长江口水下拋石施工技术及全过程控制

Construction Technology and Whole Process Control of Underwater Riprap Construction in Yangtze Estuary

现在的长江口是三级分汊四口入海即由崇明岛分为南支和北支,南支由长兴岛和横沙分为南港和北港,南港再由九段沙分为南槽和北槽。长兴岛经人工围垦、堵汊,合并若干小沙岛而成,为防止长江水流对现有长兴岛成陆区域造成影响,同时考虑防汛要求,实施了长兴北沿新圈围工程海塘达标及保滩工程。本文通过以长兴北沿新圈围工程海塘达标及保滩工程为例,介绍水下抛石施工工序、施工技术及全过程控制措施,为其他类似工程实施提供参考。

The Yangtze River estuary is now divided into three branches in four ports, which are the South Branch and the North Branch in Chongming Island, the South Branch of Changxing Island and cross sand into the south port and the north port, and the southern port by nine sections of sand into the South trough and the North trough. In order to prevent the influence of the Yangtze River water flow on the existing land forming area in Changxing Island, Changxing Island has been reclaimed by artificial reclamation, branching and in consideration of the requirements of flood prevention, the project of reaching the standard of the sea pond in the new circumference of the north of Changxin and the beach protection project have been carried out Through the construction technology of underwater riprap and the successful case of full process control, this paper provides references for other similar projects from the aspects of construction process, construction technology and whole process control measures.