中文摘要：

在水利工程中，怎样评价坝肩开挖后的高边坡稳定性一直是人们关注的问题。针对锦屏一级水电站拱坝左岸高边坡，提出一种整体转动边坡模型，模拟边坡发生开裂破坏的三维试验方法。转动该模型的边坡角度就可以不断改变自重场和下滑力，从而评价边坡的安全度。试验结果显示：（1）主要开裂变形及倾倒破坏大部分发生在锚固边界区域。断层f5，f8，f42—9，裂隙密集带SL44—1及煌斑岩脉X等软弱结构面控制岩体的开裂和边坡的失稳；（2）边坡开裂的安全度蜀为1．92，整体极限安全度墨为3．26；（3）左坝肩上部高程的大面积锚索加固措施，及坝顶平台（1885m）以上开挖减载作用，使抗滑稳定安全度提高非常有效，增加了边坡的整体安全度；（4）所建议的高边坡破坏物理试验方法可以有效评价类似岩质高边坡的整体稳定性。

英文摘要：

A question which frequently arises in discussions on slope stability is how high and how steep can a rock slope be excavated for hydraulic engineering. A new slope failure test method is proposed; in which the slope model is rotated by hydraulic lift from stable state to failure. In this test, with increasing the rotation angle of model, the dead-weight and the total force tending to induce sliding would be changed; and the crack initiation, propagation, the rock mass slippage and final failure process can be observed by DV monitor. Finally, the factors of safety of slope stability also can be evaluated with displacement data sensors. The experimental results show that： （1） The bending and toppling cracks in the zone of the slope without reinforcement as well as strong relaxation and tensional cracks are extended commonly. The controlling factors for rock cracking and slope failure could be observed for the faults f5, f8, f42 - 9, SL44 - 1 and lamprophyre X. （2） The factor of safety of slope cracking, K1 equals 1.92; and the factor of safety of integrity stability, K2 equals 3.26. （3） The reinforcement design with bolts and long anchors are very effective for keeping cracks closed in rock and the slope stability. （4） The experimental method proposed is effective to evaluate the factor of safety of slopes similar to Jinping high slope.