文本内容:
;FLAC3D
3.0在某隧道工程开挖支护中的应用;隧道建模命令流入下set logonset logfileyang,loggen zon radcyl pO00pi
9.000p20500p300size42064dim gen655rat1111pl
6.0group围岩zon cshell pO size40000p20500p
3005.02064dim gen zon
5.
64.
65.
64.6rat01111group初期支护cshell pO size420600pl
5.600p
24.00500p
3004.64dim gen zonradcyl
5.
05.
04.0rat1111group二次衬砌fill group原岩pO size42064dim000pl00-
8.0p20500p
39.000gen zon cshellpO3636rat1111group围岩2size42064dim gen000pl00-
3.0p20500p
36.000zoncshellpOsize
42.
65.
62.
65.6rat1111group仰拱初期支护2064dim000pl00-
2.6p20500p
35.6002525rat1111group仰拱二次衬砌fill group仰拱原岩newgen zonereflect normal-100gen zoneradtun pO000pl4500p20500p30020size320312dim9898rat
1111.1group围岩3apply szz-
1.4e6range z
19.
920.1fix zrangez-
40.1-
39.1fix xrange x-
45.1-
44.9fix xrange x
44.
945.1fix yrange y
49.
950.1hist unbalgen zon reflect dip0ori000range09y050z820gen zonreflect dip0ori000range x945y050z020gen zonreflect dip90dd270ori00range x09y050z820genzonreflect dip90dd270ori00range x09y050z-8-20genzonreflectdip90dd270ori00range x945y050z-2020genzonbrick pO-450-20pl-450-40p2-4550-20p3450-20size5206rat
1.111group围岩4save tunmodel,sav;假设围岩岩体符合mohr-coulomb本构模给围岩赋参数命令流如下,型,;mohr-coulomb modelmodel mohrdefderives modl=E modi/
2.0*
1.0+p ratiolbmod1=E_modi/
3.0*
1.0-
2.0*p_ratiols_mod2=E mod2/
2.0*
1.0+p_ratio2b_mod2=E_mocl2/
3.0*
1.0-
2.0*p_ratio2endset Emod1=
0.6e9p_ratiol=
0.27Ejnod2=
0.8o9p_ratio2=
0.26deriveprop bulkb modishear smodi cohe
1.8e6tens
0.8e6fric30range z
4.520prop bulkb_mod2shear s_mod2cohe
2.8e6tens
1.0e6fric35range z-
404.5ini dens=2300setgrav00-10;boundary andinitial conditionshist gp xdis
6.0,0,0hist gpzdis0,0,5hist gpxdis
6.0,50,0histgpzdis0,50,5plot hist3solve savetun nature,sav;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ini xdis=0ydis=0zdis=0plot remodel null range group原岩model null range group二次衬砌model nullrange group初期支护set largehist unbalplot hist3solvesave tun_ext
1.sav;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restore tun_nature.savini xdis=0ydis=0zdis=0plot remodel nullrange group初期支护modelnul1range group二次衬砌modelnullrange group原岩step100histunbalplothist3mo elrangegroup初期支护prop bulk
1.33e9shear
0.8c9cohe
2.2c6tens
1.2o6fric32range z
4.
57.0x-
7.
07.0prop bulk
10.9e9shear
8.9e9dens2500rangegroup初期支护set largesolvesavetun oxt
2.sav。