广阳湾站超大断面暗挖车站施工稳定性数值模拟研究

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中图分类号： U231+.3 文献标志码：A 文章编号：2095-2945（2025）30-0059-05

Abstract：Theconstructionof super-large-sectionundergroundexcavationstationsfaceschallengessuchaspoorstabilityof surroundingrock，dicultyinpredictionofdeformationdifcultyinconstruction，geaterimpactonthesurroudingenviroent， andhighconstructionsafetyrisks.Takingtheultra-large-sectionconcealedexcavationstationofGuangyangwanStationasthe engineeringbackground，Midas/GTSXisusedtoestablishanumericalcalculationmodelfortheonstructionofdoublesidewal headingfortheultra-large-sectionconcealedexcavationstationofGuangyangwanStationtostudythestressfield，displacement fieldandsufacesettlementtrendofthesuroundingrockatkeypointsofthestationstructureduringconstruction.Theresults showthatthedisplacemntofsurroundingrockissignificantlyafectedbystationexcavationandtempoarysupportremovalnd theexcavationofultra-largecross-sectionwillincreasethedisplacementrangeandvalue.Theverticaldisplacementchanges significantlybeforeandaftercoresoilexcavation，andthehorizontaldisplacementismostprominentatthefootofthewall.The designofthesupportingstructureplaysakeyroleinthedisplacementchange.Theresearchresultscanprovidereference materials for ultra-large-section underground excavation station projects.

Keywords：super-large-sectionundergroundexcavationstation;surroundingrockstability；numericalsimulation；subway; displacement change

21世纪以来，随着社会的迅猛发展，地铁施工技术得到极大提升，暗挖法因其占地面积小、对周边环境影响小的优点被广泛应用，目前常用的地铁车站暗挖方法包括洞桩法（PBA法）、双侧壁导坑法、拱盖法、中隔壁法（CD法）和交叉中隔壁法（CRD法）等[-3]。（剩余5065字）