琼州海峡海底电缆路由沙波稳定性分析

500kV福徐甲线海底电缆路由自南向北横穿琼州海峡西口,北起广东徐闻县南岭村,南至海南澄迈县林诗村。海缆路由区海底地形复杂,沙波密集分布,在琼州海峡强大的水动力条件驱动下,海床稳定性较差,易发生冲刷现象。为防止海缆在洋流冲刷下出现裸露悬空,定期对路由地形地貌进行检测并分析路由区域冲刷及沙波的变化,掌握海缆保护情况,对薄弱环节及时采取保护措施,从而达到海底电缆安全稳定运行的目的。本文结合2015年及2017年海缆路由地形地貌检测成果,对路由区域沙波稳定性分析,掌握沙丘变化趋势,从而制定海缆保护措施。

The 500 kV Fuxu Line submarine cable route locate from south to north across the west of Qiongzhou Strait, from Nanling Village in Xuwen County, Guangdong Province, to Linshi Village, Chengmai County, Hainan. The submarine cable routing area has complex seabed topography and dense sand waves. Under the strong hydrodynamic conditions of Qiongzhou Strait, the stability of the seabed is poor and it is prone to erosion. In order to prevent the submarine cable from appearing under the ocean current scouring, the terrain and geomorphology of the route are detected regularly and the changes of the routing area and the sand wave are analyzed. The protection of the submarine cable is mastered, and the protective measures are taken in time for the weak link to achieve safety and stability of the submarine cable. The purpose of the operation. Based on the results of the 2015 and 2017 submarine cable route topography test, this paper analyzes the sand wave stability of the routing area and grasps the trend of sand dune change, thus developing the cable protection measures.