大直径超长灌注桩水平承载性能的参数敏感性

doi:10.16285/j.rsm.2016.1497

›› 2018, Vol. 39 ›› Issue (5): 1825-1833.doi: 10.16285/j.rsm.2016.1497

大直径超长灌注桩水平承载性能的参数敏感性

李洪江^{1, 2}，童立元^{1, 2}，刘松玉^{1, 2}，包红燕³，杨涛^{1, 2}

1. 东南大学岩土工程研究所，江苏南京 210096；2. 东南大学江苏省城市地下工程与环境安全重点实验室，江苏南京 210096； 3. 江苏省建设工程设计施工图审核中心，江苏南京 210036

收稿日期:2016-06-20 出版日期:2018-05-11 发布日期:2018-06-12
通讯作者: 童立元，男，1975年生，副教授，博士生导师，主要从事桩基础与地下工程方面的研究。E-mail：101010519@seu.edu.cn E-mail:lihongjiang55@126.com
作者简介:李洪江，男，1989年生，博士研究生，主要从事桩基础与地下工程方面的研究
基金资助:
国家重点研发计划项目（No. 2016YFC0800201）；江苏省建设系统科技项目资助（No. 2014ZD66）；中央高校基本科研业务费专项资金和江苏省普通高校研究生科研创新计划资助项目（No. KYLX16_0244）。

Parameter sensitivity of horizontal bearing capacity of large diameter and super-long bored pile

LI Hong-jiang^{1, 2}, TONG Li-yuan^{1, 2}, LIU Song-yu^{1, 2}, BAO Hong-yan³, YANG Tao^{1, 2}

1. Institute of Geotechnical Engineering, Southeast University, Nanjing, Jiangsu 210096, China; 2. Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Southeast University, Nanjing, Jiangsu 210096, China; 3. Jiangsu Provincial Construction Drawing Examination & Verification Center, Nanjing, Jiangsu 210036, China

Received:2016-06-20 Online:2018-05-11 Published:2018-06-12
Supported by:
This work was supported by the National Key Research and Development Program of China (2016YFC0800201), the Construction Science and Technology Research Project of Jiangsu Province (2014ZD66), the Fundamental Research Funds for the Central Universities and the Graduate Student Scientific Research Innovation Program of Jiangsu Province (KYLX16_0244).

摘要/Abstract

摘要： 大直径超长灌注桩是高规格建（构）筑物桩基工程的发展趋势，但有关其水平承载性能的研究还较少。依托江苏靖江文化中心大直径超长灌注桩建设项目，通过现场试桩试验获得了桩身水平受力及承载变形特征。采用孔压静力触探（CPTU）测试p-y曲线法构建了大直径超长灌注桩水平承载数值计算模型，在与现场试桩结果比对验证之后，进一步研究了桩径尺寸效应、桩顶嵌固形式、桩身倾角、竖向载荷对大直径超长灌注桩的影响规律。最后通过计算各影响因素的参数敏感度，实现了对大直径超长灌注桩水平承载性能参数敏感性的客观定量评价。研究结果表明：原位测试CPTU可以很好地应用于大直径超长灌注桩的水平承载分析，大直径超长灌注桩参数敏感度由大到小依次为：桩顶嵌固形式、尺寸效应、竖向荷载、桩身倾角。

关键词: 大直径超长灌注桩, 水平承载, 参数敏感性, 孔压静力触探（CPTU）, p-y曲线, 水平载荷试验

Abstract: The large diameter and super-long pile is the development trend of the pile foundation engineering of high standard buildings. But there is few research about its horizontal bearing characteristics. In this paper, the horizontal deformation and stress distribution of the large diameter and super-long pile were obtained by pile test in field of Jingjiang cultural center construction project. The piezocone penetration test (CPTU) p-y curve method was used to construct the numerical model of the large diameter and super-long pile under horizontal loading. After comparison and verification with the results of pile test, the numerical model was used to further study the influence of size effect, embedding types, inclination of pile and vertical loads on the horizontal bearing performance. Finally, the quantitative evaluation about the parameter sensitivity of the large diameter and super-long pile was achieved by calculation of different sensitivity values. The research results show that in-situ CPTU test is a very good application in analysis of horizontal bearing capacity of the large diameter and super-long pile, and the order of sensitivity values is: embedding type, size effect, vertical load, inclination.

Key words: large diameter and super-long bored pile, horizontal bearing capacity, parameter sensitivity, piezocone penetration test(CPTU), p-y curve, lateral load test

中图分类号:

TU 473

李洪江，童立元，刘松玉，包红燕，杨涛, . 大直径超长灌注桩水平承载性能的参数敏感性[J]. , 2018, 39(5): 1825-1833.

LI Hong-jiang, TONG Li-yuan, LIU Song-yu, BAO Hong-yan, YANG Tao, . Parameter sensitivity of horizontal bearing capacity of large diameter and super-long bored pile[J]. , 2018, 39(5): 1825-1833.

参考文献

相关文章 15

[1]	张小玲, 朱冬至, 许成顺, 杜修力, . 强度弱化条件下饱和砂土地基中桩−土相互作用p-y曲线研究[J]. 岩土力学, 2020, 41(7): 2252-2260.
[2]	贺志军, 雷皓程, 夏张琦, 赵炼恒. 多层软土地基中单桩沉降与内力位移分析[J]. 岩土力学, 2020, 41(2): 655-666.
[3]	刘成禹，郑智享，. 改进的基于p-y曲线的基坑围护结构计算方法[J]. , 2018, 39(S1): 446-452.
[4]	赵明华，陈耀浩，杨超炜，肖尧. 基于有限杆单元法的陡坡基桩非线性分析[J]. , 2018, 39(8): 3020-3028.
[5]	李亚，李书兆，张超. 黏土中自升式钻井船插桩对邻近桩基影响的分析方法[J]. , 2018, 39(5): 1891-1900.
[6]	李晓明，赵庆斌，杨祈敏，赵其华，丁梓涵,. 碎石土及碎石土-基岩地基斜坡场地m值研究[J]. , 2018, 39(4): 1327-1336.
[7]	刘红军，杨奇，. 局部冲刷对风机支撑系统承载性能的影响[J]. , 2018, 39(2): 722-727.
[8]	荣雪宁，徐日庆，冯苏阳，仇涛，. 基于拉格朗日乘数法的大弯矩水平受荷桩研究[J]. , 2017, 38(9): 2605-2612.
[9]	周立朵，孔纲强，彭怀风，顾红伟，朱希，. 倾斜荷载下群桩承载特性理论分析[J]. , 2017, 38(9): 2647-2654.
[10]	李洪江，童立元，刘松玉，顾明芬，陆湛秋,. 软土地基刚柔性桩水平承载位移控制标准研究[J]. , 2017, 38(9): 2676-2682.
[11]	任连伟，顾红伟，彭怀风，周杨，. 三种工况下扩底楔形桩承载特性模型试验研究[J]. , 2017, 38(7): 1887-1893.
[12]	刘红军，张浩，李洪江，尹燕京,. 软黏土中伞式吸力锚基础水平承载有限元分析[J]. , 2017, 38(11): 3325-3331.
[13]	李洪江，刘松玉，童立元, . 基于应力增量的单桩p-y曲线分析方法[J]. , 2017, 38(10): 2916-2922.
[14]	冯君，张俊云，朱明，江南,. 软土地层高承台桥梁群桩基础横向承载特性研究[J]. , 2016, 37(S2): 94-104.
[15]	邹飞，龙万学，李亮,. 楔形刀具侵入岩石损伤破坏影响因素的理论分析及数值模拟[J]. , 2016, 37(7): 2101-2108.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

大直径超长灌注桩水平承载性能的参数敏感性

Parameter sensitivity of horizontal bearing capacity of large diameter and super-long bored pile

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0