Liquefaction Resistance of Desaturated and Partly Saturated Clean Sand

Chavan, D and Sitharam, TG and Anbazhagan, P (2021) Liquefaction Resistance of Desaturated and Partly Saturated Clean Sand. In: 7th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, ICRAGEE 2020, 13-16 Jul 2020, Bengaluru; India, pp. 171-180.

PDF LNCE_119_2021.pdf - Published Version Restricted to Registered users only Download (327kB)

Abstract

Induced desaturation has been emerging as a new liquefaction mitigation technique. Laboratory study carried out, so far, on induced desaturation has mainly focused on shaking table and centrifuge studies. In the present study, triaxial specimens of saturated clean sand have been desaturated by injecting air/CO2 into it and stress-controlled undrained cyclic triaxial tests have been conducted on such samples. Few tests have been conducted on partly saturated samples as well. It is observed that the presence of air in the sample increases the liquefaction resistance of the sand. Further, desaturation affected not only liquefaction resistance but also dilative and contractive tendency of the soil. Slope of the phase transformation line on compression side initially increased and then decreased with reduction in degree of saturation whereas slope of phase transformation line on extension side initially decreased and then increased with reduction in the degree of saturation. In most of the cases, slope of the phase transformation line on extension side is found to be smaller than that on compression side. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Item Type:	Conference Paper
Publication:	Lecture Notes in Civil Engineering
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Keywords:	Earthquake engineering; Geotechnical engineering; Soil mechanics; Soils; Supersaturation, Contractive tendency; Degree of saturations; Laboratory studies; Liquefaction resistance; Mitigation techniques; Partly saturated; Phase transformation line; Undrained cyclic triaxial test, Soil liquefaction
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	25 Aug 2021 09:52
Last Modified:	25 Aug 2021 09:52
URI:	http://eprints.iisc.ac.in/id/eprint/69364

Actions (login required)

View Item