隧道施工项目六支护施工13课件.pptx

Tunnelconstruction

隧道施工

项目六支护施工Project6Supportconstruction任务三超前支护Task3AdvanceSupport——管棚施工Pipeshedconstruction

学习目标Learningobjectives2知识目标Knowledgeobjectives能力目标Competencyobjectives通过本任务的学习，学生应了解不同类型管棚的施工工艺流程;掌握管棚施工质量控制要点。Throughthestudyofthistask,studentsshouldunderstandtheconstructionprocessofdifferenttypesofpipesheds;Masterthekeypointsofqualitycontrolofpipeshedconstruction.通过本任务的学习，学生应能够具备组织管棚施工和实施管棚质量控制的能力。Throughthestudyofthistask,studentsshouldbeabletoorganizetheconstructionofthepipeshedandimplementthequalitycontrolofthepipeshed.

管棚的概念Theconceptofapipeshed利用钢拱架，沿着开挖轮廓线以较小的外插角，向开挖面前方打入钢管，构成棚架，形成对开挖面前方的预支护。Usingthesteelarchframe,alongtheexcavationcontourlinewithasmallerinsertionangle,thesteelpipeispunchedintothefrontoftheexcavation,formingatrellis,formingapre-supportforthefrontoftheexcavation.钢拱架——环向支撑Steelarch–ringsupport钢管——纵向支撑Steelpipe–longitudinalsupport

管棚施工工艺流程Pipeshedconstructionprocess开挖作业平台Excavationworkplatform

测量放样Measurelofting

施做导向墙、安导向管Makeaguidewallandananchorpipe钻孔drill

安装管棚钢管Installpipeshedsteelpipes注浆Grouting

钢管制作Steelpipeproduction注浆泵Groutingpump

进洞开挖、支护Diggingandsupportingthehole

施工工艺流程Constructionprocess首先，在开挖轮廓线以外施作混凝土套拱作为长管棚导向墙。First,concretearcheswereappliedoutsidetheexcavationcontourlineasaguidingwallforthelongpipeshed.浇注前，应在套拱内按设计仰角安设孔口管起导向、固定作用。Beforepouring,theorificepipeshouldbeinstalledinthesheatharchaccordingtothedesignelevationangletoplayaguidingandfixingrole.孔口管的直径应大于长管棚直径。导向管由定位筋焊接固定在钢拱架上。Thediameteroftheorificepipeshouldbegreaterthanthediameterofthelongpipeshed.Theguidepipeisweldedbyalocatorribandfixedtothesteelarchframe.

施工工艺流程Constructionprocess(2)钻机就位Therigisinplace钻机就位处的土层应进行夯实，确保在钻进过程中，钻机不发生倾斜或滑动。Thesoillayerwheretherigislocatedshouldbecompactedtoensurethattherigdoesnottilt