东南大学学报（自然科学版）2016，Vol.46Issue(5)：1098-1102,5.DOI:10.3969/j.issn.1001-0505.2016.05.034
可液化地基处理前后单桩水平承载动力响应特征
Lateral dynamic bearing response properties of single pile before and after liquefaction ground treatment
摘要
Abstract
To investigate the lateral dynamic bearing response properties of single pile before and af-ter liquefaction ground treatment,the numerical calculation model for single pile under lateral dy-namic loadings was proposed by using the p-y (soil resistance-pile deflection)curve method from pi-ezocone 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 differ-ent 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 lique-faction 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 in-crease with the increase of the vibration amplitude and the vibration time under lateral cyclic load ap-plied 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.关键词
液化/桩基/p-y曲线/孔压静力触探(CPTU)/水平承载力Key words
liquefaction/pile foundation/p-y curve/piezocone penetration test(CPTU)/lateral bear-ing capacity分类
建筑与水利引用本文复制引用
李洪江,杨昊坤,刘松玉,童立元,顾琴芬..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):1098-1102,5.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）． （）
