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1、老木岩隧道工程技术交底工程项目川黔铁路土建9标合同号单位工程名称老木岩隧道施工单位中建四局渝黔铁路土建9标项目部里程DK276+509.92交底日期2015年6月17日部位开挖交底内容：三台阶七步开挖法施工安全、技术交底一、工程概况本项目施工老木岩隧道全长398.8m，开挖方式:三台阶七步法，起止里程为DK276+900—DK277+298.835。二、施工所依据的施工规范和验收标准《铁路隧道工程施工质量验收标准》《铁路隧道施工规范》《铁路技术管理规程》《铁路工程测量规范》《客货共线铁路隧道工程施工技术指南》《老木岩隧道设计图》三、施工方法隧道三台阶七步开挖法(以下简称“三台阶七步开挖法
2、”)是以弧形导坑开挖留核心土为基本模式，分上、中、下三个台阶七个开挖面，各部位的开挖与支护沿隧道纵向错开、平行推进的隧道施工方法。四、工艺流程施工操作流程:l上部弧形导坑环向开挖，施做拱部初期支护；2、下台阶左右错开开挖，施做墙部初期支护：3中心预留核心土开挖、隧底开挖，施做隧底初期支护。每部开挖后均应及时支护，隧底初期支护后应及时施做仰拱，尽早封闭成环。五、主要的施工工序及技术要求1、施工流程图attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthe
3、people'slivelihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyinabetterandfaster,createanewnormalXXdevelopmentandlayamoresolidfoundationforXXbuildawell-offsociety.Completedtasksthisyear,wemustalwayspayspecialattentiontotheprimarytaskofdevelopment.XXwe
4、akeconomicbase,lowlevelsofdevelopment,economicconstructionistheCenter,wehavetocreateconditionsforfastereconomicdevelopment,accumulatingmorewealth,betterpeople'slives.Effortshouldbemadetothisyear'seconomicgrowth,revenuegrowth,peoplehavemaintainedahighrateofincomegrowth,GDPgrowthofmorethan15percent
5、respectively.Alwaysgraspthefundamentalimpetusforreform.Wearenow"nosoldiersbehind"manyindicatorsrankedinthebottomofthecountyfromgettingbigger.Onlybygoingallouttohardwork,hardwork,innovation,reformdoesnotadapttoinstitutionalmechanisms,practices,itispossibletochangethefaceofXXpoor,intoawell-offsocie
6、tytogetherwithpeopleacrossthecountry.Wewanttobreaktheoldpatternsofthinking,methodsandorganizationofwork,bravelyandboldlyinto,makingfulluseofalltheadvantages,comprehensivereforms,tomakeallitsvitalityfordevelopmentimpulse,letfullplaytoallsourcesofwealthcreation.Shouldalwaysstability三台阶七步开挖法施工工艺流程图2
7、、三台阶开挖法施工工序attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthepeople'slivelihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyin
