Numerical Study on Working Performance of a New Gravity-Double Plate with Pile Foundation Composite Retaining Structure
In order to reveal the working performance of the new Gravity-Double plate with pile foundation composite retaining structure for high fill slope,based on a practical engineering example,the three-dimensional finite element calculation model of a design profile of the retaining structure was established by using the finite element numerical calculation software.The working performance of the new composite retaining structure was comprehensively understood by analyzing the distribution laws of the bending moment,shear force and the axial force of the foundation piles,the bending moment,shear force and the earth pressure of the higher-plate,the bending moment and shear force of the pile-cap.Meanwhile,on the basis of the numerical calculation and analysis,a series of measures beneficial to engi-neering practice were proposed.Using the strength reduction finite element method embedded in the software,the safety factor of the earth-retaining system was computed.The results show that the new composite retaining structure has higher stability and reliable earth-retaining capability.The optimiza-tion of parameters shows that the buttress plate plays an important role in adjusting the bending moment distribution of the higher plate,and the anti-bending bearing of the higher plate capacity can be mobi-lized better when the height of the higher plate is set between 0.50H and 0.75H;The overall safety fac-tor of slope increases with the increasing of the pile length,but when the pile length increase to the 1.5 times of the slope height,the overall safety factor will not increase obviously by further increasing the pile length.
万方数据
维普
