富绥松花江大桥桩基静载对比试验研究  

Static loading comparative test for pile foundation of Fujin-Suibin Songhua River Bridge

作　　者：聂玉东[1,2] 周儒夏[3,4] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150080 [2]黑龙江省公路勘察设计院,哈尔滨150080 [3]东南大学土木工程学院,南京210096 [4]南通市公路管理处,江苏南通226001

出　　处：《岩土力学》2012年第5期1327-1332,共6页Rock and Soil Mechanics

基　　金：西部交通建设科技项目(No.2009318494041)

摘　　要：富锦-绥滨松花江大桥基础采用直径2.0 m的钻孔灌注桩。通过数据采集,由锚桩法测得的45 m试桩和自平衡测得的70 m试桩上段桩的荷载-沉降关系、竖向承载特性、桩侧摩阻力等进行对比分析。分析结果表明:在极限状态下,两者位移相差14.97 mm,侧阻力相差7.30%;长、短试桩各土层桩侧阻力的实测值都满足要求。在桩-土体系破坏之前、相同荷载条件下,两者位移的差值有变大的趋势,相同土层的桩侧摩阻力相吻合。The bored piles 2.0 m in diameter is adopted in the foundation under Fujin-Suibin Songhua River Bridge.The in-situ static loading tests using conventional testing method and self-balanced method have been carried out on the test piles which are 45 m long and 70 m long for the latter one with upper shaft upon the load cell.By comparing the data of the testing piles from such two methods,the load-pile head settlement relationship and the vertical load-transfer behavior have been studied as well as the shaft friction resistance.It is indicated that,in the limit state,the displacement difference between the two is 14.97 mm;the side resistances difference is 7.30%;the side frictions of the two test pile meet the requirements.In the pile-soil system before destruction,under the same load conditions,the difference between the displacements gradually becomes larger.The pile skin friction in the same soil layer is consistent each other.

关 键 词：承载力 位移 摩阻力 

分 类 号：TU473[建筑科学—结构工程]