PILE FOUNDATION Russian patent published in 1999 - IPC

FIELD: construction engineering. SUBSTANCE: this relates to pile foundations for buildings and structures erected on settling ground. Pile foundation includes floating piles and foundation mat. Foundation is provided with supports which are made in the form of consolidated masses of ground and they are located on natural or loose ground for interaction with lower ends of floating piles. Each support is made as double-step. Upper step which interacts with lower end of floating pile is of strength not less than 2.5 MPa, lower step of support is of strength not less than 0.25 MPa when wetted. Height of upper step of support is not less than 1.5 m and its diameter is not less than 3 times larger than diameter or width of larger side of floating pile. Lower step of support is of diameter which is 6 times larger than diameter or width of larger side of floating pile. Aforesaid arrangement of pile foundation with floating piles increases load-bearing capacity of foundation with simultaneous reduction of number of needed piles. EFFECT: higher efficiency. 4 cl, 1 dwg