Study On The Influence Of Material Zoning Of Concrete Face Rockfill Dam

With the development of the water conservancy project in China,establishing a lot of rockfill dam in all parts of the country.Due to rockfill dam stone exposed large area,which makes the dam,dam slope and the ecological environment disharmony.Although the dam slope greening ecological restoration has much work to been done,the lack of a real and effective in engineering dam slope greening ecological restoration methods;Therefore this paper proposes a pipeline cultivated greening plant arrangement in rockfill dam downstream dam slope greening ecological restoration.using the simulation software of ABAQUS to cultivation of pipeline before and after the dam stress and strain are analyzed.the existing research and the practical engineering shows that parts of the stress and strain are influenced by material partition,furthering study of dam partition of different material,to improve safety and economy of earth-rockfill dam is of great importance.Here in combination with ya river finite element simulation of concrete face rockfill dam,analysing the dam body under the condition of different material partition rockfill dam stress and strain.In this paper,the research and the results are as follows:1.The pipeline cultivation of plant arrangement in a homogeneous rockfill dam downstream dam slope,using ABAQUS software after the dam impoundment Duncan E-B model calculation under different load and different pipe spacing of stress and strain.The calculation results show that the dam stress increment largest maximum 2 Kpa,largest dam displacement increment the maximum is 0.05 cm,which has little impact on the dam's stress and strain,so the dam body can be neglected.Show that the technical scheme is reasonable and feasible,and the technical scheme can be applied to practical engineering.2.Setting up ya river reservoir CFRD three-dimensional model,analysing the dam in completion period and storage period of stress and strain.Results show that the stress strain contours can better reflect the deformation law of dam body,and the simulation result is consistent with the actual engineering experience.according to different pile of stone line slope of primary and secondary material partition,the results show that with the enlargement of the areas heap of stones,horizontal displacement of dam body,panel compressive stress,the downstream dam slope safety factor.Largest dam horizontal displacement increases 9 cm,panel compressive stress biggest change is 0.4 MPa,safety coefficient maximum reduce 0.25;Pile of stone area expanded over time,the settlement of dam body,principal stress,tensile stress in the panel,which means panel had a greater influence on the deflection.Maximum subsidence increase 24.92 cm,dam principal stress maximum tensile stress increases 0.157 MPa,panel 0.9 MPa,and panel deflection biggest increase 6.13 cm.3.To simulate the different thickness of cushion on the influence of rockfill dam,the results show that with the cushion layer thickening,the panel had a greater influence on the tensile stress,and tensile stress maximum increment of 0.4 MPa.Press on the panel have little impact on stress.The deflection and stress biggest change value of 0.2 MPa,the deflection of the largest increase 2 cm;Cushion thickness change has no effect on the dam,then dam settlement and stress was nearly unchanged.