Tail water channel structure used on covering layer foundation

Abstract

The invention provides a tail water channel structure used on a covering layer foundation. The tail water channel structure comprises a tail water outlet structure. A sand collection trough, an upwardinclining type gravity barricade and a tail water channel bottom plate are sequentially arranged on the downstream side of the tail water outlet structure in the downstream direction from the upstream portion to the downstream portion, and the sand collection trough, the upward inclining type gravity barricade and the tail water channel bottom plate are located on the covering layer foundation. The sand collection trough is arranged at the upstream end of the tail water channel structure, a tail bank is arranged at the downstream end of the tail water channel structure, deposition in a channel is effectively relieved, and the structural form is optimized; the upward inclining type gravity barricade is mixed in the tail water channel structure, and therefore stability of the covering layerfoundation is ensured; and meanwhile, key-walls are additionally arranged on the upstream side and the downstream side of the tail water channel bottom plate, so that the situation that the bottom plate slides along the inclining face of the covering layer foundation to be destroyed is avoided, damage of differential settlement to the tail water channel bottom plate, the civil engineering work amount and the construction difficulty are reduced, and the engineering benefits are obvious.

Description

technical field [0001] The invention relates to a tailrace structure used on the covering layer foundation, belongs to the technical field of hydropower and water conservancy projects, and is suitable for hydropower and water conservancy projects, hydropower station tailrace projects with deep riverbed covering layers and high sand content in rivers. Background technique [0002] In water conservancy and hydropower projects, the tailrace channel is arranged downstream of the tailwater outlet structure of the power plant, and is a water delivery structure that introduces the water flow after the hydroelectric generating unit generates power into the downstream river. The tailrace ditch is generally consistent with the water outlet width of the unit, and the axis is parallel to the river or obliquely to the downstream direction of the river. It requires smooth water flow to prevent siltation or erosion in the ditch, and at the same time strive to save engineering. [0003] Eng...

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a tailrace structure used on the overburden foundation, which solves the problem of sediment in the tailrace of the hydropower station on the overburden river bed Problems such as siltation, uneven settlement and destruction of the bottom plate

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