堆积层滑坡偏角比预警模型

doi:10.13722/j.cnki.jrme.2023.1057

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Abstract The establishment of an effective landslide early warning model is of great significance for the prevention of landslide disasters. This study aims to establish the early warning model of deflection angle ratio for accumulation landslides. First，the tests that reproduce the deformation-destabilization process of accumulation landslides are carried out. Based on the test monitoring results，a displacement dynamics parameter，the deflection angle ratio，which has directionality and unity，is proposed. Moreover，the corresponding landslide early warning model of deflection angle ratio is presented. Finally，monitoring data from three real landslides are utilized to validate this warning model. The results show that the deflection angle ratio presents a general pattern of first fluctuation and subsequent smoothness during the evolution process of accumulation landslides. The Frobenius norm of 0.2 can be used as the dividing value between the fluctuating and smooth segments of the deflection angle ratio. The smooth characteristic of the deflection angle ratio can indicate the deformation stage of accumulation landslides. Based on this，the single-point warning criterion and the multi-point warning criterion of the Frobenius norm are proposed. When applying the early warning model of deflection angle ratio to real landslides，it is recommended that this warning model is used in conjunction with the warning model that is based on the magnitude of total unidirectional displacement，in order to arrive at a more comprehensive early warning judgment.

Key words： slope engineering accumulation landslides landslide early warning deflection angle ratio frobenius norm deformation-destabilization process

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	Articles by authors
	RAO Yunkang1
	2
	FU Haiying2
	YANG Tao2

Cite this article:

RAO Yunkang1,2,FU Haiying2, et al. Early warning model of deflection angle ratio for accumulation landslides#br#[J]. , 2024, 43(10): 2540-2551.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.1057 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I10/2540

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