Disposition And Research Of Remnant Strong-mantlerock Under The Foundation Of Dam

The security of dam program is very important in Hydraulic and Hydropower construction. The international experiences indicate that the dam construction depends on the foundation stability to a large degree. There are many instances and lessons that dam wrecking happened because of bad geological conditions of foundation. To ensure the well-balanced run of the dam, we should deal with different kinds of problems of the dam base.There are many kinds of problems of natural foundation, such as strong-mantlerock,weak-interlayer,faultage-belt,deep-hardpan and so on.Strong-mantlerock is a relatively popular case that foundation elasticity ,and stability decrease due to weathering. In this paper we will expand our discussion from the study and disposal of the rigidity dam foundation which is based on strong-mantlerock .The most serious problem of strong-mantlerock which remains on the rigidity dam is that the carrying capacity is not enough which will bring security hidden trouble during the run of the dam. The paper takes the disposal of foundation remains on the strong-mantlerock in Xiajiankou program for example, using 3-D nonlinear elastic-plastic finite element model to analyze the several working status of the foundation before and after the disposal.The paper mainly uses the method of 3-D nonlinear finite element and simulates the detailed situation of Xiajiankou program with ANSYS which is a large universal computer software. With the strong ability of background disposal, the displacement,stress and strain of foundation can be educed ,and then we can estimate the plastic yielded sections(destroied sections)of the foundation with...