闭口阶梯型管桩水平承载性状模型试验研究

doi:10.13722/j.cnki.jrme.2014.0045

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Abstract Base on indoor model experiments of mouth-closed step cross-section and constant cross-section pipe piles performed in foundation pit，the load transfer characteristics of both kinds of mouth-closed pipe piles were studied by comparing horizontal load-settlement curves，horizontal critical load and bending moment distribution of piles. Results of test show that horizontal load-settlement curves change slowly of both kinds of piles. Horizontal bearing capacities of step cross-section pipe piles are higher than constant cross-section pipe piles and there are close relation to average diameters of both kinds pipe piles. Horizontal critical bearing capacity per unit volume has increased by different degrees with improvement of segmentally cross-section ratio. Moreover，to step cross-section pipe piles，there are two bending moment extreme on pile and bending moment extreme on small diameter pipe has declined with the improvement of segmentally cross-section ratio. Finally，it is very obvious that step cross-section pipe pile is more reasonable than constant cross-section pipe pile in bearing characteristics because the bending moment has been improved greatly on small diameter pipes.

Key words： pile foundation horizontal static load test step cross-section pipe pile constant cross-section pipe pile model test

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	Articles by authors
	YANG Qingguang
	TIAN Jie
	LIU Jie
	WANG Yahui

Cite this article:

YANG Qingguang,TIAN Jie,LIU Jie, et al. MODEL TEST STUDY OF HORIZONTAL BEARING CHARACTERISTICS OF MOUTH-CLOSED STEP CROSS-SECTION PIPE PILE[J]. , 2015, 34(S2): 4412-4417.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0045 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4412

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