三里坪大坝两岸工程地质特征差异分析

Geological feature differences analysis of two banks of Sanliping Hydropower Station

三里坪水电站大坝为建造在复杂构造背景下的碾压混凝土双曲拱坝,大坝两岸工程地质特征差异明显,主要表现为大坝左右两岸断层和裂隙的组合形式有明显差异,设计及施工中需针对大坝两岸差异性工程地质缺陷采取不同的应对方案。简要介绍了三里坪水电站复杂构造背景下的大坝工程地质特征,并据此对左岸底滑面和右岸侧滑面作了地质模型概化。分析结果给坝肩抗滑稳定计算提供了理论依据。

Sanliping Hydropower Station has a RCC arch dam built under complex tectonic setting,and the geological features of two banks have significant differences,mainly in the combination of faults and fissures.Different treatment measures should be adopted during construction aiming at the different geological defects.The geological features of the dam site under complex tectonic setting is introduced,and generalized geological model of bottom slide layer in left bank and lateral slide layer in right bank are given.The results provide a theoretical basis for the stability calculation of the dam abutment.