JPS61102908A - Steel cell dam - Google Patents

Abstract

PURPOSE:To reduce the cost of construction by a method in which hooped reinforcing bars are plurally set in parallel at given intervals into a columnar form, and steel cells formed by connecting steel sheet piles along the inner surface of the hooped reinforcing bars are connected soft-structurally with plural connecting bars. CONSTITUTION:Hooped reinforcing bars 7 are supported on the hook portion of right-angled clamps attached to struts 18 and set into a columnar form. Steel sheet piles 6 are temporarily positioned on the struts 18 of the bars 7, and the couplers 6a' of other steel sheet piles 6' are connected to the couplers 6a of the piles 6 along the inner surface of the hooped reinforcing bars 7 in a repeating manner. All the steel sheet piles 6 are fixed to the bars 7 by connecting wires to form a steel plate cell 3. Plural cells 3 are temporarily connected with connecting bolts 5 and a filler 22, e.g., soil and stone, is packed into the cells 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a dam used as a sand control dam or retaining wall built in mountainous areas.

[Indigenous technology and its problems]

Traditionally, when constructing a dam such as an erosion control dam, cobblestones and the like are packed into reinforcing cages and laid out as the main structure. 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 transportation of materials used for manufacturing.

It is still troublesome to deal with the undulations of the ground at the construction site, and it is also impossible to deal with changes in the undulation of the ground after construction, such as when the riverbed at the bottom of the dam is scoured by water flow, etc. Therefore, the purpose is to provide a dam that is easy to manufacture and inexpensive, is easy to transport, and can easily cope with the undulations of the construction ground and changes in the undulation of the ground after construction.

However, a dam is constructed by connecting a plurality of these steel cells.

The steel cell is made by arranging a plurality of hoop reinforcements in parallel at predetermined intervals and supporting them in a cylindrical shape, then connecting them along the inner peripheral surface of each hoop reinforcement, and then fixing a plurality of steel sheet piles in parallel. To manufacture.

Moreover, the connection of each steel sheet pile is performed by a connection bar 2 in a flexible structure.

The case where it is used in the erosion control dam 2 as shown (first embodiment) will be explained.

One dam, a plurality of steel cells 3, both bolt fixing parts 4 loosely installed on the connection end side in each steel cell 3, and each steel cell 3 when filling the filler into each steel cell 3. It consists of a plurality of connecting bolts 5 that connect the cells 3.

This steel cell 3 includes a plurality of steel sheet piles 6 and a plurality of steel sheet piles 6.
It consists of a plurality of hoop reinforcements 7, such as screw reinforcing bars, which fix the pipe into 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. (See FIG. 3) The bolt fixing portion 4 is a long member with a cross-section shaped like an ellipse, 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 the image preparation cell 3 and the through hole 9 of the bolt fixing part 4, the connecting bolt 5 is fixed with a bolt 10. It is fixed to part 4. Note that the connecting bolt 5 may be provided with threaded portions at both ends. (See 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 up 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 laid further downstream of the sunken bed 14.

When constructing an erosion control dam with such a configuration, first, the river bed 16 is excavated according to the cross-sectional shape of the river, and the flat part 1 is
7 will be provided. (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, in assembling the steel cell 3, first, a number of right angle clamps 19 are installed at predetermined intervals in the longitudinal direction of the column 18 at the supporting position of the 7-pipe reinforcement 7. Then, four of these struts 18 are set at positions on the diameter line orthogonal 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. (See Figure 5) After that, the hoop line 7 is attached to the hook part 19a of the right angle clamp 19.
The hoop muscles 7 are arranged side by side in a cylindrical shape. (6th
(See figure) Next, the steel sheet piles 6 are temporarily installed and positioned at the positions of the respective pillars 18 of the hoop reinforcements 7. Then, the process of inserting and connecting the new steel sheet pile 6' to the locking part 6a of the steel sheet pile 6 so as to lock the locking part 6a' of the steel sheet pile 6 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.

The connection of each steel cell 3 assembled in this way is as follows:
As shown in FIG. 4 described above, the steel cells 3 are temporarily connected with the connecting bolts 5.

Thereafter, the bolt fixing portion 4 is buried and fixed by filling the steel cell 3 with a filler material 22 of ordinary earth and stone. With this, each steel cell 3 is connected to the filler 22 by the connecting rod 5.
will be connected via. (See FIG. 2) The connection of each steel cell 3 is not limited to that of this embodiment, but may be of any type as long as it is made in a flexible structure using connecting rods.

Furthermore, the dam of this invention is not limited to erosion control dams as in the above-described embodiments, but has the effect of retaining walls and screen dams.

■ By forming steel cells with steel sheet piles that are fixed in parallel and connected in the width direction along the inner circumferential surface of hoop reinforcements that are arranged side by side in a cylindrical shape at predetermined intervals, steel cells can be easily assembled. And it 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 construction of the dam can be completed in a short time.

In addition, it can absorb changes in ground relief after construction, such as when the lower riverbed is scoured by water flow, as well as the impact and accumulation of earth and sand on each steel cell, reducing the possibility of damage to continuous walls. can.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and a plan view of an erosion control dam using the dam of this invention, Figure 3 is a diagonal 7-dimensional diagram showing the steel cells that are the main structure of the dam, and Figure 4 is A partially enlarged perspective view showing the connected state of each steel cell, Figures 5 to 7 are perspective views showing the assembled state of the steel cells, and Figure 8 is a perspective view showing the connected state of the steel sheet pile to the hoop reinforcement. It is. 1. Weir, 2. Sabo dam, 3. Steel cell 4. Bolt fixing part, 5. Connecting bar 6. Steel sheet pile, 7. Hoop reinforcement, 8. Through hole 9. Hole, 10...Natsuto, 11...Downstream 1112...Boulder,
13...H-shaped steel, 14...Sunk bed 15...Rebar cage, 16
・・River bed 17・・Flat area, 18・・Strut 19・・Right angle clamp, 20・・Iron wire 21・・Coupler joint, 22・・・Filling material. Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

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