多次分段注浆钢花管桩群结构抗滑性能模型试验研究

doi:10.13722/j.cnki.jrme.2018.1157

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Abstract In order to better study the prevention and control mechanisms of multi-stage grouting steel pile group， large scale field model tests were carried out to analyze the anti-sliding performance of multiple segmented grouting steel pile group from the aspects of soil pressure and bending of steel pipe. Grouting effect，pile group effect and failure mode were also discussed. The test results show that，while a slope is reinforced by multiple segmented grouting steel pile group，“root shaped” anti-sliding cement columns around the grouting steel piles form，which can efficiently enhance the strength of the soil around the piles and improve the anti-sliding ability of the pile group. The horizontal anti-sliding force of every pile of multiple segmented grouting steel pile group structure with three rows of pipes of 6.0 in length was 1.1×104 N larger than that of single row piles，and the lateral bearing capacity of single pile increases by about 10.5% considering the group pile effect. Because of tat the bending failure of every pile of pile group happens near the sliding surface，it is suggested that the reinforcement ratio of the piles near the sliding surface should be properly enhanced to improve the anti-sliding ability.

Key words： pile foundations grouting steel piles multiple segmented grouting pile group effect anti-sliding mechanism

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	Articles by authors
	ZHANG Yufang1
	WEI Shaowei1
	ZHOU Wenjiao2
	LI Dingwei3
	ZHOU Bin3

Cite this article:

ZHANG Yufang1,WEI Shaowei1,ZHOU Wenjiao2, et al. Model test study on anti-sliding behaviours of multiple segmented grouting steel pile group structure[J]. , 2019, 38(5): 982-992.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.1157 OR http://www.rockmech.org/EN/Y2019/V38/I5/982

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