METHOD FOR CONSTRUCTION OF REINFORCED ICE CROSSINGS Russian patent published in 2023 - IPC F25C1/12 E02B17/00 E01D15/14 

FIELD: construction industry.

SUBSTANCE: invention relates to the field of construction of artificially constructed ice crossings in the Arctic and in the Far North. The method includes the implementation of successive alternating fillings of layers of pure artificial ice using a nozzle that provides a laminar flow of the liquid jet at the outlet, as well as composite layers reinforced with pre-cyclically evacuated cottonized fiber in water. The construction of the crossing begins in natural conditions at air temperatures below minus 5°C and when the ice at the crossing reaches a thickness of 7 cm sufficient for a person to safely enter the ice. The ice is cleared of snow, after which the layer-by-layer freezing of the rough ice substructure with a thickness of 10…15 mm is carried out from pure ice by pouring layers of water with a temperature from 5°C to 10°C and a thickness of the poured layer of no more than 4 mm. To fill the water layers during the freezing of artificial ice, a nozzle with a nozzle end cut at an angle from 20° to 35° is used, forming a laminar fluid flow at the outlet with a maximum allowable water flow rate of no more than 1.5 m/s. In the nozzle structure, at a distance of 25…30 cm in front of the outlet, there is an array of thin-walled tubes with an outer diameter of 3.5 mm and a length of at least 20 cm, and even earlier, a fine-mesh plastic net. Preliminary preparation of cottonized fiber before placing on the surface of the crossing is carried out in vacuum chambers, for this purpose cottonized fiber is placed in cuvettes, filled with a layer of water on top and subjected to a cyclic vacuuming process. It is permissible to reinforce only those areas of the ice crossing where tensile stresses will be present during its operation.

EFFECT: increase in the strength of the ice cover and extended permissible service life of an environmentally friendly ice crossing by significantly reducing the amount of air in the volume of artificial ice and its reinforcement with the use of a natural environmentally friendly material previously evacuated in water: flax fiber (cottonized fiber).

7 cl. 4 dwg