土压平衡盾构刀盘开口率选型及其对地层适应性研究

43320103CHINACIVILENGINEERINGJOURNALVo.l43Mar.No.32010:,,:20081013王洪新(,200065):,,,,100%,,;,,,,:;;;;:U455.43:A:1000131X(2010)03008805TypeselectionoftheheadapertureratioofEPBshieldcutterheadsandadaptabilitytostratumcharacteristicsWangHongxin(ShanghaiNo.2MunicipalEngineeringCo.,Ltd,Shanghai200065,China)Abstract:TheheadapertureratioofEPBshieldcutterheadsisanimportantindexwhenthetypeofshieldisdetermined.Theinfluenceofheadapertureratioonmuckingrateisanalyzed,andamethodispresentedtocalculatetheadaptabilityofheadapertureratiotostratumcharacteristics.ThismethodcouldexplaintheabnormalphenomenaofmuckingrateinsandstrataforamodelEPBshielddrivingonatestplatform.Cutterheadsbyproperheadapertureratioscanreachmaximummuckingrate,otherwisetheshieldthrustforceandcutterheadtorquemayincreasesharply.TheproperheadapertureratioofcutterheadsissuggestedforEPBshieldtunnelingintypicalstratainShangha.iKeyword:EPBshield;cutterhead;headapertureratio;muckingrate;adaptabilitytostratumcharacteristicsEmail:[e-mail],,,:,,1.8m,[12],[3],,[2]1,43389,(),30%,,1!,60%~95%M6M8(IHI)6.52m,85%,2,35%~50%[3],,,,;,!,,,,2,,,,,,,;,,,;,,,,,1.8m,30%,,,100%,70%,,,100%1.8m[1]30%3,4,70%5[2]:,(),,,,,,,,,!,,,3,[4],90201043391[4],,p,Qa,QaQa/pQa/p:Qap=!2D3v82ck1+(1+K0)∀Htan#k2L(1):!;D;v;c#;H;∀;K0;k1=4.3,k2=1.8;L100%,Qt:Qt=D24v(2)100%(),,:Qa=Qt(3)(1)(2),,:p=22ck1+1+K0∀Htan#k2L!2D(4)p0,pa,,:p∀p0-pa(5),100%,:22ck1+1+K0∀Htan#k2L!2D∀p0-pa(6),,100%,,,,:Qmax=!2D3vp0-pa82ck1+(1+K0)∀Htan#k2L(7)Qt,:emax=QmaxQt=!2Dp0-pa22ck1+(1+K0)∀Htan#k2L(8),emax#100%(8)1.8mc=0,#=34∃,∀=20.2kN/m330%,(8)emax19.0%,3emax,,70%,emax103.3%,15∃,emax207.8%100%,207.1%(5),,1.8m44.1(1),,100%,(1),,p=p-pBVl:Vl=p!2D3v82ck1+(1+K0)∀Htan#k2L1v=(p-pB)!2D382ck1+(1+K0)∀Htan#k2L(9),pB;,,,922010,:(1),emax100%,,;(2),,4.2,,6.34m(H=15m,,,)(1)~%,c#11.5~15.7kPa8.5∃~16.9∃,,30%~40%(2)&1&2,c#42.9~53.0kPa15.5∃~20.9∃,50%,&,%,,,&1&2,,(3)∋2(1(2,0~14.2kPa0~10.0kPa0~7.1kPa,23.5∃~37.0∃27.5∃~38.5∃29.5∃~39.5∃,60%40%,,10∃(4),,%∋2,30%~40%,∋2&(,50%~60%5,1.8m,,,,,,,致谢:本文引证数据参考了笔者参与的上海隧道工程股份有限公司863计划!项目(2003AA420110),在此,对该项目主要负责人)))周文波傅德明及李向红等同志表示衷心的感谢![1],.[J].,2006,28(9):11011105(LiXianghong,FuDeming.ExperimentalstudyonexcavationbehaviourusingmodelEPBshieldwithadiameterof1.8m[J].ChineseJournalofGeotechnicalEngineering,2006,28(9):11011105(inChinese))[2].[R].:,2004[3],.[J].,2007,24(6):4446(SongKezh,iWangBenfu.Commontypesofshieldcutterwheelandselection[J].RoadMachineryandConstructionMechanization,2007,24(6):4446(inChinese))[4].[D].:,2009(WangHongxin.CalculationofdeviceparametersandbalancecontrolofEPBshieldinsoftsoilstrata[D].Shangha:iTongjiUniversity,2009(inChinese))(1973-),,,