lighteye 发表于 2006-10-31 19:07:14

基坑开挖的工程实例（附命令流和图片）

;-----------------------------------
;土钉支护,水平间距2m，竖向间距2m
;   基坑深16m，模拟深度25m,宽度40m
;-----------------------------------

new
title
------foundation pit excavation------

grid 50,25
gen -40 -25 -40 0 10 0 10 -25

model mohr
prop dens 2000 fric 21 coh 12e3 dil 0.0 ten 0.2e3
prop bulk 111.11e6 shear 37.04e6 j=10 25
prop bulk 444.44e6 shear 148.16e6 j=1 9

fix x i 1
fix x i 51
fix y j 1
ini syy -4.9e5 var 0 4.9e5
ini sxx -2.94e5 var 0 2.94e5   ;静止侧压力系数取0.6
ini szz -2.94e5 var 0 2.94e5   ;静止侧压力系数取0.6   

set small
set grav 9.8
hist unbal
solve
plot hold syy fill
plot hold sxx fill
plot hold szz fill


;设定开挖前状态
ini xdisp =0
ini ydisp =0
ini xvel 0 i 1 51 j 1 26
ini yvel 0 i 1 51 j 1 26
fix x    i 1
fix x    i 51
fix x yj 1

;以下程序为基坑开挖步骤
title
EXCAVATION -- STAGE I
prop coh 20e10 ten 0.2e10
mod null i 41 50 j 23 25
solve
prop coh 20e3 ten 0.2e3
struct prop 1 e=2.1e8 i=6.67e-7 a=.02
struct beam beg grid 41 26 end grid 41 25 seg 1 prop 1
struct beam beg grid 41 25 end grid 41 24 seg 1 prop 1
struct beam beg grid 41 24 end grid 41 23 seg 1 prop 1
stru cable begin grid 41 24 end -14.772,-4.603 seg 30 prop 211
stru prop 211 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 211 sfric 20 perimeter 0.4082
solve

title
EXCAVATION -- STAGE II
prop coh 20e10 ten 0.2e10
mod nul i 41 50 j 21 22
solve
prop coh 20e3 ten 0.2e3
struct beam beg grid 41 23 end grid 41 22 seg 1 prop 1
struct beam beg grid 41 22 end grid 41 21 seg 1 prop 1
stru cable begin grid 41 22 end -13.295,-6.343 seg 27 prop 221
stru prop 221 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 221 sfric 20 perimeter 0.4082
solve

title
EXCAVATION -- STAGE III
prop coh 20e10 ten 0.2e10
model null i 41 50 j 19 20
solve
prop coh 20e3 ten 0.2e3
struct beam beg grid 41 21 end grid 41 20 seg 1 prop 1
struct beam beg grid 41 20 end grid 41 19 seg 1 prop 1
stru cable begin grid 41 20 end -11.818,-8.083 seg 24 prop 231
stru prop 231 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 231 sfric 20 perimeter 0.4082
solve

title
EXCAVATION -- STAGE IV
prop coh 20e10 ten 0.2e10
model null i 41 50 j 17 18
solve
prop coh 20e3 ten 0.2e3
struct beam beg grid 41 19 end grid 41 18 seg 1 prop 1
struct beam beg grid 41 18 end grid 41 17 seg 1 prop 1
stru cable begin grid 41 18 end -9.848,-9.736 seg 20 prop 241
stru prop 241 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 241 sfric 20 perimeter 0.4082
solve

title
EXCAVATION -- STAGE V
prop coh 20e10 ten 0.2e10
mod null i 41 50 j15 16
solve
prop coh 20e3 ten 0.2e3
struct beam beg grid 41 17 end grid 41 16 seg 1 prop 1
struct beam beg grid 41 16 end grid 41 15 seg 1 prop 1
stru cable begin grid 41 16 end -8.371,-11.475 seg 17 prop 251
stru prop 251 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 251 sfric 20 perimeter 0.4082
solve

title
EXCAVATION -- STAGE VI
prop coh 20e10 ten 0.2e10
mod null i 41 50 j 13 14
solve
prop coh 20e3 ten 0.2e3
struct beam beg grid 41 15 end grid 41 14 seg 1 prop 1
struct beam beg grid 41 14 end grid 41 13 seg 1 prop 1
stru cable begin grid 41 14 end -6.894,-13.215 seg 14 prop 261
stru prop 261 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 261 sfric 20 perimeter 0.4082
solve

title
EXCAVATION -- STAGE VII
prop coh 20e10 ten 0.2e10
mod null i 41 50 j 11 12
solve
prop coh 20e3 ten 0.2e3
struct beam beg grid 41 13 end grid 41 12 seg 1 prop 1
struct beam beg grid 41 12 end grid 41 11 seg 1 prop 1
stru cable begin grid 41 12 end -5.909,-15.041 seg 12 prop 271
stru prop 271 e 1.333e11 yield 1.04e6 a 5.6e-4 kbond 3.58e6 sbond 0.28e5
stru prop 271 sfric 20 perimeter 0.4082
solve

save f:\pit\soil1.sav
ret


[ 本帖最后由 lighteye 于 2006-10-31 19:30 编辑 ]

lighteye 发表于 2006-10-31 19:28:37

请教大侠们的问题

1.为何土钉的轴力分布不是中间大、两头小，特别对于第6、7排土钉？
2.基坑的滑移场不是太理想，地表沉降和水平位移已经达到50mm了，基坑的滑移场还未贯通？
3. 如何正确模拟面层的作用，在程序中，主要用了beam单元，是否可以？
4.参数取值是否合理？

望高手们赐教！

烟雨中国 发表于 2006-11-22 12:36:24

一运行就错误。。唉。。。我是新手。。。。。。。。。。。。。。。

黄高峰 发表于 2007-1-18 16:31:22

请问lighteye ，你的位移图和土钉轴力是通过啥命令做出来的？？

smx 发表于 2007-1-18 23:32:56

手册上的例子   




,

hpuwsj 发表于 2007-3-26 18:30:25

土钉与锚杆是不一样的

需要把端头处理一下，这个问题可以参考论坛上有关的帖子，一个高手写的，很好。

xvnuwen 发表于 2008-3-7 10:49:50

FLAC2D命令呀，最好用FLAC3D

sy1884 发表于 2008-11-1 19:06:47

有没有三维建模的！？？？

凌晨两点 发表于 2008-12-8 21:58:30

回复 1# lighteye 的帖子

最好打包，这样粘贴的布好看

凌晨两点 发表于 2008-12-8 22:00:05

怎么没有会加筋土挡墙模拟的啊

跪求加筋土挡墙的例子啊

mengqb 发表于 2010-11-2 16:31:13

好资料 谢谢分享:)

lsjing393 发表于 2010-11-3 15:32:05

好资料 谢谢分享

yuefeng0917 发表于 2010-11-3 19:29:19

最好在3D里做

ihavename 发表于 2011-4-19 15:27:52

2D的不了解
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