煤矸石型cfg模型桩的竖向极限承载力试验研究

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1、延边大学工学硕士学位论文ageandlogarithmicfunctioncanbeusedtofit.Whencement-mixedratiolocateswithintherangeof10~14%,strengthincreaserateofgangueconcreteishuge.Whencement-mixedratioislargerthan14%,increaseratioofgangueconcretestrengthisdecreasedsignificantly.Compressivestrengthofgangueconcretehasrelationshipof

2、quadraticequationofonevariablewithcement-mixedratio.CompressivestrengthofgangueconcreteatYanbianareadecreasesfollowingincreaseofganguereplacingratio.C3isconsideredthebestrationcombinationtakingintoconsiderationofsafetyfactorandeconomicfactorwithconcrete:coalash:water:gravel:self-ignitiongangue=24

3、7.8:106.2:177:780:468.4:702.6.(2)Followingtheincreaseofreplacingratioofgangue,limitbearingofmodelpileislowering.Atthesameverticalload,increaseratioofsedimentationvalueofmodelpileisincreasing.Thedamageisattheupper1/3ofthepile.DamagepowerofcoalgangueCFGpileisthesimilartothatofcommonCFGpiles.Inthebe

4、aring–straindiagram,loadsharedatthetopofpileishuge.Atthetopofthepile,strainincreaseratioofstraintestingpointgrowsatasignificantlyfasterspeedthanthatofothertestingpoints.(3)Throughthe12CFGlimitmodelofcoalganguepilestaticloadtestofbearingcapacity,putsforwardthecalculationformulaofthebearingcapacity

5、ofthereferencemodelofCFGpileofcoalgangue:N0.361fA86.107，R2=0.8293。ukcup(4)ThreepredictiontestofgreytheoriesareappliedtolimitpredictloadofsinglecoalgangueCFGmodelpile.PredictionvalueisanalyzedandmanagedtogetthenewiterationGM(1,1)modelwhichhashigherpredictionprecisionforsinglepileloadlimitperfect

6、informationGM(1,1)andunequal-stepGM(1,1).Followingupdatingofmodelsysteminformation,developmenttrendreflectingdatasystemisnewlyadded,whichcanhelpimprovepredictionprecisionofmodel.AverageabsoluterelativeerrorofpredicationvalueofcoalgangueCFGsinglepileloadlimitobtainedbasedonUshermodelandmeasuredval

7、uefromstaticloadIV万方数据延边大学工学硕士学位论文testis2.71%.Accordingtopredictionresultofloadlimitofpiles,Ushermodelisbetterthangreytheorymodelandisofhigherpredictionprecision.(5)BasedonfiniteelementanalysisofcoalgangueCFGmodelandco