多波束测深系统在海上风电桩基侵蚀监测中的应用

Application of Multi-Beam Sounding System in the Monitoring of Pile Foundation Erosion of Offshore Wind Turbines

[目的]研究海上风电场风电机组水下基础部分受潮流及波浪影响对其周边海底地形发生的影响。[方法]通过两次海底地形调查,对海底地形变化进行比较。[结果]研究表明:海上风电机组水下基础的冲刷主要发生在当地潮流方向上,建设初期会形成较深的冲刷坑,2年后出现冲刷槽,形成冲刷槽后桩基础周边会出现小幅度淤积。[结论]长期进行海洋风电机组基础侵蚀监测,有助于了解侵蚀范围、深度的变化,进行水文调查将有助于建立海洋水动力模型,进而对风电机组基础侵蚀进行预测。应进行抛石、固化土等措施进行侵蚀填充,延缓侵蚀发生。

[Introduction]The purpose is to study the influence of tidal current and wave on the sub-aqueous foundation of wind turbine in offshore wind farm.[Method]Through two seabed topography surveys,the changes of seabed topography were compared.[Result]The study shows that the erosion of the foundation of offshore wind turbines mainly occur in the direction of local tides.In the early stage of construction,a deep scour pit will be formed,and scour troughs will appear after two years,and siltation will appear around the foundation after the scour troughs are formed.[Conclusion]Long-term monitoring of the foundation erosion of offshore wind turbines is helpful to understand the changes in the extent and depth of erosion.Hydrological surveys will help to establish ocean hydrodynamic models to predict the foundation erosion of wind turbines.Measures such as rock dumping and solidified soil should be carried out for erosion filling to delay the occurrence of erosion.