JP3471435B2 - Tunnel wall - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of dividing an internal space into a plurality of partitions by partition walls, and installing a common utility facility or the like in each of the divided spaces. It concerns the applicable tunnel wall. 2. Description of the Related Art As is well known, in a tunnel in which a plurality of facilities are laid, an internal space may be divided into a plurality of sections by partition walls, and each facility may be laid in the divided space. For example, a common ditch 1 shown in FIG. 7 is one in which a plurality of public utilities buried underground are arranged in one tunnel, and have been widely used in recent years. The common groove 1 is formed by a primary lining wall 2, a secondary lining wall 3, and partition walls 4 and 5, and for example, each space 6, 7 and Inside 8, a water guide pipe (water supply pipe or sewer pipe) 9, an electric wire 10, a gas pipe 11, and a telephone cable 12 are arranged. [0003] In order to construct the above-mentioned common groove 1, first, a tunnel is formed by excavating underground, and segments made of reinforced concrete manufactured in advance in a factory or the like are carried into the tunnel, and these segments are put around the tunnel. The primary lining wall 2 is constructed by connecting in the direction and the axial direction. Thereafter, a reinforcing bar and a formwork are installed at the inner surface of the primary lining wall 2 and the positions where the partition walls 4 and 5 are to be formed, and concrete is poured into the formwork to form the secondary lining wall 3 and the partition wall. 4 and 5 are formed. [0004] In the above-mentioned tunnel wall, since the partition walls 4 and 5 are constructed together with the secondary lining wall 3 by cast-in-place, the concrete cast-in site can be used. There is a problem that the work becomes complicated, the construction period becomes longer, and the cost becomes higher. Therefore, in recent years, the partition walls 4, 5 have been precast concrete slabs (hereinafter, referred to as precast concrete slabs).
Slabs). However, since the partition walls 4 and 5 have a role of assisting the side wall against the earth pressure applied to the side wall of the common groove 1, the dimension of the slab can be made only slightly shorter than the width between the side walls. Not done. For this reason, when the slab is attached in the tunnel, there is a problem that it is difficult to transport the slab in the tunnel. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and in a tunnel construction site, a slab for constructing a partition wall in a tunnel can be easily transported, and a tunnel wall which is inexpensive in a short time. The purpose is to provide. According to a first aspect of the present invention, there is provided a tunnel wall, wherein a lining wall is formed along a digging surface in a tunnel in which an underground is digged, and between the opposing side wall portions of the lining wall. In a tunnel wall provided with partition walls vertically partitioning the inside of the tunnel, opposing side wall portions each extend in the axial direction of the tunnel and have a protruding wall portion as an upper surface receiving surface.
A groove-shaped concave portion having the upper surface as a receiving surface is formed. A slab constituting the partition wall is placed between the receiving surfaces of the protruding wall portions or the groove-shaped concave portions , and the shape of the slab is such that at least two corners on a diagonal line of a rectangular shape are missing. It is characterized by having. According to the present invention, a partition wall is constructed using a slab having at least two corners missing on a diagonal line of a rectangular shape. By using a slab of this shape,
The transfer of the slab in the tunnel becomes extremely easy without obstructing the function of one of the partition walls to assist the side wall against the earth pressure. An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the basic structure is the same as that of the above-described common groove 1 shown in FIG. 7, and the same portions are denoted by the same reference numerals, description thereof will be omitted, and different portions will be described. In FIGS. 1 and 2, the left and right side walls 13 and 14 of the primary lining wall 2 project toward the inside of the tunnel at intermediate positions in the vertical direction of the side walls 13 and 14.
In addition, projecting wall portions 15 and 16 extending in the axial direction of the tunnel are formed. On the protruding walls 15, 16, protruding portions 17, 18 protruding further inward of the tunnel are formed. On the upper surfaces of these protruding wall portions 15 and 16, concave portions 19 and 20 are formed in a region including the portions where the convex portions 17 and 18 are formed, and the upper surfaces of the concave portions 19 and 20 carry the slab 21 thereon. Receiving surfaces 15a, 16a for placing
It has become. In this case, the depth dimension of the concave portions 19 and 20 matches the thickness dimension of the slab 21 and
Is mounted, the upper surface of the slab 21 and the protruding wall 1
It is configured such that the upper surfaces of 5 and 16 are flush with each other. The shape of the side surfaces of the concave portions 19 and 20 substantially matches the outer shape of the slab 21, and the portion corresponding to the curved surface 21a has a shape corresponding to the curved surface 21a. The slab 21 is fitted into the recesses 19 and 20, and is placed on the receiving surfaces 15a and 16a. As shown in FIG. 4, a slab 21 is formed by welding three H-section steels 22a to 22c having the same dimensions and fusing two corners of the welded ones located on the same diagonal line. Are formed by laminating strip steel plates 23 and 23 on the melted surface of the base material 22 and welding them. As shown in the figure, the shape of the slab 21 is a shape in which two corners on a diagonal line of a rectangular shape are missing, and the missing portions are curved surfaces 21a, 21a. The length of the slab 21 in the length direction is such that the gap between the slab 21 and the side walls 13 and 14 is small when the slab 21 is placed on the receiving surfaces 15 a and 16 a of the protruding walls 15 and 16. Next, a method of constructing a tunnel wall will be described. First, a tunnel is formed by excavating underground, and a primary lining wall 2 shown in FIG. 1 is constructed along an excavated surface of the tunnel. Then, the slab 21 is carried into the primary lining wall 2. In this case, since the slab 21 has a shape in which two corner portions located on the same diagonal line are missing, the slab 21 is transported in the tunnel in a state of being inclined obliquely as shown by a two-dot chain line in the figure. After the slab 21 is transported to a predetermined position, the slab 21 is rotated in the direction of arrow P, so that the slab 21 is attached to the original position. Next, as shown in FIG. 2, the protruding walls 15 and 16 are fitted into recesses 19 and 20 formed on the upper surfaces of the protruding walls 15 and 16, respectively.
By repeating this, slabs are set at intervals determined sequentially over the entire tunnel. Thereafter, as the work on site, the walls 26 are constructed of reinforced concrete above and below the secondary lining wall 3 and the slab. According to the above-mentioned tunnel wall, the side wall portion 13,
Since the gap between the slab 21 and the projecting wall portions 15 and 16 is small, the slab 21 is transported in the tunnel without obstructing one of the partition walls, which assists the side wall against earth pressure. Becomes extremely easy. Therefore, the slab 21 can be efficiently installed. In addition, since the slab 21 is manufactured in advance at the factory, the concrete driving work on site can be simplified, and the construction of the tunnel wall in a short time and at low cost becomes possible. In the above embodiment, only two opposing corners are missing, but a shape in which all four corners are missing may be used. Although the corners are cut off as a smooth curved surface, other shapes may be used as long as the corners are cut out so as to be rotatable in the tunnel. Further, in the present embodiment, the H-shaped steel and the strip-shaped steel plate are used to form the slab 21, but may be formed as an RC precast half slab. In the above embodiment, the protruding wall portion is provided on the side wall portion, and the upper surface thereof is used as the receiving surface. However, the receiving surface may have a structure as shown in FIGS. That is, groove-shaped concave portions 27 and 28 extending toward the axial direction of the tunnel are formed at a vertical intermediate position between the left and right side wall portions 13 and 14 of the primary lining wall 2, and these groove-shaped concave portions 27 and 28 are formed. The upper surfaces are the receiving surfaces 27a and 28a on which the slab 21 is placed.
In this case, the dimension between the groove-shaped concave portions 27 and 28 is
And the side wall portions 13 and 1 facing the side surface of the slab 21 when the slab 21 is placed.
The gap with 4 is very small. According to the present invention, the slab can be transported very easily in the tunnel by forming the slab into a shape in which at least two corners on the diagonal of the rectangular shape are missing. can do. Accordingly, the work of attaching the slab at the tunnel construction site can be performed efficiently, so that the tunnel wall can be constructed in a short period of time, and the common groove, which is a utility facility, can be provided at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing one embodiment of the present invention, and is a plan sectional view of a main part of a tunnel wall. FIG. 2 is a sectional view taken along line AA of FIG. 1; FIG. 3 is a sectional view taken along line BB of FIG. 1; FIG. 4 is a view showing one embodiment of the present invention, and is a perspective view showing a structure of a slab. FIG. 5 is a plan sectional view of a main part showing another configuration of the tunnel wall. FIG. 6 is a sectional view taken along line CC of FIG. 5; FIG. 7 is a longitudinal sectional view of a conventional tunnel wall. [Description of Signs] 13 Side wall portion 14 Side wall portion 15 Projecting wall portion 16 Projecting wall portion 21 Slab 27 Groove-like concave portion 28 Groove-like concave portion

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-233698 (JP, A) JP-A-8-60993 (JP, A) JP-A-1-315596 (JP, A) JP-A 8- 68146 (JP, A) JP-A-8-68147 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11/08

Claims (1)

(57) [Claims 1] A lining wall is formed along a digging surface in a tunnel excavated in the ground, and a vertical wall is formed in the tunnel between opposing side walls of the lining wall. In the tunnel wall provided with a partition wall for partitioning, the opposing side wall portions each extend in the axial direction of the tunnel and have a protruding wall portion serving as an upper surface receiving surface or a groove shape serving as an upper surface receiving surface. A concave portion is formed, and a slab constituting the partition wall is placed between receiving surfaces of the protruding wall portions or the groove-shaped concave portions , and the shape of the slab is at least two corner portions on a diagonal line of a rectangular shape. A tunnel wall characterized by a missing shape.