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• W2883941770 abstract "Disposal of waste material like pond ash is a major concern to environment. One ofthe possible applications of this type of waste material is to utilize them as backfillmaterial in reinforced earth structures. To proper design of any reinforced earthstructure, soil reinforcement interactions are important where shear and pullout arethe most common internal failure modes. Pullout parameters have an important rolein design of reinforced earth structure and to determine these parameters pullout testhas been carried out at different samples.In this study it is proposed to use pond ash and sand as a backfill material so, thisstudy is carried out to determine the axial pullout resistance of smooth metal stripreinforcement and geogrids. Pond ash from Narla Tarato thermal plant, Vijaywada,Andhra Pradesh has been used. Here, a new test method has been developed namedas staged pullout test (SPOT) where a model ground can be tested for two or morethan two normal stress conditions. SPOT has advantage over conventional pullouttest (CPOT) because CPOT requires three or more model ground to get the pulloutproperties and it is very difficult to maintain same properties for each model groundwhile for SPOT only one ground has been used to get the pullout properties. In theSPOT, normal loads are in staged condition or changing the normal load afterstopping the test when pullout displacement reaches to 20 mm. In order toinvestigate the SPOT method, both CPOT and SPOT have been performed on thesame model ground and results have been compared. From the comparison, SPOTresults of smooth metal strip reinforcement were found to be closer with CPOTresults for 17 kPa and 52 kPa while for 87 kPa SPOT results can be used with afactor of safety of 1.2. It has been also observed that SPOT results producecomparable results with CPOT for first 20 mm displacement irrespective of thereinforcement. For geogrids, logarithmic fitted test results are differ by less than10% for first 20 mm displacement and 15-20% for remaining displacement up to 60mm. The percentage change for logarithmic fitted results is going to higher whenmoving to higher normal stress conditions. So, SPOT method could be used insteadof CPOT with a factor of safety of 1.2 to 1.3. From the results, SPOT has aprobability to be used as a new pullout test method instead of CPOT." @default.
• W2883941770 created "2018-08-03" @default.
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• W2883941770 date "2018-01-01" @default.
• W2883941770 modified "2023-09-22" @default.
• W2883941770 title "Staged Pullout Testing of Extensible and InextensibleReinforcements" @default.
• W2883941770 hasPublicationYear "2018" @default.
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