Abstract
Large-scale model tests were performed to examine the earth pressure on walls retaining geogrid reinforced sand with EPS blocks installed immediately behind the wall. Five tests were conducted with different configurations of EPS blocks and geogrid placement in Toyoura sand of Dr=75%. It is found that EPS blocks installed immediately behind the wall reduces the earth pressure at rest, and also that the use of EPS blocks installed immediately behind the wall combined with geogrid reinforcement connected rigidly to EPS blocks reduces the active earth pressure.
