| 矩形桩沉桩挤土效应透明土模型试验研究 |
| |
| 引用本文： | 周航,袁井荣,刘汉龙,楚剑.矩形桩沉桩挤土效应透明土模型试验研究[J].岩土力学,2019,40(11):4429-4438. |
| |
| 作者姓名： | 周航 袁井荣 刘汉龙 楚剑 |
| |
| 作者单位： | 1.重庆大学 土木工程学院，重庆 400450；2.重庆大学 山地城镇建设与新技术教育部重点实验室，重庆 400450；
3. 南洋理工大学 土木与环境工程学院，新加坡 639798 |
| |
| 基金项目： | 国家自然科学基金项目（No. 51708063，No. 51420105013）。 |
| |
| 摘 要： | 矩形桩沉桩挤土效应与传统圆形截面桩不同，传统的理论模型和试验技术不适用于研究矩形截面桩沉桩挤土效应。基于透明土变形可视化技术，研究了矩形截面桩沉桩挤土的位移场变化规律。试验结果表明，矩形桩沉桩后，桩周可以分为两块区域：靠近矩形桩身的过渡区域，在此区域内挤土位移模式呈现非柱对称特征，过渡区半径约为4deq～5deq，远离桩身的圆孔扩张区域，该区域内挤土位移呈现柱对称特征。根据矩形截面桩的沉桩挤土试验，推导出了矩形桩截面的修正扩孔理论，并将理论计算的位移值与模型试验测量值进行对比，验证修正扩孔理论的合理性。
|
| 关 键 词： | 矩形桩 位移场 修正扩孔理论 透明土 |
| 收稿时间： | 2018-09-06 |
Model test of rectangular pile penetration effect in transparent soil |
| |
| ZHOU Hang,YUAN Jing-rong,LIU Han-long,CHU Jian.Model test of rectangular pile penetration effect in transparent soil[J].Rock and Soil Mechanics,2019,40(11):4429-4438. |
| |
| Authors: | ZHOU Hang YUAN Jing-rong LIU Han-long CHU Jian |
| |
| Institution: | 1. College of Civil Engineering, Chongqing University, Chongqing, 400450, China;
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing, 400450, China;
3. School of Civil and Environmental Engineering, Nanyang Technology University, Singapore 639798, Singapore |
| |
| Abstract: | The penetration effect of the rectangular pile is different from the conventional circular cross-section pile. However, conventional theoretical models and experimental techniques are not suitable for investigating the rectangular cross-section pile. Based on deformation visualization technique of transparent soil, this paper investigated the displacement field variation law induced by the rectangular pile. Experimental results show that after driving of rectangular pile, the soil displacement of the surrounding soil after installing a rectangular pile can be divided into two typical areas. A transition area is produced around the rectangular pile, where soil displacement is non-columnar symmetry characteristics, and its radius is around 4deq-5deq. The expansion area of the circular hole is located away from the pile, and its displacement presents the characteristics of cylindrical symmetry. According to pile driving compaction tests of the rectangular cross-section pile, this study proposed a modified cavity expansion mode for rectangular pile and verified the rationality of the modified model by comparing theoretical values with experimental data. |
| |
| Keywords: | rectangular pile displacement field modified cavity expansion mode transparent soil |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
