隧道施工项目六支护施工99课件

Tunnelconstruction

隧道施工

项目六支护施工Project6Supportconstruction任务三超前支护Task3AdvanceSupport——管棚布置Pipeshedarrangement学习目标Learningobjectives2知识目标Knowledgeobjectives能力目标Competencyobjectives通过本任务的学习，学生应了解管棚的特点和分类；掌握洞口管棚的结构；能够结合施工图纸掌握管棚的布置。Throughthestudyofthistask,studentsshouldunderstandthecharacteristicsandclassificationofthepipeshed;Masterthestructureoftheholepipeshed;Beabletomasterthelayoutofthepipeshedincombinationwiththeconstructiondrawings.通过本任务的学习，学生应能初步读懂管棚的布置图；能完成管棚位置质量检查。Throughthestudyofthistask,studentsshouldbeabletopreliminarilyunderstandthelayoutofthepipeshed;Cancompletethequalityinspectionofthelocationofthepipeshed.一、管棚的概念Theconceptofapipeshed二、管棚构造Pipeshedconstruction⒈构造组成Constructcomposition管棚是利用钢拱架与沿开挖轮廓线，以较小的外插角、向开挖面前方打入钢管或钢插板构成的棚架来形成对开挖面前方围岩的预支护。Thepipeshedisatrelliscomposedofasteelarchandasmallerpluganglealongtheexcavationcontourline,andasteelpipeorsteelinsertplateispunchedintothefrontoftheexcavationtoformapre-supportprotectionforthesurroundingrockinfrontoftheexcavation二、管棚构造Pipeshedconstruction2.分类classify长度：小于10m的小钢管的称为短管棚；采用长度为10m~45m且较粗的钢管的称为长管棚；位置：洞口管棚和洞身管棚。Length:smallsteelpipeslessthan10marecalledshortpipesheds;Theuseofsteelpipeswithalengthof10mto45mandthickiscalledalongpipeshed;Location:Caveentrancepipeshedandcavebodypipeshed.洞口管棚Holemouthpipeshed洞身管棚Cavetubeshed二、管棚Tubeshed3.性能特点及适用条件Performancecharacteristicsandapplicableconditions特点：Peculiarity:其整体刚度加大，对围岩变形的限制能力较强，且能提前承受早期围岩压力。Itsoverallstiffnessisincreased,theabilitytolimitthedeformationofthesurroundingrockisstrong,anditcanwithstandthepressureoftheearlysurroundingrockinadvance.适用条件：Applicableconditions:适用于围岩压力来得快来得大，用于对围岩变形及地表下沉有较严格限制要求的软弱破碎围岩隧道工程中Itissuitableforthepressureofthesurroundingrocktocomequicklyandisusedintheweakcrushingsurroundingrocktunnelprojectwithstrictrestrictionsonthedeformationofthesurroundingrockandthesinkingofthesurface二、管棚Tubeshed4.洞口管棚施工参数Constructionparametersoftheholemouthpipeshed(1)参数parameter直径φ：Diameterφ:长度L：LengthL:环向间距：Ringspacing:方向：Direction:搭接：Lap:(20～80)cm(1°～2°)m(10～45)m(70～180)mm≥1.5m

纵向连接：Portraitconnection:丝扣连接Wirebuckleconnection二、管棚Tubeshed4.洞口管棚施工Constructionoftheholemouthpipeshed（2）洞口管棚导向墙构造尺寸Constructiondimensionsoftheguidingwalloftheopeningpipeshed二、管棚Tubeshed4.洞口管棚施工参数Constructionparametersof