JPH09125468A - Underground structure for water reservoir - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a compact space and increase the strength of an underground structure, by parallelly arranging two rows of box culverts and connecting the two rows of box culverts at the middle and butting each other at both ends and unifying them at the connection parts of the culvert with depth walls and further, fitting the bottom pit into a pit hole of a cast-in-place concrete foundation. SOLUTION: An underground structure is constituted of a box culvert 2 provided with the bottom pit arranged at one end thereof and a feeding hole, a T-shaped box culvert 1 with a projected part, a parallelepiped box culvert 3, and box culverts 4 with depth walls closing both ends, in a row. These two rows of box culverts are parallelly arranged and both respective ends are connected to butt the rigidly connecting protrusions of the culverts 4 with the depth walls. And further, the protrusions of T-shaped box culverts 1 are rigidly connected to butt each other at the middle part.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an underground structure for water storage, such as an underground water reservoir or a reservoir.

[0002]

2. Description of the Related Art A conventional underground structure for water storage including a box culvert with a pit is composed of one row of box culverts as shown in FIGS. 9 and 10.
Place at both ends of column 03. 1 in FIGS. 9 and 10
02 is a closed box culvert arranged at both ends.

However, when the box culverts are arranged in one row in this way, the length of the underground structure becomes long, a long and narrow space is required, and it may not be possible to construct the space in a narrow space.

[0004]

[PROBLEMS TO BE SOLVED] To construct an underground structure for water storage having sufficient strength and capacity in a place with insufficient space.

[0005]

Two box culvert rows including a box culvert 2 with a pit having a bottom pit 2b and a suction tube input hole 2a are arranged in parallel, and two box culvert rows are connected in the middle portion. An underground structure for water storage, in which both ends thereof are connected and fixed by the connecting projections 4a of the box culvert 4 with the back wall, and the bottom pits 2b are fitted into the pit holes b1 of the site casting foundation b.

[0006]

【The invention's effect】

(A) Since two underground box culvert rows are connected in parallel and communicate with each other to construct an underground structure, a compact space can be used.

[B] Two box culvert trains
In the middle part, the T-shaped box culvert 1 or the communication box culvert 5 communicates with each other to form a rigid connection and 2
Both ends of the row are rigid joint projections 4 of box culvert 4 with back wall
Since a and 4a are abutted against each other and rigidly connected, the two box culvert rows become an integrated structure, and sufficient strength can be secured. In addition, sufficient surface capacity can be secured. ▲ c ▼ T-shaped box culvert 1, 1 protrusion 1
When a and 1a are abutted against each other and rigidly connected and two box culvert rows are rigidly connected, the process can be simplified and sufficient rigidity can be secured.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION First, a first embodiment shown in FIGS. In the drawing, 1 is a T-shaped box culvert (Fig. 6), 1a is a protrusion thereof, 2 is a box culvert with a pit (Fig. 5), 2b is a bottom pit, 2
a has a suction tube charging hole.

3 is a rectangular parallelepiped box culvert forming a box culvert row (FIG. 7), 4 is a box culvert with a back wall that closes both ends of the box culvert row (FIG. 4), and 4a is its rigid connection projection. . b is a cast-in-place foundation, and b1 is a pit hole. (Figs. 1, 2)

The underground structure of the present invention has a pitted box culvert 2 arranged at one end and a protrusion 1a.
Shaped box culvert, rectangular box culvert 3
And a row is formed from the box culvert 4 with the back wall that closes both ends. The one row of box culverts thus constructed is arranged in parallel, and both ends of each row are rigid connection protrusions 4a, 4a of the box culvert 4 with the back wall.
Are urged and tightly bound.

At the intermediate portion, the protruding portions 1a, 1a of the T-shaped box culverts 1, 1 are butted against each other and rigidly connected. In the drawing, x is a sheath tube through which a PC steel material for rigid connection is inserted.

Thus, the underground structure of the present invention is an integrated structure in which two rows of box culvert rows are rigidly connected. Therefore, the underground structure can secure sufficient strength against earth pressure. In addition, in FIG. 1, s is a void generated between the communicating portion and the rigid connecting portions at both ends. Therefore, in the underground structure of the present invention, the double wall is formed by the inner wall of the box culvert row of each row on the central axis, and the strength of the structure is extremely high.

Next, a second embodiment of the present invention shown in FIG. 8 will be described. The first of the second embodiment shown in FIG.
The difference from the embodiment is that, in the middle part, a box culvert 5 for communication is used between the rectangular parallelepiped box culverts 3 and 3 without using a T-shaped box culvert and two box culvert rows are connected. Since the other structure is exactly the same as that of the first embodiment, its explanation is omitted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment,

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a cross-sectional view of FIG.

FIG. 4 is a perspective view of a box culvert 4 with a back wall,

FIG. 5 is a perspective view of a box culvert 2 with a pit,

FIG. 6 is a perspective view of a T-shaped box culvert 1.

FIG. 7 is a perspective view of a rectangular parallelepiped box culvert 3,

FIG. 8 is a perspective view of a second embodiment,

FIG. 9 is a perspective view of a conventional underground structure,

10 is a cross-sectional view of FIG. 9f10-f10,

[Explanation of symbols]

1: T-shaped box culvert, 1a: protruding portion, 2: pitted box culvert, 2a: suction tube input hole, 2
b: bottom pit, 3: rectangular box culvert, 4:
Closed box culvert, 4a: rigid connection protrusion, 5: communication box culvert, s: void, x: sheath tube, b: cast-in-place foundation.

Claims (3)

[Claims] 1. Two box culvert rows including a box culvert 2 with a pit having a bottom pit 2b and a suction tube input hole 2a are arranged in parallel, two box culvert rows are communicated with each other at an intermediate portion, and both ends thereof are connected to each other. The underground structure for water storage, in which the connecting projections 4a of the box culvert 4 with the back wall are butted and fixed together, and the bottom pit 2b is fitted in the pit hole b1 of the site-casting foundation b. 2. The underground structure according to claim 1, wherein two rows of box culverts are connected by connecting the protruding portions 1a, 1a of the T-shaped box culverts 1 to each other by solidifying them. 3. The underground structure according to claim 1, wherein two box culvert rows are connected by interposing a connecting box culvert 5.