KR20150079070A

KR20150079070A - Method for reinforcing soil and device to perform the method

Info

Publication number: KR20150079070A
Application number: KR1020130169054A
Authority: KR
Inventors: 강상욱; 유지훈; 김영철; 우병국
Original assignee: (주)아리터
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-08

Abstract

The present invention relates to a ground reinforcement method and a ground reinforcement device for realizing the same, which comprises boring a groove in a ground (S10); A step S11 of inserting the mortar 121 into the groove and injecting the mortar 121; Stopping the ground of the predetermined radius d2 by centering the file (S12); A step (S13) of injecting a solidifying agent into the stopped ground; And the solidifying agent is solidified (S14). As a result, the entire circumference of the pile is improved and reinforced without any portion that has not been improved as in the past, and ultimately the supporting force of the ground and the pile So that it remains constant.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground reinforcement method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for reinforcing a ground, more particularly, to a ground reinforcement method in which the reinforcing efficiency is remarkably increased while strengthening the circumference of a ground to which a pile is inserted, and a ground reinforcement apparatus .

Generally, soft ground refers to the case where the ground itself can not withstand the load from the superstructure or the predicted settlement exceeds the permissible value, such as soft clay, loose sand, and organic soil. These soft clays If roads, bridges, buildings, etc. are left on the ground composed of organic soil, the total cross section settlement becomes excessive, and there is a problem of safety due to insufficient bearing capacity. In recent years, garbage has become an important environmental problem, There is also a plan to utilize the constructed ground as the basis of road or building, and it is expected that excessive settlement and lack of bearing capacity are also required in these grounds.

In order to solve the stability and settlement problem of the foundation based on such soft ground, the method of reaching the support layer (PILE using method), which is commonly used, is to construct a steel pipe file, a PHC file, a PC file, And the RC file are constructed by the type method (blow, vibration) or the filling method, and such a file is successively blown after the blow according to the state of the ground, and after being suitably hit, The file is appropriately cut and the end portion thereof is reinforced. Hereinafter, the reinforcement of the end portion of the file is referred to as a head arrangement, and after such head portions are arranged and reinforced, And the foundation pavement is laid, and the pavement pile and the poured concrete are stably supported by the structure formed thereby.

On the other hand, the files inserted into the ground are designed considering the degree of grounding in the installation area and the vertical load and the horizontal load which are received after installation. Therefore, the file is sufficiently supported for the external force.

However, if the condition of the foundation ground deteriorates due to the passage of time and changes in the surrounding ground, the adherence between the ground and the pile deteriorates, resulting in a serious problem of not being able to cope with the vertical load and the horizontal load.

In order to improve this, conventionally, as disclosed in Korean Registered Patent No. 1144505 (the name of the invention: foundation ground stabilization method combined with a top file and a steel pipe file), a top file is inserted into an open top of a file, The ground was maintained firmly to prevent differential settlement.

Also, as disclosed in Japanese Patent Application Laid-Open No. 2011-117215, grooves for inserting piles are formed on the ground, and these grooves are drilled in a hopper having a wide upper portion and a narrow lower portion.

In addition, as shown in FIGS. 1A to 1C, after the construction, the ground around the pile 10 is separated into a plurality of improved grounds 20 having a certain area of cubic meters (m ³ ) . At this time, the modified ground 20 is formed by mixing solidifying material such as cement mortar together with soil while excavating the ground, and generally has a substantially circular or rectangular shape.

However, since the file 10 is prevented from being damaged during the improvement of the ground and the ground improvement operation is performed by avoiding the overlap between the improved grounds 20, wide unimproved areas not improved around the file 10 are generated , Which ultimately has a problem that the risk of destruction of the file 10 remains.

In this case, if the insertion of the file 10 is delayed even after a slight delay, the modified ground 20 is solidified. Therefore, It became a big problem in insertion work.

KR1144505 10 JP 2011-117215 A

In order to solve the above-mentioned problem, the present invention, which is devised to solve the above-mentioned problems, completely stirs the solidifying agent while restricting the surrounding ground while rotating the file with the eccentric point, The present invention aims to provide a ground reinforcement method and a ground reinforcement device for realizing the ground reinforcement method in which the entire periphery is improved and ultimately the vertical and horizontal support forces of the ground and the pile are maintained firmly even after a long period of time.

According to another aspect of the present invention, there is provided a ground reinforcing apparatus for reinforcing a surrounding ground on which a pile is installed, the apparatus comprising: a hollow rotating body installed to rotate in a pile; And a blade protruding from the rotating body by a predetermined length to stop the ground.

Here, the rotating body is fitted so as to enclose the file, and is installed so as to move along the file, and the file is the center of rotation of the rotating body.

In addition, when a file is inserted into a groove formed in the ground and the mortar is injected between the groove and the groove, when the rotating body moves from the ground to the depth where the mortar is injected, the inner diameter of the rotating body is smaller than the outer diameter of the mortar, When a plurality of blades are mounted on the entire outer periphery or the rotating body moves from the ground to the bottom of the groove, the inner diameter of the rotating body is larger than the outer diameter of the mortar, and a plurality of blades are mounted on the upper portion. And a small-sized blade is mounted.

It is further characterized by further comprising a fastening member which grips the outwardly bent flange on the upper part of the rotating body and transmits the force of the power source to rotate the rotating body.

Here, a receiving space for receiving the solidifying agent is formed along the outer wall of the rotating body, a passage is formed in the coupling member to communicate with the receiving space, an injection tube is connected to inject the solidifying agent into the passage, The passage is formed in the entire outer wall of the fastening member, and the outlet connected to the receiving space is formed of a plurality of slots.

In addition, the rotating shaft connected to the power source is directly fastened to the rotating body, and the inner flow path of the rotating shaft and the injection tube installed to discharge the solidifying agent to the outside are installed so as to communicate with each other so that the solidifying agent flows, .

The rotating body and the file are characterized in that the coupling protrusion protruded from the outer surface of the pile is coupled to the coupling groove formed on the side surface of the rotating body so as to be able to engage / disengage.

Further, the blade is characterized in that the rear portion is inclined downward at a certain angle?

The rotating body is formed with a coupling protrusion for detaching the blade to replace the blade.

Further, the inner wall of the hollow body of the rotating body is spaced apart from the outer wall by a predetermined length (L1).

Therefore, the pile is sandwiched between the inner wall and the outer wall, and the inner wall is inserted into the hollow pile, and together with the pile, serves as the center of rotation of the rotating body.

Meanwhile, the ground reinforcement apparatus according to the present invention further comprises an injection pipe installed in the rotating body and arranged to inject the solidifying agent into the stopped ground.

Here, the injection tube is mounted along the inner surface or the outer surface of the rotating body, and discharges the solidifying agent to the blade side.

Further, the injection tube is branched to the lower surface of the blade, and has a branch pipe formed with a discharge port.

The branch pipe extends in the longitudinal direction of the blade and has an outer diameter equal to or smaller than a thickness t formed between the front portion and the rear portion due to the inclined angle [theta] of the blade.

Meanwhile, in the method for reinforcing the ground using the ground reinforcement apparatus according to the present invention, a step (SlO) of drilling a groove in the ground; Inserting a file into the groove and injecting mortar (S11); Stopping the ground of the predetermined radius d2 by centering the file (S12); A step (S13) of injecting a solidifying agent into the stopped ground; And a step (S14) of solidifying the solidifying agent.

Here, in the step S12 of stopping, the blade is rotated to center the file, and the ground within the predetermined radius d2 is searched.

Further, in the step S12 of stopping, the shape of the upper light-tight narrowing portion is formed to be narrower and narrower at a wide upper portion.

In the step of injecting the mortar (S11), the mortar is injected between the groove and the pile and is injected to the depth of the ground to be stopped at the bottom of the groove, or is injected from the bottom of the groove to the ground.

As described above, according to the present invention, when a ground is pierced and a file is inserted, a solidifying agent is injected while stopping the upper ground around the pile with the pile as the center, The entire circumference of the standing pile is improved and reinforced, and ultimately the supporting force of the ground and the pile reinforced is always maintained constant.

Further, the rotating body is inserted into the file and rotated, and the surrounding ground of the file is stopped by the blade, so that the entire periphery of the file is stopped by the center.

Also, while the ground is stopped by the blade, a solidifying agent is injected and mixed with the soil to reinforce the ground, so that sufficient agitation of the solidifying agent and soil is naturally achieved by the blade.

Further, by changing the blade from the rotating body, the range of improvement of the surrounding ground can be changed according to the diameter and the length of the pile, which has an effect of obtaining an optimum range of improvement according to the specification of the pile.

In the case of a polygonal file including a quadrangle, the inner circumference of the polygon can be rotated around the inner periphery of the rotating body. This makes it possible to rotate the file around the periphery The ground can be improved and reinforced.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be interpreted.
Figs. 1A to 1C are plan views schematically showing an improved ground obtained by improving a conventional pile around a file.
2 is a flowchart showing a ground reinforcement method according to the present invention.
3A to 3E are process diagrams of the ground reinforcement method according to the flowchart of FIG.
FIG. 4 is a view showing an embodiment of FIG.
FIGS. 5A to 5C are diagrams showing a state where different kinds of files are inserted in FIG. 3E. FIG.
6 is a perspective view schematically showing a ground reinforcement apparatus for implementing a ground reinforcement method according to the present invention.
7 is a side sectional view showing the coupling structure between the ground reinforcement apparatus and the file shown in Fig.
8 is a side cross-sectional view showing another embodiment of the rotating body and the fastening member in Fig.
FIG. 9A is a perspective view showing the blade shown in FIG. 6; FIG.
Figures 9B and 9C are side and perspective views, respectively, of the blade and infusion tube shown in Figure 6;
10 is a side view showing a modified coupling structure of a rotor and a blade in the ground reinforcement apparatus shown in Fig.
11 is a side sectional view showing a modified example of the rotating body shown in Fig.
12A to 12C are various use state diagrams of the ground reinforcement apparatus of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

FIG. 2 is a flowchart showing a ground reinforcement method according to the present invention, FIGS. 3A to 3E are process charts of the ground reinforcement method according to the flowchart of FIG. 2, FIG. 4 is a view showing an embodiment of FIG. And FIG. 5C is a diagram showing a state in which files of different types are inserted in FIG. 3E.

As shown in FIG. 2, the ground reinforcement method according to the present invention first punctures the ground (S10). The grooves 110 for installing the pile 100 on the ground are drilled by using a piercing apparatus such as an earth drill or an auger at a place where the pile 100 is to be installed.

Next, the pile 100 is inserted into the perforation, and the mortar 121 is injected to a predetermined height (S11). The file 100 is inserted into the groove 110 of the ground and the mortar 121 is injected into the gap between the outer surface of the file 100 and the groove 110 and cured. At this time, the mortar 121 is injected only to the depth for the grounding operation in the next process. This is because the suspension of the next process improves while stopping the ground at a certain depth.

In the gap between the outer surface of the pile 100 and the groove 110, the mortar 121 having a predetermined height is injected, and the soil mixed with the solidifying agent is filled in the ground stopping operation. Therefore, the injection height of the mortar 121 in the mortar portion 120 is not necessarily measured accurately.

Next, a stop operation is performed on the upper ground at a predetermined height with the file 100 as the center of gravity (S12). As shown in FIGS. 3C and 3D, the ground is broken by the plurality of blades 320 rotating the file 100 centripetally and stopped. Here, the depth D2 of the improved ground 200 to be improved by the stopping operation is about 5 to 10 times the diameter D1 of the pile 100, as shown in Fig. 3E. This depth D2 is usually the depth under which the file 100 is subjected to a vertical load and a horizontal load, and it is preferable that the ground is improved by this depth D2, and of course it can be made thinner or deeper.

Also, the ground of the predetermined diameter d2 is stopped with the pile 100 as the center of gravity, which is possible by rotating the plurality of blades 320 with the pile 100 as the center. Therefore, since the modified ground 200 according to the present invention forms a circle having a certain radius d2 around the pile 100, the planar shape of the ground improved as in Figs. 1A and 1B It is possible to completely improve the entire periphery of the file 100 by completely removing the unmodified portion around the file 100 as in the conventional case. That is, as shown in FIG. 3F, a circular modified ground 200 can be formed around the file 100. The ground reinforcement device 300 for implementing such a stopping operation will be described later.

Further, if the entirety of the periphery of the file 100 is improved without any undeveloped ground, the adherence between the ground and the file 100 becomes excellent, thereby improving the radius d2 smaller than the conventional one for the same vertical load and horizontal load So that the ground 200 can be formed. 3F, the radius d2 of the modified ground 200 is smaller than the radius d1 of the conventional improved ground when the radius of the modified ground 200 is measured around the file 100. In other words, . Here, the side surface shape of the modified ground (200) is a shape with a lower limit of light, and a narrow lower portion is formed by decreasing at a wide upper portion. This is to ensure that the load is concentrated evenly on the area with small load or that the load does not change drastically depending on the depth, and the load is evenly distributed.

3, the rotating body 310 of the ground reinforcement apparatus 300 moves only up to the mortar 121. However, referring to FIG. 4, when the hardened mortar 121 is moved to the lower side of the mortar 121, So that the rotating body 310 moves to the bottom of the groove 110 to improve the ground. This is possible by enlarging the inner diameter of the rotating body 310.

In the case of the file 100 to be inserted into the groove 100, as shown in FIGS. 5A to 5C, in addition to a general steel pipe or a concrete file as shown in FIG. 3B, the rotational penetration pile, the upper diameter file, Can be used.

Next, the solidifying agent is injected while continuing the stopping operation (S13). After a stop operation is first performed to perform a stop operation, solidifying agent and water are injected into each of the depths of the modified ground 200 as shown in FIG. 3D, and as the blade 320 continues to rotate, soil, Mix well. Here, the solidifying agent may be injected together with the start of the stopping operation, or all of the ground to be improved may be stopped, and then the solidifying agent may be injected and stirred.

Finally, the soil in which the solidifying agent is injected is solidified (S14). When the soil is mixed with the solidifying agent and water, the blade 320 is removed, and then the solidifying agent is allowed to stand for a predetermined time to solidify the solidifying agent, thereby completing the modified soil 200 as shown in FIGS. 3E and 3F.

FIG. 6 is a perspective view schematically showing a ground reinforcement apparatus for implementing the ground reinforcement method according to the present invention, FIG. 7 is a side sectional view showing a coupling structure between the ground reinforcement apparatus and the file shown in FIG. 6, FIG. 9 is a perspective view showing the blade shown in FIG. 6, and FIGS. 9B and 9C are cross-sectional views in which the blade and the injection tube shown in FIG. Fig. 10 is a side view showing a modified coupling structure of a rotor and a blade in the ground reinforcement apparatus shown in Fig. 6, Fig. 11 is a side view showing a modified example of the rotor shown in Fig. 6 And Figs. 12A to 12C are explanatory diagrams of the state of use of the ground reinforcement apparatus of Fig.

6, the ground reinforcement apparatus 300 for realizing the ground reinforcement method according to the present invention includes a rotating body 310, a blade 320, and an injection tube 330 as shown in FIG.

The rotating body 310 is a member which is fitted on the upper portion of the file 100 and moves up and down along the file 100 and which rotates at a high speed by a power source (hereinafter referred to as a motor 340) And the upper surface is closed or open, and the hollow cylindrical shape is open. The rotating body 310 is partially inserted into the upper portion of the file 100 inserted into the groove 110 and then inserted deeply while rotating.

Of course, the rotating body 310 rotates around the file 100, and is inserted or pulled out while being inserted in the file 100, and is rotated between the inner surface of the rotating body 310 and the outer surface of the file 100 Interference may occur, and the rotation center of the rotating body 310 is prevented from deviating due to the interference or the like. A bearing (not shown) is provided between the rotating body 310 and the file 100 in order to prevent the occurrence of shocks or the like, which may occur during interference between the inner surface of the rotating body 310 and the outer surface of the file 100, The bearings are spaced apart from each other on the inner surface of the rotating body 310 so as to be spaced apart from or in contact with the outer surface of the pile 100.

The rotating body 310 rotated by the motor 340 is fastened to the motor 340 via the fastening member 350 as shown in FIG. Specifically, the flange 311 protruding outward from the upper outer surface of the rotating body 310 and the fastening member 350 made to hold the flange 311 are fastened to each other, and the fastening member 350 The rotation shaft 341 of the motor 340 is engaged.

Accordingly, the motor 340 rotates the fastening member 350, thereby rotating the rotating body 310 coupled with the fastening member. Of course, it is natural that the motor 340 may be installed to directly rotate the rotating body 310 in a state where the fastening member 350 is excluded.

8A, the rotating body 310 is formed with a receiving space 330 capable of receiving a solidifying agent along the outer wall thereof, and the inside of the fastening member 350 coupled to the upper portion of the rotating body 310 A passage 351 through which the solidifying agent flows can be formed in the accommodation space 310a and the injection tube 330 is connected to the passage 351 via the connecting member 352. [ The inlet of the passageway 351 connected to the injection tube 330 is formed in a line on the entire outer wall along the outer wall of the fastening member 350 and the outlet of the passageway 351 connected to the receiving space 310a (Not shown). The solidifying agent injected from the injection tube 330 is temporarily stored in the receiving space 310a of the rotating body 310 through the passage 351 of the fastening member 350 and then discharged to the outside to be stirred with the soil.

8B, the rotating shaft 341 is directly coupled to the rotating body 310 and is moved along the inner flow path of the rotating shaft 341. In this case, And the flowing solidifying agent is discharged from the vicinity of the blade 320 through the injection tube 330 which is embedded in the side portion through the upper portion of the rotating body 310. At this time, as shown in FIG. 8C, the injection tube 330 may be exposed to the outside of the rotating body 310 and fixed.

8C, the coupling structure of the rotating body 310 and the file 100 includes a coupling groove 310b formed in a substantially crooked shape on the side surface of the rotating body 310, The projection 101 is fitted and engaged. Here, the coupling groove 310b may be in the form of a straight line or a "T" letter. In addition, various shapes are possible in which the coupling groove 310b and the coupling projection 101 can be engaged and disengaged.

The blade 320 is a member that cuts the ground while rotating along the rotating body 310 and generates a gap in the ground. The blade 320 is formed to protrude from the outer surface of the rotating body 310 as shown in FIG. 9A, the blade 320 has a substantially rectangular shape in plan view, and a plurality of protrusions 321 are formed on a front surface in a rotating direction. A plurality of such blades 320 are mounted in the circumferential direction of the rotating body 310, and the adjacent blades 320 form a zigzag shape. The blade 320 is preferably a hexahedron having a substantially rectangular cross section, and may also be formed as a sharp pointed surface in a rotating direction so that the soil can be cut while rotating. Here, the protrusion 321 is a member formed to more easily dig the ground.

Also, as shown in FIG. 9B, the blade 320 is disposed such that the rear portion thereof is inclined downward at a certain angle? This is to allow the smooth operation to be performed when the blade 320 rotates while cutting the soil together with the protrusions 321, and to lift up the cut soil. At this time, the inclination angle [theta] is approximately 10 to 15 [deg.], And the inclination angle [theta] is the angle at which the blade 320 is not broken from the soil resistant against rotation per minute of the rotation body 310, When the soil is floated, it is an appropriate angle to prevent the breakage of the blade 320 and the protrusion 321 from the downward pressure. Of course, the inclination angle &thetas; may vary depending on the hardness and strength of the blade 320 and the like.

On the other hand, the injection tube 330 is a member for injecting cement solidifying agent and water between the pores when the blade 320 cuts the soil to generate pores, and supplies the solidifying agent from a storage tank (not shown) And connected to the inner surface or the outer surface of the rotating body 310 through the ground, and is then installed to discharge the solidifying agent into the ground.

At least one injection tube 330 may be disposed, and the solidifying agent may be discharged in an open cross section of the injection tube 330. A plurality of sub injection pipes 330 are installed in one main injection pipe 330 and a solidifying agent flows from the main injection pipe 330 to the auxiliary injection pipe 330, And may be discharged.

As shown in Figs. 9B and 9C, the injection pipe 330 is attached to the outer surface in the longitudinal direction of the rotating body 310, for example, and is connected to several blades 320 of the blades 320, 331 are branched. Of course, the solidifying agent may be discharged directly through the at least one discharge port in the injection pipe 330 while the branch pipe 331 is excluded. Herein, the injection pipe 330 is attached to the inner surface of the hollow rotating body 310, and the branch pipe 331 penetrates the outer wall 313 (see FIG. 11) of the rotating body 310 at a plurality of locations, .

It is also preferable that the branch pipe 331 is mounted to the rear portion of the blade 320 disposed at a predetermined inclination angle? And has an outer diameter within the thickness t formed between the front and rear portions of the blade 320. The limitation of the position and the outer diameter of the branch pipe 331 is to prevent the branch pipe 331 from being damaged by the blade 320 while the soil is being cut.

The branch pipe 331 extends in the longitudinal direction of the blade 320 along the lower surface of the blade 320 and a plurality of discharge ports 332 are formed in the branch pipe 331. In this case, it is possible to mount a separate nozzle instead of the discharge port 332 to increase the soil power of the solidifying agent evenly so as to spread it over the stopped ground.

Meanwhile, the rotating body 310 and the blade 320 may be integrally formed. However, as shown in FIG. 10, it is preferable that the rotating body 310 and the blade 320 are separately manufactured and fastened to each other. To this end, a coupling protrusion 312 protruding short is formed on the outer circumferential surface of the rotating body 310, and the blade 320 is firmly fastened to the coupling protrusion 312 by a conventional method including a screw coupling or the like. It is also possible to change the length of the blade 320 according to the radius d2 of the modified ground 200 requiring work. The length of the lowest blade 320 is the shortest, and the length of the uppermost blade 320 is the longest, so that the surface roughness of the modified ground 200 becomes smooth. This is to ensure that the load is concentrated on a small area or that the size of the load does not change drastically depending on the depth, and the load is evenly distributed.

11 shows another embodiment of the rotating body 310. Inside the rotating body 310, an inner wall 314 having a predetermined distance L1 from the outer wall 313 in the longitudinal direction is further formed. This inner wall 314 is formed to have an outer diameter similar to the inner diameter of the pile 100, wherein the spacing L1 should be at least wider than the thickness of the pile 100. [

6, the inner surface of the outer wall 313 of the rotating body 310 and the outer surface of the pile 100 interfere with each other, so that the rotation center of the rotating body 310 is not separated However, in the embodiment of FIG. 11, a modification is shown in which the rotation center of the rotating body 310 is not separated from the outer surface of the inner wall 314 and the inner surface of the file 100 by the interference. That is, the portion that becomes the center axis of the rotating body 310 together with the file 100 becomes the outer wall 313 in Fig. 6, and becomes the inner wall 314 in Fig. The rotating body 310 having the inner wall 314 can be used by sandwiching the pile 100 between the inner wall 314 and the outer wall 313 of the rotating body 310 as shown in FIG. The blade 320 is formed through the outer wall 313 of the rotating body 310 as shown in FIG. 12C, and the blade 320 The inner and outer blades 322 and 323 may be integrally formed or separately manufactured and may be mounted by the coupling protrusions 312. The inner blades 322 and the outer blades 323 may be integrally formed with each other.

In this case, when the outer wall 313 of the rotating body 310 is formed to penetrate the blade 320, the length of the blade 320 must be long to stop the ground of a large diameter, but the resistance of the soil to be cut is also increased The blade 320 may be broken, and it is designed to prevent the blade 320 from being damaged. Of course, the injection pipe 330 is arranged to inject the mortar to both sides of the outer wall 313 of the rotating body 310. [

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: File
101: engaging projection
110: Home
120: mortar
200: Improved ground
300: Ground reinforcement
310: rotating body
310a: accommodation space
310b: coupling groove
311: Flange
312: engaging projection
313: outer wall
314: inner wall
320: blade
321: projection
330: Injection tube
331: Branch organization
332:
340: motor
341:
350: fastening member
351: passage
352: Connection member.

Claims

An apparatus for reinforcing a surrounding ground provided with a file (100)
A hollow rotating body 310 installed to rotate by being inserted into the pile 100; And
And a blade (320) protruding from the rotating body (310) by a predetermined length to stop the ground.

The method according to claim 1,
The rotating body 310 is fitted to enclose the file 100 and is installed to move along the file 100. The file 100 serves as a rotation center of the rotating body 310 .

The method according to claim 1,
In a state where the file 100 is inserted into the groove 110 formed in the ground and the mortar 121 is injected between the file 100 and the groove 110,
The inner diameter of the rotating body 310 is smaller than the outer diameter of the mortar 121 and the number of the blades 320 Is mounted,
The inner diameter of the rotating body 310 is larger than the outer diameter of the mortar 121 and the plurality of blades 320 are mounted on the upper portion of the rotating body 310 And a blade (320) having a size smaller than that of the upper blade (320) is mounted on the lower portion.

The method according to claim 1,
Further comprising a coupling member (350) for holding the outwardly bent flange (311) on the rotating body (310) and transmitting the force of the power source to rotate the rotating body (310) .

5. The method of claim 4,
A receiving space 310a capable of receiving a solidifying agent is formed along the outer wall of the rotating body 310 and a passage 351 is formed in the coupling member 350 to communicate with the receiving space 310a An injection tube 330 is connected to inject the solidifying agent into the passage 351,
An inlet of the passage 351 connected to the injection pipe 330 is formed on the entire outer wall of the coupling member 350 and an outlet connected to the accommodation space 310a is formed of a plurality of slots .

The method according to claim 1,
A rotating shaft 341 connected to a power source is directly coupled to the rotating body 310,
An inner flow path of the rotating shaft 341 and an injection pipe 330 installed inside the rotating body 310 so as to discharge the solidifying agent to the outside so as to allow the solidifying agent to flow, .

The method according to claim 1,
The rotatable body 310 and the file 100 are formed such that the engaging protrusion 101 protruding from the outer surface of the pile 100 can be engaged with and disengaged from the engaging recess 310b formed in the side surface of the rotating body 310 And the ground reinforcement is fastened.

The method according to claim 1,
Wherein the blade (320) is disposed such that the rear portion thereof is inclined downward at a certain angle (?) From the front.

The method according to claim 1,
Wherein the rotation body (310) is formed with a coupling protrusion (312) for detachment of the blade (320) to replace the blade (320).

The method according to claim 1,
Wherein an inner wall (314) formed by a predetermined length (L1) is formed on the inner side of the hollow of the rotating body (310) from the outer wall (313).

11. The method of claim 10,
The pile 100 is sandwiched between the inner wall 314 and the outer wall 313 and the inner wall 314 is inserted into the hollow pile 100, (310). &Lt; / RTI >

The method according to claim 1,
Further comprising an injection pipe (330) mounted on the rotating body (310) and arranged to inject a solidifying agent into the stopped ground.

11. The method of claim 10,
Wherein the injection pipe (330) is mounted along the inner surface or the outer surface of the rotating body (310) to discharge the solidifying agent toward the blade (320) side.

14. The method of claim 13,
Wherein the injection pipe (330) is branched to a lower surface of the blade (320) and includes a branch pipe (331) having a discharge port (332).

14. The method of claim 13,
The branch pipe 331 extends in the longitudinal direction of the blade 320 and has an outer diameter equal to or smaller than the thickness t formed between the front portion and the rear portion due to the inclined angle? And the ground reinforcement device.

16. A method for reinforcing a ground using an apparatus according to any one of claims 1 to 15,
Drilling a groove 110 in the ground (S10);
A step (S11) of inserting the file (100) into the groove (110) and injecting the mortar (121);
(S12) stopping the ground of the predetermined radius (d2) by centering the file (100);
Injecting a solidifying agent into the stopped ground (S13); And
And a step (S14) of solidifying the solidifying agent.

17. The method of claim 16,
Wherein said step S12 is a step of forming a narrow lower portion by decreasing at a wide upper portion in said stopping step S12.

17. The method of claim 16,
The mortar 121 is injected between the groove 110 and the pile 100 in a step S11 of injecting the mortar 121 and the depth of the ground to be stopped at the bottom of the groove 110 , Or injected from the bottom of the groove (110) to the ground.