大型耙吸挖泥船外海取砂装舱施工工艺优化

针对厦门机场二期工程大型耙吸挖泥船外海取砂工效提升的目标，通过分析不同采砂区装舱溢流土质特性和现有取砂工艺问题，总结导致不同采砂区取砂装舱施工效率降低的主要原因，提出针对不同土质特性的外海取砂装舱施工优化工艺，并经实船测试和应用。结果表明，不同土质的取砂装舱工艺存在差异，对于易沉积、溢流损失小的土质条件，提升舱内平整度能够有效增加装舱土方量；对于难沉积、溢流损失大的土质条件，提升挖泥能力是提高取砂装舱效率的重要手段。

Technology optimization for sand extraction and loading construction in open sea by large trailing suction hopper dredger

In order to improve the efficiency of sand extraction in the open sea by large trailing suction hopper dredger in Xiamen Airport phase II project，we analyze soil characteristics of loading and overflow in different sand extraction areas and existing loading construction problems，and summarize main reasons for the reduction of construction efficiency in different sand extraction areas.Then we propose the optimization technology of sand extraction and loading construction in open sea according to different soil characteristics，which is verified and applied by the on-board test.The results show that there are differences in the sand extraction and loading technology of different soils.For the soil condition with easy deposition and small overflow loss，improving the flatness of cabin can effectively increase the loading soil volume.For the soil condition with difficult deposition and large overflow loss，promoting the ability of excavation is an important mean to improve the efficiency of sand extraction and loading.