用离散元法研究锚索锚杆联合加固边坡的机理

Study on the Mechanism of Side Slope Reinforced with Anchor Cable and Rock Bolt Using Discrete Element Method

采用离散单元法深入研究了高陡岩石边坡在未加固、锚杆加固、锚索加固和长锚索短锚杆联合加固情况下,边坡岩体中的塑性区和应力场分布特征,从力学机制上阐述了长锚索短锚杆联合加固高陡岩石边坡的机理。结果表明:锚索锚杆联合加固边坡,能改变岩体较大范围内应力场分布,减少应力集中的区域和降低应力集中程度;在锚索间布置的锚杆,强化了局部的岩体强度,使得形成的"加固梁壳"更有利于坡体稳定。

This paper studies plastic zone and stress field distribution characteristics of slope rock mass under the condition of high steep rock slope without reinforcement,with rock bolt reinforcement,anchor cable reinforcement,joint reinforcement of long anchor cable and short rock bolt using discrete element method,and describes the mechanism of joint reinforcement of high steep rock slope with long anchor cable and short rock bolt from mechanics.The result shows that joint reinforcement of anchor cable and rock bolt can change stress field distribution of rock mass in a larger extent and reduce stress concentration zone and degree.Rock bolt distributed in anchor cable strengthens local rock mass strength,causing ＂reinforced concrete beams＂ more favorable for slope stability.