西北某水电站1号变形体特征及稳定性分析

Characteristics and stability analysis of No.1 deformed body of a hydropower station in northwest China

西北某水电站1号变形体位于近坝库岸左岸,其稳定性直接影响施工与运行的安全。通过简述基本地质条件,研究工程地质特征,分析成因机制及力学特征,并采用有限元强度折减法和刚体极限平衡法,评价了变形体的稳定性。结果表明,该变形体在天然条件下处于稳定状态,电站蓄水后,其稳定系数不能满足规范控制标准。因此,通过对1号变形体稳定性评价,为边坡工程设计提供相关依据。

The deformed body No.1 of a hydropower station in the northwest is located near the left bank of the dam reservoir bank.Its stability directly affects the safety of construction and operation.By briefly describing the basic geological conditions,studying the engineering geological characteristics,analyzing the genetic mechanism and mechanical characteristics,and using the finite element strength reduction method and the rigid body limit equilibrium method,the stability of the deformed body is evaluated.The results show that the deformation body is in a stable state under natural conditions,and its stability coefficient cannot meet the standard control standard after the power station impinges water.Therefore,through the evaluation of the stability of No.1 deformation,the relevant basis is provided for the slope engineering design.