Abstract
In recent years, the number of high-filled slopes has gradually increased, and the height has continued to grow, with the maximum filling height exceeding 100 m. Therefore, a suitable and reliable method of slope safety evaluation is significant. In this paper, by combining the entropy weight method with the evidence theory, a safety evaluation method for high fill slopes considering anisotropy and heterogeneity is proposed, called the entropy weight-evidence theory method (EWETM). By studying the anisotropy and heterogeneity of compacted loess, the displacement identification interval considering anisotropy and heterogeneity is constructed. The test results show that peak strength perpendicular to the layered interface is greater than that in the parallel direction, while the corresponding shear displacement is smaller than that in the parallel direction. Besides, the deep horizontal displacement monitoring system was established to analyze the motion law of the high fill slope. The result shows that the movement direction at the junction of adjacent slopes changed clockwise or counterclockwise with the increase of height. Finally, the local and overall safety of the high-fill slope at Nanniwan Airport was evaluated by the EWETM, and the range of the slope safety probability was obtained. Moreover, this method can effectively forecast and reduce the occurrence of high fill slope disasters.
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Acknowledgements
Thanks to the funding support from the Fundamental Research Funds for the Central Universities, CHD (300102212510), and Colleges and Universities in Jiangsu Province Plans to Graduate Research and Innovation (KYCX19-0098) and the technical help from colleagues at Chang’an University.
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Li, Z., Sun, L., Liu, L. et al. Research on safety evaluation method of high-fill slope considering heterogeneity and anisotropy. Bull Eng Geol Environ 81, 275 (2022). https://doi.org/10.1007/s10064-022-02766-0
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DOI: https://doi.org/10.1007/s10064-022-02766-0