AboutOnthetunnelofahighwayreconstructionprojectintheworkspointsAbstract:Introductionofahighwayreconstructionprojectfulltunnelexcavationandsupport,waterproofinganddrainage,secondarylining,forecastingandmonitoringofgeologicalaspectsofmeasurementtechnologytosolvegeologicalforecasting,smoothblasting,nodripwaterinfiltration,thesecondliningandmanyothertechnicalproblems.Keywords:highwaytunnel,constructiontechnology,aheadofforecast1ProjectOverview1.1Project-scaleprojectsStakeK15+900~K23+800,totallength7.9km.Thetunnelprojectare:earthexcavationMyeongdong11906m3,rockexcavationholebody103046m3,Myeongdonglining1644m3,5402m3initialsupportsprayedconcrete,secondaryliningconcretemodelbuilding13892m3,groutingsmallpipe20440m,piperoof3690m,mortaranchor100215m,insidesurface2496m3.Shankengtunnel405m/semi-Block,smallyellowmouthofthetunnel795metersoperation/seat.11.2Kingofengineeringgeologicalconditionsoftheprojectislocatedinthesouthentrancetothevillagesettlementbasin,themainstructuralsystemcontrolledbythenewChina,magmaticactivityandmoredevelopedfaults,foldsarenotdeveloped,mainlysincetheMesozoicbrittledeformation,andtectonicmovementhasexperiencedmore,culminatinginaseriesofnortheast,followedbynearlynorth-south,northandnortheasttothewestofthefracture.Accordingto<<Chinaearthquakegroundmotionparameterzoningmap>>divisionlineofthepeakaccelerationofgroundmotionbytheregionalfactorislessthan0.05g.Groundmotionresponsespectrumcharacteristicperiodoflessthan0.35s,equivalenttothebasicseismicintensityislessthanⅥdegree,theprojecttunnelbyⅥminimumsecurity.ConstructionTechnology2Accordingtotheengineeringcharacteristicsofthetunnel,accordingtothe‘NewAustrianTunnelingMethod,’theprincipleof2construction,generalconstructionsequence:constructionsurveyandsettingouttoprepare---holedongwaterproofinganddrainageconstructionexcavationaheadofpiperoofconstructionprotective---holeboringholebodysupportingbody-secondarylininginsidesurfacelevelinglayer---roadsurfaceinsidethecaveDitchProject-Portal-walltiles,archinteriorpainting,electricalinstallation-finalacceptance.2.1holemechanizedearthworkconstructionoperations,themainrockblastingmethodwithlightbursteyelevel,andthebottomslopeloosewithasmallcannonblasttoprotecttheflooranddamagedslope,slopeangleaccordingtothedesignconstruction,setasidetheprotectivelayerthicknessof1.5~2m,pullinMyeong-dongwiththeroadbedoftheformertankexcavationofdrainageworkwellinadvance,pre-finishedholeringditches.2.2holetunneling-sitemonitoringbodymeasurementprincipleofthenewAustriantunnelingmethodindispensablemeansforthedesignand3construction,theconstructionaccordingtodesignrequirementstoenhancethemeasurementandtimelyfeedbacktocorrectdesignandconstruction.①Ⅴgraderock.Ⅴgradepoorrockconditions,aheadofthefirsttoadvanceasmalltubeorpiperoofconstruction,excavationoflandusedivisiontoremainthecoreexcavationmethodofconstruction.Excavationusingblastingandtheuseofweakpre-splitblasting,strictcontrolthequantitiesofexplosives.constructiontofollowpipeahead,weakburst,Yangrouting,shortexcavation,shoringstrong,earlyclosure,groundmeasurementprinciple.Thefirstconstructionofpiperoofadvancesupport,andthenre-excavationoftheupperringdepartment,afterinitiallysupportingtheupperpartofthecoresoilexcavation,andfinallytothelowerpartofexcavationandsupport.Initiallysupportingtheuseofanchors,spray,nets,beamjointsupportstructureandeachPi...