拱坝坝肩稳定的可靠度分析

Reliability analysis of stability of arch dam abutment

当拱坝坝肩岩体为断层、节理裂隙、层面等结构面所围成,有可能产生滑移时,就应进行整体抗滑稳定分析。文章在考虑滑移体的构成、滑动的形式、滑动面抗剪断强度参数等的随机性的基础上,使用可靠度理论,对拱坝坝肩抗滑稳定可靠度进行分析;以某拟建拱坝为算例,计算结果是比较理想的。

When the rock mass of dam abutment is enclosed by faults, joint fissures and bedding planes,it is necessary to carry out holistic anti-slide stability analysis in order to make the abutment withstand potential slide. In the paper ,the randomness in the constitution of the sliding mass ,in the form of sliding and in the shear strength of the sliding surface is considered ,the anti-slide reliability of one arch dam is analyzed ,and satisfying results are obtained.