无锡地区不同埋深粉质黏土加载流变试验研究

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (10): 1563-1569.

无锡地区不同埋深粉质黏土加载流变试验研究

丁文其1,2，王春波1,2，王军3

（1. 同济大学地下建筑与工程系，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； 3. 无锡市轨道交通发展有限公司，江苏无锡 214013）

收稿日期:2011-08-03 出版日期:2012-10-30 发布日期:2012-10-30
基金资助:
国家自然科学基金(50878149)，教育部新世纪优秀人才支持计划(NCET080402)，无锡市科技计划项目 (092167)资助

Research of Loading-Rheological Test on WUXI Silty Clay Buried in Different Depth

DING Wen-Qi-1, 2 , WANG Chun-Bo-1, 2 , WANG Jun-3

（1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. Rail Transit Development Co. Ltd, Wuxi 214013, Jiangsu, China)

Received:2011-08-03 Online:2012-10-30 Published:2012-10-30

摘要/Abstract

摘要： 针对无锡地区③2层、⑥2层粉质黏土，通过设置主应力轴位于水平方向和竖直方向，研究分析不同埋深粉质黏土在不同固结方式、加载方式下的流变特性，并推导了三轴应力状态下的广义Kelvin模型和Burgers模型流变方程，以Burgers模型对试验结果进行了拟合，拟合效果较好.研究分析表明：埋深相同的粉质黏土流变变形速率随偏应力的增加而增大，但当偏应力增加到一定值时流变时间很短，没有流变变形保持阶段；相同类型的土体，埋深较大的流变变形速率、流变阈值较大，流变变形趋于稳定的时间较短；受土体各向异性的影响，流变模型参数随加载方式的不同而不同，但各模型参数均随围压的增加而增大.

关键词: 粉质黏土, 流变特性, 固结方式, 加载方式, Burgers模型

Abstract: Studies on rheological properties of silty clay buried in different depth under different consolidation method and different loading method by setting the principal stress axes in the horizontal and vertical direction were carried out subject to ③2 layer silty clay and ⑥2 layer silty clay in WUXI district, and the rheological equation of generalized Kelvin model and Burgers model under triaxial stress state was derived. The test results fit very well with Burgers model. The test shows that the rheological deformation rate of silty clay buried in the same depth increases with the increase of deviatoric stress, but when the deviatoric stress increases to a certain value, the rheological time is very short and does not maintain the phase of rheological deformation. The rate of rheological deformation and rheological threshold are bigger than that of depth smaller, and the time of rheological deformation to stability is shorter for the same type of soil. By the influence of soil anisotropy, the rheological model parameters vary with the different loading modes, but the model parameters increase with increasing confining pressure.

Key words: silty clay, rheological properties, consolidation method, loading method, Burgers model

中图分类号:

TU 47

丁文其1, 2, 王春波1, 2, 王军3. 无锡地区不同埋深粉质黏土加载流变试验研究[J]. 上海交通大学学报（自然版）, 2012, 46(10): 1563-1569.

DING Wen-Qi-1, 2 , WANG Chun-Bo-1, 2 , WANG Jun-3. Research of Loading-Rheological Test on WUXI Silty Clay Buried in Different Depth[J]. Journal of Shanghai Jiaotong University, 2012, 46(10): 1563-1569.

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