海上风电单桩基础冲刷固化土防护应用研究

Research on application of scour prevention technology for single pile foundation of offshore wind power

深远海海上风电项目风机基础所处海域水深较大,洋流冲刷强。海上风机单桩基础多使用砂被或抛石工艺防止海流对基础根部的冲刷侵蚀。常规砂被施工工艺防冲刷能力较弱,抛石工艺施工精度不易控制。以南海某风场为研究对象,对固化土施工方案进行了研究,探讨在深远海复杂海况下海上风电场项目单桩基础固化土防冲刷方案的可行性。结果显示,固化土材料整体均匀性较好,粘聚力指标高,抗冲刷能力强,与单桩基础贴合较好;经济上,相比砂被方案和抛石方案,固化土施工方案具有较高的经济性;防冲刷效果上,固化土方案能够实现对单桩基础的全寿命周期防护。研究成果可在深远海海上风电工程推广应用。

The water depth of the wind turbine foundation of the offshore wind power project in the deep sea is deep,and the ocean current erosion is strong.The single pile foundation of offshore wind turbine mostly used sand quilt or enrockment to prevent the erosion of the foundation root by the current.However,the scour prevention ability of conventional sand quilt construction technology was weak,and the construction precision of enrockment was not easy to control.Based on a wind field in the South China Sea,a study was conducted on the feasibility of the scour prevention of solidified soil for single pile foundation in deep sea offshore wind power project under complex sea conditions through the research of the scheme of solidified soil.The results show that the overall uniformity of the solidified soil material is good,the cohesion index is high,and the scour prevention ability is strong,which fits well with the single pile foundation.In terms of economy,the solidified soil scheme has high economy,compared to the sand quilt and enrockment.In terms of scour prevention effect,the solidified soil can realize the whole life cycle protection of single pile foundation,which can be popularized and applied in deep sea offshore wind power projects.