Numerical analysis of multi layer geosynthetic-reinforced granular bed over soft fill

Deb, Kousik, Sivakugan, N., Chandra, Sarvesh, and Basudhar, P.K. (2007) Numerical analysis of multi layer geosynthetic-reinforced granular bed over soft fill. Geotechnical and Geological Engineering, 25 (6). pp. 639-646.

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Abstract

In this paper, considering the plain strain conditions, a numerical study has been conducted to investigate the behavior of multi layer geosynthetic-reinforced granular bed overlying a soft soil using the Fast Lagrangian Analysis of Continua (FLAC) program. The granular fill, soft soil, and geosynthetic reinforcements are considered as linear elastic materials. The geosynthetic reinforcements are modeled as cable elements fully bonded with the surrounding soil, thus neglecting any slip. The results obtained from the present investigation showed very close agreement when compared with the results of finite element analysis and lumped parameter modeling. The distribution of vertical, lateral and shear stresses in the soil are greatly affected as the number of reinforcement layers is increased. If the tensile stiffness of geosynthetic layers increases and its value is no more than 4,000–5,000 kN/m, the settlement of the reinforced foundation decreases significantly. The reduction in settlement is insignificant when the tensile strength of the geosynthetics exceed the above value.

Item ID: 2843
Item Type: Article (Refereed Research - C1)
Keywords: geosynthetic; FLAC; winkler springs; reinforced earth; numerical model; soft soil
Additional Information:

ISSN: 1573-1529
Date Deposited: 24 Sep 2009 22:53
FoR Codes: 09 ENGINEERING > 0999 Other Engineering > 099999 Engineering not elsewhere classified @ 100%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%
Citation Count from Scopus Scopus 5
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