RU141110U1 - SYSTEM OF TEMPERATURE STABILIZATION OF SOILS OF BASES OF BUILDINGS AND STRUCTURES - Google Patents

Abstract

1. The system of temperature stabilization of the soils of the foundations of buildings and structures, including seasonal-acting cooling devices, each of which contains an evaporation zone, along the edges of which there is a transport zone and a condensation zone, and is made in the form of a tubular section with the possibility of refueling with a coolant, while condensations are installed above the soil surface at an angle of 90 ° to the horizon and are equipped with heat exchangers, and evaporation zones are placed at the base of the structure parallel to each other with a slope of 10 ° to 0 ° to the longitudinal axis of the structure, characterized in that the evaporation zones are located in through holes drilled over the entire area of the structure, are taken out of the contour of the structure from two opposite sides into trenches oriented along the longitudinal axis of the structure, and connected to transport zones laid in trenches, and the free edges of the transport zones are connected to condensation zones collected in a bush on each of the mentioned sides, mounted on a supporting structure equipped with a platform for refueling and maintenance lev els devices, the heat shield is laid on the surface of the foundation soil, under the whole structure, immediately under the first floors etazha.2. The device according to claim 1, characterized in that the transport zones can have flexible inserts that allow you to change the angle of rotation when laying in trenches. The device according to claim 1, characterized in that the transport zones are laid in trenches under a layer of soil dumping. The device according to claim 1, characterized in that each evaporation zone contains a blank partition in the inner cavity in the central part.

Description

The proposed utility model relates to the field of construction, namely, devices for cooling and freezing soils and can be used in the construction of structures in areas of permafrost to increase the bearing capacity of soils.

The features of the foundations of structures composed of permafrost soils are determined by the specific climatic conditions in high latitude regions of the Far North. In winter, the air temperature there is quite low for a long time and often reaches minus 40 °. However, snow cover and low thermal conductivity of the soil do not allow it to freeze deeply and severely. In the summer season, frozen ground thaws, in addition, when deviating from the design mode of operation of heated buildings and structures, the process of thawing of frozen soils is more intense, and this creates the threat of deformation of the foundations and destruction of buildings and structures.

One of the ways to preserve the negative temperature of frozen bases under structures is the use of artificial freezing of thawed melt or cooling of frozen base soils using seasonal cooling units. Seasonally-active cooling devices in winter additionally cool frozen soil, and in summer they do not work. The use of such devices can significantly increase the bearing capacity of the foundations of structures and prevent the development of deformations of the bases in the summer.

Known cooling device for freezing soil (RU 120974 U1, IPC E02D 3/115, published April 26, 2012), containing cooling pipes arranged horizontally, parallel to each other, filled with low boiling liquid, heat-insulating dust over the cooling pipes and condenser heat exchangers, when the ends of the cooling pipes are bent upwards at 90 ° and protrude 1-2 m above the insulating bed with an individual condenser heat exchanger at the end of each cooling pipe, the lengths of the cooling pipes correspond to the length of the trans tailor the container, and if the configuration of the cooled foundation structures exceeds the length of the shipping container, increases the length of the cooling tubes by connecting their ends at the inside of a thermally conductive paste connecting casings.

A disadvantage of the known design is low maintainability, which leads to the need for redundancy of additional cooling pipes under the dumping, and this in turn reduces the reliability of the device. In addition, increasing the length of the cooling pipes by connecting them to the heat pipes complicates installation work.

Closest to the proposed one is the design of the bulk cooled base of structures (RU 33955 U1, IPC E02D 3/115, published November 20, 2003), containing soil filling with a thermal insulation layer located on it and cooling pipes placed inside it with condensation and evaporation zones, while the cooling pipes are airtight and consist of two sections, the first of which is located vertically or deviated from the vertical by no more than 30 °, and the second is inclined to the horizon at an angle of no more than 10 °. In the first section of the pipe on the inner wall below the ground, pockets are made to hold the condensate flowing down.

However, the known device does not have a sufficiently high thermal efficiency, since the thermal inertia of the filling ground frozen in winter may not be sufficient to maintain it in a solid state in summer. This disadvantage can be partially compensated by an increase in the number of cooling pipes in the device, however, this reduces reliability, since the number of active elements, such as cooling pipes, increases. In addition, as in the previous known device, during the backfilling of cooling devices with soil, the spatial strength of the system decreases, since pieces of the soil to be filled have a mechanical effect on the pipes, as a result of which the pipe axes are displaced relative to the design position. Condensers protruding above the soil surface clutter the area around the structure, which makes it difficult to maintain cooling devices, repair them, replace and monitor the cooling process.

The objective of the proposed technical solution is to increase the bearing capacity of the soil of the base due to the preservation of the natural structure of the soil, increase the strength and performance of the temperature stabilization system of soils, simplify construction and installation works.

The solution to this problem is achieved by the fact that in the temperature stabilization system of soils of the foundations of buildings and structures, including seasonal-acting cooling devices, each of which contains an evaporation zone, along the edges of which there is a transport zone and a condensation zone, and is made in the form of a tubular section, with the possibility of refueling with a coolant, condensation zones are installed above the soil surface at an angle of 90 ° to the horizontal and are equipped with heat exchangers, and evaporation zones are located at the base of the steam construction allele to each other, with a slope of 10 ° to 0 ° to the longitudinal axis of the structure. According to the utility model, evaporation zones are located in the soil of the base, in through holes drilled by the directional drilling method, over the entire area of the structure. The free ends of the evaporation zone are taken outside the structure contour from two opposite sides into trenches oriented along the longitudinal axis of the structure and are connected to transport zones that are laid in the mentioned trenches, and the free ends of the transport zones are connected to condensation zones collected in a bush from each of mentioned parties. In addition, each condenser bush is mounted on a supporting structure installed on piles, equipped with a platform for refueling cooling devices, servicing and monitoring the cooling process. The condensation zones collected in the bush allow you to free the area around the structure, which greatly facilitates the maintenance of cooling devices, repair or replacement. A heat shield is laid on the ground surface of the base, under the entire structure, directly under the floors of the first floor

Transport zones can have flexible inserts, which allows you to change the angle of rotation when laying them in trenches.

Transport zones laid in trenches are covered with a layer of soil dumping.

In addition, the evaporation zones of the cooling devices are provided in the inner cavity in the central part with a blank partition, which separates the flow of refrigerant and ensures optimal operation of the cooling devices.

The essence of the proposed utility model "System of temperature stabilization of soils of the foundations of buildings and structures" is illustrated by the drawings:

- in FIG. 1 schematically shows a system of temperature stabilization of soils of the foundations of buildings and structures, general view;

- in FIG. 2 schematically shows a system of temperature stabilization of soils of the foundations of buildings and structures in the context.

The system of temperature stabilization of the soils of the foundations of buildings and structures includes seasonal-acting cooling devices, each of which contains an evaporation zone 2, along the edges of which there is a transport zone 3 and a condensation zone 4, and is made in the form of a tubular section with the possibility of refueling with a coolant. Condensation zones 4 are installed above the soil surface at an angle of 90 ° to the horizon and are equipped with heat exchangers 5, and evaporation zones 2 are placed at the base 9 of structure 1 parallel to each other, with a slope of 10 ° to 0 ° to the longitudinal axis OO (Fig. 1) of the structure 1. According to the utility model, evaporation zones 2 are located in the soil of the base 9, in through holes drilled by the directional drilling method, over the entire area of the structure. The free ends of the evaporation zone are taken outside the structure contour from two opposite sides in the trenches (Fig. 2), oriented along the longitudinal axis OO of the structure 1, and are connected to the transport zones 3, which are laid in the mentioned trenches, and the free ends of the transport zones 3 are connected to condensation zones 4 collected in a bush (Fig. 1, 2) on each of the mentioned sides. Moreover, each bush is mounted on a supporting structure 6 mounted on piles, equipped with a platform 7 for refueling cooling devices, maintenance and monitoring of the cooling process. The condensation zones 3 collected in the bush allow you to free up the area around the structure, which greatly facilitates the maintenance of cooling devices, repair or replacement. Heat shield 8 is laid on the surface of the soil of the base 9, under the entire structure 1, directly under the floors of the first floor

Transport zones 3 can have flexible inserts, which allows you to change the angle of rotation when laying them in trenches.

The transport zones 3 laid in trenches are filled up with a layer of soil dumping.

In addition, the evaporation zones of 2 cooling devices are provided in the inner cavity in the central part with a blank partition (not shown), which separates the flow of refrigerant and ensures optimal operation of the cooling devices.

The system of temperature stabilization of the soil of the foundations of buildings and structures works as follows.

At the construction site outside the contour of the future structure 1, trenches are arranged on two opposite sides along the longitudinal axis of the O-O structure (Fig. 1) (Fig. 2). Piles are installed at the outer sides of both trenches, on which a supporting structure 6 for condensation zones and a service area 7 of cooling devices are mounted. Then, through the directional drilling method, in the base 9 under the entire structure contour, through holes are drilled with a slope of 10 ° to 0 ° to the longitudinal axis OO (Fig. 1) of structure 1, in which evaporation zones 2 are placed. Free edges of evaporation zones 2 are led into trenches. After that, transport zones 3 are laid in trenches and connected to evaporation zones 2, while the free edges of the transport zones are brought to the surface at the location of the supporting structure 6 with the service platform 7 and connected to the vertical condensation zones 4, which are then fixed to the supporting structures 6. After the installation of cooling devices is completed, trenches are covered with soil to the planning mark, and a heat shield 8 is laid on the soil of the base 9.

Upon reaching the required temperature difference of 6-8 degrees between the soil and the outside air, cooling devices are included in the work. The refrigerant charged with the cooling devices, under the influence of the temperature difference between the soil and the outside air, circulates inside the cooling devices and removes heat from the evaporation zones 2 to the condensation zones 4 equipped with heat exchangers 5, lowering the temperature of the soil of the base 9, as a result of which the ice-ground mass freezes in the soil (plate), increasing the bearing capacity of the soil base. After freezing the soil, a further decrease in its temperature occurs, which increases the length of time the soil is in a frozen state, since in summer the cooling devices do not work. The heat shield 8 laid on the ground of the base 9 prevents the thawing of the soil in the summer.

The proposed system of temperature stabilization of soils of the foundation of the structure can be used both before construction to increase the bearing capacity of soils, and during the operation of the structure to restore the roof of frozen soils.

The advantages of the proposed utility model are that the placement of evaporation zones at the base of the structure in through holes drilled by the directional drilling method greatly simplifies construction and installation works and allows you to preserve the natural structure of the soil, which significantly increases the bearing capacity of the base. In addition, the spatial strength of the system is preserved and the risk of damage to cooling devices during installation is minimized, which occurs during backfilling of a foundation pit as a result of mechanical action of pieces of soil to be applied to the pipes. In addition, condensation zones that are collected in a bush and fixed on a supporting structure equipped with a service platform release the area around the structure, which facilitates the maintenance of cooling devices, repairs or replacement and monitoring of the cooling process, which, in turn, increases the efficiency of the soil temperature stabilization system foundation of the structure.

Claims (4)

1. The system of temperature stabilization of the soils of the foundations of buildings and structures, including seasonal-acting cooling devices, each of which contains an evaporation zone, along the edges of which there is a transport zone and a condensation zone, and is made in the form of a tubular section with the possibility of refueling with a coolant, while condensations are installed above the soil surface at an angle of 90 ° to the horizon and are equipped with heat exchangers, and evaporation zones are placed at the base of the structure parallel to each other with a slope of 10 ° to 0 ° to the longitudinal axis of the structure, characterized in that the evaporation zones are located in through holes drilled over the entire area of the structure, are taken out of the contour of the structure from two opposite sides into trenches oriented along the longitudinal axis of the structure, and connected to transport zones laid in trenches, and the free edges of the transport zones are connected to condensation zones collected in a bush on each of the mentioned sides, mounted on a supporting structure equipped with a platform for refueling and maintenance lev els devices, the heat shield is laid on the foundation soil surface under the whole structure directly under the floor of the first floor. 2. The device according to claim 1, characterized in that the transport zones can have flexible inserts that allow you to change the angle of rotation when laying in trenches. 3. The device according to claim 1, characterized in that the transport zones are laid in trenches under a layer of soil dumping. 4. The device according to claim 1, characterized in that each evaporation zone contains a blank partition in the inner cavity in the central part.

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