刚性基础下组合渗流碎石桩–不排水桩复合地基固结分析

doi:10.13722/j.cnki.jrme.2018.0692

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (489 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The equal vertical strains were assumed and the smear effect in subsoil surrounding the stone columns and impervious piles and the well resistances in the stone columns in vertical and radial directions were considered，so that the differential equations governing the consolidation of stone column-impervious pile composite ground were derived under the instant loading. The corresponding analytical solutions were developed under the PTIB condition，including the overall average degree of consolidation of this type of combined composite ground. The proposed solution was verified through the comparison with the results from finite element method. A parametric study was conducted using the proposed solution to investigate the consolidation behavior of the composite ground. The results show that the consolidation rate of the soft ground improved by the stone columns combined with impervious piles is much faster than that of the composite ground with impervious piles，but slightly slower than that of the composite ground improved by stone columns. The consolidation rate increases with increasing of the area replacement ratio and constrained modulus of the stone columns or the impervious piles，but decreases with the increasing of the two- dimensional well resistances in the stone columns when the diameter of the stone column is bigger. The effect of the radial well resistance on the consolidation rate is negligible when the diameter of the stone column is smaller. The disturbance of the subsoil surrounding impervious piles has negligible influence on the consolidation rate of the composite ground.

Key words： pile foundations consolidation stone column-impervious pile composite ground analytical solution

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	YANG Tao1
	LI Chao2

Cite this article:

YANG Tao1,LI Chao2. Consolidation analysis of stone column-impervious pile composite ground underneath rigid foundation considering radial and vertical flows within stone columns[J]. , 2018, 37(11): 2631-2640.

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0692 OR http://www.rockmech.org/EN/Y2018/V37/I11/2631

[2]	王丽媛，梁兵，胡永红. 某砂土液化地基处理中二元桩复合地基的设计及应用[J]. 工程地质学报，2004，12(增1)：317-320.(WANG Liyuan，LIANG Bing，HU Yonghong. Application of binary pile composite subgrade on a sand-liquefaction treatment[J]. Journal of Engineering Geology，2004，12(Supp.l)：317-320.(in Chinese))
[4]	林森. CFG桩-碎石桩组合型复合地基的应用实例及问题分析[J]. 建筑科学，2010，26(3)：97-99.(LIN Sen. The analysis and application of CFG pile-gravel pile composite foundation[J]. Building Science，2010，26(3)：97-99.(in Chinese))
[3]	马骥，张震，张东刚，等. 碎石桩和CFG桩联合加固地基的工程应用[J]. 施工技术，2007，36(8)：17-18.(MA Ji，ZHANG Zhen，ZHANG Donggang，et al. Practical application of gravel pile and CFG pile joint-reinforce treatment for foundation[J]. Construction Technique，2007，36(8)：17-18.(in Chinese))
[5]	孙晓东，孙宏，杨永玉. 组合型复合地基在曹妃甸大型储煤场中的应用[J]. 河北工程大学学报：自然科学版，2014，31(3)：42-46.(SUN Xiaodong，SUN Hong，YANG Yongyu. The application of combination composite foundation in large circular coal storage bunker in Caofeidian area[J]. Journal of Hebei University of Engineering：Natural Science，2014，31(3)：42-46.(in Chinese))
[7]	沈宇鹏，田亚护，冯瑞玲. GC-CFG组合桩复合地基处理高速铁路基底的应用研究[J]. 土木工程学报，2013，46(2)：136-142.(SHEN Yupeng，TIAN Yahu，FENG Ruiling. Study on treatment of GC-CFG composite piles to base of high-speed railway[J]. China Civil Engineering Journal，2013，46(2)：136-142.(in Chinese))
[10]	陈强，黄志义，左人宇，等. 组合型复合地基的特性及其FEM模拟研究[J]. 土木工程学报， 2001，34(1)：50-55.(CHEN Qiang，HUANG Zhiyi，ZUO Renyu，et al. Behavior of combined composite ground and simulation study by FEM[J]. China Civil Engineering Journal，2001，34(1)：50-55.(in Chinese))
[12]	张艳美，潘振华，张鸿儒，等. 多桩型复合地基作用机理与动力特性研究[J]. 地震工程学报，2015，37(1)：82-87.(ZHANG Yanmei，PAN Zhenhua，ZHANG Hongru，et al. Research on mechanism and dynamic characteristics of composite foundation with multi-type piles[J]. China Earthquake Engineering Journal，2015，37(1)：82-87.(in Chinese))
[13]	卢萌盟，谢康和. 复合地基固结理论[M]. 北京：科学出版社，2016：143-165.(LU Mengmeng，XIE Kanghe. Consolidation theory of composite foundation[M]. Beijing：Science Press，2016：143-165.(in Chinese))
[15]	于春亮，张爱军，赵庆玉，等. 透水桩与不透水桩组合型复合地基固结解析分析[J]. 岩土力学，2017，38(11)：3 255-3 260.(YU Chunliang，ZHANG Aijun，ZHAO Qingyu，et al. Analytical analysis for consolidation of composite foundation reinforced by permeable and impermeable piles[J]. Rock and Soil Mechanics，2017，38(11)：3 255-3 260.(in Chinese))
[17]	LU M M，SLOAN S W，INDRARATNA B，et al. A new analytical model for consolidation with multiple vertical drains[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2016，40(11)：1 623-1 640.
[1]	王步云，赵秀芹. 砂石桩与低强度混凝土桩组合型复合地基在软土地基中的应用(一)[J]. 岩土工程技术，1999，(1)：8-14.(WANG Buyun，ZHAO Xiuqin. The application in the soft soil ground of the composite foundation of sand-stone pile and concrete pile with low strength(I)[J]. Geotechnical Engineering Technique，1999，(1)：8-14.(in Chinese))
[6]	王士杰，何满潮，朱常志，等. GC与CFG桩组合桩型复合地基承载特性研究[J]. 岩土力学，2008，29(10)：2 632-2 636.(WANG Shijie，HE Manchao，ZHU Changzhi，et al. Research on bearing properties of composite foundation integrated by CFG piles and gravel piles[J]. Rock and Soil Mechanics，2008，29(10)：2 632-2 636.(in Chinese))
[8]	张振炯，牛琪瑛，刘建君. 多元复合桩加固液化土特性分析[J]. 广西大学学报：自然科学版，2013，38(4)：956-961.(ZHANG Zhenjiong，NIU Qiying，LIU Jianjun. Analysis on characteristics of liquescent sand foundation reinforced by multiple composite pile[J]. Journal of Guangxi University：Natural Science，2013，38(4)：956-961.(in Chinese))
[9]	陈强，黄志义，左人宇，等. 三元组合型复合地基的变形特性分析[J]. 工业建筑，2000，30(10)：52-55.(CHEN Qiang，HUANG Zhiyi，ZUO Renyu，et al. Analysis of deformation properties of ternary combined composite foundation[J]. Industrial Construction，2000，30(10)：52-55.(in Chinese))
[11]	梁亮，王士杰，刘青. GC与CFG多桩型复合地基抗液化数值分析[J]. 建筑科学，2017，33(1)：11-16.(LIANG Liang，WANG Shijie，LIU Qing. Numerical analysis of liquefaction resistance of multi-type-pile composite foundation with GC pile and CFG pile[J]. Building Science，2017，33(1)：11-16.(in Chinese))
[16]	WANG X S，JIAO J J. Analysis of soil consolidation by vertical drains with double porosity model[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2004，28(14)：1 385- 1 400.
[19]	赵树德. 土力学[M]. 北京：高等教育出版社，2001：120-121.(ZHAO Shude. Soil mechanics[M]. Beijing：Higher Education Press，2001：120-121.(in Chinese))
[14]	LU M M，JING H W，ZHOU Y，et al. General analytical model for consolidation of stone column-reinforced ground and combined composite ground[J]. International Journal of Geomechanics，2017，17(6)：04016131.
[18]	XIE K H，LU M M，LIU G B. Equal strain consolidation for stone columns reinforced foundation[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2009，33(15)：1 721- 1 735.
[20]	LU M M，XIE K H，GUO B. Consolidation theory for a composite foundation considering radial and vertical flows within the column and the variation of soil permeability within the disturbed soil zone[J]. Canadian Geotechnical Journal，2010，47(2)：207-217.
[21]	卢萌盟，谢康和，周国庆，等. 不排水桩复合地基固结解析解[J].岩土工程学报，2011，33(4)：574-579.(LU Mengmeng，XIE Kanghe，ZHOU Guoqing，et al. Analytical solution for consolidation of composite ground with impervious pile[J]. Chinese Journal of Geotechnical Engineering，2011，33(4)：574-579.(in Chinese))