Effects of Quality Defects in Anti-seepage Wall on Seepage Control of the Earth-rock Dam

In this paper,the seepage finite element method is used to investigate the effects of quality defects in the concrete anti-seepage wall on the seepage control of the dam in the Wujiayuan Reservoir.The quality defects include the cracks in the concrete anti-seepage wall,increasing of the permeability coefficient,and suspension of the anti-seepage wall.The results show that if the anti-seepage wall is in good condition,then the seepage control can satisfy the safety requirements of the engineering project;however,if there are defects in the anti-seepage wall,they can have significant effects on the seepage gradient in different parts of the dam.In particular,the location of the crack in the anti-seepage wall has higher effects than the size of the crack on the seepage control,and the anti-seepage wall suspension has higher effects than the increasing of the permeability coefficient on the seepage control.