The blasting method for notch of the earth-rock cofferdam antiseepage wall at the second stage of chinese Three Gorges Project, the measurement results of water hammer wave are presented, the influential factors of affecting the intensity of water hammer wave are analyzed, the control opf explosive dose of notch and protection method are put forward.

Dabu power-plant had been successful in applying anti-leakage new technology of high pressure spraying guniting for earth-rock cofferdam on the blanket of gravels, which shortened construction period with good anti-leakage effect and obvious economic benefit.

Anti-seepage technique for construction of upstream earth-rockfill cofferdams of Goupitan Hydropower Plant;

Application of controlled grouting to anti-seepage of earth-rockfill cofferdam;

Anti-seepage construction of earth-rockfill cofferdam for Yinpan Hydropower Station

Application of controlled curtain grouting impervious technology in embankment cofferdams;

The impervious technique of high-pressure gunite applied to stage Ⅰembankment cofferdam of the Three Gorges Project was introduced comprehensively.

Taking one work as example and according to its features the foundation treatment techniques are introduced from earth cofferdam, heavy curtain piles, dewatering, drainage and other aspects, which provides good references for similar works.

This paper introduces the joint application of high-pressure jet grouted piles and cement soil mixed piled for dealing with seepage of earth cofferdam for dry dock in Rizhao Port.

The procedure of construction with earth-bag cofferdam is introduced for the open-cut foundation in deep water and sandy soil with a narrow space at Pier No.