KR20200025516A - Vertical Closed Ground Heat Exchanger with Color Alert Grouting Section and Method for constructing this same - Google Patents

Abstract

The present invention relates to a vertical closed ground heat exchanger having a color alert grouting section and a construction method thereof. The purpose of the present invention is to install excavate a ground heat hole according to a civil engineering excavation line even before civil engineering work and during a civil engineering work preparation period regardless of the civil engineering work if the civil engineering excavation line in a building site is determined when a ground heat hole is bored in the building site. According to the present invention, the vertical closed ground heat exchanger having a color alert grouting section comprises: a ground heat hole (1) formed from the ground to a design depth passing the civil engineering excavation line; a heat exchange coil (10) having an upper end connected to a supply system and a return system of a ground heat exchange system; first and second finishing T members (20, 30) formed to be closed at upper ends of the heat exchange coil (10); a color liquid injection pipe (40) connected to an upper-end head portion, having an upper portion disposed on the ground, receiving colored liquid of a color different from that of a grouting material, injecting the same into the ground heat hole, and having gradations; and a grouting pillar (50) formed in the ground heat hole through injection of the grouting material. The upper-end head portion is disposed higher than the civil engineering excavation line. The vertical closed ground heat exchanger injects the colored liquid through the colored liquid injection pipe before curing of the grouting pillar to form a color alert section around the upper-end head portion, thereby guiding excavation work.

Description

Vertical Closed Ground Heat Exchanger with Color Alert Grouting Section and Method for constructing this same}

The present invention relates to an underground heat exchanger, and more particularly, in the case of geothermal construction in a construction site, if a schedule for the construction of a construction site is determined, regardless of the construction work, it is expected to be excavated before and during the construction work. The present invention relates to a vertically sealed underground heat exchanger having a color warning grouting section for excavating a geothermal hole in line and installing a geothermal heat exchanger, and a construction method thereof.

This section provides background information related to the present application but is not necessarily prior art.

In case of constructing geothermal hole inside the building site for the construction of geothermal system, it was inevitable that the civil engineering work of the foundation was completed to prevent the damage of geothermal hole. This is because, in the case of civil engineering and geothermal construction at the same time, it is impossible to confirm the location of geothermal engineering and also confirm the location of geothermal construction. Various contaminants in the geothermal construction under construction (materials, debris, earth and sand, etc. generated during civil construction) Because it penetrates. Especially in the case of vertical sealed type, there are many excavation labors, so it works together with civil engineering works, but excavates the geothermal holes following the section where the civil works are completed. For this reason, it was difficult to control the quality of the geothermal construction under the condition that is frequently encouraged to finish. In the case of the open type, the excavation depth is about 500m deep, and the excavation time is long, and the construction time is increased due to the geothermal excavation, which is a factor that increases the construction cost.

Therefore, there was a need for the development of technology to install geothermal excavation and geothermal heat exchanger during the civil engineering preparation period, that is, before civil engineering work.

On the other hand, the vertically sealed or open underground heat exchanger is extended to the center of the city, and after drilling in a narrow building site, the drilling excavator is lowered to the bottom of the final trench depth. There is a lot of inconvenience to lift to the ground by using.

In this process, there is a lot of interference with civil engineering works, and this situation leads to an increase in the cost of construction due to a long construction period.

Furthermore, in the process of putting heavy load drilling rigs and manpower deep into the basement where civil works are completed, a lot of safety management costs are put in preparation for safety accidents of workers, and moreover, in geothermal excavation process There is a problem in that a lot of time and money is also generated in the process of lifting and discarding the excavated slime coming out to the ground.

In order to solve this problem, the preceding patents are as follows.

In the case of the registered patent No. 10-1525431 (borehole drilling method before digging using the separated joint material), and the registered patent No. 10-1621751 (method of inserting the ground heat exchanger before digging the guide), the heat exchange coil pipe close to the excavation surface After completion of the cutting and hydraulic test, after the insertion is completed in the heat-sealed closed state, the support pipe in the upper part is drawn out to be removed, but at the time when grouting is completed, it is not marked with a numerical marking that can accurately measure the insertion depth. It is difficult to check whether the heat-sealed head portion is located above or below the final drilling surface.

Furthermore, in the process of drawing out and removing the inserted support pipe, there is a problem that the insertion depth of the heat welding head may be remarkably deviated from the originally planned depth.

In the process of excavation during the excavation during the excavation during the construction work, if the overheated geothermal tubes are generated during the blasting process, there is no protective device that can protect the geothermal tubes. There is a problem such as the case that the geothermal tube is broken in the process of working by adding an excavator to remove the rock piece.

Patent Registration No. 10-1525431 Patent Registration No. 10-1621751

The present invention is to solve the problems as described above, when geothermal construction in the construction site, if the civil engineering work schedule of the construction site is determined, irrespective of the civil engineering work before and during the civil engineering work and excavation The purpose of the present invention is to provide a vertically sealed underground heat exchanger having a color warning grouting section at a precise depth while installing a geothermal hole in accordance with the schedule and installing a geothermal heat exchanger.

The vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention comprises: a geothermal hole formed from the ground to a design depth passing through a civil engineering excavation line; A heat exchange coil having an upper end connected to a supply system and a return system of the geothermal heat exchange system; An upper head part sealed to an upper end of the heat exchange coil pipe; A color liquid injection tube connected to the upper head and having an upper portion disposed on the ground and receiving a color liquid different from grout material and injecting the colored liquid into the geothermal hole; It includes a grouting column formed in the geothermal hole through the injection of the grout material, the upper head portion is disposed higher than the civil engineering excavation line, injecting the color liquid through the color liquid injection tube before curing of the grouting pillar It is characterized by guiding the excavation work by forming a color warning section around the upper head.

According to the vertical hermetically sealed underground heat exchanger having a color warning grouting section and a construction method thereof according to the present invention, the heat exchange coil tube is installed at a precise depth in accordance with the excavation schedule of the civil construction when installing the underground heat exchanger and the underground heat exchanger prior to the civil engineering work. It is effective to prevent damage of underground heat exchanger by installing color warning section with grout material that is installed and grouted inside geothermal hole and easy-to-identify color liquid, so that excavation workers pay attention when excavating in civil engineering work. In addition, the installation depth of the upper head part is prevented from changing so that the underground heat exchange system can be installed after the excavation of civil works without additional excavation work, thereby greatly reducing the construction cost.

1 is a cross-sectional view of a construction state of a vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention.
Figure 2 is a construction process of the vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention.
3 is a perspective view of a heat exchange coil tube and a color liquid injection tube applied to a vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention;
Figure 4 is an exploded perspective view of the heat exchange coil tube and the first finishing tea and color liquid injection tube applied to the vertical hermetic underground heat exchanger having a color warning grouting interval according to the present invention.
Figure 5 is a cross-sectional view of the first finishing tea applied to the vertical hermetic underground heat exchanger having a color warning grouting interval according to the present invention.
Figure 6 is a perspective view of the first finishing tea and color fluid injection tube applied to the vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention.
7 is a view showing that the vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention after civil works.
8 is a view showing an example of applying a protective tube to a vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention after the civil works.
9 shows a test operation for the operation of a vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention.
10 is a plan view showing a warning display band applied to the vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention.
Figure 11 and Figure 12 is another exemplary view of the color injection pipe applied to the vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

As shown in FIG. 1, the vertical hermetic underground heat exchanger 100 having a color warning grouting section according to the present invention includes a geothermal hole 1 and two openings connected to a supply side and a return side of the geothermal system. Heat exchange coil tube 10 is inserted into the geothermal hole, the first and second closures (20, 30), respectively, coupled to the two openings of the heat exchange coil tube and the supply side and the return side, respectively, the first closure (20) {can also be the second dead tea 30} is connected to the upper portion of the ground and the color liquid supplied from the ground color feeder 200 around the first and second dead teas (20,30) It is composed of a grouting column 50 formed by the injection and curing of the grout material in the color liquid injection tube 40, the geothermal hole (1) to be injected.

Also included is a casing 2 for preventing collapse of the geothermal holes 1.

In addition, when the grouting material is injected through the grouting hose 51 after the heat exchange coil pipe 10 is inserted into the geothermal hole 1 in a state in which water pressure is applied to the heat exchange coil pipe 10, the hydraulic pressure will be released. In this case, due to the load and pressure of the grouting material, the heat exchange coil pipe 10 may be stented, and thus, the pressure sensor 70 may check whether the heat exchange coil pipe 10 is maintained at a constant pressure after the construction process and the construction. ). The pressure sensed by the pressure sensor 70 is transmitted to the measuring instrument 72 that can be seen from the ground through the signal line 71 is guided to the operator. Although the pressure sensor 70 is illustrated as being installed in the second finishing tea 30 in the drawing, the present invention is not limited thereto, and a free position can be selected.

The geothermal hole (1) is drilled before civil engineering work, and thus from the ground to the planned depth through the excavation schedule.

The heat exchange coil pipe 10 has a structure in which the supply part 11 and the return part 12 are arranged vertically side by side in parallel to the hermetic underground heat exchanger while the bottom part is connected (such as a U band), and the supply part 11 and the return part ( 12 are connected to be spaced from each other via one or more connecting parts 13. In addition, in order to prevent deep floating in the geothermal hole (1) due to the material having a low specific gravity in the process of being installed to a deep depth can be installed by combining a separate load-added body (14). The load addition body 14 can also use the connection part 13 together.

The heat exchange coil tube 10 has a length at which the upper end is disposed higher (for example, 1 m higher) than the civil engineering excavation line, because the first, connected to the heat exchange coil tube 10 without additional excavation after excavation of the civil construction, This is because the supply system (supply pipe) and the return system (return pipe) should be connected to the two marzipi (20, 30).

As shown in FIGS. 1 and 3, the first and second finishing teas 20 and 30 are coupled to the upper end of the supply portion 11 and the return portion 12 of the heat exchange coil tube 10. 10) depends on the material} by sealing the inside of the heat exchange coil pipe 10 to prevent contamination during grouting and excavation of civil engineering.

The first and second finishing teas 20 and 30 are provided with a space communicating with the supply part 11 and the return part 12 of the heat exchange coil tube 10. The first and second finishing teas 20 and 30 do not necessarily mean the T-shaped pipes, but also include a straight socket when only two flow path directions are required. On the other hand, the first and second connecting portions 21 and 31, which are connected to the supply system and the return system, for example, protrude on the outer circumferential surface so as to communicate with the inside, and, of course, the first and second connecting portions 21 and 31 are first and second. It is opened and closed via stoppers 22 and 32. The first and second stoppers 22 and 32 are separated when the supply system and the return system are connected.

The first and second connecting portions 21 and 31 have a screw line formed on an inner circumferential surface thereof, and the first and second plugs 22 and 32 have a bolt shape that is screwed to the screw line. Of course, the same effect can be realized through heat welding without a thread.

The bottoms of the first and second finishing teas 20 and 30 are connected to the upper ends of the supply part 11 and the return part 12 of the heat exchange coil tube 10, respectively, by fusion or the like.

The first and second finishing teas 20 and 30 may be united to be connected to each other through the connection part 33.

The first and second finishing teas 20 and 30 may be configured to have different heights of the first and second connecting parts 21 and 31 for easy connection of the supply system and the return system.

The first and second finishing teas 20 and 30 may be integrally formed with the heat exchange coil pipe 10.

That is, the heat exchange coil tube 10 is an upper end portion is a closed type and includes a top head portion that can be connected to the supply system and the return system, the first and second finishing tea (20, 30) is the upper head portion.

The second finishing tea 30 has the same structure as the first finishing tea 20 and is provided with a blocking plate 33.

1, 2, 4 and 5, the first finishing tea 20 has a structure in which the color fluid injection tube 40 is connected, so unlike the second finishing tea 30, the upper end is blocked. For example, the tubular fusion unit 24 may be provided at the upper portion of the blocking plate 23 to be sealed with the plate 23 to which the color liquid injection tube 40 is connected.

The color liquid injection tube 40 is connected to the bottom of the first finishing tee 20 and the upper portion is disposed on the ground is connected to the color liquid supply 200.

The color liquid supplier 200 includes a color liquid tank 210 in which the color liquid is stored, and a color liquid pump 22 for supplying the color liquid stored in the color liquid tank 210 to the color liquid injection tube 40.

The color liquid injection tube 40 includes one or more color liquid injection holes 41 for injecting the color liquid supplied therein to the outside.

Color liquid injection tube 40 is the bottom portion is connected to the upper end of the first finishing tea 20 by fusion, etc.

The position of the color liquid injecting hole 41 is preferably the bottom of the color liquid injecting tube 40, which is close to the first and second dead teas 20 and 30, and is not limited thereto. In addition, the color liquid injection hole 41 includes a separate injection pipe portion 43 is configured.

The injection tube part 43 may be positioned around the upper head part, and may be formed in a radial tube shape (see FIG. 11) or in the form of a ring (FIG. 12) in the color liquid injection tube 40.

Color liquid injection hole 41 is preferably a check valve is configured so that the grout material is not introduced during grouting.

Color liquid injection tube 40 is a straight pipe shape (straight pipe for accurate depth measurement) is displayed on the outer circumferential surface (42) (see Fig. 6).

The scale 42 is for checking the insertion depth of the first and second finishing tea 20 and 30 with respect to the ground, and thus, the lower end of the color liquid injecting tube 40 starts with "0" and is placed on the upper portion. Up to a certain interval (for example 1m) can be displayed.

Color liquid injection tube 40 is configured to maintain a straight line for accurate measurement by the scale 42, two or more tubes can be connected in series through the coupler.

Thus, the scale 42 formed on the outer circumferential surface of the color liquid injection tube 40 allows the operator to insert the heat exchange coil tube 10 so that the top head portion can be accurately positioned in accordance with the excavation schedule line for civil engineering.

The color liquid is a grout material which is different from the grout material, and preferably a gray grout material and a red dye that is easy to identify.

The injection point of the color liquid by the color liquid injection tube 40 is during the grouting process (before the grout curing), and in particular, the color liquid is formed along the outer circumferential surface of the grouting column 50 according to the radial tube or annular shape of the injection tube portion 43. It will be fixed. Therefore, the geothermal hole (1) is formed with a section of the color different from the grouting pillar (50).

The grouting pillar 50 is formed through the injection and curing of the grout material in the geothermal hole 1, and is formed through the grouting equipment including the grouting hose 51.

While the valves 333 and 340 and the pressure sensor 70 are installed and the water pressure is applied inside the heat exchange coil pipe 10, the insertion of the civil engineering work is carried out while the insertion is completed and the upper part of the head Although the position may be recognized by the operator due to the visual effect of the colored grouting column, a separate warning band 80 (pvc, etc.) may be wound around the upper head to prevent mistakes during operation. have.

When the pressure sensor 70 is installed, the blocking plates 23 and 33 are not applied to sense the pressure inside the heat exchange coil tube 10.

The construction method of the vertical hermetic underground heat exchanger having a color warning grouting section according to the present invention is as follows (see FIG. 2).

1. Geothermal excavation.

The geothermal hole (1) is excavated from the ground to the design depth, and in the process, it passes through the excavation schedule. The depth from the ground to the scheduled excavation line for civil works should be ascertained.

2. Install the heat exchanger coil tube assembly.

The heat exchange coil tube 10, the first and second finishing tea 20, 30, the color liquid injection tube 40 is already treated as an assembly assembled on the ground (factory).

Insert the heat exchange coil pipe assembly into the geothermal hole (1) from the ground.

At this time, the grouting hose 51 is also inserted and installed.

At this time, the first and second finishing tea (20, 30) is placed higher than, for example, scheduled for excavation of civil engineering, for example, 1m high, the operator checks the scale 42 of the color liquid injection pipe 40, the first, 2 The insertion depth of the finishing tea 20 and 30 can be adjusted.

3. Hydraulic test

Whether or not the heat exchange coil tube 10 leaks by injecting fresh water for hydraulic pressure through the valves 330 and 340 installed at the first connection portion 21 installed at the first and second finishing teas 20 and 30. Check it. The applied hydraulic pressure is not released even after the insertion of the heat exchange coil tube 10 is completed and grouting re-injection and curing are completed.

4. Grouting.

The grouting material 50 is injected into the geothermal hole 1 through the grouting hose 51 to form the grouting pillar 50. Grouting pillar 50 is to form a pillar in the ground through the curing. The grouting hose 51 includes drawing out sequentially while injecting the grouting material or remaining when the grouting hose is not deep.

4. Color infusion.

Before the grout material is cured (for example, when the grout material overflows to the outside of the geothermal hole), the color liquid is supplied to the color liquid injection tube 40 from the ground, and the color liquid is mixed with the grout material or mixed with fresh water. .

The color liquid is sprayed to the periphery of the color liquid injection tube 40 through the color liquid injection hole 41.

According to the amount of the color liquid spreads the color liquid in a certain section is formed a color warning section.

As the color liquid hardens with curing of the grout material, the color warning section maintains the shape of the column without loss.

The color liquid supply unit 200 may be separated from the color liquid injecting tube 40, and the color liquid injecting tube 40 protruding above the ground may be cut if necessary.

Complete the construction of the present invention through the above process, after which the civil works.

As shown in FIG. 7 and FIG. 8, excavation is carried out during civil works, and the worker can confirm that the excavator is caught by the grouting pillar 50, thus excavating without damaging the grouting pillar 50.

On the other hand, the color warning section will appear during the excavation, the excavation worker will be more careful in the excavation work by checking the color easily identified from the grouting pillar 50 and the ground.

In this case, the protective tube 60 may be additionally overlaid on the color warning section.

The protective tube 60 may be installed in civil engineering, but alternatively, the protective tube 60 may be installed in advance in assembling the heat exchange coil tube assembly, provided that the protective tube 60 does not interfere with grouting and color fluid injection. It should be fixed to the injection tube 40 or the like. The protective tube 60 may be a steel tube or a cylindrical tube made of a synthetic resin material having a cushion function capable of activating a shock absorbing function from a blasting shock or the like.

After the installation of the underground heat exchanger system, first, as shown in FIG. 9, the hydraulic test equipment 300 may be connected to the first and second finishing teas 20 and 30 to perform a hydraulic test.

Hydraulic test equipment 300 is a valve (330, 340) which is connected to the water supply tank 310, the hydraulic pump 320, the first and second connection parts (21, 31) of the first and second finishes (20, 30) The valve is connected to the supply side and the return side, respectively, and may be inserted into the ground first while being connected to the heat exchange coil pipe), and includes a pressure gauge 350 and the like.

After completing the hydraulic test, the signal line 71 connected to the pressure sensor 70 is drawn out to the ground together with the color liquid injecting tube 40 so that the presence or absence of an abnormality can be monitored through the measuring instrument 72 from the ground. After completion of civil engineering work, it can be re-checked if the hydraulic pressure is maintained normally and if it is necessary to re-hydraulic test, it can be re-run through the above method.

After completing the civil engineering work, the first and second connecting parts 21 and 31 of the first and second finishing teas 20 and 30 or the upper heads having the same are formed with separate connections to supply and return the supply system of the underground heat exchange system. Connect the grid.

1: geothermal hole,
10: heat exchange coil pipe, 20,30: the first and second finish tea
21,31: 1st, 2nd connection part, 40: color liquid injection tube
41: color liquid injection hole, 42: graduation
50: grouting pillar, 60: protective tube
70: pressure sensor, 80: warning display band

Claims (6)

A geothermal hole formed from the ground to the design depth passing through the excavation line for civil works;
A heat exchange coil having an upper end connected to a supply system and a return system of the geothermal heat exchange system;
An upper head part sealed to an upper end of the heat exchange coil pipe;
A color liquid injection tube connected to the upper head and having an upper portion disposed on the ground, and receiving a color liquid of a different color into the geothermal hole;
A grouting hose connected to the upper head and disposed above the ground to supply grout material;
It includes a grouting column formed in the geothermal hole through the injection of grout material,
The upper head portion is disposed higher than the civil engineering excavation line, to guide the excavation work by forming a color warning section around the upper head portion by injecting the color liquid through the color liquid injection tube before curing the grouting pillar Vertical hermetic underground heat exchanger with color warning grouting section. The method of claim 1, wherein the upper head portion is made of a first and second finishes (20, 30) including a first and second connecting portion with a space therein, the first and second finishes of the heat exchange coil tube Vertical sealed underground heat exchanger having a color warning grouting interval, characterized in that coupled to the supply and the return portion, respectively. The vertical hermetic underground heat exchanger according to claim 1, wherein the distal end of the color liquid injecting tube is configured with a radial tube or an annular injection tube. According to any one of claims 1 to 3, The color liquid injection tube is a straight pipe form starting from the bottom to the top, the graduation is formed at regular intervals, the color characterized in that the depth of the upper head portion Vertical hermetic underground heat exchanger with warning grouting section. The pressure sensor of claim 1, wherein the pressure sensor is installed at the upper head and is connected to the pressure sensor to measure the water pressure of the heat exchange coil tube. A vertical hermetic underground heat exchanger having a color warning grouting section comprising: a. A first step of digging a geothermal hole to a design depth while passing through a civil engineering excavation line from the ground;
A second step of inserting and installing an assembly in which the heat exchange coil tube 10, the upper head portion, and the color liquid injection tube 40 are inserted into the geothermal hole 1, and disposing the upper head portion higher than the civil engineering excavation line Wow;
Performing a hydraulic test through the upper head part in the heat exchange coil tube 10 and inserting and installing the heat exchange coil tube 10 to a planned depth;
A fourth step of forming a grouting pillar by injecting a grout material into the geothermal holes after the third step;
And a fifth step of forming a color warning section having a color different from that of the grout material by injecting a color solution around the upper head before curing the grout according to the fourth step. Construction method of hermetic underground heat exchanger.

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