地震作用下压力型锚索锚固段设计分析  

Design and Analysis of Pressure Anchor Cable Anchorage Section Under Earthquake

作　　者：叶红[1,2] 陶廷权[3] YE Hong;TAO Ting-quan(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;School of Transportation Engineering,Wuhan Technical College of Communications,Wuhan 430065,China;CCCC-FHDI Engineering Co,Ltd,Guangzhou 510230,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]武汉交通职业学院交通工程学院,武汉430065 [3]中交第四航务工程勘察设计院有限公司,广州510230

出　　处：《武汉理工大学学报》2023年第1期80-84,共5页Journal of Wuhan University of Technology

基　　金：湖北省教育厅科学技术研究计划指导性项目(B2021520)。

摘　　要：为了进一步完善压力型锚索锚固设计方法,基于地震作用的拟静力等效荷载方法,根据竖向集中力作用在半无限体内的Mindlin基本解,结合国家现行相关规范推导了地震作用下锚索轴向拉力设计值表达式和压力型锚索锚固段长度设计值表达式。通过算例分析了综合水平地震系数和预应力荷载对压力型锚索锚固设计的影响。结果表明:综合水平地震系数(预应力荷载)同锚索轴向拉力设计值、锚固段注浆体受到的压应力峰值以及注浆体与岩土体间剪应力峰值之间存在正相关关系。该研究成果进一步优化了压力型锚索锚固段的设计方法,可为地震作用下锚索加固设计提供一定的理论支持。In order to improve the design method of pressure anchor cable more accurately, expression of axial tension of anchor cable under earthquake and expression of anchor length of pressure anchor cable were derived in combination with relevant national current codes based on the quasi-static method and Mindlin basic solution.The influence of comprehensive horizontal seismic coefficient and prestress load were analyzed by examples.The results show that, there is a positive correlation between the comprehensive horizontal seismic coefficient(prestress load) and the axial tension of anchor cable, the compressive stress peak of grouting body and the shear stress peak of grouting body.The research results further optimize the design method of anchor section of pressure anchor cable, which could provide some theoretical support for anchor cable reinforcement design under earthquake.

关 键 词：岩土工程 压力型锚索 地震作用 MINDLIN 工程设计 

分 类 号：TU457[建筑科学—岩土工程]