筒桩桩承式加筋路堤现场试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (297 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为了进一步明确筒桩桩承式加筋路堤的工作机制，在广州绕城高速公路九江—小塘段进行现场试验。试验结果证明，筒桩单桩竖向承载力大，均以刺入方式破坏，并且筒桩单桩复合地基承载力大，沉降小。筒桩桩承式加筋路堤荷载传递机制主要受“土拱效应”和“拉膜效应”控制，桩土应力比随路堤荷载以及桩顶与桩间土之间沉降差的变化而变化。路堤荷载下筒桩复合地基，总沉降小，桩帽上和桩间土上的土体存在沉降差，沉降差的发展可以反映土拱效应的发挥程度。另外，路堤荷载在地基土中产生的超孔隙水压力很小，且随深度迅速减小，地下6.0 m处超孔压已接近0。路堤侧向变形小且随深度迅速减小，最大侧向变形发生在地下3.0～4.5 m处。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：桩基工程, 筒桩, 桩承式加筋路堤, 现场试验

Abstract：To validate the working mechanism of reinforced embankment supported by cast-in-situ thin-wall tubular piles，field test has been performed in a highway section from Jiujiang to Xiaotang around Guangzhou City. Test results show that tubular pile has a large vertical bearing capacity，and punching failure happens to most piles in static tests. Moreover，the bearing capacity of single tubular pile composite foundation is also large with small settlements. Tests still suggest that soil arching effect and tension membrane effect are the two key factors influencing the load transfer mechanism. The pile-soil stress ratio varies with the embankment loads and differential settlements between piles and soil. The total settlement of tubular pile composite foundation under embankment load is small. Differential settlements are found between soil above pile cap and soil among piles，respectively，and increase of this difference can reflect the degree of soil arching effect. In addition，excess pore water pressure，which is induced by embankment loads，turns up slightly and decreases rapidly along depth. It is nearly zero at the depth of 6.0 m. The lateral deformation of embankment is small，and decreases rapidly along depth；and it reaches its peak value at the depths of 3.0 to 4.5 m.

Key words： pile foundations cast-in-situ thin-wall tubular pile pile-support reinforced embankment field test

收稿日期: 2010-04-06

引用本文:

夏唐代1，2，王梅1，2，寿旋1，2，吴明3，4，5. 筒桩桩承式加筋路堤现场试验研究[J]. 岩石力学与工程学报, 2010, 29(09): 1929-1936.
XIA Tangdai1，2，WANG Mei1，2，SHOU Xuan1，2，WU Ming3，4，5. FIELD TEST STUDY OF REINFORCED EMBANKMENT SUPPORTED BY CAST-IN-SITU THIN-WALL TUBULAR PILES. , 2010, 29(09): 1929-1936.

链接本文:

http://www.rockmech.org/CN/Y2010/V29/I09/1929

[1]	JONES C J F P，LAWSON C R，AYRES D J. Geotextile Reinforced Piled Embankments[C]// HOEDT D ed. Proceedings of the 4th International Conference on Georextiles：Geomembranes and Related Products. Rotterdam：A. A. Balkema，1990：155-160. " target="_blank">
[5]	LIU H L，NG C W W，FEI K. Performance of geogrid-reinforced and pile-supported highway embankment over soft clay：case study[J]. Journal of Geotechnical and Geoenvironmental Engineering，2007，133(12)：1 483-1 493. " target="_blank">
[7]	高成雷，凌建明，杜浩，等. 拓宽路堤下带帽刚性疏桩复合地基应力特性现场试验研究[J]. 岩石力学与工程学报，2008，27(2)：354-360.(GAO Chenglei，LING Jianming，DU Hao，et al. In-situ full-scale tests on stress characteristics of composite foundation with sparse T-shaped rigid piles widening embankment[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(2)：354-360.(in Chinese))
[9]	HEWLETT W J，RANDOLPH M F. Analysis of piled embankments[J]. Ground Engineering，1988，21(3)：12-18. " target="_blank">
[10]	LOW B K，TANG S K，CHOA V. Arching in piled embankments[J]. Journal of Geotechnical Engineering，1993，120(11)：1 917-1 938. " target="_blank">
[12]	饶为国，赵成刚. 桩-网复合地基应力比分析与计算[J]. 土木工程学报，2002，35(2)：74-80.(RAO Weiguo，ZHAO Chenggang. The behavior of pile-net composite foundation[J]. China Civil Engineering Journal，2002，35(2)：74-80.(in Chinese)) " target="_blank">
[14]	朱明双，王金昌，朱向荣. 路堤荷载下现浇筒桩复合地基形状分析[J]. 浙江大学学报(工学版)，2006，40(12)：2 186-2 190.(ZHU Mingshuang，WANG Jinchang，ZHU Xiangrong. Performance analysis of cast in place tubular pile composite ground under embankment load[J]. Journal of Zhejiang University(Engineering Science)，2006，40(12)：2 186-2 190.(in Chinese)) " target="_blank">
[4]	CHEN R P，CHEN Y M，HAN J，et al. Field tests on pile-supported embankments over soft ground[J]. Journal of Geotechnical and Geoenvironmental Engineering，2009，133(6)：777-785. " target="_blank">
[8]	连峰，龚晓南，崔诗才，等. 桩-网复合地基承载性状现场试验研究[J]. 岩土力学，2009，30(4)：1 057-1 062.(LIAN Feng，GONG Xiaonan，CUI Shicai，et al. Field study of bearing behavior of pile-net composite foundation[J]. Rock and Soil Mechanics，2009，30(4)：1 057-1 062.(in Chinese)) " target="_blank">
[15]	费康，刘汉龙，高玉峰. 路堤下现浇薄壁管桩复合地基工作特性分析[J]. 岩土力学，2004，25(9)：1 390-1 396.(FEI Kang，LIU Hanlong，GAO Yufeng. Performance of cast-in-situ concrete thin wall pipe pile composite foundation under road embankment[J]. Rock and Soil Mechanics，2004，25(9)：1 390-1 396.(in Chinese)) " target="_blank">
[3]	American Association of State Highway and Transportation Officials. Innovative technology for accelerated construction bridge and embankment foundations[R]. Washington：Federal Highway Adminis- tration，2002：1-11. " target="_blank">
[6]	曹卫平，陈仁朋，陈云敏. 桩承式加筋路堤土拱效应试验研究[J]. 岩土工程学报，2007，29(3)：436-441.(CAO Weiping，CHEN Renpeng，CHEN Yunmin. Experimental investigation on soil arching in piled reinforced embankments[J]. Chinese Journal of Geotechnical Engineering，2007，29(3)：436-441.(in Chinese))
[13]	刘吉福. 路堤下复合地基桩土应力比分析[J]. 岩石力学与工程学报，2003，22(4)：674-677.(LIU Jifu. Analysis of pile-soil stress ratio for composite ground under embankment[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(4)：674-677.(in Chinese))
[16]	龚晓南. 复合地基设计和施工指南[M]. 北京：人民交通出版社，2003.(GONG Xiaonan. Introduction to design and construction of composite foundation[M]. Beijing：China Communications Press，2003.(in Chinese)) " target="_blank">
[2]	ALZAMORA D E，WAYNE M H，HAN J. Performance of SRW supported by geogrids and jet grout columns[C]// LUTENEGEER A J，DEGROOT D J ed. Proceedings of Sessions of ASCE Specialty Conference on Performance Confirmation of Constructed Geotechnical Facilities. [S.l.]：[s.n.]，2000：456-466. " target="_blank">
[11]	HAN J，AKINS K. Use of geogrid-reinforced and pile-supported earth structures[C]// Proceedings of International Deep Foundation Conference. Orlando：[s.n.]，2002：668-679. " target="_blank">
[17]	雷金波，张少钦，雷呈凤，等. 带帽刚性桩复合地基荷载传递特性研究[J]. 岩土力学，2006，27(8)：1 322-1 326.(LEI Jinbo，ZHANG Shaoqin，LEI Chengfeng，et al. Peculiarity study on load transfer of rigid pile with cap composite foundation[J]. Rock and Soil Mechanics，2006，27(8)：1 322-1 326.(in Chinese)) " target="_blank">
[18]	陈仁朋，徐正中，陈云敏. 桩承式加筋路堤关键问题研究[J]. 中国公路学报，2007，20(2)：7-12.(CHEN Renpeng，XU Zhengzhong，CHEN Yunmin. Research on key problems of pile supported reinforced embankment[J]. China Journal of Highway and Transport，2007，20(2)：7-12.(in Chinese))