High Steep Bank Slope Cfrd Stress-strain Analysis Of Elastic Boundary Model

In the conventional stress-strain analysis of finite element method (FEM), the boundary of concrete-faced rockfill dam (CFRD) is treated as complete constraint. So it can not calculate the deformation of the peripheral joint. With the action of the water pressure, the non-homogeneous deformation will emerge at the peripheral joint between the faceplate and the toe slab. Under the circumstances of the high steep bank slope, the non-homogeneous deformation can damage the water seal and cause serious leakage.The paper is emphasis on how to simulate the boundary condition of the enrockment near the high steep bank slope. Compared with the conventional analytic methods, the author studies the feasibility that the elastic bearing model is used to simulate the boundary constraint condition of the enrockment. Typical body of dam is chosen to study the stress-strain rule of the faceplate and the enrockment, especially the deformation rule of the peripheral joint. The range of the coefficient of elasticity (E.G.) can be affected by geometric parameters, which include the slope of bank, the water depth before dam, the height of dam, the width of runway, etc. The effect is discussed to determine the range of the E.G., and an optimal range of the E.G. is given to apply in actual engineering. The practicability of the elastic bearing model is verified by the example of Song Shan CFRD.