Which outcome occurred when a Roman siege ramp's mud-brick layer lacked quick drainage during a rainstorm?

💡 Explanation

A ramp's failure results from catastrophic liquefaction because increased pore pressure reduces effective stress through the material, which destabilizes wet soil. Therefore, the ramp collapses rather than proving tractive, because mud dries and destabilizes, and rather than soil packing against stresses.

• Which outcome increases when Roman roads experienced increased cart weight?
• Which risk increases when a medieval trebuchet bridge uses insufficiently lubricated capstan bearings?
• Which phenomenon explains efficient water transport by shallow Mughal garden canals?
• Which metallurgical consequence occurred when Assyrian smiths quenched high-carbon steel too rapidly using river water?
• Which consequence results when terrace agriculture drains excessively?
• Within Bronze Age smelteries, which risk increases due to insufficient furnace draft?