摘要
为分析岩质路堑高边坡的开挖支护对边坡变形破坏及边坡稳定性的影响,利用离散元数值模拟与原位监测相结合的方法,对开挖适时支护与开挖未支护两种工况进行比较,评价了锚杆支护的效果。结果表明:边坡开挖引起的竖向位移主要集中于开挖面中部;在相同开挖条件下,经适时支护后,边坡开挖面临空向水平位移最大值减小2.50 cm,安全系数提高8.62%,处于基本稳定状态;数值模拟结果与原位监测数据基本吻合,说明离散单元法对于分析岩质边坡稳定性问题的适用性。
In order to analyze the impact of excavation and support of high rock cutting slopes on the stability of slope,the two conditions were compared between excavation without support and timely supported by bolt.The effect of bolt support was evaluated through the method of combining discrete element numerical simulation with field monitoring.The results showed that the vertical displacement caused by excavation was mainly concentrated in the middle of the excavation face.Under the same excavation conditions,the maximum value of the slope excavation face space-facing horizontal displacement was reduced by 2.50 cm,and the safety factor of cutting slope was increased by 8.62%,indicating that the slope was in a basically stable state.In addition,the validity and correctness of the numerical simulation results were verified by comparing with the field monitoring data,which indicated the applicability of the discrete element method for analyzing the stability of rocky slope.
作者
丁玎
陈志坚
DING Ding;CHEN Zhijian(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2024年第2期163-170,共8页
Journal of Shenyang University：Natural Science
基金
江苏省政策引导类计划项目(BY2015002-05)。
关键词
路堑边坡
数值模拟
离散单元法
现场监测
锚杆加固
cutting slope
numerical simulation
discrete element method
field monitoring
anchor bolt reinforcement
