可控刚度桩筏基础桩土共同作用的工程实践

doi:10.13722/j.cnki.jrme.2017.0247

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Abstract Because the end-bearing pile has a large supporting stiffness，a small vertical deformation under the normal working load on the top of the pile will not activate the pile-soil interaction. As a result，the natural bearing capacity of foundation soil is not fully utilized. The typical project presented in this paper successfully solved the problem of pile-soil interaction of pile foundation with large supporting stiffness，and also optimized the stiffness distribution in the piled raft system. The process of the design and numerical analysis are described in detail. The field test data and analytic results were compared and analyzed to verify the rationality and reliability of the piled raft foundation applied with controllable stiffness. The results of numerical analysis and field test show that the total settlement and differential settlement of the building meet the design requirements after adopting the piled raft foundation with controllable stiffness. The foundation soil bore 63% of the superstructure load and the number of the piles significantly is reduced.

Key words： pile foundation end-bearing piles stiffness adjustor controllable stiffness pile-soil interaction variable rigidity design

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	Articles by authors
	ZHOU Feng1
	2
	ZHU Rui1
	GUO Tianxiang3
	ZHAI Dezhi1

Cite this article:

ZHOU Feng1,2,ZHU Rui1, et al. Engineering practice in pile-soil interaction of pile-raft foundations with controllable stiffness[J]. , 2017, 36(12): 3075-3084.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0247 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I12/3075

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