JPH0743486U - Roof shield device - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it easy to assemble segments even in a space with a small vertical gap in a roof shield or the like. [Structure] Traveling rails 4, 5 laid on each of the two bottom tunnels 2, 3 excavated at the required intervals on the left and right
And a frame main body 11 installed so as to be capable of traveling across both the traveling rails 4 and 5, and a traverse rail 2 arranged on the front side of the frame main body 11 so as to straddle the traveling rails 4 and 5.
A roof shield device (10) comprising: an excavation device (2) for excavating a front part of a tunnel while traversing along the traverse rail (22). The assembly device rail 18, the traverse table 28 that can be traversed along the assembly device rail 18, the elevating table 34 that is supported by the traverse table 28 so that its vertical position can be adjusted, A segment gripping device 39, which is attached to a base 34 via a parallel link mechanism 40 so as to be vertically movable, and has a segment clamp tool 36 on an upper surface, and a rotary drive device 44 for vertically rotating the parallel link mechanism 40. Segment assembly device 20
Equipped with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roof shield device.

[0002]

[Prior art]

 Conventionally, as a construction method for constructing a tunnel having a large width (a flat shape), a construction method as shown in FIGS. 8 to 11 has been used. That is, first, as shown in FIG. 8, two bottom guide tunnels a and b extending in parallel with a required space left and right are excavated by a known means, and then both bottom guide tunnels a and b are excavated. As shown in FIG. 9, a substantially L-shaped concrete wall c which will later become a side wall of the tunnel and a part of the roadbed is formed at each of the outer and lower corners by driving.

Next, a range f surrounded by a line that linearly connects the bottom surfaces of both concrete walls c and c and a line that connects the outer surfaces of both concrete walls c and c above each other in a semicircle shape. The whole earth and sand is dug by hand or excavated by an excavating machine such as a backhoe, and as shown in FIG. 10, a semi-circular shield excavator A moves in the excavating direction across the upper sides of both concrete walls c, c. It is installed freely. While the shield excavator A is advanced according to the excavation of the tunnel, well-known means are provided behind the shield excavator A and between the horizontal portions below the concrete walls c and c and the upper semicircular portions. The concrete is cast by the method to construct a tunnel E having a large width as shown in FIG.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional tunnel construction method, the excavation cross-section area is set in order to simultaneously excavate a range that connects the upper and lower directions of both left and right concrete walls, that is, a wide range of soil corresponding to almost the entire cross section of the tunnel. There is a danger that the earth and sand of the face will collapse and collapse, which poses a problem in terms of work safety, and in order to excavate a wide range of earth and sand at the same time, the shield excavator must be large in size. The production cost was high and the construction cost was high.

Therefore, the earth and sand at the lower part of the roof that connects both bottom tunnels are partially excavated like the upper part and the lower part, and after the upper part is excavated, the segments are automatically assembled at the rear part. It is possible to implement the roof shield by the roof shield device, but when the partial excavation is performed, the lower part of the roof is narrow and it is not possible to secure a sufficient working space. There is a problem that the segment assembly device cannot be applied.

The present invention has been devised in order to solve the above-mentioned conventional problems, and it is possible to construct a roof tunnel safely and at a reasonable price, and to assemble a segment even in a space in which the vertical interval of the roof shield is narrow. It is an object of the present invention to provide a roof shield device including a segment assembly device that can be easily performed.

[0007]

[Means for Solving the Problems]

 The present invention comprises a traveling rail laid on each of two bottom guide shafts excavated at right and left sides, and a frame body installed so as to be capable of traveling across both traveling rails. A roof shield device comprising: a traverse rail disposed on the front side of the frame main body so as to straddle the traveling rail; and an excavating device that traverses along the traverse rail and partially excavates a front surface of a tunnel. At the rear of the frame body, an assembly device rail installed so as to straddle the traveling rail, a traverse table that can be traversed along the assembly device rail, and a vertically movable position are supported by the traverse table. A lift table, a segment gripping device that is attached to the lift table so as to be vertically movable via a parallel link mechanism, and has a segment clamp tool on the upper surface, and the parallel link mechanism is rotated up and down. That those of the roof shield apparatus, which comprising the segment assembly device comprising a rotary drive device.

[0008]

[Action]

 In the present invention, after excavating the earth and sand on the front surface by the cutter of the excavator in the roof shield device, the excavator is traversed to a predetermined position along the traverse rail, and the earth and sand on the front surface are excavated again. By repeating this excavation, the entire width of the traverse rail, that is, the sediment in front of the bottom tunnel is excavated in a ring shape.

During this excavation process, the segment assembly device assembles the segment on the outer peripheral surface of the ring-shaped excavation portion behind the roof shield device. That is, upon receiving the segment from the segment transport device by the segment assembling device, first the elevator is lowered and the parallel link mechanism is rotated downward to bring the segment gripping device to the lowest position. The segment carrier is moved along the ceiling rail so that the segment hung on the segment carrier is located directly above the segment gripping device, and then the segment carrier is lowered to lower the segment gripping device. To grab the segment and then retract the segment carrier. Next, the parallel link mechanism is rotated upward to adjust the front-back position of the segment, and then the lifting platform is raised to position the segment in front of the existing segment for assembly. The segment gripping device is lowered, and the same operation as described above is performed again to assemble the next segment.

[0010]

【Example】

 An embodiment of a roof shield device according to the present invention will be described below with reference to the drawings. 4 to 7 show an example of a roof shield device to which the present invention is applied. As shown in FIG. 7, a vertical shaft 1 vertically excavated from the ground to the right and left as shown in FIG. Two bottom guide shafts 2 and 3 extending in parallel at intervals are excavated by hand or by mechanical means, and left and right traveling rails 4 and 5 are laid in each of the bottom guide shafts 2 and 3. However, the figure shows a roof shield device applied when excavating a roof tunnel by traveling along this traveling rail.

The bottom tunnels 2 and 3 are preliminarily excavated while being reinforced by commonly known known reinforcing means, and the excavated bottom tunnels 2 and 3 will later be part of a tunnel wall. The concrete wall surface 6 is formed by casting. Further, at the time of pouring concrete, the base of the fixing metal fitting 7 is embedded together, the rail base 8 is fixed to the fixing metal fitting 7, and the traveling rails 4 and 5 are laid on the rail base 8. ing. Further, a discharge conveyor 9 for discharging excavated earth and sand to the outside is attached to the rail base 8 so as to be freely movable.

The roof shield device 10 is placed on the traveling rails 4, 5 of the bottom guide shafts 2, 3. The roof shield device 10 has a frame main body 11 having a curved middle height extending over the upper portions of the bottom tunnels 2 and 3, and support legs 12 are provided at lower ends on both sides of the frame main body 11. A traveling table 13 mounted via the traveling rails 4 and 5 is mounted so as to travel on the traveling rails 4 and 5 via traveling wheels 14. A curved roof 15 extending between the upper portions of the bottom tunnels 2 and 3 is integrally fixed to the upper side of the frame body 11, and a movable hood provided with a hydraulic jack 16 on the front side of the roof 15. 17 is provided, and further on the rear side, a segment assembly device 20 that assembles a segment 19 at the rear portion of the roof 15 while traversing along a curved assembly device rail 18, and a reaction force is applied to the assembled existing segment 19a. A propulsion jack 21 for propelling the roof shield device 10 is provided.

A traverse rail 22 curved along the frame body 11 is attached to the roof shield device 10, and an excavator 23 is provided on the traverse rail 22. In the illustrated case, two excavation devices 23 are provided. As shown in FIGS. 4 to 7, the excavation device 23 includes a traverse table 24 that is traversed and driven along the traverse rail 22, and a moving rod 25 that is supported so as to be movable back and forth with respect to the traverse table 24. And a rotary cutter 26 attached to the front end of the moving rod 25 so as to be tiltable up and down so as to excavate the front surface of the soil by rotation. In the figure, 27 indicates a ring-shaped roof tunnel formed between the bottom tunnels 2 and 3.

FIGS. 1 to 3 show an embodiment of a segment assembly device 20 provided at the rear portion of the roof shield device. The segment assembly device 20 is assembled at the rear portion of the frame body 11 so as to straddle the traveling rails 4, 5. The apparatus rail 18 was installed, the traverse base 28 was provided on the assembly apparatus rail 18 so as to be traversable, and the gear 29 (rack) provided on the assembly apparatus rail 18 and the pinion 30 meshing with the gear 29 were provided. A traverse drive device 32 including a drive motor 31 drives the traverse table 28 in a traverse direction. An elevating table 34 is attached to the traverse table 28 via a vertical slide guide 33 so that the elevating table 34 can be moved up and down, and the elevating table 34 is moved up and down between the elevating table 34 and the traverse table 28 to move the upper and lower positions. An elevating drive device 35 including an elevating jack for adjustment is provided.

Further, behind the elevating table 34, there is disposed a segment gripping device 39 in which a sliding frame 37 having a segment clamp tool 36 on the upper surface is positionally adjustable back and forth along a sliding rod 38. The segment gripping device 39 and the elevating table 34 are connected to each other via a parallel link mechanism 40 which is capable of moving the segment gripping device 39 in a vertical direction and moving it in parallel. The parallel link mechanism 40 is arranged in parallel to the lower side position of the upper link 41, which connects the lifting platform 34 and the segment gripping device 39 so as to be vertically rotatable, and is also vertically arranged. A plurality of parallel link mechanisms 40 (two in the drawing) are provided in the width direction, each of which is composed of a lower link 42 that is rotatably connected and has the same length.

A bracket 43 protruding downward is provided between the longitudinal intermediate positions of the upper link 41, and the parallel position is provided between the lower position of the bracket 43 and the elevating table 34. A rotation drive device 44 is provided for vertically rotating the link mechanism 40 to move the segment gripping device 39 in parallel.

At the rear of the segment assembling device 20, traveling in the tunnel excavation direction along the ceiling rail 45 fixed to the lower surface of the existing segment 19a assembled by the segment assembling device 20, and at the suspension point 46. There is provided a segment carrier 47 for feeding the segment 19 hung via the above so as to lower it onto the segment gripping device 39 of the segment assembling device 20.

Next, a procedure for assembling the segment 19 will be described. When the segment assembling device 20 receives the segment 19 carried by the segment carrier 47, first, the elevating table 34 is lowered, and the parallel link mechanism 40 is rotated downward to move the segment gripping device 39 to the maximum position. Set to the lowered position (the position indicated by the phantom line in Fig. 1). The segment carrier truck 47 is caused to travel along the ceiling rail 45 so that the segment 19 suspended on the segment carrier truck 47 is located directly above the segment gripping device 39.

Next, the segment 19 is moved down by the segment carrier truck 47, placed on the segment gripping device 39, and clamped by the segment clamp 36. When the segment 19 is delivered to the segment gripping device 39, the segment carrier truck 47 is retracted along the ceiling rail 45.

Subsequently, the rotation drive device 44 is driven to rotate the parallel link mechanism 40 upward, and the front and rear positions are set so that the segment 19 supported by the segment gripping device 39 is located at the front side position of the existing segment 19a. After the adjustment, the lifting drive device 35 by the lifting jack is reduced to raise the lifting table 34, and the segment 19 is assembled to the existing segment 19a. The segment gripping device 39 is lowered and the same operation as described above is performed again to assemble the next segment 19.

[0021]

[Effect of device]

 According to the roof shield apparatus of the present invention, the roof tunnel between the two bottom tunnels is partially excavated by the roof shield apparatus to the minimum necessary extent, thereby reducing the excavated cross-sectional area as much as possible. In addition to being able to prevent landslides at the cutting face and excavating the roof tunnel safely, it is also possible to construct a tunnel with a shield excavator that is smaller than before, so the construction cost of the entire tunnel can be reduced. At the same time, the segment gripping device of the segment assembling device, which is installed transversely to the rear part of the roof shield device, performs a combination of vertical translation by the rotation of the parallel link mechanism and elevation by the elevating table. Since it has a compact structure, it can be assembled by receiving the segments and adjusting the front and rear positions, Even in a narrow space interval, an excellent effect capable of easily and efficiently automated assembly work industry.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a segment assembly device in a roof shield device according to the present invention.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is a view on arrow B in FIG.

FIG. 4 is a front view showing an example of a roof shield device viewed in a tunnel excavation direction, and is a front view seen from different positions in a left half and a right half in the figure.

5 is a view on arrow CC of FIG. 4. FIG.

FIG. 6 is a view taken in the direction of arrows D-D in FIG.

FIG. 7 is a side view showing an example of a roof shield construction method to which the present invention is applied.

FIG. 8 shows an example of a conventional shield construction method, and is a front view showing construction of two parallel bottom tunnels.

FIG. 9 is a front view showing a concrete wall formation state in the bottom guide shaft that is carried out after the work of FIG. 8;

FIG. 10 is a front view showing an installed state of a shield excavation device that is implemented after the work of FIG. 9;

FIG. 11 is a front view of a tunnel with a large width, which is constructed by the shield construction method performed after FIG.

[Explanation of symbols]

 2, 3 ... Bottom tunnel 4, 5 ... Traveling rail 10 ... Roof roof device 11 ... Frame body 15 ... Roof 18 ... Assembly device rail 19 ...・ ・ ・ Segment 20 ・ ・ ・ ・ Segment assembly device 22 ・ ・ ・ ・ ・ ・ Transverse rail 23 ・ ・ ・ ・ Excavation device 28 ・ ・ ・ ・ Transverse platform 34 ・ ・ ・ ・ ・ ・ Elevating platform 36 ・ ・ ・ ・ ・ ・ Segment clamp tool 39 ・・ ・ ・ Segment gripping device 40 ・ ・ ・ Parallel link mechanism 44 ・ ・ ・ ・ Rotation drive device

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Ken Watanabe 4-2-1 Shimohoya, Hoya-shi, Tokyo

Claims (1)

[Scope of utility model registration request] 1. Two excavated pieces are arranged at a required interval on the left and right.
Traveling rails laid on each of the bottom guide shafts of the book, a frame main body installed so as to be capable of traveling across both traveling rails, and a traverse rail arranged on the front side of the frame main body so as to straddle the traveling rails. A roof shield device including a digging device that partially digs a tunnel front while traversing along the traverse rail, for an assembling device installed across the traveling rail at the rear part of the frame body. Rails, a traverse table that can be traversed along the rails for the assembling device, an elevating table that is supported by the traversing table so that the vertical position can be adjusted, and the elevating table is vertically parallel via a parallel link mechanism. A segment assembly device comprising a segment gripping device movably attached and having a segment clamp tool on the upper surface, and a rotary drive device for vertically rotating the parallel link mechanism is provided. Roof shield apparatus according to claim and.