基于离散元法的反倾边坡动力破坏模式及分区研究  

Dynamic failure mode and zoning of anti-inclined slope based on discrete element numerical simulation method

作　　者：谌永刚 汤华[2] 秦雨樵 CHEN Yong-gang;TANG Hua;QIN Yu-qiao(School of Civil Engineering&Architecture,Anhui University of Science&Technology,Huainan 232001,China;Institute of Rock&Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《河南城建学院学报》2024年第1期64-71,95,共9页Journal of Henan University of Urban Construction

摘　　要：在地震作用下,一旦诱发反倾路堑边坡的失稳破坏,将对高速公路的安全运行带来不可估量的损失。为研究反倾边坡的动力响应特征,利用UDEC离散元软件模拟了Scavia反倾边坡模型在双向地震作用下的位移过程,分析了块体的运动模式。结果表明:在双向地震作用下,反倾边坡各岩块从稳定状态到滑出坡体的运动状态是相互转换的,靠近坡体后缘岩块运动状态的相互转换更为剧烈;根据块体的运动状态,可以分为3个区域,其中位于坡体前端的岩块主要经历“滑动—倾倒—滑动-倾倒”的状态变化,坡体中部则在滑动-倾倒与滑动状态之间相互转换,且转换速度慢,而坡体后缘岩块运动模式为“滑动—倾倒—滑动-倾倒—滑动”状态,其中滑动-倾倒状态到滑动状态相互转换,且转换速度快。Under the action of earthquakes,once the instability and failure of the anti-inclined cutting slope are induced,it will bring immeasurable significant losses to the operational safety of highways.In order to further study the dynamic response characteristics of the anti-inclined slope,this paper used UDEC discrete element software to simulate the displacement process of the Scavia anti-inclined slope model under bidirectional seismic action,and analyzed the block motion mode.The results show that:(1)Under bidirectional seismic action,the motion state of each rock block in the anti inclined slope transitions from stable state to sliding out of the slope,and the closer the rock block is to the rear edge of the slope,the more intense the transition between the motion states of each rock block;(2)According to the motion state of the block,it can be divided into three regions.The rock block located at the front of the slope mainly undergoes a state change of"sliding,dumping,sliding-toppling",while the rock block in the middle of the slope transitions between sliding-toppling and sliding states,but the transition speed is relatively slow.The movement mode of the rock block at the rear edge of the slope is"sliding,toppling,sliding-toppling,sliding"state,where the sliding-toppling state transitions to the sliding state and the transition speed is fast.

关 键 词：地震作用 反倾边坡 离散元数值模拟 岩块运动模式 

分 类 号：P642.22[天文地球—工程地质学]