bulkhead 17. The 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 the muddy water is installed. A copy cutter 22 is provided on the outer periphery of the cutter head 12, a manlock 23 is provided at the front end of the excavator main body 11 to go out of the machine, and an outer periphery of the excavator main body 11 is provided on the outer periphery. A chemical solution injection tube 24 is provided.
[0005]
Further, a plurality of shield jacks 25 are arranged in the circumferential direction around the rear outer periphery of the excavator main body 11, and the inner peripheral surface of the tunnel that the shield jacks 25 are excavated by extending rearward in the digging direction of the shield excavator. By pushing against the existing segment S constructed in the above, the excavator body 11, that is, the entire shield excavator can be advanced by the reaction force. Further, a ring girder 26 is formed at the rear part of the excavator body 11, and a gantry 28 is fixed so as to extend rearward to a vertical beam 27 attached to the ring girder 26. An erector device 29 is supported via the ring girder 26, and the erector device 29 is fitted with a new segment S in a space between the excavator body 11 advanced by the shield jack 25 and the existing segment S. And you can build a tunnel. Further, a conventional shape holding device 101 that holds the segment S in a predetermined shape (for example, a perfect circle) is provided at the rear portion of the gantry 28.
[0006]
In this conventional shape holding device 101, a pair of left and right horizontal rails 102 are attached on the gantry 28. On the other hand, the pair of left and right support cylinders 103 are configured such that an upper outer cylinder 104 and a lower outer cylinder 105 are fitted so as to be relatively movable, and an expansion jack 106 is interposed therebetween. Each support cylinder 103 is provided with a support roller 107 so that it can roll on the horizontal rail 102. An upper support beam 108 having an arc shape that can be pressed against the inner surface of the segment S is connected to the upper part of the left and right outer cylinders 104, while a lower support beam 109 is connected to the lower part of the left and right inner cylinders 105. Pressure contact members 110 and 111 are attached to the outer peripheral surfaces of the support beams 108 and 109, respectively. A moving jack 112 is attached to the gantry 28, and a drive rod 113 of the moving jack 112 is connected to the support cylinder 103.
[0007]
Accordingly, when the shield jack 25 is extended while the cutter head 12 is rotated, the excavator body 11 moves forward by the pressing reaction force against the segment S, and the ground is excavated by the cutter head 12 to form a tunnel. Thereafter, the segment S is assembled in a ring shape on the inner wall surface of the existing tunnel by the erector device 29, and the shape holding device 101 holds the segment S assembled in the ring shape in a predetermined shape (for example, a perfect circle).
[0008]
In other words, by extending the moving jack 112 and moving the support cylinder 103 forward, it moves to a position facing the inner peripheral surface of the segment S holding the press contact members 110 and 111, as shown by a two-dot chain line in FIG. To do. At this position, the telescopic jack 106 is extended, the inner cylinder 105 is lowered, the outer cylinder 104 is raised, and the pressure contact members 110 and 111 are inserted into the ring-shaped segment S via the support beams 108 and 109, respectively. It is pressed against the peripheral surface and held in a predetermined shape. During this operation, the excavator main body 11 moves forward. At this time, by releasing the hydraulic holding force of the moving jack 110, the shape holding device 101 is pressed against the segment S and holds the shape.
[0009]
[Problems to be solved by the invention]
In the assembling operation of the segment S by the erector device 29 and the shape holding device 101, it is easy to assemble the segment S at the lower part of the existing tunnel, but assembling the segment S at the upper part of the existing tunnel Since it is heavy, it is a difficult task. Therefore, it is conceivable that a revolving assembly scaffold that is movable along the circumferential direction of the existing tunnel is provided behind the erector device 29, and an operator rides on this revolving assembly scaffold to assist in assembling the segment S. ing.
[0010]
However, if the swivel type assembly scaffold is provided behind the erector device 29, the swivel type assembly scaffold interferes with the shape holding device 101. Therefore, the shape holding device 101 must be provided at a further rear position. Then, the shape holding device 101 is located at a certain distance from the erector device 29, and there is a problem that the link-shaped segment S assembled by the erector device 29 cannot be held immediately.
[0011]
The present invention solves such a problem, and provides a tunnel excavator that improves the work efficiency of the segment assembly work by appropriately holding the lining member assembled to the wall surface of the existing tunnel. The purpose is to do.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the tunnel excavator of the invention of claim 1 is provided with a tubular excavator body, a propulsion jack for advancing the excavator body, and a front portion of the excavator body rotatably mounted. A cutter head, a cutter head driving means for driving and rotating the cutter head, an erector device that is mounted on a rear portion of the excavator body and assembles a cover member in a ring shape on a wall surface of an existing tunnel, and the excavator body A pedestal extending rearward from the rear, a workbench supported by a swivel frame attached to the cradle so as to be pivotable along the circumferential direction of the existing tunnel, and the workbench without interfering with the workbench Formed by excavation of the cutter head, and a shape holding device that is movably disposed before and after the workbench and is held in contact with the inner peripheral surface of the lining member that is assembled on the wall surface of the existing tunnel and held in a predetermined shape It is characterized in that the excavated earth and sand equipped and earth unloading means for discharging to the outside the.
[0013]
In the tunnel excavator according to the first aspect of the present invention, the shape holding device includes a pair of support cylinders that are vertically supported on both sides of the gantry, and upper and lower ends of the pair of support cylinders. And a pair of press contact members capable of connecting the comrades and press-contacting the inner peripheral surface of the lining member, wherein the work table is pivotable inside the support tube and the press contact member. .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
[0018]
FIG. 1 shows a side view of a shape holding device equipped in a tunnel excavator according to an embodiment of the present invention, and FIG. 2 shows a front view of the shape holding device.
[0019]
Since the tunnel excavator equipped with the shape holding device of the present embodiment is the same as the shield excavator described with reference to FIG. 4 described above, members having the same functions as those already described have the same reference numerals. A duplicate description will be omitted.
[0020]
In the tunnel excavator of this embodiment, as shown in FIGS. 1 and 2, a ring girder 26 is formed at the rear part of the excavator main body 11, and extends backward to a vertical beam 27 attached to the ring girder 26. As shown in FIG. The ring girder 26 supports an erector device 29 for assembling the segment S as a lining member. In addition, a swivel type assembly scaffold device 30 and a shape holding device 50 for holding the segment S in a predetermined shape (for example, a perfect circle) are provided at the rear portion of the gantry 28.
[0021]
In this swivel type assembly scaffold device 30, a crest-shaped swivel frame 31 that is positioned behind the erector device 29 is attached to the gantry 28, and a support beam 32 is fixed for reinforcement. A work table 34 is movably supported on the revolving frame 31 via a drive mechanism 33. The drive mechanism 33 moves the work table 34 along the swivel frame 31. The drive mechanism 33 is configured by a pinion meshing with a swirl rack provided along the swivel frame 31. The work table 34 moves the swivel frame 31. The horizontal state is maintained regardless of the position. Reference numeral 35 denotes a cable guide attached to the revolving frame 31, and supports a hydraulic hose and an electric cable connected to the work table 34 from a driving source (not shown).
[0022]
In this work table 34, a movable table 38 is supported by a swivel table 36 connected to the drive mechanism 33 by a horizontal jack 37 so as to be movable in the longitudinal direction of the existing tunnel. The cage 40 is supported so as to be movable up and down. The cage 40 has a box shape with an opening at the top, and can be used by an operator.
[0023]
In the shape holding device 50, a pair of left and right horizontal rails 51 are attached on the gantry 28. On the other hand, the pair of left and right support cylinders 52 are configured such that an outer cylinder 53 arranged at the upper part and an outer cylinder 54 arranged at the lower part are fitted so as to be relatively movable, and an extension jack 55 is interposed therebetween. Yes. Each support cylinder 52 is provided with a support roller 56 so that it can roll on the horizontal rail 51. Two upper support beams 58 and 59 having an arc shape that can be press-contacted to the inner surface of the segment S are connected to the upper part of the left and right outer cylinders 53 via the connection member 57, while The lower support beams 60 are connected to each other, and pressure contact members 61, 62, and 63 are attached to the outer peripheral surfaces of the support beams 58, 59, and 60, respectively. The distance between the pressure contact members 61 and 62 is substantially the same as the width of the segment S. A moving jack 64 is attached to the gantry 28, and a drive rod 65 of the moving jack 64 is connected to the support cylinder 52.
[0024]
In the revolving assembly scaffold device 30 and the shape holding device 50 configured as described above, when the shape holding device 50 moves, the revolving assembly scaffold device 30 (the revolving frame 31 and the work table 34) is not interfered. The shape holding device 50 can be moved back and forth. That is, the shape holding device 50 has a ring shape by the support cylinder 52 and the support beams 58, 59, 60 when viewed from the front (FIG. 2), and the turning frame 31 has a smaller diameter. Therefore, the support beams 58, 59, 60 of the shape holding device 50 can pass through the upper part and the lower part of the revolving frame 31 and the work table 34, and they do not interfere with each other. Further, the pressure contact members 61 and 62 (support beams 58 and 59) of the shape holding device 50 can be held in pressure contact with the segments S for two rings.
[0025]
To construct the tunnel excavation work by the tunnel excavator described above, as shown in FIG. 4, the shield jack 25 is extended while the cutter head 12 is rotated, and the excavator main body 11 is advanced by the pressing reaction force against the segment S. By doing so, the cutter head 12 excavates the ground in front and forms a tunnel. Thereafter, the segment S is assembled in a ring shape on the inner wall surface of the existing tunnel by the erector device 29, and the operator assists the assembly of the segment S using the swivel type assembly scaffold device 30. The segment S assembled to is held in a perfect circle.
[0026]
That is, the erector apparatus 29 holds the segment S conveyed in the existing tunnel and assembles it at a predetermined position in order from the lower side. An operator rides on the cage 40 (working table 34) of the swivel type assembly scaffold device 30, and performs assembly assistance of the segments S, that is, bolt fastening work for connecting and fixing adjacent segments S together. In this case, the operator can move the cage 40 along the revolving frame 31 with the drive mechanism 33, move the cage 40 back and forth with the horizontal jack 37, and raise and lower the cage 40 with the lifting jack 39. Bolt fastening work can be performed at the position.
[0027]
Then, in the shape holding device 50, the movable jack 64 is extended to advance the support cylinder 52 , so that the pressing members 61, 62, 63 of the segments S that hold the pressing members 61, 62, 63 are held as shown by two-dot chain lines in FIG. Move to a position facing the inner surface. At this time, support beams 58, 59 and 60 of the shape-retaining device 50 to escape through the outer swivel assembly scaffold 30 (rotating frame 31 and the work table 34), never both interfere.
[0028]
At this position, the telescopic jack 55 is extended, the outer cylinder 54 is lowered, the outer cylinder 53 is raised, and the pressure contact members 61, 62, 63 are connected to the ring-shaped segments via the support beams 58, 59, 60. The inner surface of S is pressed against and held in a predetermined shape. At this time, on the upper side of the shape holding device 50, the two pressing members 61 and 62 can press and hold the segments S for the second and third two rings simultaneously. The excavator main body 11 moves forward during this operation, but the shape holding device 50 is released by releasing the hydraulic holding force of the movable jack 64 in the holding state where the pressing members 61, 62, 63 are pressed against the segment S. The excavator body 11 (the gantry 28) can move forward while maintaining the segment S shape and remaining in its position.
[0029]
As described above, in the tunnel excavator according to the present embodiment, the revolving frame 31 and the work table 34 are provided inside the shape holding device 50 that forms a ring shape by the support cylinder 52 and the support beams 58, 59, 60, and the like. A pivoting assembly scaffold device 30 is located. Therefore, the shape holding device 50 passes through the outside of the revolving assembly scaffold device 30 and moves back and forth, and the revolving assembly scaffold device 30 and the shape holding device 50 do not interfere during the segment assembling operation. As a result, the segment S can be assembled efficiently and the shape can be reliably maintained.
[0030]
In the above-described embodiment, the cage 40 can be moved back and forth and raised and lowered by the jacks 37 and 39 on the work table 34, but the present invention is not limited to this configuration. FIG. 3 shows a side view of an example of the shape holding device installed in the tunnel excavator.
[0031]
In the present tunnel excavator, as shown in FIG. 3, an erector device 29 is disposed at the rear portion of the excavator body 11, and a swing type assembly scaffold device 70 and a shape holding device 50 are provided on the gantry 28. . Since the configuration of the excavator main body 11, the erector device 29, and the shape holding device 50 are the same as those in the above-described embodiment, members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals. Thus, duplicate description is omitted.
[0032]
In the revolving assembly scaffold device 70, a work table 71 is movably supported on the revolving frame 31 via a drive mechanism 33. In this work table 71, a movable table 74 is supported by a swivel table 72 connected to the drive mechanism 33 by a horizontal jack 73 so as to be movable in the longitudinal direction of the existing tunnel. The cage 76 is supported so as to be movable up and down. In addition, this link type raising / lowering mechanism 75 raises / lowers the X-type link by a hydraulic jack or a drive motor.
[0033]
Therefore, according to the swivel type assembly scaffold device 70, the cage 76 of the work table 71 can be moved up and down by the link type lifting mechanism 75, so that a stable operation can be performed as compared with the hydraulic jack alone.
[0034]
【The invention's effect】
As described above in detail in the embodiment, according to the shape holding device of the invention of claim 1, the cutter head that can be driven and rotated is attached to the front part of the tubular excavator body, and the rear part of the excavator body An erector device that attaches the lining member to the wall surface of the existing tunnel in a ring shape is mounted, and is supported by a pedestal extending rearward from the rear part of the excavator body so as to be rotatable along the circumferential direction of the existing tunnel. A work table, and a shape holding device that is arranged so as to be movable back and forth without interfering with the work table and is held in a predetermined shape by being pressed against the inner peripheral surface of the lining member assembled to the wall surface of the existing tunnel. Because it is arranged, the shape holding device can move back and forth regardless of the position of the workbench, and the shape of the lining member can be reliably held, resulting in improved work efficiency of the lining member assembly work. Can be achieved.
[0035]
According to the shape holding device of the first aspect of the present invention, the shape holding device includes a pair of support cylinders that are vertically supported on both sides of the gantry and upper and lower ends of the pair of support cylinders. Since the work table is pivotable inside the support cylinder and the pressure contact member, the shape holding device is located on the outer side of the work table. The shape holding device and the work table can be simplified.
[0036]
In addition, according to the shape holding device , the shape holding device is covered by connecting a pair of support cylinders that are vertically supported on both sides of the gantry and upper ends and lower ends of the pair of support cylinders. The inner peripheral surface of the work member is composed of a pair of press contact members that can be press-contacted, and the upper press contact member can press the inner peripheral surface of the lining member for at least the ring arranged in parallel along the longitudinal direction of the existing tunnel. Therefore, the pressure contact member can press and hold the lining members for two rings at the same time, and the work efficiency of the lining member assembling work can be improved.
[0037]
Further , according to the present shape holding device, the work table is configured such that the cage on which the worker rides is supported by the swivel table supported by the swivel frame so as to be movable along the front-rear direction of the existing tunnel. The work table can be moved to a position desired by the worker to perform work.
[0038]
Further , according to the present shape holding device, the work table is configured such that the cage on which the worker rides is supported by the swivel table supported by the swivel frame so as to be movable along the radial direction of the existing tunnel. It is possible to work at a position desired by the operator on the work table.
[Brief description of the drawings]
FIG. 1 is a side view of a shape holding device provided in a tunnel excavator according to an embodiment of the present invention.
FIG. 2 is a front view of the shape holding device.
FIG. 3 is a side view of an example of a shape holding device installed in a tunnel excavator.
FIG. 4 is a schematic view of a shield excavator equipped with a conventional shape holding device.
[Explanation of symbols]
11 Excavator body 12 Cutter head 15 Drive motor (cutter head drive means)
25 Shield Jack (Propulsion Jack)
28 Stand 29 Elector Device 30 Swing Type Scaffolding Device 31 Swing Frame 33 Drive Mechanism 34 Work Platform 37 Horizontal Jack 39 Elevating Jack 40 Cage 50 Shape Holding Device 52 Supporting Cylinder 55 Telescopic Jack 58, 59, 60 Support Beams 61, 62, 63 Pressure contact member 64 Moving jack 70 Rotating assembly scaffold device 71 Work table 73 Horizontal jack 75 Link type lifting mechanism 76 Cage S segment (lining member)

Claims (1)

A tubular excavator body, a propulsion jack that advances the excavator body, a cutter head that is rotatably mounted on a front portion of the excavator body, and a cutter head driving means that drives and rotates the cutter head; An erector device that is attached to the rear part of the excavator body and assembles the lining member in a ring shape on the wall surface of the existing tunnel, a pedestal extending rearward from the rear part of the excavator body, and a swivel attached to the cradle A work table supported by the frame so as to be pivotable along the circumferential direction of the existing tunnel, and mounted on the frame so as to be movable before and after the work table without interfering with the work table and assembled to the wall surface of the existing tunnel A shape holding device that press-contacts the inner peripheral surface of the lining member and holds it in a predetermined shape, and a soil discharging means that discharges excavated sediment generated by excavation of the cutter head to the outside,
The shape holding device connects a pair of support cylinders supported on both sides of the gantry so as to be vertically extendable, and upper and lower ends of the pair of support cylinders to connect the inner peripheral surface of the lining member. A tunnel excavator, wherein the work table is pivotable inside the support cylinder and the pressure contact member.

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