High pressure water jetting can increase pored water pressure around pile toe and create temporarily status that soil particles are moved easily. At the same time, upstreaming water flow reduces skin friction of pile and reduces interlock resistance by washing out soil inside interlock. Therefore Press-in with Water Jetting reduces penetration resistance, and enables the pile installation to be conducted with adequate press-in force.
The water jet lubricates the pile surface and temporarily and locally loosens and softens the ground. As the water pressure and water flow can be controlled depending on the ground conditions, ground disturbance can be minimized by this regulated water flow.