改进型低应变反射法在营运高速公路桥梁桩基检测中的应用  

Study onthe Application and Validation of Improved Low Strain Reflection Detection Method in Operating Highway Bridge Pile Foundation

作　　者：孙晓立 刘建磊[2] 

机构地区：[1]广东华路交通科技有限公司,广州510420 [2]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《上海公路》2013年第4期54-57,11,共4页Shanghai Highways

基　　金：广东省交通运输厅科技项目(2009-02-012)

摘　　要：低心变反射法是新建桥梁桩基完整性检测的常用方法之一,然而传统的低应变反射法对于营运高速公路中含承台桩基完整性检测存在较大的难度。为此,提出了改进型低应变检测方法,即在基桩中心对应的承台顶部钻孔,将带有磁座的传感器安装在被测桩基础的顶面。为了评价改进型低应变反射法的实际应用效果,将其用于检测广东省某营运高速公路特大桥的桩基完整性,并同时进行了钻芯法进行验证。The low strain reflection method is a common method for the new bridge piles integrity test,but it is difficult that the traditional method for low strain is used to test operating highway pile foundation integrity.This paper presents an improved low strain detection methods,which will need to drill at the top center cap of the pile,the sensors with the magnet are mounted on the top surface of the test pile foundation.In order to evaluate this method in the practical application,it is used to detect piles integrity of the Guangdong Provincial Expressway Bridge and verified by the core drilling method.

关 键 词：低应变反射法 营运高速公路 桥梁 桩基 

分 类 号：U445.551[建筑科学—桥梁与隧道工程]