Research And Improvement On Foundation Bearing Capacity And Settlement Calculation Method Of CFG-pile-composite Foundation

For the foundation bearing capacity of CFG-Pile-Composite Foundation workstreated the contrary, even lower than the natural foundation bearing capacity withouttreatment and with the control of the overall bearing capacity and foundationsettlement, the settlement calculation values of Composite Foundation is much largerthan the measured data,which has caused great waste, the actual bearing capacityformula and settlement calculation method instance to verify the reasonableness ofnumerical simulation analysis and engineering are on the way, in order for thepurposes of engineering economic and security.(1) Deficiency analysis of the current code about foundation bearing capacityformula and settlement calculation method;(2) Propose two new formulas, the bearing capacity formula which soil betweenpiles is firstly corrected in depth and width, and then calculate the bearing capacityand the settlement computation formula which contains the sample disturbancemodified coefficient η and the assumption of lateral restraint modified coefficient β onthe effects of deformation modulus Es aspect corrections;(3)According to the new bearing capacity calculation formula，by the inverseanalysis of depth correction coefficient, the purpose is to draw a more reasonablepractical depth correction coefficient;(4) The finite difference software’s Flac3D numerical simulation is used toanalyze the foundation settlement calculated by the new the new bearing capacityformula and settlement calculation method in establishment the CFG compositefoundation pile group model. model building,in order to verify that the new carryingcapacity formula and amendments to the proper settlement calculation method;(5) by comparative analysis of settlement observation data on the CFG compositefoundation works in Beijing’s Fangshan District and1#、2#buildings in the south ofresidential district for General Staff retired cadres, the purpose is to improve theinaccurate about the deformation modulus in reconnaissance report and the revisedsettlement calculation method.