Soil-core wall dam preventing hydraulic fracture

Abstract

The invention discloses a soil-core wall dam preventing hydraulic fracture. The soil-core wall dam comprises an upstream dam body, a core wall and a downstream dam body; upstream soil bags and downstream soil bags are correspondingly stacked on both sides of upstream and downstream parts of the core wall arranged on the soil-core wall dam in a staggering mode, and the outer sides of the upstream soil bags and the downstream soil bags are filled with upstream dam shell materials and downstream dam shell materials. Soil materials in the upstream soil bags and the downstream soil bags arethe sameas that in the core wall, the stacking width is between 2.0 m and 2.5 m, and the height is at least 1 m higher than a check flood level. According to the soil-core wall dam, the upstream soil bags and the downstream soil bags are used for wrapping the core wall, lateral displacement of the core wall is limited, and occurrence of hydraulic fracture is effectively avoided; and flexible soil bags made of the same soil materials can keep the same vertical deformation with the core wall to ensure safe operation of the dam.

Description

technical field [0001] The invention relates to an earth core wall dam, in particular to an earth core wall dam which prevents hydraulic splitting. [0002] technical background [0003] For soil core wall dams under the action of high water head, due to the different deformation moduli of the dam body and the anti-seepage body, under the action of self-weight and water pressure, the anti-seepage body is prone to produce an arch effect, which reduces the tensile strength of the soil anti-seepage body , when the water pressure of the upstream reservoir is greater than the minimum principal stress of the upstream surface of the soil anti-seepage body, hydraulic splitting of the soil anti-seepage body may occur, causing cracks in the soil anti-seepage body, and then leakage occurs, affecting the operation safety of the dam . The main reason is that the lateral deformation capacity of soil anti-seepage body is small. Therefore, increasing the Poisson's ratio of soil anti-seepag...

AI Technical Summary

Problems solved by technology

[0003] For soil core wall dams under the action of high water head, due to the different deformation moduli of the dam body and the anti-seepage body, under the action of self-weight and water pressure, the anti-seepage body is prone to produce an arch effect, which reduces the tensile strength of the soil anti-seepage body , when the water pressure of the upstream reservoir is greater than the minimum principal stress of the upstream surface of the soil anti-seepage body, hydraulic splitting of the soil anti-seepage body may occur, causing cracks in the soil anti-seepage body, and then leakage occurs, affecting the operation safety of the dam

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