地质雷达检测桥梁预应力管道压浆饱满度的数据处理方法与应用
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摘要
预应力桥梁压浆管道注浆不饱满会引起预应力钢绞线锈蚀并大大降低其有效应力,直接影响桥梁的耐久性和安全性。地质雷达作为实体工程检测中常用的检测设备,压浆管道外层排列密集的钢筋干扰极易导致注浆缺陷信息几乎无法识别或者漏判。为此,首先采用有限差分数值方法模拟压浆管道中不同缺陷类型,然后对模拟数据进行偏移成像,压制钢筋的干扰信息,有效识别缺陷信号。以桥梁现场实测数据为例,应用上述方法,准确检测出了管道中缺陷信息,通过现场开窗,验证探测、处理效果,对实际工程应用具有指导意义。
The grouting pipe of the prestressed bridge which is not full will cause the corrosion and reduce the effective stress significantly of the steel strand,and this will also affect the durability and the safety of the bridge. Ground-penetrating radar( GPR) is a geophysical instrument used in bridge inspection,and the messages of the grouting defects can ' t be recognized because of the dense reinforced located the outer layer of the grouting pipe. Firstly, simulate the different type of defects located the grouting pipe with the method of finite difference numerical,then migrate the simulated data,this defects feature within the pipe has been significantly strengthened. Finally,take the experimental data for example,the affect of the reinforced has been repressed,the information of the defects in the pipeline has been accurately,and this will make a guiding role on the practical application.
The grouting pipe of the prestressed bridge which is not full will cause the corrosion and reduce the effective stress significantly of the steel strand,and this will also affect the durability and the safety of the bridge. Ground-penetrating radar( GPR) is a geophysical instrument used in bridge inspection,and the messages of the grouting defects can ' t be recognized because of the dense reinforced located the outer layer of the grouting pipe. Firstly, simulate the different type of defects located the grouting pipe with the method of finite difference numerical,then migrate the simulated data,this defects feature within the pipe has been significantly strengthened. Finally,take the experimental data for example,the affect of the reinforced has been repressed,the information of the defects in the pipeline has been accurately,and this will make a guiding role on the practical application.
引文
[1]徐向锋,叶见曙,钱培舒.后张法孔道压浆工艺若干问题探讨[J].水利水电科技进展,2005,25(5):64~67.
[2]阎毅志.后张法预应力管道压浆质量问题的原因及对策[J].山西交通科技,2007(6):67~68.
[3]姚华.扫描式冲击回波法检测后张预应力管道内缺陷的模型试验研究[D].重庆:交通大学,2008.
[4]李志强,周宗辉,徐东宇,等.基于超声波技术的混凝土无损检测[J].水泥工程,2010(3):72~75.
[5]戚秀真.混凝土超声无损检测层析成像技术研究[D].西安:长安大学,2006.
[6]赵永贵,刘浩,孙宇,等.隧道地质超前预报研究进展[J].地球物理学进展,2003,18(3):460~464.
[7]曾校丰,许维进,钱荣毅,等.水库坝体结构层的地质雷达高分辨率探测[J].地球物理学进展,2000,15(4):105~109.
[8]郝明,李玮,郭志强.采用物探技术进行路基挡土墙质量检测的研究[J].地球物理学进展,2003,18(3):440~444.
[9]曾昭发,田钢,丁凯.宽带探地雷达系统研究及在工程检测的应用[J].地球物理学进展,2003,18(3):455~460.
[10]黄玲,曾昭发,王者江,等.钢筋混凝土缺陷的探地雷达检测模拟与成像效果[J].物探与化探.2007,31(2):180~185.
[11]李大心.探地雷达方法与应用[M].北京:地质出版社.1994.
[12]Di Qingyun,Wang Miaoyue.Migration of ground-penetrating radar data with a finite-element method that considers attenuation and dispersion[J].Geophysics,2004,69(2):472.
[13]李学聪,刘伊克,常旭,等.基于F-K偏移和反偏移的地震道插值方法研究[J].地球物理学进展,2009,24(6):2020~2029.
[14]贺振华.反射地震资料偏移处理与反演[M].重庆:重庆大学出版社.1989.
[15]戴前伟,冯德山,王启龙,等.时域有限差分法在地质雷达二维正演模拟中的应用[J].地球物理学进展.2004,19(4):898~902.
[16]Yee K S Numerical Solution of Initial boundary value problems Involving Maxwll’s Equations in Isotropic Media[J].IEEETrans,1966,AP-14(3):302.
[2]阎毅志.后张法预应力管道压浆质量问题的原因及对策[J].山西交通科技,2007(6):67~68.
[3]姚华.扫描式冲击回波法检测后张预应力管道内缺陷的模型试验研究[D].重庆:交通大学,2008.
[4]李志强,周宗辉,徐东宇,等.基于超声波技术的混凝土无损检测[J].水泥工程,2010(3):72~75.
[5]戚秀真.混凝土超声无损检测层析成像技术研究[D].西安:长安大学,2006.
[6]赵永贵,刘浩,孙宇,等.隧道地质超前预报研究进展[J].地球物理学进展,2003,18(3):460~464.
[7]曾校丰,许维进,钱荣毅,等.水库坝体结构层的地质雷达高分辨率探测[J].地球物理学进展,2000,15(4):105~109.
[8]郝明,李玮,郭志强.采用物探技术进行路基挡土墙质量检测的研究[J].地球物理学进展,2003,18(3):440~444.
[9]曾昭发,田钢,丁凯.宽带探地雷达系统研究及在工程检测的应用[J].地球物理学进展,2003,18(3):455~460.
[10]黄玲,曾昭发,王者江,等.钢筋混凝土缺陷的探地雷达检测模拟与成像效果[J].物探与化探.2007,31(2):180~185.
[11]李大心.探地雷达方法与应用[M].北京:地质出版社.1994.
[12]Di Qingyun,Wang Miaoyue.Migration of ground-penetrating radar data with a finite-element method that considers attenuation and dispersion[J].Geophysics,2004,69(2):472.
[13]李学聪,刘伊克,常旭,等.基于F-K偏移和反偏移的地震道插值方法研究[J].地球物理学进展,2009,24(6):2020~2029.
[14]贺振华.反射地震资料偏移处理与反演[M].重庆:重庆大学出版社.1989.
[15]戴前伟,冯德山,王启龙,等.时域有限差分法在地质雷达二维正演模拟中的应用[J].地球物理学进展.2004,19(4):898~902.
[16]Yee K S Numerical Solution of Initial boundary value problems Involving Maxwll’s Equations in Isotropic Media[J].IEEETrans,1966,AP-14(3):302.