Q81
Which factor contributed to ground heave during Crossrail tunneling in London?
A.
High overburden pressure
B.
Expanding clay (London Clay)
AnswerC.
Glacial moraine compression
D.
Water table rise
Answer: Option B
Solution
Answer: Option B
Solution:
London Clay expands upon unloading or moisture gain. During Crossrail tunneling, this caused ground heave in some areas, which had to be carefully monitored.