Quantitative benefits of geocells in controlling liquefaction in sands

Krishnaraj, P and Latha, GM (2024) Quantitative benefits of geocells in controlling liquefaction in sands. In: Soil Dynamics and Earthquake Engineering, 188 .

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Abstract

Geocells have become an integral part of many geosystems like road and railway embankments, retaining walls and foundations, attributed to their multiple merits in terms of stability and strength, but their contributions towards liquefaction mitigation are unknown. The present study aims to understand the role of geocell reinforcement on the liquefaction and post-liquefaction shear response of saturated sands through monotonic and cyclic triaxial tests. Low-strength geocells of required physical and mechanical properties were fabricated through ultrasonic welding of 3D printed polypropylene (PP) sheets. The liquefaction benefits of including a single geocell in sand were quantified in terms of the reduction in pore water pressure, retardation in stiffness degradation and delay in the retardation of effective stress. In general, the inclusion of geocells delayed liquefaction, with higher beneficial effects at lower initial confining pressure, higher cyclic strain amplitude and higher cyclic loading frequency. The maximum benefit measured in terms of percentage rise in the number of cycles needed to liquefy was calculated to be about 230 . Geocell reinforcement also helped in the quick regain of post-liquefaction shear strength and stiffness. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Soil Dynamics and Earthquake Engineering
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Cyclic loads; Pore pressure; Regain; Shear strength, 3-D printing; 3D-printing; Cyclic loading; Geocell reinforcement; Geocells; Geosystems; Integral part; Post-liquefaction; Quantitative benefits; Road embankments, Ultrasonic welding, amplitude; confining pressure; cyclic loading; embankment; foundation; geosynthetics; liquefaction; pore pressure; porewater; quantitative analysis; railway construction; retaining wall; sand; saturated medium; shear strength; soil reinforcement; stiffness; three-dimensional modeling; triaxial test; ultrasonics
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	12 Dec 2024 18:08
Last Modified:	12 Dec 2024 18:08
URI:	http://eprints.iisc.ac.in/id/eprint/87012

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