KR100661126B1 - Cement grout device with inorganic soil stabilizer using modular packing system and its method - Google Patents

Abstract

A cement grout device using a system-convertible auto packer and an inorganic soil stabilizer and a method thereof are provided to prevent blocking of a rod in a pipe form for injection of chemical fluid, by mounting a protruded pilot bit to a lower center part. A cement grout device using a system-convertible auto packer and an inorganic soil stabilizer, for injecting and curing chemical fluid after drilling the ground, comprises a body part(10), a drilling part(20), a drilling/injection conversion part(31), and an injection part(40). The body part comprises a drill injection outer pipe(12), a drill injection inner pipe(13), and a coupling(11). The drilling part formed on a lower end of the body part drills the ground and passes chemical fluid or a drilling agent. The drilling/injection conversion part converts between injection processes. The injection part injects the chemical fluid into the ground and cures the chemical fluid. A cement grout method for the device comprises a drilling step, a drilling/injection conversion step, and a chemical fluid injection step.

Description

Cement Grout Device using Modular Packing System and Inorganic Solidifying Agent and Modified Packing System and its Method

1 is a schematic overall view of a grout device according to the present invention.

Figure 2 is a configuration and drilling process state of the drill injection internal and external appearance of the grout apparatus according to the present invention.

Figure 3 is a configuration and injection process state of the drill injection internal and external appearance of the grout apparatus according to the present invention.

Figure 4 is a chemical liquid mixing and injection process state of the drill injection interior and exterior in accordance with the present invention.

5A to 5H are detailed structural diagrams of the coupling, drill injection external appearance, water stopper, fixed hollow sleeve, moving hollow sleeve, reaming bit (passing bit), tip stop mixer, and pilot bit of FIG.

6A and 6B are structural comparison state diagrams of the pass-through bit and the blind bit of the reaming bit according to the present invention;

7 is a state diagram of applying a blind bit of reaming bits according to the present invention.

8 is a conceptual diagram of a grout device and a method thereof for a conventional drilling and injection system.

Explanation of symbols on the main parts of the drawings

10. Body 20. Perforation

31. Puncture injection switching part 40. Injection part

44. Packing section 45. Tip stop mixer

The present invention relates to a grout device and a method for injecting and solidifying the chemical solution after drilling the ground, and more particularly, perforating the ground by the drilling portion and passing the chemical solution or drilling water and the drilling process by the drilling injection conversion unit The present invention relates to a cement grout apparatus and a method using a system-switched automatic packer and an inorganic solidifying agent which converts from an injection process into an injection process or from an injection process into a drilling process and injects and solidifies a chemical solution in the perforated ground by the injection unit. .

Conventional grouting method was a method of installing a casing after drilling and injecting bentonite and water into the perforated ground.

However, the diluent, such as bentonite, used in the above method is used to prevent the loss of perforated water or collapse of the strata, which has the disadvantage that soil sedimentation occurs before injecting the diluent into the perforated ground. Clogging here refers to a phenomenon in which the diluent penetrates into the pores of the soil and hardens. The above method means that the pores of the earth and sand are hardened by the diluent before injecting the chemical solution for the grout, so that the chemical solution for the grout is not properly injected and cured.

Meanwhile, the grout method for the drilling and injection system injects ground water through the injection pipe as shown in FIG. 8, and rotates the rod to drill the ground through the drilling bit (Bit) at the bottom of the rod (FIG. 8 (a)). do. Inject a different type of chemical solution for grout into the perforated ground. One chemical liquid (A liquid) is injected into the injection tube, and another chemical liquid (B liquid) is injected between the outside of the injection tube and the inside of the rod to grout the inside of the perforated ground (FIG. 8 (b)).

However, when the viscous soil layer is drilled, the tip of the drill bit is opened, and the rod is frequently blocked as the clay mass is pushed in.

When injecting the chemical liquid, the chemical liquid must be injected into the ground after joining and mixing at the lower end of the rod, and thus, has a disadvantage in that a separate mixing and stirring mechanism must be provided, and there is no opening or closing means in the rod or the injection tube. There was a problem that the chemical solution is mixed inside the cured.

On the other hand, water glass was used as a curing agent used in the conventional grouting process. Since the composition of the water glass is water-soluble as Na ² O and nSiO ₂ , Na ⁺ ions are leached out after contact with water and lose order and reinforcement effect. There was a disadvantage that it is difficult to use in order. Sand-gel strength of water glass is 2.5 ~ 8kgf / cm ² , which is low value for use as ground reinforcement. In addition to water glass, an active silicate and an inorganic solidifying agent are used, but it has an expensive disadvantage.

Therefore, the technical problem to be achieved in the present invention, by mounting the pilot bit in the protruding state in the lower center can prevent the tubular rod for the chemical liquid injection is blocked.

As the drilling and injection switching unit is installed, the drilling and injection are made as a single equipment, and the equipment input cost is reduced, and the drilling and injection processes are switched by the operation of the drilling injection switching unit, so the progress of the process is fast.

The packing part is mounted inside the drill injection tube to act as an injection packer, and the automatic opening and closing of the packer by the simple pushing or pulling of the drill injection tube eliminates the hassle of using the packer.

Cement-based grout device using a system switchable automatic packer and an inorganic solidifying agent for injecting a chemical solution without additional means by forming a tip stop mixer inside the punching injection switching unit when the chemical liquid is injected into the perforated ground. To provide.

Cement-based grout apparatus using a system-switched automatic packer and an inorganic solidifying agent of the present invention for solving the above technical problem, in the grout apparatus for injecting and solidifying the chemical solution after drilling the ground, drill injection appearance (12) And a drill injection inner tube (13), and an end of the drill injection outer tube (10) having a coupling (11) formed thereon; and formed at a lower end of the body portion to puncture the ground and pass the chemical liquid or the drilling water. A perforation part 20; and a perforation injection conversion part 31 formed inside the upper part of the perforation part to switch to the injection process in the perforation process or to the perforation process in the injection process; and the inside of the perforation injection conversion part It is characterized in that it comprises an injection portion 40 for injecting and solidifying the chemical liquid in the perforated ground.

The perforation part 20 is formed in the lower end of the center of the pilot bit 21 for drilling the stratum and the reaming bit 22 formed in the lower end of the drill injection appearance to perforate the stratum. Provided is a cement grout device using a packer and an inorganic hardener.

The pilot bit 21 passes through the bit injection hole 21a at the end to inject punctured water or chemical liquid, and the reaming bit 22 passes through the bit discharge hole 22aa through which the punched water is discharged. Provided is a cement grout device using a system switch type automatic packer and an inorganic solidifying agent, characterized in that the mold bit 22a and the blind bit 22b are discharged to the outside.

The drilling injection switching unit 31 is connected to the outside of the pilot bit and provides a cement-based grout device using a system switchable automatic packer and an inorganic solidifying agent, characterized in that it moves up and down inside the reaming bit.

An anti-rotation pin 32 is installed outside the end of the drilling injection switching unit 31 to prevent rotation from inside the reaming bit during drilling. It provides a grout device.

The injection part 40 is formed inside the punching injection switching part to form a tip stop mixer 45 for mixing the chemical liquid, and is formed on the punching injection switching part to open and close the bit discharge hole 22aa to open the punching water and the chemical liquid. It provides a cement-based grout device using a system switchable automatic packer and an inorganic hardener, characterized in that the packing portion 44 to be injected.

The tip stop mixer 45 is provided with a mixer tube 45a inside the drilling injection switching unit, and the upper and lower middle cells 45b, 45c, 45d are positioned at the inside of the mixer tube with the cell injection holes 45ba, 45ca, 45da. Provided is a cement-based grout system using a system-switched automatic packer and an inorganic solidifying agent, characterized in that by mixing the number of chemicals to be injected.

The packing part 44 is attached to the inner side of the drill injection inner tube and has a fixed hollow sleeve 42 having an annular protrusion 42a formed thereon, and a hollow shape formed inside the fixed hollow sleeve, A water stopper 41 having an annular groove 41a fitted to the annular projection while being caught on the upper portion thereof, and a lower side of the fixed hollow sleeve and installed at the upper portion of the mixer tube, moves together with the mixer tube, and drill injection exterior and drill injection inner tube. It provides a cement-based grout device using a system switchable automatic packer and an inorganic hardener, characterized in that it comprises a moving hollow sleeve 43 through which the sleeve discharge hole 43a passes therebetween.

On the other hand, the cement-based grout method using a system-switched automatic packer and an inorganic solidifying agent is a grout method of injecting and solidifying a chemical solution after drilling the ground, the drilling step of drilling the ground and passing the drilling water; and in the drilling process It is characterized in that it comprises a perforated injection conversion step of switching to the injection process or the conversion from the injection process to the drilling process; and the injection step of injecting and solidifying the chemical liquid in the perforated ground.

The injection step provides a cement-based grout method using a system-based automatic packer and an inorganic solidifying agent, characterized in that the bucksilus hydrate is produced and quenched by mixing the solidifying agent with the cement hardening agent and then injecting it into the ground.

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

Figure 1 shows a schematic overall view of the grout apparatus according to the present invention. The ground is drilled by rotating the pilot bit 21 and the reaming bit 22 by the drive motor 12a. At this time, the water stored in the separate water tank is injected into the pilot bit by using the punching water injection pump 51. Unexplained 54 is an integrated tank that integrates water and slime.

After protruding the pilot bit by the puncturing injection switching unit 31 and injecting the chemical liquid by the injection unit 40 to solidify the perforated ground. At this time, the A chemical liquid is injected into the drill injection inner tube 13 by the A chemical liquid injection pump 52, and the B chemical liquid is injected into the drill injection outer tube 12 by the B chemical liquid injection pump 53. The injected chemicals A and B are mixed in the tip stop mixer 45 and injected into the ground through a pilot bit.

Figure 2 shows the configuration and drilling process state of the drill injection internal and external appearance of the grout apparatus according to the present invention, Figure 3 shows the configuration and injection process state of the drill injection internal and external appearance of the grout apparatus according to the present invention.

As shown in Figures 2 and 3, the cement-based grout device using the system switchable automatic packer and the inorganic hardener according to the present invention is to form a cloth formed on the lower end of the body by injecting and solidifying the chemical solution after drilling the ground; Perforate the ground by studying (20) and pass the chemical or drilling water. The drilling injection switching unit 31 is formed inside the upper portion of the drilling portion to switch from the drilling process to the injection process or to the drilling process from the injection process. The chemical solution is injected into the ground ground by the injection portion 40 formed inside the upper portion of the perforated injection conversion portion and solidified.

Body portion 10 is composed of a drill injection outer tube 12 and the drill injection inner tube 13, the coupling 11 is formed at the end of the drill injection outer tube. The drill injection appearance is connected to the rotary motor 12a to drill the strata. In the drilling of the strata, the drilling water is injected into the drill injection inner tube, and the drilling water is discharged between the drill injection outer tube and the drill injection inner tube or to the outside of the drill injection outer tube. The connecting rod 11a is connected to the upper portion of the drill injection exterior by a coupling. 5A shows the detailed structural state of the A-A cross section coupling of FIG. 3, and FIG. 5B shows the detailed structural state of the drill injection internal and external appearance on the B-B cross section of FIG.

The perforation section rotates with the connecting rod and perforates the ground and passes the chemical or the drilling water. The perforation part 20 is a double head (Double Head) consisting of a pilot bit and a reaming bit, the pilot bit 21 is formed at the lower end of the perforation injection switching unit to be described later to perforate the ground layer, the reaming bit 22 is drill injection It is formed at the lower end of the exterior to perforate the stratum.

In addition, a tip formed of an alloy of tungsten and a metal is formed at the lower end of the pilot bit and the reaming bit of the perforated part. The tip corresponds to the teeth that dig the strata. FIG. 5F shows a detailed structural state of reaming bits (passing bits) on the G-G cross section of FIG. 3, and FIG. 5H shows a detailed structural state of pilot bits on the J-J cross section of FIG.

The pilot bit 21 penetrates through the bit injection hole 21a to inject water for drilling and chemical solution. The pilot bit is rotated in the non-protruding state during the drilling of the ground to drill the ground and outflow of the drilling water, and when the chemical is injected into the drilled ground, the pilot bit is protruded by the drilling injection switching unit to be described later, and the chemical liquid is injected from the drilling state. Is switched.

The bit injection hole is formed to be inclined inward so that the injection is easy and the backflow is not easy when the drilling water or the chemical liquid is injected. When the injection of the chemical liquid serves as a chemical liquid passage nozzle for injecting the mixed chemical liquid into the ground in the final step (S4; Figure 4) in the cell to be described later.

The pilot bit prevents clogging of the drill injection internal and external or reaming bits during the drilling of clay soils, and pioneers the boring track by combing small diameter (Φ50mm) gravel to the side. The pilot bit is positioned in the hard strata for centering by small diameter drilling. Regardless of the type of strata by the pilot bit, by expanding the pore size perforated with a small diameter, the hard strata are broken into small particles, thereby improving the efficiency of drilling.

The reaming bit is bound by a thread at the tip of the drill injection outer shell and rotates with the drill injection outer shell as the rotation axis. The pilot strata will build up the target stratum with small diameters.

The reaming bit 22 is the first and second embodiment of the pass-through bit 22a through which the punching water is discharged through the bit discharge hole 22aa penetrated at the end, and the blind bit 22b through which the punching water is discharged to the outside. There is an example.

6A and 6B show a structure comparison state between a passing bit and a blind bit of a reaming bit according to the present invention, and FIG. 7 shows an application state of a blind bit with a reaming bit according to the present invention.

Passing type bits are for internal circulation of perforated water, and are used for circulation systems that are applied during stratification, which is highly likely to collapse, such as sandy soils. The bit discharge hole is formed to be inclined inward so that the punched water is easily discharged at the time of opening and does not penetrate the sleeve discharge hole of the mobile hollow sleeve to be described later when closed.

The passing bit is circulated between the drill injection internal and external appearance of the double pipe to prevent contact with the target strata and to prevent the collapse or loosening of the strata such as sandy soil. Preventing the loss of perforated water in the sandy soil layer and eliminating the use of diuretics such as bentonite, which is used to prevent the loss of perforated water in the existing construction methods or to prevent stratum decay, Clogging).

As shown in FIG. 6B, the blind bit is used for external circulation of perforated water and is not collapsed like viscous soil, but is used for circulation system to increase the penetration effect of the chemical liquid by loosening or washing with perforated water.

The blind bit passes the punched water between the drill injection envelope and the punched hole wall to separate or loosen the fine soil from the hole wall to facilitate subsequent chemical injection.

The perforation part is a double head composed of a pilot bit and a reaming bit, and prevents the tip of the drill injection interior and exterior from being blocked. In the existing construction method, the block injection inside and outside of the drill injection is frequently clogged as the clay mass is pushed in when drilling the viscous soil by using one bit with the tip of the bit open. To solve the problem.

Perforations improve the drilling efficiency of hard soils. The protruding pilot bit drills through the small diameter and then reams with the reaming bit to expand the solid strata without obstacles.

The perforations switch the circulation system of perforated water according to the soil quality. Reaming bits consisting of two types (passing bits and blind bits) can be replaced according to the soil so that it can efficiently cope with the collapsed layer during drilling.

The puncture injection switching unit 31 is connected to the outside of the pilot bit and moves up and down inside the reaming bit. The anti-rotation pin 32 is installed outside the end of the drilling injection switching unit 31 to prevent the inside of the reaming bit from rotating.

The anti-rotation pin is a fixing device that allows the pilot bit and the reaming bit to rotate at the same time by binding the pilot bit with the reaming bit during the rotation (punching) of the drill injection inside and out. Inside the reaming bit described above, a pin coupling groove 22ab is formed in the groove to be combined with the anti-rotation pin.

The puncturing injection switching unit is to be described later, the tip stop mixer of the injection unit is installed inside the puncturing injection switching unit, and the packing unit is located on the upper portion of the puncturing injection switching unit, and moves simultaneously with the shank simultaneous tip stop mixer and packing unit of the pilot bit.

The pushing state of the drill injection tube is retracted into the drill injection exterior to convert into the drilling system, and the pulling state of the drill injection tube is converted to the injection system by protruding the drilling injection transition.

The drilling injection switching unit moves up and down by the up and down operation of the drill injection pipe, and at the same time, the packing unit is operated to control the flow of drilling water or chemical liquid. In the retraction or protrusion operation of the drilling injection switching unit, the packing unit which is tied to the upper part is interlocked and placed under the closed or open state of the bit discharge hole 22aa.

Injection portion 40 is the tip stop mixer 45 is formed inside the perforation injection switching unit to mix the chemical liquid. The packing part 44 is formed on the upper part of the punching injection switching part to inject the punching water or the chemical liquid by opening and closing the bit discharge hole 22aa.

The tip stop mixer 45 is provided with a mixer tube 45a inside the drilling injection switching unit, and the upper and lower middle cells 45b, 45c, 45d are positioned at the inside of the mixer tube with the cell injection holes 45ba, 45ca, 45da. B) Mix the chemicals injected by installing with different numbers.

Figure 4 shows the chemical liquid mixing and injection process state of the drill injection and exterior appearance according to the present invention. FIG. 5G shows a detailed structural state of the tip-stop mixer on the H-H cross section of FIG.

The tip stop mixer is a non-powered mixing device that mixes completely when the unmixed chemicals (A and B chemicals) pass through four stages of mixing through the upper and lower cells. The tip stop mixer is mounted inside the drilling injection switch and operates in the same manner as the drilling injection switch. The chemical A is a cement hardener and an inorganic quickener, and the chemical B is water and an inorganic modifier.

The tip stop mixer is a cell-type mixer. The unmixed chemical flowing into the mixing stage 1 (upper side of the upper cell) passes through the upper middle cell (mixing stages 2 and 3) and merges with each other. During the sorting process, the mixture is finally introduced into the fourth mixing stage (lower side of the lower cell) and then injected into the ground through the pilot bit.

The packing part (Modular Packing System) is an automatic opening and closing device of the chemical liquid passage in the drill injection tube, it is composed of a water stopper, fixed hollow sleeves and mobile hollow sleeves. The fixed hollow sleeves are fixed, and the water stopper and the moving hollow sleeves are shanghai together with the drilling injection switch and the tip stop mixer.

When pushing the drill injection pipe, that is, when drilling the ground, the fixed hollow sleeve and the moving hollow sleeve are in close contact, and the moving hollow sleeve and the reaming bit are spaced apart. In this case, the drilling water flows out through the bit injection hole of the pilot bit, and then flows out through the bit discharge hole of the reaming bit and through the sleeve discharge hole of the moving hollow sleeve between the drill injection inner and outer surfaces.

FIG. 5C shows a detailed structural state of the water stopper on the C-C cross section of FIG. FIG. 5D shows a detailed structural state of the fixed hollow sleeve on the D-D cross section of FIG. 3. FIG. 5E shows the detailed structural state of the moving hollow sleeve on the cross section F-F in FIG. 3.

The packing portion 44 has a fixed hollow sleeve 42 is attached to the middle inner side of the drill injection inner tube and the annular projection 42a is formed on the upper portion thereof.

The fixed hollow sleeve is fixed by welding or screw connection in the drill injection pipe, and has no relation to the vertical operation of the drill injection switch, the water stopper and the moving hollow sleeve. The fixed hollow sleeve catches the central axis of the packing portion and prevents the drilling water from leaking into the water stopper.

In the packing part, a water stopper 41 is formed inside the fixed hollow sleeve in a hollow shape and is attached to the top end of the packing part. An upper portion of the water stopper is hooked to an upper portion of the fixed hollow sleeve, and an annular groove 41a corresponding to the annular protrusion is formed in the recess.

When pulling the drill injection tube, it closes to the fixed hollow sleeve to prevent mixing with the chemical A after the backflow of the chemical B. The fixed hollow sleeve prevents the passage of fluid when joining the fixed hollow sleeve by the annular groove.

The packing part is provided with a moving hollow sleeve 43 at the upper side of the fixed hollow sleeve and installed at the top of the mixer pipe 45a, and moves together with the mixer pipe, and a sleeve discharged between the drill injection outer tube and the drill injection inner pipe on the outer side of the hollow hollow sleeve. The ball 43a is penetrated. The sleeve discharge hole is formed to be inclined inward so that the punched water is easily discharged upon opening, and the bit discharge hole is closed by shifting the sleeve discharge hole without being penetrated with the bit discharge hole of the passing type of reaming bits.

The moving hollow sleeve is attached to the bottom end of the packing part and moves up and down simultaneously with the up and down operation of the drilling injection switching part. When the drilling injection switching part is pushed in, the moving hollow sleeve and the reaming bit are spaced apart and pass through the drilling water including the slime introduced through the reaming bit. (Perforation state: the open state of the sleeve discharge hole and the bit discharge hole; see FIG. 2)

In the state in which the drilling injection switching portion is pushed out (conversion to the injection system; see FIG. 4), the moving hollow sleeve and the reaming bit are brought into close contact with each other to close the sleeve discharge hole and the bit discharge hole, thereby preventing the passage of the chemical liquid (B liquid).

Looking at the cement-based grout method using the system switch type automatic packer and the mineral-based hardener according to the present invention made as described above, the system switch type automatic packer and the mineral-based hardener.

First, the drilling step is to drill the ground and pass the drilling water.

When the drill injection tube is pushed, that is, when the ground is drilled, the water stopper, the moving hollow sleeve, the drilling injection switching unit, and the tip stop mixer move upward, and the anti-rotation pin is combined with the pin coupling groove so that the pilot bit is connected with the reaming bit. Are integrally combined. At this time, when the drill injection inside and outside rotates, the pilot bit and the reaming bit rotate together to drill the ground.

In addition, the fixed hollow sleeves and the mobile hollow sleeves are in close contact with the movable hollow sleeves and the reaming bits. At this time, the punched water flows out through the tip battery mixer through the bit injection hole of the pilot bit, and then passes through the bit discharge hole of the passing bit and flows through the sleeve injection hole of the moving hollow sleeve to between the drill injection inner and outer surfaces. In this case, when the reaming bit is a blind bit, the drilling water flows out of the drill injection exterior (FIG. 7).

The next drilling injection conversion step is a step of converting from the drilling process to the injection process or from the injection process to the drilling process.

As shown in FIG. 3, the state in which the drilling injection switching unit is switched from the drilling system to the injection system is pushed out so that the sleeve and the discharge hole are in close contact with the moving hollow sleeve and the reaming bit, thereby allowing the passage of the chemical liquid (B liquid). Prevent.

On the contrary, as shown in FIG. 2, when the drilling injection switching unit is switched from the injection system to the drilling system, the moving hollow sleeve and the reaming bit are spaced apart, and thus the sleeve discharge hole and the bit discharge hole are opened and introduced through the reaming bit. Pass the drilled water, including the slime.

Since the drilling and injection process is switched to the injection and drilling system by the drilling injection switching part and the packing part according to the pushing or pulling of the drill injection pipe, the process is simplified because the drilling and injection process is completed as a single equipment, and the burden of equipment input cost is increased. Is reduced. The progress of the process is fast because the internal and external appearance of the drill injection is the same system. It is economical because there is no burial of injection pipe as in L.W method.

The next injection step is to inject and solidify the chemical solution in the perforated ground.

When the drill injection tube is pulled, that is, when the chemical is injected, the water stopper, the moving hollow sleeve, the hole injection switching unit, and the tip stop mixer are moved downward so that the anti-rotation pin is released from the pin coupling groove so that the pilot bit Departure.

The water stopper and the fixed hollow sleeve are in close contact, the fixed hollow sleeve and the movable hollow sleeve are spaced apart, and the moving hollow sleeve and the reaming bit are in close contact. (FIG. 3) In this case, the chemical A injected into the drill injection tube and the injection B are injected into the drill injection tube. The chemical liquid meets at the lower part of the water stopper and the upper part of the moving hollow sleeve to flow into the hollow of the moving hollow sleeve (mixing step 1; FIG. 4).

The chemicals A and B are being mixed while passing through the cell injection hole 45ba of the upper cell of the tip stop mixer. (Mixing step 2; FIG. 4) The chemicals of drug A and B are being mixed with the middle cell of the tip stop mixer. Mixing while passing through the cell injection hole (45ca) (mixing step 3; Fig. 4) Mixing the chemicals A and B while passing through the cell injection hole (45da) of the lower cell of the tip stop mixer (mixing 4). Step 4)

The mixed chemicals A and B are injected into the ground through the bit injection hole of the pilot bit after passing through the tip cell mixer (FIG. 4).

When pulling the drill injection tube, it closes to the fixed hollow sleeve to prevent mixing with the chemical A after the backflow of the chemical B. The fixed hollow sleeve prevents the passage of fluid when joining the fixed hollow sleeve by the annular groove.

The packing part acts as a Grout Packer that is installed inside and outside the injection tube in the existing method, and is opened and closed automatically according to the pushing or pulling state of the drill injection inside and outside, so that the separate action of installing and removing the existing packer Is not required. It is easy to install and dismantle for the purpose of opening and closing, so the step length of Grout can be adjusted freely immediately, so the process is quick.

The grout reagent in the conventional 2.0 shot system is inevitably joined and mixed at the lower end of the drill injection inner and outer tubes, and then injected into the ground, so that proper mixing and stirring mechanism is required. However, the tip stop mixer of the present invention is mounted on the distal end of the injection tube, and is a non-powered chemical liquid that sufficiently mixes the A and B chemicals by forcibly joining and dividing the A and B chemicals in the process of passing the upper and lower cells of the mixing step 4. It is a mixing device.

Meanwhile, the chemical liquids mixed in the tip stop mixer and injected into the ground will be described as follows.

_{NaAlO 3, Al6SiO 3, 12CaO7Al 2} O 3 and 4CaO ₃ Al ₂ O _3, and according to the So ₃ mineral agent (MPS: Material of Ground Solidification) the beoksil Russ hydrate (6CaO Al ₂ O ₃ by the addition of the curing agent of cement 3So ₃ 31H ₂ O) is generated and quenched.

Tip stop mixer is a mixing and injecting device of cement hardener and MPS.

MPS chemicals are categorized into six types (named) of the MPS series with different solidification rates according to the type of soil and groundwater (see Table 1).

The grout material of the MPS process is MPS as the main material, and cement is mixed with water as an auxiliary functional material and divided into A drug (quick) and B drug (adjustment). (See Table 2) Table 2 shows the standard compounding ratios of the liquid A and the liquid B.

MPS forms an effective sand-gel by varying the mixing ratio depending on the outside air temperature by type (see Table 3). Table 3 shows the adjusted mixing ratio according to the outside temperature.

The solidifying agent (fastener) used in the present invention is called MPS (Material of Ground Solidification). MPS is a natural mineral and a certain manufacturing process to produce a calcined mineral in the following clinker state.

<Na AlO ₂ , Al ₆ SiO ₁₃ , 12CaO ₇ Al ₂ O ₃ , 4CaO ₃ Al ₂ O ₃ SO ₃ >

The calcined material is a powder crushed into fine particles having a specific surface area of 4,000 to 6,000 cm ² / g.

Inorganic-based solidifying agent (MPS) with specific surface area of 4,000 ~ 6,000cm ² / g is hydrated and quenched when it is mixed with cement and water to give needle-shaped bucksilence hydrate (6CaO Al ₂ O ₃ 3SO ₃ 31H ₂ O). Form.

Table 1. Application Types of Chemical Solution by Soil and Groundwater Type

Groundwater condition Target strata Gel time (seconds) TYPE Remarks Kinds Flux division Title fresh water Slow Silt floor 45 ~ 120 Complete MPS-1 usually Sand layer 20-30 Quickly MPS-2 speed Gravel layer 5-15 Beginner MPS-3 sea water Slow Silt floor 45 ~ 120 Complete MPS-4 usually Sand layer 20-30 Quickly MPS-5 speed Gravel layer 5-10 Beginner MPS-6

Table 2. Standard Mixing Ratios by Type

Title A amount (adjustment agent) B amount (payment) Remarks A ash OPC water Water ratio (%) B ash water Water ratio (%) MPS-1 30 70 167 167 50 182 364 MPS-2 30 70 167 167 75 173 230 MPS-3 30 70 167 167 100 164 164 MPS-4 30 70 167 167 60 178 297 MPS-5 30 70 167 167 80 171 214 MPS-6 30 70 167 167 120 156 130 Unit: KG (OPC, A / B liquid), ℓ (water), ㎥ (total injection material)

* At room temperature, the compounding ratio considering packaging relationship. * MPS-4,5,6 was kneaded with seawater instead of water, and as a result, gel formation is relatively good even with seawater. Judging. * The gel time of the compounding ratio is the middle level of Table 1.

Table 3. Adjusting compounding ratio according to outside temperature

Title Temperature (℃) Compound ratio A amount B amount Outside air water A ash OPC water Water ratio (%) B ash water Water ratio (%) MPS-1 7 5 30 70 167 100 200 260 22 20 30 70 167 100 290 420 28 27 30 70 167 100 360 590 MPS-2 7 5 30 70 167 100 170 180 22 20 30 70 167 100 200 250 28 27 30 70 167 100 230 300 MPS-3 7 5 30 70 167 100 130 140 22 20 30 70 167 100 140 180 28 27 30 70 167 100 185 210 MPS-4 7 5 30 70 140 100 185 210 22 20 30 70 140 100 190 215 28 27 30 70 140 100 180 200 MPS-5 7 5 30 70 140 100 150 160 22 20 30 70 140 100 160 180 28 27 30 70 140 100 160 180 MPS-6 7 5 30 70 - - - No gel 22 20 30 70 140 100 125 130 28 27 30 70 140 100 125 140

* In order to determine the tendency of gel formation, the data was fixed and the water ratio within the range of gel time shown in Table 1 was tested. In the case of MPS-1, the gel is 45 seconds and 260 days when water is 200 ° C at atmospheric temperature of 7 ° C. 120 seconds (4, 5 and 6 were tested with seawater).

When MPS is mixed with water in ordinary Portland cements, bucksilus hydrate is produced, resulting in high strength (34-66 kgf / cm 2) by densifying the cement binding structure. After the cured product is formed, it is water-insoluble and there is no component dissolution phenomenon and maintains a permanent order function. Water Pollution No harmful substances such as Cu, Pb, As, Hg, Cd, Zn and Cr + 6 are generated.

As described above and illustrated with reference to a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as shown and described as such. Rather, it will be apparent to those skilled in the art that many changes and modifications to 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.

As described above, the cement-based grout apparatus and method using the system-switchable automatic packer and the inorganic solidifying agent of the present invention have a perforated part formed in a double structure by pilot bits and reaming bits, thereby improving the drilling efficiency and using the reaming bits. According to the embodiment, it is possible to respond appropriately according to the stratum state by switching the circulation system of perforated water as follows.

Among reaming bits, passing type bits can puncture strata that are highly decayable, such as sandy soil, for internal circulation of perforated water. Increasing the penetration of chemicals by relaxation or washing with water.

The pilot bit prevents blockage of the drill injection tube and reaming bit during clay or hard ground excavation and improves drilling efficiency by combing the gravel laterally.

As the drilling and injection switching unit is installed, the drilling and injection are made as a single equipment, and the equipment input cost is reduced.

When the punching injection switching unit is pushed, the punching injection switching unit retracts and enters the drilling system, and when the punching injection switching unit pulls, the drilling injection switching unit protrudes and is converted into the injection system.

The packing part of the injection part is mounted inside the drill injection tube to serve as an injection packer, and the opening and closing operation is quickly performed at each grout step. The length of the grout is adjusted freely, and the automatic opening and closing of the packer is avoided by the simple pushing or pulling of the drill injection tube to avoid the hassle of installing and removing the packer.

Perfect mixing of the chemicals is achieved by attaching the tip stop mixer to the inside of the drilling injection switching unit. The chemical liquid passing through the upper and lower cells of the four different stages of the mixing center point is mixed into the ground after being sufficiently mixed during the sorting-consolidation process. The chemical liquid can be efficiently mixed without using a separate power or device.

As the cement-based curing agent forms a bucksilus hydrate by the inorganic curing agent, it exhibits a high-strength solidification state of about 50 kgf / cm ² , and the cured body maintains a semi-permanent state because there is no dissolution and deterioration. Injecting the chemical solution prevents trial and error due to the quantified mixing ratio according to the outside temperature, and does not discharge water environmental pollutants.

Claims (10)

In the grout apparatus for injecting and solidifying the chemical after drilling the ground, A drill injection outer tube 12 and a drill injection inner tube 13, the body portion 10 having a coupling 11 formed at an end of the drill injection outer tube; A perforated part 20 formed in the lower end of the body part to perforate the ground and pass the chemical liquid or perforated water; A perforation injection switching unit 31 formed in the upper part of the perforation part to convert from the perforation process to the injection process or to the perforation process in the injection process; And Cement-based grout apparatus using a system switch type automatic packer and mineral-based superplasticizer, characterized in that it comprises an injection portion 40 formed in the upper inside of the perforated injection conversion portion to inject and solidify the chemical liquid in the perforated ground. The method according to claim 1, The perforation part 20 is formed in the lower end of the center of the pilot bit 21 for drilling the ground layer, and the drill injection external appearance is formed in a dual structure of the reaming bit 22 for drilling the ground layer. Cement-based grout system using system switchable automatic packer and mineral-based hardener. The method according to claim 2, The pilot bit 21 is a bit injection hole (21a) is penetrated through the end of the drilling water or chemical solution is injected, The reaming bit 22 is composed of a pass-through bit 22a through which the punching water is discharged through the bit discharge hole 22aa penetrated at the end, and a blind bit 22b through which the punching water is discharged to the outside. Cement-based grout system using a switchable automatic packer and an inorganic hardener. The method according to claim 1, The perforation injection switching unit 31 is connected to the outside of the pilot bit cement-based grout system using a system switchable automatic packer and inorganic solidifying agent, characterized in that the movement inside and outside the reaming bit. The method according to claim 4, An anti-rotation pin 32 is installed outside the end of the drilling injection switching unit 31 to prevent rotation from the inside of the reaming bit during drilling. Grout device. The method according to claim 2, The injection portion 40 is formed inside the puncture injection switching unit and the tip stop mixer 45 for mixing the chemical liquid, Cement system using a system switch type automatic packer and inorganic solidifying agent, characterized in that formed in the upper portion of the punching injection conversion part is made of a packing unit 44 for injecting the punching water and the chemical liquid by opening and closing the bit discharge hole (22aa) Grout device. The method according to claim 6, The tip stop mixer 45 is provided with a mixer tube 45a inside the hole injection switching unit, and the upper and lower middle cells 45b, 45c, and 45d of the cell injection holes 45ba, 45ca, and 45da are installed inside the mixer tube. Cement-based grout device using a system-switched automatic packer and an inorganic solidifying agent, characterized in that the chemical solution is injected by being installed in different positions or numbers. The method according to claim 6, The packing portion 44 is fixed to the hollow sleeve 42 is attached to the inner middle of the drill injection tube and the annular projection (42a) is formed on the upper portion, A water stopper 41 having a hollow shape formed inside the fixed hollow sleeve and being caught by an upper portion of the fixed hollow sleeve and having an annular groove 41a adapted to the annular projection; It is installed on the upper side of the mixer tube while the fixed hollow sleeve is moved to the mixer tube, characterized in that it comprises a moving hollow sleeve 43 through which the sleeve discharge hole (43a) passing between the drill injection outer tube and the drill injection inner tube Cement grout system using a switchable automatic packer and an inorganic hardener. In the grout method of injecting and solidifying the chemical solution after drilling the ground, Drilling step of drilling ground and passing drilling water; A perforation injection conversion step of converting the perforation process into the injection process or converting the injection process into the perforation process; And Cement-based grout method using a system-based automatic packer and mineral-based solidifying agent comprising the injection step of injecting and solidifying the chemical liquid in the perforated ground. The method according to claim 9, The injecting step is a cement-based grout method using a system conversion type automatic packer and inorganic solidifying agent, characterized in that by mixing the solidifying agent and the cement-based curing agent and injecting into the ground to produce a bucksilus hydrate.

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