Three-Dimensional Finite Element Analysis On Bank Slope Stability Of Mashuihe Bridge In Yichang-Wanzhou Railway

Mashuihe River Bridge is the key engineering of Yichang-Wanzhou railway. Study on the bank slope stability of Mashuihe River Bridge is required urgently in engineering construction.In the text, by constitute three-dimensional bridge bank slope model, to rock mass slope treated with homogeneous material, the stress and displacement characteristics of rock mass under load are analyzed in detail, studied the change of grade and shape of bank slope which influenced the mechanics behavior of rock mass, open out the change rule of the slope rock mass stress incidence and displacement character under differ grade and shape.By the analyse, the load has definite incidence to slope bank, the incidence accretion along with the grade for the plan surface bank; the incidence also relate to the plane nip angle , in the homology grade, the incidence accretion follow the plane nip angel.The level displacement and vertical displacement of the bank slope surface rockmass witch effected under the load relate to the slope grade, level displacement and vertical displacement accretion along with the slope grade; and the appearance position of the level displacement max shoal; the displacement characteristic of the convex bank slope surface rockmass relate to the nip angle of two slope surface.Base on the research upwards, the text educed the confirm means of three-dimensional bridge location, used the means to confirm location of mashuihe Bridge.: the bank of Yi Chang is 20.9m and the bank of Wan Zhou is 12m. the research indicated under the design load ,displacement of the slope bank surface is minuteness and has small infection to the stability of bridge base, the intension of the slope rockmass content require. The Mashuihe Bridge is stabilization under the design load.