钱塘江河口尖山河段的围涂治理  

Reclamation Improvement for Jianshan River Reach in Qiantang Estuary

作　　者：李来武[1] 杨火其[1] 王文杰[1] 鲁海燕[1] 

机构地区：[1]浙江省水利河口研究院,杭州310020

出　　处：《科技通报》2015年第7期73-77,共5页Bulletin of Science and Technology

基　　金：浙江省自然基金(LY13E090001);浙江省科技计划项目(2015F50064)

摘　　要：对钱塘江河口尖山河段河道主槽不稳,摆动频繁的原因进行了分析。针对该河段地形地貌、水动力条件和泥沙特性,采取了抛筑长丁坝结合围涂进行河道治理的方法。通过余姚岸段抛筑方案的比选研究,分析了抛筑长丁坝对钱塘江涌潮的影响,抛筑顺序对促淤效果的影响。采用水槽试验手段,确定了砂肋软体排护底施工所需要的最小船抛压载厚度。工程实施后,贴岸南股深槽推移到了主槽区,岸线前沿高程普遍抬高,形成了沿岸滩涂,提高了堤防的安全度。The reason for main channel instability and frequent shift of Jianshan river reach in Qiantang Estuary was analyzed. According to topography and geomorphology, hydrodynamic condition and sediment characteristics, the riprapped long spur combined with reclamation were utilized for channel improvement. Through the comparison of riprap schemes in Yuyao river reach, the effect of riprapped long spur on Qiantang tidal bore and the riprap procedure on promoting deposition were investigated. Flume experiment determined the minimum ship-riprapped ballast thickness in sand-rib geomattress bottom protection construction. As a result of the project, the inshore south tide deep groove moved to the main channel region, and the height of frontage for coastline generally increased. The tidal flat was formed,and the embankment safety was improved.

关 键 词：钱塘江 抛坝促淤 围涂治理 

分 类 号：TV8[水利工程—水利水电工程]