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← HistoryWhich structural failure becomes probable when excessive overburden loading occurs above Inca dry stone retaining walls?
A)Material creep in andesite blocks
B)Bulging due to hydrostatic pressure✓
C)Torsion stress causes wall collapse
D)Stone spalling because differential heating
💡 Explanation
When heavy rainfall saturates backfill behind dry stone walls, hydrostatic lift increases. This increased pressure causes lateral bulging, therefore reducing the wall's stability, rather than material creep, as there is no binding agent to allow for compression.
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