FIELD: civil engineering. SUBSTANCE: shell of pile foundation has circular cross-section, and a metal tip. The tip has a holder on the upper face. The holder is inserted in shell cavity. Shaft is of rectangular cross-section. Shaft diagonal equals shell internal diameter. The shell is inserted down to the depth not exceeding allowable foundation settlement. Then the shaft is inserted into the cavity up to the stop. The shaft and the tip are inserted down to design level. EFFECT: fast manufacturing the foundation. 4 dwg
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