Experimental study on the concrete properties in cut-off wall of the earth-rock cofferdam;

Structure design of Donghu tunnel steel sheet pile cofferdam;

Application of geomembrane to cofferdam of Langshitan Hydropower Station;

Application of the civil structure coffer dam in construction and diversion project;

The stress state and seepage of anti-seepage walls under longitudinal RCC coffer dam of Linkuhydropower station are studied using 2D non-linear finite element method.

During the design of the Jilin Tai construction conduction and damming current,the bank slope complete rock and the coffer dam union was fully used,reduced the coffer dam seep,obtained some economic efficiency; Simultaneously used the prominent rock to make T-shaped dam,damming current difficulty was reduced.

Design & construction of steel board pile coffer of low pile platform in sandy land;

The construction technique and process of single wall steel coffer ringlike bot-tom concrete pavement under deep water,under the geological condition of shallow soil coveringlayer,are introduced,which is a good reference to other construction companies.

Study of electric energy influenced by tail race river narrowed by cofferdams;

Discusses the optimizing process of treatments of the main technical problems,which include the construction schedule, the field plan and the balance of earth and rock works, method of the river closure and cofferdams sections, procedure and time of the river colsure, form of the cutoff, construction of the cut-off wall

The cut off wall of the second stage cofferdams of the Three Gorges Project has a maximum height of 74?m, a thickness of 0 8～1 1?m,and a total seepage proof area of 83?450?m 2 .