KR20070114966A - Pressurized grouting packer with waterproof function - Google Patents

Abstract

A pressure grouting packer having a water-sealing function is provided to increase construction efficiency for reinforcing an excavation surface or a slope by forming in an expansion body expanded and increased in a diameter by contacting with water in a perforated hole, thereby inserting a packer to a perforated hole easily, to increase construction quality for reinforcing an excavation surface or a slope by sealing up a perforated hole quickly and keeping the sealed state continuously, and to perform construction environment-friendly and economically by being expanded without injecting liquefied foaming agent. A pressure grouting packer(10) having a water-sealing function includes a packer body(11) inserted to a perforated hole formed under the ground and provided with plural through holes(12). The packer body is composed of an expansion body(A) manufactured with hydrophilic resins to have the smaller outside diameter than the inside diameter of the perforated hole to be inserted to the perforated hole without hanging on a rugged internal wall of the perforated hole and expanded spontaneously if the packer body makes contact with grout materials or stratum water in the perforated hole to be adhered closely to a core member(30), a grouting pipe(40) and an air discharge pipe(50) without a gap, so that the perforated hole is sealed up quickly and perfectly without injecting a liquefied foaming agent. In addition, many insulated conductors(13) are buried in the cross section of the expansion body in the longitudinal direction to restrain the packer body not to be expanded in the longitudinal direction and to be expanded in the circumferential direction only, so that the packer body is adhered closely to the internal wall of the perforated hole.

Description

Pressurized grouting packer with waterproof function

Figure 1 shows a perspective view of the prior art

Figure 2 shows an embodiment of the prior art

Figure 3 is a perspective view of the packer of the present invention

Figure 4 is a longitudinal cross-sectional view of the packer of the present invention

Figure 5 shows the packer of the present invention in a cross-sectional view

Figure 6a shows a state of inserting the packer of the present invention into the drilling hole

Figure 6b shows a state in which the perforated hole is sealed with the packer of the present invention

Figure 7 is a perspective view of a packer according to an embodiment of the present invention

8 is a sectional view showing a packer according to an embodiment of the present invention

<Description of Symbols for Major Parts of Drawings>

10: Packer 11: Packer Torso

12: through-hole A: diameter molding

13: bend core 14, 15: upper and lower reinforcement plate

16: long bolt 17: nut

The present invention is to be inserted with a nailing body or an anchor body (hereinafter referred to as "core material") in the drilled hole drilled at the excavation surface or slope reinforcement, so that the grout chemical liquid can be injected by pressure, especially in the drilled hole The present invention relates to a packer for pressurized grouting that has an exponential function that allows insertion, but also provides a quick and reliable sealing performance and exponential performance in a drilled hole.

Soil nailing or anchor is widely used for the purpose of reinforcing and stabilizing exposed slopes by excavating the excavated surface or inclined ground exposed by excavating the ground.

Soil nailing method is to excavate several drilling holes on the excavation surface or slope, insert a core material such as reinforcing bar, strand, micropile in each drilling hole and inject and harden grout chemical solution, It has been constructed to be stabilized by reinforcement.

In addition, the anchor method excavates a plurality of drilling holes on the excavation surface or slope, inserts core materials such as steel rods, strands, etc. into the individual drilling holes, injects and hardens the grout chemical solution, and drills them so that compression force is introduced into the excavation surface or slope. It has been constructed to stabilize the core material outside the hall by reinforcing the excavation surface or slope.

However, such a nail nailing method or an anchoring method, since the grout chemical is injected into the core after inserting the core material into the drilled hole, the grout chemical solution is not widely spread to the strata around the hole, and the excavation hole Since the grout chemicals could not be securely filled in the surrounding voids and joints, there was a defect that could not stabilize the excavation surface or the slope.

Recently proposed to solve the above problems, domestic registered utility model publication No. 20-0290351 (announced on September 27, 2002), as shown in Figure 1, nail (1) and; A first packing 2 and a second packing 3 which are fitted at predetermined intervals on the center in the longitudinal direction of the nail 1; A nonwoven fabric 4 installed surrounding the outer circumferential surfaces of the first packing 2 and the second packing 3 to seal a space between the first packing 2 and the second packing 3; A first grouting tube for penetrating the first packing 2 and the second packing 3, one end of which is installed at a position proximate to one end of the nail 1, for injecting grout chemical into the grouting area ( 5); Air and foreign matter for penetrating the first packing 2 and the second packing 3, one end thereof is installed in close proximity to the second packing 3, to remove air and foreign matter in the grouting area according to the grouting A removal tube 6; It is installed so as to penetrate the first packing (2), one end of which is located in the space between the first packing (2) and the second packing (3), the gel in a space enclosed by the nonwoven fabric (4) [0003] A pressurized soil nailing packer having a foam urethane injection pipe 7 for injecting a foam urethane that is expanded in volume has been registered as an elected source.

The pressure soil nailing packer is inserted into the drilling hole 8 while being mounted on the nail 1, as shown in FIG. 2, so that the nonwoven fabric 4 is interposed between the first packing 2 and the second packing 3. Since the urethane foam is injected into the empty urethane injection tube 7 and expands, the urethane chemical is expanded and sealed, thereby closely sealing the punching hole 8, and then through the first grouting tube 5. It is possible to pressurize the grout chemical solution into the nail, so that the nail 1 can increase the bonding force with the strata in the perforation hole 8, and the grouting chemical liquid is filled even in the pores or joints formed in the strata in the perforation hole 8. To do so, the excavation surface or slope is firmly reinforced to stabilize.

However, such a conventional pressure nailing packer seals the empty space between the first packing 2 and the second packing 3 with the nonwoven fabric 4 and foams the void space in the nonwoven fabric 4. Since it is configured to inflate by expanding the urethane chemical solution came with the following problems.

First, when the outer diameters of the first packing 2 and the second packing 3 are smaller than the inner diameter of the drilling hole 8, the upper and lower ends of the packer are spaced apart from the inner wall of the drilling hole 8 and the foamed polyurethane chemical Since only the portion of the nonwoven fabric 4 which is enlarged by the expansion force of the close contact with the inner wall of the drilling hole 8, the actual airtight holding area is reduced, so that it is impossible to properly inject the grout chemical liquid. When the outer diameters of 2) and the second packing 3 are substantially the same as the inner diameter of the drilling hole 8, the first packing 2 and the second packing 3 in the process of inserting the packer into the drilling hole 8 There was a problem in that it could not be easily inserted by being caught by the inner wall of this rugged drilling hole 8.

Second, since the packer is inserted into the drilling hole 8, the liquid polyurethane foaming liquid is injected and expanded through the foaming urethane injection pipe 7, so that the groundwater eluted from the drilling hole 8 cannot be quickly indexed. In addition, the polyurethane foam liquid is diluted by the ground water to prevent it from expanding properly, and the polyurethane foam liquid is mixed and discharged into the ground water to contaminate the surrounding soil, and the polyurethane foam liquid is injected into the empty space in the nonwoven fabric 4. In order to provide a foam urethane injection pipe 7 and the injection device, there was a problem in that unnecessary costs.

Third, the foamed urethane chemical liquid injected into the nonwoven fabric 4 between the first packing 2 and the second packing 3 does not maintain its expansion force due to deterioration after a predetermined time, and thus is loosened. There was a problem that the groundwater flowing out through the hole 8 could not be indexed.

The present invention is to be made of a diameter-molded body that maintains the inner diameter is small until the packer body is inserted into the drilling hole and expands and expands upon contact with moisture in the drilling hole, firstly, to be easily inserted into the drilling hole The purpose is to provide a pressurized grouting packer that has an exponential function that improves construction efficiency due to reinforcement or slope.

Second, the purpose of the present invention is to provide a pressurized grout packer that has an exponential function to improve the construction quality according to the excavation surface or slope reinforcement by sealing the drilling hole quickly and reliably and continuously maintaining the closed state. ,

Third, it is an object of the present invention to provide a pressure grouting packer having an exponential function that allows expansion of the liquid foam without injecting the liquid so that it can be eco-friendly and economically constructed when reinforcing an excavation surface or slope.

3 to 5, the packer body 11 is formed to have a plurality of through holes 12 inserted into the boring hole 20 excavated in the ground and drilled in the vertical direction. In this case, the technical concept is the same as the conventional one.

However, in the pressurized grouting packer 10 having the exponential function of the present invention, the packer body 11 is made of a water-expanded resin as a diameter-molded article (A) having an outer diameter smaller than the inner diameter of the drilled hole 20. It is characterized by the technical configuration.

Hereinafter, the technical details of the present invention through the specific embodiments shown in the accompanying drawings in detail.

In the embodiment of the present invention, as shown in Figs. 4, 6A and 6B, the plurality of through holes 12 drilled in the packer body 11 are each fitted with one or more cores 30 through, as needed Each grouting pipe 40, the air discharge pipe 50, etc. are inserted through, the core material 30, the grouting pipe 40, the air discharge pipe 50, etc. together with the packer 10 of the present invention is a corresponding hole ( 20, it is illustrated that the grout chemical liquid can be pressurized through the grouting pipe 40 while allowing the air in the drilling hole 20 to be discharged to the outside through the air discharge pipe 50.

3 and 4, it is important that the packer body 11 is made of a diameter-expanded molded body A having an outer diameter smaller than the inner diameter of the drilling hole 20 using water-expandable resin as a material.

The reason is that the packer body 11 can be inserted without being caught by the inner wall of the rugged drill hole 20, and if the packer body 11 is in contact with the grout liquid or groundwater in the drill hole 20, While inflating, it is in close contact with the inner wall of the drilling hole 20 without a gap, and is closely contacted with the core 30, grouting pipe 40, air discharge pipe 50, etc., respectively fitted in the through holes 12, the liquid foam liquid This is to enable to close the perforation hole 20 quickly and completely without the need for injection.

In addition, a plurality of bend cores 13 are embedded in the longitudinal direction in the cross section of the enlarged-shaped molded body A constituting the packer body 11. These bent cores 13 allow the packer body 11 to expand only in the circumferential direction while preventing the packer body 11 from expanding in the longitudinal direction, so that the packer body 11 is more secured to the inner wall of the perforation hole 20. Make sure they are in close contact.

In addition, the diameter-molded article (A) constituting the packer body 11 has a diameter size smaller than the punched hole 20 as a whole, and the upper end is preferably formed of a cylindrical body of the upper and lower straits with a small outer diameter.

This packer body (11) helps to be inserted naturally without being caught in the drilling hole (20) as a cylindrical body of the upper and lower strait. In addition, the packer body 11 is first in close contact with the inner wall of the punched hole 20 while the upper end of the outer diameter is expanded when it comes into contact with the grout chemical or the groundwater injected into the punched hole 20. It is possible to cut off the water rapidly, while the lower end of the relatively small outer diameter is expanded, and subsequently closely adhered to the inner wall of the drilling hole 20 to faithfully bear the pressure by the grout chemical solution injected under pressure.

Here, the through holes 12 of the packer body 11, respectively, the upper end of the diameter is small and the lower end of the diameter may be formed to be formed.

This can be easily set by inserting one end of the core material 30, the grouting pipe 40, the air discharge pipe 50 from the bottom to the upper for each individual through hole 12 formed in the packer body 11, respectively. At the same time, when the packer body 11 is in contact with the grout medicament or the groundwater in the drilling hole 20, each of the through-holes 12 are expanded while being inserted through each of the core material 30, grouting pipe 40, the first close to the outer surface of the air discharge pipe 50, and helps to quickly block the grout liquid or groundwater from flowing through the individual through holes (12).

Pressurized grouting packer 10 having an exponential function according to an embodiment of the present invention as described above, first, by forming a packer body 11 as an expanded diameter molded body (A) having a smaller outer diameter than the inner diameter of the drilling hole 20, perforation In the process of inserting the packer 10 into the hole 20, the packer body 11 can be easily inserted without being caught by the inner wall of the rugged perforated hole 20, thereby reducing work time and improving work efficiency. There is an advantage to increase.

Second, the packer body 11 is formed as a diameter-molded article A which expands itself by moisture contact, and the packer is in contact with the grout liquid or the groundwater in the state in which the packer 10 is inserted into the drilling hole 20. While the body 11 is inflated, the inner wall of the drilling hole 20 is in close contact with each other without a gap, and the core material 30 inserted into each of the through holes 12, the grouting pipe 40, and the air discharge pipe 50 are closely contacted with each other without a gap. As a result, the grout chemical solution and the groundwater which are pressurized are not only reliably blocked, but also have a merit of indexing the groundwater while maintaining the sealing function for the drilling hole 20 even after a long time after construction.

Third, forming the packer body 11 as a diameter-molded article (A) that does not need to inject the foam liquid, while preventing the surrounding soil contamination generated when the foam liquid is injected, it is necessary to provide a mechanism for the foam liquid injection This has the advantage of reducing the cost.

7 and 8 illustrate an embodiment of the present invention, wherein a plurality of through holes 14a and 15a are respectively connected to upper and lower ends of the packer body 11 so as to communicate with the through holes 12 of the packer body. A plurality of perforated upper and lower reinforcement plates 14 and 15 are disposed, and the upper and lower reinforcement plates 14 and 15 are coupled to the upper and lower reinforcement plates 14 and 15 through the packer body 11. Long bolt 16 and the nut 17 is to be fixed.

According to one embodiment of the present invention, when the packer 10 is inserted into the perforated hole 20 to be refracted and injected into the grout chemical solution to tension the core material 30 in the hardened state, the The upper and lower reinforcement plates 14 and 15 hold the sleeve S fitted to guide the core 30 to the through hole 12 of the packer body 11 so as not to be severely bent in the deflected direction, so that the core 30 ) Is inserted into the through hole 12 is torn to prevent the packer body 11 loses the sealing function.

In addition, the upper and lower reinforcement plates 14 and 15 allow the packer body 11 to expand in the circumferential direction while preventing the packer body 11 from expanding in the longitudinal direction, so that the packer body 11 is drilled ( 20 to the inner wall of the more securely.

As described above, the pressurized grouting packer having an exponential function of the present invention is made of a diameter-molded body that maintains a small inner diameter until the packer body is inserted into the drilled hole and expands and expands upon contact with moisture in the drilled hole. By making it easy to insert the packer into the hole, it shortens the working time and increases the work efficiency.It also enables the rapid expulsion of the grout solution and the groundwater in the hole, and the continuous index function. In addition, it is an invention having a useful effect such as eliminating the injection of the foaming liquid and preventing the surrounding soil contamination and reducing the cost required to provide a mechanism for injecting the foaming liquid.

Claims (5)

In the packer body 11 is formed to have a plurality of through-holes 12 inserted into the drilling hole 20 excavated in the ground and drilled in the vertical direction in the cross section, The packer body (11) is pressurized packer having an exponential function, characterized in that made of a water-expandable resin made of a diameter-expanded molded body (A) having an outer diameter smaller than the inner diameter of the drilling hole (20). The pressure grouting packer having an exponential function according to claim 1, characterized in that a plurality of bend cores (13) are embedded in the longitudinal direction in the cross section of the diameter-molded article (A) constituting the packer body (11). According to claim 1, wherein the diameter-molded body (A) constituting the packer body (11) has a diameter size smaller than the punched hole 20 as a whole, the upper end is formed of a cylindrical body of the upper and lower strait of the outer diameter and small outer diameter Pressurized grouting packer that has an exponential function, characterized in that. The packer for pressure grouting of claim 1, wherein the through-holes 12 of the packer body 11 each have a small diameter at the upper end and a large diameter at the lower end. The upper and lower reinforcement plates 14 (15) of claim 1, wherein upper and lower ends of the packer body 11 are formed with a plurality of through holes 14a and 15a, respectively, to communicate with the through holes 12 of the packer body. 15, respectively, and the upper and lower reinforcement plates 14 and 15 have a plurality of long bolts 16 and nuts 17 fastened through the upper and lower reinforcement plates and the packer body 11, respectively. Pressurized grouting packer having an exponential function characterized in that it is fixed to.

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