摘要
侵蚀岸段通常是海堤破损最为频繁、严重的区段,随着极端气候条件增多及人类活动的影响,海岸侵蚀问题加剧,对海堤及后方陆域安全造成较大威胁,现有修复手段大多无法从根本上解决侵蚀型海堤的破坏问题。结合因岸滩侵蚀引起的滨海县振东闸以北段海堤破坏案例,通过现场调研、波浪物理模型试验、理论计算等手段,分析岸滩侵蚀对海堤安全影响的机理,探讨侵蚀岸段海堤修复措施,提出管桩顺坝透射系数、海堤稳定性计算方法。研究认为侵蚀岸段海堤破坏的主要原因是水深增大引起的波浪动力增强,导致在日常条件下护底、护面侵蚀及极端条件下结构失稳。据此提出保滩、加固相结合的侵蚀型岸段海堤修复方案。经波浪物理试验验证,该方案合理、可行。
Eroded shores are usually the most frequently damaged and severe sections of seawalls.With the increase of extreme weather conditions and the impact of human activities,the problem of coastal erosion has intensified,posing a greater threat to the safety of seawalls and the rear land area.Most of the repairing methods are unable to fundamentally solve the problem of the destruction of eroded seawalls.Based on the case of seawall damage to the north of Zhendong sluice in Binhai County caused by coastal erosion,we analyze the mechanism of coast erosion on the safety of the seawall,discuss the repair measures on the eroded coast,and propose the calculation method of the pile-dam transmission coefficient and the stability of the seawall through field investigation,wave physical model tests,and theoretical calculations.The research reveals that the main reason for the destruction of seawalls on eroded banks is the increase of wave dynamics caused by the increase of water depth,which leads to bottom and surface protection erosion under daily conditions and structural instability under extreme conditions.Based on this,a seawall repair plan for eroded shores with beach protection and reinforcement is proposed,which is verified by the wave physical test to be reasonable and feasible.
作者
赵一晗
黄哲
王登婷
ZHAO Yi-han;HUANG Zhe;WANG Deng-ting(Jiangsu Provincial Department of Water Resources,Nanjing 210029,China;Nanjing Hydraulic Research Institute,Nanjing 210024,China;State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering,Nanjing 210098,China)
出处
《水运工程》
北大核心
2022年第7期23-28,125,共7页
Port & Waterway Engineering
基金
江苏省沿海重点岸段冲淤演变监测评估工作项目(GHB-ZBWJ-2021004)
江苏省水利科技项目(2019009)。
关键词
侵蚀
海堤
破坏机理
修复
erosion
seawall
destruction mechanism
repair
