Reservoir, river, channel and waterlogging area exceed the storage capacity or bearing capacity of flood discharge and drainage, reservoir and channel safety protection or maintenance of water hydraulic structures. Discharge structure is an important hydraulic structure to ensure the safety of water conservancy projects and hydraulic structures and reduce flood disasters.
What are the drainage structures of water conservancy and hydropower?
Commonly used water conservancy and hydropower drainage structures are:
(1) Rolling dam, river sluice and sand sluice of low-head water control project;
(2) Overflow dams, spillways, spillways, culverts and tunnels of high-head water control projects;
(3) flood diversion gates and overflow dams;
(four) through the channel to flood or excess water into the sluice gate of the channel;
(five) the drainage gate and drainage pump station are used to discharge the accumulated water in the waterlogged area.
China has a long history of building drainage structures. It was recorded as early as the Spring and Autumn Period and the Warring States Period. With the continuous enrichment of practical experience and the continuous development of science and technology, the forms, structures, materials, energy dissipation and scour prevention, vibration resistance, foundation treatment, construction technology and other aspects of drainage structures in the world are progressing day by day, and the scale is also expanding. The maximum discharge capacity of drainage structures in Brazil Tukurui Project is 104400m? /s, the maximum discharge of Gezhouba water control project in China reaches 1 10000m? /s, the discharge per width of the spillway on the bank of Menggela Water Control Project in Pakistan reaches 290m? /(s*m) Ski spillway on the right bank of Dongjiang Hydropower Station in China adopts narrow slot energy dissipation, and the initial unit width flow of narrow slot contraction section is 15 1m? /(s*m), and the ending is 604m? /(s*m).
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