METHOD FOR REDUCTION OF ICE PRESSURE AT HYDROTECHNICAL STRUCTURES Russian patent published in 2009 - IPC E02B15/02 

FIELD: construction.

SUBSTANCE: invention is related to the field of hydrotechnical structures operation and is intended for reduction of ice loads at hydrotechnical structures during spring ice motion. In period that precedes spring ice drifting, ice field is coated with tapes of elastic synthetic material of black colour with width that makes from 1 to 1.5 of average thickness of ice so that these tapes create fragments of uncoated ice inside in the form of rhombs, which are inverted with their sharp angle of 30 - 60° along with direction of river flow to the side of hydrotechnical structure site and size of largest rhomb side of not more than 1/3 - 1/4 of distance between intermediate supports. In order to increase light flux absorbed by tapes of black colour elastic synthetic material, parallel to then and behind them relative to sun, tapes of white colour elastic synthetic material are arranged on vertical frame made of, for instance wood or wire, at the distance from tapes lying on ice, which provides for reflected light ingress at black coloured tapes in midday astronomic for this area.

EFFECT: provides for prevention of ice piling and reduction of its load at intermediate supports of hydrotechnical structure during the first ice motion of spring ice drifting by increase of solar radiation energy absorption, which is achieved by means of absorption of both direct and reflected light flows, higher safety of works during ice passing and reduced operational costs.

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