危岩锚固工程锚杆数量计算方法研究  

Study on calculation method of anchor bolt number in overhanging rock anchoring works

作　　者：陈洪凯 王圣娟 王全才[2] Chen Hongkai;Wang Shengjuan;Wang Quancai(School of Urban and Architectural Engineering,Zaozhuang University,277160,7Zaozhuang.China;Chengdu Instiute of Mountain Hazards and Environment,Ministry of Water Resources,Chinese Academy of Sciences,610041,Chengdu,China)

机构地区：[1]枣庄学院城市与建筑工程学院,枣庄277160 [2]中国科学院水利部成都山地灾害与环境研究所,成都610041

出　　处：《应用力学学报》2021年第2期770-775,共6页Chinese Journal of Applied Mechanics

基　　金：国家重点研发计划(2018YFC1505405)。

摘　　要：危岩锚固工程设计的关键是合理确定所需锚杆数量。本文构建了压剪破坏型危岩和拉剪破坏型危岩的锚固计算模型,根据静力平衡关系给出了压剪破坏型危岩的锚固荷载计算方法,根据力矩平衡关系给出了拉剪破坏型危岩锚固荷载计算方法;由锚固荷载和单根锚杆承载力,得到了危岩的锚固工程所需锚杆数的计算式。实例分析表明该方法具有良好的可操作性,该研究成果已被中国地质灾害防治工程行业协会正在组织编撰的《地质灾害防治指南》采纳,对于有效防治危岩灾害具有积极意义。The key to the design of overhanging rock anchoring works is to reasonably determine the number of anchor rods required.This paper established two anchor calculation models,for compression-shear failure type overhanging rock and tension-shear failure type overhanging rock.A calculation method of anchoring load is established through the static balance principle for compression-shear failure type overhanging rock,while that through the moment balance for the tension-shear failure type overhanging rock.Formulas to determine number of bolts in anchoring works of overhanging rock are established based on anchoring load and the bearing capacity of a single anchor rod.Case analysis shows that the method has good operability.The research results have been included in the"Guidelines for the Prevention and Control of Geological Disasters"which is being organized and compiled by the China Geological Disaster Prevention and Control Engineering Industry Association,which is of positive significance for effective prevention and control of overhanging rock disasters.

关 键 词：危岩 锚固工程 锚固荷载 锚杆数 计算方法 

分 类 号：TU451[建筑科学—岩土工程] P642.21[建筑科学—土工工程]