A new earth pressure expression is derived to calculate the earth pressure on the shotcrete of flexible retaining method with prestressed anchor in order to solve the computation model of earth pressure on the shotcrete in the anchor shotcrete support design on the base of two-dimensional soil arch. And the distribution of earth pressure on the shotcrete along the depth is established. The values of earth pressure from this paper are compared with those calculated by silo method from the Specifications of design for geological hazard stabilization for different soil parameters

such as soil cohesion

soil internal friction angle

soil-shotcrete friction angle and horizontal distance between the adjacent anchors. The results show that the earth pressure on the shotcrete increases with decreasing ; and values are greater than those calculated by silo method for a small . The maximum earth pressure is proportional to while has no effect on the maximum earth pressure. Variation in parameter has a significant effect on the earth pressure and should not be neglected for engineering design because of the contribution for decreasing the earth pressure on the shotcrete. Finally

a simplified expression for calculating earth pressure on shotcrete is provided.