Heaving or squeezing would be indicated by which of the following signs?

A. A tension crack

B. A bulge at the bottom

C. Water seeping up from the bottom

D. Vibrations from passing traffic

Answer

The correct answer to the query is B. A bulge at the bottom.

Explanation:

Heaving or squeezing often refers to ground movement that can occur in various geological scenarios, such as soil expansion or contraction due to moisture changes, freeze-thaw cycles, or even seismic activity.

A. A tension crack: This typically indicates that the ground is pulling apart rather than heaving or squeezing, which would suggest movement in the opposite direction.

B. A bulge at the bottom: This sign indicates that the ground is pushing outward or upward, which is consistent with heaving—an upward movement of soil or surface due to internal pressure.

C. Water seeping up from the bottom: While this could indicate ground movements related to water pressure, it doesn’t directly indicate heaving or squeezing action itself. It could be a symptom of other issues.

D. Vibrations from passing traffic: Vibrations suggest movement but are related to external forces acting on the ground rather than ground deformation itself.

Therefore, a bulge at the bottom is the clearest indication of heaving or squeezing action occurring beneath the surface.