KR20020088444A - Grouting apparatus and method for deep well of ground water - Google Patents

Abstract

PURPOSE: Grouting apparatus and method for an underground deep well are provided to improve a stability and reliability of grouting construction thereof by monitoring an expansion degree of an expansion tube and the leakage of a grout. CONSTITUTION: The grouting apparatus for an underground deep well(1) consists of an encasing pipe(10) to be inserted into the deep well with being spaced apart from the inner wall of the well, and an expansion packer assembly(20) to be inserted into the deep well through the encasing pipe in order to shield a grouting section from a non-grouting section. The expansion packer assembly comprises a cylindrical body(21) formed with a loop for a drawing rope; an upper expansion tube(22) installed to shield a gap between the cylindrical body and the encasing pipe; a lower expansion tube(23) installed to shield a gap between the cylindrical body and the inner wall of the deep well; a camera(25,26) for monitoring the leakage of a grout; an injection hose(29,29') for injecting a fluid for the expansion of the upper and lower tubes; and a grout injection hose(30) connected to a space between the upper and lower tubes in order to inject the grout to the grouting section.

Description

Groundwater core grouting device and method {GROUTING APPARATUS AND METHOD FOR DEEP WELL OF GROUND WATER}

The present invention relates to an underground water well grouting apparatus and method for shielding the inner wall of the heart well with a grouting agent such as mortar so that contaminated surface water, etc., from the inner wall of the heart well excavated underground to collect ground water does not flow into the heart well.

In general, in the development of groundwater, first, the rock of the surface is excavated to the rock layer by using a fixed-thickness rig, and then, the large diameter out casing is installed to prevent the collapse of the soil layer or the weathered rock layer. Penetrating the veins of the heart to form a heart of a predetermined depth. Then, insert and install an in casing pipe to prevent the inflow of surface water contaminated in the heart, and then prevent the inflow of soil water or foreign substances in the ground water to move the lower portion of the casing pipe at the appropriate flow rate Install a perforated pipe for the strainer to keep it. Then, a predetermined grouting agent is injected and cured so that foreign matters such as surface water do not flow between the encasing pipe and the inner wall of the heart well, and a ground water pump is installed by installing a heart pump inside the casing pipe.

Here, mortar is generally used as a grouting agent. In the conventional grouting method using such a mortar as a grouting agent, an encasing pipe having a predetermined diameter is embedded in an out casing pipe of an excavated core, Injecting the mortar for grouting in between to cure. However, this method does not have a shield plate between the encasing pipe and the inner wall of the heart, so that the injected grouting agent leaks into the heart through the lower part of the casing pipe, making water greasing and perfect grouting impossible. In addition, in the conventional grouting method, when the grouting construction constructed to prevent the inflow of contaminant surface water fails for the above reason, there is no method for repairing and supplementing grouting, and thus waste gas treatment is required, resulting in enormous time and economic loss. Done.

In order to solve the above problems, the Applicant uses a method of shielding the grouting depth portion of the heart well using an expansion tube, and grouting the groundwater heart well by injecting a grouting agent into the grouting section of the heart well shielded by the expansion tube. There is a patent application. The grouting method of the previously applied groundwater core well is provided with an expansion tube which can be inflated by injecting air or water from the outside into the outer peripheral surface of the lower casing pipe inserted into the core well, and the casing with the expansion tube installed therein. After the pipe is installed in the heart, the expansion tube is expanded from the outside to shield the encasing pipe and the inner wall of the heart and inject a grouting agent.

However, in the conventional groundwater core grouting method as described above, the grouting section is often located at about 30M underground, and in many cases, grouting is performed at a depth higher than the site conditions, and in this case, expansion during construction It is not possible to check whether the tube is expanded and whether the grouting agent is leaked. Therefore, when the grouting agent is injected even when the grouting section is not shielded due to damage of the expansion tube during the grouting process, the grouting agent is introduced into the groundwater well, and in this case, follow-up measures are accompanied. This is accompanied by time and economic losses.

In addition, the conventional grouting method cannot be constructed using the incasing pipe as it is while the incasing pipe is already installed, and a new encasing pipe having an expansion tube installed after removing the existing casing pipe must be installed. It is not preferable in terms of recycling the waste holes.

In addition, the conventional grouting method is a structure in which an expansion tube is installed on the outer circumferential surface of the encasing pipe, and when the gap between the inner wall of the groundwater core and the casing pipe is narrow, the grouting construction is very difficult, and thus practical construction cannot occur. There is also a problem.

The present invention has been made in view of the above, it can be installed while confirming whether the expansion tube located at a predetermined depth of the groundwater core well and the leakage of the grouting agent with the monitor from the outside, the stability of the grouting construction And to provide a groundwater heart grouting apparatus and method that can reduce the time and economic loss as well as reliability.

Another object of the present invention is to provide a groundwater deep-heart grouting apparatus and method that can increase the degree of recycling of waste holes by grouting construction using the pre-installed encasing pipe as it is.

It is still another object of the present invention to effectively provide groundwater even when the expansion tube is not directly installed in the casing pipe in the state where the gap between the pre-inserted encasing pipe or the newly inserted encasing pipe and the groundwater inner wall is extremely narrow. It is to provide an underground water well grouting device and method that can be grouted in the heart well.

1 is a cross-sectional view schematically showing the structure of the groundwater heart well grouting device according to an embodiment of the present invention and the state in which the grouting device is installed in the heart well;

Figure 2 is a view showing the structure of the expansion tube pressure holding means that is the main part of the groundwater heart grouting device according to another embodiment of the present invention,

3 and 4 are views showing different examples of the curing promoting means that is the main part of the groundwater heart grouting device according to another embodiment of the present invention, and

Figure 5 is a schematic cross-sectional view showing the structure of the groundwater heart well grouting device according to another embodiment of the present invention and the state in which the grouting device is installed in the heart well.

<Description of Symbols for Main Parts of Drawings>

1; heart 10; encasing pipe

20; expansion pack assembly 21; cylindrical body

22; upper expansion tube 23; lower expansion tube

25; first surveillance camera 26; second surveillance camera

29,29 '; Fluid injection hose 30; Grouting agent injection hose

40; expansion tube pressure holding means

Groundwater heart grouting device according to the present invention for achieving the above object is an encasing pipe of a predetermined length is inserted into the inside of the heart well excavated to a predetermined depth to maintain a predetermined gap, and the encasing pipe It is inserted into the heart through the inside of the expansion pack comprises an expansion pack assembly for shielding the grouting section and the non-grotting section, the expansion pack assembly, the cylindrical body formed with a ring for connecting a drawing rope on the top; An upper expansion tube installed on an approximately upper side of the cylindrical body such that a gap between the cylindrical body and the casing pipe is shielded; A lower expansion tube installed on a substantially lower side of the cylindrical body such that a gap between the cylindrical body and the inner wall of the heart is shielded; A camera installed at an end of the cylindrical body to install a lamp for monitoring expansion of the expansion tube and leakage of grouting agent; A fluid injection hose for injecting fluid for pressurizing and expanding the upper and lower expansion tubes; And a grouting agent injection hose extending from the outside into a space between the upper and lower expansion tubes in order to inject the grouting agent into the grouting section of the heart covered by the upper and lower expansion tubes.

Here, the expansion pack assembly may further comprise a second camera for sensing the end of the encasing pipe in order to easily set the lowering position in the heart well, wherein the second camera is the image of the cylindrical body, It is installed between the lower expansion tube.

The expansion pack assembly may further include a sodium silicate injection hose for injecting sodium silicate as a curing accelerator for rapidly curing the grouting agent injected through the grouting agent injection hose.

In addition, the fluid injection hose may be configured independently for the upper expansion tube and the lower expansion tube, respectively.

In addition, the grouting agent injection hose is provided with a cutting device for cutting the hose after the injection of the grouting agent before curing of the grouting agent. According to this, after the grouting agent is injected, the grouting agent injection hose can be immediately taken out and recycled before the grouting agent is cured.

In addition, the grouting apparatus according to the present invention may further include expansion tube pressure adjusting means for maintaining a constant pressure of the fluid injected for pressure expansion of the upper and lower expansion tubes at all times. According to this, since the upper and lower expansion tube always maintains a constant pressure during grouting construction, it is possible to prevent leakage of the grouting agent due to the pressure drop of the upper and lower expansion tubes.

In addition, the grouting apparatus according to the present invention may further include curing promoting means for heating and heating the inside of the heart to promote curing of the grouting agent after injection of the grouting agent. According to this, since curing time of a grouting agent is shortened, the time used for grouting construction can be reduced.

Curing promoting means, it may be composed of a heating coil is wound around the cylindrical body of the expansion pack assembly. In addition, the curing promotion means may be configured to heat and warm the inside of the heart by installing a pipe from a boiler installed outside the heart inside the heart, and connecting a heater to the pipe and connecting a circulation pump to circulate hot water. have.

On the other hand, according to another embodiment of the present invention, the expansion pack assembly may be formed separately from the first and second expansion pack assembly is inserted into each of the scheduled grouting interval of the heart. The first expansion pack assembly includes an expansion tube and a surveillance camera in close contact with the inner wall of the heart, and the second expansion pack assembly includes an expansion tube in close contact with the inner circumference of the encasing pipe.

In the groundwater core grouting method using the grouting apparatus according to another embodiment of the present invention, the first expansion pack assembly is buried in the core by fast cement, etc., and after grouting is applied to the fast cement using a separate tableting machine. This involves the process of excavating the blocked heart.

The method for grouting the groundwater heart well using the grouting device according to the present invention as described above comprises the steps of: a) inserting and installing an encasing pipe to a predetermined period of grouting so as to maintain a predetermined gap with the inner wall of the heart well in the heart well; b) lowering and installing the expansion pack assembly including the upper and lower expansion tubes and the first and second supervisory cameras through the inside of the casing pipe to the grouting section of the heart; c) shielding the grouting section and the non-grafting section of the heart by injecting a pressurized fluid into the lower expansion tube and the upper expansion tube of the expansion pack assembly sequentially by expanding the expansion tube; d) curing by injecting a grouting agent into the gap between the encasing pipe and the inner wall of the heart of the heart grouting section shielded by the expansion pack assembly; And e) discharging the pressurized fluid of the upper and lower expansion tubes of the expansion pack assembly and drawing the expansion pack assembly out of the heart to remove it.

In step b), the lower position setting of the expansion pack assembly is performed by the second surveillance camera provided in the expansion pack assembly detecting the end of the encasing pipe. Therefore, since the lowering position of the expansion pack assembly can be set more easily, the construction can be made convenient.

In addition, when the grouting agent is injected in the step d), the grouting agent is injected while checking whether the grouting agent is leaked by using the first surveillance camera provided in the expansion pack assembly.

In addition, the grouting method according to the present invention may further include a step of heating and heating the inside of the heart using the curing accelerator for rapid curing of the grouting agent injected after the injection of the grouting agent according to step d).

The grouting method according to another embodiment of the present invention includes the steps of: a) inserting and installing an encasing pipe to a predetermined period of grouting so as to maintain a predetermined gap between the inner wall of the heart well and inside the heart well; b) installing the first expansion pack assembly having an expansion tube and a surveillance camera down to a predetermined depth under the grouting planned section of the heart well and inflating the expansion tube to separate and shield the grouting and unimplemented sections in the groundwater well; ; c) injecting and curing hard cement as a primary into the heart well shielded by the first expansion pack assembly; d) installing a second expansion pack assembly having an expansion tube to be positioned above the first expansion pack assembly with the heart and expanding the expansion tube to shield the inside of the casing pipe; e) injecting the grouting agent into the gap between the encasing pipe and the inner wall of the heart through the grouting agent injection hose for curing; f) removing the expansion tube pressure of the second expansion pack assembly and withdrawing the second expansion pack assembly out of the heart; And g) digging the inside of the heart clogged by the fast-hardening cement in step c) using a gearing machine.

Hereinafter, a groundwater heart grouting apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing the structure of the groundwater heart well grouting device according to an embodiment of the present invention and the state in which the grouting device is installed in the heart well, wherein reference numeral 1 is a heart well, 10 is an casing pipe, and , 20 is an expansion pack assembly which is a main component of the present invention.

As shown, the core 1 is excavated to a predetermined depth underground by a pit, and the encasing pipe 10 is the inner wall of the core 1 in the interior of the excavated core 1 as described above. It is inserted and installed to a predetermined depth so as to maintain an appropriate gap. As shown in the drawing, the expansion pack assembly 20 is installed to shield this portion at a predetermined position inside the core 1, for example, at the boundary between the grouting section and the non-growing section, so that the grouting agent injected during grouting leaks into the lower part of the heart. Do not

The expansion pack assembly 20 serving as described above is configured to have an upper expansion tube 22 disposed on an outer circumference of the upper portion of the cylindrical body 21 and a lower expansion tube 23 disposed on a lower outer circumference thereof. In addition, the upper end of the cylindrical body 21 is provided with a rope hook 24 for drawing, the lower end is provided with a first surveillance camera 25 having a lamp 25a. In addition, a second surveillance camera 26 is installed between the upper and lower expansion tubes 22 and 23 of the cylindrical body 21.

In the drawings, reference numeral 27 denotes a drawing rope for drawing in and out of the expansion pack assembly 20, 28 a power supply cable, 29 and 29 ', a fluid for injecting fluid to expand the upper and lower expansion tubes 22 and 23, respectively. Injection hose, and 30 is a grouting injection hose.

The upper and lower expansion tubes 22 and 23 have their upper and lower ends fixed and installed to the cylindrical body 21 through an airtight O-ring (not shown), so that the fluid injection hoses 29 and 29 ' The upper expansion tube 22 is shielded between the cylindrical body 21 and the encasing pipe 10, and the lower expansion tube is configured to shield a predetermined section of the core (1) during pressure injection when the fluid is injected through the). 23 is to shield between the cylindrical body 21 and the inner wall of the core 1.

In addition, the first and second surveillance cameras 25 and 26 are embedded in a waterproof case, and have a lighting device using a lamp or a light emitting diode as shown, so that the surroundings can be brightly seen even inside the dark groundwater well. It is supposed to be. Here, the first surveillance camera (25) can be easily confirmed from the outside whether the expansion tube (22, 23) is fully inflated and at the same time the grouting agent is leaked to the lower portion of the expansion pack assembly 20 when the grouting agent is injected To check whether or not Thus, the first surveillance camera 25 is connected to a monitor external to the heart. In addition, when the second surveillance camera 26 lowers the expansion pack assembly 20 into the inside of the heart, the position of the second surveillance camera 26 may be accurately and easily set. The lowered position of the expansion pack assembly 20 is determined at the position of sensing the end of the pipe 10. Therefore, the operator lowers the drawing rope 27 of the expansion pack assembly 20 while watching the monitor installed on the outside, and when the end of the casing pipe 10 is monitored, the expansion pack assembly 20 is fixed as it is. The expansion tubes 22 and 23 may be pressurized and expanded. That is, the work can be performed more conveniently.

The grouting injection hose 30 has one end connected to an injection port (not shown) provided at an approximately central portion of the cylindrical body 21, and the other end thereof extends outside the heart. Accordingly, when the expansion pack assembly 20 is lowered to a predetermined position inside the core 1 and then the upper and lower expansion tubes 22 and 23 are pressurized and expanded, the grouting agent is injected in a state in which the grouting agent is shielded. The grouting agent is injected into the gap between the inner wall of the core 1 and the encasing pipe 10 through the injection hose 30. At this time, since the lower part is shielded by the lower expansion tube 23, the grouting agent does not leak to the lower part of the core. In addition, the grouting agent injection hose 30 is provided with a cutting device 31 for cutting in order to immediately withdraw the grouting agent injection hose 30 after the injection of the grouting agent and before the grouting agent is cured. The cutting device 31 is configured to cut the grouting agent injection hose 30 and the injection port by pulling the grouting agent injection hose 30 from the outside, whereby the grouting agent injection hose 30 after the grouting agent injection ) Can be used again by withdrawing and cleaning.

On the other hand, although not shown in the drawings, in the groundwater grouting grouting apparatus according to an embodiment of the present invention, the sodium silicate injection hose of the same structure as the grouting agent injection hose 30 may be further provided. This sodium silicate serves to promote the rapid curing of the grouting agent injected between the inner wall of the heart and the casing pipe by the grouting agent injection hose 3, whereby the grouting construction time can be further shortened.

Hereinafter, a groundwater core grouting method using a grouting apparatus according to an embodiment of the present invention configured as described above will be described.

The situation for applying the grouting apparatus according to the present invention is, firstly, the pre-casing pipe is inserted, but the installation depth is shallow, the contamination surface water is introduced, second, the pre-casing pipe is installed and grouting Although the construction is reworked due to the lack of grouting, the third step is to insert and install a new encasing pipe and install the grouting without the incasing pipe inserted. This is extremely narrow. In all the cases listed above, the grouting apparatus according to the present invention can grout very effectively, and the groundwater core grouting method using the grouting apparatus according to the present invention is as follows.

First, the encasing pipe 10 is installed in the core well 1 excavated to a predetermined depth to a grouting scheduled section so as to maintain a proper gap with the inner wall of the core 1. Here, this process can be omitted when the cardiac arrest casing pipe is inserted in advance.

After inserting and installing the encasing pipe 10 in the core 1 as described above, the expansion pack assembly 20 having the above-described structure is lowered into the inside of the casing pipe 10. At this time, the expansion pack assembly ( 20) to a certain depth below the grouting interval. Here, the accurate descending position of the expansion pack assembly 20 can be accurately and easily known from the outside by monitoring by the second surveillance camera 26 installed therein. In the present embodiment, the position where the second surveillance camera 26 senses the lower end of the encasing pipe 10 is the lowered position of the appropriate expansion pack assembly 20. In addition, the upper expansion tube 22 is located inside the encasing pipe 10 at the correct position within the heart of the expansion pack assembly 20, and the lower expansion tube 23 is located between the inner wall of the heart. Done.

Once the position of the expansion pack assembly 20 is determined, the fluid, for example, air, water, or hard cement, is transferred to the upper and lower expansion tubes 22 and 23 through the fluid injection hoses 19 and 19 '. Injection is performed so that the upper and lower expansion tubes 22 and 23 are pressurized and expanded. By the above process, the upper and lower expansion tubes 22 and 23 gradually expand and pressurize, and eventually, as shown in the drawing, the cylindrical body 21 and the encasing pipe 10 by the upper expansion tube 22. The gap is shielded, and the lower expansion tube 23 is shielded between the cylindrical body 21 and the inner wall of the core 1. That is, the grouting section and the non-grafting section of the heart are completely shielded in two stages.

When the shielding of the grouting section of the core is made, the grouting agent is injected into the groundwater core by using an injection pump in which the inverter is installed. The grouting agent is injected into the grouting agent injection hose 30 installed in the cylindrical body 21. Through the gap between the casing pipe 10 and the inner wall of the groundwater core at the end of the casing pipe 10 is gradually injected into the upper portion, and finally, the groundwater, which is the top of the groundwater core, is overflowed by the grouting agent. The grouting agent will overflow. At this time, the upper and lower expansion tubes 22 and 23 shield the grouting agent from leaking to other places, and the camera 25 installed under the lower expansion tube 23 is provided with a grouting agent through a monitor installed outside. Make sure that the grouting agent flows down during the injection process. Therefore, the accident of leakage of grouting agent can be prevented beforehand. In addition, in the case of using mortar as a grouting agent, injecting sodium silicate through a separate sodium silicate injection hose can effectively induce rapid curing, and alternatively, injecting the grouting agent into the ground and injecting pipe and groundwater There is a method of injecting sodium silicate between the inner wall, so that even in the case of deep groundwater in the crushing zone can be quickly and effectively grouting construction.

When the grouting agent injection is completed by the above process, the grouting agent injection hose 30 is pulled out to be cut by the cutting device 31 and drawn out to the outside of the heart. In this way, since the grouting agent injection hose 30 can be taken out and cleaned before the grouting agent is cured, the grouting agent injection hose 30 can be reused.

Then, after a predetermined curing time, the pressure of the upper and lower expansion tubes 22 and 23 of the expansion pack assembly 20 is removed to shrink the upper and lower expansion tubes 22 and 23 and draw ropes. Pull out the 27 to remove the expansion pack assembly 20 to the outside.

Figure 2 is a view showing an example of the expansion tube pressure holding means that is the main portion of the groundwater heart grouting device according to another embodiment of the present invention.

The basic configuration of the groundwater core grouting device according to another embodiment of the present invention is the same as the above-described embodiment. In this embodiment, however, the pressures of the upper and lower expansion tubes 22 and 23 (see FIG. 1) are kept constant so that the pressures of the upper and lower expansion tubes 22 and 23 decrease during the grouting construction. It is characterized in that it is provided with an expansion tube pressure holding means (40) for preventing the leakage of grouting agent that can be.

The expansion tube pressure holding means 40 is a container opening valve 42, the primary pressure gauge 43 at the air outlet of the compressed air container 41, when air is used for the expansion tube pressure expansion, as shown in the figure , The secondary pressure gauge 44, the secondary pressure control valve 45 is provided by sequentially installed, according to this, when the pressure of the expansion tube 22, 23 senses the pressure falls below the set pressure As the secondary pressure regulating valve 45 is opened, fluid is supplied from the compressed air container 41 to the expansion tubes 22 and 23. Of course, there is no supply of additional fluid when the pressure in the expansion tubes 22, 23 is maintained at the set pressure. In this way, since the pressure of the expansion tubes 22 and 23 can always be maintained at a constant set pressure, the pressure of the expansion tubes 22 and 23 is lowered so that the grouting agent does not leak to another place. Although not shown, when a liquid such as water is used for pressure expansion of the expansion tube, a pressure regulator and a pressure regulating valve may be installed in the pump pipe to maintain a constant pressure in the expansion tube at all times. It will be appreciated by those skilled in the art.

3 is a view showing an example of the curing promoting means that is the main part of the groundwater heart grouting device according to another embodiment of the present invention, Figure 4 is a view showing another example of the curing promoting means of the embodiment.

In the present embodiment, the basic configuration is the same as in the above-described embodiment. However, here, there is a feature that the curing promoting means for curing the grouting agent injected into the gap between the inner wall of the core (1) and the casing pipe 10 more quickly. Therefore, since the curing time of the grouting agent is shortened, grouting construction time can be shortened.

As shown in Figure 3, the curing promoting means is configured to promote curing of the grouting agent by heating and heating the inside of the heart by winding the heating coil 51 on the outer circumference of the cylindrical body 21 of the expansion pack assembly 20. It is. In general, since the expansion pack assembly 20 is configured such that the length of the cylindrical body 21 is longer than the expansion tube 22 installed on the outer circumference thereof, the heating coil 51 may be wound around and installed on a margin of the cylindrical body 21. This allows the inside of the heart well to be sufficiently heated and heated.

In addition, the curing promotion means, as shown in Figure 4, the boiler 52 is installed outside the heart well and the boiler 52 and the heater 53 installed inside the heart well 1 is connected to the pipe 54, By installing a circulation pump 55 on one side of the pipe 54, the hot water heated by the boiler 51 may be circulated to the heater 53 while heating and heating the inside of the heart to promote curing of the grouting agent. have.

In other words, the groundwater core grouting device according to the present embodiment, the groundwater core wells are usually kept at a low temperature due to the four seasons of constant geothermal heat, so that the grouting agent is heated for effective curing, as well as the temperature inside the groundwater wells. To increase the curing of the grouting agent.

Figure 5 is a schematic cross-sectional view showing the structure of the groundwater heart well grouting device according to another embodiment of the present invention and the state in which the grouting device is installed in the heart well.

In the drawings, reference numeral 1 denotes a core, 10 an casing pipe, and reference numeral 100 denotes a first expansion pack assembly, and 200 denotes a second expansion pack assembly.

As can be seen through the drawings, the first expansion pack assembly 100 and the second expansion pack assembly 200 are separately formed so as to be inserted into the heart independently of each other.

The first expansion pack assembly 100 has an expansion tube 120 that is in close contact with the inner wall of the heart on the outer periphery of the body 110, the drawing rope hanger 130 on the upper portion of the body 110, and Surveillance cameras 140 are respectively installed in the lower portion. In addition, one side of the body 110 is formed with an injection hole to which the fluid injection hose 150 is connected, it is possible to inflate and expand the expansion tube 120 by injecting fluid through the fluid injection hose 150. have.

The second expansion pack assembly 200 is inserted into and installed in the core so as to be located at the upper side of the first expansion pack assembly 100 in the core, and the outer periphery of the body 210 of the encasing pipe 10. The expansion tube 220 is in close contact with the inner circumference is installed, the drawing rope hanger 230 is installed on the upper portion of the body (210). In addition, the body 210 is formed with an injection hole to which the fluid injection hose 250 is connected, and injects fluid through the fluid injection hose 250 so as to pressurize and expand the expansion tube 220. In addition, the body 210, the rope and fluid injection hose of the first expansion pack assembly 100, the rope and fluid injection hose for the second expansion pack assembly 200, the power cable and grouting injection hose ( 300) A plurality of through holes through which the back penetrates are formed. One end of the grouting agent injection hose 300 is located between the first and second expansion pack assembly (100, 200). Therefore, when injecting the grouting agent, the grouting agent is gradually injected upward from the gap between the first casing assembly and the second expansion pack assembly 100 and 200 into the gap between the casing pipe and the inner wall of the heart. Here, the grouting agent injection hose 300 also includes the cutting device 310 described above.

The grouting construction method using the grouting apparatus according to another embodiment of the present invention as described above is as follows.

First, the encasing pipe 10 is inserted and installed to the grouting scheduled section of the heart well inside the heart well 1 fixed to a predetermined depth. Of course, also in this case, such a step is omitted in the case of inserting the pre-casing pipe, the closed hole, etc., and it is well known that the diameter of the encasing pipe is smaller than the diameter of the core.

Then, the first expansion pack assembly 100 is lowered to the heart through the inside of the casing pipe 10 of the heart. At this time, the first expansion pack assembly 100 is lowered to a depth deeper than the lower end of the encasing pipe 10. In this state, the fluid is injected into the expansion tube 120 of the first expansion pack assembly 100 and expanded. As a result, the inside of the heart well is shielded at the boundary between the grouting section and the non-grouting section.

Thereafter, a certain amount of fast hard cement is injected and cured into a core well shielded by a predetermined section by the first expansion pack assembly 100 as described above. As a result, the heart feeling is completely blocked by the fast cement. In this case, whether the expansion tube 120 of the first expansion pack assembly 100 is expanded and leakage of fast cement may be checked through a monitor from the outside through the monitoring of the monitoring camera 140.

Then, the second expansion pack assembly 200 is lowered through the inside of the casing pipe 10 to the heart and installed in the upper position of the first expansion pack assembly 100, the second expansion pack assembly 200 Injecting fluid into the expansion tube 220 of the expansion tube to expand the pressure by shielding the encasing pipe.

Then, when the grouting agent is injected through the grouting injection hose 300, the grouting agent is filled with a gap between the encasing pipe and the inner wall of the heart.

When the filling of the grouting agent is completed, the grouting agent injection hose 300 is pulled out first, and the grouting agent filled in the gap between the inner wall of the heart and the casing pipe is sufficiently cured.

After a predetermined curing time, the pressure of the expansion tube 220 of the second expansion pack assembly 200 is removed to remove the second expansion pack assembly 200 by drawing it out of the heart. Here, the first expansion pack assembly 100 is buried together with fast cement in the core. Therefore, a lamp, a surveillance camera, etc. used for this use a one-time use.

After drawing the first expansion pack assembly 200 to the outside of the heart well, using a crusher to re-excavate the heart well blocked by fast cement to complete the grouting construction.

The grouting method according to the present embodiment as described above is provided with an encasing pipe in the heart well, but can be easily applied to the grouting construction of the heart well, such as when the contamination surface water is introduced due to its shallow insertion depth.

As described above, in the groundwater core grouting apparatus and method according to the present invention, although the pre-casing pipe is installed, the contamination depth is introduced due to the shallow insertion depth thereof, and the grout by installing the pre-casing pipe. In case of re-installation due to insufficient grouting and installation of new in-casing pipe without inserting the in- casing pipe, the grouting should be done, but the gap between the inner wall of the groundwater core and the in-casing pipe is extremely narrow. In any case, effective grouting construction can be implemented.

In addition, according to the present invention, since the expansion pack assembly is provided with a camera that can confirm whether the expansion tube is expanded and the leakage of the grouting agent, and a camera that can confirm the position of the injection port of the grouting injection hose, a safe and efficient Can grout construction.

Further, according to the present invention, since the means for regulating the pressure of the expansion tube is provided constantly, the grouting agent does not leak into the shielding zone of the heart because the pressure of the expansion tube decreases during the grouting construction.

Further, according to the present invention, since a means for promoting curing of the grouting agent is provided, the curing time of the grouting agent injected into the gap between the encasing pipe and the inner wall of the heart can be shortened. The overall time can be reduced.

In addition, according to the present invention, since the hose for injecting the grouting agent can be taken out after the grouting agent is injected and before the grouting agent is cured by using a cutting device, the grouting agent injection hose can be cleaned and reused.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (15)

An inner casing pipe having a predetermined length inserted into the heart well to be excavated to a predetermined depth to maintain a predetermined gap, and inserted into the heart well through the interior of the casing pipe, thereby grouting and grouting the heart well. In the groundwater heart grouting device comprising an expansion pack assembly shielding a section, The expansion pack assembly, Cylindrical body formed with a ring for connecting a drawing rope on the top; An upper expansion tube installed on an approximately upper side of the cylindrical body to shield a gap between the cylindrical body and the encasing pipe; A lower expansion tube disposed on an approximately lower side of the cylindrical body to shield a gap between the cylindrical body and the inner wall of the heart well; A camera installed at an end of the cylindrical body and installed with a lamp for monitoring whether the expansion tube is expanded and whether the injected grouting agent is leaked; A fluid injection hose for injecting fluid for pressurizing and expanding the upper and lower expansion tubes; And Grounding water heart grouting comprising a; grouting agent injection hose connected to the space between the upper and lower expansion tubing from the outside in order to inject a grouting agent into the grouting section of the heart that is shielded by the upper, lower expansion tube Device. The method of claim 1, The expansion pack assembly further comprises a second camera for sensing the end of the encasing pipe in order to easily set the lowering position in the heart, the second camera is between the upper, lower expansion tube of the cylindrical body Groundwater heart grouting device, characterized in that installed in. The method of claim 1, And the expansion pack assembly further comprises a sodium silicate injection hose for injecting sodium silicate as a curing accelerator for rapidly curing the grouting agent injected through the grouting agent injection hose. The method of claim 1, The fluid injection hose is ground water deep grouting device, characterized in that for the upper expansion tube and the lower expansion tube is configured independently of each other. The method of claim 1, The grouting agent injection hose is provided with a cutting device for cutting the grouting injection hose near the cylindrical body inlet of the expansion pack assembly so that the grouting injection hose can be quickly taken out of the heart before the grouting agent is injected after curing. Groundwater heart grouting device, characterized in that. The method of claim 1, Groundwater heart grouting device further comprises an expansion tube pressure adjusting means for maintaining a constant pressure of the fluid injected for pressurized expansion of the upper and lower expansion tubes. The method of claim 1, A groundwater heart grouting device further comprising curing means for heating and warming the inside of the heart to facilitate curing of the grouting agent after injection of the grouting agent. The method of claim 7, wherein The curing promoting means is ground water heart grouting device, characterized in that consisting of a heating coil wound around the outer periphery of the cylindrical body of the expansion pack assembly. The method of claim 7, wherein The curing promoting means is configured to extend the pipe from the boiler installed outside the heart well into the heart well, and to heat and warm the inside of the heart by circulating hot water by connecting a heater to the pipe and connecting a circulation pump. Groundwater deep grouting device. The method of claim 1, The expansion pack assembly is separated into a first expansion pack assembly having an expansion tube in close contact with the inner wall of the heart and a surveillance camera, and a second expansion pack assembly having an expansion tube in close contact with the inner circumference of the casing pipe and is suitable for the heart. The groundwater cardiology grouting device, characterized in that the insertion is installed independently at a distance, the first expansion book car assembly is buried in the heart after grouting. In the groundwater heart well grouting method for shielding the inner wall of the heart well excavated to a predetermined depth with a grouting agent to prevent surface contaminated water into the heart well, a) inserting and installing an encasing pipe in the interior of the heart well up to a predetermined period of grouting so as to maintain a predetermined gap with the inner wall of the heart well; b) installing the expansion pack assembly having upper and lower expansion tubes and first and second monitoring kemeras down to a grouting scheduled section of the heart through the inside of the casing pipe; c) shielding the grouting section and the non-grafting section of the heart in at least two stages by injecting a pressurized fluid into the lower expansion tube and the upper expansion tube of the expansion pack assembly in order to pressurize and expand the expansion tube; d) curing by injecting a grouting agent into the gap between the inner wall of the heart well of the predetermined period of grouting and the casing pipe shielded by the expansion pack assembly; And e) removing the pressure of the upper and lower expansion tubes of the expansion pack assembly to draw out the expansion pack assembly to the outside of the heart; The method of claim 11, In step b), the lowering position setting of the expansion pack assembly is such that the second surveillance camera provided in the expansion pack assembly is made by detecting the end of the casing pipe, groundwater heart grouting method. The method of claim 11, Ground water heart grouting method, characterized in that when the grouting agent is injected in the step d) using the first monitoring camera provided in the expansion pack assembly, the grouting agent is injected while checking the leakage of the grouting agent. The method according to any one of claims 11 to 13, The groundwater heart grouting method further comprises the step of heating and heating the inside of the heart using a curing accelerator for rapid curing of the grouting agent injected after the d). In the groundwater heart well grouting method for shielding the inner wall of the heart well excavated to a predetermined depth with a grouting agent to prevent surface contaminated water into the heart well, a) inserting and installing an encasing pipe in the interior of the heart well up to a predetermined period of grouting so as to maintain a predetermined gap with the inner wall of the heart well; b) installing the first expansion pack assembly having an expansion tube and a surveillance camera down to a predetermined depth under the grouting planned section of the heart well and inflating the expansion tube to separate and shield the grouting and unimplemented sections in the groundwater well; ; c) injecting and curing hard cement as a primary into the heart well shielded by the first expansion pack assembly; d) installing a second expansion pack assembly having an expansion tube to be positioned above the first expansion pack assembly with the heart and expanding the expansion tube to shield the inside of the casing pipe; e) injecting the grouting agent into the gap between the encasing pipe and the inner wall of the heart through the grouting agent injection hose for curing; f) removing the expansion tube pressure of the second expansion pack assembly and withdrawing the second expansion pack assembly out of the heart; And g) excavating the inside of the heart well blocked by the fast cement in the step c) by using a gearing machine; groundwater heart grouting method comprising a.