固化土在海上风电基础冲刷防护工程中的应用

Application of solidified soil in scour protection of foundations in offshore windpower engineering

局部冲刷是海上风电工程中常见的现象。目前,工程中对于海上风电基础冲刷防护仍以抛石措施为主,然而该措施存在防护效果差、后期维护费用高的缺点。结合如东海上风电工程,对固化土加固海上风电桩基础冲刷坑的抗冲刷过程进行了分析。根据扫测结果对桩基础冲刷坑形态进行总结分类,并针对性地提出了四种防护方案,进而对固化土施工方案和施工工艺进行了总结。采用多波束对固化土防护效果进行了检测,扫测结果显示固化土防护后的桩基础周围基本保持平整状态,未见明显的冲刷现象,说明固化土防护层能够抵抗高速水流的冲刷,可作为传统抛石措施的替代方案。研究可为海上风电基础冲刷防护工程提供参考。

Local scour is a common phenomenon in offshore wind power projects.At present,the riprap is still the main measure for offshore wind power foundation erosion protection in the engineering practice.However,this countermeasure has the shortcoming of poor protection effect and high maintenance cost in the later period.Combined with the wind power project in the East China Sea,the anti-scour process of the scour pit of offshore wind power pile foundation reinforced by solidified soil was analyzed.According to the results of the scanning survey,the shape of the pile foundation scour hole was summarized and classified,and four protection schemes were put forward.Then the construction scheme and technology of the solidified soil were summarized.The protective effect of solidified soil was tested by using multibeam method.The scanning test results show that the surrounding area of the pile foundation after the solidified soil protection is basically flat,and no obvious scouring phenomenon is found.This indicates that the solidified soil protective layer can resist the scouring of high-speed water flow,and can be used as an alternative measure to the traditional riprap.The conclusions provide a reference for erosion protection project of offshore wind power foundation.