KR101773852B1 - Shielding device and method for forming expanded part of inner casing of groundwater - Google Patents

Abstract

The present invention relates to a shielding apparatus and a method for forming a ground water wall inner casing expansion part. The purpose of the present invention is to provide a shielding apparatus and a method for a ground water excavation hole inner casing section in which the expansion part is formed by using an expansion apparatus inside the inner casing, a shielding section is formed by shielding a gap between a hollow wall of a ground water excavation hole and the inner casing, and a grouting material is secondarily injected into an upper portion of the shielding section, and the shielding section is cured, thereby preventing the inflow of polluted ground water from an upper aquifer. The shielding apparatus for a ground water excavation hole inner casing section of the present invention comprises: the inner casing installed in the ground water well; an expansion means inserted into the inner casing and expanding the inner casing towards the ground water hollow wall to shield a gap between the inner casing and the ground water hollow wall; a driving means connecting the expansion means to a connection rod and driving the expansion means; a perforation means perforating a grouting injection hole in the inner casing; and a grouting material injection means injecting the grouting material into the grouting injection hole perforated by the perforation means to form a grouting water barrier.

Description

Shielding device and method for forming a casing expansion part in a groundwater well

More particularly, the present invention relates to an apparatus and method for shielding an inner casing of an underground water tube, and more particularly, to a method of shielding an inner casing by using an expansion pipe And the inner casing is crimped to form a perforated hole. By securing the perforated wall, the upper and lower sections can be divided and shielded in a designated section, thereby providing a shielding device and a shielding method. Thus, The present invention relates to a shielding apparatus and method for forming a casing expansion portion in a groundwater canal so as to prevent groundwater contamination by preventing a leakage of grouting material and preventing the leakage of grouting material.

Groundwater (groundwater) refers to water flowing or flowing between gaps in rocks or underground strata. As industrialization progresses in modern times, environmental pollution deepens and soil pollution becomes serious. The contamination rate of groundwater formed by permeation is also increasing day by day. The strata usually consist of a layer of weathered rock with a high permeability to soil and groundwater composed of ordinary soil and sand, and a soft rock layer, which can be called impervious layer, followed by a rock and a rock layer. The rock aquifer underground water formed in the layer below the soft rock layer is not affected by the contaminated groundwater from the soil layer or the weathered rock layer above the stratum, so that the water quality remains clear and clean.

However, the soil layer and the weathered rock layer can function as a part of filtration from various pollutants flowing from the upper surface of the earth. However, if the time of natural purification is short and the soil layer or weathered layer is contaminated, A situation occurs.

In the process of groundwater development, the soil layer and the weathered rock layer are pierced naturally, and the pierced section is formed by passing through the soft rock layer, the ordinary rock, and the carcass layer. As a result, groundwater that is vulnerable to pollution or polluted has become naturally contaminated in the groundwater of uncontaminated rock aquifer without any resistance or filtration, and has become a major factor in groundwater aquifer contamination.

Therefore, how to protect groundwater from rock aquifers from such contaminated upper groundwater and block the influx of groundwater in the process of groundwater development is the main objective of the underground protection wall.

Moreover, due to the increase in income level and the increase in outdoor leisure and travel, interest in clean drinking water has been increasing more and more, and the absolute amount of the disturbance is being supplied through rock groundwater.

On the other hand, the groundwater pollution problem is becoming a serious social problem due to accidents caused by various groundwater pollution such as AI and Norovirus. Therefore, the seriousness of social repercussions and the increase of the groundwater pollution rate are necessary for the development of groundwater pollution prevention technology In the process of groundwater development, it is necessary to plan the appropriate application of the groundwater pollution prevention device or plan the application of the groundwater pollution prevention device. It is expected that it is coming to a point when it must be forced through.

The problem is that, in the case of newly developed groundwater, it is important to take measures to restore the water quality of the groundwater that has already been contaminated, as well as to take necessary measures to preserve the groundwater quality due to these pollutants. Conventionally, it was a general measure to treat the ground water contaminated with water quality (including geothermal heat for underground heat exchangers) by buried and buried.

However, since the application of the invention No. 10-0299417 (the name of the invention: watering system and sampling method for each depth range of groundwater) of the present invention is made as a general process in the field, In this process, it is confirmed that the majority of the groundwater contamination of contaminated water quality is caused by the inflow of groundwater contaminated by upper layer into the rock groundwater. This is caused by the fact that the lower ground protection wall And it was found that it was caused by the failure of construction or the old age.

However, in the case of the existing groundwater, it is necessary to remove the internal casing (installed inside the groundwater well in order to protect the groundwater pumping facility from the accident of the ground water excavation wall, etc.) It is possible to carry out the subsequent process of rehabilitating the water wall or improving the facility by inserting the casing for the lower surface protection wall again after the formation of the inner casing, There are many cases where water quality improvement restoration work itself has to be abandoned. Therefore, there is a need for a technique capable of constructing a sub-surface protection wall structure capable of eliminating the inconvenience and facilitating the pumping test by installing a pre-packer.

In another method, a grouting material is injected between the inner casing and the groundwater excavation wall to form a water wall, thereby blocking contaminated ground water, thereby improving the water quality and enabling the facility to continue to be used.

However, if a grouting material is injected between the inner casing and the excavation wall, there is a problem that the grouting material flows down and a technique for stopping the grouting material is required. For this, a method of using a shielding material having a high viscosity such as silicone However, when there is a difference between the water level between the inner casing and the excavation wall and the water level inside the inner casing, there is a problem that the watering pressure can not be basically prevented from flowing down due to the water level. Accordingly, there is a need for a shielding device and a shielding method capable of stably injecting the grouting material to form a water wall. In order to solve these problems, Patent No. 10-1337610 (patent name: shielding device and method for the inner casing section of a groundwater drilling hole) was developed and applied to the field, but a method of preventing leakage of the grouting material through the perforation It is necessary to provide a shielding means and method for the fundamental shielding.

10 KR0334451 10 KR0460127 10 KR0848395 10 KR1089665 10 KR1337610 10

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for forming an expanded portion by using an expansion pipe from the inside of an inner casing, And an object of the present invention is to provide an apparatus and method for shielding a casing section in an underground water excavator so as to block inflow of upper layer contaminated groundwater by injecting and curing a secondary grouting material on a formed shielding section.

The apparatus for shielding a casing section in an underground water boring hole according to the present invention comprises an inner casing installed in a groundwater tank, and an inner casing inserted into the inner casing to expand or extend the inner casing toward the groundwater wall to shield the inner casing and the groundwater A drilling means for drilling a grouting injection hole in the inner casing; a driving means for driving the expanding means by connecting the expanding means to the connecting rod; And grouting material injection means for injecting a grouting material into the grouting hole drilled by the perforation means to form a grouting water wall.

According to the shielding apparatus and method for forming the casing expansion portion of the groundwater canal according to the present invention, the expansion pipe is inserted into the inner casing of the groundwater drilling hole and the inner casing is expanded to the ground water hole to form the expansion portion, It is possible to prevent the contamination by the grouting material for the formation of the water wall by dividing the ground inflow section of the upper layer and the ground inflow section of the rock.

Therefore, effectively shielding the upper groundwater flowing between the inner casing and the excavation wall and effectively treating water pollution of general groundwater and geothermal underground heat exchanger through injection and curing of grouting material on the top of the shielding box without flowing down, This system is effective for the improvement of the related industries as well as securing the technology for the maintenance of groundwater quality.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a shielding apparatus for forming a casing expansion part in a groundwater canal according to the present invention; FIG.
FIG. 2 is a sectional view of a grouting state after forming a casing expansion part in a groundwater canal according to the present invention. FIG.
3 is a cross-sectional view of Embodiment 1 of the expanding means of the shielding apparatus for forming a casing expansion portion in a groundwater canal according to the present invention.
FIG. 4 is a plan view of an expanding means of a shielding apparatus for forming a casing expansion portion in a groundwater canal according to the present invention. FIG.
FIG. 5 is a sectional view of Embodiment 2 of the expanding means of a shielding apparatus for forming a casing expansion portion in a groundwater canal according to the present invention. FIG.
6 is a conceptual diagram of installing a perforating means of a shielding apparatus for forming a casing expansion portion in a groundwater canal according to the present invention.
FIG. 7 is a perspective view of a casing hole in a casing of a groundwater according to the present invention. FIG.
FIG. 8 is a conceptual diagram illustrating the pumping test after grouting of a shielding apparatus for forming a casing expansion part of a groundwater tube according to the present invention.

As shown in FIG. 1, the shielding apparatus for forming a casing expansion portion of a groundwater tube according to the present invention includes a connecting rod 7 connected to an inner casing 8 through an expanding means 30, It is rotated using a driving means 3 such as an excavator. The expanding means 30 is configured such that the material of the inner casing 8 is applied to a stainless steel pipe or a general steel pipe, and the shape and operation applied to a PVC or PE material pipe are different from each other.

[Example 1]

First, when the inner casing 8 is made of a stainless steel pipe or a general steel pipe, the expanding means 30 includes a hydraulic cylinder (not shown) inside the expanding body 34 made of a metal material as shown in FIGS. 1, 3, 32 are applied with hydraulic pressure through the hydraulic hose 5, the expanding cylinder 33 is configured to move forward and backward. A ball bearing 35 is provided at the distal end of the expanding cylinder 33 so that the frictional resistance on the inner surface of the inner casing 8 is not large even when the expanding body 34 rotates. The expander body (34) is preferably made of thick steel pipe or cast product, and the connecting rod is screwed on the upper part. The hydraulic pressure is produced by a separate hydraulic pump 40 installed on the ground.

The frictional heat is easily generated even if the expanding means 30 is rotated by the operation of the driving means 3 because the position of the inner casing 8 to be constructed with the expansion portion 31 is generally the depth at which the groundwater 2 is immersed It is possible to prevent the device from being damaged and being damaged by frictional heat. When the expanding means 30 is rotated inside the inner casing 8 by the driving means 3, the hydraulic pump 4 is operated and the generated high hydraulic pressure is supplied to the expander body 34 via the hydraulic hose 5 The expanding cylinder 33 is pushed out from the hydraulic cylinder 32 and is strongly pushed outward from the inside of the inner casing 8. The stainless steel pipe material is particularly ductile because it is easy to pull out and can be expanded and formed. When the expansion tube portion 31 is formed by the expansion molding, the hydraulic pressure is slowly raised and rotated so that an unreasonable force is not applied to the hydraulic cylinder 32 There is a need. When the forming of the tube portion 31 is completed and the hydraulic pressure is released, the expanding cylinder 33 is returned to its original position by using a spring or a hydraulic pressure through a separate reverse hydraulic pressure supply, So that it can be withdrawn. At this time, the hydraulic hose 5 for the hydraulic cylinder 32 needs to be separately formed for forward and backward movement. Of course, the expansion cylinder 33 using oil pressure may be deformed into a cam shape using up and down movement of the conical hydraulic cylinder, and may be operated and modified in various forms. In other words, the expanding means (30) expands or expands the inner casing (8) by the outflow and cylinder rotation of the expanding cylinder (33) operated by hydraulic pressure.

Even if the inner casing 8 is eccentrically disposed to one side of the ground water vacancy 1 and the expanding cylinder 33 rotates along the inner inner circumferential surface of the inner casing 8 to form the expanded portion 31 It may collide with the ground water wall (1) and the expansion itself may become difficult. In this case, the perforation hole is formed at a predetermined depth at a predetermined depth in a known manner so as to insert the pin for centering into the groundwater bore 1 so that the center of the inner casing 8 is close to the center of the groundwater well And then proceed with the operation.

It should be understood that the present invention is also within the scope of the present invention in its modified form of an expanding cylinder that includes a single cam shape that is capable of back and forth using pressure fluid such as hydraulic or hydraulic pressure.

[Example 2]

When the inner casing 8 is made of PVC or PE material, the expanding means 30 utilizing the characteristic that the characteristics of the two materials can be deformed by heat is applied.

As shown in FIG. 5, the expanding means 40 is inserted into the inner casing 8 and installed therein. The expanding means 40 allows the upper packer 41 and the lower packer 42 to block the section in which the expanded portion 31 of the inner casing 8 is formed. The upper packer 41 and the lower packer 42 are each provided with a compression fluid hose 47 capable of injecting a compressed fluid such as compressed air, (50). In the section where the upper packer 41 and the lower packer 42 are shielded, compressed water heated from the outside is formed on the support pipe 60 in the shielded section by using the water pipe 45 and the water pipe 46 The inner casing 8, which is made of PVC or PE material, is thermally deformed at a temperature of about 60 ° C. to form the expanded portion 31. In order to prevent a deformation accident caused by the load of the upper section of the inner casing 8, the expanding means 40 may be provided with a pulling force or a force to support the load of the upper section of the inner casing 8, You need to do it. Of course, the heater hot wire 48 may be installed in the form of a coil or a rod in the inside of the direct expansion means 40 without heating the boiler or the like from the outside, and heated by the power supplied through the power cable 49 to achieve the same effect It can also be implemented. In such a case, the internal groundwater may be circulated to check the temperature change to determine the degree of heat transfer, or a separate temperature sensor may be installed and operated. When the shielding section is heated to an appropriate temperature or more, compressed air or water pressure may be applied to mold the tube portion 31.

That is, the expanding means 40 shields the section through the upper packer 41 and the lower packer 42 inside the inner casing 8 and presses the inner casing 8 heated through the circulation of the high- The inner casing 8 is expanded or expanded to the groundwater bore 1 through the deterioration deformation so as to shield the space between the inner casing 8 and the groundwater bubble wall 1 or is heated through the heater hot wire 48 to inject compressed air or water pressure So that the heated inner casing 8 is expanded or expanded toward the ground water sidewall 1 through deformation to shield the inner sidewall 8 from the ground water sidewall 1.

Although the expanding means 30 and 40 can strongly prevent the inflow of a large amount of ground water into the ground water well by strongly pressing the ground water wall 1, (1) erosion of the groundwater bore wall (1) may occur due to the flow of pumping water from the groundwater and the groundwater contamination may be reemerged. Therefore, the inner casing 8 is formed with a perforation hole for grouting. As shown in FIG. 7, the perforation hole is divided into a lower perforation hole 20 for injecting the primary grouting and an upper perforation hole 23 for injecting the secondary grouting material. Of course, it is natural that grouting can be done with one perforation hole without separating the upper part.

The drilling means 100 is used for drilling holes.

 The perforation means 100 includes a perforator head 103 having a space formed therein and a drive shaft 103 mounted on the perforator head 103 and connected to the connection rod 7 to receive power through an excavator or a manual driving means 3 And a perforation drill 110 for perforating the inner casing 1.

The perforation drill 110 can be used for all products capable of perforating the upper and lower perforation holes 23 and 20 in the inner casing 1.

Since the perforation drill 110 punctures the upper end perforation hole 23 and the lower end perforation hole 20 by rotational force and advancement, the push cylinder 101 having the function of a forward / backward actuator (for example, a hydraulic cylinder) As shown in FIG. Such a perforation means 100 is disclosed in a number of patents filed by the present inventor and can be sufficiently carried out by those skilled in the art, so a detailed description thereof will be omitted.

Although only one perforation drill 110 is shown in the drawing, the perforation drill 110 may be installed at two upper and lower portions, or two or more perforated drills 110 may be installed at regular intervals along the circumferential direction. Further, the detailed description for the perforation is described in the prior art Patent No. 10-1337610, and the detailed explanation is omitted.

The grouting material is injected into the inner casing 8 so that the grouting material is injected into the grooved water receiving layer 21 when the inner casing 8 is shielded from the ground water vacancy wall 1 ). That is, the grouting layer 21 may be formed in a single structure on the expansion portion 31, or two grouting water walls 22 may be formed. The grouting material in the first stage may be formed of silicon admixture or epoxy material, And the second stage grouting material can be filled up to the target section or the ground portion as a grouting material made of general cement or quick hardening cement or the like. have.

The grouting material is injected by drilling the upper and lower injection holes 23 and 20 into the inner casing 1 by using the perforation means 100 and by using a separate grouting material injection means 24 can be used to inject the grouting material into the space between the inner casing 8 and the groundwater pneumatic wall 1 through the upper and lower injection holes 23, The grouting material injecting means 24 is already known in the prior art Patent No. 10-1337610, and a detailed description thereof will be omitted.

8 shows the test and pumping of the groundwater in the groundwater well where the expansion part 31 and the water wall 21 are formed according to the present invention. The pumping device 200 is connected to the inner casing 8 through the packer 210 The groundwater at the bottom of the packer 210 is not contaminated by the water wall 21 and the packer 210 so that the groundwater can be pumped by the water pump 220 or the water quality and quantity change .

The space between the inner casing 8 and the groundwater pneumatic wall 1 is shielded by the formation of the expanding portion 31 so that the water level between the inner casing 8 and the groundwater pneumatic wall 1 So that the watertightness of the shielding zone is not damaged due to the difference in water level, a balance hole for balancing the water level of the two spaces is formed on the upper part, and the water level balance function and the upper perforation for grouting material It can be used as the hole 23 as well.

The shielding method for forming the casing expansion part of the inner wall of the groundwater according to the present invention is as follows.

1. Formation of internal casing expansion part

The expansion means (30) is inserted into the inner casing (8) at a planned shielding depth. The expanding means 30 is operated so that the inner casing 8 is expanded or expanded so that the inner casing 8 is shielded from the groundwater pneumatic wall 1. [

2. Internal casing injection hole drilling

A primary injection hole 20 and a secondary injection hole 23 for injecting grouting between the inner casing 8 and the groundwater pneumatic wall 1 on the upper portion of the expansion portion 31 formed in the inner casing 8 are drilled .

The perforation drill 12 is rotated and advanced while the perforation means 100 is inserted into the inner casing 1 to set the perforation means 100 to the perforated position and then the power supply portion 20 is driven to drive the perforated drill 12, 1, the first drilling hole 20 and the second drilling hole 23 for drilling a plurality of grouting grooves at predetermined intervals are drilled while moving the drilling drill 12 along the circumferential direction.

The formation of the inner casing 8 expansion portion 31 and the drilling of the inner casing 8 and the injection holes 21 and 23 may be performed in a different order.

3. Grouting.

A grouting material having a viscosity is firstly injected through the primary injection hole 20 formed in the upper part of the expansion part 31 formed in the inner casing 8 and the primary injection hole 20 is formed through the secondary injection hole 23, A grouting material is injected into the space between the inner casing 1 and the wall surface of the vessel 2 to form a water-receiving wall 70.

1: groundwater bubble 2: groundwater
3: drive means 4: hydraulic pump
8: inner casing 20: lower end hole
23: Upper hole 30:
31: Expansion section 41: Upper packer
42: Lower packer 100: Perforation means
101: compression cylinder 102: camera
103: perforator head 110: perforator drill

Claims (7)

An inner casing installed in the groundwater well;
An expanding unit inserted into the inner casing to expand or extend the inner casing toward the underground water hole to shield the inner casing from the underground water hole;
A drive means for connecting and extending the expanding means by a connecting rod;
A drilling means for drilling a grouting injection hole in the inner casing;
And grouting material injection means for injecting a grouting material into the grouting holes drilled by the drilling means to form a grouting water wall,
Wherein the expanding means expands or contracts the inner casing by the movement of the cylinder operated by hydraulic pressure and the rotation of the cylinder. delete The shielding apparatus according to claim 1, wherein a ball bearing is formed on an outer side surface of the cylinder of the expanding means. delete An inner casing installed in the groundwater well;
An expanding unit inserted into the inner casing to expand or extend the inner casing toward the underground water hole to shield the inner casing from the underground water hole;
A drive means for connecting and extending the expanding means by a connecting rod;
A drilling means for drilling a grouting injection hole in the inner casing;
And grouting material injection means for injecting a grouting material into the grouting holes drilled by the drilling means to form a grouting water wall,
The expanding means covers the section through the upper packer and the lower packer to the inside of the inner casing, heats the shielded section through the hot line, and pressurizes the compressed air or the water pressure to apply pressure to the heated inner casing, Wherein the inner casing is shielded between the inner casing and the groundwater pneumatic wall. A shielding method using a shielding apparatus for forming a casing expansion part of a groundwater canal according to claim 1 or 5,
A first step of expanding or expanding the inner casing by using an expanding means in the inner casing inserted in the groundwater pool to shield the space between the inner casing and the groundwater pool;
A second step of processing a grouting injection hole by using a perforation means on the shielded section through the first step;
And a third step of forming a water-shielding wall by injecting a grouting material into the space between the inner casing and the ducting at the upper portion of the shielding layer formed through the first step, using a grouting material injection means, thereby forming a shielding layer A method of shielding formation of a casing expansion part in a groundwater well. A shielding method using a shielding apparatus for forming a casing expansion part of a groundwater canal according to claim 1 or 5,
A first step of processing a grouting injection hole by using a punching means in an inner casing inserted into a groundwater well;
A second step of expanding or expanding the inner casing using shrinking means to shield between the inner casing and the groundwater pneumatic wall;
And a third step of forming a water-shielding wall by injecting a grouting material into a space between the inner casing on the upper part of the shielding section formed through the second step and the ducting by using a grouting agent injection means, thereby forming a shielding layer A method of shielding formation of a casing expansion part in a groundwater well.

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