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- Title
Seismic Overall Stability of Embankment Slopes Retained by Multi-step Cantilever Retaining Walls Using Pseudo-Static Method.
- Authors
Li, Zhaoying; Xiao, Shiguo
- Abstract
A proposed new type of retaining structure, multi-step cantilever retaining walls, has a wide application prospect because of light weight, quick installation, and good applicability for high fill earthworks. In light of the potential log-spiral sliding failure mode of the retaining walls along with soil mass under seismic condition, the seismic overall stability of the wall-slope system is analyzed based on the upper-bound limit analysis method and shear strength reduction strategy. According to the pseudo-static method, horizontal and vertical seismic coefficients are introduced into the derived formula of factor of safety. A practical embankment example shows that the upper bound solutions of factor of safety and critical slip surface are in good agreement with those by Spencer method, Morgenstern-Price method and numerical simulation method. The increases of shear strength parameters, unit weight of the backfill and wall gravity are helpful to improve the overall stability. Both horizontal and vertical seismic loads have noticeable effect on the slope stability. Under the constant height of the fill earthworks, the factor of safety decreases and the critical slip surface develops outwards obviously as the total number of vertical wall members increases.
- Subjects
RETAINING walls; SLOPE stability; LANDFILLS; SAFETY factor in engineering; CANTILEVERS; SHEAR strength; EARTH dams
- Publication
Geotechnical & Geological Engineering, 2023, Vol 41, Issue 3, p1893
- ISSN
0960-3182
- Publication type
Article
- DOI
10.1007/s10706-023-02378-9