绞吸挖泥船施工经济性选型分析

Economy selection of cutter suction dredger construction

为合理控制投资,需根据项目施工条件合理选择疏浚船型。以绞吸挖泥船为基础,依据现行疏浚定额,分析疏浚价格组成及影响因素,通过分析不同疏浚船型在不同吹距时的价格曲线得到单价的变化趋势,找出吹距相同时的经济船型;总结得出大中型绞吸挖泥船的经济适用的疏浚工程量范围。结果表明,当吹距相同时,采用大型绞吸挖泥船成本优势明显,更适合远距离吹填;当疏浚工程量较小时,中小型绞吸船疏浚成本优势明显;当工程量大于200万m 3时,大型船舶具有成本优势;当运(吹)距超过14 km时,选用抓斗挖泥船比耙吸挖泥船经济性更优。

To reasonably control the investment,the dredging ship types should be reasonably selected according to the project construction conditions.Based on the cutter suction dredger,according to the current dredging quota,this paper analyzes the composition and influencing factors of dredging price.By analyzing the price curve of different dredging ship types at different blowing distances,the changing trend of unit price is obtained and the economic ship types with the same blowing distances are found out.The economic and applicable dredging project scope of large and medium-sized cutter suction dredgers is summarized.The results show that when the blowing distance is the same,the large cutter suction dredger has obvious cost advantage and is more suitable for long distance blowing and filling.When the amount of dredging is small,the cost advantage of small and medium-sized cutter suction dredger is obvious.When the amount of dredging is more than 2 million m 3,the cost advantage of large dredger is obvious.When the transport distance is far,it is better to choose grab dredger than rake suction dredger.