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| Seismic stability limit analysis of reinforced soil slopes with prestressed cables considering inhomogeneity and anisotropy of multiple parameters |
| XIA Yuanyou，CHEN Chunshu |
(School of Civil Engineering and Architecture，Wuhan University of Technology，Wuhan，Hubei 430070，China)
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Abstract A limit analysis based on the horizontal slice method was proposed for the seismic stability of soil slopes reinforced with prestressed cables considering the inhomogeneity and anisotropy of multiple parameters. In this method，the sliding soil mass was divided into several horizontal slices，and the soil inside each slice was treated as a homogeneous part. The energy power of each horizontal slice was calculated based on the partitioning method and was substituted into the energy equation. According to the geometrical relationship among the polar angles of the slices，two polar angles were chosen to be the optimization variables in the computational program based on genetic algorithm theory. This method was applied in a case study，where the inhomogeneity was simplified as the linear distribution along depth. The reliability of this method was verified，and the influence of the parameters concerning the inhomogeneity and anisotropy on the seismic stability were analyzed. The results of analysis indicated that the yield acceleration factor of the slope is not sensitive to the inhomogeneity of cohesive force，it is therefore feasible to use the average value of cohesive force. The inhomogeneity of internal friction angle and unit weight have remarkable effects on the yield acceleration factor. The anisotropy coefficient influences greatly the yield acceleration factor.
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2018, Vol. 37 
