浅谈强涌潮围垦地区的抛石丁坝施工

On Jackstone Groyne Construction in Strong Tidal Bore Reclamation Region

钱塘江涌潮最强的区域,河床较低、紧临深江,需要在强涌潮顶冲地段进行深水促淤,客观上存在着抛坝难、保坝难、保障难、合龙难等诸多实际困难。萧围东线治江围涂一期工程结合围垦围海造田的施工特点,利用水动力学原理及大小潮汛的特点抛筑丁坝,采取船抛护底等工艺、工法,减少了丁坝抛筑断面方量,大大节省了施工成本。

The area of Qiantang River with the strongest tidal bore is characterized by lower riverbed , which is close to deep river.Deepwater accretion promotion is conducted in the strong tidal bore head punch section .The region objectively has many practical difficulties of dam throwing , dam protection, guarantee, convergence, etc.Construction features of reclamation sea enclosure and farmland protection are combined in Xiaowei east line river governance reclamation stage I project.The groyne is built by water dynamics principles and large-small tide flood characteristics , and processes and methods of ship-throwing bottom protection , etc.are adopted for reducing the earthwork quantity on the groyne building section and greatly saving the construction cost .