基于小波分析的冲击回波法预应力管道压浆质量检测
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摘要
介绍了冲击回波法理论及检测原理,通过采集不同注浆饱满度下的冲击回波信号,并采用小波分析方法,研究了主频对不同注浆饱满度的响应规律及其判断依据.通过比较实测主频和同等情况下全空管道的理论主频,判断了孔道的注浆质量.最后结合工程实例进行了检测研究,研究结果表明,冲击回波主频可以有效地评价主梁预应力孔道的注浆饱满情况.
At present,there is no mature and reliable method for testing of prestressed ducts grouting in China.The impact-echo Method is usually adopted for that.In this paper,the principles of impact-echo method and its testing are introduced at first,using wavelet analysis method,through data collection of impact-echo signal on different grouting compactness,evaluation criterion about a basic frequency with different grouting compactness is researched.Then,comparing a measured basic frequency with that in all empty duct under the same circumstances,the ducts grouting quality is judged.At last,with actual engineering,the results of the research show that the impact-echo method is effective to evaluate grout quality in prestressing ducts.
At present,there is no mature and reliable method for testing of prestressed ducts grouting in China.The impact-echo Method is usually adopted for that.In this paper,the principles of impact-echo method and its testing are introduced at first,using wavelet analysis method,through data collection of impact-echo signal on different grouting compactness,evaluation criterion about a basic frequency with different grouting compactness is researched.Then,comparing a measured basic frequency with that in all empty duct under the same circumstances,the ducts grouting quality is judged.At last,with actual engineering,the results of the research show that the impact-echo method is effective to evaluate grout quality in prestressing ducts.
引文
[1]李国平.预应力混凝土结构设计原理[M].北京:人民交通出版社,2000:1-20.
[2]李传平,刘耀武,张保和.公路桥梁140米长预应力孔道压浆质量控制[J].施工技术,2005,34(7):59-60.
[3]李宏男,孙鸿敏.小波分析在土木工程领域中的应用[J].世界地震工程,2003,19(2):16-22.
[4]王智丰,周先雁,晏班夫,等.冲击回波法检测预应力束孔管道压浆质量[J].振动与冲击,2009,28(1):166-169.
[5]杜拱辰.40年来预应力混凝土在我国房屋建筑工程中的应用与发展[J].土木工程学报,1997,30(1):3-15.
[6]杨天春,易伟建,鲁光银,等.预应力T梁束孔管道压浆质量的无损检测试验研究[J].振动工程学报,2006,19(3):411-415.
[7]孙延奎.小波分析及其应用[M].北京:机械工业出版社,2001:47-63.
[2]李传平,刘耀武,张保和.公路桥梁140米长预应力孔道压浆质量控制[J].施工技术,2005,34(7):59-60.
[3]李宏男,孙鸿敏.小波分析在土木工程领域中的应用[J].世界地震工程,2003,19(2):16-22.
[4]王智丰,周先雁,晏班夫,等.冲击回波法检测预应力束孔管道压浆质量[J].振动与冲击,2009,28(1):166-169.
[5]杜拱辰.40年来预应力混凝土在我国房屋建筑工程中的应用与发展[J].土木工程学报,1997,30(1):3-15.
[6]杨天春,易伟建,鲁光银,等.预应力T梁束孔管道压浆质量的无损检测试验研究[J].振动工程学报,2006,19(3):411-415.
[7]孙延奎.小波分析及其应用[M].北京:机械工业出版社,2001:47-63.
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