不同材质吹填管线中粗砂输送摩阻特性

Characteristics of frictional resistance of different material dredge pipeline in medium-coarse sand transportation

以厦门新机场大小嶝造地工程作为典型工程,开展不同材质吹填管线中粗砂输送摩阻特性的现场监测研究。在绞吸挖泥船吹填管线中串联钢基聚氨酯内衬管、Q235钢制管和铠装管,进行清水和中粗砂输送条件下的沿程压力监测。根据该测试结果,对比分析输送清水和中粗砂介质条件下,不同材质吹填管线的摩阻特性;并根据不同材质吹填管线的水力坡度,对比绞吸船给定排压条件下不同材质吹填管线中粗砂的排距。结果表明:打清水和输送中粗砂时,铠装管的水力坡度最大,Q235钢制管次之,钢基聚氨酯内衬管最小;中粗砂输送条件下,钢基聚氨酯内衬管线的水力坡度比Q235钢制管降低约10%。

We mainly researched the friction characteristics of different material dredge pipeline in medium-coarse sand transportation in Xiamen New Airport Dadeng and Xiaodeng land reclamation construction.We carried out the following pressure monitoring under the conditions of water and slurry transportation in the chosen cutter-suction dredger pipeline,among which the polyurethane pipeline,Q235steal pipeline,and armored pipeline were in series connection.The results,compared with the frictional characteristics of different material dredge pipeline in water and medium-coarse sand transportation.According to the hydraulic gradient of different material pipelines,we compared the row distance of coarse sand in different material pipelines under the condition of the given pressure of suction dredger.The results show that when making water and transporting coarse sand,the hydraulic gradient of armored pipeline is the biggest,the Q235steal pipeline is the second most,and the polyurethane pipeline is the smallest;the hydraulic gradient of the polyurethane pipeline is about10%lower than the Q235steal pipeline under the condition of medium-coarse sand transportation.