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Centrifuge model tests on the behavior of strip footing on geotextile-reinforced slopes

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Title Centrifuge model tests on the behavior of strip footing on geotextile-reinforced slopes
 
Creator SOMMERS, AN
VISWANADHAM, BVS
 
Subject soil slopes
embankments
walls
sand
performance
failure
geosynthetics
reinforced slope
centrifuge modeling
model tests
strip footing
image analysis
 
Description This paper examines the stability of geotextile-reinforced slopes when subjected to a vertical load applied to a strip footing positioned close to the slope crest. Vertical spacing between geotextile reinforcement was varied while maintaining a constant slope angle, load position, soil density and geotextile type. Small-scale physical tests were conducted using a large beam centrifuge to simulate field prototype conditions. After the model was accelerated to 40g, a load was applied to the strip footing until slope failure occurred. Digital image analysis was performed, using photographs taken in-flight, to obtain slope displacements and strain distribution along the reinforcement layers at different loading pressures during the test and at failure. Stability analysis was also conducted and compared with centrifuge model test results. The vertical spacing between reinforcement layers has a significant impact on the stability of a reinforced slope when subjected to a vertical load. Less vertical distance between reinforcement layers allows the slope to tolerate much greater loads than layers spaced further apart. Distributions of peak strains in reinforcement layers due to the strip footing placed on the surface of the reinforced slope were found to extend up to mid-height of the slope and thereafter they were found to be negligible. Stability analysis of the centrifuge models was found to be consistent with the observed performance of geotextile-reinforced slopes subjected to loading applied to a strip footing near the crest. (C) 2009
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-21T22:16:31Z
2011-12-26T12:52:11Z
2011-12-27T05:39:14Z
2011-07-21T22:16:31Z
2011-12-26T12:52:11Z
2011-12-27T05:39:14Z
2009
 
Type Article
 
Identifier GEOTEXTILES AND GEOMEMBRANES, 27(6), 497-505
0266-1144
http://dx.doi.org/10.1016/j.geotexmem.2009.05.002
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6011
http://hdl.handle.net/10054/6011
 
Language en