[求助]基坑支护flac 3的模拟 [复制链接]

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new .5Y{Yme  
gen zone brick p0 0 0 0 p1 80 0 0 p2 0 80 0 p3 0 0 30 size 40 40 15 <CVX[R]U  
model  mohr Nx.9)MjI  
prop bulk 9.2e10 shear 4.7e10 fric 50 {%3WHGr%L  
prop coh 1e10 tens 1e10 "y
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set grav 0 0 -10 @ 3=pFYW)  
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fix x y range x -0.1 0.1 0
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fix x y range x  79.5 80.5 oUnb-,8n  
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fix x y range y  79.5 80.5 anW['!T9{s  
fix x y z range z -0.1 0.1 w3(G!:  
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hist id=1 unbal 4N,[Gs<7  
solve )r46I$]>  
save chushiyingli.save SEI0G_wk$  
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prop bulk 2.06e7 shear 1.01e7 fric 8 coh 15e3 E'\gd7t ;  
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基坑尺寸40m×40m×12m，采用φ500的悬臂桩支护桩，请问一下各位老师为什么我模拟出的支护桩和桩后土向坑外移动？请老师们帮忙看看是不是桩的参数和冠梁参数取错了。 E M
Kv)5MH  
这是基坑y向位移的一张云图。

图片:整体y向位移云图.png

请各位老师帮我找下原因。

建议你仔细看看程序，你垂直方向取了30米，划分了15个单元格，每个单元格是2米，挖土阶段怎么会出现29米？

kunshan_zqs:建议你仔细看看程序，你垂直方向取了30米，划分了15个单元格，每个单元格是2米，挖土阶段怎么会出现29米？ (2013-09-28 22:54)  UmSy p\i  

$5`P~Q'U  
首先谢谢您的解答。29m是施工冠梁的第一个工况！

如果对半个单元的材料参数取为零，程序上是否允许，或者会出现什么状况？你是否可以考虑把上面28至30之间划为两层单元

kunshan_zqs:如果对半个单元的材料参数取为零，程序上是否允许，或者会出现什么状况？你是否可以考虑把上面28至30之间划为两层单元 (2013-09-30 14:59)  LE!xj 0  

)aov]Ns  
我找到原因了，是桩的侧向刚度和粘结强度取值太大了，我调整了一下过去了。你的将28至30划分为两个单元，也是有理的，我试过如果将桩设置在网格中间，比如说20.5的位置处，就不能计算了，不知道这是什么原因……

修改后的模拟效果可否给大家看一下呢