1. Nanjing Hydraulic Research Institute, Nanjing 210029, China;
2. Key Laboratory of Water Science and Hydraulic Engineering of MWR, Nanjing 210029, China;
3. R & D Center of Hydro-Power Engineering Safety and Environmental Technology of NEA, Nanjing 210029, China
Abstract：A new dimensionless parameter, embedding ratio, was proposed. The working and failure mechanisms of the stabilizing pile and their evolutions were studied by gradually changing the location of slip surface from pile top to pile bottom, and four failure modes of stabilizing pile were suggested. Model tests indicate that there are four failure modes of stabilizing pile rather than three modes as proposed by Viggiani. Based on the plasticity theory, analytical solutions of ultimate lateral resistance on rigid stabilizing pile and discrimination boundaries of the four failure modes are obtained, and all of them can be expressed by the new dimensionless embedding ratio. For arbitrary slip surfaces, the failure of the stabilizing pile can be described by the four failure modes. The results show that the failure mode of the stabilizing pile is dominated by the relative location of the slip surface. Consequently, the working mechanism of the same stabilizing pile shall be different provided that the slip surface is different, the corresponding ultimate lateral resistance shall be quite different as well, and the suggested calculation methods of ultimate lateral resistance may be employed for common analysis and design of slope stability.
