Structural Safety Evaluation Of300M High Concrete Face Rock-fill Dam

With the improve of the vibrating roller compaction technology, the development ofconcrete faced rockfill dam in the dam height is rapid. Due to the mechanism of the stress、deformation stable and panel cracks of the high concrete face rockfill are more complex，which made the high rockfill dam panel structural cracks more commonly, endangered thesafety of the dam.So the past empirical design and specification has not been used any more.The seepage characteristics of the dam, slope stability, as well as static and dynamicanalysis have been studyed, which using finite element analysis software study. Specificactivities include the following:(1) The different conditions of the dam’s seepage field have been obtained throughthree-dimensional finite element simulation. With the crack from the bottom to the up, get thevariation of the flow elements and discharge. Taking into account the complexity of thephysical、mechanical properties and the conditions of the dam material variability, made theorthogonal sensitivity calculations of the permeability coefficient. Through the finite elementsimulation seepage of empty cracks and warping cracks, analysis the variation of the cracknear the flow elements, and verify the proposed warping healing watertight have a goodeffect of seepage control，and put forward the suggestions of improve and enhance the heapdam stable and secure technical measures.(2) By the analyzing of the maximum hydraulic gradient of the panel, cushion, transitionand rockfill zone, evaluate the possibility of the districts occur infiltration and sabotage. Withthe combine of limit equilibrium method and strength reduction FEM, has got the extremeconditions’s potential slip surface and stability safety factor.(3) Duncan Chang E-B model has been used on the300m level of high concrete facerockfill dam’s whole process of simulation analysis. Though the study in the law of differentextreme conditions of stress and deformation of the dam, which provide the basis of300mlevel‘s high concrete face rockfill dam of the stability analysis, as well as the improvementmeasure of the dam deformation. (4) In order to further verify the structural stability of the high concrete face rockfill dam,earthquake response spectrum has been used in dynamic analysis. Focusing on dynamic stressand dynamic displacement, when the dam suffered earthquake in an empty reservoir and fullreservoir. And finally proposed the relevant seismic measures.