METHOD TO ERECT BEARING UNDERGROUND BASE Russian patent published in 2013 - IPC E02D5/44 

FIELD: construction.

SUBSTANCE: method to erect a bearing underground base, including installation of a combination of bearing piles, differing by the fact that in the body of installed piles at one depth corresponding to the planned depth of the erected bearing base, electric discharge gaps are arranged, which are located near the wall of the piles shaft in areas of planned treatment of the piles shaft, afterwards, electric discharge is forcedly organised in electric discharge gaps by means of controlled supply of voltage to electric discharge gaps, which exceeds their breakthrough voltage, to form a zone of pile material discharge around each pile, with compacted soil particles included in it, at the same time pile parameters, distance between them and parameters of electric discharge gaps are selected based on the condition that the pressure at the pile wall arising in case of electric discharge gap breakthrough exceeds the pressure of soil deformation in the area of planned treatment of pile shaft and approach of adjacent piles discharge zones to form a solid bearing base at the specified horizon.

EFFECT: higher reliability of a bearing base for responsible underground structures, provides for accuracy of base strengthening performance.

6 cl, 3 dwg