JP2000213292A - Tunnel and its construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel and a tunnel construction method which reduces the sectional force generated in a tunnel lining, is economical, and effectively uses the dead space in the tunnel. SOLUTION: This tunnel is constructed by a shield machine (not illustrated in the figure), and a segment 5 is a primary lining. A truss 7 comprising a horizontal member 9, a perpendicular member 11 and a diagonal member 13 is installed in the tunnel and reinforced. The truss 7 is used as a temporary reinforcing member. A reinforcing bar is arranged inside the segment 5, a concrete is placed to provide a secondary lining 15, and the truss 7 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel construction method and a tunnel.

[0002]

2. Description of the Related Art Conventionally, when constructing a tunnel, a tunnel having a circular cross section in which a sectional force generated in tunnel lining is not biased has been often used. However, by lining the tunnel with an elliptical shape or a horseshoe shape, it may be possible to effectively use the underground.

[0003]

However, when the tunnel is constructed with an elliptical or horseshoe-shaped cross section, the cross-sectional force is large, and therefore the segment weight is large. For this reason, there arises a problem that a load at the time of carrying in the segment from the manufacturing place to the construction site increases, and a load also increases on the segment assembling erector of the shield machine.

[0004] The present invention has been made in view of the above problems, and an object thereof is to reduce the sectional force generated in tunnel lining, to be economical, and to reduce dead space in a tunnel. An object of the present invention is to provide a tunnel construction method and a tunnel that can be used.

[0005]

In order to achieve the above-mentioned object, a first aspect of the present invention is to provide a step of constructing a primary lining of a tunnel, and a method of forming a primary lining from a horizontal member and a vertical member. A reinforcing member comprising a horizontal member, a vertical member, and a diagonal member; a step of applying a secondary lining to the surface of the primary lining; and a step of removing the reinforcing member. This is a tunnel construction method characterized by the following.

A second invention is a tunnel constructed by the above-described tunnel construction method.

A third aspect of the present invention is a step of constructing a primary lining of a tunnel, and a reinforcing member comprising a horizontal member and a vertical member, or a horizontal member, a vertical member, and a diagonal member for the primary lining. And a step of arranging a reinforcing member comprising the reinforcing member, wherein the reinforcing member is used as a permanent member.

According to a fourth aspect of the present invention, there is provided a tunnel constructed by the tunnel constructing method.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 to FIG. 5 are explanatory views of a tunnel construction method using a reinforcing material by a temporary truss according to the first embodiment.

In FIGS. 1 and 2, the tunnel 1 is constructed by a shield machine (not shown). 3 is the ground. Segment 5 is a primary lining. FIG. 2 is a side view of FIG.

Next, as shown in FIG. 3, a truss 7 composed of a horizontal member 9, a vertical member 11, and a diagonal member 13 is installed in the tunnel 1 and reinforced. The truss 7 is used as a temporary reinforcing material. FIG. 4 is a diagram showing the secondary lining 15 in the tunnel 1. Reinforcing bars are arranged inside the segments 5, concrete is cast, and a secondary lining 15 is provided. FIG. 5 is a diagram showing the tunnel 1 after the truss 7 has been removed.

FIG. 6 shows the bending moment generated in the tunnel when the truss 7 is not provided, and FIG.
This shows the bending moment when.

As described above, by reinforcing the tunnel 1 at the time of the primary lining by the truss 7, the bending moment in the tunnel 1 can be reduced. From this, the weight of the primary lining of the tunnel 1 can be reduced, that is, the weight of the segment 5 can be reduced, and the restriction, cost reduction, and shielding machine at the time of carrying the segment 5 from the manufacturing place to the construction site can be achieved. Can reduce the burden on the erector.

In addition, since the truss is reinforced, it is possible to place the tunnel 1 in various positions without losing the required space.
It is possible to reinforce the lining, and after the reinforcement is removed by the truss 7, an unrestricted space is obtained in the tunnel 1. Furthermore, the truss 7 can also be used as a flat temporary scaffold necessary for work in the tunnel, carrying in and out.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 8 is a diagram illustrating a method for constructing a tunnel using a temporary horizontal member and a vertical reinforcing member according to the second embodiment.

As shown in FIG. 8, the second embodiment is an example in which the reinforcing member using the truss in the first embodiment shown in FIGS. 1 to 7 is changed to a reinforcing member using a horizontal member and a vertical member. . In FIG. 8, reference numeral 21 denotes a tunnel, 23 denotes a segment, and a horizontal member 25 and a vertical member 27 constitute a reinforcing member 29. The construction process of the tunnel 21 is the same as that of the first embodiment.

FIG. 9 shows the bending moment in the second embodiment, and this embodiment has the same effect as the first embodiment.

Next, a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 10 is a diagram illustrating a method of constructing a tunnel using a reinforcing member by a truss that is a permanent member according to the third embodiment.

In FIG. 10, 31 is a tunnel and 33 is a segment. Horizontal material 3 inside segment 33
9. A truss 37 composed of a vertical member 41 and a diagonal member 43 is installed to reinforce the tunnel lining by the segments 33. The truss 37 is used as a permanent member. Thereafter, if necessary, a secondary lining of a fireproof level may be performed. FIG.
13 shows a bending moment in the third embodiment.

Thus, the tunnel 3 by the truss 37
By performing the reinforcement of (1), the bending moment and the like in the tunnel 31 can be reduced. This makes it possible to reduce the weight of the segment 33 of the tunnel 31, thereby reducing restrictions on the transportation of the segment 33 from the manufacturing place to the construction site, reducing costs, and reducing the burden on the erector of the shield machine.

Since the truss is reinforced, it is possible to reinforce the lining at various positions without breaking the required inner space of the tunnel 31, and if it is a road tunnel, it can be adapted to the road surface. It is also possible to install the truss 37 at a position where the truss is located.

The present invention is not limited to the above embodiments, but can be applied to various tunnels having a horseshoe-shaped or elliptical cross section. The type of tunnel can be applied to a tunnel constructed by a shield method, a TBM method, or the like.

[0023]

As described above in detail, according to the present invention, the construction of a tunnel which can reduce the sectional force generated in the tunnel lining, is economical, and can effectively utilize the dead space in the tunnel. Methods and tunnels can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a method for constructing a tunnel 1 according to a first embodiment.

FIG. 2 is a diagram showing a method for constructing a tunnel 1 according to the first embodiment.

FIG. 3 is a diagram showing a method for constructing the tunnel 1 according to the first embodiment;

FIG. 4 is a diagram showing a method for constructing the tunnel 1 according to the first embodiment;

FIG. 5 is a diagram showing a method for constructing the tunnel 1 according to the first embodiment;

Fig. 6 Bending moment diagram of tunnel

FIG. 7 is a bending moment diagram of the tunnel 1 according to the first embodiment.

FIG. 8 is a diagram showing a method of constructing a tunnel 21 according to the second embodiment.

FIG. 9 is a bending moment diagram of a tunnel 21 according to the second embodiment.

FIG. 10 is a diagram showing a method of constructing a tunnel 31 according to a third embodiment.

FIG. 11 is a bending moment diagram of a tunnel 31 according to a third embodiment.

[Explanation of symbols]

 1,21,31 Tunnel 3 Chiyama 5,23,33 Segment 7,37 Truss 9,25,39 Horizontal material 11,27,41 Vertical Lumber 13, 43 ...... Diagonal 15 ...... Secondary lining

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Nakao 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Toshiyuki Sano 3--15 Awaza, Nishi-ku, Osaka-shi, Osaka No. Kashima Construction Co., Ltd. Kansai Branch F term (reference) 2D055 BA01 BB02 BB05 CA01 CA03

Claims (5)

[Claims] 1. A step of constructing a primary lining of a tunnel;
Arranging a reinforcing member composed of a horizontal member and a vertical member, or a reinforcing member composed of a horizontal member, a vertical member, and a diagonal member with respect to the primary lining; A method for constructing a tunnel, comprising: a step of constructing a work; and a step of removing the reinforcing material. 2. A tunnel constructed by the tunnel construction method according to claim 1. 3. A step of constructing a primary lining of the tunnel;
Disposing a reinforcing member composed of a horizontal member and a vertical member, or a reinforcing member composed of a horizontal member, a vertical member, and a diagonal member with respect to the primary lining; A tunnel construction method characterized by being used as a tunnel. 4. The method according to claim 3, wherein a secondary lining is applied to a surface of the primary lining. 5. A tunnel constructed by the tunnel construction method according to claim 3.