水力和超载条件下锚固岩石边坡动态稳定性拟静力分析

Quasi-static analysis of seismic stability of anchored rock slope under surcharge and water pressure conditions

基于极限平衡理论,综合考虑水力条件、坡顶超载、地震荷载效应和锚固效应对岩石边坡进行了全面的稳定性分析。计算给出了多影响因素条件下岩石边坡稳定性安全系数的表达式,并重点分析了几种相关参数组合对岩石边坡稳定性的影响。分析表明,坡顶张拉裂缝积水、地下水渗流作用、滑面出流缝被堵塞、地震影响效应不利于岩石边坡抗滑稳定性,而锚索锚固效应则对提高边坡抗滑稳定性有积极作用;坡顶张拉裂缝积水、滑面出流缝被堵塞、水平向地震影响效应都不利于岩石边坡抗倾覆稳定性,但锚索锚固效应、坡顶超载、与竖直方向地震效应则对提高边坡抗倾覆稳定性有益。最后针对工程实际,提出了相应的工程建议。

Based on the limit equilibrium method,a rounded analysis for rock slope have been undertaken,in which several influencing factors such as water pressure,surcharge,seismic loading and anchoring force have been taken into account.The safety factor expressions for rock slope stability subjected to the condition of many factors have been deduced.Parametric analysis has shown that depth of water in tension crack,groundwater seepage force,blocked outflow suture,seismic loading,surcharge have a disadvantage effect on the rock slope stability against sliding;but anchorage effect of anchor blots has a beneficial effect on the rock slope stability against sliding.Parametric analysis has also shown that depth of water in tension crack,blocked outflow suture,horizontal seismic loading have a disadvantage effect on the rock slope stability against overturning;but surcharge,anchorage effect of anchor blots and vertical seismic loading have a advantageous effect on the rock slope stability against overturning.Finally,the project proposals have been put forward according to the engineering practice.