The structural type and construction methods of gravel cofferdam are introduced;and the type and forms of double fabric bags used as anti-seepage measures are also illustrated as well.

Construction Technology & characteristics for large sand cofferdam;

In recent years, the hydraulic engineering in Zhujiang delta especially in Shunde, a great amount of successful experiences have been obtained in the adoptation of sand cofferdams.

This paper has a detailed description on construction and final results of sand bag cofferdam.

Based on the computational FEM model of cofferdam system with steel sheet piles,numerical analyses with both response spectrum and step-by-step integration methods are conducted by using Lanczos eigenvalue extraction technique to obtain natural frequencies and modes.