KR20140048448A

KR20140048448A - Freezimg pipe

Info

Publication number: KR20140048448A
Application number: KR1020120114146A
Authority: KR
Inventors: 이홍규; 채종길; 문흥만; 최형철; 김영석; 홍승서
Original assignee: 두산건설 주식회사; 대성산업가스 주식회사
Priority date: 2012-10-15
Filing date: 2012-10-15
Publication date: 2014-04-24

Abstract

The present invention relates to a freezing pipe (100) for freezing the soil (10) is inserted into the excavation groove (20) of the soil (10), the lower part is closed, the outer tube formed with a refrigerant outlet (111) at the top 110; The refrigerant inlet 121 is formed at the upper end, and the refrigerant outlet 122 is formed at the lower end, and a plurality of inner tubes 120 installed inside the outer tube 110; and includes a plurality of inner tubes 120 Refrigerant outlet 122 of the) by presenting the freezing tube 100 having a different depth from each other, even if the depth of the freezing tube can be solved the problem of non-uniform freezing according to the temperature difference of the refrigerant in the upper portion.

Description

Freeze Tube {FREEZIMG PIPE}

The present invention relates to the field of civil engineering, and more particularly, to the structure of a freezing tube.

A freezing tube refers to a structure used in a method of cooling groundwater in soil in contact with it using a refrigerant.

Such a freeze tube is used for the stable sampling of soil samples, the construction of tunnels, and the construction of temporary earth walls.

The conventional freezing tube 100 is the main refrigerant 200 is injected into the inner tube 120 through the injection tube 121, and then flows back through the lower outlet 122 to the upper to the inside of the outer tube 110 While being discharged through the outlet 111 via the through, freezing the soil around the outer tube 110 takes a configuration to form the freezing section 11 (Fig. 1).

However, such a conventional freezing tube has the following problems.

It is common to use liquefied nitrogen as a refrigerant of the freezing tube, which is a very unstable condition having a boiling point of -196 ° C. There is this.

In some cases, the freezing tube may have a diameter of 1 m and a depth of 40 m. In this case, it takes a considerable amount of time for the refrigerant to reach the top through the bottom of the freezing tube, in which case the temperature of the refrigerant flowing into the freezing tube And the temperature of the refrigerant discharged from the freezing tube is very different.

That is, since the temperature difference between the upper and lower refrigerant occurs inside the freezing tube, there is a problem that the shape of the freezing portion 111 due to freezing of the soil is also formed non-uniformly in the vertical direction, the deeper the depth of the freezing tube, The problem is more serious (Figure 1).

In addition, when the continuous freezing unit is to be formed by the freezing tube 100 and the adjacent freezing tube 100a, the freezing unit 111 by the freezing tube 100 and the adjacent freezing unit by the adjacent freezing tube 100a ( There exists a problem that the area | region A in which freezing does not occur between 111a) arises (FIG. 2).

The present invention was derived to solve the above problems, to provide a freezing tube having a structure that can solve the problem of non-uniform freezing according to the temperature difference of the refrigerant in the upper portion even if the depth of the freezing tube is deep. For that purpose.

In order to solve the above problems, the present invention is inserted into the excavation groove 20 of the soil 10, in the freezing pipe 100 for freezing the soil 10, the lower portion is closed, the refrigerant outlet in the upper portion Outer tube 110 is formed 111; And a plurality of inner tubes 120 formed at an upper end thereof, a refrigerant outlet 122 formed at a lower end thereof, and a plurality of inner tubes 120 installed inside the outer tube 110. Refrigerant outlet 122 of 120 presents a freezing tube 100, characterized in that the depth is different from each other.

The plurality of inner tubes 120 are branched from the refrigerant supply pipe 30, and the plurality of inner tubes 120 have different lengths from each other.

The present invention is inserted into the excavation groove 20 of the soil 10, in the freezing tube 100 for freezing the soil 10, the lower portion is closed, the outer tube formed with a refrigerant outlet 111 in the upper portion 110; In addition, the refrigerant inlet 131 is formed at the top, and the inner central tube 130 installed inside the outer tube 110; And a plurality of internal branch tubes 140 branched downward from the inner central tube 130 and having a refrigerant outlet 142 formed at a lower end thereof, and including the refrigerant outlets 142 of the plurality of internal branch tubes 140. Presents together the freezing tube 100, characterized in that the depth is different from each other.

Preferably, the plurality of inner branch pipes 140 are different in length from each other.

The present invention is inserted into the excavation groove 20 of the soil 10, in the freezing tube 100 for freezing the soil 10, the lower portion is closed, the outer tube formed with a refrigerant outlet 111 in the upper portion 110; And a plurality of coolant inlets 151 formed at an upper end, a plurality of coolant outlets 152 formed at lower ends and sidewalls, and a plurality of inner tubes 150 installed in the outer tube 110. The plurality of refrigerant outlets 152 present together the freezing tube 100, characterized in that the depth is different from each other.

The present invention provides a freezing tube having a structure that can solve the problem of non-uniform freezing according to the temperature difference of the refrigerant in the lower part of the upper part even if the depth of the freezing tube is deep.

1 is a cross-sectional view of a conventional freezing tube.
3 shows the embodiment of the present invention,
3 is a cross-sectional view of the first embodiment.
4 is a sectional view of a second embodiment;
5 is a sectional view of a third embodiment;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown below in Figure 3, the present invention relates to the freezing pipe 100 for freezing the soil 10 is inserted into the excavation groove 20 of the soil 10, the lower portion is closed, the upper portion An outer tube 110 having a refrigerant outlet 111 formed therein; The coolant inlet 121 is formed at the upper end, the coolant outlet 122 is formed at the lower end, and a plurality of inner tubes 120 installed inside the outer tube 110.

Here, the refrigerant outlets 122 of the plurality of inner tubes 120 are characterized in that the depth is different from each other.

That is, it takes the structure of the conventional freezing tube basically, so that the depths of the refrigerant outlets 122a, 122b, 122c of the plurality of inner tubes 120a, 120b, 120c are different from each other (to discharge the refrigerant at different depths). )

In the related art, since a low-temperature refrigerant is intensively supplied only to the lower portion of the freezing tube 100, the upper portion of the freezing tube is only able to obtain a freezing effect due to a relatively high temperature refrigerant. Not only the lower part of 100, but also the central part and the upper part of the upper part of which keep the coolant, the non-uniform freezing can be prevented (Fig. 3).

Specifically, the plurality of inner pipes 120 are branched from one refrigerant supply pipe 30, the length of the plurality of inner pipes 120 may have a different structure from each other to obtain the above effect.

On the other hand, the freezing tube 100 according to the present invention, the lower portion is closed, the outer tube 110, the refrigerant outlet 111 is formed on the upper; In addition, the refrigerant inlet 131 is formed at the top, and the inner central tube 130 installed inside the outer tube 110; And a plurality of internal branch pipes 140 branching downward from the inner central pipe 130 and having a coolant outlet 142 formed at a lower end thereof, and the coolant outlets 142 of the plurality of inner branch pipes 140 are each other. It is also possible to take different configurations of depth (Fig. 4).

That is, the inner tube is composed of the inner central tube 130 and the plurality of inner branch pipes (140a, 140b, 140c), the depth of the refrigerant outlet (142a, 142b, 142c) of the inner branch pipes (140a, 140b, 140c) Are formed to be different from each other.

Even in the case of taking such a structure, as described above, there is an effect that the non-uniform freezing of the soil can be prevented.

In detail, the plurality of inner branch pipes 140 may have different lengths, thereby obtaining the above-described effects.

In addition, the freezing tube 100 according to the present invention, the lower portion is closed, the outer tube 110 is formed with a refrigerant outlet 111 in the upper portion; And a plurality of coolant inlets 151 formed at an upper end, a plurality of coolant outlets 152 formed at a lower end and sidewalls, and a plurality of inner tubes 150 installed inside the outer tube 110. The coolant outlets 152 may be implemented by configurations having different depths from each other (FIG. 5).

Even in this case, since the outflow of the coolant in the inner tubes 150a, 150b, and 150c occurs at the coolant outlets 152a, 152b and 152c of various depths, there is an effect that the non-uniform freezing of the soil can be prevented.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

10 soil 11 frozen part
100: freezing tube 110: outer tube
120: inner tube 130: inner central tube
140: internal branch pipe 150: inner pipe

Claims

In the freezing pipe 100 is inserted into the excavation groove 20 of the soil 10 to freeze the soil 10,
An outer tube 110 having a lower portion closed and a refrigerant outlet 111 formed at an upper portion thereof;
And a plurality of inner tubes 120 formed at an upper end thereof, a refrigerant outlet 122 formed at a lower end thereof, and installed inside the outer tube 110.
The refrigerant outlets 122 of the plurality of inner tubes 120 have different depths from each other.

The method of claim 1,
The plurality of inner tubes (120) branched from the refrigerant supply pipe (30), the plurality of inner tubes (120) freezing tube (100), characterized in that the length is different from each other.

In the freezing pipe 100 is inserted into the excavation groove 20 of the soil 10 to freeze the soil 10,
An outer tube 110 having a lower portion closed and a refrigerant outlet 111 formed at an upper portion thereof;
In addition, the refrigerant inlet 131 is formed at the top, and the inner central tube 130 installed inside the outer tube 110;
And a plurality of internal branch pipes 140 branched downward from the inner central pipe 130 and having a coolant outlet 142 formed at a lower end thereof.
The refrigerant outlets 142 of the plurality of internal branch pipes 140 are different from each other in the depth of the freezing pipe (100).

The method of claim 3,
The plurality of inner branch pipes (140), characterized in that the length is different from each other freezing tube (100).

In the freezing pipe 100 is inserted into the excavation groove 20 of the soil 10 to freeze the soil 10,
An outer tube 110 having a lower portion closed and a refrigerant outlet 111 formed at an upper portion thereof;
And a plurality of refrigerant pipes 151 formed at an upper end, a plurality of refrigerant outlets 152 formed at a lower end and sidewalls, and a plurality of inner pipes 150 installed inside the outer pipe 110.
The plurality of refrigerant outlets 152 have a depth different from each other, the freezing pipe (100).