进出站管线系统沉降应力测试与分析

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Stress Test and Analysis for Inlet and Outlet Pipeline System of the StationUndertheFoundationSettlement

LINRuinan1*，YANG Hong1，MAO Xuebin1，HUANG Zhonghong²， ZHANG Wen1

1.Gas ManagementOffice，PetroChina SouthwestOil& GasField Company，Chengdu，Sichuan 6lO213，China 2.College ofSafetyandOceanEngineering，China UniversityofPetroleum（Beijing），Changping，Beijing02249，China

Abstract：The foundationsetlement easilyleads tote stressconcentrationand excessivedeformationofthe inletandoutlet pipelinesystemofthenaturalgasstation，andinseverecases，thepipelinemaybedamaged.Tothisend，atestplatformfor setlementstresstestingofnaturalgasstation inletandoutletpipelinesystemincluding2typicalstructuresofinletandoutlet lines，ventpipeandteepipelineasbuilt.Stresstestsofdiferenttypesofpipelinesunderfoundationsetlementwerecaried out.Basedonthetestplatform，thethre-dimensionalmodeloftheinletandoutletpipelinesystemofthestationwas established toanalyze theinfluenceof internalpressureanddiameterthickness ratioonpipeline stress.Theresultsshow that：the most seriousbendingdeformationoftheinletandoutletlineI（buriedmanifolddistributionstructure）ocursatthegroundelbowand thefixed positionofthesupport，andthemaximumtensilestressandcompressivestressofteinletandoutletlineI（Z-saped structure）arebothatthereducing teeofthepipe，thestressoftheinletandoutletlineIIissmalerthan thatofthe nletand outletlineIunderthesamesetlementconditios;Whenthepierinthemiddleofthetepipelinesettes，andthestressofthe pipelineattheinnersideofthefixedsupportsatbothendsandthesetlementpointfarfromthetee increasessignificantlywith thesettement;Whentheground-entryendoftheventpipesetles，andtheverticalsectionoftheground-entryendhasthemost serious deformation，andthe joint sectionbetween theventpipeand the main pipelinereceives the greatest stress.Reducing pipediameter thicknessratioandoperating internal presurecanreduce theequivalenttressduringsettlementand improve the pipelinesafety.Theresearchresultsprovideatechnicalbasis forthesafetyassessment，teselectionofstressmonitoringponts and the settlement warning of the inlet and outlet pipeline system in natural gas station.

Keywords：naturalgasstation;foundationselement;inleandoutletpipelinesteofthesation;stresstest;tresalyis 网络出版地址：http：//kns.cnki.net/kcms/detail/51.1718.TE.20241230.1331.002.html

引言

站场作为天然气输配系统的重要节点，承担着天然气增压、分输及配气等功能，其安全问题显得尤为重要[1-5]。（剩余17207字）