双曲线模型预测单桩竖向极限承载力的研究  

Research on the Prediction of Ultimate Vertical Bearing Capacity of a Single Pile Using Hyperbolic Model

作　　者：周清[1] 徐小丽[1] 黄岚[1] 陈云峰 

机构地区：[1]南通大学建筑工程学院,江苏南通226019 [2]南通和信工程勘测设计院有限公司,江苏南通226007

出　　处：《江苏建筑》2012年第6期85-88,共4页Jiangsu Construction

基　　金：南通大学引进人才启动费项目(B25);南通大学前期预研项目(11ZY006)

摘　　要：通过对2种不同桩型单桩竖向静载试验的研究,采用双曲线模型对单桩竖向极限承载力进行拟合预测分析。研究表明:(1)利用双曲线模型拟合荷载-沉降曲线,拟合的相关系数平均值为0.98627,拟合程度良好,拟合曲线与实测的曲线吻合程度较高。(2)对荷载-沉降曲线为陡降型的桩,用折减系数法来预测单桩竖向极限承载力,研究出预应力混凝土管桩和预制钢筋混凝土方桩的折减系数平均值分别为0.847和0.821,可供工程应用参考。The vertical static load tests of a single pile for two different type of pile have been researched with hyperbolic model to fit and predict the ultimate vertical bearing capacity of a single pile.The results are as follows：（1）Using the hyperbolic model to fit load-settlement curve,the average value of related coefficient is 0.98627,it has a good degree of fitting and fitted curves agree well with measured curves.（2） Using reduction coefficient method to predict the ultimate vertical bearing capacity of a single pile for steep drop type loadsettlement curves,the average reduction coefficient of prestressed concrete pipe pile is 0.847;the average reduction coefficient of precast reinforced concrete square pile is 0.821,which can be reference to engineering application.

关 键 词：单桩竖向极限承载力 静载试验 双曲线模型 相关系数 折减系数法 

分 类 号：TU473.11[建筑科学—结构工程]