JP2001011875A - Shield machine, construction method for tunnel, and tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield machine or the like capable of excavating a shield and at the same time maintaining the stability of a shield tunnel in the shield tunnel exposed partially on a water bottom. SOLUTION: A shield machine 1 constructs a segment 33 while excavating ground in the state where it is partially exposed from a water bottom 39, and at the same time advances while applying anti-washout mortar and accelerating agent 35 on the exposed part of the segment 33 from the injection pipe 9 of an injection part 7 provided on the upper part of the shield machine 1. By the construction the lining segment 33 can be protected, and a tunnel exposed partially from the face of the water bottom 39 can be constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shield machine, a tunnel construction method, and a tunnel.

[0002]

2. Description of the Related Art Conventionally, in the construction of shield tunnels under water, road tunnels, railway tunnels, etc.
When part of the upper surface of the shield tunnel is exposed from the water bottom due to restrictions such as the gradient of the tunnel, to maintain the stability of the tunnel face and the water bottom, fill the water bottom or make the tunnel itself deeper as a whole. Have been dealt with.

[0003]

However, in this case,
There is a problem that an extra process of filling the water bottom is required, and that a deep place must be dug.

[0004] The present invention has been made in view of such problems, and an object of the present invention is to provide a shield machine and a tunnel capable of maintaining the stability of a shield tunnel simultaneously with excavation of the shield in a shield tunnel partially exposed to the water bottom. To provide a construction method and a tunnel.

[0005]

According to a first aspect of the present invention, there is provided an injection part for discharging an injection material to the outside, and the injection part is formed on a segment constructed as the digging proceeds. This is a shield machine characterized by covering with materials.

A second invention is a tunnel construction method characterized in that a tunnel is constructed using the shield machine according to the first invention while covering an injection material on a segment. A third invention is a tunnel constructed by the tunnel construction method according to the second invention.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view including a partial cross section of the shield machine 1, and FIG. 2 is a view of the shield machine 1 in FIG. As shown in FIGS. 1 and 2, the shield machine 1 includes an injection section 7 at an upper portion. Injection part 7
Has an injection pipe 9 for covering the upper part of the segment with mortar, and a pipe cleaning jack 11 for cleaning the inside of the injection pipe 9.

A pipe 10 for supplying mortar to an injection pipe 9 is provided inside the shield machine 1. The mortar to be injected into the pipe 10 is a non-separable mortar in water, and a quick-setting material such as water glass is mixed in the middle of the pipe to quickly cover the upper surface of the segment. In addition, 3 is a shield jack, 5
Indicates a ring gutter, and 13 indicates a tail seal.

FIG. 3 is a side view of the vessel 21, and FIG. 4 is a front view of the vessel 21. As shown in FIGS. 3 and 4, the vessel 21 travels in a tunnel and transports the mortar to the shield machine 1. The vessel 21 includes a mortar storage unit 27 for storing mortar and a mortar pump 25 for supplying mortar, and runs in a tunnel with wheels 23.

Then, the mortar is fed into the pipe 10 using the mortar pump 25 in the shield machine 1.

Next, a procedure for constructing a tunnel by the shield machine 1 will be described. FIG. 5 is a sectional view of a tunnel constructed by the shield machine 1, and FIG. 6 is a sectional view taken along line XX of FIG. As shown in FIGS. 5 and 6, the shield machine 1 constructs the segment 33 while excavating the ground in a state where the shield machine 1 is partially exposed from the water bottom 39, and at the same time, the injection unit 7 provided at the upper part of the shield machine 1. Mortar and quick-setting material 35 from the injection pipe 9
3 while moving forward. 31 is the water surface, 37
Indicates a backing material. Underwater mortar and quick-setting material 3
5 is discharged outside from the injection part 7 and solidifies rapidly on the segment 33.

As described above, by constructing the segment 33 by the shield machine 1 and simultaneously placing the underwater inseparable mortar and the quick-setting material 35 on the exposed portion of the segment 33,
The lining segment 33 can be protected, and the water bottom 3
A tunnel partially exposed from nine surfaces can be constructed.

The present invention is not limited to the embodiment described above. For example, the number of the injection pipes 9 may be other than that shown in FIG. 2, or the injection part 7 may be made slightly larger so that the mortar is covered around the side of the tunnel. Further, a material other than water glass may be used as the quick setting material.

[0014]

As described in detail above, according to the present invention, in a shield tunnel partially exposed at the water bottom,
A shield machine, a tunnel construction method, and a tunnel capable of maintaining the stability of a shield tunnel simultaneously with excavation of a shield can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a shield machine 1 including a partial cross section.

FIG. 2 is a view of the shield machine 1 in FIG.

FIG. 3 is a side view of the vessel 21.

FIG. 4 is a front view of the vessel 21.

FIG. 5 is a sectional view of a tunnel by the shield machine 1.

6 is a sectional view taken along line XX of FIG. 5;

[Explanation of symbols]

 1 Shielding machine 7 Injection section 9 Injection pipe 11 Pipe cleaning jack 33 Segment 35 Inseparable mortar in water + quick-setting material

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ishimaru 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch F term (reference) 2D054 AC16 AD22 2D055 BA01 BA07 BB01 JA03

Claims (6)

[Claims] 1. A shield machine having an injection portion for discharging an injection material to the outside, and covering the injection material on a segment constructed as the digging proceeds. 2. The shield machine according to claim 1, wherein the injection section has an injection pipe therein and a cleaning jack for cleaning the inside of the injection pipe. 3. The shield machine according to claim 1, wherein the injection material is mortar. 4. The shield machine according to claim 1, wherein the injection material is obtained by mixing a quick-setting material into a non-separable mortar in water. 5. A tunnel construction method using the shield machine according to claim 1 to construct a tunnel while covering an injection material on a segment. 6. A tunnel constructed by the tunnel construction method according to claim 5.