绞吸挖泥船吹填管线泥沙分离施工工艺

肯尼亚拉姆港疏浚及吹填项目中吹填区须进行临时围埝施工。由于当地石料价格较高,陆地砂源少,因此只能通过大型绞吸挖泥船采用水下取砂的方式进行备砂。而施工区土质为黏土混砂,且含有大量贝壳,砂层较薄,取砂效率极低。为此,研制一种管线用滤砂装置,该装置可将砂与其他废土分离,并分别吹填至不同区域。该大型绞吸挖泥船黏土与砂混挖分离施工技术,解决了砂与黏土球及贝壳分离的难题,保证了砂袋充填砂的质量,提高了充填砂袋施工效率,大大降低了施工成本。

Construction technology of silt-sand separation for sand preparation by cutter suction dredger

In the dredging and reclamation project of the Ram Port in Kenya,temporary dredging construction is required in the landfill area. The local stone material is expensive and it is a lack of sand source.Therefore,sand can only be prepared through underwater sand-taking by the large-scale cutter suction dredger.But soil in the construction area is clay mixed with sand and contains a large number of shells.Moreover,the sand layer is thin,so the sand-taking efficiency is extremely low. So,we develop a sand filter device for pipelines,which can separate sand from other waste soils and separately fill them into different areas. By the clay-sand mixture separation technology by the large-scale cutter suction dredger,we solve the problem of separating the sand from the clay ball and the shell and ensure the quality of the bag-filling sand,improve the construction efficiency of the sand bag-filing efficiency and greatly reduce the construction cost.