潮流作用下海上风电群桩基础局部冲刷与防护试验研究

海上风电基础局部冲刷会影响风电结构的稳定，对海上风电的安全运行至关重要。以四腿群桩导管架基础为研究对象，对潮流条件下基础局部冲刷开展试验研究。试验结果表明：0°水流条件下，最大冲刷深度为1.05倍桩径；45°水流条件下，最大冲刷深度为0.97倍桩径。并探索了新型蜂巢结构在群桩基础防冲刷中的应用，设计了蜂巢格室防护方案，发现在蜂巢防护情况下，两个流向作用于四腿群桩基础时最大冲刷深度仅为无防护情况下的27.3%和25.9%，表明蜂巢格室在海上风电基础的冲刷防护方面具有良好效果，在实际工程中具有较大的应用潜力。

Experimental study on local scouring and protection of offshore wind power pile groups foundation under tidal current

The scouring effect of tidal current seriously affects the structural stability of offshore wind power foundation. Scouring protection measures are very important for the safe operation of offshore wind power. Taking the four-leg pile group jacket foundation as the research object, experimental researches on the local scouring of the foundation under the condition of tidal current were carried out. The test results show that under the condition of 0° flow, the maximum scouring depth is 1.05 times of pile diameter, and under the condition of 45° flow, the maximum scouring depth is 0.97 times of pile diameter. The application of the new honeycomb structure in the scour protection of pile group foundation was explored, and the honeycomb cell protection scheme was designed. It is found that in the case of honeycomb protection, the maximum scour depth of two flow directions acting on the four-leg pile group foundation is only 27.3% and 25.9% of that in the case of no protection, indicating that the honeycomb cell has good effect in the scour protection of offshore wind power foundation and has great application potential in practical engineering.