Hard Ground Press-in Method

Hard Ground Press-in Method


The "Hard Ground Press-in Method" is a newly developed penetration acceleration technology with the practical use of the unique GIKEN "Coring Theory" to enable pile installation on unfavorable ground conditions such as sandy gravel, cobble stone, boulders, or rock layers without losing the superiorities of the Press-in Method.

In this theory, a pile auger, which is integrally controlled with a press-in machine, first excavates the ground just beneath the pile toe, and then the press-in machine installs the pile further into the ground to fill the gap made by the excavation at the same time as the pile auger is withdrawn. Therefore, the area to be excavated and the amount of soil discharged can be minimized, thus overcoming the hard ground conditions while taking the environment into consideration.


Applicable to ground conditions with an SPT value with over 50

The Hard Ground Press-in Method makes it possible to install piles through a hard soil layer with an SPT value greater than 50, which has been difficult with conventional methods.

Reducing impact on the surrounding environment

The "Coring Theory" allows the excavation area to be kept to a minimum, thereby reducing the amount of soil discharge and the impact on the surrounding ground.

High level of safety with no risk of machine overturning

The press-in machine main body has a mechanism that grips the completed piles firmly, so there is no risk of it tipping over. Moreover, the pile auger and the pile being pressed-in are secured by a unique chucking mechanism, which maintains a high level of safety.