Research and application of low-disturbance cutter suction dredging technology based on refined hydrological forecasting
Due to the significant environmental impact of traditional cutter suction dredger technology,there are numerous restrictions when conducting dredging operations in environmentally protected areas.Based on the field engineering of the Maowei Sea area in the Pinglu Canal,through hydrological forecasting,numerical simulations of cutter disturbances and on-site demonstration applications,we conducted research on low-disturbance dredging technology for cutter suction dredgers.In this study,the tidal flow calculation results from hydrological forecasting were used as boundary conditions for the numerical simulation of cutter disturbances,establishing a mathematical model of cutter disturbances under construction parameters,subsequently,on-site demonstration applications would be carried out.The results indicate that as the cutter rotation speed and swing speed increase,the maximum sediment diffusion range and the increment of suspended solids also increase.Without significantly affecting construction efficiency,selecting a cutter rotation speed of 24-26 r/min and a swing speed of 9-10 m/min for the dredging project in the Maowei Sea area can control the maximum sediment diffusion range within 100 m,with the maximum increment of suspended solids at 50 m not exceeding 50 mg/L,this effectively reduces the disturbance to the surrounding water body during construction.
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