微型抗拔桩桩土接触面模拟分析  

Simulation Analysis of Contact Surface of Micro Uplift Pile

作　　者：周俊鹏[1,2] 黄雪峰[1,2] 杨殷豪 方晟[1,2] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311 [2]后勤工程学院岩土力学与地质环境保护重庆市重点实验室,重庆401311 [3]西南大学工程技术学院,重庆400700

出　　处：《后勤工程学院学报》2016年第6期35-40,共6页Journal of Logistical Engineering University

摘　　要：为研究微型抗拔桩桩土接触面参数对其力学性质的影响,在现场单桩竖向抗拔静载试验的基础上,采用ANSYS面-面接触单元模拟桩土接触特性。研究表明:桩土接触黏聚力对侧摩阻力的影响远大于摩擦因数;桩对桩周土的影响范围与桩径成正比;桩身轴力随埋深的分布与桩长有关,桩长超过一定范围时,传递到下部的荷载较小。将模拟结果与试验结果进行对比,二者发展趋势较一致,说明ANSYS分析结果可为工程设计和施工提供借鉴和参考。In order to study the influence of contact surface on the mechanical properties of micro uplift pile, vertical uplift staticload test on single pile has been carried out, and surface to surface contact element of ANSYS is cited to simulate the contact betweenpile and soil. The research shows that the contact cohesion between pile and soil has a greater influence on the lateral friction than thefriction coefficient. The border of the soil disturbed by the pile is proportional to the size of the pile diameter. Axial force along the pileis related to the length of the pile; when the length of pile exceeds a certain range, the axial force of the lower body of pile is small.According to the comparative results between simulation ones and experimental ones, the development trend is consistent, so the resultsof ANSYS analysis can be used to guide the future engineering design and construction.

关 键 词：微型抗拔桩 数值模拟 桩土接触 侧摩阻力 

分 类 号：TU473[建筑科学—结构工程]