FLAC3D3.0在某隧道工程开挖支护中的应用 U7g,@/Qx `jCq`-.
隧道建模命令流入下: ieWXr4@: 7.xJ:r|
set log on (|<+yQ,@> TWTRMc;z+
set logfile yang.log +eKLwM =v/x&,Uj@6
gen zon radcyl p0 0 0 0 p1 9.0 0 0 p2 0 50 0 p3 0 0 8 & /F|VYl^_ 1V1T1
size 4 20 6 4 dim 6 5 6 5 rat 1 1 1 1 group 围岩 L\bc R %b`B.A
gen zon cshell p0 0 0 0 p1 6.0 0 0 p2 0 50 0 p3 0 0 5.0 & 3KkJQ5a 4$b9<:M_
size 4 20 6 4 dim 5.6 4.6 5.6 4.6 rat 1 1 1 1 group 初期支护 =1)9>=} Cl3hpqv1I
gen zon cshell p0 0 0 0 p1 5.6 0 0 p2 0 50 0 p3 0 0 4.6 & <1x u&Z7 BGVy
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size 4 20 6 4 dim 5.0 4.0 5.0 4.0 rat 1 1 1 1 group 二次衬砌 fill group 原岩 vJ 28A w^QqYUL${
gen zon radcyl p0 0 0 0 p1 0 0 -8.0 p2 0 50 0 p3 9.0 0 0 & **1=|aa: .ZOyZnr
Z
size 4 20 6 4 dim 3 6 3 6 rat 1 1 1 1 group 围岩2 Y(T$k9%}+ fT_swhIO
gen zon cshell p0 0 0 0 p1 0 0 -3.0 p2 0 50 0 p3 6.0 0 0 & M A%g-} >.#tNFAs
size 4 20 6 4 dim 2.6 5.6 2.6 5.6 rat 1 1 1 1 group 仰拱初期支护 !g|[A7<| z50f$!?
gen zon cshell p0 0 0 0 p1 0 0 -2.6 p2 0 50 0 p3 5.6 0 0 & |GPY bxzc e\>g@xE%
size 4 20 6 4 dim 2 5 2 5 rat 1 1 1 1 group 仰拱二次衬砌 fill group 仰拱原岩 ,#0#1k<Dm WnC0T5S?U
gen zone reflect normal -1 0 0 FS!vnl8` *gXm&/2*
gen zone radtun p0 0 0 0 p1 45 0 0 p2 0 50 0 p3 0 0 20 & N>sH T =_ UHUO9h
size 3 20 3 12 dim 9 8 9 8 rat 1 1 1 1.1 group 围岩3 D&],.N u+uu?.bM
gen zon reflect dip 0 ori 0 0 0 range x 0 9 y 0 50 z 8 20 3YUF\L]yyw {1`n^j(>
gen zon reflect dip 0 ori 0 0 0 range x 9 45 y 0 50 z 0 20 _tQM<~Y]u\ eE;")t,
gen zon reflect dip 90 dd 270 ori 0 0 0 range x 0 9 y 0 50 z 8 20 aHitPPlq 1Du9N[2'P
gen zon reflect dip 90 dd 270 ori 0 0 0 range x 0 9 y 0 50 z -8 -20 .i#'IS0c WWYG>C[
gen zon reflect dip 90 dd 270 ori 0 0 0 range x 9 45 y 0 50 z -20 20 <Y;w I#C "Q<*H<e
gen zon brick p0 -45 0 -20 p1 -45 0 -40 p2 -45 50 -20 p3 45 0 -20 & WK{F d@t3C8
size 5 20 6 rat 1.1 1 1 group 围岩4 f&Juq8s_0 &,@wLy^T
save tun_model.sav PT4iy< &:)e
假设围岩岩体符合mohr-coulomb本构模型,给围岩赋参数命令流如下, lpbcpB <0I=XsE1iX
; mohr-coulomb model sv6 m)pwh quw:4W>
model mohr @)ls+}=Y o M#S.f?
def derive @qB>qD~WsD &;k`3`MC~w
s_mod1=E_mod1/(2.0*(1.0+p_ratio1)) I*n]8c %epK-q9[
b_mod1=E_mod1/(3.0*(1.0-2.0*p_ratio1)) tY#Zl 54~{ y7#4Mcc`~
s_mod2=E_mod2/(2.0*(1.0+p_ratio2)) E,Xl8rC \:wLUGFl5
b_mod2=E_mod2/(3.0*(1.0-2.0*p_ratio2)) XQ8q)B= S~DY1e54GF
end 3jHE,5m ihdtq
set E_mod1=0.6e9 p_ratio1=0.27 E_mod2=0.8e9 p_ratio2=0.26 qI<c47d;q ?YbZVoD)J
derive #8y"1I=i& ss>?fyA
prop bulk b_mod1 shear s_mod1 cohe 1.8e6 tens 0.8e6 fric 30 range z 4.5 20 tqjjn5! abM4G
prop bulk b_mod2 shear s_mod2 cohe 2.8e6 tens 1.0e6 fric 35 range z -40 4.5 e7plL^^` H=k*;'
ini dens=2300 D$E#:[ 8RR6f98FF
set grav 0 0 -10 ]@}o"Td Bh,LJawE
; boundary and initial conditions _nSEp >]L 15FGlO<<
apply szz -1.4e6 range z 19.9 20.1 ubc k{\. D?"TcA
fix z range z -40.1 -39.1 ?yu@eo OT5'c l
fix x range x -45.1 -44.9 b`f6(6 >#\&%0OZw
fix x range x 44.9 45.1 :z6? c F(]`49(
fix y range y 49.9 50.1 (!Xb8rV0_ "A?_)=zZ
hist unbal r$Ik* R #FV(a ~
hist gp xdis 6.0,0,0 5r d t tY=n("=2
hist gp zdis 0,0,5 muKu@nshL =F}e>D
hist gp xdis 6.0,50,0 2 #cw_Ua #i GRi!$h
hist gp zdis 0,50,5 K1- RJj\L >, }m=X8
plot hist 3 ZVit] 3hd &c!=< <5M
solve ?9?o8! s~6irf/
save tun_nature.sav X7gB.=\X I:aG(8Bi)H
对后面计算而言,模型建立时岩体在开挖前认为位移已经终了,因此需要对位移进行“清零”,而应力可以保留。假设隧道先开挖上断面,中间不设支护,直到进尺50m,那么此时位移和应力的分布情况可用如下命令流 $"#M:V @ AFSFXPl
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ini xdis=0 ydis=0 zdis=0 !~ j9Oc^ +iPS=?S
plot re y{XNB}E O}3M+
model null range group 原岩 M3dUGM cIgicp}U
model null range group 二次衬砌 5r;)P po N]sX
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model null range group 初期支护 =w:H9uj6F Eqva]
4
set large ZY;g)`E1 =JnUTc_u
hist unbal h,]lN'JG{ ZWJFd(6
plot hist 3 R80|q#h,] V-w[\u
solve ~u?rjkSFoh {9Op{bZ
save tun_ext1.sav 472 'P P!";$]+
如果在开挖后适时对隧道进行锚喷混凝土初期支护,该命令流如下: 37V$Qb_ Uq6..<#
restore tun_nature.sav Exat_ L'? 1dK^[;v>3
ini xdis=0 ydis=0 zdis=0 g](&H$g ~U~4QQ V
plot re U/7jK40 s"?&`S
model null range group 初期支护 >PGsY[N W$Bx?}x($
model null range group 二次衬砌 V0gu0+u~R 'm=9&?0S
model null range group 原岩 / ]nrxT a;Y9wn
step 100 (k%r_O 6 '4A8\&lQO
hist unbal 4&~*;an7 Bv |Z)G%RR
plot hist 3 rE\&FVx *{)![pDYd
mo el range group 初期支护 `oE.$~' S-h1p`
prop bulk 1.33e9 shear 0.8e9 cohe 2.2e6 tens 1.2e6 fric 32 range z 4.5 7.0 x -7.0 7.0 Ge76/T%{Q F#^ .L|d4
prop bulk 10.9e9 shear 8.9e9 dens 2500 range group 初期支护 M/}i7oS] UmU=3et<Wj
set large QX9['B< !m1pL0
solve _%aT3C}k dR_hPBn/@
save tun_ext2.sav