Analysis and optimization of anti-slide pile design parameter in combined retaining structure

The calculation method of stability coefficients of the combined retaining structure (CRS) was proposed, and the numerical model was built based on practicalproject of CRS. Compared with other two types of retaining structure, the advantages of the CRS were explicated. Meanwhile, the spacing of anti-slide pile, the sectional dimension of anti-slide pile and the anchorage length of anti-slide pile were changed to study the bending moment and horizontal displacement of the anti-slide piles under different conditions. Research results show that the size of sectional dimension of anti-slide pile has significant impacts on the bending moment and displacement of anti-slide pile, as well as the stability of the CRS. The pile spacing has less effect on the bending moment of anti-slide pile, but has more effect on the stability of the CRS. In engineering practice, inclination of the interface between the platform and bedrock should be reduced as much as possible, and the horizontal displacement of gravity retaining wall should be controlled within a certain range. © 2019, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.