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How can I design tunnels by using autocad land desktop?

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Question added by محمد محمود عبد الحميد عثمان , CONSULTANT CIVIL ENGINEER ( ROAD CONSTRUCTION) , CONTRACTOR OFFICE IN ELFAYOUM CITY
Date Posted: 2013/05/21
Omair Abduljaleel Ali Al-Quliey
by Omair Abduljaleel Ali Al-Quliey , مدير لمكتب المهندسين اليمنيين , مكتبي مكتب المهندسين اليمنيين

We can design the tunnels by use circle template and this template must had some specially details when you prepare it.   

محمد محمود عبد الحميد عثمان
by محمد محمود عبد الحميد عثمان , CONSULTANT CIVIL ENGINEER ( ROAD CONSTRUCTION) , CONTRACTOR OFFICE IN ELFAYOUM CITY


1- control point survey wark by using gps station and total station to locate tunnel path exactly in field
2- locate the center line of the tunnel and begin to draw cross section of the tunnel every 25 meter
3- you have to take sample from soil every 50-100 meter to know the type of soil if this soil is collapsable soil or expansion soil and to know the rock mass rock material of soil
4- so the load in tunnel will be changed every 25 meter because of the type of soil
5- after to get the load every 25m in tunnel cross section you have to get coordinate of the located tunnel every 25m
6- you have to know where is the collapsable crown in tunnels so you can distribute the rockbolts pretension to prevent the collapse in tunnel

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