From the blasting demolition of general thin wall reinforced concrete pools, the shortages of water pressure blasting and drilling and blasting methods are pointed out, and a new blasting method more suitable for demolition of thin wall pools, namely, water and soil confining pressure blasting is proposed.

The application of digital detonators energy control system on demolition blasting of TGP′s Ⅲ-phase upstream RCC cofferdam was introduced in this present paper.

The scale,total charge,technique and operated difficulty of the demolition of the third-stage upstream RCC cofferdam all exceed those of the implemented cofferdam demolition at home and abroad.

After the removal of crest portion of the downstream RCC cofferdam of the Goupitan hydroelectric project,it will serve as a "silver wrapped in gold " permanent submerged dyke.

Considering the influence of groundwater flow on the supporting structure, the change of water and earth pressures are analyzed under stable seepage around a foundation pit.

Discussion on calculation of earth and water pressure in clay;

Much study concentrates on the earth pressure and the earth and water pressure acting on retaining wall, while litter study on failure mechanism of soil behind retaining wall.

New method for calculation of water-earth pressure on foundation pit considering ground water seepage;

The calculation of lateral water-earth pressures of the foundation pit under steady seepage;

A new calculation chart of water-earth pressure on foundation pit considering groundwater seepage;