长期竖向循环荷载作用下黄土中单桩沉降特性模型试验研究

郭鹏飞; 王旭; 杨龙才; 罗浩威

doi:10.11779/CJGE201503021

长期竖向循环荷载作用下黄土中单桩沉降特性模型试验研究 English Version

1. 同济大学道路与交通工程教育部重点实验室,上海 200092; 2.兰州交通大学土木工程学院,甘肃兰州 730070; 3. 中铁西北科学研究院有限公司深圳南方分院,广东深圳 518048

基金项目: 国家自然科学基金项目（51268030,41262010）; 长江学者和创新团队发展计划项目（IRT1136）

详细信息

作者简介:
郭鹏飞(1987- ),男,博士研究生,主要研究方向为岩土及地下工程。E-mail: tjdxgpf@163.com。

中图分类号: TU47
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出版历程
- 收稿日期: 2014-07-21
- 发布日期: 2015-03-23

Model tests on settlement of single pile in loess under long-term axial cyclic loading

1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China; 2. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; 3. South Branch of Northwest Research Institute Co., Ltd. of CREC, Shenzhen 518048, China

摘要

摘要:
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- 循环荷载 /
- 桩 /
- 黄土 /
- 饱和黄土 /
- 模型试验
Abstract: The settlement of a single pile under long-term axial cyclic loading is different from that under static loading. To study how the pile-top displacement s and displacement amplitude ρ_c change with the number of cycles and to analyze the development model of pile-top cumulative displacement under cyclic loading, a series of single-pile model tests on loess and saturated loess are performed. It is found that the static bearing capacity of the single pile in saturated loess is much lower than that in loess. The test s-N curve of pile head under cyclic loading in loess and saturated loess can be described by power function. With the same load size, the displacement of the single pile under cyclic loading is lower than that under static loading in loess. The cyclic displacement ratios (ratio of cyclic load displacement to static load displacement) are mostly in the range of 0.6 to 0.8. But the displacement of the single pile under cyclic loading is much higher than that under static loading in saturated loess, and the cyclic displacement ratios will grow with the cyclic loading ratio in a linear rule. The single-pile displacement amplitude under cyclic loading in loess is obviously higher than that in saturated loess, and it is mainly because of the cyclic loading amplitude and soil properties.
- cyclic loading /
- pile /
- loess /
- saturated loess /
- model test

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参考文献(16)

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