Numerical Solution of Non-Limit Active Earth Pressure with Wall Movement of Rotation About the Top
摘要
Rigid retaining walls, when limited at the top, often exhibit a displacement mode characterized by rotation around the top. This mode presents a challenge to the calculation of earth pressure because of variations in the non-limit state of the soil at different depths. Based on existing research, this study derives a functional relationship between soil strength parameters and wall displacement applicable to the rotation mode around the top of the wall. Assuming that the soil behind the wall forms a circular arch, and that the slip surface is a logarithmic spiral surface, the soil behind the wall is horizontally layered with small step lengths, and a numerical iterative format for the non-limit active earth pressure under the rotation mode around the top of the wall can be constructed, providing a numerical calculation method for the non-limit active earth pressure in this mode. Comparing the numerical solution with model test results reveals that the calculation based on this solution aligns closely with the test results. This provides a more accurate solution for non-limit active earth pressure when the rigid retaining wall rotates around the top, and has practical guiding value for the design of such retaining walls.