JPH041810B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dam used as an erosion control dam or retaining wall built in mountainous areas or the like.

[Prior art and its problems]

Conventionally, when constructing a dam such as an erosion control dam, the main structure was to fill a reinforcing cage with cobblestones and the like and lay them out. However, as cobblestones have become more expensive in recent years, there has been a desire for a dam that is easy to manufacture and inexpensive, and also allows for easy transport of materials used for manufacturing.

In addition, it is troublesome to deal with the undulation of the ground at the construction site, and it is impossible to deal with changes in the undulation of the ground after construction, such as when the river bed at the bottom of the dam is scoured by water flow, etc. There were other problems.

This invention was devised in view of the above-mentioned circumstances, and its purpose is to make it easy to manufacture and inexpensive.
Another object of the present invention is to provide a dam that can be easily transported and that can easily cope with the undulations of the construction ground and changes in the undulations of the ground after construction.

[Means for solving problems]

According to this invention, the steel cells are the main component of the dam, and a plurality of these steel cells are connected to form the dam.

Steel cells are manufactured by arranging multiple hoop reinforcements in parallel at predetermined intervals and supporting them in a cylindrical shape, and then fixing multiple steel sheet piles in parallel while connecting them along the inner peripheral surface of each hoop reinforcement. do.

Moreover, the connection of each steel sheet pile is performed in a flexible structure using a connection bar.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments.

First, a case (first embodiment) in which the dam 1 of the present invention is used in an erosion control dam 2 as shown in FIGS. 1 and 2 will be described.

The dam 1 includes a plurality of steel cells 3 and each steel cell 3.
Both bolt fixing parts 4 are provided loosely on the connecting end side of the
and a plurality of connecting bolts 5 that connect each steel cell 3 when filling material is filled into each steel cell 3.

This steel cell 3 is made up of a plurality of steel sheet piles 6 and a plurality of hoop reinforcements 7 such as screw reinforcing bars that fix the plurality of steel sheet piles 6 in a pipe shape. A plurality of through holes 8 are bored at predetermined intervals in the longitudinal direction of the steel sheet pile 6 corresponding to the connecting end side. (See FIG. 3) The bolt fixing part 4 is a long member with an L-shaped cross section, and a plurality of through holes 9 are bored in the longitudinal direction at the same intervals as the through holes 8 of the steel sheet pile 6. As shown in FIG. 4, the connecting bolt 5 is made of threaded reinforcing bar, and after passing through the through hole 8 of both steel cells 3 and the through hole 9 of the bolt fixing part 4, tighten the bolt with a nut 10. It is fixed to the fixed part 4. The connecting bolt 5 is
It may be provided with threaded portions at both ends.
(Refer to Figure 4) When constructing the erosion control dam 2 using this dam 1, as shown in Figure 1, it is necessary to have one with a small diameter and height at both ends, and one with a small diameter and height in the center according to the cross-sectional shape of a river such as a mountain stream, as shown in Figure 1. Install items with large diameters and heights as appropriate.

Further, a sunken bed 14 made of boulders 12 and H-beams 13 to prevent floor digging is installed directly below the downstream side 11, and reinforcing bar cages 15 are placed further downstream of the sunken bed 14.

When constructing an erosion control dam having such a configuration, first, a flat portion 17 is provided by excavating the riverbed 16 in accordance with the cross-sectional shape of the river. (See FIG. 1) Next, each steel cell 3 is assembled and installed on this flat portion 17, and the steel cells 3 are connected with connecting bolts 5 to form the sabo dam 2.

Here, to assemble the steel cell 3, first, a plurality of right angle clamps 19 are provided at predetermined intervals at the supporting position of the hoop muscle 7 in the longitudinal direction of the column 18. Then, four of the struts 18 are set at positions on the diameter line perpendicular to the hoop muscle 7 so that the hoop muscle 7 can be supported by the hook portion 19a of the right angle clamp 19. (5th
(See figure) After that, the hoop muscles 7 are supported by the hook portion 19a of the right angle clamp 19, and the hoop muscles 7 are arranged in parallel in a cylindrical shape. (See FIG. 6) Next, steel sheet piles 6 are temporarily installed and positioned at the positions of each support column 18 of the hoop reinforcement 7. Then, the operation of inserting and connecting the locking part 6a' of a new steel sheet pile 6' to the locking part 6a of the steel sheet pile 6 so as to lock it was repeated sequentially along the inner circumferential surface of the hoop reinforcement 19. After that, as shown in FIG. 7, all the steel sheet piles 6 are fixed to the hoop reinforcements 7 with iron wires 20 to form the steel cells 3. (See FIG. 7) The hoop reinforcement 7 is made by bending a long threaded reinforcing steel into a circular shape, and connecting the abutting ends with a coupler joint 21.

To connect the steel cells 3 assembled in this way, the steel cells 3 are temporarily connected using the connection bolts 5 as shown in FIG. 4 described above.

After this, the filling material 22 of general earth and stone is added to the steel cell 3.
By filling the inside, the bolt fixing part 4 is embedded and fixed. As a result, each steel cell 3 is connected to the connecting rod 5 via the filler 22. (See FIG. 2) The connection of the steel cells 3 is not limited to that of this embodiment, but may be of any type as long as it is a flexible structure using connection bars.

Furthermore, the dam of this invention can be used not only for erosion control dams as in the above-mentioned embodiments, but also for retaining walls, screen dams, and the like.

〔Effect of the invention〕

The present invention has the above configuration and has the following effects.

By forming steel cells with steel sheet piles that are fixed in parallel and connected in the width direction along the inner peripheral surface of hoop reinforcements that are arranged in parallel in a cylindrical shape at predetermined intervals, steel cells can be easily and easily assembled. Can be assembled in a short time.

Therefore, it is possible to transport the hoop bars and steel sheet piles while being separated and assemble them at the construction site, and also to use commonly used steel sheet piles, making it possible to manufacture steel cells at low cost. This makes it possible to easily and inexpensively construct a dam whose main structure is a steel cell in a mountainous region or the like.

By connecting each steel cell using a plurality of connecting rods and using a flexible structure, changes in the position of each steel cell after connection can be absorbed.

Furthermore, during construction, it is possible to easily deal with the undulations of the ground on which the dam is being constructed, and the dam can be constructed in a short time.

Furthermore, it can absorb changes in ground undulations after construction, such as when the lower river bed is scoured by water flow, and the impact and accumulation of earth and sand on each steel cell, reducing damage to continuous walls. .

[Brief explanation of drawings]

Figures 1 and 2 are front and plan views showing an erosion control dam using the dam of this invention, Figure 3 is a perspective view of the steel cells that are the main structure of the dam, and Figure 4 shows each steel cell. FIGS. 5 to 7 are perspective views showing the assembled state of the steel cells, and FIG. 8 is a perspective view showing the state of the steel sheet piles being connected to the hoop reinforcements. . 1...Weir, 2...Ebo dam, 3...Steel cell, 4...
Bolt fixing part, 5... Connection bar material, 6... Steel sheet pile, 7...
Hoop muscle, 8...through hole, 9...through hole, 10...nut,
11...Downstream side, 12...Boulder, 13...H-shaped steel, 14
...Sunk bed, 15...Rebar cage, 16...River bed, 17...Flat area, 18...Column, 19...Right angle clamp, 20...
Iron wire, 21... coupler joint, 22... filler.

Claims (1)

[Claims] 1. A steel cell consisting of a plurality of hoop bars arranged side by side at predetermined intervals so as to form a cylindrical shape, and a plurality of steel sheet piles arranged and fixed in parallel while connecting in the width direction along the inner peripheral surface of each hoop bar, A dam made of steel cells, characterized in that a plurality of steel cells are connected to each other in a flexible structure by a plurality of connecting rods.