大型混凝土输水管涵浇筑质量GPR检测研究  

Detecting on Pouring Defects of Large-scale Concrete Pipe and Box Culvert with GPR Method

作　　者：王淼[1] 郭秀军[1] 罗辉 李永顺 李典基 蒋莆伟[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]山东省南水北调建设管理局,济南250000

出　　处：《南水北调与水利科技》2009年第6期211-215,共5页South-to-North Water Transfers and Water Science & Technology

基　　金："十一五"国家科技支撑计划项目(2006BABO4A02-5)

摘　　要：南水北调东线山东段穿黄河及小清河工程分别采用大型输水混凝土管道和箱涵形式。结构物浇筑质量采用具有无损检测能力的探地雷达方法(GPR)和超声波法进行检测。根据探地雷达(GPR)检测结果,分析了浇筑混凝土结构物中混凝土骨料集中、密实度不均;隐伏裂缝等缺陷及钢筋网分布状态的GPR图像典型异常特征。并基于GPR检测电磁波速和超声波速的对比,讨论了低含水率条件下GPR方法对混凝土强度的检测能力。large-scale concrete pipeline and box culvert were adopted to transport water crossing Yellow River and Xiaoqinghe River in South to North Water Diversion East Line Project.Ground Penetrating Radar（GPR） method and ultrasonic method were used to detect pouring defects in those concrete structures.By analysis of measured GPR sections,representative abnormal GPR images of different defects were given,which included uneven composition of concrete,porosity variation,hidden cracks and reinforcing steel bar mesh in concrete.Moreover,intensity of concrete also was been evaluated by contrasting velocity of GPR wave with that of ultrasonic wave while the water content of concrete is little.

关 键 词：南水北调 混凝土管涵 混凝土缺陷 探地雷达 无损检测 

分 类 号：TV68[水利工程—水利水电工程] TU528[建筑科学—建筑技术科学]