Y型沉管灌注桩及其承载特性

王新泉; 陈永辉; 刘汉龙; 徐立新

doi:10.13204/j.gyjz200811017

Y型沉管灌注桩及其承载特性

doi: 10.13204/j.gyjz200811017

1.
1. 河海大学岩土力学与堤坝工程教育部重点实验室河海大学岩土工程科学研究所,南京 210098;
2.
2. 浙江省交通规划设计研究院,杭州 310006

基金项目:

江苏省333高层次人才项目资助

详细信息

作者简介:
王新泉,男,1981年1月出生博士研究生.E-mail:fount352@sina.com

计量
- 文章访问数: 85
- HTML全文浏览量: 10
- PDF下载量: 83
- 被引次数: 0
出版历程
- 收稿日期: 2008-02-15
- 刊出日期: 2008-11-20

THE Y-SHAPED VIBRO-PILE AND LOAD BEARING CHARACTERISTICS

1.
1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University;Geotechnical Research Institute,Hohai University Nanjing 210098;
2.
2. Zhejiang Provincial Plan Design &Research Institute of Communications Hangzhou 310006

摘要

摘要: 对Y型沉管灌注桩技术原理予以介绍,针对工程界对Y型桩有别于传统桩型的反拱曲面是否存在摩阻弱化效应的忧虑进行圆形桩、Y型桩现场对比试验。试验结果表明:Y型桩承载力的增加与侧表面积的增加效果同样明显,反拱曲面尽管可能存在摩阻不均匀发挥的特性,但未发现其异形摩阻弱化效应。结合三个工程实例的静荷载检测结果,对Y型沉管灌注桩的承载特性进行分析;针对Y型桩有别于传统桩型的过度充盈反而削减承载力的特点,提出在计算Y型桩极限承载力时引入充盈折减系数,并对求解充盈折减系数的方法予以介绍。
- Y型沉管灌注桩 /
- 静荷载试验 /
- 极限承载力 /
- 充盈折减系数
Abstract: Firstly,the technique principle of Y-shaped vibro-pile is introduced.It is concluded that the skin friction characteristic of both positive circular arc surface and inverse arc surface is basically the same,which is validated by the contrast of static load test between circular pile and Y-shaped vibro-pile.Although the asymmetry is likely,the skin friction of inverse arc surface is not reduced.Combining with the three practical projects,the load bearing characteristics and working mechanism of Y-shaped vibro-pile are studied.The fullness depreciation coefficient is brought forward and analyzed in calculating ultimate bearing capacity aiming at the characteristic of Y-shaped vibro-pile,and its physical meaning and calculation method are also introduced.
- Y-shaped vibro-pile /
- static loading test /
- ultimate bearing capacity /
- full depreciation coefficient