JPS6233837Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in segments constructed in tunnels excavated by shield tunneling machines.

Conventionally, after a tunnel is excavated by a shield excavator, workers construct the tunnel wall by assembling each segment manually or semi-mechanically using an erector device in the tail plate behind the shield body. .

This assembly work is carried out by assembling segments 2, each with grout holes 1 as shown in Figure 1, into a circular shape within a tailstock 3 as shown in Figure 2, having workers fasten the segments 2 together by inserting bolts 5 into their connecting holes 4, and then injecting backfilling agent 6 around the entire circumference through each grout hole 1.

However, the assembly of segments is carried out in a tunnel with a poor work environment where dust and other particles are scattered, and the work involves driving the erector device, attaching the segments to the erector, positioning and supporting the heavy segments, and also connecting them to each other. The drawback is that it requires heavy labor, and many workers must work together to perform the work.

The present invention was made to solve the above problems, and is a new device used in automatic segment assembly equipment that can eliminate heavy labor under adverse working environments and can automatically assemble segments. The purpose is to provide segments.

The feature is that the tunnel wall construction segment has an uneven fastening means on the front and rear end surfaces of the arcuate segment and a discontinuous groove carved in the circumferential direction on the inner surface of the segment.

Hereinafter, the present invention will be described in detail based on examples thereof.

FIG. 3 shows an embodiment of the tunnel wall construction segment 10 of the present invention.

This segment 10 is usually formed in an arc shape, and protrusions 12 and recesses 13, which are fastening means 11 formed along the arc, are formed on the front and rear end faces 10a and 10b, and on the left and right end faces 10c and 10d. A protrusion 15 and a recess 16, which are fastening means 14, are provided.

The inner surface 10A of the segment 10 has a discontinuous groove 17 over the entire circumferential length, into which a gear can mesh, and a positioning hole 18 on each side of the groove.
is engraved on it.

Furthermore, this discontinuous groove 17 and the positioning hole 1
Grout holes 19 are bored through the outer surface 10B at a distance of 8 from each other.

Since the segments 10 formed as described above are made of, for example, brick ceramics or iron, the sealing tape 20 for obtaining watertightness between the constructed segments 10 is applied to the front and rear end faces 10a, 10b, and the left and right end faces. It is attached so as to surround 10c and 10d.

Furthermore, depending on the construction position of the segment 10,
As shown in FIG. 4a and b, the left and right end surfaces 10c and 1
The protrusion 1 of the fastening means 14 on one or both of 0d
5. Place the recess 16 and the positioning hole 1 on the inner surface 10A.
Segments 10 without 8 are also used.

Since the segment 10 of the present invention is constructed as described above, it is assembled as follows. First, the automatic segment assembly device 21 of the shield excavator that automatically assembles the segments 10 described above will be briefly described based on FIG.
An automatic segment assembly device 21 is installed inside the tail plate 3 behind an appropriate number of shield jacks 22 attached to the vehicle and inside the already assembled segments 10M.

This assembly device 21 mainly consists of segment 1
0 is held and carried into the segment assembly position 23 in the tail plate 3, and the segment 1 is added.
0 in the circumferential direction of the tail plate 3; and an appropriate number of segments installed on the inner circumference of the tail plate 3 to sequentially transfer the segments 10 in the circumferential direction within the tail plate 3. It is composed of a feeding body 25, a positioning body 26 for the top segment 10N provided near the ceiling of the tail plate 3, and a guide body 27 for guiding the segment 10 being transferred as shown in FIG.

According to such an automatic segment assembly device 21, the segments 10 are transported to a predetermined position by a cart 29 running on a track 28 in the tunnel wall 7.
Above, the segment transport body 24, which moves along a track 30 installed on the rear ceiling of the shield body 21b, is moved by wheels 33 by a drive motor 32 mounted on a frame 31a of a transport means 31 shown in FIG. drive and move.

Next, the holding means 36 and the transfer means 37 are lowered onto the segment 10 by the cylinder 35 of the elevating means 34, and the detection rod 39 suspended from the gear box 38 is brought into contact with the inner surface 10A of the segment 10. Therefore, in order to suspend the segment 10 through the grout hole 19, the cylinder 40 of the holding means 36 is
While gradually extending the vertical shaft 42 via the gears of the gear box 38 with the drive motor 41,
Rotate in the direction. Since the grout hole 19 has a female thread, the screw 42a at the lower end of the vertical shaft 42 is screwed into the grout hole 19, and the segment 10 is suspended by the holding means 36.

At the same time as this suspension operation, the gear 44 of the transfer means 37
is gradually lowered by the cylinder 45, and the gear 44 meshes with the discontinuous groove 17 carved in the inner surface 10A of the segment 10.

In the above state, the segment 10 is moved to the elevating means 34
The segment is lifted up by the cylinder 35 and carried by the carrying means 31 to the segment assembly position 23 shown in FIG. When the segment 10 is placed in the lower part 3a of the tail plate 3 shown in FIG. after that,
When the gear 44 of the transfer means 37 is rotated by the drive motor 46, the segments 10 are moved in an arrow direction through the discontinuous groove 17 while being mounted on each roller 47 of the guide body 27 attached to the inner surface of the tail plate 3. mark 4
8a or 48b direction.

Since several segment conveyors 25 are installed in the circumferential direction inside the tail plate 3,
The segment 10 transferred from the segment carry-in transport body 24 is delivered to the adjacent segment delivery body 25. After this,
The carriage 29 moves in the reverse order to bring in a new segment 10.

The segment 10 delivered to the segment feeding body 25 is fed in the direction of arrow 52 by a gear 51 which engages with the discontinuous groove 17 and is rotated by the drive motor 50 of the feeding means 49, as shown in FIG. At this time, the segment 10 includes a pair of rollers 55, 55 of a guide means 54 pivotally supported in a frame 53 supporting the gear 51, side rollers 56, 56 guiding the front end surface 10a, and the guide body 27.
is guided by rollers 47 to prevent meandering during transportation.

The segments 10 that have been transported in the circumferential direction through several segment conveyors 25 are transferred to other segments 10M that have already been assembled as shown in FIG.
When it comes into contact with the ridges 15 and recesses 16 of the fastening means 14 provided on the mutual side end surfaces 10c and 10d,
are fitted, and the segment 10 is automatically positioned. At this time, the drive motor 50 of the adjacent segment transport body 25 is stopped by a signal that detects the stoppage of the segment 10, and the segment 10 is held in its position by the stopped gear 51.

In this way, the segment 10 is automatically connected to the other segment 10M in the circumferential direction, but there is a slight gap 57 between the segment 10 and the rear segment 10P, which has already been assembled in an annular shape for transportation of the segment 10. (See Figure 5) remains. Therefore,
When the shield jack 22 pushes the segments 10 in the direction of arrow 58, the protrusions 12 of the fastening means 11 provided on the front end surface 10a and the rear end surface 10b of each segment 10 fit into the recesses 13,
Connection is also made in the direction of the axis 21c of the shield body 21b.

Therefore, there is no need for an operator to position the segments 10 or to fasten them to each other as in the prior art, and the segments 10 can be assembled extremely quickly and accurately.

A coil spring 60 is fitted onto the spline of the gear shaft 59 shown in FIG. 8, which biases the gear 51 in the direction of arrow 61 and prevents the gear 51 from deviating from the discontinuous groove 17. However, segment 10 in the shield jack 22 described above
During the pushing operation, the gear 5 meshed with the discontinuous groove 17.
1 is slidably displaced in the direction of arrow 62 against the coil spring 60, making it possible to move the segment 10 in the direction of arrow 58 shown in FIG. 5 as described above.

When the mutual connection of the segments 10 is completed, the segment feeding body 25 moves into the cylinder 63 shown in FIG.
The segment 10 is rotated upward at the arrow 64.
is separated from the inner surface 10A.

After the assembly of one annular segment is completed, as shown in FIG. 5, when the shield main body 21b moves forward by pressing the front end 7a of the tunnel wall 7 with the shield jack 22, the segment is assembled for the next annular segment. The transport body 25 also moves forward together. Therefore,
When the cylinder 63 is driven to return the feeding means 49 and the guide means 54 to their original states, the new segment 10 carried in by the segment carrying-in transfer body 24 described above can be transferred.

By the way, when the segment to be transferred is the top segment 10N, when it is transferred as shown in FIG.
The cylinder 66 of the N positioning body 26 moving back and forth in the direction of the arrow 65 urges the roller pin 67 to the inner surface 10A of the top segment 10N. Since the top segment 10N is being transferred in the direction of arrow 68, the roller pin 67 urged by the cylinder 66 rotates, and when the positioning hole 18 comes to the position of the roller pin 67, the roller pin 67 is inserted into it. When this insertion is detected and the gear 51 of the nearest segment feeder 25 is stopped using this signal, the top segment 10N is held at that position.

Top segment 10N held in this way
The other segments 10 are connected one after another in the above-described procedure, and finally the key segment 10R is fitted as shown in FIG.

In assembling the segments described above, for example, when assembling the right semicircular arc segment and then assembling the left semicircular arc segment, the carried segment is moved along with the segment carrying transport body 24 using the cylinder 69 shown in FIG. By tilting in the direction of mark 70, the key segment 10R can be smoothly and statically transferred without interfering with the end 10M' of the already assembled lower end segment 10M adjacent to the position where the key segment 10R is to be inserted.

As shown in FIG. 4b for the segment 10M and as shown in FIG. In principle, the segments other than the top segment 10N may not have the positioning holes 18 formed therein.

When the segments 10 are assembled into an annular shape, the band-shaped sealing tapes 20 attached to the front and rear end surfaces 10a, 10b and left and right end surfaces 10c, 10d of each segment adhere to each other, ensuring watertightness. Then, the backfilling agent 6 is injected from each grout hole 19, and the segment 10 is firmly attached to the tunnel wall 7.
form.

As described in detail above, the present invention provides fastening means on the front and rear end surfaces of each segment and, if necessary, on the left and right end surfaces, and also provides a discontinuous groove in the circumferential direction of the inner surface of the arc-shaped segment in which a gear or the like is engaged. engraved, all segments from the top segment to the key segment are automatically brought in, transported, and
It can be positioned and fastened, eliminates the need for a large number of workers as in the past, and avoids heavy labor in poor work environments where dust and the like are scattered, and allows for rapid and accurate automatic assembly of tunnel walls.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional segment, Figure 2 is a sectional view showing the conventional segment assembly state, and Figure 3 is a perspective view of a conventional segment.
Figure a is a perspective view of an embodiment of the segment of the present invention;
Figure 3b is a cross-sectional view taken along the - line in figure a, Figure 3c is a cross-sectional view taken along the line -2 in figure a, and Figures 4a and b show a segment that does not have fastening means at one or both of its front and rear ends. 5 is a sectional view, and FIG. 6 is an installation diagram of an automatic segment assembly device for assembling segments of the present invention.
The figures are a cross-sectional view taken along the line -- of FIG. 5, FIG. 7 is a perspective view of the segment transporting body, FIG. 8 is a perspective view of the segment transport body, FIG. 9 is a cross-sectional view showing the assembled state of the segments, and FIG. 10 11 is an installation view of the positioning body of the tail plate ceiling, and FIG. 11 is a sectional view showing the key segment assembled state. 10... Segment, 10a... Front end surface, 10
b... Rear end surface, 10c... Left end surface, 10d...
Right end surface, 10A...inner surface, 11, 14... fastening means, 12, 15... protrusion, 13, 16... recess, 17... discontinuous groove, 18... positioning hole, 2
0...Seal tape.

Claims (1)

[Claims for Utility Model Registration] (1) A tunnel wall construction characterized by having concave and convex fastening means on the front and rear end surfaces of arc-shaped segments, and discontinuous grooves carved in the circumferential direction on the inner surface of the segments. segment for. (2) The segment for constructing a tunnel wall according to claim 1, which is characterized by having concave and convex fastening means on the left and right end faces of the segment. (3) The segment for constructing a tunnel wall according to claim 1 or 2 of the utility model registration claim, characterized in that a positioning hole is formed on the inner surface. (4) The segment for constructing a tunnel wall according to any one of claims 1 to 3 of the claims registered as a utility model, characterized in that a sealing tape is affixed to the front and rear end faces and left and right end faces of the segment.