Question:
Radial stress on the excavation boundary of a circular tunnel is
Radial stress on the excavation boundary of a circular tunnel is
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Excavation boundary in tunnels experiences zero radial stress.
Updated On: June 02, 2025
- Always zero
- Always positive
- Always negative
- Positive in some areas and negative in some areas
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The Correct Option is A
Solution and Explanation
At the tunnel boundary (excavation surface), radial stress is zero due to free surface conditions.
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