Which vulnerability arises when design choices impede proper interlocking and compaction during Roman castra wall construction?

💡 Explanation

When adequate interlocking and compaction are not achieved in castra walls, void spaces and discontinuities increase because soil mechanics principles dictate that a dense, cohesive structure better resists external forces. Undermining becomes easier. Therefore increased susceptibility to undermining results, rather than thermal cracking, projectile damage, or weathering which involve different mechanisms.

• Which outcome resulted from the deliberate flooding of chinampas during the dry season?
• Which optical mechanism allowed Alhazen (Ibn al-Haytham) to experimentally demonstrate rectilinear propagation of light using pinhole setups?
• Which structural weakness frequently undermined Roman siege ramp ("agger") construction against fortified cities?
• Which structural problem plagued ironclad warships attempting ramming maneuvers circa 1870?
• Which function did the "umbra recta" and "umbra versa" scales serve on a medieval astrolabe?
• Which optical outcome critically limited the accuracy of early astrolabes using pinhole sights?