基于边坡下滑方向的传递系数法

doi:10.13722/j.cnki.jrme.2023.0189

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Abstract The transfer coefficient method is the original limit equilibrium method of analysis utilized in China for calculating the sliding thrust force of landslide. Due to its straightforward and pragmatic calculation，it finds extensive application in landslide prevention and treatment engineering. However，this method exhibits limitations for complex sliding bodies with an angle greater than 10° between adjacent slices，often resulting in significant calculation errors. Based on the sliding direction of slope，the slope sliding thrust can be transferred along the sliding direction rather than along the bottom of the slices，and the improved transfer coefficient method was proposed. The calculation results of a landslide with a circular sliding surface and a landslide with a gently tipping polyline sliding surface indicate that the proposed method exhibits a safety factor error of 3.73% when compared to the strict limit equilibrium M-P method. Additionally，the curves for sliding thrust of the proposed method are completely consistent with those of the transfer coefficient method，and its curve of the angle for sliding direction is gentler than the standard method，which verifies the rationality of the proposed method in conventional slope stability analysis. Furthermore，the analysis results of a landslide with a complex polyline sliding surface indicate that，the error of safety factor between the transfer coefficient method and M-P method is 21.66%，while the relative error is 6.83% for the proposed method. Moreover，the sliding thrust of the proposed method is slightly greater than that of the standard method. These findings demonstrate that the proposed method is suitable for determining the sliding thrust of the complex landslide，which can be used as an extension and supplement of the transfer coefficient method，providing an effective design basis for landslide prevention and treatment engineering.

Key words： slope engineering sliding direction of slope sliding thrust transfer coefficient method strict limit equilibrium method

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	LI Jiahang1
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	GUO Mingwei1
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	YANG Zhi1
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Cite this article:

LI Jiahang1,2,GUO Mingwei1, et al. Transfer coefficient method of calculating sliding thrust based on sliding direction of slope[J]. , 2023, 42(S2): 4261-4270.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0189 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/4261

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