FEM ANALYSIS OF DAM STABILITY AFFECTED BY WATER LEVEL CHANGE AND GEOGRID
Pore water pressure redistributed when water level change that influence the stability of dam. Technique of reinforced soil has been widely used in dam engineering, the mechanism of its development for stability of dam should be lucubrated. Combined with project example, the paper use shear strength reduction method based on FEM theory,from aspects of the water level change magnitude and velocity, behaviors of geogrid:stiffness, layout span, interface behavior between soil and geogrid, calculate the safety factor of dam on soft soil foundation and the latent failure surface location. By calculation can get conclusions as follow. Water level increases and descends lead to the decline of dams stability, latent failure surface inside or outside the dam depend on the water level lift up or descend. The latent failure surface exists at the outside of dam when water level risen, or at the inner of dam when water level descend. When the water level changes fast,due to the lag of the pore water pressure redistribution, stabiIity of dam descend. By using geogrid can increase the stability of dam in general, the development of stability varies with the geogrids layout manner, stiffness of geogrid. Lack or excessive of geogrid all lead to the inefficacy for development of dam stability. Coarse grain dam filling material have the well interface behavior between soil and geogrid, can develop the stability of dam apparently.
Soft Soil Foundation Reinforced Soil Stability of Dam FEM Shear Strength Reduction Method (SSR)
JUNLING REN PENG LV HAI DENG GUOAN WANG
Logistics Group,Shijiazhuang Railway Institute,Shijiazhuang,Hebei Province,050043,China College of Construction Engineering, Shijiazhuang Railway Institute,Shijiazhuang,Hebei Proving,05004
国际会议
第三届中日岩土工程研讨会(Proceedings of the 3rd Sino-Japan Geotechnical Symposium)
重庆
英文
466-470
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）