DEVICE AND METHOD FOR FORMATION OF BROADENING IN BOREHOLE Russian patent published in 2018 - IPC E02D5/44 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, and in particular can be used in the construction of bored piles, including the widened heel. Device for forming the broadening in the borehole comprises a housing located in the central part of the borehole and a spacer mounted on the housing, configured to exert pressure on the walls of the borehole when the device is activated and the indentation is performed by indenting the soil. Contains one or more spacers in the form of a system configured to be activated by pressurized air pressure, or a hydraulic system, or from other force exciters, and with the possibility of extending the heel or the entire well. At the same time, the body is made in the form of a pipe, and the system of spacer devices contains jacks, mainly pneumatic jaws, or elastic-elastic elements in the form of air bags connected to a pressure supercharger.

EFFECT: technical result consists in increasing the efficiency of the formation of broadening in the well by facilitating and improving the design, shortening the work execution time, increasing the durability of the device, and expanding the field of application.

20 cl, 5 dwg