就地固化土层联合桩复合地基桩土应力比分析

doi:10.13722/j.cnki.jrme.2022.1132

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Abstract The pile-soil stress ratio of the composite foundation reinforced by piles and solidification layer under embankment load was studied. The friction resistance of pile was supposed to be constant in the solidification layer and linearly increased with depth in the soft layer，considering the impacted of the relative displacement of pile and soil. Based on the load-transfer method，the force on the discretization of the soil and piles were analyzed. The analytical expression of the pile-soil stress ratio of the composite foundations was derived，taking the compatibility equation of deformation into consideration. The influence factors of the pile-soil stress ratio such as the solidification layer，the modulus and thickness influence were studied. The result show that set solidification layer on deep soft soil foundation using the suitable dosage of curing agent can decrease the pile-soil stress ratio，increase the bearing capacity of soil between piles and the composite foundation. The increase amplitude is not obvious while the elasticity modulus of the solidification layer larger than 50 MPa，so the dosage of curing agent should be in the suitable range. The pile-soil stress ratio increase with the increasing thickness of the solidification layer，but the choose of the thickness should in the right range from a economy perspective.

Key words： road engineering composite foundation reinforced by piles and solidification layer cement mixing pile pile friction resistance pile-soil stress ratio

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	Articles by authors
	CHEN Long1
	2
	CHAI Zhewei1
	SHEN Zheng3
	CHEN Yonghui1
	4
	XIE Chenlei1
	LI Desheng1

Cite this article:

CHEN Long1,2,CHAI Zhewei1, et al. Study on the pile-soil stress ratio of the composite foundations reinforced#br# by piles and solidification layer[J]. , 2023, 42(10): 2578-2587.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1132 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I10/2578

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