Numerical Analysis Of Seepage In Rubber Dam And Discussio On Key Steps In Construction And Trial Operation

Rubber dam has the advantages of low cost,short construction period and superior material of dam body.And it is widely used in river regulation projects.Rubber dam foundation is generally located in the river bed cover.Dam foundation seepage stability is the key issues of rubber dam.In this paper,using finite element analysis method is to study a case of Yixianhe Rubber Dam Project in Huaxian County.The problem of seepage stability of dam foundation with seepage and vertical seepage prevention is analyzed emphatically.And the factors influencing the seepage stability of dam foundation are analyzed.Finally,the sensitivity analysis of the permeability coefficient of the dam foundation is carried out by using the anti-seepage of the horizontal bedding and plug-type cutoff wall.In addition,the influence of the permeability coefficient on the seepage of the dam foundation is discussed.The main results of this paper are as follows:(1)The influence of concrete bedding on the seepage of dam foundation is analyzed,and the changes of seepage law of different foundation length are discussed.(2)The variation law of the headline at the seepage prevention wall after setting the cutoff wall is analyzed,and the influence rule of the hanging cutoff wall and the closed cutoff wall is discussed.(3)The sensitivity of the permeability coefficient in each layer when using concrete cover and hanging cutoff wall has analyzing.(4)The rationality of the construction process and construction scheme of measurement,earthwork,concrete and water supply and embedding in construction are analyzing and discussing.