成都地铁盾构隧道地表沉降分析

2010112(1.,621010,;2.,130021,,),,Peck,Peck:k0.130.31,;;;U455.43;TU433AnalysisonMetroGroundSettlementCausedbyShieldTunne2linginChengduCityLiBo,SuHuayou,ZhaoXuweiAbstractTheaffectionofgroundsettlementcausedbyshieldadvancementisanalyzedaccordingtothemeasuredsurfaceset2tlementdatafromasectionofmetroconstructioninChengduCity.ThePeckmethodparametersarecalculatedthroughthemeasureddata,andthePeckcurveisverifiedbytheconsistentextentofthesettlementpredictiontogetherwiththemeasuredvalues.Thisanalysisshowsthattherulesoftransversegroundsettlementcanbepreferablyreflectedwhenthevalueofkisbetween0.130.31,andtheresultcanalsoassisttheconstruc2tionofChengduMetro.Keywordsshieldtunneling;constructionparameters;groundsettlement;settlerFirst2authorsaddressEnvironmentandResourcesInstitu2te,SouthwestUniversityofScienceandTechnology,621010,Mianyang,China,[1],,,,,,,,,11,YCK5+664.400YCK8+696.2243,400m450m500m,3000m5000m23820m,,,,,1,,,,,,,,,11461/(g/cm3)/kPa/MPa/()2-4Qal41.90440.450200202-8Qal42.1080.452810363-7Qfgl+al32.2090.3474674384-4Qfgl+al22.30100.4512633455-3K2g2.32300.4265921452:9001100t,2030mm/min,0.2MPa,6m3/2.1,4222/mA1K8+31415.460A2K8+36015.575A3K8+38015.600A4K8+41715.72522.2A1A4,3,,:(1),,4422.4mm,3(2),20m(6.4),68m(2),10mm,;1318m,5mm,;22mm,1222mm(3)10d,A121,24,214,18.47mm,0.880mm/d3,Peck,1969,Peck,,[2]:S(x)=Smaxe-x2/(2i2)(1)5642010Smax=Vloss2iVloss2.5i(2)Vloss=VLR2(3)i=Z2tan(45-/2)=kZ(4):S(x);x;Smax;Vloss;VL;R;Z;;k;i,(1)(4),kVL,,,i,kVL33kVLkVL/%A10.170.42A20.180.50A30.130.32A40.310.483,k0.130.31,VL0.32%0.50%k=0.22,VL=0.41%,A144,4A14(1),,,,,,(2)68m(2);20m(6.4);22mm,1222mm;10d,(3)k,Peck,k0.130.31[1].[M].:,2004.[2]PECKPB.Deepexcavationsandtunnelinginsoftground[C].Proc7thIntConfonSoilMechandFoundEngrgMexicoCity,1969:275-290.[3].[J].,2008(6):39.[4],,.[J].,2007,44():342.[5],,.[J].,2006(5):30.(:2009-09-28)866