1.国家海洋局南海调查技术中心,广东 广州510275
2.自然资源部海洋环境探测技术与应用重点实验室,广东 广州510275
周普志(1981年生),男;研究方向:海洋地球物理;E-mail:zhoupuzhi@smst.gz.cn
纸质出版日期:2021-07-25,
网络出版日期:2020-09-15,
收稿日期:2020-05-06,
录用日期:2020-05-22
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周普志,李正元,沈泽中等.海底光缆磁法探测技术研究与应用[J].中山大学学报(自然科学版),2021,60(04):100-110.
ZHOU Puzhi,LI Zhengyuan,SHEN Zezhong,et al.Research and application of magnetic detection technology for submarine optical cable[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(04):100-110.
周普志,李正元,沈泽中等.海底光缆磁法探测技术研究与应用[J].中山大学学报(自然科学版),2021,60(04):100-110. DOI: 10.13471/j.cnki.acta.snus.2020.05.06.2020B050.
ZHOU Puzhi,LI Zhengyuan,SHEN Zezhong,et al.Research and application of magnetic detection technology for submarine optical cable[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(04):100-110. DOI: 10.13471/j.cnki.acta.snus.2020.05.06.2020B050.
在光缆的路由调查过程中,已铺设的光缆因目标小,且有一定埋设深度,侧扫声呐或浅地层剖面等声学手段难以识别。文章介绍了海底光缆的结构和磁性特征,重点分析了远供电源系统供电情况下,海底光缆磁异常正演曲线特征,并选用与正演模型极为相似的光缆进行实测,验证了海底光缆以远供系统电流产生的磁场特征为主、磁异常强度与电流强度和埋设深度有关、光缆位置位于异常曲线几何中心。根据已铺设光缆的磁异常正演曲线特征,可采用磁法探测手段结合水下定位技术,对光缆进行精确定位。以湾区互联海缆(BtoBE)浅水区磁法探测为例,对调查过程中的测线布设、仪器设备、数据处理、成果图件绘制以及交越点位置的判定进行了介绍。文章对于解答海底光缆异常成因,实施类似光缆勘察项目中的磁力探测具有借鉴作用。
During the submarine optical cable route survey, the laying cable is hard to be detected by sonar detection as side-scan sonar or shallow stratum profile instrument, because of its slender shape and buried depth,this paper introduces the structure and magnetic characteristics of the submarine optical cable, and emphatically analyzes the magnetic anomaly forward curve of the submarine optical cable with remote power supply. We detected actual the optical cable that is similar to the forward model. It is verified that the submarine optical cable magnetic anomaly is mainly generated by the current, and is related to the current intensity and the depth of burial. The position of the optical cable is at the geometric center of the magnetic anomaly curve. According to the magnetic anomaly forward curve feature of laying cable, the magnetic detection method can be used with the underwater positioning system to pinpoint the optical cable. Taking China shallow water section of Bay to Bay Express cable (BtoBE) as an example. We discusses the surveying line layout, equipments, data processing, profile-plan drawing. This paper has a reference meaning for explaining the magnetic anomaly of submarine optical cables and implementing magnetic detection in similar projects.
海底光缆磁法探测正演曲线
submarine optical cablemagnetic explorationforward curve
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