Study On The Slope Stability Of Bridge Over Jinsha River In Sichuan-Tibet Railway

Sichuan-Tibet Railway not only a routes for Tibet and area along the railway face to the east,but also strategic component of national railway network according to mid-long term program.Bridge-tunnel is the major of railway taking into account the terrain.The long span bride where over Jinsha River in Baiyu county is a controlled bridge,the slope stability of bridge foundation is vital to strike and safety operation of railway,so my paper focus on study on the slope stability of bridge over Jinsha River.The research content and main results are as follows:1. Sarma method together with engineering geological prospecting is adopted to calculate the stability coefficient under different drainage conditions for the fractured rock mass where in the toe of the left bank.2.Getting the strength parameters of foliation and dominant joint based on equivalent shear strength method.Studying units of rock mass slope which consists of discontinuous surface.Calculating the stability coefficient of all cutting bodys,then analyze the stability of rock mass.3.Simulating stress-displacement characteristics of the rock mass slope and it’s failure trend under different conditions by using finite element method.4.Discrete element method is adopted to research the stress-displacement features and development of yield point,even the formation of plastic processing on the jointed rock mass slope under different working conditions.5.Evaluating the stability of bridge over Jinsha River generally according to achievement derived from kinds of calculation method and simulation.