Geotechnical engineers are responsible for understanding the properties and behavior of soil and rock, and for applying this knowledge to the design and construction of structures and infrastructure.

Gravel is a type of rock, not soil.

Bearing capacity is the ability of soil to support a load without excessive settlement.

Pile foundations are commonly used for structures built on soft or loose soil because they transfer the load of the structure to deeper, more stable layers of soil.

Geotechnical investigations are conducted to determine the properties of soil and rock at a site, identify potential geotechnical hazards, and recommend appropriate foundation design and construction methods.

Tunnels are not earth structures, they are underground structures.

Compaction is the process of compacting soil to increase its density and strength.

Floods are not geotechnical hazards, they are hydrological hazards.

Percolation is the movement of water through soil.

pH test is not a soil test, it is a water quality test.

Permeability is the ability of soil to allow water to pass through it.

Erosion is not a type of foundation failure, it is a type of soil erosion.

Grouting is the process of strengthening soil by injecting chemicals or other materials into it.

Geocell is not a type of geosynthetic material.

Dewatering is the process of removing water from soil.