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裂隙水压力作用下锚杆加固岩石边坡稳定性分析

     

摘要

裂隙中的渗流是岩石边坡失稳的莺要因素之一.渗流对岩石裂隙存在静水压力和动水力,特别是暴雨会引起裂隙中的渗流压力迅速增大,造成滑坡等地质灾害.锚杆作为岩土工程的重要支护手段,被广泛应用于岩土加固工程中.基于岩土甥性极限平衡理论,从塑性功角度首先探讨了岩土边坡能量安全系数的取值,进而对岩体裂隙中存在静水压力和动水力情况下,锚杆加同岩体边坡的稳定性进行了研究,建立了相应的计算方法和公式.结合工程算例,重点分析了渗透压力作用对岩体边坡稳定性的影响以及锚杆的加固作用.分析表明,渗透压力对岩体边坡稳定性的影响是不可忽略的.%Seepage in fissure is one of the most important factors in the failure of rock slope. There are hydrostatic pressure and hydrodynamic pressure on rock fissures by the seepage. In particular, heavy rain will bring the seepage pressure in cracks increase rapidly, resulting in landslides and other geological disasters. Rock bolt, as an effective rocky reinforcement measure, is widely applied in civil and mining engineering. Based on plastic limit equilibrium method, the reasonable value of the energy safety factor about geotechnical slope is determined from plastic work. In case that the rock fissures exist in hydrostatic pressure and hydrodynamic pressure, the slope of rock bolt reinforcement stability has been studied to establish the corresponding calculation methods and formulas. With engineering examples, the influence of seepage pressure on the stability of rock slope is mainly analyzed, as well as the anchoring reinforcement. The analysis shows that the influence of seepage on the stability of rock slope can not be ignored.

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