Influence Of Crush Sidewall To The Stress And Deformation Of Gongboxia Concrete Face Rockfill Dam

With the concrete face rockfill dam applied widely, its construction technics is being improved continually. Among them, the crush sidewall technics is one new method of cushion construction of face rockfill dam. This method can guarantee the quality of cushion compaction and improve the protective capability of slope face as well as its construction is simple and so on , so it got more recognition for the international dam world and it has become one kind of new experience. But it also has very many new questions to study deeply. This new method is used in Gongboxia concrete face rockfill dam for the first time in our country.In order to consider the influence of crush sidewall to the stress and deformation of Gongboxia concrete face rockfill dam, this article analyzed the redevelopment function of ABAQUS firstly, and studied the principle and the process of the user material subroutine (UMAT), and programmed the construction model procedure of Duncan - Chang E-B and inducted it to ABAQUS, and used the results of triaxial test to confirm the accuracy of the procedure. The results proved that the procedure is successful. The procedure has many virtues such as high efficiency, high accuracy, simple source code,convenient revision and so on.In order to simplify the computation and the analysis of crush sidewall, the model of this article used the equivalent board instead of crush sidewall and used the equivalent contact face instead of contact face between the wall and dam. This model parameters is obtained through shearing test and confirmed its validity.Based on the above research results, this article used the three dimensional static finite element analysis to the dam, and concluded the rule of stress and deformation of the dam, and discussed the influence of the asphalt coating to stress distribution of face slab, and thought the influence is not obvious.