Side wall air-mixing type X-type flaring pier
A technology of wide tail pier and side wall, applied in the field of water conservancy and hydropower engineering, can solve the problems of affecting the structural stability of the side wall, high construction cost, difficult construction, etc., saving project investment cost, simple construction, and avoiding cavitation damage. Effect
Inactive Publication Date: 2013-09-11
SICHUAN UNIV
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Problems solved by technology
However, using this method, on the one hand, the construction is difficult and the construction cost is high; on the other hand, it also affects the stability of the side wall structure
Method used
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Embodiment
[0026] This embodiment is based on the Ahai Sea Hydropower Station on the Lancang River in Yunnan Province. The maximum dam height of the hydropower station is 138m. It is one of the largest dam height projects in China using wide tail piers + stilling pools combined with energy dissipation. Total storage capacity 800 million m 3 , with a total installed capacity of 2000MW. The hub buildings are mainly composed of retaining dams, surface hole overflow dams, stilling pools, right bank underground powerhouses and other buildings. The overflow dam section is equipped with 5 surface holes for discharge, and the 5 surface holes are all X-shaped wide tail piers. The net width of each hole is 13m, and the size of the orifice is 13m×20m (width×height). The weir surface curve adopts the WES curve, and the weir crest elevation is 1484.00m.
[0027] In the model test, when the X-shaped wide-tailed pier 2 in the prior art is used, and the discharge water flow 5 passes through the lower p...
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The invention relates to a side wall air-mixing type X-type flaring pier and belongs to the technical field of hydraulic and hydro-power engineering. According to the flaring pier, a cut, close to one side of a side wall, of the lower portion of the X-type flaring pier is partially blocked, after discharged water flows through a blocked part of the cut of the lower portion of the X-type flaring pier, the flow water deflects, and an air duct is formed between the water flow and the side wall. Thus, air mixing can be performed, and cavitation erosion damage to the side wall is avoided. When the side wall air-mixing type X-type flaring pier is used in the hydraulic engineering, compared with an original X-type flaring pier, when the water flow is discharged, side air mixing can be performed with the air duct formed between the water flow and the air duct, and therefore the cavitation erosion damage to the side wall is avoided. The side wall air-mixing type X-type flaring pier is easy to achieve, easy to construct, capable of saving engineering investment cost, capable of meeting the requirement for air mixing and capable of achieving the function of reducing erosion.
Description
technical field [0001] The invention relates to an X-shaped wide-tailed pier in a water conservancy and hydropower project, in particular to an X-shaped wide-tailed pier of a side wall aeration type, and belongs to the technical field of water conservancy and hydropower projects. Background technique [0002] The wide tail pier is a kind of energy dissipator pioneered in my country. It thickens the tail of the pier of the drainage structure sharply, so that the water passing section shrinks, causing the water flow to produce a shrinking jet on the dam surface, changing the condition of the water flow into the pool, and increasing the water flow. The energy consumption before the water flows into the pool changes the original energy dissipation mechanism and process. [0003] There are many forms of wide-tail piers, such as rectangular wide-tail piers, Y-shaped wide-tail piers, X-shaped wide-tail piers, special-shaped wide-tail piers, top drop-flow wide-tail piers, T-shaped wi...
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Inventor 刘善均白瑞迪许唯临王韦曲景学张建民邓军田忠张法星谭乔木朱莉
Owner SICHUAN UNIV