Evaluation Of The Stability Of Bridge In Reservoir Area After Hengjiangriver Area Power Station Water Storage

After the Hengjiang river power station water storage, the stability of bridge in reservoir area which affected by the changes of water level will be change, the stability of bridge will influence the security of neikun railway.On the basis of the full use of existing data were collected in this thesis, indicating the slope engineering geological conditions and rock mass structural characteristics of the researched region.Clarified the impacts of water on the bridge pile foundation and bank is mainly the influence of water-rock interaction, it includes physical, chemical, and mechanical action. Through analyzing the influence of water to the railway bridge,obtains14bridges will be destrored, Then select three bridge slop as the research object to analysis the influence of water in the slop,first use the Cacho method to predict recycling width of water impact on reservoir banks, The results show that the slope of banks in reservoir will occur bank collapse in different levels;Then using FLAC-3D to simulate the stability and failure mechanism of the slop under natural condition and water storage condition,The result shows that it is stable and has almost no displacement under natural condition, but it is unstable under water storage condition and it is likely to occur bank collapse phenomenon,then there will be a greater impact of the stability of the bridge pier on the slope position.At last, The thesis summarized the common type of bridge foundation diseases caused by water,mainly includes foundation subside, foundation slide, foundation topple, foundation corrupt,and through analyzing the requirement,mechanism and the impact to the bridge of diseases,put forward reasonable disposition advices to the bridge in reservoir area.