What type of soil is jetting predominantly used for?

Jetting is a method that involves the use of high-pressure water jets to temporarily liquefy soil, allowing for easier excavation or the movement of heavy equipment. This technique is predominantly effective with sandy or granular soils due to their physical characteristics.

Sandy soils have larger particle sizes and higher drainage capability, which means they can be easily disturbed and consolidated with water. When water jets are applied, the sand particles are agitated, creating a slurry that reduces friction and allows for more efficient digging or material displacement. The loose, non-cohesive nature of sandy soil also means that it will return to a more stable state once the water is removed, making jetting a safe and effective option.

In contrast, clay soils are cohesive and hold water, which makes jetting less effective because the water does not penetrate easily or mobilize the soil. Silty soils may also retain water but do not have the same granular characteristics as sandy soils, making them less ideal for jetting. Rocky soils present a challenge for jetting due to their dense and solid nature, which would not respond well to high-pressure water. Thus, the efficacy of jetting is best suited for sandy or granular soils.