基于横向变形约束弹性地基梁法的既有锚索桩极限承载力研究  

Research on ultimate bearing capacity of existing anchor-cable piles based on the elastic foundation beam method restrained by lateral deformation

作　　者：王钰杰 张丽娟 严明[1] WANG Yujie;ZHANG Lijuan;YAN Ming(College of Environmental and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;Sichuan Winshare Vocational College,Chengdu 611330,China)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059 [2]四川文轩职业学院,四川成都611330

出　　处：《中国测试》2024年第4期53-59,共7页China Measurement & Test

摘　　要：以阿坝州岷江电化公司西侧滑坡前缘既有锚索桩为研究对象,既有锚索桩的极限承载力是滑坡综合治理中需要研究的关键。针对该问题,在桩身检测结果和锚索现场抗拉拔试验结果基础上,根据变形协调原理,对横向变形约束弹性地基梁法在桩锚固段地基水平抗力系数按梯形分布下的计算方法进行推导,并采用这种方法进行1-1'剖面既有预应力锚索桩的内力计算。把锚索极限承载力、既有桩身结构承载力和嵌固段地基强度条件共同作为限制条件,通过反分析方式不断逼近限制条件所对应的滑坡推力界限值,发现该工程中嵌固段地基强度对既有锚索桩的极限承载力起控制作用,并最终确定其极限承载力。该文所采用数据及计算方法可为同类工程研究分析提供参考。The existing anchor-cable piles on the west side of the landslide front of Minjiang Electrochemical Company in Aba Prefecture are taken as the research object,its ultimate bearing capacity is the key to study in comprehensive landslide control.In order to solve this problem,on the basis of the test results of the pile body and the results of the on-site pull-out test of the anchor cable,the calculation of the transverse deformationconstrained elastic foundation beam method is deduced when the pile anchorage section foundation horizontal resistance coefficient is trapezoidal distribution according to the principle of deformation coordination.And use this method to calculate the internal force of the existing prestressed anchor-cable piles in the 1-1'section.The ultimate bearing capacity of the anchor cable,the bearing capacity of the existing pile structure and the foundation strength of the anchoring section are jointly used as the limiting conditions.By using the inverse analysis method to continuously approach the limit value of the landslide thrust corresponding to the limit conditions,it is found that the strength of the foundation in the anchorage section of the project controls the ultimate bearing capacity of the existing anchor piles,and its ultimate bearing capacity is finally determined.The data and calculation methods used in this study can provide reference value for similar engineering research and analysis.

关 键 词：既有锚索桩 弹性地基梁 限制条件 反分析 极限承载力 

分 类 号：TB9[一般工业技术—计量学] TU473.1[机械工程—测试计量技术及仪器]