冲击映像方法在水工结构渗漏病害检测中的应用

发布时间：2019-01-19 08:56

【摘要】：冲击映像法作为一种基于弹性波反射原理的无损检测方法,具有检测速度快、结果直观可视的特点,能够快速的评价地下介质沿垂直和水平方向的变化。针对水工结构及其下部基础的特点和常见病害,以弹性波在多层介质不同交界面的传播特性为理论基础,采用有限元动力法分析弹性波传播特性与缺陷位置、缺陷大小的相关性,特别关注介质表面的冲击响应能量与缺陷位置、大小的关系,明确介质中缺陷的平面分布情况,评价了该检测方法的误差影响因素。在此基础上,以具体水工结构渗水病害检测工程为背景,详细探讨了适用于水工结构检测的数据采集、分析、结果修正和结果可视化处理的方法,最后评价了缺陷分布和可能存在的渗透路径。
[Abstract]:As a nondestructive testing method based on the principle of elastic wave reflection, the impact mapping method has the characteristics of high detection speed and visual results. It can quickly evaluate the changes of underground media along the vertical and horizontal direction. In view of the characteristics and common diseases of hydraulic structures and their underlying foundations, based on the propagation characteristics of elastic waves at different interfaces of multi-layer media, the finite element dynamic method is used to analyze the propagation characteristics and defect positions of elastic waves. The correlation of defect size, especially the relationship between the impact response energy of the dielectric surface and the location and size of the defect, the plane distribution of the defect in the medium is clarified, and the error influencing factors of the method are evaluated. On this basis, the methods of data acquisition, analysis, result correction and visual processing of hydraulic structure are discussed in detail, based on the concrete hydraulic structure seepage disease detection project. Finally, the distribution of defects and the possible osmotic paths are evaluated.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;
【基金】：国家自然科学基金项目(11372180)
【分类号】：TV698

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