METHOD AND DEVICE FOR BUILDING STRUCTURE PROTECTION AGAINST UNDERGROUND WATER Russian patent published in 2004 - IPC

FIELD: building industry, particularly for broken damp-proofing renewal during renovation of buildings, including historical buildings,. SUBSTANCE: method involves drilling orifices in wall; creating pressure field by means of ultrasound in the first Fresnel region generated by radio-frequency pulses with duration of 10 - 40 msec, power of 100-200 W, on-off time ratio of 5 - 30 and filling frequency of 20 - 70 kHertz, which are converted into ultrasound oscillations; introducing waterproofing agent into drilled orifices due to pressure field. Values of above parameter are determined by building structure dimensions and properties. Width of gap between converter active surface and vertical surface of building structure is 5 - 10 mm. Device has n piezoelectric converters. Each piezoelectric converter includes m piezoelectric cells connected in parallel and joined to matching members. Each converter is enclosed by absorbing screen, which may be formed of porous rubber. Device also has flat sensors for determining upper and lower levels of n spacer tubes having upper orifices, n electric valves, valve operation means, angle shelf, rest bar and two screw-type fixing members. Each converter is connected to one output of radio-frequency pulses switch. Radio-frequency pulses switch input is linked to radio-frequency pulses generator. Flat sensors are connected to valve operation means. Valve operation means outputs are joined to control terminals of valves. Valve inlet orifices are connected to vessel with waterproofing agent. Valve outlet orifices are connected to spacer tubes. Bottom converter surfaces are laid on horizontal surface of angle shelf such that active surfaces of converters are parallel to work surface. Spacer tubes are fixed along work surface for work gap creation. Two screw-type fixing members are connected by the first ends to shelf ridge and joined by the second ends to rest bar secured on horizontal surface. EFFECT: possibility of waterproofing agent introducing around structure periphery at the whole width of work material without mechanical effect. 3 cl, 6 dwg