英布鲁水电站坝基软岩特性及关键工程地质问题

Dam Foundation Soft Rock Features and Key Engineering Geologic Problems of Imboulou Hydropower Station

坝基软弱砂岩、强透水性及其渗流稳定问题、当地筑坝材料的填筑特性是英布鲁水电站工程的三大关键地质问题。通过对砂岩物质组成、结构及其物理力学性质的研究,对其工程地质特性及岩体利用等问题有了系统深入的认识。正确认识软弱砂岩的水文地质特性,是解决坝基强透水性及其渗透破坏问题的关键。结合工程优化设计,对当地筑坝材料的质量特性进行了试验研究。

Poor sandstone foundation,strong permeability and seepage stability,and features of local embankment material are three key geologic problems of Imboulou Hydropower Station.The engineering geologic feature and rock mass utility are systematically recognized through study on sandstone composition,structure and its physical and mechanical properties.Correct understanding the hydrogeologic characteristics of weaksandstone is the key in solving the problems of strong permeability and seepage damage of dam foundation.In the text,the quality of localembankment materials is studied in combination of project optimization design.