多类算法融合的基坑沉降组合预测分析

打开文本图片集

中图分类号：U459 文献标志码：A 文章编号：1005-8249（2025）03-0128-06

DOI：10.19860/j.cnki.issn1005-8249.2025.03.023

Abstract：Toachieve high-precision predictionoffoundationpitsettlement，basedontheon-sitesettement monitoring

resultsof the foundation pit，thepolarsymmetricmodedecompositionalgorithmis firstusedtodecomposethesetlementdata，

obtaining several modal componentsand trend components.Then，thegrey wolf algorithmandgatedrecurrent unit neural

networkareused toconstructacombined prediction model，and thismodel isused topredictthedeformationof each modal

componentandtrendcomponent，inordertoobtainthecombined predictionvalueoffoundationpitsetlement.Theanalysis

results indicatethatcommonsetlement monitoring itemsduringfoundationpitconstructionincludesurfacesettlement，pittop

setlement，andbuildingsetlement；According tomonitoringdataanalysis，theremaining deformationspaceofthepittop setlementisrelativelythelargest，followedbybuildingsettlementandsurfacesetlement；Overall，theremainingdeforation spaceforthethree typesofsetlementanddeformationprojectsisstillrelativelyoptimistic，withonlyasmall numberof monitoring points having limitedremaining deformationspaceincertainareas；Intheprocessofdataprocessing，thepole symmetric mode decompositionalgorithmhasstrongdataprocessingability，anditsabilityissignficantlybetterthanthedata procesing efectofwaveletdenoisingand mode decompositionmethods.According toGWO-GRU prediction，therelativeerror mean of the prediction results of this model in three types of setlement projects is around 2% ，which has high prediction accuracy.Te predictionresultsshowthatthedevelopmenttrendofthethree typesofsetlementdeformationisrelatively consistent inthefuture，showingasmallrate increase trendandobviousconvergencecharacteristics.Thisindirectlyverifiesthe goodoperational efectoffoundationpitsupportmeasures．Throughresearch，itcanprovidetechnicalreferencesforsimilar projects and has certain practical significance.

Key words：excavation pit；setlement deformation；data decomposition；grey wolf algorithm；combination prediction

0 引言

近年，随着城市化进程的加快，基坑工程数量越来越多，基坑开挖会引发基坑周边土体变形，基坑沉降变形属基坑施工过程中的必测项目，姜伟玲等[1]、仇安兵[2]认为开展基坑沉降变形的相关研究具有较强的现实意义。（剩余6234字）