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1、第35卷增刊(I)东南大学学报(自然科学版)Vol.35Sup(I)2005年7月JOURNALOFSOUTHEASTUNIVERSITY(NaturalScienceEdition)July2005可考虑任意围岩压力分布形式的隧道衬砌计算分析112周爱红张鸿儒袁颖1（北京交通大学土木建筑工程学院,北京100044）2（大连理工大学土木水利学院,大连116024）摘要:以大型通用软件ANSYS为平台,采用静力等效原则,把压力转化为相应的节点荷载,解决了隧道围岩压力与节点位置相关又不与衬砌结构垂直的输入问题
2、.利用ANSYS的参数化高级设计语言,编制了适合任意三心圆拱衬砌断面和不同围岩压力分布形式的隧道衬砌内力和偏心距的通用计算程序.这为隧道设计提供了很大的方便.以武广客运专线双线浅埋隧道为例进行了计算分析.结果表明:对于埋深较浅的隧道,如果拱顶围岩压力按均布进行计算,结果会产生较大误差.围岩压力仅按均布设计的隧道,拱腰易出现开裂;围岩压力仅按马鞍型设计的隧道,拱顶易出现开裂;最好采用多种围岩分布形式进行隧道设计与验算.关键词:三心圆拱;隧道衬砌;围岩压力;荷载分布中图分类号:U459.2文献标识码:A文章编
3、号:1001-0505(2005)增刊(I)-0095-05Calculationanalysisoftunnelliningconsideringarbitrarysurroundingrockpressuredistribution112ZhouAihongZhangHongruYuanYing1(SchoolofCivilEngineeringandArchitecture,BeijingJiaotongUniversity,Beijing100044,China)2(SchoolofCivilan
4、dHydraulicEngineering,DalianUniversityofTechnology,Dalian116024,China)Abstract:Basedonthelarge-scaleuniversalsoftwareANSYS,theinputproblemthatsurroundingrockpressuresoftunnelareassociatedwithnodelocationbutnotperpendiculartotheliningwassolvedusingstaticeq
5、uivalentprincipletotransformthepressuresintocorrespondingnodalloads.AgeneralprogramusingAPDL(ANSYSparametricdesignlanguage),whichisapplicabletoarbitraryliningsectionsofthethree-centeredcirculararchwithdifferentsurroundingrockpressuredistributions,wasdevel
6、opedforthecalculationofthetunnelinnerforcesandeccentricities.Theworkprovidesgreatconveniencetothetunneldesign.AnillustrativeexampleoftheshallowembeddedtunnelofWu-Guangspecialpassengertransportdoublelineisgiventodemonstratetheusageoftheproposedprocedure.Th
7、eresultsshowthat,forrelativelyshallowembeddedtunnel,abigerrorwouldoccurifthesurroundingrockpressureofthevaultisregardedasuniformlydistributed.Whenthetunnelisdesignedsolelyaccordingtouniformlydistributedsurroundingrockpressure,itshancewillbepronetofracture
8、andwhenthetunnelisdesignedsolelyaccordingtoU-shapedsurroundingrockpressure,itsvaultwillbeeasytocrack.Soitisbettertoadoptseveraldifferentkindsofdistributionofsurroundingrockpressureindesigningtunnelandcheckingcomputa
