DOI:10.19807/j.cnki.DXS.2023-03-048基于数值模拟的连拱隧道所受应力和塑性区研究雷生强1,王增利1,杨凌云2(1.中顾国际工程咨询有限公司,四川成都610000;2.中国电建集团成都院建设管理部,四川成都610000)[摘要]连拱隧道开挖完成后是否达到工程要求,对此本文结合一实际连拱隧道工程,利用数值模拟对开挖后衬砌的应力、塑性区和岩土体的塑性区进行了研究,研究结果表明:(1)衬砌进口处出现部分应力集中,但是数值控制在工程允许的范围内,不会对工程造成安全隐患;(2)衬砌所受的弯矩分布较为均匀,可知衬砌所受的弯矩分布合理;(3)衬砌没有发生塑性变形,地面以下10m岩土体范围内出现部分塑性区,此部分塑性区是由于隧道开挖扰动造成的。以上的研究可供类似的连拱隧道工程提供参考。[关键词]连拱隧道;衬砌;应力和弯矩;塑性区[中图分类号]TV554+.16[文献标识码]A[文章编号]1004-1184(2023)03-0140-03[收稿日期]2022-07-26[作者简介]雷生强(1980-),男,陕西富平人,高级工程师,主要从事岩土工程与工程地质方面工作。StudyofstressesandplasticzonesincontinuousarchtunnelsbasedonnumericalsimulationLEISheng-qiang1,WANGZeng-li1,YANGLing-yun2(1.ZhongguoInternationalEngineeringConsultingCoLtd,Chengdu,Sichuan610000;2.ConstructionManagementDe-partment,ChengduInstitute,CEC,Chengdu610000,Sichuan)Abstract:Thispaperinvestigatesthestressesintheliningafterexcavation,theplasticzoneandtheplasticzoneofthegeotechnicalbody,usingnumericalsimulationsinconjunctionwithanactualcontinuousarchtunnelproject,theresultsofthestudyshowthat:(1)somestressconcentrationsoccuratthelininginlet,butthevaluesarecontrolledwithintheengineeringallowablelimitsanddonotposeasafetyhazardtotheproject;(2)Thedistributionofbendingmomentstowhichtheliningissubjectedisrelativelyuniformandthedistributionofbendingmomentstowhichtheliningissubjectedisknowntobereasona-ble;(3)Noplasticdeformationoftheliningoccurred,andapartialplasticzoneappearedwithinthegeotechnicalbody10mbelowgroundlevel,thispartialplasticzonewascausedbythedisturbanceofthetunnelexcavation.Theabovestudycanbeusedasareferenceforsimilarcontinuousarchtunnelprojects.Keywords:Continuousarcht...