The dam of Three Gorges Project is a concrete gravity dam with the crest elevation of 185 m,the maximum height of 181 m and dam axis length of 2 309.5 m.The dam consists of spillway,powerhouse,non-over flow,ship-lift,...The dam of Three Gorges Project is a concrete gravity dam with the crest elevation of 185 m,the maximum height of 181 m and dam axis length of 2 309.5 m.The dam consists of spillway,powerhouse,non-over flow,ship-lift,temporary ship-lock,left diversion wall and longitudinal cofferdam blocks.Some key techniques relating to dam structure design are presented,including hydraulics of flood discharge structure,dam joint design,layout and structural type of penstock,deep anti-sliding stability of dam foundation,reconstruction of temporary ship-lock and closed drainage and pumping of dam foundation.展开更多
The rigid body limit equilibrium method （LEM） and the nonlinear finite element method （NFEM） are often used in the analysis of anti-sliding stability of gravity dam. But LEM cannot reflect the process of progressi...The rigid body limit equilibrium method （LEM） and the nonlinear finite element method （NFEM） are often used in the analysis of anti-sliding stability of gravity dam. But LEM cannot reflect the process of progressive instability and mechanical mecha- nism on failure for rock mass while NFEM is difficult to use to solve the displacement discontinuity of weak structural plane. Combining the research with Xiangjiaba Hydropower Station project, the analysis of anti-sliding stability for segment 12# of the dam has been carried out using interface stress element method （ISEM）. The results can reflect the most dangerous location, the scope and distribution of failure zone in weak structural plane, and present the process of progressive failure in dam foun- dation as well as the safety coefficient of possible sliding body. These achievements provide an important technical reference for dam foundation treatment measures. The computational results show that ISEM can naturally describe discontinuous de- formation of rock mass such as dislocation, openness and sliding. Besides, this method is characterized by good adaptability, convenient calculation and high compatibility, thus it is regarded as an effective way to make an analysis of anti-sliding stabil- ity of gravity dam展开更多
文摘The dam of Three Gorges Project is a concrete gravity dam with the crest elevation of 185 m,the maximum height of 181 m and dam axis length of 2 309.5 m.The dam consists of spillway,powerhouse,non-over flow,ship-lift,temporary ship-lock,left diversion wall and longitudinal cofferdam blocks.Some key techniques relating to dam structure design are presented,including hydraulics of flood discharge structure,dam joint design,layout and structural type of penstock,deep anti-sliding stability of dam foundation,reconstruction of temporary ship-lock and closed drainage and pumping of dam foundation.
基金supported by the National Natural Science Foundation of China (Grant Nos. 51179064, 11132003 and 10972072)the National Science and Technology Supporting Plan (Grant No. 2008BAB29B03)
文摘The rigid body limit equilibrium method （LEM） and the nonlinear finite element method （NFEM） are often used in the analysis of anti-sliding stability of gravity dam. But LEM cannot reflect the process of progressive instability and mechanical mecha- nism on failure for rock mass while NFEM is difficult to use to solve the displacement discontinuity of weak structural plane. Combining the research with Xiangjiaba Hydropower Station project, the analysis of anti-sliding stability for segment 12# of the dam has been carried out using interface stress element method （ISEM）. The results can reflect the most dangerous location, the scope and distribution of failure zone in weak structural plane, and present the process of progressive failure in dam foun- dation as well as the safety coefficient of possible sliding body. These achievements provide an important technical reference for dam foundation treatment measures. The computational results show that ISEM can naturally describe discontinuous de- formation of rock mass such as dislocation, openness and sliding. Besides, this method is characterized by good adaptability, convenient calculation and high compatibility, thus it is regarded as an effective way to make an analysis of anti-sliding stabil- ity of gravity dam
