百色水利枢纽主坝碾压混凝土密实性探测
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摘要
针对广西百色水利枢纽主坝碾压混凝土工程竣工报告中提出的密实性疑问,提出了采用地质雷达开展典型坝段的密实度检测方案和检测过程,并根据地质雷达反射波传播速度、形态、强弱及其变化等因素来判定目标体深度及缺陷性质。检测结果表明在2A-3A和7A坝段200m高程廊道所探测的混凝土总体均匀,探测到的1处混凝土缺陷范围较小且不连续,缺陷占整个坝段的体积比例小,对坝体整体结构稳定无明显影响。
In view of the doubts about compactness raised in the completion report of the roller compacted concrete project of the main dam at Baise control project in Guangxi Province,the compactness detection scheme and process for typical dam sections are proposed by using geological radar,and the depth and deficiency of the target body are determined according to the propagation speed,shape,strength and variation of the reflected wave of the geological radar. The test results show that the concrete detected in 200 m elevation corridor of 2 A-3 A and 7 A dam sections is generally uniform,while one detection of concrete defect is small and discontinuous,without significant impact on the overall structural stability of the dam.
In view of the doubts about compactness raised in the completion report of the roller compacted concrete project of the main dam at Baise control project in Guangxi Province,the compactness detection scheme and process for typical dam sections are proposed by using geological radar,and the depth and deficiency of the target body are determined according to the propagation speed,shape,strength and variation of the reflected wave of the geological radar. The test results show that the concrete detected in 200 m elevation corridor of 2 A-3 A and 7 A dam sections is generally uniform,while one detection of concrete defect is small and discontinuous,without significant impact on the overall structural stability of the dam.
引文
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[3]吕祥锋,周宏源,张爱江.地质雷达联合数字成像对地下疏空病害定量探测应用研究[J].市政技术,2017,35(6):165-169.
[4]朱燕梅,范泯进,沙椿.混凝土缺陷超声横波三维成像法探测精度影响因素的研究[J].工程地球物理学报,2016,13(06):739-745.
[5]左志军,谢琪,贾杰南.物探方法检测混凝土质量缺陷应用及数据特征研究[J].水利科技与经济,2018,24(04):65-69.
[6]杨威,刘兆勇,邓迪.地质雷达在钢筋混凝土缺陷检测中的应用[J].物探化探计算技术,2017,39(3):340-345.
[7]阮志武.地质雷达在隧洞混凝土无损检测中的应用[J].云南水力发电,2017,33(03):35-40.