METHOD OF CAST-IN-PLACE PILE MAKING Russian patent published in 2002 - IPC

FIELD: construction engineering. SUBSTANCE: method includes drilling of hole, supply of solidifying material into hole and initiation of high-voltage discharges in supplied solidifying material by working discharger with variation of pulse energy, motion of discharger in hole and formation of widened sections. Novelty consists in introduction of waterproof shell into hole prior to supply of solidifying material and its destruction under effect of high-voltage discharges. Pulse energy is not changed during passage of frost zone. EFFECT: increased load-carrying capacity cast-in-place piles, extended field of application, particularly, in sand ground with low moisture content. 5 dwg