Study On Rigid Plastic Combination Method Of High Earth Rockfill Dam With Reinforced Earth Wall

Earth and rockfill dam type as a dam with a long history,because of its simple structure,easy to use local materials,the foundation and the advantages of strong adaptability,simple construction technology is widely used in water conservancy and hydropower engineering.With the rapid development of water conservancy projects,more and more high earth-rockfill dam constructed.In earth dam reinforcement,concrete cut-off wall soil because of its material properties and the larger gap of natural material,the analysis of stress and deformation,put forward higher requirements.In this paper,combined with a barrage of narrow mouth reservoir,with the earth and rockfill dam as the research object,using the ADINA software to dam 3 d mesh model is set up,the dam body and the deformation and stress of the diaphragm wall simulation,to compare the rigid-plastic combined cut-off and the ability to adapt to the plan of rigid seepage deformation.Based on the construction and operation period working condition of two kinds of nonlinear analysis,the rigid-plastic combined cut-off is determined.Articles on construction condition of considering water maximum water levels,the runtime to irrigation water,the design flood level and check flood level,four kinds of conditions,such as the conditions produced by the two kinds of cut-off project construction and operation period of the deformation and stress of the dam body under the condition of comparative analysis,according to the resulting results,it is concluded that rigid diaphragm wall and rigid-plastic combination cut-off dam stress are within the scope of the permit,but considering the dam for the new dam body height 648.0 meters,run of the early settlement is larger,the dam itself without the high water level test,relatively stronger rigid-plastic combination scheme to adapt to the deformation ability,adopting rigid-plastic combination through the analysis of the various aspects.The plan of dam body seepageUnder different working conditions,by analyzing the numerical simulation of the distribution regularity of the deformation and stress of the dam body,which is based on just the plastic concrete cut-off wall is determined,successfully solved the high earth and rockfill dam reinforcement cut-off coordinated with the old dam deformation problem.This scheme can not only adapt to the actual situation of the dam body,reduce the stress of the dam body,still can save investment,embodies the contemporary engineering safe,reliable,the design concept of the economy.