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1、Safety management in tunnel construction: Case study of Wuhan metro construction in ChinaAuthor： MiroslawJ. Skibniewski Lieyun Ding, et alReporter: Wu Tong-gangCentral South UniversityNew wordsShaft:通风井Grouting:灌浆，给灌浆High-pressurejetgroutingpiles(HJGP):高压喷射灌浆柱Siltyclay:粉质黏土Tunnelboringmachine(TBM):隧
2、道掘进机Gush:涌出Double-spool:双轴OutlinePART 1 Introduction PART 2 MethodPART 3 ResultsPART 4 ConclusionIntroduction 11.1 Background Shield tunneling technologyAdvantages Disadvantages 1. High level of mechanization1. Large scale 2. Fast progression of tunneling works2. Long duration3. Lesser environmental
3、 impact3. Complex technical issues1.2 Objective The primary aims of this study were to investigate:Overall Process Safety Management (OPSM) in tunnel construction.iiiiA real-time update of both environmental parameters and control measures.iiA more reasonable solution for the waterproofing and reinf
4、orcing works.1.3 Project profileWuhan Yangtze Metro Tunnel (WYMT)Characteristics:1. Double-spool tunnel connecting two large cities2. Two sets of ventilation shafts3. A curve radius of 350m and an extremely close distance away from Yangtze River4. Fine sandstone and silty clayMethod 2Waterproofing G
5、round freezingLowering of water level methodReinforcing 1.Thecementpastetendstobewashedawaybytheflowingwater,resultinginpoorreinforcement.A high-pressure jet grouting2.1 Safety system design2.NosignificantwaterproofingresultswouldbeachievedduetothecloseproximitytotheYangtzeRiver.2.1 Safety system de
6、signGround heterog-eneityConstru-ction methodsSoil structure interact-ionNon-linear behavior of soils2.2 Safety analysisSystemicsafetyEconomicrequirementsNumericalsimulationANSYS2.3 Safety control process2.3.1ReinforcementcontrolItems Checking methodsChecking criteriaReinforced soil strengthDrill to
7、 obtain two cores on each side deep into the excavation bottom five miles away from the tunnel axis, and then conduct the core test. =1 Mpa Reinforced soil permeabilityDrill four holes well-distributed around the excavation region, and then test the permeability of each hole. =1 m3/d Reinforced soil
8、homogeneity Drill to obtain four cores well-distributed around the excavation region, and then test the homogeneity of each core. Uniformity 2.3 Safety control process2.3.2FreezingcontrolLayoutoffreezingholesWorkersareexaminingthefreezingeffect.2.3 Safety control process2.3.3UCWremovingcontrolWorker
9、sarecuttingdownthesteelwithinUCW.Workersarepastingquiltsontotheworkfaceofthetunnelportal.Results 33 Results 3 Results abca:Distributionofcompressivestressb:Distributionoftensilestressc:DistributionofshearstressConclusion4Conclusion1Treatschemesforwaterproofingandreinforcingworks2 BoringattitudecontrolofTBM3NumericalanalysesCombinefreezingmethodandHJGPIncludethepreliminaryIncludethepreliminarydeviationaheadofthedeviationaheadofthedrillingprocessdrillingprocessApplynumericalsimulationbyANSYSQuestion-inviting5LOGO HERETHANKYOU!PRESENTEDBYWuTong-gang
