大断面深埋黄土隧道锚杆支护作用研究

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1、北京交通大学硕士学位论文大断面深埋黄土隧道锚杆支护作用研究姓名：唐培连申请学位级别：硕士专业：桥梁与隧道工程指导教师：谭忠盛20080601悲索交通大学硕士学馒论交ABS’l取ACTABSTRACTAbstract：Ithasbeenafocusofdebateforalongtimehowthesystemboltsactintheloesstunnel．Atpresenttherearetwoviewpoints,oneviewisthattheboltsinthearchoftheloesstunneldon'thaveeffectontheLo

2、essstabilityofthetunnel，SOtheboltsneednotsetintheanchor；Anotherviewisthatitshouldsetboltsintheanchor,becausetheboltsplayakeyroleintheanchorstabilityoftheloesstunnel．TKssituationnotonlybringsgreatdifficultiestotheLoesstunneldesign,butalsocausestheconstructionsupportoftheLoessTunn

3、elconfused．AssociatingwiththelargesectionloesstunnelofthebuildingZhengzhou-Xi’anhi曲-speedpassengerraillines,wehavedonemanyinsitecontrasttestingtoevaluatetheeffectofsystembolt．Forthegoodcomparabilityofthetestingresult，we’dchoosethetunnelwhichhasthesimilartestcondition．Inthiscase，

4、wetaketheHanguguanTunnelasourexperimentalsectioninwhichwesetsystemboltsectionfor45metersandnon-systemboltsectionfor42meters．霹站maincontrastexperiencesalethesettlementofthetunnelcrownandarch如咄horizontalconvergence,surroundingrockpressure，thestressofinitialsupportingsteelframework，

5、axialforceofbolt，etc．Thetestingresultindicate：孙tllthetwosectionshasalmostthesamesettlementinthetunnelcrownandthesectionwithsystemboltsectionhasalittlemorehorizontalconvergencethantheonewithoutsystembolt；therearelittledifferenceinthesoilpressureandsteelframeworkstressbetweenthetw

6、osections；thereislessaxialforceinthebolt．Throughcomprehensiveanalysis,wemaketheconclusionthatthereislittleimprovementofsupportingeffectinthecrownbolt，SOwesuggestcancelingthebolttoinducetheconstructionprocedureandquickentheenclosedoftheinitialsupportingsectionofthetunnel．Itwillbe

7、helpfultocontrolthesupportingsettlementanddeformationanditalsoreducestheinvestmentandcost．Keywords：tunnelinloess；deepdepthtunnel；systembolt；bolteffect；testClassicno：学位论文版权使用授权书本学位论文作者完全了解北京交通大学有关保留、使用学位论文的规定。特授权北京交通大学可以将学位论文的全部或部分内容编入有关数据库进行检索，并采用影印、缩印或扫描等复制手段保存、汇编以供查阅和借阅。同意学校向晷

8、家有关部门或机构送交论文的复印件和磁盘。(保密的学位论文在解密后适用本授权说明)学位论文作者签