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《Water Power》 2004-02
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Study on the crack mechanism of face slab of concrete face rockfill dam and its prevention measures

SUN Yi, YAN Qiaom WANG Yun-qing (Huhei Qingjiang Shuibuya Project Construction Company, Yichang Hubei 443002)  
In accordance with the actual stresses and deformation characteristics of face slabs of concrete face rockfill dam during construction period and impoundment period, this paper deeply discusses the crack mechanism of face slab. The analysis shows the drying shrinkage of concrete and temperature stresses are main factors of causing the early fine cracks of face slabs, and the shear crushing forces on face slab caused by the deformation of dam body, the dead-weight of face slab and the inverted water pressure during construction period are main factors of causing late cracks of face slab. In order to improve the stress conditions of face slab and increase its impervious capacity, this paper puts forward some crack prevention measures from the aspects of materials, structures and construction.
【CateGory Index】: TV641.4
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