基坑开挖影响下临近地下管线的力学行为分析

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中图分类号：TU473.2 文献标志码：A 文章编号：1005-8249（2025）03-0078-06

DO1：10.19860/j.cnki.issn1005-8249.2025.03.015

Abstract：Inorder tostudytheinfluenceofdepfoundationpitexcavationonthemechanicalbehaviorofadjacentunderground pipelines inthesoftsoilareaof Nanjing，thedeformationlawofundergroundpipelinesindiferentsituationsisanalyzedby numerical simulation methodconsideringthecomplexconditions intheprocessoffoundation pitexcavation.Theresultsshow that：theverticaldisplacementandbending momentoftheunderground pipelineshowsymmetrical distribution，andreachthe peakvalueonthesymmetrical surfaceof thepitexcavation；theinfluenceof pipelinediameter，pipelinematerial，and horizontaldistancefromtheedgeofthepitonthemechanicalbehaviorofthepipelineisrevealed；whenthehorizontaldistance betwenthe pipelineandtheedgeof thepitisincreased，thedisplacementandbending momentof thepipeline show the tendencyto increasefistlyandthen decrease，andthedisplacementand bending momentof the pipelinereach the maximum valueathedistanceofO.5timesofthedepthof hepitexcavation.AtadistanceofaboutO.5timesofthepitexcavationdepth， thedisplacement andbending moment of the pipeline reach the maximum value.Through thein-depth studyof these key

parameters，itcanefectivelyguidethepipelineprotectionandmonitoringwork intheactual projecttoensurethesafetyand stability of underground pipelines.

Key Words： foundation pit excavation；pipeline；numerical simulation； single factor analysis

0 引言

随着城市的发展，地上建筑用地日趋紧张，城市建设逐渐转向地下空间发展，与之相应的深基坑工程日益增多。（剩余6275字）