大跨度公路橋梁樁基極限承載力預(yù)測方法

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關(guān)鍵詞：極限承載力預(yù)測；大跨度公路橋梁；樁基；灰色理論模型；非線性映射；橋梁樁基承載力中圖分類號：TU473. 1 + 6 文獻(xiàn)標(biāo)志碼：A 文章編號：1005-8249（2025）02-0160-04DOI：10.19860/j.cnki.issn1005-8249.2025.02.027

Abstract：Conventionalpredictionoftheultimate bearingcapacityoflong-span highwaybridge pilefoundation mainlyuses the method fextractingcharacteristicparameters foriterativeoptimization toobtainthepredictionresults，ignoringtheinfluenceof characteristic parameterdimensions onthe predictionresults，resultinginalarge Mean squared erorof the predictionresults. Therefore，a prediction methodofthe ultimate bearing capacityoflong-span highway bridgepile foundation basedon the grey theorymodelandnonlinear mapping isproposed.Theloadtransfer parametersarecalculatedaccordingtothe stressareaof the pilefoundationofthelong-spanhighwaybridge，andthegreytheoreticalmodelisestablishedtorestoretheparameter sequence.Therestoredparametersarenonlinear mapped toreducetheparameterdimensions，calculate thebearingcapacityof the pile foundation，and predict basedonthecalculationresults.Theexperimentalresultsshowthatthemean squaredeorof thepredictionresultsobtainedaftertheproposedapplicationislow，theaveragevalueisonlyO.O42，andthepredictionresults are relativelyaccurate，meting the construction design requirements of long－span highway bridge pile foundations.

Key words：predictionof ultimate bearing capacity；large-span highway bridge；pile foundation；greytheory model；nonlinear mapping；bearing capacity of bridge pile foundation

0 引言

隨著交通基礎(chǔ)設(shè)施建設(shè)的快速發(fā)展，對大跨度公路橋梁建設(shè)的需求日益增加。（剩余4783字）