Research On Experiment And Numerical Simulation Of Seepage Characteristic Of Crossed Karst And Cranny

Antiseepage of corroded rock mass is one of the most important problems of water-power engineering, mine engineering and traffic engineering. In this paper, combining with the key project of science and technique of Hubei Province, the seepage characteristic of crossed karst and cranny was studied deeperly, in order to let the study feature of karst leakage transform qualitative analysis to quantitative analysis, therefore the significance of which is magnitude for tackling leading edge. The main contents are as follows:(1)The develop history and research achievement of indoor experiment on rock-mass seepage was reviewed. The main numerical methods of rock-mass seepage simulation were summarized systematically and comprehensively. The advantages and disadvantages of every calculation methods were analyzed and compared, and the adaptability of these methods was clarified.(2)The experiment model of flow in crossed karst and cranny was established ,by which the hydraulic characteristic of crossed karst and cranny was tested, and the seepage law of karst and cranny in different cases of size of karst conduit, scale of cranny, hydraulic condition was investigated.(3)The experiment data was analyzed by orthogonal stat method, the influence of cranny wide, karst diameter and inlet head to experiential result was traversed;interior law of experiment was discussed , combining with experiential result;mathematical model of karst conflux was established by means of changeable structure genetic algorithm, basing on dimension analytic.(4)Basing on research findings of indoor experiment, Improved Convert Permeability Coefficients Method considering of crossed karst and cranny was put forward, FEM program KARSTCNPM used to calculate seepage in saturation and non-steady karst was reprogramed. Numerical calculation model of indoor experiment was established, the correctness of the program was validated, during contrasting the result of numerical calculation with the research findings of indoor experiment.(5)The improved Convert Permeability Coefficients Method were applied to the seepage calculation of left bank of Qingjiang Shuibuya project, which result was compared with calculational result of other method. The above results were applied extendly to studying of seepage behavior of Laxiwa project, in which the drainage hole was considered as karst, the suggest on optimizing analyse of antiseepage and drainage was put forward.