钱塘江鱼鳞石塘涌潮作用力动态测试与分析

Dynamic measurement and analysis of bore pressure on the ancient seawall in Qiantang River

动态测试了钱塘江北岸海宁段鱼鳞石塘在涌潮作用过程中受到的作用力,初步探索了涌潮与鱼鳞石塘相互作用的特性,得到了鱼鳞石塘迎潮面条石所受作用力随时间和空间的分布特征.在分析涌潮入射方向和潮头高度影响涌潮压力的同时,还观测并初步分析了台风与大潮共同作用时的涌潮压力.分析表明,涌潮冲击对鱼鳞石塘迎潮面结构物具有一定破坏作用.此次分析研究结果可为保护设计钱塘江临江一线古海塘提供可靠的参考依据.

In order to conduct a preliminary exploration of the interaction characteristics of the tidal bore acting on the ancient seawall, the tidal bore pressure on the ancient seawall is observed on the north bank of Haining reach of the Qiantang River. The upper structure of the ancient seawall was built with big strip stones. The time and space distribution characteristics of the tidal bore forces on these stones are analyzed in this paper, considering the effects of the bore height and the incidence directions. The combined action of the typhoon with tide bore is preliminarily analyzed by use of dynamic measurements. This analysis results can provide a reliable reference basis for the protection and design of the ancient seawall in the Qiangtang River.