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Studies on scaling and instrumentation of a geogrid

DSpace at IIT Bombay

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Title Studies on scaling and instrumentation of a geogrid
 
Creator VISWANADHAM, BVS
KONIG, D
 
Subject geotechnical centrifuge
rectangular footings
bearing capacity
reinforced sand
geosynthetics
modeling
similitude
instrumentation
centrifuge model tests
 
Description The scaling down of geosynthetic materials is essential in small-scale physical modeling studies in order to obtain the correct response of prototype structure. In this paper, similitude conditions concerning modeling of geosynthetic materials in Ig and Ng conditions are examined with an emphasis on geogrids. In order to model soil-geosynthetic behavior satisfactorily, it was observed that there is a substantial requirement of modeling geosynthetic materials for studies pertaining to the behavior of reinforced soil structures. Secondly, one of the selected model geogrids was instrumented with special type of tiny strain gauges adhered to base material formed with strengthened epoxy adhesive and calibrated. Guidelines are presented for selecting scaled-down geogrids along with demonstration of an application through a centrifuge model test on geogrid reinforced clay liner and calibration aspects of the model geogrid. The geogrid layer was used as a reinforcement inclusion within the model clay liner subjected to non-uniform settlements in a geotechnical centrifuge. The results indicated that the model geogrid is required to be calibrated several times by loading and unloading cycles till a reproducible response is accomplished. The measured tensile strength and observations made during the centrifuge test were reported. The results revealed that the strain Gauges can be used to measure in-plane tensile strength characteristics of embedded geogrid within the soil, however the influence of base material on the tensile strength-strain behavior of the aeogrid need to be considered. (C) 2003
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-22T14:27:16Z
2011-12-26T12:52:27Z
2011-12-27T05:38:03Z
2011-07-22T14:27:16Z
2011-12-26T12:52:27Z
2011-12-27T05:38:03Z
2004
 
Type Article
 
Identifier GEOTEXTILES AND GEOMEMBRANES, 22(5), 307-328
0266-1144
http://dx.doi.org/10.1016/S0266-1144(03)00045-1
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6259
http://hdl.handle.net/10054/6259
 
Language en