1. Soil with low bearing capacity, poor compaction, or insufficient strength to support structures or withstand loads
The foundation failed because the weak soil could not support the weight of the building.
A fundação falhou porque o solo fraco não conseguia suportar o peso do edifício.
2. Soil lacking cohesion or having low shear strength, often problematic in construction and engineering
Engineers had to use pilings to reach firm ground beneath the weak soil.
Os engenheiros tiveram que usar estacas para chegar ao solo firme abaixo do solo fraco.