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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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.0247 OR http://www.rockmech.org/EN/Y2017/V36/I12/3075

[1]	REUL O，RANDOLPH M F. Design strategies for piled rafts subjected to nonuniform vertical loading[J]. Journal of Geotechnical and Geoenvironmental Engineering，2004，130 (1)：1-13. " target="_blank">
[4]	BURLAND J B. Behavior of foundations and structures on soft ground[J]. Proc. 9th ICSMFE，1977：495-546. " target="_blank">
[7]	阎明礼，吴春林，杨军. 水泥粉煤灰碎石桩复合地基试验研究[J]. 岩土工程学报，1996，18(2)：55-62.(YAN Mingli，WU Chunlin，YANG Jun. Experimental study on cement-flyash pile composite foundation[J]. Chinese Journal of Geotechnical Engineering，1996，18(2)：55-62.(in Chinese))
[10]	周峰，郭亮，刘壮志，等. 位移调节器用于端承型桩筏基础的模型试验研究[J]. 岩土工程学报，2012，34(2)：373-378.(ZHOU Feng，GUO Liang，LIU Zhuangzhi， et al. Model tests on end-bearing pile foundation by use of settlement adjustor[J]. Chinese Journal of Geotechnical Engineering，2012，34(2)：373-378.(in Chinese))
[14]	中华人民共和国行业标准编写组. JGJ79—2012 建筑地基处理技术规范[S]. 北京：中国建筑工业出版社，2012.(The Professional Standards Compilation Group of People?s Republic of China. JGJ79—2012 Technical code for ground treatment[S]. Beijing：China Architecture and Building Press，2012.(in Chinese)) " target="_blank">
[16]	中华人民共和国行业标准编写组. DBJ/T13-342-2016福建省可控刚度桩筏基础技术规程[S]. 福州：福建科学技术出版社，2016.(The Professional Standards Compilation Group of People?s Republic of China. DBJ/T13-342-2016 Technical Code for controllable stiffness piled raft foundation in Fujian Province[S]. Fuzhou：Fujian Science and Technology Publishing House，2016.(in Chinese)) " target="_blank">
[5]	REZA Z M，EHSAN I，MEHRAD M. 3D finite elements analysis of vertically loaded composite piled raft[J]. Journal of Central South University，2013，20(6)：1 713-1 723. " target="_blank">
[6]	宰金珉. 桩土明确分担荷载的复合桩基及其设计方法[J]. 建筑结构学报，1995，16(4)：66-74.(ZAI Jinmin. Composite pile foundation with distinct load distribution in piles and soils and its design method[J]. Journal of Building Structure，1995，16(4)：66-74.(in Chinese))
[9]	LIANG F Y，CHEN L Z，SHI X G. Numerical analysis of composite piled raft with cushion subjected to vertical load[J]. Computers and Geotechnics，2003，30(6)：443-453.
[13]	周峰，屈伟，郭天祥，等. 基于沉降控制的端承型复合桩基工程实践[J]. 岩石力学与工程学报，2015，36(5)：1 071-1 079.(ZHOU Feng，QU Wei，GUO Tianxiang，et al. Engineering practice of composite end-bearing pile foundation based on settlement control[J]. Chinese Journal of Rock Mechanics and Engineering，2015，36(5)：1 071-1 079.(in Chinese))
[15]	ZHOU F，LIN C，WANG X D，et al. Application of deformation adjustors in piled raft foundations[J]. Proceedings of the Institution of Civil Engineers，2016，169(6)：527-540. " target="_blank">
[8]	刘鹏，杨光华. 考虑桩端刺入沉降的桩土自平衡式复合地基设计[J]. 岩土力学，2012，33(2)：539-546.(LIU Peng，YANG Guanghua. Pile-soil self-balanced composite foundation design considering pile-end piercing settlement[J]. Rock and Soil Mechanics，2012，33(2)：539-546.(in Chinese))
[11]	周峰，宰金珉，梅国雄，等. 桩土变形调节装置的研制与应用[J]. 建筑结构，2009，39(7)：40-42.(ZHOU Feng，ZAI Jinmin，MEI Guoxiong，et al. Manufacture and application of displacement adjustor used in pile and soil[J]. Building Structure，2009，39(7)：40-42.(in Chinese))
[2]	LEE J H，KIM Y H，JEONG S S. Three-dimensional analysis of bearing behavior of piled raft on soft clay[J]. Computers and Geotechnics，2010，37(1/2)：103-114. " target="_blank">
[12]	宰金珉，周峰，梅国雄，等. 端承桩复合桩基及其设计方法[J]. 工业建筑，2008，(1)：60-64.(ZAI Jinmin，ZHOU Feng，MEI Guoxiong，et al. End bearing composite pile foundation and its design method[J]. Industrial Construction，2008，(1)：60-64.(in Chinese))
[17]	宰金珉，周峰，梅国雄，等. 自适应调节下广义复合基础设计方法与工程实践[J]. 岩土工程学报，2008，30(1)：93-99.(ZAI Jinmin，ZHOU Feng，MEI Guoxiong，et al. Model tests on end-bearing pile foundation by use of settlement adjustor[J]. Chinese Journal of Geotechnical Engineering，2008，30(1)：93-99.(in Chinese))
[3]	WONG I H，CHANG M F，CAO X D. Raft foundations with disconnected settlement reducing piles[C]// Design Application of Raft Foundations and Ground Slabs. London：Thomas Telford，2000：469-486. " target="_blank">