SU1059050A1 - Method and apparatus for paperforming engineering work with ice - Google Patents

Abstract

1. A method of performing ice-engineering works, mainly at the bottom of a reservoir in a ditch preliminarily enclosed by an ice wall, characterized in that, in order to accelerate the work being performed and increase their efficiency, a closed ice wall is formed by using lowered to the bottom pontoons then, from the space bounded by the ice wall, water is pumped out, the settled ice cover of the reservoir is removed, and at the same time, the pit is covered with a protective coating, the soil is not frozen. § to the design mark, (L is placed in the building to be erected, watered and frozen in layers, after which they are installed, they are heat-hydraulically insulated, mechanically protected and the component equipment of the erected structure.

Description

2. Software method: P, 1, characterized in that, in order to increase the degree of freezing of the ice mass body, between the ponc onons and on the side of them, wells are drilled in these places, lowered containers of soft material, for example polyethylene, are lowered into them with a cooling medium, the natural circulation of which in them in wintertime creates additional freezing.

3. A device for performing ice-engineering works, preferably for creating a closed ice j wall, including a refrigeration unit

gat with coolants in the form of tubular coils, distinguished by the fact that, in order to accelerate the work performed and improve their efficiency, tubular coils are installed inside a submerged 01 x pond or hinged to the sides of the surface pontoons with the possibility of rotation, the hulls of the submersible pontoons are equipped with king-pins and ventilation valves, and the pontoons of both types are shaped; pipes, the upper ends of which are located at different heights, and the lower ones are attached to the coils.

FIELD OF THE INVENTION The invention relates to hydrotechnical construction, to its field of ice engineering. . A well-known method for performing technical works, including preliminary protection of the aquator by an ice wall 1. The disadvantage of this method is the low efficiency of ice-building works performed inside the ice wall from the ice cover. There is also known a method for performing ice engineering, mainly at the bottom of a reservoir, in a pit 2, which was previously reflected by the ice wall. The disadvantage of the known method is that the ice freezes from the bottom very slowly and when lowering the frozen area to the bottom of the pit, there is a risk of leakage of the formed cavity. and flooding it with water when piercing the ice wall or when filtering the soil beneath it ;. A device for creating an ice coating of surfaces is known, which includes a refrigeration unit with coolant in the form of a tubular;. Ip coils. A disadvantage of the known device is its inability to create a restrictive wall, cutting off a part of the reservoir, resulting in additional time and equipment for installation. The purpose of the invention is the acceleration of the completed works and the improvement of their effectiveness. The goal is achieved by the fact that the ice wall is formed with the help of pontoons with cooling carriers lowered to the bottom, and then the water is removed from the spaces bounded by the ice wall and the bottom of the reservoir is removed. the trench with a protective coating, remove the unfrozen soil with a protective coating to the design mark, put it into the construction to be erected, layer with water and freeze, after which install the heat hydraisol In addition, with the aim of increasing the degree of freezing of the ice mass, between the pontoons and on the side of them, wells are drilled in these places, low-pressure containers of soft material, for example polyethylene, are lowered into them. cooling medium, the natural circulation of which in them in wintertime creates additional freezing. Moreover, the tubular coils are installed inside the submerged pontoons or suspended on hinges to the sides i of the surface pontoon with the possibility of rotation. . . . In addition, the hulls of the submerged pontoons are equipped with Kingston. ,, valves - ventilation, and the pontoons of both types and I-shaped tubes, the upper ends of the co. Are located at different heights, and the lower ones are attached to the coils. FIG. 1 shows a plan of a structure with an ice wall around it) in FIG. 2 is a side view of the pontoons with tubular coils hinged on them pivotally external; in fig. 3 is a front view of the pontoons with tubular coils in FIG. 4 section immersed pontoons on

FIG. 5 - section of pontoons in the place of installation of T / -generated thermoelements.,

Around the trench 1 is placed a closed ice wall 2 and dams 3 ".

The closed ice wall 2 is formed with the help of pontoons 4 with coolants 5.

The pontoons 4 are alternately lowered to the bottom of the reservoir by ingesting water, freezing the water. inside, and then the seawater and the bottom of the reservoir by passing refrigerant through refrigerants 5. In winter, you can refuse to use the refrigerant and maintain the cold in the ice wall 2 by passing cold air through refrigerants 5.

The pontoons 4, which create a closed ice wall.2, can be made of two types: submersible pontoons, in the case of which coolants 5 are placed in the form of tubular coils connected to the refrigeration unit 6, with kingstones and ventilation valves on the case, and surface pontoons.

Brackets 7 with tubular hinges 8 are fixed on the surface pontoon at the ends around which the Hfig tubular coils rotate. 2), supported by longitudinal ribs 9 .. Tubular coils are connected to a refrigeration unit 6 with electric actuator 10 placed in superstructure 11. After installing the surface Pontoons 4 in place, tubular coils 8 are turned around the hinges, let the refrigerant through them and freeze the frozen ice wall 2,

In the process of performing bulk soil freezing, a device consisting of several pontoons 4 connected to each other, equipped with refrigerators and heating by common devices and tubular coils to pass the coolant or coolant through them, is promising.

in winter, there is no need for forced cooling of the internal cavity of the pontoon 4 by running coolant through pipes. Therefore, TL-shaped tubes are additionally built into the pontoons 4, the upper ends of which are located at different levels to create natural air pulling, and the lower ends are connected to the coils (Fig. 5). ;

Having created a closed ice wall 3, they pump out the water from the pit, the bottom of the pit close to the heat insulator; a protective coating, for example, polyurethane foam, and carried out;

There is a gradual sampling of unfrozen soil together with a polyurethane foam coating.

The soil extracted from the bottom of the pit 1 is used to create a dam 3 that bounds the moorings, and for other ice engineering structures being built.

Putting the soil, pour it with water and block to the desired height. As an example, let us consider the technological process of accelerated construction during one winter of a seaport on the eastern shore of the Yamal Peninsula near the existing village of Yoviy Port.

Before the onset of freeze-up, the pontoons 4 with tubular coils inside them are placed at the design sites and connected to each other. The pipe outlets are connected to each other with flexible pipes and inspected the cooling system in action. After this, the kingston and ventilation valves are opened in the pontoons and the pontoons are immersed on the bottom of the Ob Lip, forming a closed reservoir.

After freezing, the water from the closed reservoir is pumped out, causing the ice cover formed by this time to sink to the bottom.

I The ice is broken up into smaller pieces and removed, putting it into the body of the de-engineering structures.

Immediately after cleaning the ice, the bottom of the vbdema is covered with a heat insulating protective coating, protected from significant freezing. After that, the soil with a protective coating is chosen by one method or another up to design marks in the port harbor,

I part of it is placed in the body of streams and fencing dams, and part of the conveyors are dumped onto the territory adjacent to the port.

The soil that is laid into the body of hydraulic structures is watered into layers of ice and then the surface of these structures is covered with heat and water insulation and materials that protect these structures from mechanical damage, for example, with reinforced concrete slabs: or sheets of hard plastic.

As a result of applying the proposed method of work, the time required for the construction of the port (with reliable preparatory work) will be reduced from 5 years to 1-2 years. Accordingly, decreases

the complexity and cost of structures erected.

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Claims (3)

1. A method of performing ice-making operations, mainly at the bottom of a reservoir in a pit previously enclosed by an ice wall, characterized in that, in order to accelerate the work performed and increase the Efficiency, a closed ice wall is formed using pontoons with coolants lowered to the bottom, after which the space bounded by the ice wall, pump out water, remove the settled ice cover of the reservoir, at the same time close in these places dyokotlana with a protective coating, remove the unfrozen soil with a protective coating it to the design level, it is placed in the building to be erected, poly layers; vayut frozen water and then heat-set, its mechanical protection and hardware isooruzheniya erected. 2. Method πθ; · π.1 ', characterized in that, in order to increase the degree of freezing of the body of the ice massif, between the pontoons and their sides, they drill holes in these places, and airtight containers of soft material, for example polyethylene, are lowered into them cooling medium, the natural circulation of which in winter creates additional freezing in them. 3. A device for performing ice-technical works, mainly for creating a closed ice wall i, comprising a refrigeration unit 1 with refrigerant carriers in the form of tubular coils, characterized in that, in order to accelerate the work performed and increase their efficiency, tubular coils are installed inside the submersible pontoons or hinged to the sides of the surface pontoons with the possibility of rotation, while the body. loaded: the pontoons are equipped with kingstones and ventilation valves, and the pontoons of both types are JJ-shaped pipes, the upper ends of which are located at different heights, and the lower ones are attached to the coils.