黏性土一维松弛及其与次压缩的关系

高彦斌; 刘佳丹

doi:10.11779/CJGE2019S2013

黏性土一维松弛及其与次压缩的关系 English Version

高彦斌^{1, 2, ,},
刘佳丹^{1, 2}

1. 同济大学土木工程学院地下建筑与工程系,上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海200092

详细信息

作者简介:
高彦斌(1973— ),男,副教授,博士生导师,主要从事软土力学特性和软土工程方面的研究工作。E-mail: yanbin_gao@tongji.edu.cn。

通讯作者:
高彦斌，E-mail：yanbin_gao@tongji.edu.cn

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出版历程
- 收稿日期: 2019-04-27
- 发布日期: 2019-07-19

One-dimensional stress relaxation of cohesive soils and its relationship with secondary compression

GAO Yan-bin^{1, 2, ,},
LIU Jia-dan^{1, 2}

1. Department of Geotechnical Engineering College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 国内外学者对一维松弛规律进行了丰富的研究,但推导过程较为复杂。基于Buisman次压缩方程,结合Bjerrum提出的等时间压缩线的概念,采用一个简单的方法推导得出了双对数形式和单对数形式的一维应力松弛公式。给出了这两种形式的应力松弛关系曲线的斜率与参数c_a/c_c之间的关系,其中c_a为次压缩指数,c_c为压缩指数。并采用上海黏土进行了一维次压缩和松弛试验,验证了这两种形式的应力松弛关系的可靠性。最后还根据Mesri and Godlewski给出的c_a/c_c的范围,预估了一般黏性土的一维应力松弛速率。
- 黏性土 /
- 应力松弛 /
- 次压缩 /
- 一维压缩
Abstract: The behaviors of one-dimensional relaxation have been studied by many researchers. However, the method for deducing the stress relax formulas is usually complicated. Two simple stress relaxation formulas in single-logarithmic form and double-logarithmic form are derived, which are based on the Buisman secondary compression equation and the concept of the equal-time compression line proposed by Bjerrum. The relationships between the slopes of these two types of stress relaxation formulas and the parameter c_a/c_c are proposed, here c_a is the secondary compression index and c_cis the compression index. One-dimensional secondary compression and the stress relaxation tests using Shanghai clay are conducted. The reliability of the stress relaxation formulas is verified. Moreover, the one-dimensional stress relaxing rate of general cohesive soils is estimated according to the values of c_a/c_c proposed by Mesri and Godlewski.
- cohesive soil /
- stress relaxation /
- secondary compression /
- one-dimensional compression

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参考文献(8)

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