Study on Scour Test of Jacket Foundation for Offshore Substation

Key words: 
• sandy seabed /
• jacketfoundation /
• local scour /
• model test

Abstract: [Introduction] The important part for offshore wind power development is the construction of a suitable offshore booster substation.In recent years, the main form of the foundation for offshore wind station is jacket structure. [Method] In this paper, the physical model tests were carried out to study the local scour of the base wave flow for the jacket foundationwith different scale in combination with a wind farm project to be built on the sandy coast.On this basis, the influence of wave and water flow on local scour depth were analyzed, and the scope and depth of local scour of pile foundation under the combined action of wave flow were studied. Finally, the protective effect of sand cover and sandbag was studied. [Result] The results show that the most depth of scouring for the jacket foundation of the booster station is at the water face of the foundation, and the maximum depth is 1.75 times of the diameter of the pile foundation. [Conclusion] The research methods and related conclusions in this paper can provide references for similar engineering scour test and engineering design.