隧道施工ItemTunnelstructures课件.pptx

Tunnelconstruction

隧道施工

项目一隧道结构物Item1Tunnelstructures任务二主体建筑物——洞身衬砌Task2Mainbuilding--Holebodylining

学习目标

Learningobjectives2知识目标通过本任务的学习，学生熟悉隧道衬砌类型；掌握隧道衬砌构造尺寸。KnowledgeobjectivesThroughthestudyofthistask,studentsarefamiliarwiththetypeoftunnellining;mastertunnelliningstructuresize.

学习目标

Learningobjectives3能力目标通过本任务的学习，学生能读懂复合式衬砌断面图，能用CAD绘制衬砌断面图；具有严谨的工作态度。AbilityobjectivesThroughthestudyofthistask,studentscanreadandunderstandthecompositeliningsectionanddrawtheliningsectionwithCAD.Haverigorousworkingattitude.

一、洞身衬砌类型

1.Theliningtypeoftheholebody1.复合式衬砌我国铁路隧道普遍采用2.锚喷衬砌Ⅰ、Ⅱ围岩短隧道3.整体式衬砌洞口段明洞采用1.CompoundliningRailwaytunnelsarewidelyusedinChina2.AnchorandshotcreteliningⅠ,Ⅱasurroundingrockshorttunnel3.IntegralliningTheopenholeoftheentrancesectionisused锚喷衬砌Anchorandshotcretelining复合式衬砌Compoundlining整体式衬砌Integrallining

二.复合式衬砌组成

Ⅱ.Compoundliningcomposition由初期支护和二次衬砌构成；在初期支护和二次衬砌之间铺设防水层Itiscomposedofinitialsupportandsecondarylining;Thewaterprooflayerislaidbetweentheinitialsupportandthesecondarylining

锚喷衬砌——短隧道

Shotcreteandanchorlining-shorttunnel

整体式衬砌——明洞

Integrallining–open-cuttunnel

三.衬砌构造

Ⅲ.Liningstructure1.衬砌组成拱部（拱圈）边墙底板或（仰拱）围岩较差需要做仰拱，使支护结构及早闭合，承担较大的围岩荷载。稳定围岩可以不做仰拱。1.LiningcompositionArch(archring)SidewallFlooror(invert)Invertisneededforpoorsurroundingrock,sothatthesupportingstructurecanbeclosedassoonaspossibleandbearlargesurroundingrockload.Stablesurroundingrockcanbedonewithoutinvert.边墙拱部仰拱

不带仰拱的衬砌

Liningwithoutinvert

三.衬砌构造

Ⅲ.Liningstructure2.衬砌构造尺寸拱部：找圆心O1，半径r1、圆心角140；边墙：找圆心O1，半径r1、圆心角38.40.18；仰拱：圆心O2、半径r2、圆心角55.00.472.LiningstructuraldimensionsArch:findcenterO1,radiusR1,centralAngle140;Sidewall:findcenterO1,radiusR1,centralAngle38.40.18;Invert:centerO2,radiusR2,centralAngle55.00.47

思政点：

Ideologicalandpoliticalobjectives:看图纸时候一定要注意尺寸线标注单位，差之毫厘谬以千里，要秉承认真负责的态度