We offer a piling sheet pressing push pull system technique, which starts working when powerful hydraulic clamps take hold of the tops of several interlocked piling sheet. Then a piling rig to push the piles applies down-crowd force. The piling rig stops pushing until it reaches its safe load limit, which usually is after several meters of penetration. Thereafter the hydraulic cylinders apply vertical force to one piling sheet and simultaneously reacting on the rest of the group. During this part of the process, the hydraulic cylinders maintain their initial pre-load. The vertical force requires an opposite reaction, which is equally strong. The biggest part of this opposite reaction is provided by the weight of the reaction piles and the piling rig. In the end the penetration of the pile group is the most important factor in developing adequate total reaction, as this advances the skin friction between the ground and the reaction piles.

When all piles in the group are advanced, the pressing device retracts and the cycle repeats. Even though the total numbers of cylinders can vary, the process stays the same. When a pile group is installed, the machine can position the next pile group using the same method. A huge advantage of the rigid leader is that it provides perfect pile alignment. The result of perfect pile alignment is that the quality of the installation increases and the interlock friction is minimized. Lastly, this process does not need a temporary reaction frame to start the first piling sheet, unlike conventional presses.The process of piling sheet extraction is the reversed order of the process described above. The piling rig then provides upward force on the press and hydraulic cylinder(s) to extract a pile.

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