JPH10252376A - Hot line tunnel widening device and widening method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute safety work and enhance work efficiency in simple structure. SOLUTION: This hot-line tunnel widening device comprises a movable protection shelter 2 laid out on the inner surface of a na existing tunnel, a movable work rack 3 provided on the movable protection shell 2, an excavation device 4 provided on the movable work rack 3, a support device 5, an operator compartment 6 and a mucking device set up outside the protection shelter 2. In this case, a rail 1 is set up on the subgrade of the existing tunnel and the protection shelter 2 is laid out on the rail 1 and then the movable work rack 3 is loaded on the movable protection shelter 2. The movable protection shelter 2 and the movable work rack 3 are adapted to move toward a cutting face in parallel with the axial direction of the tunnel. The excavation device 4 provided on the movable work rack 3, the support device 5 and the operator compartment 6 are moved along a slit area in the direction at right angles with the axial direction of the tunnel, thereby executing excavation work and conveying excavated earth and sand and support waste material outside the pit with the mucking device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-line tunnel widening apparatus and a widening method for widening a tunnel without hindering use of an existing tunnel.

[0002]

2. Description of the Related Art Tunnel widening work has been increasing due to recent increases in traffic and renewal of aging tunnels. For this reason, tunnels were closed for a long period of time and construction was carried out. However, according to this method, not only the construction cost for the construction of the detour line is increased, but also there is a problem that a user is greatly troubled. Further, a method of widening a tunnel without providing a detour line and without hindering use of an existing tunnel has also been proposed. (Tokuhei 2-3
6755) However, this method was not always the best method because the construction period and construction costs were high, such as the need to excavate an advanced side wall tunnel on both sides of the existing tunnel and construct the side wall.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a simple structure.
An object of the present invention is to provide a hot-line tunnel widening device and a widening method capable of widening a tunnel without hindering use of an existing tunnel.

[0004]

A hot-line tunnel widening device for widening a tunnel without hindering use of the existing tunnel, comprising: a mobile protective shelter disposed on the inner surface of the existing tunnel; and a mobile protective shelter. A mobile work platform provided on the mobile work platform, an excavating device, a shoring device, an operator room provided on the mobile work platform, and a shearing device installed outside the mobile protective shelter. The mobile protective shelter has a rail receiving portion for moving on a rail installed on the roadbed of an existing tunnel in parallel with the axial direction of the tunnel, and has a predetermined outer peripheral surface. A live line tunnel widening device characterized in that a guide projection is provided at a location in parallel with the axial direction of the tunnel, and the movable work platform is an arc-shaped flat box. It has irregularities on the upper and lower sides of the inner surface of the flat box, incorporates a gear that meshes with the irregularities, and has a slit on the flat box surface in a direction perpendicular to the tunnel axis. It is a live line tunnel widening device, and the excavating device, support device, and operator room provided on the movable work platform are connected to gears built in the movable work platform, respectively, and are mounted on the surface of the movable work platform. A hot-line tunnel widening device characterized by moving along a slit portion provided, and a hot-line tunnel widening method for widening the tunnel without hindering use of the existing tunnel. After installing the rail on the roadbed of the tunnel and arranging the mobile protective shelter on the rail, the mobile work platform is placed on the mobile protective shelter, and the mobile protective shelter and mobile work The gantry is moved toward the face in parallel with the axis of the tunnel, and the excavator, support device and operator room provided on the movable work gantry are moved along the slit at right angles to the tunnel axis. This is a method for widening a hot-line tunnel, characterized in that excavation work and shoring work are performed, and excavated earth and sand and shoring waste material are carried out of the pit by a shearing device.

[0005]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<A> Overall Configuration of Hot-Line Tunnel Widening Apparatus FIG. 1 is a perspective view showing the overall configuration of a hot-line tunnel widening apparatus according to the present invention. The widening device includes a rail 1 installed on the roadbed of the existing tunnel T, a movable protective shelter 2 that is disposed on the inner surface of the existing tunnel T so as to be movable in the horizontal direction, and runs on the rail 1, and a mobile protective shelter 2. A mobile work platform 3 provided on the top, an excavator 4, a support device 5, and an operator room 6 provided on the mobile work platform 3,
It is composed of a shovel 7 installed outside the mobile protective shelter 2 and a slip-off device for a belt conveyor 8.

<B> Rail The rail 1 is installed on the roadbed of the existing tunnel T, and is laid over the entire length of the widening section. Also rail 1
Is extended further to the light part outside the wellhead of the existing tunnel T.

<C> Mobile Protective Shelter FIG. 2 shows a mobile work platform 3 on a mobile protective shelter 2.
It is a front view showing the state where was mounted. A guide projection 21 is provided at a predetermined position on the outer peripheral surface of the movable protection shelter 2 in parallel with the axial direction of the tunnel. Further, rail receiving portions 22 are provided at both ends of the movable protective shelter 2 so that the movable protective shelter 2 can move on the rail 1 in the axial direction of the tunnel. The mobile protective shelter 2 is made of an iron plate or the like having a size that can be accommodated with a margin on its inner peripheral surface in accordance with the cross section of the existing tunnel T, and has a strength enough to resist external force such as rock falling due to excavation work. ing.

<D> Mobile work platform On the inner peripheral surface of the mobile work platform 3, wheels 31 are provided for fitting into the guide projections 21 and moving. FIG.
FIG. 3 is a perspective view of the entire movable work platform 3, in which a slit 32 is provided in a direction perpendicular to the axis of the tunnel. FIG.
Shows a partially enlarged front view of the movable work base 3, in which concave and convex portions 33 are formed on the upper and lower surfaces of an arc-shaped flat box-shaped inner surface, and a gear 34 that engages with the concave and convex portion 33 is built in. . The gear 34 is connected to respective support portions 35 of the excavator 4, the support device 5, and the operator room 6, which will be described later, and is configured to move along a slit 32 provided in a direction perpendicular to the axis of the tunnel. Similar to the mobile protective shelter 2, the movable work platform 3 is made of an iron plate or the like having a strength enough to resist external forces such as rock fall due to excavation work and loads on the excavator 4, the support device 5, and the operator room 6. ing.

<E> Excavator The excavator 4 moves along the slit 32 of the movable work platform 3 closest to the widening face E, and the existing breaker, road header and cutting machine are built in the movable work platform 3. Gear 34 and a supporting portion 35.

<F> Supporting device The supporting device 5 is a slit 3 at an intermediate portion of the movable work platform 3.
2, a rock bolt drilling drill for spraying a tunnel, a sprayed concrete robot, and the like are connected by a gear 34 and a support 35.

<G> Operator Room The operator room 6 moves along the slit 32 of the movable work base 3 farthest from the widened face E, and operates the work by the excavator 4 and the support device 5.

<H> Sliding device A shovel 7 is arranged near the widening face E outside the movable protective shelter 2, and the belt conveyor 8 is arranged over the entire extension of the widening section to form a shearing device.

[0014]

With reference to the accompanying drawings, a live line tunnel widening method according to the present invention will be described in the order of construction.

<A> Laying of Rails As shown in FIG.
Will be laid over the entire length of the widening section. The rail 1 is laid so as to extend further to a light portion outside the wellhead of the existing tunnel T.

<B> Installation of Mobile Protective Shelter A mobile protective shelter 2 is installed on a rail 1 which is further outside the tunnel of the existing tunnel T and is laid so as to extend to the light. As an installation method, an arbitrary method may be adopted, such as hanging with a crane or placing in parallel with the rail 1 and moving the apparatus horizontally. Since the work is completed in a short time, traffic must be cut off only during this work. Further, the mobile work platform 3 may be installed on the mobile protective shelter 2 in advance, and may be installed on the rail 1 at the same time.

<C> Installation of the movable work platform The wheels 31 provided on the inner peripheral surface of the movable work platform 3 are fitted and installed on guide projections 21 provided at predetermined positions on the outer peripheral surface of the mobile protective shelter 2. I do. (FIGS. 1 and 2) This operation may be performed in another place in advance as described above.

<D> Installation of Excavator, Shoring Device, and Operator Room The excavating device 4, the supporting device 5, and the operator room 6 are installed on the movable work base 3. The installation method is as shown in FIG.
Further, since a gear 34 that meshes with the concave and convex portion 33 is incorporated therein, the gear 34 and the excavator 4, the support device 5, and the operator room 6 are connected and installed via the support portion 35, respectively.

<E> Movement of Mobile Protective Shelter After installation of the device for widening the hot-line tunnel is completed, the mobile protective shelter 2 on the rail 1 is moved toward the widening face E by any method. (Fig. 1) Since the mobile protective shelter 2 has a shape that can be inserted along the inner peripheral surface of the existing tunnel T, it is inserted to a position where sufficient safety is secured according to the excavation work capacity and traveling speed. Must.

<F> Position Adjustment of Mobile Worktable Along the guide projections 21 of the mobile protective shelter 2, operation of the excavator 4 and support device 5 on the mobile worktable 3 and operation in the operator room 6 Adjust the position of the mobile work platform so that is at the optimal position.

<G> Excavation and Supporting Work In accordance with the monitoring operation in the operator room 6, the excavating apparatus 4 and the supporting apparatus 5 are remotely operated to start the widening work of the widening face E. After the widening operation, the existing tunnel T is removed. The shoring work involves the installation of rock bolts and the primary spraying of concrete. Especially when the widening area is narrow, the installation of rock bolts is performed diagonally forward and it is difficult to support with H steel. Such as shoring only support. After the primary support work is completed, secondary lining will be performed to complete the widening of the tunnel.

<H> Sliding work The falling rocks, earth and sand, waste materials, and the like are carried out of the mine by a sling removal device including a shovel 7 and a belt conveyor 8 installed outside the movable protective shelter 2.

[0023]

Since the present invention has been described above,
The following effects can be obtained. <A> Traffic in tunnels can be constructed without interruption for a long period during the construction period. <B> During tunnel widening work, the existing tunnels are protected by mobile protective shelters, so tunnel users are safe. <C> During the widening of the tunnel, the existing tunnel is protected by a mobile protective shelter, so the safety of the construction can be secured. <D> The tunnel widening device can move freely along the widened face, so that the working efficiency is improved. <E> The operator room that operates the tunnel widening device is
Since it is a close distance of the widened face, appropriate operation can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a hot-line tunnel widening device according to the present invention.

FIG. 2 is a front view showing a state where a movable work platform is placed on the movable protective shelter.

FIG. 3 is a perspective view of the entire movable work platform.

FIG. 4 is a partially enlarged front view of the movable work platform.

Claims (5)

[Claims] 1. A hot-line tunnel widening device for widening a tunnel without hindering use of the existing tunnel, comprising: a movable protective shelter disposed on an inner surface of the existing tunnel; and a movable protective shelter provided on the movable protective shelter. A liveline tunnel widening device comprising a mobile work platform, an excavator, a shoring device, an operator room provided on the mobile work platform, and a shearing device installed outside the mobile protective shelter. . 2. The hot-line tunnel widening device according to claim 1, wherein the movable protective shelter is a rail support for moving on a rail installed on a roadbed of an existing tunnel in parallel with the axial direction of the tunnel. A hot-line tunnel widening device, comprising: a guide projection provided at a predetermined position on the outer peripheral surface in parallel with the axial direction of the tunnel. 3. The hot-line tunnel widening device according to claim 1, wherein the movable work platform has an arc-shaped flat box shape, and has uneven portions on the inner surface of the flat box shape. A hot-line tunnel widening device having a built-in occlusal gear and a slit provided on a flat box-shaped surface in a direction perpendicular to the tunnel axis. 4. The hot-line tunnel widening device according to claim 1, wherein the excavating device, the supporting device, and the operator room provided on the movable work platform are respectively incorporated in the movable work platform. A hot-line tunnel widening device, which is connected to a gear and moves along a slit provided on a surface of a movable work platform. 5. A hot-line tunnel widening method for widening a tunnel without hindering use of the existing tunnel, wherein a rail is installed on a roadbed of the existing tunnel, and a movable protective shelter is arranged on the rail. After that, the mobile work platform is placed on the mobile protective shelter, and the mobile protective shelter and the mobile work platform are moved toward the face parallel to the axial direction of the tunnel and installed on the mobile work platform The excavator, the support equipment and the operator room are moved along the slit in the direction perpendicular to the tunnel axis, and excavation and support works are performed. A live line tunnel widening method characterized by carrying it out.