基于离心模型试验的黄土高填方沉降影响因素分析

doi:10.13722/j.cnki.jrme.2018.0752

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Abstract Centrifuge model tests were performed to investigate the settlement of high loess-filled foundations in a valley during construction stage and in post-construction stage，and the influence factors on the settlement were discussed. Results illustrate that the settlement of the high loess-filled foundation is significantly affected by some factors such as the filling rate，filling height，valley shape，degree of compaction and time，and mainly occurs in the construction stage with a small proportion in the post-construction stage. The settlement in the post-construction stage increases linearly with the filling height and logarithmically with the time，while the post-construction settlement rate decreases exponentially with the time. Compared to the filled foundation in a U-shaped valley，the deformation of the loess-filled foundation in a narrow valley is evidently confined and as a result，the settlement is smaller and the time required to reach the stable state is shorter. A high compaction degree，a slow construction rate or a small filling height can reduce the settlement. Furthermore，the improvement of the compaction degree will be more significant for the settlement control of a thick filling body，the change of the construction rate directly affects the settlement of filled foundations in the construction stage，and there is a relatively stable positive correlation between the long-term post-construction settlement and the filling height.

Key words： soil mechanics centrifugal model test high-fill embankment settlement and deformation influencing factors

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	Articles by authors
	ZHENG Jianguo1
	2
	3
	CAO Jie1
	2
	3
	ZHANG Jiwen1
	2
	4
	LIU Zhi1
	2
	3
	LIANG Xiaolong1
	2
	3
	YANG Chao1
	2
	LI Bo5

Cite this article:

ZHENG Jianguo1,2,3, et al. Analysis of influencing factors of high loess-filled foundations based on centrifugal model tests[J]. , 2019, 38(3): 560-571.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0752 OR http://www.rockmech.org/EN/Y2019/V38/I3/560

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