基于一维波动方程的桩基完整性检测方法  

Detection Method of Pile Foundation Integrity Based on One⁃dimensional Wave Equation

作　　者：曾润忠[1] 金晨 胡文韬[1] ZENG Runzhong;JIN Chen;HU Wentao(Key Laboratory of Geotechnical Engineering Safety and Control of Jiangxi Province,East China Jiaotong University,Nanchang 330013,China;902 Geological Team,Jiangxi Provincial Bureau of Geology and Mineral Exploration and Development,Nanchang 338000,China)

机构地区：[1]华东交通大学江西省岩土工程基础设施安全与控制重点实验室,南昌330013 [2]江西省地质矿产勘查开发局九〇二地质大队,南昌338000

出　　处：《铁道建筑》2020年第6期101-104,共4页Railway Engineering

基　　金：江西省科技开发重点项目(20141BBE50032)。

摘　　要：通过以一维应力波理论为基础的低应变反射波法分析出病害处的波形传播规律及特征,并运用有限元数值方法对混凝土桩基某处出现不连续、离析、空洞等缺陷进行分析,得到频域和时域导纳曲线。将低应变反射波法得到的结果与有限元数值模拟结果进行对比分析,结合现场钻芯法验证,可确定桩身缺陷程度及类型,为提高桩基质量检测的精确性和可靠性提供参考依据。Based on the one-dimensional stress wave theory,the low strain reflected wave method was used to analyze the wave propagation law and characteristics of the disease.The finite element numerical method was used to analyze the discontinuity,segregation,cavity and other defects in the concrete pile foundation,and the admittance curves in frequency domain and time domain were obtained.By comparing the results obtained by the low-strain reflected wave method with the finite element numerical simulation results,combined with the verification of the on-site core drilling method,the degree and type of pile defects can be determined,which can provide reference for improving the accuracy and reliability of pile foundation quality inspection.

关 键 词：铁路桥梁 桩基检测 一维波动方程 理论分析 低应变法 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]