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Studyonclassificationofsurroundingrocksuitablefor
TBM constructionofhydraulictunnel
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WANGYujie,LIXiuwen,CAORuilang,XUZhenhao,CHENBingrui,ZHANGXiaoping
(1.ChinaStateKeyLaboratoryofSimulationandRegulationofWaterCycleinRiverBasin,
ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100048,China;
2.GeotechnicalandStructuralEngineeringResearchCenter,ShandongUniversity,Jinan 250061,China;
3.StateKeyLaboratoryofGeomechanicsandGeotechnicalEngineering,InstituteofRockandSoilMechanics,
ChineseAcademyofSciences,Wuhan 430071,China;
4.StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience,WuhanUniversity,Wuhan 430072,China)
Abstract:TBM hasgraduallybecomeaconventionalconstructionmethodforhydraulicdeepburiedlongtunnels.
However,theexistingspecificationsforsurroundingrockclassificationmainlytakethestabilityofsurroundingrock
andsupportmeasuresasthemaindiscriminantfactors ,whichisonlysuitablefordrillingandblastingtunnels.
Therefore ,theclassificationindexsystemofsurroundingrockandthecharacteristicsofTBMconstructionfordiffer
entprojectsathomeandabroadarecombed.Then ,theTBMtunnelingefficiencyandadversegeologicalconditions
areemphaticallyanalyzed ,andtheclassificationmethodofsurroundingrocksuitableforTBM constructioniscon
structedbasedonthebasicclassificationoftunnelsurroundingrock.Finally ,alargenumberofengineeringcases
aresummarized ,andthequantitativeimpactofsixkeyfactorsonTBM construction,namely,superhardrock,
rockburst,faultfracturezone,largedeformation,waterinrush(mudinrush)andhighexternalwaterpressure,
iscomprehensively weighed, and the quantifiable surrounding rock classification index is proposed.The
engineeringapplicationshowsthatthesurroundingrockclassificationmethodforTBM constructionsuitabilitycan
quicklycompletethesurroundingrock classification accordingtotheengineeringgeologicaldata , and can
effectivelyguidetheTBM tunnelconstruction ,thathasgooduniversalityandeaseofuse.
Keywords:TBM;constructionsuitability;classificationofsurroundingrock;superhardrock;faultfracturezone;
surgewater;largedeformation
(责任编辑:李 娜)
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