薄壁筒桩在滩涂土地区荷载传递特性现场试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (775 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要目前，国内外缺乏通过现场试验对薄壁筒桩荷载传递特性方面的研究，关于筒桩加固滩涂土地基的研究也较少。以温州浅滩一期半岛起步区首期1#地块为工程背景，进行现场荷载试验，以现场实测数据分析筒桩荷载传递特性。研究结果表明：在最大荷载作用下，较长的筒桩表现为端承摩擦型桩，桩侧摩阻力比约为75%，较短的筒桩表现为纯摩擦型桩，通过增加桩长、桩径可以提高筒桩竖向承载力；该类地区适合建5层以内工业厂房；桩身轴力自上向下逐渐发挥，桩身上部与下部土层摩阻力异步发挥；当上部土层达到极限侧摩阻力时，随着荷载的增加，出现侧阻软化现象，内侧摩阻力沿桩身自下向上逐渐发挥，为外侧摩阻力的20%～25%。采用簿壁筒桩加固滩涂土地基时，应考虑土芯内侧摩阻力对承载力的贡献。

	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 ：桩基础, 簿壁筒桩, 滩涂土, 现场实测数据, 荷载传递特性

Abstract：At present，few in-situ experiments have been conducted on thin-wall tubular piles about load transfer properties，and few studies have been reported about thin-wall tubular piles in tidal soil foundation treatment. Hence，based on the region #1 of the first-period peninsula in Wenzhou tidal land，in-situ static load tests were performed on thin-wall tubular piles. According to test data，load transfer properties were analyzed. The results indicate that about 75% of the load at pile head is shared by the outer frictional resistance，and the long piles work as end-bearing frictional piles under the maximum load while the short piles work as pure frictional piles. In order to increase bearing capacity，thin-wall tubular pile can be lengthened and widened appropriately. Industrial workshops within 5 floors can be built in this area. The axial force decreases with the increasing depth，and the outer frictional resistances of upper and lower soils work asynchronously. With the increase of load，side resistance softening happens when the frictional resistance of upper soil is up to the ultimate value. The inner frictional resistance is generated from the end of pile and it is about 20%–25% of the outer frictional resistance. When the thin-wall tubular piles are applied to reinforcement of tidal soil foundation，the contribution of inner frictional resistance of soil to bearing capacity should be taken into account.

Key words： pile foundations thin-wall tubular pile tidal soil data from in-situ measurement load transfer properties

收稿日期: 2011-12-06

引用本文:

叶强1，王军2，孙奇3，杨芳2，胡秀青1. 薄壁筒桩在滩涂土地区荷载传递特性现场试验研究[J]. 岩石力学与工程学报, 2013, 32(s1): 2951-2958.
YE Qiang1，WANG Jun2，SUN Qi3，YANG Fang2，HU Xiuqing1. IN-SITU EXPERIMENTAL STUDY OF LOAD TRANSFER PROPERTIES OF THIN-WALL TUBULAR PILE IN TIDAL SOIL AREA. , 2013, 32(s1): 2951-2958.

链接本文:

http://www.rockmech.org/CN/Y2013/V32/Is1/2951

[2]	周建. 大直径现浇混凝土薄壁筒桩竖向承载力计算研究[J]. 岩石力学与工程学报，2006，25(增1)：3 181-3 189.(ZHOU Jian. Study on vertical bearing capacity of large-diameter cast-in-situ thin-wall tubular pile[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：3 181-3 189.(in Chinese)) " target="_blank">
[5]	RANDOLPH M F，LEONG E C，HOULSBY G T. One-dimensional analysis of soil plugs in pipe piles[J]. Geotechnique，1991，41(4)：587-598. " target="_blank">
[7]	PAIK K，SALGADO R，LEE J，et al. Behavior of open-and closed-ended piles driven into sands[J]. Journal of Geotechnical and Geoenvironmental Engineering，2003，129(4)：296-306. " target="_blank">
[3]	卢建平，曹国宁，张志强，等. 新型桩基技术——现浇薄壁筒桩技术[J]. 岩石力学与工程学报，2004，23(4)：704-707.(LU Jianping，CAO Guoning，ZHANG Zhiqiang，et al. Innovation of technology of pile foundation engineering—cast-in-situ thin wall pot pile technology[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(4)：704-707.(in Chinese))
[14]	刘汉龙，顾湘生. 城际快速铁路软土路基沉降控制新技术[J]. 防灾减灾工程学报，2010，30(增)：181-186.(LIU Hanlong，GU Xiangsheng. New technology of soft roadbed settlement control on inter-city express highway[J]. Journal of Disaster Prevention and Mitigation Engineering，2010，30(Supp.)：181-186.(in Chinese)) " target="_blank">
[17]	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">
[6]	O?NEILL M W，RAINES R D. Load transfer for pipe piles in highly pressured dense sand[J]. Journal of Geotechnical Engineering，1991，117(8)：1 208-1 226. " target="_blank">
[9]	王哲，龚晓南，张玉国. 大直径灌注筒桩轴向荷载-沉降曲线的一种解析算法[J]. 建筑结构学报，2005，26(4)：123-129.(WANG Zhe，GONG Xiaonan，ZHANG Yuguo. Analysis of axial load-transfer of large-diameter cast-in-situ tubular pile[J]. Journal of Building Structures，2005，26(4)：123-129.(in Chinese))
[10]	费康，刘汉龙，高玉峰，等. 现浇混凝土薄壁管桩的荷载传递机制[J]. 岩土力学，2004，25(5)：764-768.(FEI Kang，LIU Hanlong，GAO Yufeng，et al. Load transfer mechanism for field pour concrete thin wall cased pile(PCC)[J]. Rock and Soil Mechanics，2004，25(5)：764-768.(in Chinese)) " target="_blank">
[12]	刘汉龙，费康，马晓辉，等. 振动沉模大直径现浇薄壁管桩技术及其应用(I)：开发研制与设计[J]. 岩土力学，2003，24(2)：164-168. (LIU Hanlong，FEI Kang，MA Xiaohui，et al. Cast-in-situ concrete thin-wall pipe pile with vibrated and steel tube mould technology and its application(I)：development and design[J]. Rock and Soil Mechanics，2003，24(2)：164-168.(in Chinese)) " target="_blank">
[13]	刘汉龙，郝小员，费康，等. 振动沉模大直径现浇薄壁管桩技术及其应用(II)：工程应用与试验[J]. 岩土力学，2003，24(3)：372-375.(LIU Hanlong，HAO Xiaoyuan，FEI Kang，et al. Field pour concrete thin wall cased pile technology and its application(II)：application and in-situ test[J]. Rock and Soil Mechanics，2003，24(3)：372-375.(in Chinese)) " target="_blank">
[15]	杨寿松，刘汉龙，周云东，等. 薄壁管桩在高速公路软基处理中的应用[J]. 岩土工程学报，2004，26(6)：750-754.(YANG Shousong，LIU Hanlong，ZHOU Yundong，et al. Application of cast-in-situ concrete thin-wall pipe piles in soft soil improvement of expressways[J]. Chinese Jounal of Geotechnical Engineering，2004，26(6)：750-754. (in Chinese))
[18]	中华人民共和国行业标准编写组. JGJ 106—2003建筑基桩检测技术规范[S]. 北京：中国建筑工业出版社，2003.(The Professional Standards Compilation Group of People?s Republic of China. JGJ 106—2003 Technical code for testing of building foundation piles[S]. Beijing：China Architecture and Building Press，2003.(in Chinese)) " target="_blank">
[1]	王哲，龚晓南，郭平，等. 大直径薄壁灌注筒桩在堤防工程中的应用[J]. 岩土工程学报，2005，27(1)：121-124.(WANG Zhe，GONG Xiaonan，GUO Ping，et al. Application of large-diameter thin-wall tubular pile with cast-in-situ concrete to embankment engineering[J]. Chinese Journal of Geotechnical Engineering，2005，27(1)：121-124.(in Chinese))
[4]	RANDOLPH M F，WROTH C P. An analysis of the vertical deformation of pile groups[J]. Geotechnique，1979，29(4)：423-439. " target="_blank">
[8]	朱向荣，叶俊能，姜贤放，等. 沉管灌注筒桩荷载-沉降曲线的拟合分析[J]. 科技通报，2003，19(6)：481-484.(ZHU Xiangrong，YE Junneng，JIANG Xianfang，et al. Fitting analysis of q-s curve of driven cast-in-place tubular piles[J]. Bulletin of Science and Technology，2003，19(6)：481-484.(in Chinese)) " target="_blank">
[11]	张晓健，刘汉龙，高玉峰，等. PCC单桩性状室内模型试验研究[J]. 岩土力学，2004，25(9)：1 495-1 498.(ZHANG Xiaojian，LIU Hanlong，GAO Yufeng，et al. Model test study on properties of PCC single pile[J]. Rock and Soil Mechanics，2004，25(9)：1 495-1 498. (in Chinese)) " target="_blank">
[16]	周云东，刘汉龙，李明生，等. 现浇薄壁管桩在威乌高速公路软基加固中的应用[J]. 岩土力学，2005，26(10)：1 671-1 674.(ZHOU Yundong，LIU Hanlong，LI Mingsheng，et al. Application of cast-in- place thin-wall concrete piles to Weihai—Wuhai highway[J]. Rock and Soil Mechanics，2005，26(10)：1 671-1 674.(in Chinese)) " target="_blank">