China's offshore wind power has developed rapidly,from offshore to deep sea,with single unit capacity increasing from 5 MW to 12 MW.Offshore wind power is developing to large-scale,and the scouring depth becomes larger after the increase of single pile diameter.Selecting a suitable anti-erosion scheme plays a key role in the long-term safe operation of wind farms.In this paper,the erosion of large diameter single piles in Xuwen Zengrong Wind Power Project was studied,the water depth around single pile was measured by multi-frequency scanning,and the rule of single pile erosion was mastered.Single pile scouring progressed rapidly in the early stage,and the scouring pit reached its maximum within 45 days of scouring,after which the scouring pit was in a dynamic equilibrium state.The geological scouring pit in Xuwen Sea area was suitable for the scouring depth calculated by the Richardson formula.The calculated value of 0.75 times was relatively close to the actual scouring depth,and the maximum depth of the scouring pit was 0.75-0.85 times of the pile diameter.The scouring radius is 5-6 times the scouring depth.The anti-erosion effect of geotextile netted stone is obvious,and the daily erosion volume is 1.6％of the non-protective condition and 38.9％of the ordinary netted stone.Geotextile netted stone can achieve good anti-erosion effect under the premise of better cost saving.This method is worth popularizing and can provide reference for similar projects in the future.
offshore wind powerlarge diameter single pilescouringgeotextile netriprap
维普
万方数据
