Experimental study of two saturated natural soils and their saturated remoulded soils under three consolidated undrained stress paths

doi:10.1007/s11709-011-0108-8

Frontiers of Architecture and Civil Engineering in China

2011, Vol. 5

Issue (2): 225-238 https://doi.org/10.1007/s11709-011-0108-8

RESEARCH ARTICLE

本期目录

Experimental study of two saturated natural soils and their saturated remoulded soils under three consolidated undrained stress paths

Mingjing JIANG¹(

), Haijun HU¹, Jianbing PENG², Serge LEROUEIL³

1. Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. School of Geological Engineering and Surveying, Chang’an University, Xi’an 710054, China; 3. Department of Civil Engineering, Laval University, Quebec G1K 7P4, Canada

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Abstract：

In this paper, an experimental investigation is conducted to study the mechanical behavior of saturated natural loess, saturated natural filling in ground fissure and their corresponding saturated remoulded soils under three consolidated undrained triaxial stress tests, namely, conventional triaxial compression test (CTC), triaxial compression test (TC) and reduced triaxial compression test (RTC). The test results show that stress-strain relation, i.e. strain-softening or strain-hardening, is remarkably influenced by the structure, void ratio, stress path and confining pressure. Natural structure, high void ratio, TC stress path, RTC stress path and low confining pressures are favorable factors leading to strain-softening. Excess pore pressure during shearing is significantly affected by stress path. The tested soils are different from loose sand on character of strain-softening and are different from common clay on excess pore water pressure behavior. The critical states in p′– q space in CTC, TC and RTC tests almost lie on one line, which indicates that the critical state is independent of the above stress paths. As for remoulded loess or remoulded filling, the critical state line (CSL) and isotropic consolidation line (ICL) in e-log p′ space are almost straight, while for natural loess or natural filling, in e-log p′ space there is a turning point on the CSL, which is similar to the ICL.

Key words： stress paths static liquefaction natural soil remoulded soil loess structure total strength indices excess pore pressure

收稿日期: 2011-03-03 出版日期: 2011-06-05

Corresponding Author(s): JIANG Mingjing,Email:mingjing.jiang@tongji.edu.cn

引用本文:

. Experimental study of two saturated natural soils and their saturated remoulded soils under three consolidated undrained stress paths[J]. Frontiers of Architecture and Civil Engineering in China, 2011, 5(2): 225-238.
Mingjing JIANG, Haijun HU, Jianbing PENG, Serge LEROUEIL. Experimental study of two saturated natural soils and their saturated remoulded soils under three consolidated undrained stress paths. Front Arch Civil Eng Chin, 2011, 5(2): 225-238.

链接本文:

https://academic.hep.com.cn/fsce/CN/10.1007/s11709-011-0108-8
https://academic.hep.com.cn/fsce/CN/Y2011/V5/I2/225

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