天津市海堤工程典型断面波浪模型试验  

Wave model test for typical section of Tianjin City seawall project

作　　者：丰淑云 吴亚斌 FENG Shuyun;WU Yabin(Tianjin Coastal Embankment Management Center,Tianjin 300131;Tianjin Yongding River Management Center,Tianjin 300131)

机构地区：[1]天津市海堤管理中心,天津300131 [2]天津市永定河管理中心,天津300131

出　　处：《中国防汛抗旱》2023年第5期80-85,共6页China Flood & Drought Management

摘　　要：针对天津市海堤典型断面,对目前海堤结构的稳定性、越浪量、挡浪墙受力等进行了波浪水槽物理模型试验。对海堤在风暴潮和波浪作用下的稳定性进行了验证,并对堤顶越浪及挡浪墙受力进行了测量。结果表明:现状海堤历经约20年波浪侵袭和多次风暴潮灾害,堤身材料老化,防护效果下降,达不到原有设计标准;在设计水位和极端高水位情况下,海堤护坡出现较为严重的破坏、整体结构受到巨大破坏甚至整体失稳;极端高水位时,挡浪墙最大水平力为52.74 kN/m、底部最大浮托力为17.83 kN/m,挡浪墙未出现可观测滑移或倾斜、主体结构稳定;极端高水位时,越浪量达到65.6 L/(m·s)、对应水舌厚度为0.91 m、越浪漫滩距离为14.36 m,试验中还出现了部分波浪直接越过挡浪墙的情况,此时越浪量、水舌厚度、越浪漫滩距离均大幅度增加。研究成果将为后续堤防加固升级提供科学依据。In view of the typical section of Tianjin seawall,the physical model test of wave flume was carried out on the stability of the current seawall structure,the overtopping amount and the force of the wave retaining wall.The stability of the seawall under the action of storm surge and wave was verified,and the overtopping of the seawall and the force of the wave retaining wall were measured.The results show that:The current seawall has been destroyed by multiple waves and storm surges for about 20 years,resulting in aging of the material of the seawall and a decrease in the protection effect,which cannot meet the original design standards.Under design and extreme high water levels,the slope protection of the seawall has been severely damaged,and the overall structure has been greatly damaged or even overall instability.Under extreme water level,the maximum horizontal force of the retaining wall is 52.74 kN/m,and the maximum floating force at the bottom is 17.83 kN/m,the retaining wall has no observable slip or tilt,and the main structure is stable.Under extreme water level,the overtopping amount reaches 65.6 L/(m·s),the corresponding water tongue thickness is 0.91 m,and the overtopping distance is 14.36 m.In the test,there are also some waves directly crossing the retaining wall,and the overtopping amount,water tongue thickness and overtopping distance are greatly increased.The research results will provide scientific basis for subsequent embankment reinforcement and upgrading.

关 键 词：海堤 波浪 稳定性 模型试验 

分 类 号：TV139.25[水利工程—水力学及河流动力学]