深埋圆形巷道围岩和衬砌相互作用解析解

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1、Seediscussions,stats,andauthorprofilesforthispublicationat:https://www.researchgate.net/publication/289392461Analyticsolutionforrock-linerinteractionofdeepcirculartunnelArticle·March2011CITATIONSREADS3113authors,including:Shun-ChuanWuUniversityofScienceandTechnologyBeijing187PUBLICATIONS425C

2、ITATIONSSEEPROFILESomeoftheauthorsofthispublicationarealsoworkingontheserelatedprojects:StrengthCriteironViewprojectRockmasspropertyViewprojectAllcontentfollowingthispagewasuploadedbyShun-ChuanWuon30December2017.Theuserhasrequestedenhancementofthedownloadedfile.第28卷第3期Vol.28No.3工程力学2011年3月Ma

3、r.2011ENGINEERINGMECHANICS136文章编号：1000-4750(2011)03-0136-07深埋圆形巷道围岩和衬砌相互作用解析解*吴顺川，潘旦光，高永涛(北京科技大学土木与环境工程学院，北京100083)摘要：围岩采用Mohr-Coulomb屈服准则、衬砌采用双线性本构模型，提出广义荷载作用下深埋圆形巷道中围岩和衬砌相互作用体系弹塑性解的解析表达式。在此基础上，研究了围岩的位移、位移灵敏度和塑性区等随广义荷载的变化规律。根据参数分析和实例计算得到：1)围岩或衬砌由弹性进入塑性，位移灵敏度将发生突变；2)位移灵敏度在弹性区和塑性区的交界面上发生突变；3)

4、根据位移灵敏度的变化情况，可判断围岩和衬砌共同作用体系的稳定状况，并由临界塑性区半径比判断失稳区域的范围。关键词：圆形巷道；围岩-衬砌相互作用；弹塑性分析；解析解；位移灵敏度中图分类号：TD350;U451文献标识码：AANALYTICSOLUTIONFORROCK-LINERINTERACTIONOFDEEPCIRCULARTUNNEL*WUShun-chuan,PANDan-guang,GAOYong-tao(SchoolofCivilandEnvironmentalEngineering,UniversityofScienceandTechnologyBeijing,Be

5、ijing100083,China)Abstract:Inordertoanalyzetheplasticevolutioncharacteristicofrock-linerinteractionforadeepcirculartunnel,theelastic-plasticanalyticsolutionforrock-linerinteractionisdevelopedundergeneralloadings，inwhichtheconstitutivemodelsofsurroundingrockandthelineraretheMohr-Coulombandbil

6、inearmodelrespectively.Basedontheanalyticexpression,displacement,sensitivityofthedisplacementandplasticzoneofsurroundingrockvaryingwithgeneralloadingaredetermined.Theresultsofparametricinvestigationandexamplecomputationshowthat:1)providedthatthesurroundingrockorthelineristransformedfromanela

7、sticstagetoaplasticstage,thesensitivityofdisplacementswillhaveasignificantchange;2)thesensitivityofdisplacementsvaryingwithpositionswillbediscontinuousintheinterfaceoftheplasticandelasticzone;3)accordingtothesensitivityofdisplacements,thestabilityo