RU2695577C1 - Method to increase bearing capacity of ice cover - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to ice-making and can be used to create an ice crossing for the transport of goods. Method consists in that the carrying capacity of the ice cover of the ferry is increased by means of steel pipes lowered vertically to the bottom of the basin through via holes formed in the ice cover on both edges of the crossing along its entire length, the bottom end of the pipe is made brewed, and its upper end protrudes above the ice surface. Pipes are made corrugated.

EFFECT: increased reliability of ice crossing operation is achieved due to provision of independence of its lifting capacity against fluctuations of water level in water reservoir.

1 cl, 2 dwg

Description

The invention relates to the field of ice engineering and can be used to create an ice ferry for transporting goods.

A technical solution is known (1. Kozin VM, RF Patent No. 2135685 of 08/27/1999), in which the method of creating an ice crossing consists in placing steel pipes under ice, dropped vertically to the bottom of the pool through the through holes formed in the ice cover on both the edges of the crossing along its entire length, with the bottom end of the pipes made brewed, and its upper end protruding above the ice surface. Cold air, as heavier, enters the pipes, causing ice to freeze over their entire outer surface. After a sufficient time has elapsed for reliable freezing of the lower and upper parts of the pipes to the bottom of the pool and the ice cover, respectively, and the ice layer of the required thickness freezes on the pipe surfaces, the ice crossing is ready for operation.

The disadvantage of this method is the danger of its use with significant fluctuations in the water level in the reservoir, which inevitably occur throughout the winter period. So, when the level rises, the bottom ends of the pipes can detach from the bottom, and when they fall, the ice cover itself can be destroyed in places where it freezes to the top of the pipe ends.

The objective of the claimed invention is the creation of an ice ferry, the bearing capacity of which would not depend on fluctuations in the water level in the reservoir.

The technical result achieved in solving the problem is to increase the degree of reliability of the operation of the ice crossing by creating an ice crossing, the bearing capacity of which does not depend on fluctuations in the water level in the reservoir.

The essential features characterizing the invention:

Restrictive: the load-bearing capacity of the ice cover is increased by means of steel pipes, lowered vertically to the bottom of the pool through the through holes formed in the ice cover on both edges of the crossing along its entire length, the bottom end of the pipe being welded and its upper end protruding above the ice surface.

Distinctive: the pipes are corrugated.

The method is as follows.

Rows of through holes are drilled in the ice sheet on both sides of the intended cargo transportation path. Corrugated pipes with welded bottom ends are vertically lowered through them under the ice and abutted to the bottom of the pool. The length of the pipes should be sufficient so that their upper end rises above the surface of the ice sheet. To prevent possible ascent of pipes, they are temporarily fixed. Then, the ice crossing thus prepared is subjected to negative temperatures. Cold, heavy air (t <0 ° C) enters the pipes, causing ice to freeze over their entire outer surface, i.e., the formation of peculiar ice piles (ice supports) under the ice sheet, which will certainly increase the strength of the ice crossing. After a sufficient time has passed for the ice layer of the required thickness h to freeze on the pipe surfaces, the ice ferry is ready for operation, but only for a given water level in the reservoir. Since this level, of course, will fluctuate during the entire period of freezing, then to eliminate the undesirable consequences of a change in the water level, i.e., the destruction of the supports, the pipes are corrugated.

A change in the water level at the place where the ice crossing was created will lead to a complex stress-strain state in the ice layers frozen on the pipes. When the water level rises in a pond, corrugated pipes, i.e. supports, will begin to stretch. Due to their strength reserves, cracking will begin, and then the destruction of some sections of ice piles will begin. After the cessation of the flood, due to the entry of cold atmospheric air into the pipes, the destroyed sections will “heal”, i.e. the integrity of the piles will be restored and the ice ferry will be ready for its further operation.

When the water level drops, the supports will begin to shrink, which will lead to similar results and consequences.

The invention is illustrated graphically, where: in FIG. 1 shows a general view of a crossing; in FIG. 2 is a section A-A in FIG. one.

In the ice sheet 1, on both sides of the intended cargo transportation path 2, rows of through holes 3 are drilled. Through them, pipes 4 with welded lower ends are vertically lowered under them and abut against the bottom of the pool 5 (Fig. 1), and the pipes 4 are corrugated (Fig. 2). On pipes 4, an ice layer 6 with thickness h freezes (Fig. 1, 2), after which the crossing is ready for operation.

Claims (1)

The method of increasing the bearing capacity of the ice cover by means of steel pipes lowered vertically to the bottom of the pool through the through holes formed in the ice cover on both edges of the crossing along its entire length, the bottom end of the pipes being welded and the upper end protruding above the ice surface, characterized in that the pipes are corrugated.

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