南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
SOUTH-TO-NORTH WATER
2009年
6期
211-215
,共5页
王淼%郭秀军%罗辉%李永顺%李典基%蒋莆伟
王淼%郭秀軍%囉輝%李永順%李典基%蔣莆偉
왕묘%곽수군%라휘%리영순%리전기%장보위
南水北调%混凝土管涵%混凝土缺陷%探地雷达%无损检测
南水北調%混凝土管涵%混凝土缺陷%探地雷達%無損檢測
남수북조%혼응토관함%혼응토결함%탐지뢰체%무손검측
South-to-North Water Diversion%concrete pipe and culvert%concrete defects%GPR%no destructive test
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.
南水北調東線山東段穿黃河及小清河工程分彆採用大型輸水混凝土管道和箱涵形式.結構物澆築質量採用具有無損檢測能力的探地雷達方法(GPR)和超聲波法進行檢測.根據探地雷達(GPR)檢測結果,分析瞭澆築混凝土結構物中混凝土骨料集中、密實度不均;隱伏裂縫等缺陷及鋼觔網分佈狀態的GPR圖像典型異常特徵.併基于GPR檢測電磁波速和超聲波速的對比,討論瞭低含水率條件下GPR方法對混凝土彊度的檢測能力.
남수북조동선산동단천황하급소청하공정분별채용대형수수혼응토관도화상함형식.결구물요축질량채용구유무손검측능력적탐지뢰체방법(GPR)화초성파법진행검측.근거탐지뢰체(GPR)검측결과,분석료요축혼응토결구물중혼응토골료집중、밀실도불균;은복렬봉등결함급강근망분포상태적GPR도상전형이상특정.병기우GPR검측전자파속화초성파속적대비,토론료저함수솔조건하GPR방법대혼응토강도적검측능력.
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 pouting defects in those concrete structures. By analysis of measured GPR sections, representative abnormal GPR images of different defects were given, which in-eluded uneven composition of concrete, porosity variation, hidden cracks and reinforcing steel bar mesh in concrete. Moreover, intensity of con-crete also was been evaluated by contrasting velocity of GPR wave with that of ultrasonic wave while the water content of concrete is little.
