西南地区典型弯曲倾倒式滑坡变形演化机理及防治研究  

Evolution Mechanism and Prevention of Typical Bending Deformation Dump Landslide in Southwest China

作　　者：邢一飞[1] 张诚[2] 王建辉[2] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]河北省地矿局第四水文工程地质大队,沧州061000

出　　处：《科学技术与工程》2016年第22期156-161,共6页Science Technology and Engineering

摘　　要：弯曲-拉裂(倾倒)变形是西南地区常见的边坡失稳的一种复杂的地质模式。通过实例研究,分析了这类边坡产生变形破坏的地质力学机制及其演化过程,然后采用离散单元法对开挖过程和最终稳定性进行模拟和分析,获得的坡体变形破坏特征、变形破坏范围与现场调查的坡体变形破坏特征基本一致,进一步验证了该类滑坡的演化机制。此外,以弯曲倾倒式滑坡概化模型为例,进行时空演化过程控制,主要从三方面进行研究:锚杆间距、锚杆嵌入角度和锚杆长度,提出弯曲倾倒式滑坡应用锚杆防治结构的优化设计方法,对类似的工程岩质边坡防治具有一定的参考价值。Bending and toppling deformation is a complex geological model of common slope failure in Southwest, China. Firstly, a case indicated geomechanics mechanism and evolution process of bending and toppling landslides due to slope failure; then the excavation process of slope was simulated and its stability was analyzed by using the discrete element method, the slope deformation and failure characteristics obtained by numerical modeling is substantially consistent with the characteristics by field investigation, further validates the kind of landslide evolution mechanism. In addition, for generalized model of this slope example, spatial-temporal evolution processes of landslide were studied from three aspects： anchor spacing, anchor embedded angles and anchor length. Finally, an optimization method of landslide prevention was proposed based on anchor structure. It’s of certain reference value for the prevention of similar rock slope engineering.

关 键 词：弯曲倾倒 滑坡 地质模式 数值模拟 演化机理 防治 

分 类 号：P642.22[天文地球—工程地质学]