A contractor has completed a dynamic compaction program across a $50,000\text{ m}^2$ site containing loose silty sand. The project specification requires a minimum relative density ($D_r$) of $75\%$ to a depth of $8\text{ meters}$ to mitigate liquefaction risk. The engineer uses the Cone Penetration Test (CPT) for verification.

A contractor is installing wet deep soil mixing (DSM) columns to stabilize a highly sensitive marine clay. The specification requires the soil-cement columns to achieve an undrained shear strength ($s_u$) of $300\text{ kPa}$ after 28 days of curing.

A contractor has used jet grouting to create an interlocking curtain wall beneath an existing dam. To ensure there are no gaps or "windows" in the curtain wall where seepage could occur, the engineer must verify the continuous integrity of the grouted mass.

During the compaction of a subgrade in a karst geology region (limestone), the vibratory roller suddenly experiences localized severe settlement. The engineer suspects a small sinkhole or void has opened beneath the subgrade, but the surface remains intact.

A warehouse is being built on soft clay treated with PVDs and a surcharge load. The engineer must determine exactly when to remove the surcharge load. Removing it too early will result in unacceptable settlement of the warehouse; leaving it on too long wastes valuable construction time.

An existing natural slope is showing signs of distress (tension cracks) after a nearby excavation. The engineer stabilizes the slope using an array of ground anchors. However, long-term monitoring is required to ensure the anchors are effectively halting the deep-seated movement.