Pile driving method, especially for use in Amsterdam region, uses pile shaft with specific external diameter and strength sunk to minimum depth in bottom sand layer

摘要

The pile shaft has a maximum external diameter of 0.19 m and is preferably less than 0.16 m, excluding any protruding parts such as connecting muffs between the shaft sections. The pile shaft is made from a material able to give it a strength of at least 80 MPa. A pressure is applied to the pile so that it is sunk without the use of any hoisting device and without generating significant vibrations, pressing it through the soft upper layer, the first sand layer and an intermediate layer into the second sand layer. In this final layer the pile is sunk to a depth at which the cone value determined using probes is at least 22 MPa, and so that the maximum pile point resistance is greater than 19 MPa and the maximum friction resistance over at least 1 metre shaft length is at least 0.2 MPa. The pile is sunk to a depth of at least 18 metres below sea level.