KR101667647B1

KR101667647B1 - Double auger device for improving ground, and improvement method of ground and construction method for enhancing horizontal bearing capacity of pile using the same

Info

Publication number: KR101667647B1
Application number: KR1020160048231A
Authority: KR
Inventors: 유지훈; 오경선; 정종선; 김찬묵
Original assignee: 주식회사 정호; 수경기업 주식회사; 주식회사 성원중기계
Priority date: 2016-04-20
Filing date: 2016-04-20
Publication date: 2016-10-20

Abstract

The present invention relates to a ground improvement device for improving soft ground by mixing a hardening material with a soft ground, comprising: an outer auger; An outer rod connected to the outer auger and having a hollow at its center; An outer auger coupled to a lower outer surface of the outer rod, the outer auger including a screw type vane and a plurality of bits coupled to an end of the screw type vane; A plurality of outer stirring vanes coupled to an outer surface of the outer rod; At least one outer hardening material inlet disposed in the outer rod for injecting a hardening material; An inner auger provided inside the outer auger; An inner rod connected to the inner auger and inserted into the hollow of the outer rod to move up and down; An inner auger coupled to a lower portion of the inner rod, the inner auger including a screw type vane and a plurality of bits coupled to an end of the screw type vane; A plurality of inner stirring vanes coupled to an outer surface of the inner rod; And at least one inner hardening material inlet pipe provided in the inner rod for injecting a hardening material, wherein the depth of the improvement of the soft ground by the outer rod and the inner rod is varied to improve the soft ground efficiently and economically And a swivel (SWIVEL) provided between the outer auger and the outer rod to smoothly inject the hardening material into the outer rod rotating through the swivel. And a method of constructing a pile for increasing horizontal support force.
By using the present invention, it is possible to vary the depth of the improvement of the soft ground by the outer and inner rods by using the double auger ground improvement apparatus including the outer auger and the inner auger, It is possible to sufficiently improve all of the modified portions by the inner rod and to widen the upper portion and to provide the effect of increasing the horizontal and vertical supporting force of the soft ground efficiently and economically.

Description

[0001] The present invention relates to a double auger ground improvement apparatus, a ground improvement method using the same, and a double auger device for improving ground,

This embodiment improves both the outer side and the inner side by using the double auger ground improvement device, the ground improvement method using the same, and the pile construction method of increasing the horizontal supporting force, that is, the double auger with the outer auger and inner auger, A double auger ground improvement apparatus, a ground improvement method using the same, and a pile construction method for increasing a horizontal support force.

If the ground is a soft ground when constructing structures such as buildings, bridges, etc., it may be necessary to improve the soft ground to secure the support for supporting the structure, to install the pile on the soft ground, or to improve the soft ground, Respectively.

However, in the above-mentioned prior arts, the upper and lower portions are formed to have the same diameter, and the upper portion where the large vertical load and the large bending moment act is weak. Therefore, in order to solve this problem, when the number of ground improvement devices is increased or the perforation hole is enlarged to increase the cross-sectional area of the ground improvement device, the number of ground improvement is increased and the amount of cement injected is increased, There is a problem that the cost of construction increases.

Korean Patent No. 10-1299210 discloses "a ground tool for pile upgrading" and Korean Patent Laid-Open No. 10-2014-0050524, A method for constructing an improved body and a pile " These prior arts have attempted to improve a bearing capacity by forming a ground remover having a larger diameter at the top and installing a pile at the center of the ground remover.

However, in the above-mentioned conventional techniques, the diameter-enlarging blade may not work properly by mechanically configuring the diameter-setting bits so that the diameter-enlarging blade is folded or unfolded in accordance with the forward and reverse rotation of the cloth tool, A sufficient space for inserting a pile can not be ensured when inserting a pile, which makes it difficult to join a pure fixing material (hardened material) to a pile. there was.

Patent 1: Korean Patent No. 10-1299210 Patent 2: Korean Patent Publication No. 10-2014-0050524

In order to solve the above-mentioned problems, the present invention uses a double auger ground improvement device including an outer auger and an inner auger so that the depth of improvement of the soft ground by the outer and inner rods is different A double auger ground improvement device which can improve both the outer and inner improved parts by a sufficient amount and can improve the upper part in a wider range and thereby increase the horizontal and vertical support force of the soft ground effectively and economically, And a method of constructing a pile for enhancing the horizontal support force.

Also, a double auger ground improvement device capable of easily inserting a pile and easily injecting a hardened material to be coupled to a pile by securing a pile inserting space by coupling a lower outer rod to a lower end of the outer rod, And to provide a pile construction method for increasing the horizontal support force.

A connection hose having a swivel (SWIVEL) composed of an outer ring formed with a through hole and an inner ring formed with a through hole is provided between the outer auger and the outer rod, and the connection hole connects the through hole and the outer hardening material inlet, A double auger ground improvement device for injecting a hardened material through an outer hardening material inlet pipe through a through hole and a connecting hose so as to smoothly and easily inject the hardened material into an outer hardening material inlet pipe provided in an outer rod rotating through a swivel, And to provide a pile construction method for increasing the horizontal support force.

In addition, by forming a circular groove in a circumferential direction on the inner side or the outer side of the outer ring at the position where the through-hole of the outer ring is formed, the hardened material flowing into the through hole of the outer ring flows into the circular groove, The present invention provides a double auger ground improvement apparatus which is flowed by a connecting hose so that a hardening material is injected smoothly, a ground improvement method using the same, and a method of constructing a pile of a horizontal supporting force.

Further, the T-shaped incised portion is formed on the lower side of the swivel, the protruding portion is provided on the upper side of the outer rod, and the protruding portion of the outer rod is inserted into the T-shaped incised portion of the swivel, We propose a double auger ground improvement apparatus which does not easily separate swivel and outer rods during construction, and ground improvement method and horizontal load increasing method.

Further, the ground improvement by the inner rod within the depth where the outer rod is inserted is reduced to less than 1/2 of the amount of the hardening material, thereby reducing the amount of the hardening material used. Soil Improvement Method and Horizontal Bearing Capacity Improvement Pile Construction Method.

The apparatus for improving a double auger according to an embodiment of the present invention is a device for improving a soft ground by mixing a hardening material with a soft ground, comprising: an outer auger; An outer rod connected to the outer auger and having a hollow at its center; An outer auger coupled to a lower outer surface of the outer rod, the outer auger including a screw type vane and a plurality of bits coupled to an end of the screw type vane; A plurality of outer stirring vanes coupled to an outer surface of the outer rod; At least one outer hardening material inlet disposed in the outer rod for injecting a hardening material; An inner auger provided inside the outer auger; An inner rod connected to the inner auger and inserted into the hollow of the outer rod to move up and down; An inner auger coupled to a lower portion of the inner rod, the inner auger including a screw type vane and a plurality of bits coupled to an end of the screw type vane; A plurality of inner stirring vanes coupled to an outer surface of the inner rod; And at least one inner hardening material inlet pipe provided in the inner rod for injecting a hardening material, wherein the soft ground is improved efficiently and economically by varying the depth of improvement of the soft ground by the outer rod and the inner rod , And a swivel (SWIVEL) provided between the outer auger and the outer rod to smoothly inject the hardening material into the outer rod rotating through the swivel.

The outer rod may further include a lower outer rod coupled to a lower end of the outer rod, wherein the diameter of the lower outer rod is the same as the outer rod.

Also, the connection between the swivel and the outer rod may be such that the protrusion provided on the upper side of the outer rod is inserted into the vertical cut-out portion of the T-shaped cut portion formed on the lower side of the swivel, And a horizontal cut-out portion of the cut-out portion.

The swivel may further include an outer ring connected to and fixed to a leader of the double augmented ground improvement device; And an inner ring inserted and rotating inside the outer ring, wherein the injection of the settling material into the outer hardening receiving channel comprises a through hole passing through the outer ring, a through hole communicating with the through hole and passing through the body of the inner ring And one or more through holes communicating with the lower outer side through the connection hose connecting the through holes and the outer hardening inlet.

Also, the connection between the connection hose and the outer hardening receiving pipe may be detachable, and may be detachable together with the outer rod attached to and detached from the swivel.

In addition, a circular groove is formed in a circumferential direction at a position where the through hole is formed on the inner side of the outer ring or the outer ring, so that the set material flowing into the through hole flows into the circular groove, To the connecting hose.

The ground improvement method or the horizontal support force pile construction method using the double auger ground improvement apparatus according to an example of the present invention may include a first step of mounting the double auger ground improvement apparatus on the soft ground; A second step of inserting the outer rod and the inner rod by forward rotation of the outer auger and the inner auger without injecting water or injecting the hardening material or injecting the hardening material without injecting water; Three steps of stirring the soft ground by reciprocating the inner rod vertically or reversely while reciprocating the inner auger without injecting or injecting the hardened material; A fourth step of stirring the soft ground by reciprocating the outer rod vertically or reversely while rotating the outer auger without injecting or injecting the hardened material; And the inner auger is rotated in the reverse direction to draw the lower end portion of the inner rod to the lower end portion of the outer rod, and then the outer rod and the inner rod are reciprocated up and down while rotating the reverse side auger And 5) a step of stirring the soft ground and withdrawing the soft ground.

In addition, the method may further include a sixth step of inserting piles into the improved soft ground after step 5.

Further, in the ground improvement by the inner rod, the amount of the hardening material used in the portion into which the outer rod is inserted is within 1/2 of the amount of the hardening material used in the lower portion.

In addition, the method for constructing a horizontal support force pile using the double auger ground improvement apparatus according to another exemplary embodiment of the present invention includes the steps of: (1) placing the double auger ground improvement apparatus on the soft foundation; Two steps of inserting the lower outer rod and the outer rod and the inner rod while rotating the outer auger and the inner auger in a normal direction without injecting or injecting water; A third step of covering the inner side of the lower outer rod and the outer rod while withdrawing the inner rod while rotating the inner auger forward or reverse; Inserting a pile into the clay space; 5) injecting the hardening material into the perimeter space of the inserted pile; And rotating the outer rod and the lower outer rod vertically while vertically rotating or reversely rotating the outer auger without injecting or injecting the hardened material to stir the soft ground and then draw it out .

By using the present invention, it is possible to vary the depth of the improvement of the soft ground by the outer and inner rods by using the double auger ground improvement apparatus including the outer auger and the inner auger, It is possible to sufficiently improve all of the modified portions by the inner rod and to widen the upper portion and to provide the effect of increasing the horizontal and vertical supporting force of the soft ground efficiently and economically.

Further, the pile can be easily inserted by inserting the lower outer rod into the lower end of the outer rod to secure the pile insertion space, and the hardening material can be easily injected to be well coupled with the pile .

A connection hose having a swivel (SWIVEL) composed of an outer ring formed with a through hole and an inner ring formed with a through hole is provided between the outer auger and the outer rod, and the connection hole connects the through hole and the outer hardening material inlet, The through hole, and the connection hose to inject the set material into the outside hardening material inlet pipe, it is possible to smoothly and easily inject the set material into the outside hardening material inlet pipe provided in the outer rod that rotates the set material through the swivel .

In addition, by forming a circular groove in the circumferential direction inside or outside the outer ring at the position where the through-hole of the outer ring is formed, the settling material introduced into the through-hole of the outer ring flows into the circular groove, So that the injection of the hardened material can provide a smooth effect.

Further, the T-shaped incised portion is formed on the lower side of the swivel, the protruding portion is provided on the upper side of the outer rod, and the protruding portion of the outer rod is inserted into the T-shaped incised portion of the swivel, It is possible to provide an effect that the swivel and the outer rod are not easily separated during construction.

Further, the ground improvement by the inner rod within the depth where the outer rod is inserted is less than 1/2 of the amount of the hardening material than the lower portion, thereby reducing the amount of the hardening material used and providing an economical and environmentally friendly effect.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing a state in which a ground is improved using a double auger ground improvement device according to an example of the present invention;
Fig. 2 is an enlarged view of the double auger ground improvement device of Fig. 1. Fig.
Fig. 3 is an enlarged view showing the outer auger and the outer rod portion of the double auger ground improvement device of Fig. 1. Fig.
4 is a partially cutaway perspective view showing the swivel of FIG. 3 in an enlarged manner.
Fig. 5 is a view showing a state in which a hardening material is injected into an outer rod rotating through the swivel of Fig. 3. Fig.
Fig. 6 is an exploded perspective view showing a state in which a circular groove is formed in the outer ring of the swivel of Fig. 3;
7 is a flowchart showing a soil improvement method using a double auger ground improvement apparatus and a method for constructing a horizontal support force increase pile according to an example of the present invention.
8 is a flowchart showing another example of the present invention, that is, a ground improvement method using a double auger ground improvement device in which a lower outer rod is coupled to a lower end of an outer rod, and a method of constructing a horizontal support force increasing pile.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the construction of a double auger ground improvement apparatus according to an exemplary embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2, the double auger machine augmenting apparatus according to an embodiment of the present invention includes an outer auger 21, an outer rod 23, an outer auger head 25, an outer stirring blade 27, And an outer hardening re-entrainment pipe 29, an inner auger 31, an inner rod 33, an inner auger 35, an inner stirring blade 37 and an inner hardening re-entrainment pipe, A swivel 50 may be provided between the outer auger 21 and the outer rod 23. The hardened material 2 is smoothly injected into the rotating outer rod 23 to vary the depth of the improvement of the soft ground 1 by the outer rod 23 and the inner rod 33, It is possible to increase the horizontal and vertical support force of the support member 1.

The auger is a tool for drilling the ground to form a perforation hole. In the present invention, the outer auger 21 and the inner auger 31 provided inside the outer auger 21 are formed. The outer auger 21 has an outer rod 23 and an outer auger head 25 at its lower portion and an inner auger 31 at its lower portion with an inner rod 33 and an inner auger 35 connected to each other, Is punched or stirred.

An outer rod (23) is connected to the lower side of the outer auger (21). That is, the outer rod 23 is connected to the lower side of the outer auger 21 and rotates by the outer auger 21. The outer auger 21 has an outer auger 25 on its lower side, (27) and the like. A hollow is formed at the center of the outer rod 23 so that the inner rod 33 can be inserted and reciprocated up and down.

The outer auger head 25 is connected to the lower outer surface of the outer rod 23 to crush, excavate, or stir the outer ground of the outer rod 23. The outer auger head 25 includes a screw-shaped blade 251 and a plurality of bits 253 coupled to an end of the screw-shaped blade 251. At this time, the bit 253 may be coupled to the screw-type vane 251 by welding, bolt, or the like, or the end of the screw-type vane 251 may be protruded to form the screw- May be integrally formed.

A plurality of outer stirring wings 27 are coupled to the outer side surface of the outer rod 23 and the gravels to be crushed by the outer auger 25 are agitated with the hardening material 2 or the like. The outer stirring wing 27 may be formed in a single screw shape on the entire outer circumferential surface of the outer rod 23 or may be formed in a part of the outer circumferential surface of the outer rod 23, Or may be formed by combining rod or plate shapes radially on the outer circumferential surface of the outer rod 23, or they may be mixed with each other. In addition, the hardening material 2 and the crushed soil may be agitated May be formed in various shapes to enhance the effect.

When the outer stirring wing 27 is in the form of a screw, a hole may be formed in the outer stirring wing 27 or a cut-out portion may be formed. In the case of forming the hole or the cut-out portion in the outer stirring blade 27, the pressure in the perforation hole can be reduced, the up-and-down reciprocation of the outer rod 23 is facilitated and the area obstructed by the up- And the outer rod 23 is reciprocally rotated up and down so that the stirring object is passed through the hole and the cut-out portion, so that the stirring effect is increased. The hole or cut-out portion may be formed in various shapes so that the agitated material mixed with the ground soil or the like and the set material 2 can pass through.

The outer hardening re-entrainment pipe (29) is a pipe for injecting the hardening material (2) by having at least one of the outer rods (23). The outer curing re-entrainment pipe 29 may be provided on the outer rod 23 itself or on the inner side or outer side of the outer rod 23 or on both sides of the outer rod 23 . And an outer hardening material injection port connected to the outer hardening material receiving pipe 29 for injecting the injected hardened material 2 into the perforation hole. The outer hardening material injection port may be provided on the outer surface of the outer rod 23 Or at the lower part of the outer rod 23, or at the outer auger head 25. The hardened material 2 injected into the outer hardened material injection port is mixed with crushed gypsum or the like to form an agitated material. At this time, the hardened material 2 may be used as a cement mortar, an environmentally friendly solid fire or the like.

3, the outer auger 21 and the outer rods 21 are connected to each other through the outer hardening pipe 29. The hardened material 2 flows into the outer auger 21, 23 of the swivel (50). The swivel 50 includes an outer ring 51 connected to and fixed to the reader 11 of the double augmented ground improvement device 10 and an inner ring 53 inserted and rotated inside the outer ring 51 And the like.

At this time, the swivel 50 and the outer rod 23 should be easily coupled and prevented from being separated from each other. To this end, a T-shaped cutout 533 is formed below the swivel 50, And the protrusion 231 is provided on the upper side of the outer rod 23 so as to connect the swivel 50 and the outer rod 23 to each other. That is, the protruding portion 231 of the outer rod 23 is inserted into the vertical cutout portion of the T-shaped cutout portion 533 of the swivel 50 and then rotated to be positioned in the horizontal cutout portion of the T-cutout portion 533, 50 and the outer rod 23 can be connected. Therefore, the hardened material 2 can be smoothly injected into the outer rod 23 rotating through the swivel 50 and the swivel 50 and the outer rod 23 can be easily connected and disassembled. 50 and the outer rod 23 are not easily separated from each other.

4, the swivel 50 is formed with a through-hole 511 passing through the outer ring 51, the inner ring 53 is connected to the through-hole 511 of the outer ring 51, Shaped one or more through-holes 531 communicating with the lower outer side after passing through the body of the ring 53, that is, flowing out. In this case, the hardened material 2 flows into the through hole 511 of the outer ring 51 fixed to the reader 11, and then flows out to one or more through holes 531 of the inner ring 53. The connecting hole 531 of the inner ring 53 may be provided with a connecting hose 60 for connecting the outlet of the through hole 531 to the outside hardening receiving pipe 29. The hardened material 2 can be smoothly and easily injected into the outer hardened material receiving pipe 29 through the through hole 511, the through hole 531 and the connecting hose 60 (see FIG. 5). The connecting hose 60 and the outer hardening material receiving pipe 29 can be easily detached and attached together with the outer rod 23 which is detachable from the swivel 50 by detachably connecting the connecting hose 60 and the outer hardening receiving pipe 29.

6, a circular groove 55 may be formed in the outer side of the outer ring 51 at the position where the through hole 511 of the outer ring 51 is formed or in the circumferential direction outside the inner ring 53 have. In this case, the set material 2 introduced into the through hole 511 of the outer ring 51 flows into the circular groove 55 and then flows out through the at least one through hole 531 to the connecting hose 60, 2 can be performed more smoothly.

The lower outer rod 235 having the same diameter as the outer rod 23 can be further coupled to the lower end of the outer rod 23, that is, below the outer auger 25. This lower outer rod 235 is able to prevent the collapse of the excavated surface when the pile 3 is inserted into the soil of the inner side thereof. Therefore, the pile 3 can be easily inserted, the hardening material 2 can be easily injected by securing the hardening material injection space, and the hardening material 2 can be easily joined to the pile 3 without being mixed with the ground I will.

An inner rod 33 is connected to the lower side of the inner auger 31. The inner rod 33 is inserted into the hollow of the outer rod 23 and moves up and down. The inner auger 35 is coupled to a lower portion of the inner rod 33. The inner auger 35 includes a screw type vane 351 and a plurality of bits 353 coupled to ends of the screw vane 351, Excavates, stirs, or clumps the inside of the water tank 23. A plurality of inner stirring blades 37 are coupled to the outer side surface of the inner rod 33 so that the soil is crushed, excavated, stirred, or cloaked by the inner auger 35 with the hardening material 2 or the like . The inner rod 33 is provided with at least one inner curing re-entrainment pipe to inject the settable material 2. Details of the inner auger 31, the inner rod 33, the inner auger 35 and the inner agitator 37 are described in detail in the above-described outer auger 21, outer rod 23, outer auger 25, the outer stirring wing 27, and the outer hardening receiving pipe 29. [ Further, the inner hardening re-entrainment pipe descends to the center of the inner rod 33 and is connected to the side of the inner auger head 35 and the inner rod 33. Further, in the case of claying the gravel, it is preferable to form the inner stirring blade 37 into a screw shape.

The modified depth of the soft ground 1 by the outer rods 23 and the inner rods 33 can be made different by using the double auger ground improvement device 10 as described above and thus the soft ground 1 ) Can be improved, and the supporting force of the soft ground 1 can be increased. In other words, the upper portion of the soft ground 1 to be improved by the outer rod 23 can be further widened, and the upper portion of the soft ground 1, which needs further reinforcement, Can be improved without affecting the ground to be improved by the damper (33). Therefore, it is possible to secure a larger vertical supporting force and a horizontal supporting force than the conventional upper and lower soft grounds 1 are improved to the same area. In particular, the upper portion in which the bending moment is largely generated by the horizontal force, It is possible to reduce the settling, suppress the uneven settlement, and reduce the settable material 2 used for improving the lower soft ground 1, which is relatively stronger than the upper portion. This is economical and environmentally friendly. In addition, the soft ground 1 improved by the present invention can be used as a base of a medium- and low-rise building with low load.

Hereinafter, a ground improvement method using a double auger ground improvement apparatus and a method of constructing a horizontal support force elevating pile according to an exemplary embodiment of the present invention will be described in detail with reference to the drawings. On the other hand, the construction of the double auger ground improvement apparatus is described above.

Referring to FIG. 7, the soil improvement method and the horizontal load increasing pile construction method using the double auger ground improvement apparatus according to an embodiment of the present invention are characterized by including a first stage for mounting the double auger ground improvement apparatus 10, And three steps of reciprocating the inner rod 33 up and down so as to stir the soft ground 1 and a step of reciprocating the outer rod 23 up and down to insert the soft ground 1 5 steps of stirring the soft ground 1 after the outer rod 23 and the inner rod 33 are reciprocated upward and downward and then pulling out the soft ground 1 and 6 steps of inserting the pile 3 .

In the first step of mounting the double auger soil improvement apparatus 10, the double auger soil improvement apparatus 10 is placed on the soft foundation 1 to be improved. At this time, the double augment machine augmenting apparatus 10 is configured such that the outer rod 23 and the lower end of the inner rod 33 are positioned at the same position and the lower end of the inner rod 33 is positioned further than the lower end of the outer rod 23 It may be mounted to protrude.

The second step of inserting the outer rod 23 and the inner rod 33 is to insert the hardened material 2 or the hardened material 2 without injecting water or injecting water, 21 and the inner auger 31 to insert the outer rod 23 and the inner rod 33 in the forward rotation. That is, according to the condition of the ground to be improved, the outer auger 21 and the inner auger 31 are lowered by normal rotation without injecting or injecting water into the ground, and inserted to a required depth. At this time, the inner rod 33 is inserted deeper than the outer rod 23, and the outer rod 23 and the inner rod 33 are normally inserted without injecting the hardening material 2, The hardening material 2 may be inserted while being injected.

The third step of oscillating the soft ground 1 by reciprocating the inner rod 33 up and down is to rotate the inner auger 31 forward or reverse while rotating the inner auger 31 without injecting or injecting the hardened material 2. [ So that the soft ground 1 is stirred. In this step, the inner auger 31 inserted up to a depth to be improved in the above-described step is vertically reciprocated without injecting or injecting the settable material 2 in the perforation hole. At this time, the inner auger 31 is rotated in the reverse direction or in the forward direction while ascending, and is forwardly rotated or reverse rotated while descending. Generally, the auger is a direction in which the forward rotation is descending, and it can be raised while rotating the inner auger 31 in order to more effectively stir the ground in the direction in which the reverse rotation rises, and can descend while reversely rotating.

The fourth step of oscillating the soft ground 1 by reciprocating the outer rod 23 up and down can be performed by rotating the outer auger 21 in the forward or reverse direction while injecting or injecting the hardened material 2, So that the soft ground 1 is stirred. At this time, the outer auger 21 is also elevated while rotating in the reverse direction, while the lower auger 21 is rotated in the forward and reverse directions. However, in order to more effectively stir the ground, the outer auger 21 is rotated forward It can descend while rotating. This step may be performed before or simultaneously with the three steps of stirring the soft ground 1 by reciprocating the inner rod 33 described above.

The fifth step of reciprocating the outer and inner rods 23 and 33 in the upward and downward directions to stir the soft ground 1 and then pulling it out is to reverse the inner auger 31 so that the lower end of the inner rod 33 is connected to the outer rod 23 and the inner and outer augers 21 and 31 are rotated forward and reverse while rotating the outer and inner rods 23 and 33 vertically to reciprocate the soft ground 1 And withdrawing it. That is, the soft ground 1 is further agitated at the upper portion of the soft ground 1 improved in the above-described steps, that is, the depth at which the outer rod 23 is inserted. At this time, the ground can be stirred while the outer rod 23 and the inner rod 33 are reciprocated up and down, and the ground can be stirred while the outer rod 23 and the inner rod 33 are reciprocated vertically. The amount of the hardening material 2 to be used for the ground improvement portion by the inner rod 33 other than the inner rod 33 during the improvement of the ground by the inner rod 33 within the depth where the outer rod 23 is inserted is less than 1/2 Of the hardening material 2 may be used. This is because the portion where the outer rod 23 is inserted is improved in the soft ground 1 on the outer side so that the amount of the hardened material 2 to be used can be reduced to provide an economical and environmentally friendly effect.

The step 6 of inserting the pile 3 is a step of inserting the pile 3 into the improved soft ground 1 and inserting the pile 3 at the center of the improved soft ground 1 to increase the load . In this case, the pile (3) mainly occupies a large vertical supporting force, and the expanded expanding body on the upper side increases the horizontal supporting force, thereby securing the horizontal supporting force without increasing the number of the piles (3) or increasing the sectional area. This step can be omitted.

8, the soil improvement method using the double auger ground improvement apparatus and the horizontal load increasing pile construction method are the same as those of the double auger ground improvement apparatus (refer to FIG. 8) in which the lower outer load 235 is further coupled to the lower end of the outer load 23 10), two stages of loading the lower auger rod 235, the outer rod 23 and the inner rod 33, and a step of loading the lower outer rod 231, The step 3 of inserting the pile 3 and the step 5 of inserting the hardening material 2 and the step 3 of inserting the hardening material 2 are carried out, And 6 steps of stirring the ground 1 and taking it out.

The first step of mounting the double auger ground refinement device 10 is to place the double auger ground refinement device 10 on the soft foundation 1 to be improved. At this time, the double augment machine modifying apparatus 10 is mounted in a state where the lower end of the lower outer rod 235 and the lower end of the inner rod 33 coincide with each other.

The second step of inserting the lower outer rod 235 and the outer rod 23 and the inner rod 33 is to rotate the outer auger 21 and the inner auger 31 in right direction, The rod 235, the outer rod 23, and the inner rod 33 are inserted. That is, the double auger soil conditioner 10 is inserted to the required depth while the outer auger 21 and the inner auger 31 are lowered by normal rotation. At this time, if water is not injected or injected into the perforation hole depending on the state of the ground The lower lower outer rod 235, the outer rod 23, and the inner rod 33 can be inserted.

The third step of disposing the inner bottom of the lower outer rod 235 and the outer rod 23 and withdrawing the inner rod 33 is to rotate the inner auger 31 forward while rotating the lower outer rod 235 and the outer rod 23 And the inner auger 31 is rotated in the reverse direction, and the inner rod 33 is taken out. At this time, since the lower outer rod 235 is coupled to the lower portion of the outer rod 23, it is possible to prevent the ground from being collapsed even if the inner ground is clogged.

The step 4 of inserting the pile 3 is a step of inserting the pile 3 into the cloaked space. That is, the step of inserting the pile 3 into the hollow formed at the center of the outer rod 23 can easily and easily insert the pile 3 along the outer rod 23 and the lower outer rod 235 .

Step 5 of injecting the hardened material 2 is a step of injecting the hardened material 2 into the perimeter space of the inserted pile 3. [ At this time, the space for injecting the hardened material 2 under the outer rod 23 is secured by the lower outer rod 235, so that the hardened material 2 can be easily injected.

The sixth step of withdrawing the soft ground 1 after agitating the soft ground 1 is carried out by rotating the outer auger 21 forward or reverse while rotating the outer and inner rods 23 and 235 without injecting or injecting the hardened material 2. [ Of the soft ground 1 by rotating the outer rods 23 of the above-described embodiment up and down so as to stir the soft ground 1, And the lower outer rod 235, and then pulls out the soft ground 1.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: Soft ground
2: hardened material
3: Stake
10: Double auger ground improvement device
11: Leader
21: Outer auger
23: outer load
231: protrusion
235: Lower outer rod
25: outer auger head
251: Screw type blade
253: bit
27: outer stirring blade
29: External hardening
31: Inner auger
33: Inner rod
35: inner auger head
351: Screw-type wing
353: bit
37: inner stirring blade
50: Swivel
51: outer ring
511: Through-hole
53: Inner ring
531: Through ball
533: T-shaped incision
55: Circular groove
60: Connection hose

Claims

A ground improvement device for improving soft ground by mixing a hardening material with a soft ground,
Outer auger;
An outer rod connected to the outer auger and having a hollow at its center;
An outer auger coupled to a lower outer surface of the outer rod, the outer auger including a screw type vane and a plurality of bits coupled to an end of the screw type vane;
A plurality of outer stirring vanes coupled to an outer surface of the outer rod;
At least one outer hardening material inlet disposed in the outer rod for injecting a hardening material;
An inner auger provided inside the outer auger;
An inner rod connected to the inner auger and inserted into the hollow of the outer rod to move up and down;
An inner auger coupled to a lower portion of the inner rod, the inner auger including a screw type vane and a plurality of bits coupled to an end of the screw type vane;
A plurality of inner stirring vanes coupled to an outer surface of the inner rod; And
And at least one inner hardening material inlet pipe provided at the inner rod for injecting the hardening material,
The soft ground can be efficiently and economically improved by varying the depth of the improvement of the soft ground by the outer rod and the inner rod,
And a swivel (SWIVEL) provided between the outer auger and the outer rod to smoothly inject the hardening material into the outer rod rotating through the swivel,
The swivel,
An outer ring connected to and fixed to a leader of the ground improvement device; And
And an inner ring inserted and rotated inside the outer ring,
Wherein the curing material injection into the outer curing re-entrainment tube comprises a through-hole penetrating the outer ring, at least one through-hole connected to the through-hole and communicating with the lower outer side after passing through the body of the inner ring, Wherein the main hose is connected through a connection hose connecting the reentry pipe.

The method according to claim 1,
And a lower outer rod coupled to a lower end of the outer rod,
Wherein the lower outer rod has the same diameter as the outer rod.

The method according to claim 1 or 2,
The swivel and the outer rod are connected to each other by a protruding portion provided on an upper side of the outer rod in a T-shaped cut portion formed on a lower side of the swivel, inserted into a vertical cut portion of the T-shaped cut portion, And is placed in a horizontal cutting section.

delete

The method according to claim 1 or 2,
Wherein the connection between the connection hose and the outer hardening receiving pipe is detachable and removable together with the outer rod attached to and detached from the swivel.

The method according to claim 1 or 2,
Wherein a circular groove is formed in a circumferential direction at a position where the through hole is formed on the inner side of the outer ring or on the outer side of the inner ring,
Wherein the settling material introduced into the through hole flows into the circular groove and then flows out through the at least one through hole into the connecting hose.

In the ground improvement method using the double auger ground improvement device of claim 1,
A step (a) of mounting the double auger soil improvement apparatus on the soft ground;
A second step of inserting the outer rod and the inner rod by forward rotation of the outer auger and the inner auger without injecting water or injecting the hardening material or injecting the hardening material without injecting water;
The inner side of the inner auger is rotated forward or backward while the inner side auger is not injected or injected, and the inner rod is reciprocated up and down to stir the soft ground;
A fourth step of stirring the soft ground by reciprocating the outer rod vertically or reversely while rotating the outer auger without injecting or injecting the hardened material; And
The inner auger is rotated in the reverse direction to draw the lower end portion of the inner rod to the lower end portion of the outer rod and then the outer rod and the inner rod are reciprocated up and down while rotating the normal direction or the reverse direction, And a fifth step of withdrawing the soil after agitating the soil.

The method of claim 7,
And a sixth step of inserting a pile into the improved soft ground after step 5.

The method of claim 7,
Wherein the amount of the hardening material used in the portion where the outer rod is inserted in the ground improvement by the inner rod is within 1/2 of the amount of the hardening material used in the lower portion. Improved construction method.

In the method of constructing a pile of a horizontal supporting force for a pile according to claim 2,
A first step of mounting the double auger ground improvement device on the soft ground;
Two steps of inserting the lower outer rod and the outer rod and the inner rod while rotating the outer auger and the inner auger in a normal direction without injecting or injecting water;
A third step of covering the inner side of the lower outer rod and the outer rod while withdrawing the inner rod while rotating the inner auger forward or reverse;
Inserting a pile into the clay space;
5) injecting the hardening material into the perimeter space of the inserted pile; And
And rotating the outer auger in a forward or reverse direction without injecting or injecting the hardened material to vertically reciprocate the outer rod and the lower outer rod to stir the soft ground and then pull out the double auger Improvement of Horizontal Bearing Capacity Using Improved Device.