Research Of Concrete Cut-off Wall In Seepage Prevention Reinforcement Of Earth Dam

Earth dam is mainly constructed by earth and rock around the dam. Earth dam is the most old-line kind of dam and was used abroadly.In modern history,the construction technology of earth dam was developed after the 1950's and many high earth dam were built.But for some reasons,lots of earth dam have seepage problem.So,reinforcing these earth dam is very necessary for protecting the safety of people's life and property and developing economy and maintaining social stabilization.The kind of seepage prevention reinforcement of earth dam is very excessive , such as high-presure jeting gouting,concrete cut-off wall,geosynthetics and etc.Thereinto,concrete cut-off wall is very familiar.With developing quickly of cut-off wall technology ,concrete cut-off wall will be used more abroadly.The paper expouds mechanism of seepage damage,demonstrates the theory and menthod of seepage prevention reinforcement of earth dam, and illuminates advancement and reliability of concrete cut-off wall from design,construction,detection and reinforcement effection,for example the concrete cut-off wall of the dam in Longhekou reservoir.