圆管涵洞设计施工中的问题

6(121)No.6(TotalNo.121)19991220EASTCHINAHIGHWAYDecember19993:1999206201(,230000),,11,,,,111(2),,,,,,(),,2112,,,,93©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.113,100cm150cm,175cm,,,()114,,,(3),,,,,32,211(),,;,12212(),2,213,2,,214(),,11151cm115cm,,,,,33,(),f1,f2,f=f1-f2,L,Á,QÁ=1Q=8fL2MfMf=I0h0-xfCRLMf;I0;xf,;C;RL[Á],[Á]=MfBcBc,Bc=Bd2;Bd04©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Bd=EgAgh2011157+012+6nLEgAg;7,,7=1;n;L=Agbh0,[Á],[Á]Á1m,1,22m,70cm,22cmÁ=8fL2=8(70-22)22002=010000793=719310-520#,RL=13kgföcm2,,b=120cmh=30cmh0=25cm,6514,Ag=91232cm2,MM=Agbh0=9123212025=01003077n=EgEh=210105216104=717A0=bh+nAg=12030+71791232=3671cm2Xf=bh22+nAgh0bh+nAg=1203022+717912322512030+71791232=15115cmI0=bx3f3+b(h-xf)33+nAg(h0-xf)2=1201511533+120(30-15115)33+71791232(25-15115)2=277000cm4Mf=I0h0-xfrRL=27700025-15115117513=640000kgfcmBd=EgAgh2011157+012+6nL=21069123225211151+012+671701003077=7137109kgföcm2Bc=Bd2=3187109kgföcm2[Á]=MfBc=6400003173109=01000165Á=010000793,,,010001,,[Á]=2Eh=201000130=61710-6(1cm)Á=719310-5(1cm),,[1]11:,1989[2]11:,1988[3]11:,199314©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.