川西全强风化卵石土边坡稳定性影响因素分析

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Abstract Research purposes: There are a large number of fully weathered pebble soil (Q₂,Q₃) formations in the westSichuan region,which are prone to instability,collapse and slide when encountering water.Based on the slopeengineering of west Sichuan region railways, the dynamic problems of the whole process of slope failure were analyzed and the influences of slope rate, slope height and water content for slope stability were considered with particle flow code. According to the influence of property, the sensitivity order is obtained, and the control suggestions of slope ratioand slope height are put forward in slope design, so as to provide technical support for the construction of slope engineering in weathered pebble soil layer.
Research conclusions: (1)The characteristics of failure for fully weathered pebble soil slope were completely in accordwith pull-type slip,landslide body was dispersed.(2)The sensitivity order of influencing factors on stability is asfollows:slope rate>slope height>water content;the stability factor of slope decreased by 1.9 with that slope rateincreased from 1∶1.5 to 1∶0.75, the safety factor decreased by 0.5 as a result of being softened with that the watercontent increased from 14% to 16%, the slope was more stable with low height.(3)It was recommended for slopedesign that the slope rate needed to be less than 1∶1.25, the slope height should be controlled below 8 m, andwaterproof-drainage measures had better be taken to control water content under 14%.(4)The study can provide corresponding references for stability analysis and protection design of fully weathered pebble soil slope for west Sichuan region.

Key words： west Sichuan region fully weathered pebble soil slope stability influencing factors

Received: 07 February 2021

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TU449

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	XU Hua
	ZHOU Tingyu
	WANG Dong
	ZHANG Guangze
	ZHANG Xiaobo

Cite this article:

XU Hua,ZHOU Tingyu,WANG Dong, et al. Analysis on Factors Influencing Stability of Fully Weathered Pebble Soil Slope in Western Sichuan[J]. Journal of Railway Engineering Society, 2023, 40(11): 1-7.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2023/V40/I11/1

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