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Experimental study of unreinforced and reinforced soil retaining wall using shake table facility

This paper highlights the shake table tests carried out on a conventional soil retaining wall model and a reinforced soil retaining wall model in the laboratory. The soil used for this study was mixed soil or c-ф soil. The models for the test setup made in a laminar box and mounted on shake table with instrumental connections. The observations and results of the tests are given in detail. Two soil retaining wall models were constructed: one without reinforcement and the other with reinforcement and were provided with four horizontal acceleration values- 60, 75, 90 and 120 rpm. Jute blanket with latex was used as the reinforcement material for the model. It was observed that settlement in height for the reinforced model was very negligible compared to the unreinforced model. The acceleration, velocity and displacement values obtained at the position where accelerometers were fit very less for the reinforced model. The test results show that the acceleration, velocity and displacement for conventional retaining wall model are amplified with notable ratios. The seismic horizontal coefficients were calculated to find out maximum reinforcement force with respect to slope of the wall and seismic vertical coefficient. Comparison between the two studies showed the reinforced structure is strong enough to withstand any seismic activity below 120 rpm frequency. The amplification ratio compared to establish the efficiency of the reinforced structure over the unreinforced within a specified range of seismic frequency.