JP3720782B2 - Dam spillway equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dam spillway facility that secures safety by increasing the discharge rate when a flood occurs.
[0002]
[Prior art]
As a spillway facility provided in the dam, as shown in FIG. 3, a gate 2 is installed at the top of the dam body 1, and a base end portion of an arm 4 extending downstream from the door body 3 of the gate 2 is rotated around a shaft 5. A door that is movably supported, lifts and lowers the door body 3 as the wire 6 is wound and unwound by an electric winch, and opens and closes the gate 2 is used.
[0003]
In such spillway equipment, when a flood occurs due to a typhoon or the like, when the door body 3 is raised and the gate 2 is opened, the upstream water overflows the dam body 1 and the upstream water level rises abnormally. Water damage can be prevented. Its discharge capacity is determined at the time of construction.
[0004]
[Problems to be solved by the invention]
By the way, after the construction of the dam, the environmental characteristics of the basin may change and it may be necessary to enhance the discharge capacity. In this case, since it is not easy to construct a new dam, it is conceivable to replace the gate of the spillway installed in the existing dam with a large one.
[0005]
However, in order to install a large gate, the peers and other facilities must be modified, and there is a problem that the gate is difficult to transport, requiring a great cost and a long construction period.
[0006]
Therefore, the present invention intends to install a dam spillway facility having a large discharge capacity at a low cost and in a short construction period by modifying an existing facility.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a dam spillway facility in which a gate is installed at the top of a dam body, the height of the existing dam body is lowered, a sub-gate is added below the existing gate, and the gate is opened and closed. By expanding the area, it was decided to increase the discharge capacity without replacing the existing gate with a large gate.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. This spillway facility is a modification of the conventional spillway facility shown in FIG.
[0009]
As shown in FIG. 1, at the time of this modification, first, the upper part of the existing dam body 1 is shaved, and the height of the dam body 1 is made lower than the conventional height indicated by the chain line.
[0010]
Next, the sub-gate 7 is added below the existing gate 2. Here, a four-way watertight flap gate in which the door body 8 is undulated by the hydraulic cylinder 10 with the shaft 9 as a fulcrum is adopted as the sub-gate 7.
[0011]
In the spillway equipment modified in this way, as shown in FIG. 2, when the existing gate 2 and the sub-gate 7 are opened, the open area becomes large, so that the discharge capacity at the time of flood occurrence is enhanced.
[0012]
In addition, it is not necessary to replace the existing gate 2 with a large one when remodeling, and the sub-gate 7 is a small one that can be easily transported and installed, so that construction can be performed at low cost and in a short construction period. The landscape will not change after construction.
[0013]
【The invention's effect】
As described above, the dam spillway equipment according to the present invention is installed by lowering the height of the existing dam body and adding a sub-gate below the existing gate, so it can be installed at low cost and in a short construction period. , Can have a large discharge capacity.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a gate closed state of a dam spillway equipment according to the present invention. FIG. 2 is a schematic view showing a gate open state of the dam spillway equipment. FIG. 3 is a schematic view showing a gate closed state of a conventional dam spillway equipment. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bank body 2 Existing gate 3 Door body 4 Arm 5 Axis 6 Wire 7 Subgate 8 Door body 9 Axis 10 Hydraulic cylinder

Claims (1)

A dam spillway with a dam spillway installed at the top of the dam body, the height of the existing dam body is lowered and a sub-gate is added below the existing gate.

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