Hydro-Quebec (HQ) là một công ty điện nhà nước tích hợp xây dựng và vận hành đập, nhà máy phát điện, đường dây truyền tải và mạng lưới phân phối ở tỉnh Quebec, Canada. Tổng số cài đặt công suất đạt hơn 40 000 MW từ đó thủy điện đại diện trên 90%. Doanh số bán hàng của nó, trong nước và quốc tế (Mỹ và nước láng giềng tỉnh của Canada), theo thứ tự của 10 tỷ USD hàng năm. Trong nửa thế kỷ qua, HQ đã xây dựng gần 500 đập, đê điều trong nhiều đất đá nền tảng và trong suốt thời gian, nó. | Vietnam National Commission On Large Dams. Dam Foundation Treatments Review of Hydro Quebec Experiences Nguyen Huu Phuong 1 Head Dam Safety and Civil Works Department Hydro Quebec. Nguyen Don2 Dam Safety Specialist Introduction Hydro-Quebec HQ is an integrated state-owned electricity company which builds and operates dams generating power plants transmission lines and distribution networks in the province of Quebec Canada. Its total installed capacity reaches more than 40 000 MW from which hydro power represents over 90 . Its sales domestic and international to USA and neighbouring provinces of Canada is in the order of 10 billion annually. In the last half century HQ has built almost 500 dams and dykes in various soil and rock foundation and throughout the time it has got valuable experiences on foundation treatment either on new or on existing structures The most reputed and well-known case is the cut-off walls of Manic- 3 main dam built in 1971-72 This project is followed in the 80 s and 90 s with the development of the James Bay Complex where others modern soil foundation treatments were in application and mostly at cH-20 dam of LG-2 powerplant OA-11 dam of the EOL reservoir South dykes of the LG-3 powerplant And presently with the on-going Peribonka hydropower development in 2005 Basic Philosophy and Approach The well-known expert Pr. Harry R. Cedergren has stated out one time that engineering works involving water in our case dams and dykes can usually be made safe by Keeping the water out of the places where it can cause harm by using watertight barriers like cut-off trenches impervious membranes or blankets and grout curtains or Controlling by drainage methods by using filters and drains relief wells etc. In most cases combinations of these two fundamental methods are used successfully to control ground water seepage avoiding instability and failure by piping internal erosion etc. June 18 2005 1 of 23 Vietnam National Commission
