Civil Engineering - Tunnelling - Discussion
Discussion Forum : Tunnelling - Section 1 (Q.No. 22)
22.
Forepoling method is generally adopted for tunnelling in :
Discussion:
7 comments Page 1 of 1.
Agha Bilal said:
12 months ago
Running ground is the correct answer.
Lp said:
6 years ago
1) Running ground: Requires instant support throughout the excavation. Examples include dry sand, gravel, silt, mud, and water-bearing sand.
2) Soft ground: Requires instant support for the roof but the walls can do without support for a few minutes. Examples include damp sand, soft earth, and certain types of gravel.
3) Firm ground: The sidewalls and face of the tunnel can do without support for one or two hours, but the roof can last only a few minutes. Examples include firm clay, gravel, and dry earth.
2) Soft ground: Requires instant support for the roof but the walls can do without support for a few minutes. Examples include damp sand, soft earth, and certain types of gravel.
3) Firm ground: The sidewalls and face of the tunnel can do without support for one or two hours, but the roof can last only a few minutes. Examples include firm clay, gravel, and dry earth.
Lalit said:
6 years ago
Soft Ground(Earth).
Workers dig soft-ground tunnels through clay, silt, sand, gravel or mud.
Workers dig soft-ground tunnels through clay, silt, sand, gravel or mud.
Rahul Desale said:
6 years ago
The answer should be Running Ground.
Akshay said:
8 years ago
Option c is correct.
Kailas said:
8 years ago
Running ground like cohesionless materials.
Anurag said:
8 years ago
Answer: Running Ground.
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