An Application of the Maximum Shear Strain Increment in Searching Sliding Surfaces

Abstract:

A slope landslides generally at the place where the shear strain increment is the largest. This position is considered as the standard of defining sliding surfaces to assess the slope stability under the action of the foundation. A new method is proposed to determine the potential sliding surface, which is based on the largest shear strain increment. Firstly, the stress and strain in the slope were calculated by using the finite difference software-FALC3D. Secondly, a series of vertical line would be set in the calculating section. And then the discrete coordinates of the sliding surface, where the shear strain is largest on the vertical line, would be found through programming fish program. At last the position and shape of the sliding surface can be obtained through carrying on curve fitting of the discrete points by using the least squares method. The concept of this method is clear and can reflect the true form of the sliding surface through contrasting with the limit equilibrium method. Sliding surfaces of different depths and distances of slope are researched and a quadratic function is put forward which can describe the trends of glide direction. Three coefficients of the quadratic function were analyzed and the corresponding expression was obtained which can provide a reference to specification revision and engineering.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 1618-1622
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.1618
• Online since: September 2013
• Authors: Liu Yong Cheng*, Jian Li, Shan Xiong Chen, Xiao Jie Chu
• Keywords: FLAC^3D, Maximum Shear Strain Increment, Sliding Surfaces Searching

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