毕业论文外文翻译--TBM在不良地质条件下的隧道掘进

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1、TBMTUNNELLINGINDIFFICULTGROUNDCONDITIONTBM在不良地质条件下的隧道掘进GiovanniBarlaandSebastianoPelizzaABSTRACT摘要ThispaperistodiscussTBMtunnelingindifficultgroundconditions,whenproblemsaremetwhichmayreducedramaticallytheaverageprogressratesandpracticalconsequencesmaybesuchas

2、toposeseriousquestionsontheuseofmechanizedTBMtunnellingversusdrillblastandotherso-calledtraditionalexcavationmethods.FollowingafewremarksonrockTBMtunnellinginrelationtotheselectionanddimensioningofthemachine,theattentionisposedonthelimitinggeologicalconditions

3、whichmaybeenvisagedwithrespecttotheuseofTBMtunnellingandontheimportanceofgeologicalandgeotechnicalinvestigations,inordertoderiveanappropriateunderstandingoftherockmassconditionsalongthelineofthetunnel.Thediscussioniscenteredupontherelativelymoreimportantordiff

4、icultgroundconditionsincludingborabilitylimits,instabilityofexcavationwalls,instabilityofexcavationface,faultzonesandsqueezing.Wheneveravailabletotheauthorsandbasedonprojectexperience,thepointofviewisillustratedbycaseexamples,whichgivetheopportunitytounderline

5、specificdifficultiesencounteredandrecommendations.本篇论文所探讨的内容是：在遇到严重减小掘进速度的不良地质条件下的隧道开挖，并提出采用ＴＢＭ，钻爆法和其他所谓的传统开挖方法进行隧道掘进时所能遇到的问题。下面是由ＴＢＭ进行掘进的有关机器选型和尺寸的说明，关注于使用ＴＢＭ进行掘进的地质条件的限制及地质和地质观测的重要性，所以，要恰当理解隧道沿线的围岩状况。讨论集中于相对重要或不良地质状况的围岩，其中包括可挖性限制，开挖洞壁的不稳定性，开挖掌子面的不稳定性，断层和挤压岩况

6、。利用其他作者之言并基于工程经验，通过实例阐述观点，借此机会强调面临的特殊困难并给出建议。INTRODUCTION引言TBMexcavationrepresentabiginvestmentinanunflexiblebutpotentiallyveryfastmethodofexcavatingandsupportingarocktunnel(Barton,1996).Whenunfavorableconditionsareencounteredwithoutwarning,timescheduleandprac

7、ticalconsequencesareoftenfargreaterinaTBMdriventunnelthaninadrillandblasttunnel.TBM开挖不仅意味着巨额投资，而且可以进行快速开挖和支护(Barton,1996)．在无预警的情况下遇到不良地质条件，从时间和实际产生的结果来讲采用TBM方法进行隧道掘进远远比采用钻爆法快得多。Theunfavorableconditionscanbeproducedbyeitherarockmassofverypoorqualitycausinginsta

8、bilityofthetunnelorarockmassofveryquality(i.e.strongandmassiverockmass)determiningverylowpenetrationrates.However,itistobeobservedthatwhenusingthefullfacemechanizedexcavationmethod