弯曲倾倒模式下薄层状反倾岩质边坡锚固力研究

发布时间：2018-02-14 07:51

本文关键词： 反倾岩质边坡弯曲倾倒模式锚固力解析解数值模拟　出处：《中南大学学报(自然科学版)》2017年10期 　论文类型：期刊论文

【摘要】：基于悬臂梁理论建立锚固力解析计算模型,以某薄层状反倾岩质边坡为实例,进行锚固力计算及相关参数敏感性分析,并以数值模拟加以对比分析。研究结果表明:此类边坡锚固力计算可划分为倾倒锚固区和滑动锚固区,其中倾倒锚固区折断深度和锚固力都随坡顶距增大而减小,且最大折断深度和最大锚固力对相关参数敏感性由大到小依次为:层厚、抗拉强度、层间内摩擦角。数值模拟中锚索轴力增量比随坡顶距增大而减小,与解析计算结果变化规律一致,且加固倾倒锚固区比加固滑动锚固区对于控制边坡水平位移效果更加明显。
[Abstract]:Based on the cantilever beam theory, the analytical calculation model of anchoring force is established. The Anchorage force calculation and the sensitivity analysis of the related parameters are carried out by taking a thin-layer anti-dip rock slope as an example. The results show that the Anchorage force of this kind of slope can be divided into toppling Anchorage area and sliding Anchorage area, in which the fracture depth and the Anchorage force decrease with the increase of the slope top distance. The sensitivity of the maximum breaking depth and the maximum anchoring force to the relative parameters is as follows: layer thickness, tensile strength, interlaminar friction angle. In numerical simulation, the axial force increment ratio of anchor cable decreases with the increase of slope top distance. The results are consistent with the analytical results, and the effect of strengthening the toppling Anchorage area is more obvious than that of the sliding Anchorage area in controlling the horizontal displacement of the slope.
【作者单位】：中国地质大学工程学院;中国电建集团成都勘测设计院有限公司;
【基金】：国家重点基础研究发展计划(973计划)项目(2011CB710605) 中国电建集团成都勘测设计院有限公司科技项目(P225-2014)~~
【分类号】：TU45

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