• Ariba Shafi
• Ankaj Minhas

Abstract : Laboratory model tests for the determination of ultimate bearing capacity of square foundations supported by multi layered geogrid reinforcement have been presented. The present study aims at investigation of the enhancement in the bearing capacity of a poorly graded sand by placing triaxial Geogrids (TX160) at different depths. In the present study, the number of geogrid layers used and the distance between various geogrid layers is varied and the optimum number of geogrid layers and optimum distance is determined. Different model tests were being performed on a square footing resting on the top of the soil reinforced with geogrid to establish the load versus settlement curves of unreinforced and reinforced soil. The model tests have been conducted using square model footing made of mild steel plate with dimensions 10×10×2.5 cm. The average relative density to be adopted throughout all the tests is 65%.The results show that on addition of geogrid to the sand below foundation, the ultimate bearing capacity of foundation was increased and the settlement was decreased. It was also observed that the ultimate bearing capacity depends on the number of geogrid layers and the spacing between geogrid layers. The optimum number of geogrid layers obtained from the laboratory testing is 3 and the optimum distance between the layers of reinforcement used is 0.5 times the width of footing.

Bearing capacity, settlement, geogrid.

"Use of triaxial geogrid to study the improvement in bearing capacity of sand.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.756-761, June 2019, Available :http://www.jetir.org/papers/JETIR1907N02.pdf

"Use of triaxial geogrid to study the improvement in bearing capacity of sand.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp756-761, June 2019, Available at : http://www.jetir.org/papers/JETIR1907N02.pdf