[1]李洪江,杨昊坤,刘松玉,等.可液化地基处理前后单桩水平承载动力响应特征[J].东南大学学报(自然科学版),2016,46(5):1098-1102.[doi:10.3969/j.issn.1001-0505.2016.05.034]
 Li Hongjiang,Yang Haokun,Liu Songyu,et al.Lateral dynamic bearing response properties of single pile before and after liquefaction ground treatment[J].Journal of Southeast University (Natural Science Edition),2016,46(5):1098-1102.[doi:10.3969/j.issn.1001-0505.2016.05.034]
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可液化地基处理前后单桩水平承载动力响应特征()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第5期
页码:
1098-1102
栏目:
土木工程
出版日期:
2016-09-20

文章信息/Info

Title:
Lateral dynamic bearing response properties of single pile before and after liquefaction ground treatment
作者:
李洪江12杨昊坤3刘松玉12童立元12顾琴芬4
1东南大学岩土工程研究所, 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, 南京 210096; 3南京大学地理与海洋科学学院, 南京 210093; 4江苏省建设工程设计施工图审核中心, 南京 210036
Author(s):
Li Hongjiang12 Yang Haokun3 Liu Songyu12 Tong Liyuan12 Gu Qinfen4
1Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
2Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Southeast University, Nanjing 210096, China
3School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China
4Jiangsu Provincial Construction Drawing Examination and Verification Center, Nanjing 210036, China
关键词:
液化 桩基 p-y曲线 孔压静力触探(CPTU) 水平承载力
Keywords:
liquefaction pile foundation p-y curve piezocone penetration test(CPTU) lateral bearing capacity
分类号:
TU473
DOI:
10.3969/j.issn.1001-0505.2016.05.034
摘要:
为了研究可液化地基处理前后单桩水平承载动力响应问题,以宿迁金鹰工程可液化场地为依托,采用基于CPTU测试的p-y(土抗力-桩挠度)曲线法,构建了单桩水平动力承载数值计算模型.分析了不同加载振幅和振动次数下的单桩水平循环加载特征,比较了可液化地基处理前后的单桩水平承载动力响应规律.结果表明:可液化地基处理后单桩水平动力承载能力增强,桩周土抗液化能力提升,桩身截面最大弯矩上移,桩顶荷载传递深度降低;在桩顶水平循环加载作用下,桩身变形和弯矩随加载振幅和振动次数的增加而增大;十字翼共振法处理可液化场地对提升桩基水平承载力具有显著效果.
Abstract:
To investigate the lateral dynamic bearing response properties of single pile before and after liquefaction ground treatment, the numerical calculation model for single pile under lateral dynamic loadings was proposed by using the p-y(soil resistance-pile deflection)curve method from piezocone penetration test(CPTU)data based on the liquefaction ground of the Golden Eagle project in Suqian. The horizontal bearing capacities of single pile under cyclic loading conditions with different vibration amplitudes and times were studied, and the corresponding dynamic response rules of single pile before and after liquefaction ground treatment were compared. The results show that after liquefaction ground treatment, both the horizontal bearing capacity of single pile and the soil liquefaction resistance increase, and the location of the pile maximum bending moment is up but the transfer depth of the pile top loading decreases. Both the pile deflection and the bending moment increase with the increase of the vibration amplitude and the vibration time under lateral cyclic load applied in pile top. Using the resonant compaction method with a criss cross section vibratory probe in liquefied foundation exhibits obvious effect for increasing the lateral bearing capacity of the pile.

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备注/Memo

备注/Memo:
收稿日期: 2016-03-20.
作者简介: 李洪江(1989—),男,博士生;刘松玉(联系人),男,博士,教授,博士生导师,liusy@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(41572273,51279032)、“十二五”国家科技支撑计划资助项目(2012BAJ01B02)、江苏省建设系统科技计划资助项目(2014ZD66).
引用本文: 李洪江,杨昊坤,刘松玉,等.可液化地基处理前后单桩水平承载动力响应特征[J].东南大学学报(自然科学版),2016,46(5):1098-1102. DOI:10.3969/j.issn.1001-0505.2016.05.034.
更新日期/Last Update: 2016-09-20