考慮相鄰點(diǎn)影響的基坑沉降優(yōu)化組合預(yù)測(cè)分析

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關(guān)鍵詞：基坑；沉降變形；單項(xiàng)預(yù)測(cè)模型；優(yōu)化處理；組合預(yù)測(cè)

中圖分類(lèi)號(hào)：TU43 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1005-8249（2025）03-0122-06

DOI：10.19860/j.cnki.issn1005-8249.2025.03.022

Abstract：Inorder toachieve high-precision predictionoffoundation pitsetlementanddeformation，basedonthesummaryof theshortcomingsoftraditionalcombinationpredictionmodels，asinglepredictionmodelscreningisfirstcarriedout，andthe parametersofeach singlepredictionmodelareoptimized；Secondly，furtheroptimizationof nonlinearcombinationand distance between nodes，aswellasconsiderationofoptimizationofadjacent nodes，iscarriedout toachieveoptimizedcombination predictionoffoundation pitsetlement deformation.Exampleanalysis shows that：TheELMmodel，GM（1，1）model，and SVR model have goodcomplementarityandcan beusedas basic prediction models.Throughoptimized combination processing in thesetlement deformation prediction process，the averagerelative error of the predicted resultsranges from 1.56% to 1.65% ，with high predictionaccuracyand robustness.The prediction resultsarecompared with those of traditional models， andit isconcluded thatthepredictionmodelhasrelativelybeterpredictionaccuracy，whichverifiestheefectivenessof its construction ideaandissuitableforpredicting foundation pitsetlementdeformation.Throughresearch，weaimto provide theoretical guidance for the study of deformation laws in foundation pits.

Key Words：foundationpit；selement deformation；singlepredictionmodel；optimizationtreatment；combinationprediction

0 引言

基坑工程的復(fù)雜性強(qiáng)、施工難度較大，在其施工過(guò)程中，時(shí)有事故發(fā)生，如2015年7月，禪城區(qū)某工程基坑一側(cè)出現(xiàn)坍塌，雖未造成人員傷亡，但經(jīng)濟(jì)損失嚴(yán)重；2017年5月，深圳某基坑塌方事故，造成3死1傷，損失嚴(yán)重；如2024年6月，成都某基坑出現(xiàn)垮塌事故，造成了較大的經(jīng)濟(jì)損失[1]。（剩余6911字）