New progress in the study of intergranular suction and shear strength of unsaturated soil

The suction between soil particles is the basis and core problem in the study of unsaturated soil. However, is the suction between soil particles just the matrix suction (which has been widely used since the discipline of unsaturated soil mechanics was established). In fact, the concept of matrix su...

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Main Authors:	Liansheng, Tang, Haitao, Sang, Liqun, Jiang, Yinlei, Sun
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2016
Online Access:	http://journalarticle.ukm.my/9580/ http://journalarticle.ukm.my/9580/ http://journalarticle.ukm.my/9580/1/18_Liansheng_Tang.pdf

id	ukm-9580
recordtype	eprints
spelling	ukm-95802016-12-14T06:50:21Z http://journalarticle.ukm.my/9580/ New progress in the study of intergranular suction and shear strength of unsaturated soil Liansheng, Tang Haitao, Sang Liqun, Jiang Yinlei, Sun The suction between soil particles is the basis and core problem in the study of unsaturated soil. However, is the suction between soil particles just the matrix suction (which has been widely used since the discipline of unsaturated soil mechanics was established). In fact, the concept of matrix suction is from soil science and reflects the water-absorbing capacity of the soil. Matrix suction characterizes the interaction between soil particles and pore water rather than the interactions between soil particles, which were not in conformity with the principle of effective stress of soils. The suction of unsaturated soil, in essence, is the intergranular suction composed of absorbed suction and structural suction. In this paper, first, the basic concepts of absorbed suction and structural suction were briefly introduced. Then, with soil mechanics, powder science, crystal chemistry, granular material mechanics and other related disciplines of knowledge for reference, the quantitative calculation formulas were theoretically deduced for the absorbed suction for equal-sized and unequal-sized unsaturated soil particles with arbitrary packing and the variable structural suction for equal-sized unsaturated soil particles with arbitrary packing and unequal-sized unsaturated soil particles with close tetrahedral packing. The factors that influence these equations were discussed. Then, the shear strength theory of unsaturated soil was established based on the theory of intergranular suction through the analysis of the effective stress principle of unsaturated soil. This study demonstrates that the shear strength of unsaturated soil consists of three parts: The effective cohesive force, the additional strength caused by external loads and the strength caused by intergranular suction. The contribution of the three parts to the shear strength of unsaturated soil depends on the following influence factors: Soil type, confining pressure, water content and density. Therefore, these factors must be comprehensively considered when determining the strength of an unsaturated soil. Universiti Kebangsaan Malaysia 2016-01 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/9580/1/18_Liansheng_Tang.pdf Liansheng, Tang and Haitao, Sang and Liqun, Jiang and Yinlei, Sun (2016) New progress in the study of intergranular suction and shear strength of unsaturated soil. Sains Malaysiana, 45 (1). pp. 141-156. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol45num1_2016/contentsVol45num1_2016.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The suction between soil particles is the basis and core problem in the study of unsaturated soil. However, is the suction between soil particles just the matrix suction (which has been widely used since the discipline of unsaturated soil mechanics was established). In fact, the concept of matrix suction is from soil science and reflects the water-absorbing capacity of the soil. Matrix suction characterizes the interaction between soil particles and pore water rather than the interactions between soil particles, which were not in conformity with the principle of effective stress of soils. The suction of unsaturated soil, in essence, is the intergranular suction composed of absorbed suction and structural suction. In this paper, first, the basic concepts of absorbed suction and structural suction were briefly introduced. Then, with soil mechanics, powder science, crystal chemistry, granular material mechanics and other related disciplines of knowledge for reference, the quantitative calculation formulas were theoretically deduced for the absorbed suction for equal-sized and unequal-sized unsaturated soil particles with arbitrary packing and the variable structural suction for equal-sized unsaturated soil particles with arbitrary packing and unequal-sized unsaturated soil particles with close tetrahedral packing. The factors that influence these equations were discussed. Then, the shear strength theory of unsaturated soil was established based on the theory of intergranular suction through the analysis of the effective stress principle of unsaturated soil. This study demonstrates that the shear strength of unsaturated soil consists of three parts: The effective cohesive force, the additional strength caused by external loads and the strength caused by intergranular suction. The contribution of the three parts to the shear strength of unsaturated soil depends on the following influence factors: Soil type, confining pressure, water content and density. Therefore, these factors must be comprehensively considered when determining the strength of an unsaturated soil.
format	Article
author	Liansheng, Tang Haitao, Sang Liqun, Jiang Yinlei, Sun
spellingShingle	Liansheng, Tang Haitao, Sang Liqun, Jiang Yinlei, Sun New progress in the study of intergranular suction and shear strength of unsaturated soil
author_facet	Liansheng, Tang Haitao, Sang Liqun, Jiang Yinlei, Sun
author_sort	Liansheng, Tang
title	New progress in the study of intergranular suction and shear strength of unsaturated soil
title_short	New progress in the study of intergranular suction and shear strength of unsaturated soil
title_full	New progress in the study of intergranular suction and shear strength of unsaturated soil
title_fullStr	New progress in the study of intergranular suction and shear strength of unsaturated soil
title_full_unstemmed	New progress in the study of intergranular suction and shear strength of unsaturated soil
title_sort	new progress in the study of intergranular suction and shear strength of unsaturated soil
publisher	Universiti Kebangsaan Malaysia
publishDate	2016
url	http://journalarticle.ukm.my/9580/ http://journalarticle.ukm.my/9580/ http://journalarticle.ukm.my/9580/1/18_Liansheng_Tang.pdf
first_indexed	2023-09-18T19:55:17Z
last_indexed	2023-09-18T19:55:17Z
_version_	1777406488128520192

New progress in the study of intergranular suction and shear strength of unsaturated soil

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