Interference effect of shallow foundations constructed on sand reinforced with geosynthetics

Bearing capacity; Footing interference; Sand; Shallow foundation; Soil reinforcement; Design charts; GEO grid; Geogrid layers; Geosynthetics; Interference effects; Maximum bearing capacity; Mohr-Coulomb criterion; Non-associated flow rule; Numerica l results; Parametric studies; Reinforcement layers; Sandy soils; Shallow foundations; Square footings; Materials Science (all); Geotechnical Engineering and Engineering Geology; General Materials Science; Civil and Structural Engineering

Abstract :

[en] This paper numerically examines the bearing capacity ratio for rough square footings located at the surface of a homogeneous sandy soil reinforced with a geogrid. The failure stage in the sand was controlled using the Mohr-Coulomb criterion and a non-associated flow rule. Numerical results were compared with those obtained from other experiments and were found to be in good agreement. A parametric study revealed the role of the distance between reinforcing layers and footings and the width and depth of reinforcing layers on the bearing capacity. The distribution of shear strain and displacement in the soil for both reinforced and unreinforced footings was investigated. In short, the results showed that the bearing capacity of interfering footing increases with the use of geogrid layers, depending on the distance between two footings. The best geometry and orientation of the geogrid layers were determined to achieve maximum bearing capacity for closely spaced square footings. Parametric studies demonstrated that the efficiency of reinforcement on the bearing capacity of interfering footings is greater than that on an isolated reinforced footing. In addition, reinforcement caused the bearing capacity of interfering footings to increase by about 1.5 and 2 for one and two reinforcement layers, respectively. Design charts are presented. © 2008 Elsevier Ltd. All rights reserved.

Disciplines :

Civil engineering

Author, co-author :

Ghazavi, Mahmoud; Civil Engineering Department, K.N. Toosi University of Technology, Tehran, Iran

ALIMARDANI LAVASAN, Arash ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)

External co-authors :

yes

Language :

English

Title :

Interference effect of shallow foundations constructed on sand reinforced with geosynthetics

Publication date :

October 2008

Journal title :

Geotextiles and Geomembranes

ISSN :

0266-1144

Publisher :

Elsevier BV

Volume :

Issue :

Pages :

404 - 415

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://api.elsevier.com/content/article/PII:S0266114408000095?httpAccept=text/xml

Available on ORBilu :

since 10 January 2024

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157

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139

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122

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