格构锚固作用下滑坡应力分布试验研究  

作　　者：韩冬冬[1] 胡兆江 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]信息产业部电子综合勘察研究院,陕西西安710054

出　　处：《科技创新与应用》2021年第13期54-56,共3页Technology Innovation and Application

基　　金：国土资源大调查项目(编号:1212011220145);中央高校基本科研业务费专项资金项目(编号:310826171016)。

摘　　要：通过滑坡防治格构锚固大型物理模型试验,分析了格构锚固滑坡在坡顶荷载下坡脚、滑体、滑床的土压力分布规律。结果表明:格构梁加固区域内土压力较大,区域外土压力小;横梁作用范围内,坡体内应力呈跨中大、节点小的拱形分布,锚杆减小了滑坡下滑力;坡体纵剖面侧向土压力从上到下呈抛物线分布,滑床土体受拉,滑体土体受压;当滑床土体的拉力到达一定程度后,滑坡可产生新的滑面或者锚杆产生椎体破坏。研究结果可为格构锚固体系的优化设计提供一定参考。Through large-scale physical model test of landslide prevention and control,the study investigated the distribution law of earth pressure at the foot of slope,sliding mass and sliding bed of lattice anchored landslide under the load on the top of the slope.The results show that:the earth pressure in the reinforcement area of lattice beam is larger than that outside the area;the stress in the slope is arched distribution with large span and small node within the scope of crossbeam,and the bolt reduces the sliding force of landslide;the lateral earth pressure on the longitudinal section of the slope is parabolic distribution from top to bottom,the sliding bed soil is under tension,and the sliding mass soil is compressed.With the loading,when the tensile force of the sliding bed soil reaches a certain degree,the landslide may produce new sliding surface or the anchor may cause vertebral body failure.The research results can provide some reference for the optimal design of lattice anchor system.

关 键 词：滑坡 格构锚杆 应力分布 

分 类 号：P642.22[天文地球—工程地质学]