加装砂斗装置绞吸船吹填砂质土施工技术

为适应香港某吹填工程严格的环保要求,创新改造普通绞吸船,并提出一种加装砂斗装置的绞吸船吹填施工工艺。针对改造后船舶施工效率较低、吹填砂易外漏、砂斗易堵口等问题,基于型号公称产量2000~3000 m³/h的加装砂斗装置绞吸船,采用试验类比和现场数据采集论证的方法,提出效率控制要点、环境保护措施以及格栅改造思路,同时分析得出船舶施工不同砂质情况下的最优工况。结果表明:施工机制砂平均效率可达800 m³/h以上、施工海砂平均效率可达1500 m³/h以上,同时降本环保。

Construction technology of filling sandy soil by cutter suction dredger with sand bucket device

To meet the strict environmental requirements of a reclamation project in Hongkong,we transformed the common cutter suction dredger and put forward a construction technology of filling sandy soil by cutter suction dredger with sand bucket device.Given the problems such as low construction efficiency,sand filling leakage and sand bucket plugging,and based on cutter suction dredger with sand bucket device with nominal capacity 2,000~3,000 m³/h,we have adopted the methods of experiment analogy and field data collection and demonstration,and have put forward key points of efficiency control,environmental protection measures and the idea of grid reconstruction.We have figured out the optimal working conditions of the dredger under different sand conditions.The results show that the average efficiency of mechanical sand can reach more than 800 m³/h,and the average efficiency of sea sand can reach more than 1,500 m³/h.At the same time,the cost is reduced and the environment is protected.