Influences of Foundation Deformation Modulus to Stress Distribution of Roller Compacted Concrete Arch Dam

With Yujianhe hydraulic engineering as the background and on the basis of geological module and boundary conditions of Liding dam, a 3-D mathematic and mechanical module was constructed to study the influence of different deformation modules on stress distribution by ANSYS software.The result indicates: (1) The maximum principal stresses are chiefly distributed at the bottom of the dam and close to weak intercalated layers; (2) The deformation module of weak intercalated layers affects the stresses of abutment and crown of the arch, and when it is less than 0.5 GPa, the differences of stresses are obvious; (3) When the foundation is composed of three materials, the maximum tensile and compressive stresses exist about 10-15 m to the top of the weak intercalated layers rather than at the top of them.This conclusion provides a theoretical basis for the optimal design for arch dam and dam treatment.