基于声呐图像的海上风电桩基局部冲刷实时监测研究

Research of Real-time Monitoring for Local Scour of Offshore Wind Power Pile Foundation Based on Sonar Image

在江苏大丰某海上风电场选取代表机位,安装桩基局部冲刷实时监测系统对桩基周围海床进行实时监测,并和多波束水下地形测量成果进行对比分析。结果表明:该系统实时监测效果较好,与多波束的测量结果相吻合,其最大优势在于能长期实时连续监测桩基周围海床的高程变化情况,掌握长期冲淤趋势。监测桩基海床已产生最大冲刷深度达8 m的冲刷坑,为保障风机系统的安全稳定,建议及时采取冲刷防护措施,以防冲刷坑进一步发育。

A representative stand was selected in an offshore wind farm in Dafeng,Jiangsu Province,and a real-time monitoring system for local scour of pile foundation was installed to monitor the seabed around the pile foundation in real time,which was compared with the results of multi beam underwater topographic survey.The results show that the real-time monitoring effect of the system is good,which is consistent with the multi beam measurement results.Its greatest advantage is that it can continuously monitor the elevation change of the seabed around the pile foundation in a long-term real-time manner,and grasp the long-term erosion and deposition trend.Scour pits with a maximum scour depth of 8 m have been generated on the seabed around the pile foundation.In order to ensure the safety and stability of the fan system,it is recommended to take scour protection measures in time to prevent further development of scour pits.