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Bearing capacity of circular footing on geocell-sand mattress overlying clay bed with void

Sireesh, S and Sitharam, TG and Dash, Sujit Kumar (2009) Bearing capacity of circular footing on geocell-sand mattress overlying clay bed with void. In: Geotextiles and Geomembranes, 27 (2). pp. 89-98.

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Abstract

The potential benefits of providing geocell reinforced sand mattress over clay subgrade with void have been investigated through a series of laboratory scale model tests. The parameters varied in the test programme include, thickness of unreinforced sand layer above clay bed, width and height of geocell mattress, relative density of the sand fill in the geocells, and influence of an additional layer of planar geogrid placed at the base of the geocell mattress. The test results indicate that substantial improvement in performance can be obtained with the provision of geocell mattress, of adequate size, over the clay subgrade with void. In order to have beneficial effect, the geocell mattress must spread beyond the void at least a distance equal to the diameter of the void. The influence of the void over the performance of the footing reduces for height of geocell mattress greater than 1.8 times the diameter of the footing. Better improvement in performance is obtained for geocells filled with dense soil. (C) 2008 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Model test;Bearing capacity;Circular footing;Geocell reinforcement;Layered soil;Underground void.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 04 May 2009 11:04
Last Modified: 19 Sep 2010 05:30
URI: http://eprints.iisc.ernet.in/id/eprint/19804

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