JPH0765477B2 - Tunnel cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a tunnel cutting device used for repairing a railway tunnel for a commercial line.

<Problems to be Solved by the Present Invention> The concrete on the inner surface of a tunnel such as a railway deteriorates and collapses or cracks due to long-term use. Tunnel repair work for placing concrete is required.

However, when repairing tunnels such as railways on business lines, it is necessary to perform repair work within a limited short time from the last train to the first train, so it is difficult to work efficiently and reliably. .

<Purpose of the present invention> The present invention has been made to solve the above problems, and in the case of tunnel repair work, etc., the concrete of the tunnel can be cut quickly, easily, and reliably. An object is to provide a cutting device for a tunnel.

<Structure of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the tunnel repair work will be described as an example.

<a> Bogie (Fig. 1) The bogie 1 has wheels 11 and is a rail laid inside the tunnel.
It is configured so that it can run on 12 roads.

On this trolley 1, rail members 13 having an H-shaped cross section are arranged at intervals.
Are installed in the extension direction of the tunnel.

<B> Slide Plate (FIG. 1) The slide plate 14 is a plate-like member slidably attached to the rail member 13 on the carriage 1 so that it can slide in the extension direction of the tunnel.

The slide plate 14 may be slid by a hydraulic device or the like.

<C> Turntable (Fig. 1) The turntable 15 is a disc mounted on the slide plate 14 so as to be rotatable by a motor or the like.

On the turntable 15, a plurality of vertical expansion and contraction jacks 16 that can be expanded and contracted vertically are attached.

<D> Boom support pedestal (Fig. 1) The boom support pedestal 2 is constructed by attaching side plates 22 at right angles to the edges of the bottom plate 21 attached to the upper ends of the vertical telescopic jacks 16.
An arch-shaped member 23 is laid across the ends of the side plate 22 and the side plate 22 to form a fan shape.

A rack 24 is formed on the outer peripheral surface of the arch-shaped member 23.

At this time, the distances from the corners 25 formed by the bottom plate 21 and the side plates 22 to the rack 24 are equal to each other.

<E> Boom (Fig. 1) The boom is composed of the base boom 3 and the tip boom 31.

(1) Base end boom The base end boom 3 is a plate-like body whose one end is pivotally supported by the corner portion 25 of the boom support base 2.

A pinion 32 is attached to the base end boom 3 so as to mesh with the rack 24 of the arm-shaped member 23.

The pinion 32 is rotated by the undulating hydraulic motor 33 and moves on the outer peripheral surface of the arch-shaped member 23.

Therefore, the base boom 3 can rotate around the corner 25 in the circumferential direction of the tunnel.

(2) Tip Boom The tip boom 31 is a plate-like body pivotally supported on the free end of the base boom 3.

The boom jack is attached to the tip boom 31 and the base boom 3.
Both ends of 34 are pivotally supported.

The boom jack 34 is hydraulically expanded and contracted so that the distal boom 31 and the proximal boom 3 can be bent.

<F> Drum Case (FIG. 2) The drum case 4 is a box that houses a cutter drum 5 and a disk cutter 6 described later.

A tip boom 31 is pivotally supported near the lower end of the drum case 4, and one end of a pressing arm 41 is pivotally supported near the upper end so as to be horizontally mounted.

The other end of the pressing arm 41 pivotally supports one end of the rotary arm 42, and the other end of the rotary arm 42 pivotally supports the tip boom 31 to form a link mechanism.

One end of a pressing jack 43 is pivotally supported on the connecting portion between the rotary arm 42 and the pressing arm 41, and the other end is pivotally supported on the tip boom 31.

A wire 44 is stretched between both ends of the pressing jack 43, and a stroke detector 45 for detecting the stroke of each jack is installed.

Once the predetermined cutting depth of the concrete 7 is set, the stroke of each jack is confirmed by the stroke detector 45, and it is used as a guide for setting the position at the next point after the movement.

The stroke of each jack at this time may be digitally displayed.

The drum case 4 has a surface open to the inner peripheral surface of the tunnel, and the rotary shaft 46 is positioned in the drum case 4 in a vertical direction substantially parallel to the inner peripheral surface of the tunnel.

The rotary shaft 46 is rotated by a cutter drum hydraulic motor 47 attached to the end of the drum case 4.

<G> Cutter drum (FIGS. 2 and 3) The cutter drum 5 is a cylinder having a plurality of cutting bits 51 on the surface.

The cutter drum 5 is rotatably attached to the rotary shaft 46.

The rotation torque of the cutter drum 5 is variable, and the cutter drum 5 is configured to be rotatable forward and backward.

As the cutting bit 51, one that matches the strength of the concrete 7 is used.

For example, a toe type for scraping concrete 7 and a cutter type for cutting are appropriately arranged on the surface of the cutter drum 5.

Further, the cutting bit 51 is replaceably attached by a bit holder 52.

<H> Disc cutter (Figs. 2-4) The disc cutter 6 is a rotary shaft 46 at both ends of the cutter drum 5.
Two disc-shaped cutters rotatably mounted on top.

As shown in FIG. 4, the disc cutter 6 can freely select the taper angle with respect to the inner peripheral surface of the tunnel.

The diameter of the disc cutter 6, when attached to the rotary shaft 46,
The cutting bit 51 is formed to have a size that slightly protrudes from the tip.

Therefore, the concrete 7 can be cut slightly ahead of the cutter drum 5.

The disc cutter 6 is rotated by a disc cutter hydraulic motor 61 attached to the end of the drum case 4.

<Cutting Method by Device of the Present Invention> First, the device of the present invention is placed on the rail 12 laid in the tunnel.

<A> Determination of Cutting Position The turntable 15 is rotated so that the cutting bit 51 of the cutter drum 6 faces the concrete 7 side.

When cutting concrete 7 on the wall of the next line,
Turn the turntable 15 180 degrees.

When setting the height of the cutting place of the tunnel, the vertical expansion / contraction jack 16 is expanded / contracted, the pinion 32 is rotated to move on the rack 24, and the proximal boom 3 is rotated in the circumferential direction of the tunnel for cutting. Set the height.

Further, the boom jack 34 is expanded and contracted to raise and lower the tip boom 31.

Next, the pressing jack 43 is expanded and contracted, and the drum case 4
Is rotated around the connecting portion with the tip boom 31 to position the cutter drum 5 so as to be substantially parallel to the inner peripheral surface of the tunnel.

<B> Cutting of concrete After the cutting position is determined, the slide plate 14 is moved in the extension direction of the tunnel, and the concrete 7 is cut into strips.

When cutting, as shown in FIGS. 5 and 6, concrete 7 is cut alternately on the left and right at a required interval according to the properties of the tunnel, and the concrete is sequentially cut by a spraying machine from the place where the cutting is completed. I will set it.

FIG. 7 is a view showing a cutting state of concrete 7,
By performing the preceding cutting with a width wider than the cutting bit 51 by the disc cutter 6, it is possible to reliably cut the concrete 7 within a predetermined range.

Further, by cutting the edge with the surrounding concrete 7 with the disk cutter 6, it is possible to alleviate the vibration of the surrounding concrete 7 during cutting.

<C> Cutting by taper angle The taper angle of the disc cutter 6 is as shown in FIG.
The disk cutter 6 is provided so that its tip is narrowed to cut the concrete 7.

As a result, the cut portion of the concrete 7 is formed so as to gradually expand toward the opening.

New concrete 8 is placed in this cutting portion.

Next, as shown in FIG. 9, similar cutting is performed by overlapping the taper surface of the end portion of the concrete 8 that has already been cast.

That is, the triangular overlapping portion 81 is provided for cutting.

Then, again, the concrete 8 including the overlapping portion 81 is poured.

In this way, the cutting part is tapered and the concrete 8
By pouring, it is possible to improve the adhesion with the newly placed concrete 8 and prevent the risk of flapping off until the required strength of the concrete 8 is obtained.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<B> The apparatus of the present invention can freely determine the cutting position in the tunnel by operating the jack, pinion and rack.

Therefore, if a truck equipped with a cutter drum or the like is installed at a predetermined position, a wide range of concrete can be cut without moving the truck.

Therefore, it is not necessary to move the entire apparatus every time the cutting position is changed, the working time can be shortened, and the work can be performed easily.

As a result, as described above, even in the case where it is necessary to perform the work within a limited short time from the last train to the first train in the repair work of the railway tunnel of the commercial line, it is possible to sufficiently deal with the work.

<B> By rotating the turntable, the concrete on the wall surface of the adjacent route can be cut.

Therefore, it is possible to save the time and effort for moving the truck to the adjacent route.

<C> With the disc cutter, the preceding cutting can be performed with a width wider than the cutting bit.

Therefore, it is possible to reliably cut the deteriorated concrete within a predetermined range.

<D> Edge cutting with surrounding concrete can be performed by preceding cutting with a disc cutter.

Therefore, it is possible to mitigate the vibration of the surrounding concrete during cutting.

<D> In the disc cutter of the present invention, the taper angle with respect to the inner peripheral surface of the tunnel can be freely selected.

Therefore, when the taper angle of the disk cutter is narrowed toward the tip of the disk cutter and the concrete is cut, the cut portion of the concrete is formed in a taper shape so as to widen toward the opening.

Therefore, by placing concrete on the cutting portion provided with the taper, it is possible to improve the adhesion to the newly placed concrete.

Therefore, until the required strength of the concrete is obtained, it is possible to prevent the danger of falling off.

[Brief description of drawings]

FIG. 1: Explanatory diagram of an embodiment of the device of the present invention FIG. 2: Enlarged view of the tip of a boom FIG. 3: Explanatory diagram of a cutter drum FIG. 4: Explanatory diagram of a disk cutter with a taper 5, Fig. 6: Explanatory drawing of tunnel excavation method Fig. 7: Explanatory drawing showing preceding cutting with a disc cutter Fig. 8: Explanatory drawing of a state in which cutting is performed with a disc cutter having a taper Fig. 9: Providing a taper Explanatory drawing of the state in which concrete is newly placed in the cutting part of the concrete

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Iwamura Iwamura 1-2-1 Okura, Setagaya-ku, Tokyo Kinuta Park Himiko Mansion B-312 (56) Reference JP-A-57-116896 (JP, A) 54-59722 (JP, U)

Claims (1)

[Claims] 1. A bogie capable of traveling on rails laid in a tunnel, a slide plate slidably mounted on the bogie in an extension direction of the tunnel, and a turntable rotatably mounted on the slide plate. On the turntable, there is a boom that is rotatably mounted in the circumferential direction of the tunnel, and a rotating shaft that is pivotally supported by the free end of the boom and that is located substantially parallel to the inner surface of the tunnel. Cutting a tunnel, characterized by a cutter drum that can be cut and a disk cutter that is located coaxially on both ends of the cutter drum, has a larger diameter than the cutter drum, and can change the cutting angle of concrete. apparatus