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李家峡水电站左岸f35断层位于大坝轴线下游,贯穿河床及左、右岸于山体之中;其岩石产状为NW300-330°SW∠40-50°,岩石类型为压性及压扭性逆断层,破碎带主要以片状破碎岩、糜棱岩及少量灰白、灰绿或棕红色断层泥(厚0.2-3cm)顺层或局部切层分布。根据设计,经对f34断层分层(2087、2114、2135高程)采用平洞开挖、混凝土衬砌、回填灌浆及固结灌浆后,对其进行层间深层处理即高压固结灌浆,以期达到稳固效果,提高左岸坝肩的整体稳定。
The left bank f35 fault of Lijiaxia Hydropower Station is located downstream of the dam axis and runs through the riverbed and the left and right banks in the mountain. Its rock is NW300-330 ° SW∠40-50 °, and its rock type is compressive and compressive, Broken zone mainly in sheet crushed rock, mylonite and a small amount of gray, gray-green or red-brown fault mud (thickness 0.2-3cm) bedding or partial layer distribution. According to the design, after stratified by f34 (2087,2114,2135 elevation), flat-wall excavation, concrete lining, backfill grouting and consolidation grouting are carried out, and the stratified deep stratification is carried out, that is, high-pressure consolidation grouting in order to achieve a stable effect , To improve the overall stability of the left bank abutment.