斜坡基底软土桩–网复合地基变形特性离心试验研究

doi:10.13722/j.cnki.jrme.2017.0236

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

Download: PDF (451 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Centrifuge test modeling a typical project of coastal railway line was conducted in order to study the deformation characteristics of pile-geogrid composite foundation in soft soil underneath the slope. The vertical and horizontal movements and the differential settlement of the embankment surface keep increasing during the operation period. The majority amount of the vertical and horizontal movements of the embankment surface was developed during the construction period，while the majority amount of the differential settlement was developed during the operation period. The lateral movement of the soft ground surface is constrained by the geogrid- reinforcement. The horizontal and vertical deformation in soft ground at the side of slope base is larger than the other side，thus an asymmetric settlement basin appears. The vertical and horizontal movements at the head of platform piles are less than that of slop piles and floating piles. The platform piles are under bending and tension or bending and shear deformation，the piles in slope experience the inclination deformation，and the floating piles experience the inclination deformation and lateral movement. The piles pierce upwards into the geogrid reinforcement and downwards into the underlying stratum，and the muddy clay between the slope piles flows around the piles laterally like fluid.

Key words： pile foundations slope base soft soil centrifuge model test pile-geogrid composite foundation deformation characteristics

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Feicheng1
	2
	ZHANG Jianjing1
	2

Cite this article:

LIU Feicheng1,2,ZHANG Jianjing1, et al. Centrifuge test on deformation characteristics of pile-geogrid composite foundation in soft soil under slope[J]. , 2018, 37(1): 209-219.

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.0236 OR http://www.rockmech.org/EN/Y2018/V37/I1/209

[13]	向科，罗凤. 土工离心模型试验中的加筋材料[J]. 地下空间与工程学报，2007，3(5)：889-892.(XIANG Ke，LUO Feng. Reinforcing material in centrifuge model test[J]. Chinese Journal of Underground Space and Engineering，2007，3(5)：889-892.(in Chinese))
[2]	林育梁，叶朝良. 路堤软土地基变形形状模型试验研究[J]. 公路，2002，12(12)：35-39.(LIN Yuliang，YE Chaoliang. Research on deformation behavior in soft-soil foundation under embankment by laboratory model test[J]. Highway，2002，12(12)：35-39.(in Chinese))
[1]	王其昌. 高速铁路土木工程[M]. 成都：西南交通大学出版社，1999：341-343.(WANG Qichang. High speed railway civil engineering[M]. Chengdu：Southwest Jiaotong University Press，1999：341-343.(in Chinese))
[4]	胡勇刚，罗强，张良，等. 基于离心模型试验的水泥土搅拌桩加固斜坡软弱土地基变形特性研究[J]. 岩土力学，2010，31(7)： 2 207-2 213.(HU Yonggang，LUO Qiang，ZHANG Liang，et al. Deformation characteristics analysis of slope soft soil foundation treatment with mixed-place pile by centrifuge model tests[J]. Rock and Soil Mechanics，2010，31(7)：2 207-2 213.(in Chinese))
[8]	蒋鑫，刘晋南，黄明星，等. 抗滑桩加固斜坡软弱地基路堤的数值模模拟[J]. 岩土力学，2012，33(4)：1 261-1 267.(JIANG Xin，LIU Jinnan，HUANG Mingxing，et al. Numerical simulation of embankment on sloped weak ground reinforced by anti-slide piles[J]. Rock and Soil Mechanics，2012，33(4)：1 261-1 267.(in Chinese))
[10]	WON P H，HAEHO L，SEONGWON H. Full-scale tests on embankments founded on pile beams[J]. Journal of Geotechnical and Geoenvironmental Engineering，2014，140(12)：1-8.
[11]	Numerical study of basal reinforced embankments supported on floating/end bearing piles considering pile-soil interaction[J]. Geotextiles and Geomembranes，2015，43(6)：524-536.
[15]	中华人民共和国行业标准编写组. 土工合成材料测试规程[S]. 北京，中国水利水电出版社，2012.(The Professional Standards Compilation Group of People?s Republic of China. Specification for test and measurement of geosynthetics[S]. Beijing：China Water Power Press，2012.(in Chinese))
[3]	张良，魏永幸，罗强. 基于离心模型试验的斜坡软弱土地基路堤加固方案研究[J]. 铁道工程学报，2004，81(1)：73-76.(ZHANG Liang，WEI Yongxing，LUO Qiang. Study on reinforcement projects for slope flabby subgrade embankment based on centrifugal model tests[J]. Journal of Railway Engineering Society，2004，81(1)：73-76. (in Chinese))
[5]	罗强，胡勇刚，张良，等. 水泥土搅拌法加固斜坡软弱土地基的土工离心模型试验研究[J]. 中国铁道科学，2010，31(4)：12-19. (LUO Qiang，HU Yonggang，ZHANG Liang，et al. The geotechnical centrifuge model experiment study of the slope soft-soil foundation improved by cement soil mixing method[J]. China Railway Science，2010，31(4)：12-19.(in Chinese))
[6]	刘晋南，蒋鑫，邱延峻. 软弱层特性对斜坡软弱地基路堤变形的影响[J]. 西南交通大学学报，2013，48(2)：303-309.(LIU Jinnan，JIANG Xin，QIU Yanjun. Influence of weak layer properties on deformation of embankment over sloped weak ground[J]. Journal of Southwest Jiaotong University，2013，48(2)：303-309.(in Chinese))
[12]	徐光明，章为民. 离心模型中的粒径效应和边界效应研究[J]. 岩土工程学报，1996，18(3)：80-86.(XU Guangming，ZHANG Weimin. Centrifuge model technique of size effect and boundary effect[J]. Chinese Journal of Geotechnical Engineering，1996，18(3)：80-86. (in Chinese))
[22]	郑刚，刘力，韩杰. 刚性桩加固软弱地基上路堤的稳定性问题[II]——群桩条件下的分析[J]. 岩土工程学报，2010，32(12)： 1 811-1 820.(ZHENG Gang，LIU Li，HAN Jie. Stability of embankment on soft subgrade reinforced by rigid inclusions(II)-group piles analysis[J]. Chinese Journal of Geotechnical Engineering，2010， 32(12)：1 811-1 820.(in Chinese))
[7]	刘晋南，蒋鑫，邱延峻. 路堤荷载作用下斜坡软弱地基变形耦合特性研究[J]. 铁道学报，2015，37(4)：94-100.(LIU Jinnan，JIANG Xin，QIU Yanjun. Deformation coupling characteristics of sloped weak ground under embankment load[J]. Journal of the China Railway Society，2015，37(4)：94-100.(in Chinese))
[16]	曾友金，章为民，王年香，等. 桩基模型试验研究现状[J]. 岩土力学，2003，24(增2)：674-686.(ZENG Youjin，ZHANG Weimin，WANG Nianxiang，et al. Reviews of state-of-art of modeling simulation on pile foundations[J]. Rock and Soil Mechanics，2003，24(Supp.2)：674-686.(in Chinese))
[18]	杜延龄，韩连兵. 土工离心模型试验技术[M]. 北京，中国水利水电出版社，2010：19-20.(DU Yanlin，HAN Lianbing. Experimental technology of centrifuge modeling tests[M]. Beijing：China Water Power Press，2010：19-20.(in Chinese))
[20]	黄广军，张千里，余锡健，等. 加筋垫层对地基沉降控制效果的多方案比较[J]. 岩土工程学报，2001，23(5)：598-601.(HUANG Guangjun，ZHANG Qianli，YU Xijian，et al. Comparison of settlement control of reinforcement layer[J]. Chinese Journal of Geotechnical Engineering，2001，23(5)：598-601.(in Chinese))
[21]	郑刚，李帅，刁钰. 刚性桩复合地基支承路堤稳定破坏机理的离心模型试验[J]. 岩土工程学报，2012，34(11)：1 977-1 989. (ZHENG Gang，LI Shuai，DIAO Yu. Centrifugal model tests on failure mechanisms of embankments on soft ground reinforced by rigid piles[J]. Chinese Journal of Geotechnical Engineering，2012，34(11)：1 977-1 989.(in Chinese))
[9]	蒋鑫，梁多伟，刘晋南，等. 碎石桩与抗滑桩联合加固斜坡软弱地基路堤的工作机理分析[J]. 铁道学报，2015，37(12)：81-87. (JIANG Xin，LIANG Duowei，LIU Jinnan，et al. Working mechanism of embankment over sloped weak ground reinforced by combination of gravel piles and slide-resistant piles[J]. Journal of the China Railway Society，2015，37(12)：81-87.(in Chinese))
[14]	王长丹，王炳龙，王旭，等. 湿陷性黄土桩网复合地基沉降控制离心模型试验[J]. 铁道学报，2011，33(4)：84-92.(WANG Changdan，WANG Binglong，WANG Xu，et al. Analysis on settlement controlling effect of pile-net composite foundation on collapsible loess by centrifugal model tests[J]. Journal of The China Railway Society，2011，33(4)：84-92.(in Chinese))
[17]	中华人民共和国行业标准编写组. TB10001—2005铁路路基设计规范[S]. 北京：中国铁道出版社，2005.(The Professional Standards Compilation Group of People?s Republic of China. TB10001—2005 Code for design on subgrade of railway[S]. Beijing：China Railway Press，2005.(in Chinese))
[19]	TAN T S，INOUE T，LEE S L. Hyperbolic method for consolidation analysis[J]. Journal of Geotechnical engineering，1991，117(11)： 1 723-1 737.