Measurement Research On The Strengthening Of Cetian Resmeervoir Dam

It is very important to shore up reservoirs in poor condition in order to fully display their benefits. Because, once the poor reservoirs are reinforced, they can recover or strengthen the flood controlling capacity and promote the social benefits, improve the ecological environment, promote the development of water conservancy undertakings and bring benefits to the people. And also because they have influence on ensuring the safety of the lives and property of the people, and on accelerating economic development and social stability.The Cetinan reservoir is the controlling engineering of departure terminal of Shanxi Province for the mainstream of Sanggan Water. The construction of the reservoir started in March 1958, and it was continuing to construct from 1970 to 1976, the most height of the dam is 41.5 maters. The hub project of the reservoir is composed of big dam, normal spillway, cemented masonry gravity dam and so on, and later a spillway was constructed too. The dam consists of main dam, north and south secondary dam. The dam still has many potential problems due to so badly searched before construction that the seepage is very serious after the reservoir water storing, and because of so poor quality of filling the dam that many cracks is arising in the dam body. In order to improve the anti-flood and water storage capacity, and fully displaying the benefits, it is urgent to reinforce the dam of the reservoir.By means of analyzing the slope and infiltration stability of the dam, many measurements are put forward. The upper dam slope was excavated with the slope of 1:1.2 ratio from the axis to the height of 951 meters, it was filled with broken stones of which design dry density is 21kN/m3, the reverse filter layer was installed between the broken stones form and dam body, the revetment was filled up with broken stones, which was 40 cm in thickness, and under it the later layer was constructed with 30 cm thick broken stones. The main dam foundation was handled with plastic concrete in a vertical position, which was called as diaphragm wall with 4 meters thick and thorough into the basalt. The foundation of southern assistant dam was an ancient river channel, the bottom of which was 10 meters higher than the riverbed, the maximum thickness of the accumulation was 25 meters. According to the evaluation of << Water Conservancy and Hydroelectric Power Engineering Geological Investigation Standards>>GB50287-99 and the <>GB50011-2001, the foundation of southern assistant dam was a liquefaction layer, which could eliminated liquefaction stability for earth dam by using loading method in front of dam.Environmental protection measurements, environment management and monitoring program were posed according to its natural and social environment of the engineering and the impact of engineering construction on environment.