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1、斜切式洞门施工工艺一工艺概述斜切洞门一般包括二次衬砌模板、钢筋、拱墙仰拱及填充混凝土。适用于客运专线隧道洞口工程斜切式洞门施工。二作业内容1二次衬砌模板;2衬砌钢筋;3拱墙仰拱;4填充混凝土。三施工准备1熟悉施工图纸,编制作业指导书,做好各项技术交底,;组织技术培训、考核。2做好现场劳动力组织,各种施工机械满足施工要求。3施工所需各项材料进场,满足施工要求。4人工清表,机械平整场地。5加快征地拆迁进度,修建施工便道,修建各种临建工程同时减少对周围环境的影响。四工艺及质量控制流程工艺及质量控制流程见图1。五工艺步序说明1仰拱、仰拱填充施工施工前于隧道边墙每隔5米施放测量控制点,作为仰拱开挖
2、及混凝土施工控制点。为不影响机械车辆通行,仰拱、仰拱填充利用栈桥平台进行混凝土施工。混凝土在洞外采用拌和站集中拌和,混凝土搅拌运输车运至洞内进行浇筑。仰拱、仰拱填充施工注意事项:1)仰拱应及时施作,与开挖面的距离不宜超过衬砌浇筑段长度的3倍。黄土隧道与开挖面的距离不得超过30m,同时仰拱一次开挖长度不宜超过6m。2)施工前必须清除隧底虚碴、淤泥和杂物,超挖部分应采用同级混凝土回填。3)仰拱砼应整体浇注一次成型,填充砼应在仰拱砼终凝后浇注,填充砼强度达到5Mpa后允许行人通过,达到设计强度的100%后允许车辆通行。pipeandthemetalstructureinstallationpa
3、rtmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstruct
4、ureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandel
5、ectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22
6、hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trashrack,door(gate...Pressurepipeandthemetalstructureinstallation9.1mainengineeringprofileyongxingriverlevelhydr
7、opowerstationpressurepipepipelineplaneShangalongRidgeislinelayout,andslopesurfacecontourclosevertical,GuanPowithoriginalgroundlinechanges,usedopentypeMingtube,singletubejointwaterway,competentdiameter1.3M,long931.00m,t