Physical modeling researches on the improvement project of the deep-draft channel of the Yangtze estuary

摘要

Since the commencement the improvement of the deep-draft channel of the Yangtze Estuary, whole physical model, local physical model and series undistorted model are used to study the order of constructing, local scour in the vicinity of structures and project scheme adjustment, etc. The outline tests on the alignment of spur dikes in the flume with repeated tidal flow were carried out based on the alignment of the regulation structures in the north passage of the deep waterway in the Yangtze Estuary. The whole physical model and outline model are introduced in this paper. Most research achievements were adopted in the design and construction and proved basically accurate qualitatively and relatively reasonable quantitatively, and thus were crucial for the project to achieve a good effect. Analyses of the riverbed evolution after the construction of three phase regulation works show that results accords with the natural state of the Yangtze Estuary.