Patent RU-2715775-C1 (RU)
Title: Foundation reinforcement method and device for its implementation
Inventor: POLISHCHUK ANATOLIJ IVANOVICH
IPC: E02D27/08
Filed: 2019-06-04
Granted: 2020-03-03
Abstract: FIELD: construction. 
     SUBSTANCE: invention relates to construction, namely to reinforcement of foundations of buildings and structures, and can be used in their repair and reconstruction. Method of reinforcement of foundation includes installation of reinforcement units on opposite sides of foundation. Around the foundation with mechanical means soil base is developed to the level below foundation foot at depth equal to thickness of ledge step ledge at an angle α to the horizon, wherein an additional cavity is formed under the entire bottom of the base with width equal to the length L of the reinforcement block L, at an angle α to base sole and lateral part of reinforcement unit ledge is rounded along radius R 1 , equal to thickness of side part of ledge, with center lying on extension of reinforcement ledge base and located at an angle α to horizon equal to angle β, which in its turn is equal to arctangent of ratio of length L of ledger portion ledge to foundation height. Lower and upper parts of reinforcement block ledge are made with radius R 2  and R 3 . Thereafter, reinforcement units are arranged around said foundation, said reinforcement units being arranged to support rounded lower part of ledge with radius R 2  on designed at an angle α to the horizon the soil of the base with the upper part of the reinforcement unit resting on the top of the upper corner of the upper part of the foundation. Then, to the upper part of the amplification units and on both sides of the column, two torsion-thrust devices with attachment screws are fixed, which are screwed into dents, pre-made on the surface of the column or sub-column, wherein the surface of the recesses of the reinforcement units and the side surfaces of the foundation are coated with a layer of mortar and then by rotation of the tightening screws-threaded couplers of the device for implementing the method of reinforcing the foundation, as well as torsions of torsion-thrust devices, the reinforcement units rotate about the torsion axis in a vertical position parallel to the side walls of the foundation, wherein the reinforcement block ledges enter the additional cavity under the base of the existing foundation, and the solution layer contributes not only to uniform distribution throughout the bench area of the unit of amplification of transmitted forces from the foundation to the reinforcement units and from them to the base soil, but also to strong attachment of the reinforcement units to the side walls of the existing foundation. After attachment of compressed reinforcement units and existing foundation backfilling of soil around existing foundation with seal, and after hardening of solution layer dismantling (separation) of torsion-thrust devices from reinforcement units rigidly attached to foundation is performed. 
     EFFECT: technical result consists in improvement of efficiency of reinforcement of foundation, providing expansion of technological capabilities and simplification of method of reinforcement of foundation. 
     2 cl, 9 dwg