Lateral Earth Pressure acting on Anchored Retention Walls installed in Cut Slope

In order to utilize more effectively construction site for apartment, road, infrastructures, and so on, the excavation works are being performed in slope areas. In this case, the anchored retention walls mainly are selected due to slope soil behind the walls and unsymmetrical excavation section. An instrumentation system has been installed at the anchored retention walls in slope soil to estimate the lateral earth pressure acting on anchored walls. As a result of measurement, the earth pressure diagram acting on anchored walls is developed approximately a trapezoid. The maximum earth pressure considering surcharge load of slope soil is equal to Rankine's active earth pressure and is 0.4 times of vertical overburden pressure, and the large earth pressure at upper part of the walls acts considerably. The measured earth pressures are larger than empirical earth pressure proposed by Terzaghi and Peck and Tschebotarioff. The sliding mass in slope soil behind the walls is larger than the sliding mass of plastic equilibrium condition proposed by Rankine. It knows that the sliding force in slope soil behind walls is increased with decreasing the passive earth pressure due to excavation.