岩质边坡的稳定性分析及支护措施研究

Study on Stability Analysis and Support Measures of Rock Slope

以某电厂建设过程中形成的岩质边坡为研究对象,建立工程地质概化模型,运用极限平衡理论进行计算分析。结果表明,天然工况下,边坡安全系数虽小于规范要求,但均在1.33~1.35之间,发生整体失稳的可能性较小;地震工况下,稳定性计算结果满足规范要求,不会发生失稳;暴雨工况、暴雨叠加地震极端工况的作用下,边坡稳定性计算结果不能满足规范要求,边坡大概率会失稳;支护后的边坡安全系数大幅提高,加固效果显著,4种工况下均满足规范要求。

Taking the rock slope formed during the construction of a power plant as the research object,a generalized model of engineering geology is established,and the limit equilibrium theory is used for calculating and analyzing the stability of the slope.The results show that,(a)under natural working conditions,the safety factors of the slope are between 1.33 and 1.35,which are less than the requirements of specification,but the possibility of global instability is small;(b)under seismic conditions,the stability calculation results meet the requirements of specification,so there will be no instability;and(c)under the action of heavy rain conditions or extreme conditions of heavy rain combined with earthquake,the slope stability calculation results cannot meet the requirements of specification,and the slope will be unstable with a high probability.After the supporting,the slope safety coefficient is greatly improved,the reinforcement effect is significant,and the requirements of specification are met in all four working conditions.