JP2554932B2 - Composite section shield method - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a composite cross-section shield construction method, and more particularly to a construction method for freely joining or branching an adjoining tunnel.

"Problems to be solved by conventional techniques and inventions" Generally, in a subway, a road tunnel, or a tunnel such as a common ditch, separate single-line tunnels are combined into a composite section at a station or a confluence. There are many cases where this united part is branched into a single-line tunnel.

Conventionally, it is difficult to branch and combine tunnels, and in mountain tunnels, etc., widening and branching is often constructed by the NATM method.

Also, in urban tunnels, a shaft is installed at the coalescing point, and the coalescing part is made up of structures such as manholes and box culverts.However, considering the place to install the shaft and the construction cost, it is hoped that the shield machine will branch smoothly. The current situation is that it is rare.

Further, conventionally, in road tunnels, subway station sections, and union sections of tunnels, roof shields, widening shields, and other construction methods have been adopted, but the degree of freedom is small, which is a difficulty in designing.

"Means for Solving the Problems""FirstInvention" Circumferential cut holes are provided facing each other adjacent to the skin plate at the rear of the cutter face of the shield machine that is adjacent to each other. A remaining cutter that can fit in the gap between the shield machines is provided between the cut holes, and an arc-shaped remaining skin plate that covers the adjacent part of the skin plate of the shield machine behind the remaining cutter is attached and detached. Freely installed, a cutout is provided in the skin plate of the attached shield machine below the tail part of the remaining skin plate, and the remaining shield between the attached shield machine is excavated by the remaining shield machine simultaneously with the excavation by the attached shield machine. By lining the tunnels and their remaining parts together, they can be assembled between the shield machines without the construction of a vertical shaft. We propose a method which is adapted to single wire tunnel separated by only installing a dismantling universal and auxiliary shield machine can be smoothly and economically combined.

"2nd invention" After constructing the united part by the 1st invention, the remaining cutter and the remaining skin plate cut off from the skin plate of the shield machine with attachment are left and the cut holes and notches in the skin plate of the shield machine with attachment are blocked. Based on this, we propose a construction method that allows each separated shield machine to branch into a single-line tunnel and excavate so that separate single-line shield tunnels can be easily constructed subsequent to the construction of the united portion.

[Embodiment] An embodiment of the present invention shown in the drawings will be described below.

[First Invention] In the shield machines 1, 1 which are adjacent to each other in two groups, a circumferential cutout hole 4 is provided so as to face the adjacent portion of the skin plate 3 behind the cutter face 2. The remaining cutter 5 is installed between the cut holes 4, 4.

The remaining cutter 5 is used to excavate the drum-shaped remaining portion in the middle of the excavation section by the attached shield machine 1,1.
It is formed in a shape such as a drum shape that can be fitted in the gap between 1 and so that it can be advanced between the shield machines 1 and 1 while leaving it between the shield machines 1 and 1 It has become.

An arc-shaped remaining skin plate 6 covering this portion is connected to the skin plate 3 of the side-by-side shield machine 1, 1 behind the remaining cutter 5 so as to be cut off.
Cutouts 7 are provided facing each other on the skin plates 3 of the side-by-side shield machines 1, 1 below the tail portion of the remaining skin plate 6, whereby the skin plate is formed.
3, 3 and the tail part of the remaining skin plate 6 form a series of three mountains and are released in series. In this part, the lining of the composite cross section that integrates the tunnel by the shield machines 1, 1 and the remaining tunnel between them (segment) (Assembly of, or concrete pouring on site).

When the single line tunnel is dug by each of the shield machines 1, the cut holes 4 and the cutouts 7 are closed by the closing plates 8 and 8 '.

In this case, the sealing plates 8 and 8'are the skin plates 3
It can be configured such that it is slidably incorporated in the vicinity of the cut hole 4 and the cutout portion 7 therein, and the slide movement is performed at any time to open and close the cutout hole 4 and the cutout portion 7.

After constructing a single-line tunnel by the side-by-side shield machines 1 and 1 with the above-mentioned configuration, when joining them and constructing a united portion, the sealing plate 8 is removed to open the cut hole.
The remaining cutter 5 is installed between 4 and 4, the cutter face 2 is installed behind it, and the blocking plate 8'of the notch 7 is removed and opened.

Then, at the same time as excavating with the cutter haze 2 of the side-by-side shield machine 1,1, simultaneously excavating with the remaining cutter 5, at the series of tail portions of the skin plates 3,3 and the remaining skin plate 6, tunnels by the side-by-side shield machine 1,1 and Lining is performed by combining the remaining parts.

[Second Invention] After branching into a single-line tunnel after constructing the united portion according to the first invention, the remaining skin plate 6 is cut off from the skin plate 3 of the side shield machine 1,1 and the side shield machine 1,1. Cut-out holes 4 in 1 skin plate 3
After the notch 7 is closed by the closing plates 8 and 8'and the remaining cutter 5 and the remaining skin plate 6 are left, the parallel shield machines 1 and 1 are dug to construct a branched single-line tunnel 9.

[Advantages of the Invention] As described above, according to the present invention, the subway station and the lining tunnel, or the confluence and branch of the road tunnel, etc., triple-composite cross-section shield to single-line parallel, or single-line parallel to triple-composite cross-section Switching to the shield is in place
One shield machine can be used for a series of construction work without constructing a difficult shaft due to construction costs.

[Brief description of drawings]

FIG. 1 is a front view of a composite cross-section shield machine used in the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a plan view of a single-line construction of the shield machine used in the present invention, and FIG. 5A and 5B are plan views showing a construction state, and FIGS. 5A and 5B are front views showing a tunnel having a composite cross section and a single wire section constructed according to the present invention. 1 ... Side-by-side shield machine, 2 ... Cutter face, 3 ...
... Skin plate, 4 ... cut hole, 5 ... remaining cutter, 6 ... remaining skin plate, 7 ... notch, 8,8 '
...... Blocking plate, 9 ...... Single line tunnel.

Front page continued (73) Patent holder 999999999 Nippon Shield Engineering Co., Ltd. 2-6-2 Otemachi, Chiyoda-ku, Tokyo (73) Patent holder 999999999 2-6 Otemachi, Chiyoda-ku, Tokyo No. 3 (72) Inventor Koji Hoshino 2-6-6 Haneki, Setagaya-ku, Tokyo (72) Inventor Hideki Kurosawa 263-6 Kanamori, Machida-shi, Tokyo (56) Reference JP 62-242096 (JP, JP, A)

Claims (2)

(57) [Claims] 1. A circumferential cutting hole is provided opposite to the adjacent portion of a skin plate behind a cutter face of a shield machine which is adjacent to each other, and the adjacent shield is provided between the cutting holes. A remaining cutter that can be fitted into the gap between the machines is provided, and an arc-shaped remaining skin plate that covers the adjacent portion of the skin plate of the above-mentioned shield machine behind the remaining cutter is detachably provided. A cutout is provided in the skin plate of the attached shield machine below the tail part of the plate, and the remaining shield between the attached shield machines is excavated by the remaining cutter simultaneously with the excavation by the attached shield machine, and the tunnel by the attached shield machine. And a composite cross-section shield method characterized by performing a lining that integrates the remaining portions thereof. 2. A peripheral cutout hole is provided opposite to the adjoining portion of the skin plate in the rear of the cutter face of the shield machine which is adjacent to each other, and the adjacent shield is provided between the cutout holes. A remaining cutter that can be fitted into the gap between the machines is provided, and an arc-shaped remaining skin plate that covers the adjacent portion of the skin plate of the above-mentioned shield machine behind the remaining cutter is detachably provided. A cutout is provided in the skin plate of the attached shield machine below the tail part of the plate, and the remaining shield between the attached shield machines is excavated by the remaining cutter simultaneously with the excavation by the attached shield machine, and the tunnel by the attached shield machine. And after lining the remaining parts together, the remaining part cutter and the skin pre-applied to the side shield machine. It is characterized in that the remaining skin plate cut off from the box is left, the cut holes and cutouts in the skin plate of the attached shield machine are blocked, and then the single shield tunnel is branched and digged by each of the attached shield machines. Composite cross section shield method.