JPS5915189A - Method of starting branch tunnel excavator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for excavating a branch tunnel by starting an excavator from inside the tunnel.

Typically, tunnels constructed using the shield method are used for sewerage systems, acid-resistant wiring for electric power and communications, and underground railways. Such tunnels are formed by excavating earth and sand using the shield method and lining the excavated walls with cosiclete or steel. In the case of branching, the conventional shield construction method involves excavating a vertical shaft from the ground after tunnel excavation to construct the required branch tunnel.

However, in recent years, it has become extremely difficult to acquire land for shafts and carry out construction work due to worsening road conditions, absolute land shortages, and growing local residents' interest in environmental conservation.

The present invention has been made in view of the current situation and to solve these problems.The present invention is designed to solve these problems by starting an excavator from inside the tunnel in a predetermined direction and digging a desired branch tunnel without excavating a vertical shaft from the ground. This invention provides a method for starting a branch tunnel excavator, which is characterized in that it can be constructed.

To explain the embodiments of the present invention with reference to the drawings, (1) is a tunnel lining wall made of cosicrete that covers the inner surface of a tunnel (3) excavated in the ground (2), and (4) is the lining wall. At the part corresponding to the entrance of the branch tunnel (1), the corresponding part of the lining wall (1) is cut and removed to open it.

(5) is a cylindrical body arranged perpendicularly to the length direction of the douchinel (3), which corresponds to the shield machine's shield machine, and there is a cylinder around one open end. At appropriate intervals in the direction! ! Several pits (6) are installed, and the open ends of the pits (6) are installed so as to face the part of the tunnel lining wall (1) that corresponds to the branch tunnel entrance (4).

(7) is a Chisset cow jig device, and the outer circumference tl+ of the cylinder body (5)
A semicircular chuck frame with a curved surface equal to i (
7a) Bring (7a) into close contact with the outer circumferential surface of the cylinder (5) at an appropriate location,
A Java holder (hard (8)) is connected between the opposing ends, and the chuck frame +7a is
The cylinder body (5) is held by pressing the l47aj to the cylinder body (5). (9) (9) is a bolt fixed to the inner peripheral surface of the tunnel lining wall (1) in the longitudinal direction of the tunnel.
Chuck the rod (9a) with the chuck frame [
7h) is pivotally attached to a protruding piece (7b) protruding from the center of the outer circumferential surface of the tube (7h), so that the cylinder (5) can be swung left and right about the center of the cylinder (5).

This Javanese engineer (9) ((ri) has guide grooves (7) along the length of the cylinder (5) on both sides of the guide member sill fixed to the upper F part of the inner circumferential surface of the tunnel lining wall (1). A bracket (311G (11) installed in C1 (J is the propulsion mechanism, and multiple Javanese (1) From now on, the Javanese qυ
Tighten the 0 end of the V L/ -/, (7a) and attach it rotatably to the side of (7a). The fourth part is rotatably attached to the reaction wall @ provided on the tunnel lining wall (1) facing the part corresponding to the tunnel entrance (4) of the branch tunnel.

- First, the cylinder body (5) is held by activating the 5 cylinders (82) and tightening the cylinder body (5). 9) is not activated and the cylinder body (7) is rotated left and right.
5) also swings together with its center as the center of rotation, and in this state, if the Java driver (1υ) is activated to extend the propulsion mechanism QU, the cylinder (5) moves forward and the cylinder (5) The tip pit (
6) to cut the tunnel lining wall (1) into the cross-sectional shape of the cylindrical body (5) to open the branch tunnel entrance (4).
Next, with the tip of the cylinder (5) still penetrating the branch tunnel entrance (4), the cut portion of the lining wall is removed, and the chisetushishiji device (7) and propulsion mechanism are removed. Remove and remove.

Next, take a pit roller jig 02 to the tunnel lining wall (1) around the branch tunnel entrance (4), take a loose jig α to one link α of the tunnel entrance, and attach 11 pieces to the cylindrical body ( 5) to maintain watertightness by slidingly contacting the outer circumferential surface of the cylinder (5), and a partition wall (1Φ) is attached near the front end inside the cylinder (5), and the partition wall (14)
A cutter rotating shaft Q51, which is rotated by a drive (07), is rotatably supported in the center of the cutter 00, and a cutter 00 is fixed to the tip of the rotating shaft q9. In addition, the proper pressure of the bulkhead θ is determined by attaching a mud feeding and discharging pipe α to face the cutter head side, and at the rear peripheral part of the bulkhead 04 in the cylinder body (5), a plurality of pipes forming the cylinder propulsion mechanism are installed. Take out the face piece (5) with its D-rad end facing backward, and attach the tail seal paramushita (a) around the rear end of the face piece (5).

Furthermore, a branch toshinel lining sejimeshito is assembled between the Ot end of the Javanese (2) for cylinder propulsion and the tunnel lining wall (1) behind it via a reaction wall. The reaction force transmission member cA is installed.

In this state, drive the t-tarq force and excavate the force in the ground by rotating the cutter rib, and at the same time bring the ends of the reaction force transmitting member (tki K,; By extending the cutting machine υ, the cylinder body (5) is propelled, and the excavated soil is sent from the mud chamber ■ between the partition wall Q4) and the cutter (1), and the mud water circulating inside the mud drain pipe
□r j and discharge.

Thus Javanese 121. Due to the extension of l, the cylinder (5)
If it is pressed into the ground for a certain length, it will be inserted into the ground.
The reaction force transmitting member (c), which is a segment for conventional branch tunnel construction, is installed, and the ground is excavated and the cylindrical body (5) is press-fitted by the above-mentioned operation again.This is repeated to create a branch tunnel of the desired length. There is a C that forms .

As described above, the present invention involves installing a cylindrical body with a cutting pit at its tip in a predetermined position on a tunnel lining wall while holding it in place with a chisettling device, and then rotating the cylindrical body with the chisettling device. The tunnel lining wall is cut by the cutting hit at the tip of the cylindrical body as it is moved forward by the press-fitting mechanism, and then the cutter, the cutter drive device, and the propulsion mechanism are assembled into the cylindrical body to form a mechanical excavation shield machine. However, since the present invention relates to a method for starting a branch tunnel excavator, which is characterized in that the shield machine is started by the propulsion mechanism, the following various effects can be achieved.

■ A pit is attached to the cylindrical body, which corresponds to the shield machine's shield plate, and the branch tunnel entrance is opened.
A branch tunnel can be created from any position within the tunnel.

■ No vertical shaft is required to create branch tunnels.

■ There is no need for a special set-up for opening the branched tunnel pit.

■ It is economical because the cylindrical body is used both for cutting the tunnel lining wall at the branch tunnel entrance and as a sling plate for the shield machine for ground excavation. After penetrating into the ground, the excavation member is incorporated into the cylindrical body, making it possible to excavate from inside a narrow tunnel =j
It is Noh.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical cross-sectional side view showing a state in which a cylinder, a mount, and a propulsion device are installed in a tunnel, FIG. 2 is a front view thereof, and FIG. The figure is a longitudinal cross-sectional view showing a state in which the mouth of a branch tunnel is opened, the tip of the cylindrical body penetrates into the ground of the branch tunnel, and ground excavation equipment is installed. (1)...-Tunnel lining wall, (5)・Fist/cylindrical body, (6
)...e pit, (7)...Cisetsu beef shijiso W, QQ
”...Propulsion mechanism, Of9...Cutter, Qυ...Propulsion jitter 1cI4...Reaction force transmission member. Patent applicant: Okumura Co., Ltd. / Murabe Z Komushibe J Ha

Claims (1)

[Claims] ■ After installing the cylindrical body with a cutting pit at its tip in a predetermined position on the tunnel lining wall while holding it in place with the chisetsu shiji machine, rotate the cylindrical body with the chisetsu shiji machine while +i. The tunnel lining wall is cut by the cutting pit at the tip of the cylindrical body by advancing it by a press-fitting mechanism, and then a cutter, a cutter drive device, and a propulsion mechanism are assembled in the cylindrical body to form a mechanical excavation shield machine. A method for starting a branch tunnel excavator, characterized in that a shield machine is started by the propulsion mechanism.