水电站进水口高边坡稳定性三维极限分析

某水电站进水口边坡为一典型的顺向坡，岩层发育有数层软弱夹层，施丁开挖时坡脚岩层将被大范围切断，由此产生施工期和蓄水后进水口边坡的稳定问题，并给工程安全带来威胁。采用边坡稳定三维极限(上限)分析方法，对进水口边坡在施工期和运行期的三维抗滑稳定性进行了分析研究。分析表明，进水口边坡在施工期和运行期的稳定性较差，需采取进一步的加固措施。研究结果为工程建设提供了有价值的参考依据。

3D limit analysis of stability of high slope at intake of huge hydropower station

The intake slope of a huge hydropower station is a typical consequent slope and the rock stratum will be cut off with the excavation, which leads to the unstable problem of the intake high slope. The authors represent the principle of the 3D limit analysis (upper bound) method, by which the stability of the intake high slope is estimated. Estimation result shows that the stability of the intake high slope is poor during the construction period and operatoin period of the huge hydropower station, so the reinforcement design is necessary.