Water bank protecting structure for water inlet/ outlet of pumped storage power station and construction method

Abstract

The invention discloses a water bank protecting structure for a water inlet / outlet of a pumped storage power station and a construction method. The water bank protecting structure comprises an underwater riprap protecting slope positioned in a water level varying area, a protecting slope on the water, and an inclined way positioned on the top part of the protecting slope on the water, wherein the structure of the protecting slope on the water is that an inverted filtering geotextile, a sand gravel or broken stone cushion layer and a gabion protecting slope are sequentially arranged from inside to outside of the protecting slope on the water; a coarse sand cushion layer is arranged on the lower surface of the inverted filtering geotextile. With the adoption of the water bank protecting structure, a side slope of the water inlet / outlet of the pumped storage power station can be effectively protected, and meanwhile, the problems of rapid water level drawdown caused by frequent wave slapping and scouring and daily water-pumped power generation, and collapsing and spalling damage caused by freezing and melting in winter to the protecting slope can be effectively solved; the water bank protecting structure can fit the surrounding environment, and is economic, reasonable, and simple and convenient to construct.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a water bank protection structure and construction method for an inlet and outlet of a pumped storage power station. Background technique [0002] The slope near the inlet and outlet of the pumped storage power station in the northern part of my country is subject to multiple damages such as the impact of waves, the sudden drop in water level caused by daily pumping power generation, and the frost heaving in winter, which may easily cause the slope protection near the inlet and outlet to collapse and peel off. [0003] For the traditional inlet and outlet slopes, for new projects, if it is within the protection range of the cofferdam, the construction is more convenient because of the dry land construction conditions; There will be problems with dry land construction conditions. In this regard, the commonly used methods are underwater riprap,...

AI Technical Summary

Problems solved by technology

This type of slope is frequently washed by wave impact, water level drop and frost heave in winter, often due to filter quality defects or no filter material, the filter fails, so that the soil at the lower part is washed, resulting in Empty, the slope protection material loses its support and causes the slope to collapse, destroying the whole or part of the revetment; or because the thickness of the rigid slope protection and cushion (or filter) is less than the maximum depth of frozen soil in the local area, resulting in the occurrence of the retained soil Frost heaving causes the slope protection body to be damaged by expansion and cracking, and then washed by waves, causing the slope protection to collapse, peel off and damage

These damages need to be repaired frequently. Since the built projects are restricted by the daily operating conditions and the lack of construction roads, the repair work is relatively difficult and consumes a lot of manpower and material resources.

[0004] In addition, pumped-storage power stations are mostly located in scenic areas, and slope protection forms such as concrete or masonry are not only prone to the above problems, but also easy to form artificial traces and gray negative landscapes in the form of rigid "reinforced concrete forests", which are easy to contrast with the surrounding Incongruity between environment and landscape

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