%0 Journal Article
%T 深埋隧道开挖围岩失稳突变模型研究
%A 祝云华
%A 刘新荣
%A 黄明
%A 李晓红
%A 舒志乐
%J 岩土力学
%D 2009
%X byanalyzingsurroundingrockinstabilitycausedbytunnelexcavation,surroundingrockinstabilityofdeep-buriedtunnelsisconsideredasasuddenfailurephenomenon,whichpossessesnonlinearityanddiscontinuityobviouslyandshowstheuncertaintyofmechanicaldeformationproperty,nonlinearityofconstitutiverelationshipandcatastropheoffailureprocess.basedonthetotalpotentialenergyprinciple,thecuspcatastrophicmodelforinstabilityandfailureofdeep-buriedtunnelsurroundingrockisestablished.throughtheobserveddataofsettlementvaluesoftypicalsectionvaultofdeep-buriedtunnelandthesuddenthresholdvaluesofdisplacementofeachmonitoringsection,thevariablevaluesofvaultsettlementfunctionareobtained,andthestabilityofdeepsurroundingrockintunnelisdecided.theresultaccordswithsurroundingrockofpracticalconstruction,itnotonlyoffersreferencesforpreventinginstabilityandfailureofdeep-buriedtunnels,butalsogivesanimportantguidanceforreasonableconstructiontechniqueofsupportingmeasures.
%K tunnelsurroundingrock
%K catastrophetheory
%K model
%K instability
%K vaultsettlement
%U http://ytlx.whrsm.ac.cn/CN/abstract/abstract9597.shtml