Analysis of a Roller Compacted Concrete Dam's “Finite Seepage Control”Measure and Effect

A roller compacted concrete dam foundation rock mass has fracture structure development such as strong water permeability,high angle fault,fissures and fissures concentration areas,it also has high angle fracture,argillaceous filling in the level and low angle dip fissure surface and shallow layer has no relative water resisting layer. According to these engineering geological difficulties and combined with the reservoir operation monitoring data for a long time,it analyzed the closed seepage measures' effectiveness that using hanging curtain and dam foundation drainage combined with horizontal bedding and considered that the current seepage measures were effective,the amount of seepage was not big and the seepage effect is better. In the current situation of excessive seepage and stressing on vertical close and through this reservoir's successful instances of vertical seepage combination with horizontal bedding,it put forward the design concept of finite seepage control which could well solve the infinite(deep)permeable boundary seepage problem.