Optimization Of CFG Pile Composite Foundation’s Calculation Parameters On Tall Building In Feng Wei Newly-added District

In order to solve a large number of foreign population housing problem in recent years,with the top-high building swiftly developing, CFG Pile Composite Foundation that considered as conservation-oriented foundation and the《Building Foundation Design Code》( GB5007-2011) and the 《 Building foundation treatment technical specifications 》(JGJ79-2012) that can not consider particularity in local area are used widely,hence,This paper deals with amendment specifications that mentioned about this situation.Xian Feng Wei Newly-added District that lies in a terrace,have no natural foundation fitted to build the top- high building,but the natural foundation is theoretically feasible, by CFG Pile design standards to conduct depth correction.In addition, calculation parameters ranges in operation mentioned the 《 Building Foundation Design Code》(GB5007-2011)in this area are not suitable,and this paper will revise the calculation parameters λ、β、ηb,and study variation of play coefficient between pilesβabout CFG Pile Composite Foundation under the different pile diameter, pile length and pile spacing.This paper in the study area of Feng Wei Newly-added Districtlie, using typical venues of A、B、C,by mathematical statistics,analyze the result of pile static load test,study significance of calculation parameters and verify the result of situ detection of composite foundation in typical venues of D,Through the numerical calculate, analyzing depth correction factorηb of CFG Pile we can obtain that sonable value method of depth correction factorηb about CFG Pile Composite Foundation, verify the result of situ detection of composite foundation typical venues of A.By the numerical methods and the load rating,CFG Pile Composite Foundationconstituents-carrying capacity about pile,composite foundation and between piles and test results of deformation,verify the result of situ detection of composite foundation typical venues of A.We can see that,under the different pile diameter,pile length and pile spacing and load rating of CFG Pile Composite Foundation, carrying capacity about pile,composite foundation and between piles and test results of deformation,variation of play coefficient between pilesβabout CFG Pile Composite Foundation will be obtained.The main research results:(1)Under meeting safety,when the parameter λ is equal to the 1.0 and is equal to the 0.8, the desingn of the CFG Pile Composite Foundation is most economical in Wei Newly-added Districtlies.(2)what the most reasonable value method about the depth correction factorηb about CFG Pile Composite Foundation is searching in table of the depth correction factorηb about CFG Pile Composite Foundation using wakest strata.(3)we can get the play coefficient between piles β under the differment condittion of CFG Pile Composite Foundation is slowly lower with the increase of the diameter of the pile, the qualitative law of linear increase significantly with the increase of pile spacing and pile length.