软弱围岩条件下的大断面小净距浅埋隧道施工方案研究

20071No125(350007)[],,[];;Abstract:Thispaperanalyzedthethreeconstructionschemeforthelargesectionlownet-distanceandshallowtunnelundertheconditionofclassIIsurrounding-rockofdualandsinglesidewallandgrademethodcomparatively,bycombiningthetheoreticalanalysisandcomputersimu2lationtechnology,andprovidedreferenceandguidefortunneldesignandconstruction1Keywords:largesectionlownet-distancetunnel;finiteelement;numericalsimulation:200701311,,,,,,,,,2,-;;;,,;,:;4;5,11,,,3311(1,2,3),,2:2,,,,,,31234,,,,,,,,,,3(),,620071No124(),,,,,,31356,L()78,HL,,5L(),,,,,-016mm014mm111mm6L()7H()H,,8H()H,,,,;,,,,,,314,:,,,,,,313kN1m,341kN1m323kN1m,,,,,,,,,315,1,,,,,,;,,1Uxmax2132mm2165mm3138mmUymax-6193mm-7127mm-8166mm1max11019MPa01952MPa11173MPamax01340MPa01345MPa01354MPa,,,,,,,,,,(2)220071No12NaClO313kg31%HCl,1:1.5,GPF-8000E,1NaClO3100ClO2,7mg/l,ClO22.66mg/l:2.66mg/L2.63=7mg/l,1mgClO2,0.5mgCl2,2.66(2.63+0.5)=8.3258mg,3.3(1)ClO2,,ClO2,,:;ClO2,106/L;8mg/L,,,8mg/L5mg/L,20/L,5mg/L5.95mg/L,GB18918B,104/L,(2)TPTN;NH-3N8mg/L,,ClO2,NH-3N(3)PHClO2,PH,ClO2(4)CODBOD5SSClO2,,,CODBOD5ClO2SS,4,ClO2,,,BOD5CODCr,SSNH3-N,,,,5mg/L,20/L,GB18918B,104/L,,CODCrBOD5SSNH-3NClO2,ClO2[1],[M],,2005,5[2],,[J],,2000,16(9):53-55(6),,4,,,,,,,;,,,,,,,;,,,,,,,,,,,,,,,,,,,,,,,,,5,,,[1](JTJ026-90)[2](JTJ0261-1999)[3](JTJ026-94)[4]200617