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1、安全交底交底单位项目部安质部抄送单位工程名称日期一般规定1、隧道施工的各班组间，应建立完善的交接班制度并将施工安全等情况记载于交接班的记录薄内。工地负责人应认真检查交接班记情况。2、进洞前应先做好洞口工程，稳定好洞口的边坡和仰坡，做好天沟、边沟等排水设施，确保地表水不致危机隧道的施工安全。3、所有进洞的人员，必须按规定佩带安全防护用品，遵章守纪，听从指挥。4、遇有不良地质地段施工时，应按先治水、短开挖、弱爆破、先护顶、强支护、早衬砌的原则稳步推进。二、开挖、凿孔及爆破1、开挖人员到达工作地点时，应首先检查工作面是否处于安全状态，并检查支护是否牢固，顶板
2、和两帮是否稳定，如有松动的石、土块或裂缝应先予以清除或支护。2、机械凿岩时，宜采用湿式凿岩机或带有捕尘器的凿岩机。3、风钻钻眼时，应先检查机身、螺栓、卡套、弹簧和支架是否正常完好，管子接头是否牢固，有无漏风；钻杆有无不值，带伤以及钻杆堵塞现象；湿式凿岩机的供水是否正常；干式凿岩机的捕尘设施是否良好。不符合要求者应予修理或更换。meettheconstructiondrawingsprovidedstrengthandworkabilityofconstructionrequirements,mixingratiomustbedeterminedbyte
3、st.Constructionwhenyouneedtochangethemixofcementitiousmaterial,retesting,andsubmittedtothesupervisorforapproval.(2)mixingofcementitiousmaterials,shouldbecarriedoutstrictlyaccordingtothetesttodeterminetheingredientsofingredients,notampering,ingredientweighingerrorsshouldbeallowed
4、subjecttothefollowing:cement±2%;sand,gravelis±3%,water,additives±1%.(3)thecementitiousmaterialinthemixingprocessshouldremainofcoarseandfineaggregatewaterstability,accordingtochangesinmoisturecontentofaggregateandadjustwatertoensuretheaccuracyofthewater/cementratio.(4)mixingtimeo
5、fcementitiousmaterials:mechanicalmixingofnotlessthan2~3min,notartificialmix.Localsmallartificialmixtureofdrymixatleastthreetimes,thenwet-mixtouniformcolor,canbeused.(5)withcementitiousmaterialsshouldbemixed.Cementitiousmaterialsallowedintervalshouldbedeterminedthroughexperiments
6、,orrefertothetableselected.Segregationduringtransportandstorage,watermortarandmasonrybeforemixingagain,initialsettingofcementitiousmaterialsshallnotbeused.Cementitiousmaterialsallowbreakswhenlayingtemperature(℃)allowedinterval(min),ordinaryPortlandcementandslagPortlandcement20~~
7、~10195/8.4.5andpozzolanacementmasonrymasonrywithPucastingmethod,theprocessis:masonrypreparation–materialselection→putspulpplacedstone→...8.58.5.1masonrymortarforconstructionofmasonrysandinthesand,andsiftthesandshallnotincludegrass-rootsandotherdebris.Sandclaydoesnotexceed5%.Mixi
8、ngofmortar350Lmortarmixer.Mixingtime,finishedfe
