蜗壳钢衬下混凝土脱空缺陷检测中中子无损探测法的应用  

THE APPLICATION OF NEUTRON NON-DESTRUCTIVE DETECTION METHOD TO CAVITY DEFECTS DETECTION OF CONCRETE UNDER THE SPIRAL CASE STEEL LINER

作　　者：裴少英[1] 涂善波[1] 高拴会[1] 

机构地区：[1]黄河勘测规划设计有限公司工程物探研究院,河南郑州450003

出　　处：《物探与化探》2013年第2期363-367,共5页Geophysical and Geochemical Exploration

摘　　要：在水利水电工程中经常有用钢板做里衬的混凝土结构物,由于某些原因,这些结构物里经常存在脱空缺陷,需要采取一些无损检测技术来确定是否存在缺陷及其位置、大小等,为随后的处理提供科学的依据。笔者采用中子无损探测技术,对大渡河某水电站压力管道中蜗壳刚衬下混凝土进行脱空工程检测,结果表明该刚衬下混凝土存在部分脱空区,并查明了脱空区面积大小及其深度范围,说明中子无损探测技术在该水电站蜗壳钢衬混凝土结构物脱空缺陷检测上达到了理想的应用效果。The steel plate is usually used as the liner of some concrete structures in hydropower projects.For some reason,there are usually some cavity defects in these structures.It is hence necessary to employ some non-destructive detection technology to detect these structures so as to determine the existence or nonexistence of the defects and confirm their locations and sizes.These measures provde scientific basis for the subsequent processing.The authors adopted this technology to detect cavity defects in concrete under the spiral case steel liner in a pressure pipe of a Dadu River hydropower station project.The detection results have revealed some cavity defects in the concrete and found their areas,sizes and depth ranges.The results show that the non-destructive detection technology applied in detecting cavity defects of concrete under the spiral case steel liner has an ideal effect.

关 键 词：混凝土 脱空缺陷 蜗壳 中子无损探测 钢衬 

分 类 号：P631.6[天文地球—地质矿产勘探]