Device for hardening ice crossing

FIELD: construction.

SUBSTANCE: device comprises the ice crossing in which the holes are made throughout the intended route of cargo transportation on its both sides, through which the reinforced concrete units are lowered under ice by means of cables. Discs are fixed to the upper ends of cables. The length of cables is selected in such a way that the ice doesn't rise above the initial position relative to the bottom when flexural-gravity waves occur. The distance between the openings along the crossing is equal to the length of resonant flexural-gravity waves λp. The discs are also installed in the middle between them at a distance from them equal to λp/2, under the ice. On either sides of the crossing all disks are rigidly connected with strong horizontal beams by means of racks.

EFFECT: hardening of ice crossing.

2 dwg


The invention relates to the field of hladotehnika and can be used in the operation of the ice sheet as ice crossings.

Known technical solution (1. EN 2281357 C1 from 10.06.2006. Bul. No. 22), namely that the ice all along the intended path of transport of goods by both sides in the ice is a through vertical hole through the ice using ropes lowered concrete blocks, to the upper ends of the cables attached disks with a diameter greater than the diameters of the holes, the length of cables are selected in such a way that in case of Flexural-gravity waves (VVM) the ice was not raised on the initial position relative to the bottom on the tops of the VVM.

The disadvantage of this solution is the impossibility of ensuring the lowering of the ice on the initial position relative to the bottom on the soles of VVM.

The objective of the claimed invention is to reduce the intensity of the VVM that occur in the ice cover from moving on his load.

The technical result achieved when solving the tasks, is to increase the strength of the ice crossing and its degree of reliability.

The essential features characterizing the invention.

Restrictive: a device for hardening ice crossings, including ice p�shelter, where all along the intended path of transportation of cargo on both sides provided with holes through which the ice using ropes lowered concrete blocks, to the upper ends of the cables attached to the drives, thus the length of cables are selected in such a way that in case of Flexural-gravity waves, the ice was not raised on the initial position relative to the bottom.

Distinctive: the distance between the holes along the crossing equal to the length of the resonant Flexural-gravity waves λpin the middle between them, i.e. at a distance from them equal to the λp/2, the ice also have wheels, on one and other sides of the crossing all the disks with the help of the uprights are rigidly connected with sturdy horizontal beams.

It is known (2. Kozin V. M. Resonance method of destruction of ice cover. Inventions and experiments. / M.: Publishing house "Academy of natural Sciences. 2007. - 355 p.) that when moving loads on ice cover in it there are a VVM. When the speed of the load that is coincident with the minimum phase speed VVM, i.e. with the resonant speed, the ice will begin to spread resonance VVM length λptheir amplitude increases dramatically and the ice starts to collapse at loads significantly less static.

To reduce the intensity, i.e. the height of the VVM, SCR�diffuses from the height of the ridge and the depth of the depression VVM, it is proposed to use the proposed device, not allowing the ice sheet to move up and down relative to its initial, i.e., before the movement of the load, position, thus to reduce its deformation, bending stresses and thus improve the strength of the ice crossing.

The device and its working principle is as follows.

First, depending on the conditions of ice (young's modulus of ice E, the depth of the waters H and sufficient to ensure the strength of the thickness of the ice h under static loads) determine the length of the resonant VVM; where- cylindrical stiffness of the ice plate; µ is the Poisson's ratio, ρl- the density of ice, g is the acceleration of gravity (3. Hasin D. E. Dynamics of the ice cover. Leningrad: Gidrometeoizdat. - 1967. 215 p.). Found the value of h necessary to provide a margin of safety of the ice cover when driving load on it, including with the resonant velocities[2], [3]. To do this, the ice all along the intended path of transportation of cargo on both sides drilled through vertical rows of holes at a distance from each other equal to the λp. Through them under the ice at the bottom of the pool is lowered, for example, glands�concrete blocks with attached cables, to the upper ends of which are attached steel discs with a diameter greater than the diameter of the holes. Length of cables are selected so as to prevent VVM ice was visible on the original, i.e., before the movement of the load position. All of the drives at one side and the other terminal using the struts are rigidly connected to horizontal beams. Midway between the holes, i.e. at a distance from them equal to the λp/2, the ice also have wheels, which are also rigidly connected with horizontal beams. These hard disks and their connection with sturdy horizontal beams, the ice will not drop relative to its initial position. Arisen in the ice VVM from the traffic load at their distribution in the device will be repaid since it will not allow the ice sheet to move up and down, i.e. to make the wave motion occurs in the cables tensile stress when the ice starts to rise relative to their initial positions. Despite the frequency of operation of the device, it will be more efficient quenching of the VVM in comparison with the prototype, because the development of oscillations of the ice and the excitement VVM maximum height (intensity) required significantly more time than the period of VVM, excited by the moving load, i.e. the time of passage of the ox�Oh distance equal λp[2]. After freezing of the water in the drill hole crossing is ready for operation.

The invention is illustrated graphically, where: Fig. 1 shows a diagram of a General view of the device; Fig. 2 - section A-A in Fig. 1.

The ice 1 on all the way of transportation 2 (Fig. 1) on both sides of drilled holes 3 spaced apart from each other by λp. Through them under the ice at the bottom of the pool 4 omitted 5 cables with concrete blocks 6. To the upper ends of the cables 5 attached steel wheels 7 (Fig. 1, 2). Between holes 3 drilled holes 8, through which at a distance of λp/2 drive 7 under the ice have wheels 9 (Fig. 2). All of the disks 7 and 9 on the one side and the other terminal with the help of racks 10 are rigidly connected with sturdy horizontal beams 11 (Fig. 1, 2). The device starts to work when the cables 5 tensile stress, i.e. it does not allow NTV 12 to develop in the ice cover 1 (Fig. 2), which ensures the achievement of the claimed technical result.

Device for hardening ice crossings, including ice cover, which all along the intended path of transportation of cargo on both sides provided with holes through which the ice using ropes lowered concrete blocks, to the upper ends of the cables attached to the clinic for�s drives the length of cables are selected in such a way that in case of Flexural-gravity waves, the ice was not raised on the initial position relative to the bottom, characterized in that the distance between the holes along the crossing equal to the length of the resonant Flexural-gravity waves λpin the middle between them, i.e. at a distance from them equal to the λp/2, the ice also have wheels, on one and other sides of the crossing all the disks with the help of the uprights are rigidly connected with sturdy horizontal beams.


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