湿化作用对粘土斜心墙坝应力变形影响

Effect of Humidification on Stress Deformation of Earth Dam with Inclined Clay Core

在坝体粗粒料湿化变形室内试验研究成果的基础上,结合粘土斜心墙坝蓄水变形及实际运行中存在的问题,进行了有限元仿真计算.分析结果表明,在蓄水湿化变形后,坝体的最大沉降区域向心墙上游侧偏移,上游侧坝体围压显著降低,坝体上游侧应力水平增大.这与大坝变形规律较吻合,由此可知,文中所示方法是可行的,研究成果具有一定的工程参考价值.

Aiming at problems of deformation during reservoir impounding and in practical application, earth dam with inclined clay core is simulated by using the finite element method, based on laboratory experimental research achievement of coarse-grained materials ＇ humidification deformation. Analytical results show that after water storage the maximum dam settlement area is toward upstream core wall; the confining pressures of upstream dam obviously decrease while the stress levels increase; the results of which are better consistent with dam＇ deformation law. Therefore, the method is feasible and the research results have considerable ref- erence value in engineering.