The East-West Metro Tunnel under the Hooghly river was executed using:
A. Cut-and-cover method
B. Tunnel boring machines (TBM)
C. Drilled shaft tunneling
D. Immersed tube method
Answer: Option B
Solution (By Examveda Team)
The East-West Metro in Kolkata used a tunnel boring machine (TBM) to excavate the river crossing beneath the Hooghly. This method minimized surface disturbance and managed soft ground.Which geotechnical failure occurred in the 1963 Vajont Dam disaster in Italy?
A. Overtopping of dam
B. Foundation failure
C. Landslide into reservoir
D. Earthquake-induced cracking
What was the main geological issue in the Panama Canal expansion project?
A. Lava flow
B. Marine sediment instability
C. Hard rock tunneling
D. Seismic liquefaction
In the case of the Leaning Tower of Pisa, what caused the leaning?
A. Uneven settlement due to clayey soil
B. Earthquake damage
C. Poor construction material
D. Tectonic movement
Which engineering technique stabilized the Hong Kong slopes after landslide disasters?
A. Tunneling
B. Shotcreting and soil nailing
C. Earth reinforcement
D. Floating raft foundation
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