Volume 30 Issue 5
May  2014
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ZHONG Dong-wang, WU Liang, YU Gang. Effectoftunnelingblastingonanexistingadjacenttunnel[J]. Explosion And Shock Waves, 2010, 30(5): 456-462. doi: 10.11883/1001-1455(2010)05-0456-07
Citation: ZHONG Dong-wang, WU Liang, YU Gang. Effectoftunnelingblastingonanexistingadjacenttunnel[J]. Explosion And Shock Waves, 2010, 30(5): 456-462. doi: 10.11883/1001-1455(2010)05-0456-07

Effectoftunnelingblastingonanexistingadjacenttunnel

doi: 10.11883/1001-1455(2010)05-0456-07
Funds:

NationalNaturalScienceFoundationofChina(50774056,51004079)

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  • Corresponding author: ZHONG Dong-wang
  • Publish Date: 2010-09-25
  • Basedonanactualtunnelexcavationproject,thethree-dimensionalfiniteelementmodelof tunnelexcavationwassetup,andtheparticlevibrationandstressdistributionwereanalyzedatthe existingadjacenttunnelconcretelining.Thecalculationresultshowsthatinthewholerangeofinvestigation, theverticalpeakparticlevibrationisbiggerthanthoseintheothertwodirections,butthe maintensilestressinthetunnelvaultcrownandbottomisinthehorizontaldirection,whichproves thattheverticalpeakparticlevibrationcannottotallyrepresentthestressstateofrock.Inactualprojects, theblastingpeakparticlevibrationshouldbecontrolled,andthestressstateofrockshouldbe analyzedaswell.Themaximumpeakparticlevibrationcalculatedis4.94cm/s,whichissmallerthan 5.00cm/srequiredinprojects;themaximumtensilestressinthetunnelvaultcrownis0.54MPa,so thetunnelconcretelineisnotaffected.
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