TELESCOPIC SCREW PILE WITH LEADER PILE Russian patent published in 2021 - IPC E02D5/56 E02D5/44 E02D5/48 

FIELD: construction.

SUBSTANCE: inventions relate to construction, can be used in industrial and civil construction when erecting pile foundations and foundations in soft soils, in cases where it is necessary to provide support on a load-bearing soil layer located at a considerable depth of occurrence. The telescopic screw pile includes a leader pile with a tapered tip at the end with helical blades and a shell pile inserted into each other with the ability to move along the length of the pile. After submersion, the upper end of the leader pile is rigidly connected to the head mounted on the shell pile, while at its lower end, above the tapered tip with helical blades, an expander is fixed. The expander is made in the form of a sleeve put on a rod. The lower end of the shell-pile has at least one sealing cone and a conductor, which is a guide sleeve for centering both parts of the pile during immersion. Moreover, the cone seal is arranged at the transition from the diameter of the conductor bushing to the diameter of the shell pile shaft, on which the helical blades are fixed.

EFFECT: increasing the bearing capacity of the pile.

12 cl, 13 dwg