山西磨河水电站坝基工程地质问题研究

Study on Dam Foundation Project Geological Problems in Shanxi Mohe Hydropower Station

山西磨河水电站坝基地层多为第四系松散层,主要为混合土漂(卵)石,少量的粉土质砂和低液限粉土,结构松散,分选较差,力学强度低,透水性大。本文针对磨河水电站存在的坝基松散层渗漏、渗透变形、坝基基坑涌水、基岩渗漏和左右坝肩绕坝渗漏等问题,研究提出处理问题的措施和对策,对高山峡谷区坝基处理提供指导性建议。

Shanxi Mohe Hydropower Station dam foundation strata are mostly quaternary loose beds,which are mainly composed of mixed soil boulders （gravels）,a small amount of silty sand and silt with low liquid limit.The strata are characterized by loose structure,poor sorting,low mechanical strength and high water permeability.In the paper,solutions and countermeasures are proposed by studying aiming at problems in Mohe Hydropower Station,such as dam foundation seepage in loose beds,penetration deformation,dam foundation excavation gushing,bedrock leakage and leakage around the dam in left and right abutments.Guidance suggestions are provided aiming at dam foundation treatment in areas with mountains and canyons.