I. Introduction
Hydraulic static pile driver is a new machine with which pre-fabricated piles are hydraulically jacked-in accurately into the ground. This machine works calmly and placidly using strong static pressure produced by high pressure oil. This machine has been used in many cities of China, especially in construction works associated to the development of the cities. This machine can effectively be used to mitigate the negative environmental impacts during these constructions. These machines rely on their self-weight to derive its reaction force, allowing square or circular pre-cast reinforced/pre-stressed concrete piles and H steel piles to be jacked into the ground to act as foundation piles. They are normally massive and often require a large flat working space at site.