Study of earth pressure of prestressed anchor pile considering soil arching

According to design principles of point anchor and frame anchor technology, a new earth pressure calculation method based on three-dimensional soil arching effect is proposed in order to solve computation model of earth pressure problem of the prestressed anchor pile design. Based on this, earth pressure exerted on pile and plate is derived by the limit equilibrium theory of soil slice. Secondly, a first-order linear differential equation and earth pressure distribution curve along the axis of the pile is established. Finally, distribution of earth pressure was compared with the calculation results of the Specifications of design for geological hazard stabilization[1] and the Technical code for building slope engineering[3] for different parameters φ and δ. The results show that the earth pressure distribution curve exerted on pile and plate along the axis of the pile plate is serrated and its value much less than code. Variation in parameter δ has a significant effect on the earth pressure and should not be overlooked in engineering design. Considering soil arching effects is more consistent with engineering mechanical characteristics.