小尺度吹填区泥沙分选特性量化研究  

Quantification of sediment sorting characteristics in small-scale hydraulic reclamation areas

作　　者：赵健 麦研 付亚磊 罗小峰[2] 刘星璐 ZHAO Jian;MAI Yan;FU Ya-lei;LUO Xiao-feng;LIU Xing-lu(The Eighth Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,Huizhou,Guangdong 561200,China;The National Key Laboratory of Water Disaster Prevention,Nanjing Hydraulic Research Institute,Nanjing,Jiangsu 210029,China)

机构地区：[1]中交四航局第八工程有限公司,广东惠州561200 [2]南京水利科学研究院水灾害防御全国重点实验室,江苏南京210029

出　　处：《中国港湾建设》2024年第12期67-74,共8页China Harbour Engineering

基　　金：水利部重大科技项目(SKS-2022087)。

摘　　要：吹填法是填海造陆工程中的常见施工方法,但存在泥沙分选不均匀的局限性。基于中海壳牌惠州乙烯三期填海造地工程,通过4次实地勘测与采样对小尺度吹填区的泥沙分选特性进行了量化研究,并及时采取措施确保泥沙分选的均匀性。研究显示,粒组相对含量与距吹填口距离呈正相关,而偏离系数、中值粒径和不均匀系数则与之呈负相关。小尺度吹填区内的分选系数沿程分布呈单调增的幂函数,偏离系数先增大后减小并趋于定值。通过提高吹填流量和表层土搅动的措施,各泥沙分选特性与距吹填口距离的相关性降低至约0.3,表明均匀性保障措施效果显著,研究结果可为类似小尺度吹填工程的泥沙分选均匀性保障提供指导。The hydraulic reclamation method is a commonly used construction technique in land reclamation projects.However,it is limited by uneven sediment separation.Based on the CNOOC Shell Huizhou Ethylene Phase III Land Reclamation Project,a quantitative research on sediment sorting characteristics in small-scale hydraulic reclamation areas was conducted through four field surveys and sampling.Timely measures were also implemented to ensure uniformity in sediment sorting.The results show a positive correlation between the relative content of particle groups and the distance from the discharge port,while the deviation coefficient,median particle size,and uniformity coefficient exhibit negative correlations with the same distance.In the small-scale hydraulic reclamation area,the sorting coefficient follows a monotonically increasing power function along the distance,whereas the deviation coefficient initially increases,then decreases,ultimately stabilizing.Measures such as increasing the hydraulic reclamation flow rate and agitating the surface soil effectively reduced the correlation of various sediment sorting characteristics with the distance from the discharge port to approximately 0.3,which indicates that the uniformity guarantee measures are effective.The results can provide valuable guidance for ensuring sediment sorting uniformity in similar small-scale hydraulic reclamation projects.

关 键 词：吹填法 小尺度吹填区 泥沙分选特性量化 均匀性保障 

分 类 号：U655.4[交通运输工程—港口、海岸及近海工程]