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针对张峰水库地质条件复杂、覆盖层含有软弱夹层的问题,采用三维静动力有限元法,基于邓肯—张非线性弹性模型和修正的哈定—德涅维奇模型,模拟了张峰水库粘土斜心墙堆石坝在竣工期、运行期的应力应变情况,得出了应力应变的分布规律。结果表明,各工况下的坝坡安全系数均大于规范允许值,坝基软弱夹层不影响大坝的稳定安全性;竣工期坝体最大沉降位移为33 cm(约为最大坝高的0.46%),运行期最大水平向位移为31.6 cm;竣工期和运行期坝体内部应力水平均小于1。
Aiming at the complex geological conditions of Zhangfeng reservoir and the overburden containing the weak interlayer, the three-dimensional static and dynamic finite element method was used to simulate the deformation of Zhangfeng reservoir clay based on the Duncan-Zhang nonlinear elastic model and the revised Hadinger- The stress and strain distribution of the inclined core rockfill dam during the construction period and the operation period are obtained. The results show that the safety factor of dam slope under all operating conditions is larger than the allowable value of the standard, and the weak intercalation of the dam foundation does not affect the stability and safety of the dam. The maximum settlement displacement of the dam at completion is 33 cm (about 0.46% of the maximum dam height) , The maximum horizontal displacement during operation is 31.6 cm; the internal stress level of dam body during the completion and operation phases is less than 1.