Flood discharge and sand discharge hole arrangement structure of water pumping and storage reservoir project

By setting up silt-trapping dams and flood discharge tunnels in pumped storage reservoir projects, combined with construction drainage tunnels, the problems of high geological risks in underground sedimentation basins of high-head power stations and increased costs due to construction diversion structures have been solved, achieving more efficient silt protection and shortening the construction period.

CN224412467UActive Publication Date: 2026-06-26CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Patent Information

Application Number
CN202521389561.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-03
Publication Date
2026-06-26
Estimated Expiration
2035-07-03

AI Technical Summary

Technical Problem

Existing high-head hydropower stations have significant geological risks in their underground sedimentation basins and their sedimentation effect is not significant. Pumped storage power stations require additional buildings, have high costs, long construction periods, and are difficult to construct, and the bypass diversion tunnels will wear down the permanent structure.

Method used

In pumped storage reservoir projects, silt-blocking dams and flood discharge tunnels are set up. The silt-blocking dams are used to block water, and the flood discharge tunnels are used to discharge floodwater and sediment to the downstream of the main dam of the reservoir. The silt-blocking dam water conveyance tunnel is combined with the initial water storage and water replenishment during the operation period to form a dedicated reservoir area to avoid the impact of sediment. Construction drainage tunnels are arranged in the hub section to achieve multi-functional diversion.

Benefits of technology

It reduces geological risks, improves the effect of preventing sediment buildup, shortens the construction period, reduces project investment, and avoids wear and tear on permanent structures caused by bypass diversion tunnels, thus having good economic benefits and construction period advantages.

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Abstract

The utility model discloses a flood discharge and sand discharge hole arrangement structure of a water pumping and storage reservoir project and a construction diversion method, and belongs to the technical field of water conservancy and hydropower engineering. A flood discharge and sediment discharge hole arrangement structure of a sediment non-entering water pumping and storage reservoir project comprises a reservoir main dam and further comprises a sediment arrester and a flood discharge and sediment discharge hole, the sediment arrester is located on the upstream of the reservoir main dam, an inlet section of the flood discharge and sediment discharge hole is located on the upstream of the sediment arrester, a hole body section of the flood discharge and sediment discharge hole penetrates through a mountain, and an outlet section of the flood discharge and sediment discharge hole is located on the downstream of the reservoir main dam; the silt arrester is further provided with a silt arrester water conveying hole used for conveying water to the silt arrester and the reservoir area between the main dam of the reservoir. The silt arrester is arranged on the upstream to stop water, the flood and silt are discharged to the downstream of the main dam of the reservoir through the flood discharge and silt discharge hole, and the silt arrester water delivery hole is used for storing water in the initial stage and supplementing water in the operation period for the lower reservoir, so that the lower reservoir becomes a special reservoir, the silt influence is avoided, and a novel hub arrangement mode that silt does not enter the water pumping and storage power station reservoir is formed.
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