基于演化分析的多年冻土区路基补强后力学稳定性评价研究

doi:10.13722/j.cnki.jrme.2021.0630

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Abstract In warm and ice-rich permafrost regions，the settlement deformation of the traditional embankments is obvious owing to permafrost degradation. Therefore，cooling methods，such as crushed-rock revetments and thermosyphons，should be implemented in the embankments to improve the thermal and mechanical stability of the embankments. To evaluate the reinforcing effects of different types of reinforcement measures and the mechanical stability of the reinforced embankments，based on six monitoring sections along the Qinghai—Tibet Railway in permafrost regions，the reinforcing effects of combined crushed-rock revetment and thermosyphon measure and single crushed-rock revetment measure are evaluated by analyzing historical deformation data. Then，the settlement process of three sections with large deformation is evolved by using the Verhulst model and the exponential curve method in order to evaluate the mechanical stability of three sections. The results show that the deformation rate of a traditional embankment will be effectively slowed down after reinforced while that the reinforcement efficiency of the combined measure is faster than the single crushed-rock revetment. In the permafrost regions with massive ground ice，the mechanical stability of the embankments can be significantly improved by using combined measures. A single reinforcement measure may only slow down the deformation rate of the embankments to a certain extent，but can not effectively improve their long-term mechanical stability. In addition，the uneven settlement of the embankments can be effectively adjusted by using crushed-rock revetment with different thicknesses on both sides of the embankments. This study aims to deepen the understanding of the effect of embankment reinforcement measures and to provide a scientific basis for embankment reinforcement in the permafrost regions.

Key words： soil mechanics permafrost regions Qinghai—Tibet railway reinforcement measures settlement evolution mechanical stability

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	Articles by authors
	ZHANG Saize1
	2
	NIU Fujun1
	WANG Zhiwei3
	WANG Jinchang3
	DONG Tianchun3

Cite this article:

ZHANG Saize1,2,NIU Fujun1, et al. Mechanical stability assessment of reinforced embankments in permafrost regions using evolution analysis[J]. , 2022, 41(6): 1285-1295.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0630 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I6/1285

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