Tunneling techniques
Tunnels are constructed for transportation purpose as an artificial passage they are required for money purposes.
Uses
- Highway
- Railway
- Seaway disposes
- Water supply
Methods of tunneling
1. Firm ground
2. Soft ground
3. Running ground
4. Rock
1. Tunneling in Firm ground
Methods to be shape, size, and available equipment
a) Full face method
b) Top heading method
c) drift method
a) Full face method
Excavation to be done is divided into 3 or more section first the top section is cut followed by 2 and 3
b) Top heading method
C) Drift method
2. Tunneling in soft ground
In such cases, the traditional method attempted with "fore poling method"
This method consists of driving boards ahead to support them which are known as spiles
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