JP2661988B2 - Tunnel lining equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining device for lining a dug wall of a tunnel with concrete.

Conventional equipment NATM is currently the standard tunnel lining method. This method has various advantages such as easy construction and short construction time because concrete is directly sprayed on the wall of the tunnel.

However, the shotcrete method uses high-pressure compressed air to spray concrete mixed with a quick-setting agent.
The generation of dust was inevitable. In addition, this dust has a serious problem because it may harm the health of workers. In addition, this method has a problem that the shot concrete material rebounds a lot and the concrete material loss is large.

The present invention solves the above-mentioned conventional problems, and provides a lining device for a tunnel in which generation of dust and the like and loss of concrete material are small even when a concrete spraying machine is used as a blowing means. Aim.

Means for Solving the Problems In order to achieve the above object of the present invention, the configuration is as follows.

(1) In a tunnel lining device for lining concrete with a wall of a dug tunnel, a box-shaped member having an open inner surface facing the wall of the tunnel and an inner surface inside the box-shaped member are provided. A blower, and an air blower that is on the outer surface side of the box-shaped member and communicates with the blower at least in an upper region, and a blower that blows concrete into the upper part of the blower includes the air blower. A lining device wherein suction means for sucking air is connected to each of the blowing sections.

(2) The above-mentioned (1), wherein the box-shaped member is divided into a blowing portion and an air vent portion by a partition plate, and at least an upper region of the partition plate is formed of a mesh.
A lining device according to item 1.

(3) The both side plate and the lower side plate of the blowing section are rotatably mounted between a blowing position forming a frame and a separating position opening outward from the blowing position. The lining device according to (1) or (2).

(4) The above-mentioned (1), wherein the blowing means has a blowing pipe for blowing a concrete material, and the blowing pipe is connected to an upper side of the blowing section so as to change the blowing direction. Lining equipment.

According to the first aspect of the present invention, even if the concrete material is blown by the force of air, dust and the like do not fly out of the box-shaped member, and the concrete material does not rebound. Then, the dust and the like are sucked from the blowing section through the air blowing section by the suction means, and can be processed through the dust collecting device. In addition, since the concrete material is blown from above the blowing portion, compaction of the concrete is improved, and high-density and high-quality concrete is obtained.

According to the second aspect of the present invention, since a mesh is used to separate the spray portion and the air release portion, only fine dust and air are sent from the spray portion to the air release portion, and concrete material is prevented from entering the air release portion. doing.

According to the third aspect of the present invention, after the concrete is blown, the operation is facilitated by moving the both side plates and the lower side plate of the blowing portion to the separating position and separating the box-shaped member from the concrete. Furthermore, when lining next to the already lined part, the plate on the adjacent side can be moved to the separating position, and the blown part can be constructed using one surface of the lining concrete.

According to the fourth aspect of the present invention, it is possible to move the blowing pipe to blow the concrete almost uniformly over the entire area in the blowing section.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a box-shaped member having an open inner surface, and the inside of the box-shaped member 1 is partitioned by a partition plate 2 into a blowing portion 3 and an air vent portion 4. The partition plate 2 is made of a steel plate from a lower portion to a predetermined height.
2a, the upper region above it is composed of a mesh 22b. The partition plate 2 is arranged so as to partition on a plane substantially parallel to the opening surface of the box-shaped member 1, and the blowing section 3 is located on the inner side facing the wall surface G, and the air vent section 4 is located on the outer side. In FIG. 1, the air vent 4 is indicated by a dotted line.

The blowing section 3 is attached to the air vent section 4 so that the side plates 5, 6 and the lower plate 7 can rotate in a direction to open outward. That is, the side plates 5, 6 and the lower plate 7 are rotatably mounted via a hinge 8 between a blowing position indicated by a solid line and a separating position indicated by a chain line in FIG. The upper side has a frame 9 on which a slide 10 is slidably mounted in the direction of arrow A. A bellows 11 is attached between the slide piece 10 and the frame 9 so as to allow sliding in the direction A, and is configured to close the inside of the frame 9.

A blowing pipe 12 of a concrete spraying machine (not shown) is connected to the slide piece 10 as blowing means, and the blowing pipe 12 is slid in the direction of arrow A by a slide driving device described later. The spraying machine of this embodiment uses a dry-type concrete spraying machine. Therefore, a concrete material mixed with a quick-setting agent in advance is sent to the blowing pipe 12 by a conveying force by air, and immediately before the blowing, the water ring 13 is used.
Supplies water. In the case where the spraying machine is a wet concrete spraying machine, the water ring 13 becomes unnecessary, but a supply pipe 14 indicated by a chain line is attached, and the quick-setting agent is supplied from the supply pipe 14.

The air vent 4 has a fan 16 as a suction means.
Is connected to the suction pipe 15 to apply a negative pressure to the air vent 4. In the middle of the suction pipe 15, as shown in FIG. 5, a water curtain 17 and a storage section 18 for storing the dust dropped by the water are provided, and an appropriate collection section is provided so as to clean the air passing through the fan 16. Dust means are provided.

In this embodiment, the box-shaped member 1 is supported by a support frame 19 via a connecting plate 20 as shown in FIGS. 2 and 3, and the support frame 19 is connected to a distal end arm 22 of a manipulator 21. (See FIG. 6). The support frame 19 is provided with opening / closing means for opening and closing the side plates 5, 6 and the lower plate 7, and a slide drive device for slidingly moving the blowing tube 12.

The opening / closing means is constituted by a cylinder 23 as shown in FIG. 2. The rod of the cylinder 23 is pivotally supported by the lower plate 7, and the rear end of the main body of the cylinder 23 is supported by the projecting portion 24 of the support frame 19. It is pivoted. In FIG. 2, the side plates 5 and 6 are not shown, but the side plates 5 and 6 are also provided with the cylinders 23 at the projecting portions 24 (two places) similarly to the lower plate 7.

The slide drive device has a belt 26 wound around a belt wheel 25 as shown in FIG.
A transmission plate 27 is connected to one traveling side of the transmission. The transmission plate 27
What is necessary is just to connect to the slide piece 10 or the blowing pipe 12, but in this example, it is connected to both the slide piece 10 and the blowing pipe 12. The belt wheel 25 is provided between the box-shaped member 1 and the support frame 19 as shown in FIGS. 2 and 3, and one shaft thereof is drivingly connected to a reversible motor 28. By driving the motor 28, the blowing pipe 12 is slid in the direction of arrow A via the belt wheel 25, the belt 26, and the transmission plate 27.

Reference numeral 29 denotes a sealing member made of sponge, rubber, or the like, which is attached to both side plates 5, 6, the lower plate 7, and the wall surface of the frame 9.

The operation mode of the lining device thus configured is as follows.

In FIG. 6, the opening side of the box-shaped member 1 is pressed against the wall surface G for lining, and when the position is determined, a spraying machine (not shown) is operated to start blowing concrete. At this time, the blown concrete is blown almost uniformly within the width of the box-shaped member 1 by moving the blowing pipe 12 in the direction of the arrow A by the slide driving device. By this blowing, air and dust are filled in the blowing portion 3 of the box-shaped member 1. These dusts and the like escape to the air blowing portion 4 through the mesh 2b, and
Exhausted through 15. At this time, the dust is dropped into the reservoir 18 by the water curtain 17, and the air discharged through the fan 16 is in a clean state. When the concrete is blown, the concrete material slightly rebands. However, since the blow portion 3 is a closed space and the passage to the air vent portion 4 is blocked by the mesh 2b, loss of the concrete material is prevented. .

Thus, when a predetermined amount of concrete is blown, the concrete hardens, at which time both side plates 5, 6 and lower plate 7
By operating each cylinder 23, the cylinder 23 is rotated from the blowing position to the separating position. Then, by pulling the manipulator 21 away in the direction of arrow B shown in FIG. 7, the first blowing operation is completed.

Next, when performing the second blowing on the lined concrete, as shown in FIG. 2, the lower plate 7 is previously held at the separated position. Then, the space of the blowing section 3 is formed using the upper surface of the previously blown concrete, and then the same operation as above is performed, thereby completing the second blowing. This operation is repeated, and as shown in FIG. 8, the concrete C is lined in the tunnel from below to above. When you blow the left and right walls G of the tunnel,
Although the top end portion T remains, only a small portion of the top portion T may be removed from the blowing pipe and sprayed with concrete. In addition, if there is blown concrete in the left and right side plates 5 and 6 after blowing, it is used in the same manner as the lower plate 7.

Thus, the present invention can provide a good tunnel lining that suppresses dust and does not cause loss of concrete.
In addition, since the concrete is blown from above, it is difficult for air voids to be formed in the concrete, and high-quality concrete with good compaction can be obtained.

9 and 10 show another embodiment of the present invention,
In this embodiment, the arm 22 of the manipulator is directly connected to the box-shaped member 1 without using the support frame 19. And blowing part 3
Is similar to the above embodiment, but the air vent portion 4 is reduced to the height using the mesh 2b above the box-shaped member 1.

A cylinder 23 that opens and closes both side plates and a lower plate of the blowing unit 3 is attached to an overhang 24 fixed to the box-shaped member 1. Furthermore, in this example, the transmission plate 27 is reciprocated by using a large cylinder 30 as a driving device that slides the blowing pipe 12.

The lining device thus configured can provide the same effects as those of the above embodiment.

As described above, the present invention and the preferred embodiments have been described.
The present invention is not limited to the above embodiments, but can be variously modified.

For example, in the embodiment shown in FIG. 1, the partition plate may use an entire mesh. When a steel plate is used for the partition plate, the mesh may be removed, and the blowing portion and the air vent portion may be in the same space only on the upper side.

Further, as the slide driving device for the blowing tube, a reciprocating driving means such as a rack and pinion, a rodless cylinder or the like can be appropriately used.

Furthermore, the blowing pipe is not limited to sliding movement,
As shown in the figure, it is also possible to pivot around the fulcrum 31 so that the blowing direction can be changed, and to blow concrete while operating like, for example, a pendulum.

Effects According to the above configuration, the present invention was able to prevent dust from being lost to concrete even by using a spraying machine.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a perspective view of a box-shaped member in which an air vent portion is omitted by a dotted line.
FIG. 3 is an overall sectional view, FIG. 3 is a side view thereof, FIG. 4 is a perspective view of a slide driving device, FIG. 5 is a sectional explanatory view showing an example of a dust collecting device, and FIGS. FIG. 8 is a perspective view and a sectional view showing another embodiment of the present invention, and FIG. 9 is a sectional view of a tunnel showing an example of the concrete lining shown in FIG. The figure is an explanatory view showing a modified example of the blowing pipe. DESCRIPTION OF SYMBOLS 1 ... Box-shaped member 2 ... Partition plate 3 ... Blow-out part 4 ... Air vent part 5, 6 ... Side plate 7 ... Lower plate 12 ... Blow-in tube 15 ... Tube 16 ... Fan

Claims (4)

(57) [Claims] 1. A tunnel lining device for lining concrete walls on an excavated tunnel wall, comprising: a box-shaped member having an inner surface opened to face the tunnel wall; and an inner surface inside the box-shaped member. Blowing part, having an air blowing part on the outer surface side of the box-shaped member and communicating with the blowing part in at least an upper region, blowing means for blowing concrete into the upper part of the blowing part, A lining device, wherein suction means for sucking air is connected to each of the air blowing sections. 2. The lining device according to claim 1, wherein the box-shaped member is divided into a blowing portion and an air vent portion by a partition plate, and at least an upper region of the partition plate is formed of a mesh. . 3. The blower according to claim 1, wherein both side plates and a lower side plate of the blower are rotatably mounted between a blow position forming a frame and a pull-out position opening outward from the blow position. The lining device according to claim 1. 4. The blow-up means according to claim 1, wherein said blow-in means has a blow-in tube for blowing a concrete material, and said blow-in tube is connected to an upper side of the blow-in portion so as to change its blowing direction. The lining device as described.