文麻高速公路K39滑坡变形特征与防治效果分析  

Analysis on Deformation Characteristics and Prevention Effect of Landslide K39 on Wenshan-Malipo Expressway

作　　者：李琴琴 毛永强 郑中存 崩兴涛 吴永宁 LI Qinqin;MAO Yongqiang;ZHENG Zhongcun;BENG Xingtao;WU Yongning(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China;CCCC Second Harbor Engineering Company Ltd.,Wuhan 430040,China;China Energy Construction Group Anhui Electric Power Design Institute Co.,Ltd.,Hefei 230601,China;China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056 [2]中交第二航务工程局有限公司,武汉430040 [3]中国能源建设集团安徽省电力设计院有限公司,合肥230601 [4]中国地质大学(武汉),武汉430074

出　　处：《路基工程》2024年第5期199-208,共10页Subgrade Engineering

摘　　要：以文麻高速公路K39滑坡为研究对象,查明滑坡多层滑带的位置,揭示滑体运动特征及其与环境因素的关系,结合有限差分数值模拟计算方法,评价不同阶段抗滑桩工程条件下滑坡的变形和稳定性响应特征。结果表明:K39滑坡具有多期次复合滑坡特性,坡脚岩土体的开挖是导致滑坡复活的主控因素,降雨是影响滑坡稳定性的主要因素,坡脚开挖导致滑坡前缘抗滑效应显著降低;采用“抗滑桩+挡土墙”工程治理后,滑坡变形速率下降明显,但抗滑桩均仍存在缓慢变形,滑坡处于欠稳定状态;布设了第二期抗滑桩之后,稳定性系数达到1.63,满足安全系数要求,表明两期抗滑桩治理后K39滑坡稳定性很好。Taking the K39 landslide of Wenshan-Malipo Expressway as the research object,the location of the multilayer slip zone of the landslide was identified,the motion characteristics of the slide and its relationship with environmental factors were revealed,and the deformation and stability response characteristics of the landslide under the conditions of different phases of anti-slip pile engineering were evaluated by combining with finite-difference numerical simulation calculation method.The results show that the K39 landslide has multi-phase composite landslide characteristics,the excavation of the rock and soil body at the foot of the slope is the main controlling factor leading to the resurrection of the landslide,and rainfall is the main factor affecting the stability of the landslide,and the excavation at the foot of the slope leads to a significant reduction in the anti-slip effect of the leading edge of the landslide.The landslide deformation decreases significantly after adopting the"anti-slip piles+retaining wall"engineering management,but the anti-slip piles still have slow deformation,and the landslide is in an unstable state.After the second phase of anti-slip piles,the stability coefficient reached 1.63,which meets the requirement of the safety coefficient,indicating that the stability of the K39 landslide after two phases of anti-slip pile management is very good.

关 键 词：道路工程 灾变机理 数值分析 多期次复合滑坡 防治效果 

分 类 号：P642[天文地球—工程地质学]