钱塘江河口九溪岸段涌潮越堤影响试验研究  

Experimental study on the impact of tidal overtopping in Jiuxi section of the Qiantang estuary

作　　者：杨火其[1] 徐新 何昆 林一楠[1] YANG Huo-qi;XU Xin;HE Kun;LIN Yi-nan(Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, China;Hangzhou Nanpai Project Construction Management Service Center, Hangzhou 310020, China)

机构地区：[1]浙江省水利河口研究院,杭州310020 [2]杭州市南排工程建设管理服务中心,杭州310020

出　　处：《水道港口》2021年第5期603-608,共6页Journal of Waterway and Harbor

基　　金：国家自然科学基金项目(41876095)。

摘　　要：采用物理模型试验研究影响钱塘江河口九溪岸段涌潮越堤导致涌潮灾害的原因以及涉水建筑物对涌潮越堤的影响。现场和试验过程观测到,当涌潮行进至九溪岸段时,受珊瑚沙新闸闸下喇叭口外形的收缩,涌潮在向珊瑚沙新闸推进过程中,涌潮强度逐渐增强,当涌潮潮头碰撞珊瑚沙新闸引起反射壅高形成的回头潮翻越之江路防洪堤是形成九溪岸段涌潮灾害的主要因素。采用加高之江路防洪堤1.0 m能降低涌潮越堤水量的同时堤前水位壅高有所增加,250 m长顺坝能通过对涌潮的阻挡、导向、挑流作用比加高防洪堤1.0 m方案降低越堤水量和减小堤前壅高更显著。A physical model test was used to study the causes of tidal bore disasters and the effects of aquatic building on tidal bore overtopping in Jiuxi section of the Qiantang River Estuary.It was observed that the intensity of tidal bore increased gradually when the tidal bore moved to the Jiuxi bank due to the contraction of the bell shape under the new Shanhusha gate.The main factor causing the tidal bore disaster in the Jiuxi bank is the backwater overturning of the river embankment caused by the high reflection caused by the collision of the tidal bore head with the Shanhusha gate.By heightening flood embankment of Zhijiang Road by 1 meter,the water volume across the embankment can be reduced,and the backwater level in front of the embankment will increase.The 250 m longitudinal dyke has the effect of blocking,guiding and diverting the surge tides,and the reduction of the water volume across the embankment and the backwater height in front of the embankment is more significant than simply heightening the flood embankment by 1 meter.

关 键 词：钱塘江河口 涌潮 壅高 越堤 涌潮灾害 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV143[交通运输工程—船舶与海洋工程]