PERMEABILITY OF RELAXED ROCKMASS IN DALIUSHU DAM SITE
Chen Wenwu1，Sun Guanping1，Song Chang2，Li Xuefeng1
(1Resource and Environment College，Lanzhou University， Lanzhou 730000 China) (2Department of Civil Engineering，Tianjin Institute of Urban Construction， Tianjin 300381 China)
Abstract：According to abundant prospecting data of irrigation works and hydropower stations and various reports of monographic study，it has been testified that there is relaxed rockmass over an extensive area at Dalushu dam site. It results in an essential leap in cognition process concerning complicated geological engineering conditions on Daliushu dam site. Both open structural surface and intensive permeability are the hydrogeological features of relaxed rockmass. Study is made on the treatment of permeable rockmass，excavation of high slopes，seepage loss and permeation stability of rockmass. The study results show that the project in such condition is of the features，such as higher difficulty of technology，huger investment，difficulty to safeguard，higher risk of policy making.
2003, Vol. 22 
