Study On Seepage Property And Methods For Control Of Seepage In High RCC Gravity Dams

Aiming at the main problem of seepage in high RCCD, the author has made a particular analysis and research in the basis of the FEM theory with a project practice and literatures research. Main works are as follows:1. The analysis of theory and characteristics on RCCD. From the basic concept about the seepage to the basic seepage theory about high RCCD, the author expounds the seepage characteristics of high RCCD which brings forward keystone and difficulty for practical projects. After that, Study on the FEM theory cited by the analysis of the seepage. Mainly expatiate on the drainage substructure for simulating drainage holes, and plane element model for the RCC intervals. At the same time the author expounds the method for accounting seepage flow accurately and quantitatively.2. Study and compared the impervious and drainage structure of normal RCCD with that of high RCCD. The detailed analysis of the cause of cracks on upstream face of high RCCD and the seepage behavior of the cracks is work out in this paper. Subsequently, a suggestion of a simple and effective seepage-control measure in cracks on upstream face of high RCCD are presented.3. The analysis of Guang-zhao high RCCD seepage field. Applying the former theory on the Guang-zhao high RCCD, the author has analyzed its seepage characteristics and the effect of its seepage-control measures. The author also applied the simple and effective seepage-control measures in cracks on upstream face to Guang-zhao high RCCD to confirm its effect. At last the author has given some constructive suggestions and conclusions.