A Reservoir Rockfill Dam Prototype Observation Data Analysis And Safety Evaluation

As most commonly used rock-fill dam, the concrete face rock-fill dam(CFRD)is quickly developing. CFRD takes rockfill as the supporting structure, and takes the concrete face established in its upstream surface as anti-seepage structure. Compared with the traditional earth dam, with less investment, safe and reliable, convenient and short time construction, strong compatibility etc. Introducing and learning foreign advanced technology, combined with our own physical circum -stances, the design and construction of CFRD in our country has achieved a certain level.Bacause of its own complicated construction and disperse material,there are still some unsolved questions about the design of CFRD, and we have no choice but to rely on practical experience. This paper combined observation data analysis with nonliner finite element caculation to study FengPing CFRD and analyse distortion and stress condition of dam rockfill and face. Has done the following work:(1)Analyzed the factor of CFRD distortion, elaborated the face and rockfill distortion characteristic comprehensively;(2)Comparing and analyzing several filled rock commonly used stress-strain relationship models, using Duncan-Chang hyperbolic E-B model to comculate;(3)Using the comparative method, the mapping method, the characteristic value and many other methods, carried on the reorganization and analysis of the dam data, drew various physical quantities lasted process line and the distribution curve etc, finally appraised the dam actual running status;(4)Compared the actual analysis result with other similar projects, given dam safty evaluation referanced related standards, conclution has gained:the dam is in normal state in storange time, also recording to FengPing CFRD, put forward the observation suggestion;(5)Studyed the construction and storage process through finite element simulation, analyzed the distortion situation and stress condition of the dam in different process, made comparation with the actual analysis result, showed that the two are in accordance.