Reusable stilling pool overhauling device and overhauling method

Abstract

The invention discloses a reusable stilling pool overhauling device and an overhauling method. The reusable stilling pool overhauling device comprises a stilling pool tail sill (1); the stilling pool tail sill (1) is connected with a concrete base (2); the concrete base (2) is hinged with one side of a moveable water block door (3); an air cushion storage tank (4) is arranged below the moveable water block door (3); an air cushion (5) is arranged in the air cushion storage tank (4); and the air cushion (5) is connected with a control chamber (7) through an air cushion control pipe (6). The reusable stilling pool overhauling device has the characteristics of reusability, time saving and labor saving, overhaul flexibility, convenience for obtaining stilling pool overhauling conditions and low cost.

Description

technical field [0001] The invention belongs to the technical field of hydraulic energy dissipation in the water conservancy and hydropower industry, in particular to a reusable stilling pool maintenance device and maintenance method. Background technique [0002] In the downstream energy dissipation design of the control section of water conservancy and hydropower projects, the stilling basin structure is widely used. The stilling pool is affected by hydraulic erosion, sediment wear and other adverse effects, and structural damage often occurs. Affected by the fact that the downstream water level is higher than the structural elevation of the stilling basin, it is difficult to obtain the maintenance of the stilling basin in dry land construction conditions. If the underwater repair scheme is adopted, the repair quality is poor due to factors such as poor construction environment and difficulty in cementing the repair materials with the original structure. [0003] The pri...

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Problems solved by technology

[0004] The maintenance technology of caisson (or caisson) is complicated, the construction risk is high, the construction period is long, and it is not suitable for surface maintenance

On the basis of satisfying the energy dissipation of the deep water pad, the high tail sill scheme of the stilling pool often makes the tail sill structure large

Especially when the downstream normal dry water level is high, the stilling pool high tail sill scheme not only requires a large engineering investment, but also the hydraulic outflow conditions do not meet the protection requirements of both banks

The downstream construction of temporary cofferdams is time-consuming and labor-intensive, cannot be reused, and has poor economic applicability

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