Deformation And Stability Control Technology Of Pile Stake In High Filling Slope At The Dam's Reservoir

Harbors,bridges and other construction projects are increasingly encountered complex terrain geological environment,part of the approach bridge pile foundation must be worked and constructed in deep fill slope.due to deep backfill soil around pile stake and slope,deformation law of the pile foundation under the action of lateral force stress is more complicated.his paper on the basis of the science and technology project of the si chuan provincial transport and transport bureau,"The loading characteristics and the key technical research of the pile in deep fill slope effected by Reservoir Region water",by adopting the combination of indoor model test and numerical simulation method,analysis and study different backfill soil and pile in deep fill slope pile foundation deformation,and the stability technology of pile foundation in deep slope is put forward.In general,the main results of this paper are as follows:Firstly,the study on finite element analysis method for stress deformation of Pile foundation in backfill slope.ANSYS finite element software is used to analyze the stress deformation of the pile under static load.The solid element is used to model and the high-precision hexahedral mesh is used to overcome the problem that the rod unit can not accurately simulate the pile The error of the soil interaction is compared with the existing experimental data,and the correctness of the finite element method used in calculating the deformation of the pile foundation in the backfill slope is verified.Secondly,the study of single-pile force deformation in deep filling slope.By establishing a finite element model under different working conditions,deformation and stress distribution on pile foundation is analyzed,studied the filling thickness,pile diameter,backfill soil Angle of internal friction and the relationship between the deformation of pile body,the pile foundation in deep fill slope stress deformation law: the deformation of the pile will gradually change from the linear elasticity to the elastic-plastic buckling deformation with the increase of the fill thickness.The main factors of the deformation of the pile foundation in the deep slope are analyzed Influencing factors,which lays the foundation for the deep stabilization of pile foundation in deep slope.Thirdly.The study of the stability control technology of double row pile structure in deep filling slope.According to the characteristics of the deflection of the pile in the deep slope,the technical scheme of the two-row and double-row pile structure stabilization is proposed,the stability of the structure with double row pile decrease the deformation of pile body.In order to optimizel of different support height is established by finite element method and solved.The results show that the h-type structure in the deep-fill slope can effectively reduce thedisplacement of the pile top,and the deformation of the pile can meet the technical requirements of the stability control.The effect of the portal structure on the displacement of the control pile is not obvious.Finally,the study on steady control technology of Anchor structure in deep Slope.Aiming at the shortcomings and shortcomings of the h-type structure control scheme in controlling the maximum displacement of the pile body,the technical scheme of the anchorage structure stabilization is put forward,and the finite element model with different anchoring height is established.The calculation result of the anchor structure is carried out with the h-type structure The results show that the anchorage structure can effectively reduce the displacement of the pile top and the maximum displacement of the pile,which reduces the maximum displacement of the pile by 40% to 55%.The maximum horizontal displacement of the pile is only45% to 60%.when the anchor structure is adopted at the same supporting height...