METHOD TO ELIMINATE STRUCTURE INCLINATION WITH THE USE OF REACTIVE BUTTRESSES Russian patent published in 2007 - IPC E02D35/00 E02D37/00 

FIELD: foundation construction, particularly to built structures on non-uniformly collapsible soil in karst developing zones, namely to erect chimneys, ventiduct, water towers and similar high structures.

SUBSTANCE: method is adapted to eliminate increasing structure inclination resulting from growing non-uniform ground base settlement, which causes vertical deviation of structure center of gravity, appearance of structure mass eccentricity, as well as formation and increase of tilting moment M_t, which results in plastic ground segment sliding along with foundation displacement over cylindrical slickenside. Method involves providing geodesic leveling of the structure; determining structure inclination angle and direction equal to foundation inclination; adhering targets provided with reference grids in characteristic foundation points; directing beam generated by laser leveling instrument or laser aiming device at each target so that beam end concur with coordinate origin; mounting steel reactive buttresses provided with nozzles connected to buttress bases; connecting suction dredge inlet flange of each nozzle to inject plasticized working agent into nozzles; pivotally connecting head of each reactive buttress with massive structure; switching-on suction dredges of reactive buttresses; injecting plasticized working agent into nozzles in pulsed mode and creating reversal moment M_r, which compensates tilting moment M_t; providing plastic shift under foundation base; creating plastic hinge; providing ground segment sliding along with foundation base over cylindrical surface about slip arch center O in opposite direction due to reversal moment M_r application; causing shift of plastic hinge of ground over cylindrical slickenside sliding along with foundation about slip arch center O and gradually eliminating structure inclination; controlling inclination decrease from spots of reflected laser beam moving over target reference grids; correcting inclination decrease; selectively switching-on suction dredges and fully eliminating structure inclination; switching-off suction dredges to liquidate hinge in ground segment under foundation base and fixing structure in design position.

EFFECT: provision of structure inclination and possibility to retain structure in design position.

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