水电站进水口边坡滑坡体地质的稳定性敏感度分析

Stability sensitivity analysis on landslide geology at water intake slope of hydropower station

隧洞的进水口段一般位于受地表水高度侵蚀的坡面上,通常埋深较浅,隧洞入口结构上承载岩石拱难以形成,因此很难得到其稳定性保证。本文结合已建的复杂边坡工程实例,对于用有限元法与极限平衡法研究工程边坡实例的精确性进行对比分析,研究计算方法及土体的强度参数对土坡稳定安全系数的影响。结果表明,Bishop法得出的稳定安全系数居中,Janbu法得出的稳定安全系数最大。

The inlet section of the tunnel is generally located on the slope highly eroded by surface water,and the buried depth is often very shallow.It is difficult to form the bearing rock arch on the tunnel inlet structure,so it is difficult to ensure its stability.Combined with the existing complex slope engineering examples,this paper compares and analyzes the accuracy of the finite element method compared with the limit equilibrium method,analyzes the influence of the calculation method and the strength parameters of the soil on the stability safety factor of the soil slope,and obtains that the stability safety factor obtained by Bishop method is in the middle,and the stability safety factor obtained by Janbu method is the largest.