CZ301560B6 - Device for stabilization of soil by freezing - Google Patents

Abstract

In the present invention, there is disclosed a device for stabilization of soil by freezing i.e. by bringing soil to a temperature lower than water solidification temperature, usually in places next to building objects, first of all soil of smaller bearing capacity formed usually by moist, waterlogged soil layers, wetlands, moorlands, particularly where there are roads, pillars especially bridge pillars, buildings and the like building objects. The device consists of at least one thermal tube (13) having at least a portion of its evaporation portion (14) arranged in soil to be stabilized (3), and/or the device can consists of at least one heat pump (7) of the soil-water system or of the soil-air system. The heat pump (7) has a primary circuit with an evaporator (6) and a secondary circuit with a condenser (10), wherein said primary circuit evaporator (6) of the heat pump (7) is hydraulically connected to at least one ground collector (1). At least a portion of said ground collector (1) is arranged in the soil (3) to be stabilized at a point next to a building object. Outlet branch (4) of the ground collector (1) is connected to the inlet (5) of the evaporator (6) of the heat pump (7) primary circuit while the return branch of the ground collector (1) is connected to the outlet (9) of the evaporator (6) of the heat pump (7) primary circuit.

Description

Equipment for solidification of soil by freezing

Area, jgshnikY

FIELD OF THE INVENTION The present invention relates to an apparatus for solidifying a soil by freezing it by bringing it to a temperature below the freezing point of water, usually at sites near buildings, in particular soils of lower bearing capacity, usually formed by wet, waterlogged soil layers. roadways, usually motorways, pillars, in particular bridges, buildings and similar structures, are or will be located.

BACKGROUND OF THE INVENTION Building structures constructed in places with insufficient bearing capacity of subsoil have so far usually had to be arranged on reinforced concrete slabs, mostly reinforced or on solid pillars, deeply embedded in the soil. When the foundations of the soil were solidified by freezing in their foundations, this was usually done by placing cooling tubes or appropriately shaped containers in frozen soil, which were connected to a separate cooling radiator 20 which forced the cooled cooling medium into their perimeter.

However, these methods of soil consolidation are relatively expensive. In the case of soil consolidation by freezing of cooling pipes arranged in the soil and connected to the cooling equipment, there are mainly large investment costs associated with the acquisition of the cooling equipment, as well as large operating costs due to the energy consumption to drive the cooling equipment. .

SUMMARY OF THE INVENTION

The aforementioned drawbacks are largely eliminated by the soil consolidation device according to the invention, characterized in that the device consists of at least one heat pipe, at least a part of the discharge portion of which is arranged in the reinforced soil, at the site of the building and / or at least one heat pump of the ground water system and / or the ground system

- air, the heat pump has a primary circuit with an evaporator and a secondary circuit with a condenser, the primary circuit of the heat pump being hydraulically connected to at least one ground collector, at least a part of which is arranged in reinforced soil at the site of the building; The collector is connected to the primary circuit heat pump inlet and the return line of the ground collector is connected to the primary circuit evaporator outlet of the heat pump.

In the solution according to the invention, it is not necessary to produce solid reinforced concrete foundation slabs or massive and deeply embedded concrete pillars for building structures arranged on a lower bearing capacity soil. No need for large earthworks, boreholes and overburden. This saves frame work, building material, especially concrete and reinforcing steel, and financial resources.

This saves considerable investment costs for the purchase of cooling equipment, saves the building dimensions that would be needed for the cooling equipment, saves material and energy on the operation and maintenance of the tuning equipment, especially when using thermal traps.

A heat pump is a very efficient, efficient, proven, industrially produced and economically efficient heat transfer device, in this case, for dissipating heat energy from the site of frozen soil at a building. The use of a heat pump saves operating costs, which is mainly due to lower energy consumption for the operation of the heat pump. The thermal energy from the secondary circuit with the heat pump condenser can be used to connect to heating systems such as residential, manufacturing administrative and agricultural buildings, greenhouses, swimming halls and other recreational and sports areas and areas, or to heat domestic hot water.

All these advantages are given by the summary of features of claim 1.

The heat pipe is an element that can be easily installed in the required spaces. It also allows for a suitable modification of its shape, especially with regard to the constructional design of the object whose surroundings it is to cool. A pillar, in particular a steel, is a structure which is able to form itself simultaneously a building element of an object and a heat pipe as part of a cooling system. The heat carrier - the pillar is located directly in the pillar cavity.

By directly using a part of the building structure to create a heat pipe, more efficient cooling of the soil in the immediate vicinity of the building, such as a pillar or pile, is achieved. Investment costs and materials are also saved.

The formation of a ground collector connected to the heat pump by a system of interconnected tubes filled with antifreeze liquid makes it possible to arrange the tubes in a shape that is most suitable in terms of the shape of the building and in the vicinity of the frozen earth.

The design of the ground collector with plastic and / or rubber hoses makes it even easier to assemble the hoses and arrange them in the desired shape in the frozen earth space and thus with respect to the shape of the building. Plastic and rubber hoses are relatively inexpensive. All this leads to a further reduction in the costs associated with the use of the solution according to the invention.

The use of conventional industrial refrigeration equipment, whose evaporator is arranged in the freeze-hardened soil of a building, such as industrial refrigeration equipment used in food production, in sports halls to create artificial ice surfaces, and the like, is particularly advantageous for proven, industrially produced high capacity refrigeration systems with a high intensity of cooling and freezing of the environment around the evaporator.

Obviously, for the purpose of freezing the soil according to the invention, it is also possible to use a combination of different types of cooling devices, i.e. heat pipes, heat pumps and conventional cooling devices.

BRIEF DESCRIPTION OF THE DRAWINGS 40

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in greater detail in the drawing, in which Fig. 1 shows a freeze-thawing device made of gravity heat pipe in cross-section, and Fig. 2 shows a freeze-thawing device made up of a ground-water heat pump with surface collector.

DETAILED DESCRIPTION OF THE INVENTION

The freeze-thickened soil consolidation device of FIG. 1 consists of a ground-based collector 1, 50 formed by meander-shaped pipes 2 located in the freeze-thickened soil 3. The ground collector outlet branch 4 is connected to the inlet 5 of the primary circuit of the heat pump system 7 of the ground-water system and the return branch 8 of the ground collector 1 is connected to the outlet 9 of the primary circuit of the heat pump

-2GB 301560 B6 ground-water system. The heat pump condenser 10 of the ground-water system 7 has a second outlet 11 and a second inlet 12 for connection to a selected thermal energy removal device.

The freeze-thickened soil reinforcement apparatus shown in FIG. 2 is formed by a heat pipe 13, the discharge portion 14 of which is arranged in the reinforced soil 3. The condensation section 15 of the heat pipe 13 is disposed in the cooling medium stream 17 and has cooling fins 16 on the outer surface. At the same time, the heat pipe 13 forms the supporting pillar 18 of the building structure. The capillary structure 19 of the heat pipe 13 is formed by a mesh 20 disposed on the inner wall 21 of the heat pipe 13. The inner space 22 of the heat pipe 13 is partially filled with the heat transfer substance 23.

The heat pipe 13 is of the gravity type.

Industrial applicability

The freeze-thawing device 3 can be used, in particular, in the location of the foundation structures of buildings located in places with reduced soil load-bearing capacity and where it would be unbearable and inappropriate to solidify the subsoil with solid concrete slabs and reinforced pillars.

The use of this device also seems to be suitable for temporarily consolidating the soil for the time required to carry out the necessary working operations.

Claims (5)

PATENT CLAIMS 1. Installations for the consolidation of soil by freezing, bringing it below a temperature 30 solidification of water, usually in places near buildings, especially soil with lower load capacity, usually formed by moist, waterlogged soil layers, wetlands, peat bogs, especially in places where roadways, usually highway type, pillars, especially bridges are located or located , buildings and similar building objects, characterized in that it consists of at least one heat pipe (13), at least a part of the heat-exchanging part (14) being arranged in the reinforced 35 at the site of the building and / or is formed by at least one heat pump (7) of the ground-water system and / or the ground-air system, the heat pump (7) having a primary circuit with an outlet (6) and a secondary circuit with a condenser (10), wherein at least one earth collector (1) is hydraulically connected to the primary circuit heat exchanger (7), at least a part of which is arranged in the reinforced soil (3) at the site of the building, 40 wherein the outlet branch (4) of the ground collector (1) is connected to the inlet (5) of the primary circuit of the heat pump (7) and the return branch of the ground collector (1) is connected to the outlet (9) of the primary (6) the heat pump circuit (7). Device according to claim 1, characterized in that the heat pipe (13) forms at least 45% of the structure of the building, preferably the pillar (18). Device according to claim 1 or 2, characterized in that the ground collector (1) consists of a system of interconnected tubes (2) filled with antifreeze liquid mixture. -3GB 301560 B6 Device according to claim 3, characterized in that the tubes (2) are formed by plastic and / or rubber hoses. Apparatus according to any one of claims 1 to 4, characterized in that it further comprises a cooling device having at least one stub body arranged in the reinforced soil (3) at a location adjacent to the building.