桩承载力反向自平衡试桩法数值模拟分析  

Numerical simulation analysis of reverse self-balanced test method for pile bearing capacity

作　　者：刘永莉 刘志杰 巴军涛 肖衡林 郭斌 LIU Yongli;LIU Zhijie;BA Juntao;XIAO Henglin;GUO Bin(School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China;CCCC SHEC Construction Engineering Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,湖北武汉430068 [2]中交二航局建筑工程有限公司,湖北武汉430056

出　　处：《河海大学学报（自然科学版）》2023年第4期81-87,共7页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金项目(51608181,52078194)。

摘　　要：为推动反向自平衡试桩法在实践中的应用,采用有限元分析方法对反向自平衡试桩法进行了数值模拟分析。以管桩为例,运用ABAQUS有限元软件建立反向自平衡试桩法数值模型,分别采用位移控制法和荷载控制法进行桩身和桩顶加载模拟,得到了基桩抗压极限承载力,进行了桩身轴力和桩侧摩阻力分析;对建立的数值模型进行了位移控制法下的静载试验模拟,并与反向自平衡试桩法模拟得到的极限承载力进行了对比分析。模拟结果表明,反向自平衡试桩法确定的基桩极限承载力与静载试桩法结果较为接近,不需要进行正、负摩阻力转换,但也存在平衡点位置的确定问题。In order to promote the application of the reverse self-balanced pile test method in the practice engineering,the numerical simulation analysis of the reversed self-balanced pile test method is carried out by using the finite element analysis method.Taking the pipe pile as an example,the numerical model of reverse self-balanced test pile method is established by the ABAQUS software.The displacement control method and load control method are used to simulate the loading of pile body and pile top,and the ultimate compressive bearing capacity of the foundation pile is obtained,from which the pile axial force and the pile lateral friction resistance can be analyzed.The established numerical model is modeled by the static load test with the displacement control method and compared with the ultimate bearing capacity simulated by the reverse self-balance test method.The simulation results show that the ultimate bearing capacity of foundation pile determined by the reverse self-balance test method is relatively close to the result of the static load test method,and the conversion of positive and negative friction resistance is not necessary,but there is also the problem of determining the position of the balance point.

关 键 词：基桩 静载试桩法 自平衡试桩法 反向自平衡试桩法 ABAQUS 荷载-位移曲线 

分 类 号：TU473.11[建筑科学—结构工程]