METHOD TO COLLAPSE SNOW EAVES ON AVALANCHE-PRONE SLOPES Russian patent published in 2013 - IPC E01F7/04 

FIELD: construction.

SUBSTANCE: according to the method, before collapse of snow eaves on avalanche-prone slopes by means of cutting of their cantilever part, according to preliminary results of observations carried out in winter period, eave-dangerous sections are detected on a ridge. In summer period on the ridge of every eave-dangerous section, near the ridge line on the windward area of the slope, a permanent scaling benchmark is installed, with the help of which then after every snowstorm the length of the cantilever part of the snow eave is measured. When the size of this part of the snow eave achieves the permissible limit value for this part of the ridge, the action is taken against the snow eave, and it is collapsed. When detecting length of the cantilever part of the snow eave, digital video filming or photomapping of the scaling benchmark is carried out on the background of the snow eave, and by ratio of their dimensions the sought for size of the cantilever part of the snow eave is determined. The permanent scaling benchmark is made in the form of a stand solidly mounted into rock soil on the top of the range, and a cantilever size ruler fixed to the stand, equipped with an appropriate measurement scale and directed towards the windward area of the slope. The stand to the level of the cantilever size ruler is also equipped with an appropriate scale for measurement of snow height directly on the range ridge.

EFFECT: improved accuracy of forecasting and efficiency and safety of anti-avalanche actions.

3 cl, 1 dwg