The Deformation Numerical Analysis of Geobelt-Reinforced Foundation

The nonlinear finite element analysis on geobelt-reinforced soil composition foundation is done by using ANSYS software. The geobelt-reinforced soil is regarded as one model Duncan-Chang nonlinear model, the soft soil around reinforced soil is treated as Drucker-Prager elastic model and the calculate parameters of geobelt-reinforced soil are obtained by the large-scale triaxial consolidation drained shear tests. The load-settlement curves of FEC reinforced foundation and observation in-situ are good consistency and it shows the calculation model correctly and the calculation parameter reasonable. The vertical deformation numerical analysis of geobelt-reinforced foundation indicate that the reinforced foundation deformations decreased with reinforced cushion width and thickness increased and the reinforced foundation vertical deformation along horizontal direction attenuates fast than the deformation along depth direction due to cushion dimensional effect. Reduce reinforced foundation settlement by means of increasing foundation width is not significant when the ratio of the reinforced cushion thickness and width less than 0.12. Combined with Taiyuan practical engineering, when foundation width of less than 6 meters and more than 6 meters of large raft foundation respectively, the reinforced foundation deformation calculate effect depth is two times and one time the width of foundation respectively.