水岩分算隧道衬砌外水压力折减系数取值方法-刘立鹏

TU451A10004548(2013)03049506(1983)E-mail:[e-mail]ctionfactorofwaterpressureactingontunnelliningsusingwater-rockindependentcalculationmethodologyLIULi-peng,WANGXiao-gang,JIAZhi-xin,DUANQing-wei,WANGYu-jie(DepartmentofGeotechnicalEngineering,ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing100048,China)Abstract:Inordertoaccuratelydeterminethereductionfactorofwaterpressureactingontunnellinings,amethodtodeterminethewaterloadactingonthecompositeliningsandthewaterdischargeinthetunnelisderivedbasedonthecorrelationtheoryofgroundwaterhydraulicsfromthegroundwaterseepageactionbymeansofthegroundwatertreatmentregulationsinthetunnelcodesandtheempiricalmethods.Theinfluencesofvariableparametersofprimarysupport,secondarysupportandgroutingcircleonwaterinflowandreductionfactorofexternalwaterpressurearereleasedbyusingthetheoreticalanalysis.Theproblemswhichshouldbepaidattentiontoandthemethodstodeterminethevalueofreductionfactorofwaterpressureactingondifferentkindsoftunnelliningsarestudied.Theresultsmayprovidereferencesforthedesignoftunnelwaterproofinganddrainagesysteminhighwaterpressureregions.Keywords:tunnelingengineering;lining;reductionfactorofwaterpressure[1][2-3]e[4-6]SL2792002[7][3,8]3[2]e0.150.9e=19732011CB01350251179210102720120507496201360m[9-10][11-13][14]П.У.Пοинматкин[2]0ini201iniLr0rinilnlnlnrPrPrkrrkr(1)P1P2kLkrr0inirrr1eini01einiLr20rinilnlnlnrrPrkrPrkr(2)inir=5.5mr0=5mH=5002510050me1kr/kLekr/kLkr/kLβeFig.1Variationofβewithdifferentkr/kL2kL=0e=1[15][16]2[15]Fig.2Evolutionofwaterpressurewithdifferenttime[15]233.497[16]Fig.3Relationshipbetweenwaterpressureanddifferentpermeabilities[16]βe4SL2792002L2e0L2gL2rL2L2L1L2rggL1L1L20L2L1L2eL1L20L1gL2rL2L2L1L2rggL1L1L20gL2L2L1L2egL1L1L20gL2rrlnlnlnlnlnlnlnlnlnlnlnlnlnlnlnrPrPrkrkkrrkrkrkrrkrrPkrrPrkrkkrrkrkrkrrrkkrrPkrkrrPkrkgL2L2L1L2ggL1L1L20lnlnlnrkkrrrkrkrr(3)L2egL2rL2L2L1L2rggL1L1L202πlnlnlnlnkHQrkrkkrrkrkrkrr(4)krkkL1kL2rrrgrL1rL2r0PeHeHe[2]PL1PL2PgL20L2gL2rL2L2L1L2rggL1L1L20L2L1L2L1L20L1gL2rL2L2L1L2rggL1L1L20gL2L2L1L2gL1L1L20ggL2rL2L2rggL1lnlnlnlnlnlnlnlnlnlnlnlnlnlnlnlnrrrkrkkrrkrkrkrrkrrkrrrkrkkrrkrkrkrrrkkrrkrkrrrkrkkkrkrkL1L2L1L20lnlnrrrr(5)L1L2gr0=5.0mrL2=5.5mrL1=6.0mrg=12m100mrr=He=100m1kr=5.0×106m/skL1=1.0×108m/skL2=1.0×109m/snrg=kr/kg4449820131Fig.4Variationofreductionfactoranddischargewithdifferentpermeabilitiesofgrouting2kg5.0×108m/snrL15Fig.5Variationofreductionfactoranddischargewithdifferentpermeabilitiesofprimarylining53kg=5.0×108m/skL1=1.0×108m/snrL2664Fig.6Variationofreductionfactoranddischargewithdifferentpermeabilitiesofsecondarylining1kg=5.0×109m/s7Fig.7Variationofreductionfactoranddischargewithdifferentthicknessesofgrouting7nrgnrL2883.499Fig.8Relationshipbetweenexternalwaterpressureanddischarge670.5m3/(d·m)0.2MPanrg5001000nrL21000200012SL2792002881243455002013[1].[J].,2006,25(8):15131521.(SUNJun.Discussiononsomekeytechnicalissuesfordesignandconstructionofunderseatunnels[J].ChineseJournalofRockMechanicsandEngineering,2006,25(8):15131521.(inChinese))[2].[J].,1996,22(12):3034.(ZHANGYou-tian.Correctionfactorofexternalwaterpressureindesignoftunnelandpenstock[J].WaterPower,1996,22(12):3034.(inChinese))[3],,.[J].,2002,21(9):13391343.(WANGJian-xiu,YANGLi-zhong,HEJing.Introductionofthecalculationofexternalwaterpressureoftunnellining[J].ChineseJournalofRockMechanicsandEngineering,2003,21(9):13391343.(inChinese))[4]TB100032005[S].:,2005.(TB100032005Codefordesignontunnelofrailway[S].Beijing:ChinaRailwayPublishingHouse,2005.(inChinese))[5]JTGD702004[S].:,2004.(JTGD702004Codefordesignofroadtunnel[S].Beijing:ChinaCommunicationsPress,2004.(inChinese))[6]GB501572003[S].:,2003.(GB501572003Codefordesignofmetro[S].Beijing:ChinaPlanningPress,2003.(inChinese))[7]TB100032005[S].:,2005.(TB100032005Codefordesignontunnelofrailway[S].Beijing:ChinaRailwayPublishingHouse,2005.(inChinese))[8].[J].,2003,40(3):59.(WANGJian-yu.Oncemoreonhydraulicpressureuponlining[J].ModernTunnellingTechnology,2003,40(3):59.(inChinese))[9],.[J].,2005,22(4):14.(WANGMeng-shu,HUANGFuMing.Keyproblemsonsubseatunnelconstruction[J].JournalofArchitectureandCivilEngineering,2005,22(4):14.(inChinese))[10],,.[J].,2005,24(10):17281734.(LIUZhao-wei,ZHANGDing-li,ZHANGMin-qing.Groutingtechniqueforhigh-pressureandwater-enrichedareainMaobasynclineatYuanliangshantunnel[J].ChineseJournalofRockMechanicsandEngineering,2005,24(10):17281734.(inChinese))[11],,.[J].,2004,28(1):810.(WANGXiu-li,WANGMeng-shu,ZHANGMi.Asimplemechodtocalculatetunneldischargeandexternalwaterpressureonlining[J].JournalofNorthernJiaotongUniversity,2004,28(1):810.(inChinese))[12],,.[J].,2005,27(1):125127.(WANGXiu-li,WANGMeng-shu,ZHANGMi.Researchonregulatingwaterpressureactingonmountaintunnelsbyblockinggroundwaterandlimitingdischarge[J].ChineseJournalofGeotechnicalEngineering,2005,27(1):125127.(inChinese))[13],,,.[J].,2008(5):5358.(ZHANGMin-qing,HUANGHong-jian,MIAODe-hai,etal.Studyonanddeterminationofwaterpre