不同嵌岩深度下抗拔桩承载特性研究  

RESEARCH ON BEARING CHAR ACTERISTICS OF UPLIFT PILE UNDER DIFFERENT DEPTHS OF ROCK EMBEDMENT

作　　者：刘红军[1] 陈锋 杨超 周志军[1] LIU Hong-jun;CHEN Feng;YANG Chao;ZHOU Zhi-jun(School of Civil Engineering and Architecture,Wuyi University,529020,Jiangmen,Guangdong.China)

机构地区：[1]五邑大学土木建筑学院,广东江门529020

出　　处：《建筑技术》2024年第3期274-277,共4页Architecture Technology

基　　金：广东省普通高校特色创新项目(自然科学类)(2020KTSCX152);江门市基础与理论科学研究类科技计划项目(2020JC01023);校企合作项目(2020CX10)。

摘　　要：以广东省江门市某工程为例,通过有限元分析软件ABAQUS,结合地勘报告及现场对桩基进行抗拔静载试验得出的荷载–位移曲线图,建立抗拔桩三维有限元模型进行数值模拟计算分析,研究不同嵌岩深度增量下抗拔桩的承载特性。研究成果表明:增加嵌岩深度可在一定程度上提高桩基抗拔承载力,但二者之间并非呈线性增长关系。当嵌岩深度增量为3D时,相较于原试桩的桩顶位移量减小54.2%,抗拔承载力提高105.2%,对桩基抗拔承载力的提高效果尤为显著。This paper takes a project in Jiangmen,Guangdong Province as an example,through the finite element analysis software ABAQUS,combined with the ground investigation report and the load-displacement curve derived from the on-site static load test on the pile foundation,establishes a three-dimensional finite element model of the pile to carry out numerical simulation and analysis,and researches the load-bearing characteristics of the pile with different incremental rock embedment depth.The research results show that:increasing the embedded rock depth can improve the pile foundation pullout capacity to a certain extent,but the two are not linear growth,when the increment of embedded rock depth is 3D,compared with the original test pile,the pile top displacement is reduced by 54.2%,and the pullout capacity is increased by 105.2%,which is particularly significant for the improvement of the pile foundation pullout capacity.

关 键 词：抗拔桩 静载试验 数值模拟 嵌岩深度 承载特性 

分 类 号：TU470[建筑科学—结构工程]