Computer · Tunnel Engineering
Consider the following statements with reference to the adoption of a circular cross-section for tunnels driven by the shield method: (i) The circular cross-section provides maximum cross-sectional area with the minimum perimeter. (ii) Circular cross-section does not afford protection to the primary lining. (iii) Circular cross-section offers the least resistance to the easy rotation of the shield. (iv) Circular cross-section is not ideally suitable for resisting semi-fluid pressure. Which of the above statements are INCORRECT?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(i), (iii) and (iv)
- 2(i) and (ii)
- 3(ii) and (iv)✓
- 4(i) and (iii)
Correct answer
(ii) and (iv)
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