Sinking type dam-passing fishway structure

Abstract

The invention relates to a sinking type dam-passing fishway structure. According to the technical scheme, the sinking type dam-passing fishway structure is provided with a fishway pool chamber arranged in a dam body and is characterized in that an opening and closing machine room is arranged in the dam body and above the fishway pool chamber, and an emergency gate is arranged in the position, corresponding to the opening and closing machine room, in the fishway pool chamber; and a bypass mechanism communicating with the upstream fishway pool chamber and the downstream fishway pool chamber of the emergency gate is arranged in the dam body, and a water supplementing mechanism capable of guiding dam body upstream water to a downstream inlet of the fishway pool chamber is arranged in the dam body. The sinking type dam-passing fishway structure is suitable for the technical field of hydraulic structure building.

Description

technical field [0001] The invention relates to a sunken dam crossing fishway structure. The utility model is applicable to the technical field of hydraulic structure construction. Background technique [0002] Building water-retaining structures on natural rivers will inevitably change the shape of the natural river, which will have a certain impact on the ecological environment of the river, resulting in difficulties in the reproduction of migratory fish or hindering the exchange of species, which will bring great harm to the survival and development of fish. In order to solve the above problems, it is usually necessary to arrange fishways. [0003] High dams are usually located in narrow valleys, with steep slopes on both sides. The fishway route usually goes from the downstream to the upstream through the two banks around the dam abutment or through the dam. The fishway crossing the dam can partially reduce the excavation volume of high and steep slopes and save investm...

AI Technical Summary

Problems solved by technology

[0005] At present, the emergency lock chamber is generally opened and closed by a winch at the top of the dam, and the opening and closing of the dam top will occupy a large space on the top of the dam, which is not conducive to the passage of the dam crest and the arrangement of dam crest equipment during the construction and operation periods. Shutdown causes complex equipment layout on the dam crest, affecting the overall appearance of the dam crest

In addition, after the fishway accident gate is closed, there will be high-level water accumulation in the upstream section of the fishway dam-crossing accident gate. When the accident gate needs to be restarted, if the accumulated water is directly discharged downstream through the accident gate, a sudden flood will submerge the downstream The condition of the fishway pond room, in severe cases, will turn out of the side wall of the fishway, causing harm to other buildings downstream

[0006] In actual operation, affected by the changes in the water level of the upstream reservoir and the water level of the downstream channel, the water depths of the fishway inlet and outlet are generally different. When the water depth of the downstream fishway inlet is greater than the water depth of the upstream fishway outlet, the fishway inlet position will appear. The water flow rate is low, which may make it difficult for fish to find the entrance of the fishway, which will affect the fish passing effect

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