Diagnostic methods of quay wall with acoustic measurement systems
Diagnostic methods of quay wall with acoustic measurement systems
复制标题
声学测量系统码头壁诊断方法
DOI：
10.1109/oceans-bergen.2013.6608145
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
K. Akimoto
中科院分区：
文献类型：
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作者：
K. Abukawa;K. Mizuno;A. Asada;T. Igarashi;N. Kishi;K. Akimoto
我们使用了两个声学测量系统来评估码头墙的状态。港口码头岸壁的坍塌和下沉经常被报道，开发一种有助于防止坍塌的诊断方法已成为一个重要的问题。坍塌通常是由于码头墙内的气孔而发生的。因此，需要一个强大的，准确的诊断系统来检测气孔。因此，我们评估了一种新的诊断系统，可以评估内部和外部状态的水下码头墙。在这项研究中，利用两个声学测量系统：双频识别声纳（DIDSON）和窄波束参数浅地层剖面仪（SES 2000）。现场试验在日本北海道的岩内港（42° 59' N，140° 30' E）的受损码头壁上进行。DIDSON原始数据用于生成码头壁表面的图像拼接和三维图像。SES 2000创建了码头墙内部的声学剖面。利用DIDSON和SES2000采集的数据，重建了受损岸壁的外部和内部声学图像。我们发现了腐蚀孔和年龄恶化在一些调查点使用二维和三维图像。码头墙的状态进行了量化，并与潜水员直接水下测量获得的结果进行了比较。
We used two acoustic measurement systems to assess the state of a quay wall. Collapse and subsidence of quay walls at harbors are often reported, and the development of a diagnostic method to help prevent collapse has become a significant concern. Collapse normally occurs because of an air hole inside the quay wall. Therefore, a robust, accurate diagnostic system to detect air holes is required. Hence, we evaluated a new diagnostic system that can assess the inside and outside states of an underwater quay wall. In this study, two acoustic measurement systems are utilized: dual-frequency identification sonar (DIDSON) and a narrow-beam parametric sub-bottom profiler (SES2000). The field experiment was performed at Iwanai port in Hokkaido, Japan (42° 59' N, 140° 30' E) on a damaged quay wall. DIDSON raw data was used to generate an image mosaic and a three-dimensional image of the quay wall surface. SES2000 created an acoustic profile of the inside of the quay wall. External and internal acoustic images of the damaged quay wall were reconstructed by data collected by DIDSON and SES2000. We detected a corrosion hole and age deterioration at some survey points using two- and three-dimensional images. The state of the quay wall was quantified and compared with the results obtained from direct underwater measurements by a diver.