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上海市圈围造地工程的围堤一般采用护砌的斜坡式结构,用砂量大,围内吹填成陆更是需要大量砂土料,因此,如何采砂与吹填对工程建设至关重要,也直接影响工程的投资。通过近几年上海市的圈围造地工程中,几种不同的采砂与吹填施工方案,进行优缺点比较、经济性分析;提出了大中型耙吸式挖泥船和绞吸式挖泥船具有较高的施工作业效率,但其经济性、施工工效随运输距离的增长而下降;链斗式挖泥船、抓斗式挖泥船、吸砂船等挖泥船,组织灵活,施工简单,当运输距离较远时,其经济性、灵活性较好;所得出的分析成果,为类似工程设计提供参考。
The embankment of the encircling land in Shanghai surrounding the area generally adopts the slope-type structure of the retaining wall. Large amount of sand is needed and a large amount of sand and sand is needed to fill the land within the area. Therefore, Important, but also directly affect the project's investment. Through several schemes of sand mining and reclamation construction in Shanghai in recent years, the advantages and disadvantages are compared and economic analysis is made. A large and medium-sized trailing suction dredger and cutter suction dredging Muddles have high construction efficiency, but their economy and construction efficiency decline with the increase of transport distance; dredgers such as bucket dredger, grab dredger and sand suction vessel have the advantages of flexible organization, The construction is simple. When the transport distance is long, its economy and flexibility are better. The analysis results obtained provide reference for similar engineering design.