分阶段循环加载条件下温州饱和软黏土孔压和应变发展规律

王军; 蔡袁强; 郭林; 杨芳

分阶段循环加载条件下温州饱和软黏土孔压和应变发展规律 English Version

王军¹,
蔡袁强^1,2,
郭林²,
杨芳¹

(1. 温州大学建筑与土木工程学院，浙江温州 325035；2. 浙江大学岩土工程研究所，浙江杭州 310027）

基金项目: 国家自然科学基金项目（51025827，50808145，50979096）；国家重点基础研究发展计划项目（2011CB411907）；浙江省自然科学基金项目（Y1090105，Y1110751）；温州市科技计划项目（S20100057，S20090006）；浙江省科技计划项目（2010C33182）

详细信息

作者简介:
王军(1980– )，男，博士，副教授，主要从事土动力学、土工抗震方面的研究工作。E-mail: wangjunx9s@163.com。

中图分类号: TU443
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出版历程
- 收稿日期: 2011-06-12
- 发布日期: 2012-07-24

Pore pressure and strain development of Wenzhou saturated soft soil under cyclic loading by stages

(1. Architecture and Civil Engineering College, Wenzhou University, Wenzhou 325027, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310027, China)

摘要

摘要: 土体在经过一定次数的循环荷载作用后，其动力特性会发生改变，对后续振动的响应会变得大不相同。通过对温州原状饱和软黏土分别在不排水和排水条件下进行连续循环加载和5个阶段的分阶段循环加载试验，分析了循环荷载作用及一定时间的停振对土体动力特性的影响。试验结果表明，一定时间的振动和停振后，由于土体动力特性发生了改变，后续阶段的残余应变将变小；不排水条件下，停振期孔压稳定在循环加载产生的残余孔压值附近，而振动期产生的变形一部分得到恢复；排水条件下，在振动期孔压呈现出先增大后减小的趋势，在停振期残余应变基本保持不变。这些结论对于深入分析交通荷载下土体动力响应和沉降发展具有一定的指导意义。
- 排水条件 /
- 分阶段加载 /
- 停振期 /
- 孔压 /
- 残余应变
Abstract: After a certain number of traffic loads, soil dynamic characteristics are changed, which makes the response of the next cyclic loading different. Through the successive cyclic loading and 5-stage loading tests on Wenzhou saturated soft soil under undrained and drained conditions separately, the effects of post-cyclic loading with no vibration for a certain time on the soil dynamic characteristics are analyzed. The experimental results show that after a certain time of cyclic loading with no vibration, the cumulative strain is reduced because of the change of soil dynamic behaviors; under undrained conditions, the pore pressure is stable at the value of cumulative pore pressure generated by cyclic loading and part of strain generated by cyclic loading resumes; under drained conditions, the pore pressure firstly increases and then decreases at the stage of cyclic loading while the cumulative strain keeps mostly unchangeable. The conclusions should be helpful for in-depth analysis of the dynamic response and settlement development of soil under traffic loading.
- drainage condition /
- cyclic loading by stages /
- no vibration time /
- pore pressure /
- cumulative strain

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参考文献(13)

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