Optimal Design of First-phase Cofferdam Structure of Yakou Shipping Hub Project of Han River

There are some problems in the original design of the first-phase cofferdam of Yakou shipping hub project of the Han River, such as large engineering amount, short construction period, difficult material supply, low construction efficiency and unsatisfactory slope protection.According to the actual situation of the project, the earth and rock cofferdam structure with sandbag-filled berm, silty sand weir, sandbagfilled and mold bag concrete slope protection has successfully solved the problems existing in the original design, and completed the project construction in high quality within the nodal duration.