不同加筋方式下碎石桩复合地基承载性能试验研究

doi:10.13722/j.cnki.jrme.2022.1014

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Abstract A set of indoor model test device for gravel pile composite foundation was fabricated，and 11 groups of indoor model tests of reinforced gravel pile composite foundation and 2 groups of unreinforced comparison tests were carried out. The composite foundation bearing capacity，pile-soil stress ratio，bearing capacity improvement rate and pile bulge deformation under different parcel lengths，reinforcement spacings and reinforcement combination methods are researched. The test results show that compared with the traditional gravel pile，the bearing capacity of the composite foundation is significantly improved by reinforcement，and the vertical reinforcement effect of the full-length wrapped is the most significant. The reinforcement method with larger composite foundation bearing capacity improvement corresponds to larger bearing capacity improvement rate and pile-soil stress ratio. The improvement rate of bearing capacity increases with the increase of reinforcement length and reinforcement spacing. The pile-soil stress ratio of the composite foundation fluctuates with the increase of settlement. And increases with the reduction of reinforcement spacing and the increase of reinforcement length；There are some differences in the deformation law of pile body under different reinforcement methods. The bulging deformation of pile body with full-length wrapped vertical reinforcement method is relatively uniform and the deformation is small，which has better effect on improving the bearing capacity of composite foundation and inhibiting the bulging deformation of pile body.

Key words： pile foundation stone columns reinforcement method model test stress ratio lateral bulging

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	Articles by authors
	LI Lihua1
	2
	CAO Yu1
	2
	LIU Juqiang1
	2
	XIAO Henglin1
	2
	ZHANG Dongfang1
	2
	LIU Yiming1
	2

Cite this article:

LI Lihua1,2,CAO Yu1, et al. Experimental study on load bearing performance of stone columns under different reinforcement methods[J]. , 2023, 42(12): 3085-3094.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1014 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I12/3085

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