US 12,305,349 B2
Lifting and repairing foundations
Bahman Niroumand, Bushehr (IR); and Kimiya Niroumand, Bushehr (IR)
Filed by Bahman Niroumand, Bushehr (IR); and Kimiya Niroumand, Bushehr (IR)
Filed on Apr. 29, 2023, as Appl. No. 18/309,790.
Claims priority of provisional application 63/337,103, filed on May 1, 2022.
Prior Publication US 2023/0265638 A1, Aug. 24, 2023
Int. Cl. E02D 35/00 (2006.01)
CPC E02D 35/005 (2013.01) [E02D 2250/003 (2013.01); E02D 2300/0023 (2013.01); E02D 2300/0079 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for lifting and repairing a foundation, comprising:
digging a well below at least one lateral surface of the foundation, at least one third of an opening of the well being covered by a part of the foundation;
installing a shear plate to the at least one lateral surface of the foundation inside the opening of the well;
further digging the well to a maximum depth of 6 m;
compacting a bottom surface of the well at the maximum depth of 6 m by dynamic hammering the bottom surface of the well;
forming a layer of gravel by pouring a first plurality of gravel particles inside the well;
compacting the layer of the gravel by dynamic hammering the layer of the gravel;
placing a double column inside the well, the double column being fixed to the shear plate;
pouring a second plurality of gravel particles into the well, the second plurality of gravel particles filling around the double column in the well;
forming a cemented gravel layer by injecting a first amount of cement slurry into the well to fill empty spaces among the second plurality of gravel particles;
installing a tensile system on top of the double column, the tensile system being fixed on the shear plate;
forming at least a vacant space between the foundation and ground by lifting the foundation from the ground using the tensile system; and
fixing the foundation by injecting a second amount of cement slurry into the vacant space.