大直径嵌岩桥梁钻孔灌注基桩承载力自平衡法试验研究  

Experimental Research on Bearing Capacity of Cast-in-place for Large-diameter and Rock-socketed Bridge Pile with Self-balanced Method

作　　者：王博林[1] 马学宁[1] 王旭[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州交通大学学报》2012年第1期52-56,共5页Journal of Lanzhou Jiaotong University

摘　　要：采用自平衡试验方法,结合天水市经济开发区一号大桥工程,进行了3根钻孔灌注桩承载力现场试验(桩径1.2m,桩长分别为35,47,35m).在对测试数据进行整理和分析的基础上,对基桩的承载特性及桩侧阻的发挥特征进行研究,获取了必要的技术数据,验证了设计参数,可为该地区类似工程的基桩设计提供可靠参数.结果还表明:在桩基静载试验中,自平衡测试法是一种有效、方便的测试方法,测试取得很好的工程效果,可以在类似工程中推广使用.According to the project of No.1 bridge in Tianshui economic clevelopment zone,the bearing capacity test for 3 bored piles（diameter is 1.2 m,length is 35 m,47 m and 35 m,respectively） is carried out by using self-balanced method.On the basis of collecting and analyzing the test data,the bearing behavior of foundation pile and pile side resistance features are studied to obtain the necessary technical data,verify the design parameter and provide reliable parameters for pile design of the similar project in this area.The result indicates that the self-balanced method is an effective and simplified testing method in pile foundation static test,and it has attained excellent engineering effect and can be used widely in the similar project.

关 键 词：自平衡法 基桩 承载力 侧摩阻 

分 类 号：TU473[建筑科学—结构工程]