Finite Element Analysis And Application Of CFG Pile Compound Foundation’s Mechanical Property

CFG pile compound foundation is a common method of foundation treatment, whichis applied to many actual projects. But much practices show that there are manyproblems in theoretical design, site construction and monitoring of CFG pile compoundfoundation. Plie parameter and mechanical property application are studied in an realproject of CFG pile compound foundation.The values of pile parameter are empirical in conventional design. The real project isnumerically simulated by FEM software, The evolvement rules of horizontal displacement,settlement, global stability of embankment and pile end resistance are acquired with pilelength change, then the pile length is optimized after judging above mentionedinformation. the feasibility of optimized scheme is verified on the basis of pile loading testand integrity testing of pile.The pile-soil stress ratio is discovered as a variable with loading, and tends to a fixedvalue, and the cushion thickness is an important factor to pile-soil stress ratio. Theoptimum cushion thickness and pile-soil stress ratio are found by the relationship diagramabout them, which provides technical advice for engineering design and construction.The deformation characteristics of CFG pile compound foundation is studiedcombining with the monitoring result of horizontal displacement and settlement, Thedeforming resistance capability of CFG pile compound foundation is better than naturalfoundation, but the improvement extent of deforming resistance capability has diversityinfluenced by many factors. The total settlement calculated by method of recommendedby teaching book is higher than actual value, then a modifier formulas is put forward toimprove computational accuracy after the subjacent strata settlement is reduced, in whichCFG pile compound foundation is regarded as two-layered ground, and the characteristicsof stress dispersion is considered.