The Rigid Pile Composite Foundation Settlement Characteristics Analysis And Research

Adopted complex modulus method, pile body compression method and the standards ofCFG pile composite foundation settlement calculation method computation or estimate,although in the actual engineering plays a supplementary role, but these methods have theirflaws, because of this, carry out in-depth study of the theory of composite foundationsettlement, the optimized according to the settlement control, the development of the rigid pilecomposite foundation has the extremely vital significance.Construct a3D finite element model, based on finite element software calculation resultanalysis get: Along with the increase of the cushions selected, pile soil stress ratio decreasegradually the pile load for decreasing the soil to bear load increase gradually, the settlement ofsoil increased slightly, the settlement of pile top with the cushion layer thickness and theincrease of reduced slightly. When serveral problems to300mm, serveral problems the pilesoil stress to adjust action has little; Serveral problems the modulus of the rigid pile compositefoundation of pile soil and the realization of the collaborative work has obvious effect. Alongwith the increase of serveral problems modulus, stress ratio will increase, the pile load sharingin change, stress to the pile increased concentration degree, and the soil in reducing load, atthis time, the settlement of pile body increases, the settlement of soil is reduced, when themodulus serveral problems beyond a certain level, the pile of soil and the settlement changestend to level; The pile of elastic modulus to increase foundation settlement of soil reduceincreased load sharing has a significant effect. But when the pile elastic modulus is more thana certain value, the effect is not obvious.Take one small area a high-rise as an example analysis, the results calculated and CFGpile method finite element calculation results were compared with the test result, can draw theconclusion that CFG pile composite by compare actual engineering, the method is reliable.The finite element calculation method is reliable.