KR20160095587A - Digging device for foundation pile and method for reinforcing soil using thereof - Google Patents

Abstract

The present invention relates to an excavation device for a foundation pile and a method for reinforcing soil using the same. The excavation device for a foundation pile inserts a foundation pile into the ground to reinforce soil, and comprises: a hollow body to accommodate an end portion of one side of the pile through an opened surface thereof; a mounting panel mounted or separated to close the other surface of the body; a mounting member mounted on one side of the pile penetrating the mounting panel to be accommodated in the body; an excavation wing formed on an outer surface of the body in a screw thread shape to excavate the ground while rotating and moving forwards; an excavation unit having a rotary key outwardly protruding from a position on an upper portion of the body which is out of a range in which the excavation wing is formed; a rotary body having a stopping groove which is formed on an inner surface thereof, accommodates the pile, and is mounted on the rotary key to rotate the excavation unit on which the pile is fixed; and a rotational unit having a power source linked and installed to rotate the rotary body. The foundation pile is inserted into the ground to maximally avoid a contact between a side surface of an excavated groove and the pile to prevent a reduction in strength and damage by a crack or torsional stress which can be formed on the pile.

Description

Technical Field [0001] The present invention relates to a digging device for foundation piles and a reinforcing soil using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling apparatus and a ground reinforcement for excavating a foundation by penetrating a foundation pile into the ground and an excavating unit for excavating the foundation, And a method for reinforcing a ground using the same.

Generally, when a building or structure is built, foundation is constructed to reinforce the ground using piles to support the superstructure according to the condition of the ground or the load of the building or structure. For this purpose, soil reinforcement using a pile can be accomplished by using a steel pipe file produced by the factory or a piling method in which an established file such as PHC, PC, RC is hammered into the ground, And a rotary penetration method in which the pile is rotated and penetrated into the ground. At this time, the foundation file of the PHC (Pretensioned spun high strength concrete piles) is usually used for the rotary penetration method.

To briefly describe the rotation penetration method, a foundation file is formed by connecting a plurality of PHC files and passing a thickness portion between the inner diameter and the outer diameter of the foundation file to provide a tensile member, and then pulling the tensile member to provide a prestress . The base file thus produced is turned upright on the ground and is intruded into the ground.

Here, while the base file is rotated and intruded, a considerable torsional stress is generated due to friction with the ground, and the foundation file is destroyed. Therefore, a separate apparatus and method are required for excavating the underground while protecting the foundation file.

In order to satisfy this requirement, the ground is excavated with a separate excavation mechanism and the grooves are drilled, and then the foundation pile is inserted to inject the soil cement.

However, when inserting a file into the groove where the ground is first excavated, the clay generated at the time of excavation is accumulated on the bottom of the groove, and a gap is formed between one surface of the foundation pile inserted in the groove and the bottom surface of the groove, So that it can not fully support the vertical and horizontal loads applied from the ground, and ultimately the foundation pile can be damaged.

JP2008-75336 10 KR2007-0063908 10 KR2010-0021896 10 KR2010-0045958 10

According to the present invention, which is developed to solve the above-mentioned problem, there is provided a digging unit fixed on a lower part of a pile and rotating while digging a ground, The present invention provides an excavation apparatus for a foundation pile, which is capable of fully supporting a load applied from a ground in a state where it is as close as possible between a bottom surface of a groove and a drilling unit, and a ground reinforcement method using the same.

In order to achieve the above object, according to a first aspect of the present invention, there is provided an apparatus for drilling a pile-in-the-ground file to reinforce a ground, the pile- A fastening panel that is coupled or separated to dispose the other surface of the body, a fastening member that is inserted through the fastening panel and is fastened to one side of the pile received in the body, And an excavating unit having an excavating blade formed in a threaded shape on an outer surface thereof and a rotary key projecting outwardly at a position out of the range where the excavating blade is formed on the upper part of the body.

Here, the pile is provided with a shoe having a predetermined thickness mounted on one end surface of the pawl to be fastened to the fastening member, and the pawl is provided with a fastening hole for fastening the fastening member.

In the case where a prestress is provided to the filler between the body and the file while a plurality of files are connected and a tensile hole is further formed so as to partially overlap the fastening hole in the shoe, And one end of the tensile member is fixed to the tensile hole at one end of the pile received in the body.

In addition, the symmetric parts of both sides of the clamping panel, except for the center part on the side of the paper surface side or the central part, are provided with at least one center key protruding outwardly to catch the center of the rotating drilling unit.

The excavating wings are inclined in one integral shape and are fixed along the outer surface of the body in the form of threads having different heights at both ends, or at least two excavating wings are formed so that the excavating wings are inclined so that the height of both ends is different, And adjacent excavating wings are arranged to be inclined in mutually opposite directions, and each excavating wing is arranged in a zigzag shape with mutually different heights on the side, or a pair of two equally spaced apart from each other at the same height And a plurality of pairs are arranged in symmetrical positions.

According to a second aspect of the present invention, there is provided an apparatus for drilling a tread bar, which is a core member, in a ground to reinforce a ground, the drilling apparatus for a foundation file comprising: A fastening member which is fastened to the tread bar and fastened to the fastening panel to fix the tread bar, and a fastening member which is formed in a threaded form on the outer surface of the body for rotating and advancing the ground, And an excavating unit having an excavating blade and a rotary key projecting outwardly from a position outside the range where the excavating blade is formed on the upper part of the body.

Here, the tread bar is provided with a reinforcing member arranged to penetrate the tread bar at a predetermined height so as to closely contact the tread bar and a filler filled in the body, and a stopper mounted on the tread bar to maintain the position of the reinforcing member. And a center riser for holding the center of the tread bar.

The body further includes a front end resistance key protruding from the inner surface toward the center to improve adhesion and adhesion between the filler and the inner surface of the body.

In addition, the symmetric parts of both sides of the clamping panel, except for the center part on the side of the paper surface side or the central part, are provided with at least one center key protruding outwardly to catch the center of the rotating drilling unit.

Each of the excavating blades is inclined so that the height of the both ends is fixed along the outer surface of the body in the form of a thread having a different height or at least two, And the adjacent excavating wings are arranged to be inclined in mutually opposite directions and each excavating wing is arranged in a staggered shape with mutually different heights on the side or a pair of two equally spaced And is composed of a plurality of pairs.

And a rotating unit having a rotating body formed on an inner surface of the rotating shaft and a power source connected to rotate the rotating body, the rotating shaft being coupled to the rotating key while receiving the core material for rotating the excavating unit to which the core is fixed, .

In the ground reinforcement method using the excavating apparatus according to the first and second embodiments of the present invention, the one end side portion of the pile or tread bar is accommodated through one side opened to the excavating unit of the excavating apparatus, 100) a step 100 of coupling the tread bar to the excavation unit; 110) S110 of coupling the rotary unit to the drilling unit; 120) S120) excavating the ground using the excavating unit and the excavating blade mounted on the outer surface of the excavating unit by rotating the core, which is a pile or tread bar, while the rotating unit is rotated by the power source; Step 130 (S130) in which the excavation is completed; A step 131 (S 131) of injecting the filler into the grooves formed in the excavation; And a step 140 (S140) in which the rotary unit is separated from the excavation unit and extracted from the ground.

Here, in step 131 (S131), the excavation unit reciprocates from a bottom surface of the groove formed in the ground to a predetermined height to inject the filler first while stirring the ground, thereby forming an extended reinforcing portion, And the filler is injected secondarily into the groove.

In step 140, the filler is continuously injected while the rotating body is drawn out.

As described above, according to the present invention, the excavation unit is fixed to the lower portion of the pile, and the excavation of the pile is performed by rotating the pile by the crack or torsional stress that can be generated in the pile There is an effect that strength reduction and breakage are prevented.

Further, since the file and the excavation unit remain in the ground, the occurrence of a gap between the bottom surface of the groove and the excavation unit is prevented, the vertical and horizontal loads exerted from the ground in the later buried state are fully supported, The unit is further supported by the excavating wings, so that the supporting force against the vertical and horizontal loads in the ground is improved.

At this time, the underground part of the buried excavation unit part is improved to be wider than the ground part where the pile is buried, and the improved wide part can sufficiently support the vertical and horizontal loads applied in the ground.

In addition, since the file and the excavation unit are moved together to the ground, it is possible to avoid a structure in which a clearance between the bottom surface of the excavated groove and the file occurs, and no clearance is formed between the excavation unit and the bottom surface of the groove, There is an effect that the load applied to the pile and excavation unit is fully supported.

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.
1 is a side view schematically showing a drilling rig for a foundation pile according to a first embodiment of the present invention.
2 is a perspective view showing the first drilling unit shown in Fig.
FIG. 3A is a bottom perspective view of FIG. 2. FIG.
3B is a sectional view taken along the line AA in Fig.
3C is a bottom view of the pipe shown in FIG. 3B.
4A is a perspective view showing a second drilling unit of a drilling rig for foundation files according to a second embodiment of the present invention.
4B is a bottom view of FIG. 4A.
Fig. 5A is a perspective view of the drilling unit shown in Fig. 4A.
5B is a side sectional view showing a state in which a tread bar is installed and excavated in the excavation unit shown in FIG. 5A.
Fig. 6 is a flowchart showing an excavation method using the excavation apparatus shown in Figs. 1 and 4A.
7A to 7C are views showing a ground reinforcement process using the drilling apparatus of FIG.
8A to 8C are views showing a ground reinforcement process using the drilling apparatus of FIG. 4A.

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.

≪ Embodiment 1 >

The drilling apparatus 100 according to the first embodiment of the present invention includes a drilling unit 110 mounted on a lower portion of a pile 200 as shown in Fig. 1, And includes a rotation unit 120. Here, the core material accommodated in the excavating unit 110 includes a file 200 and a tread bar 300. Hereinafter, the case where the core member is the file 200 will be described in the first embodiment of the present invention.

As shown in FIGS. 1 to 3A, the drilling unit 110 includes a body 111 in which one side of the pile 200 is received through a hollow cylindrical, opened side, A fastening member 113 which is fastened to one side of the pile 200 housed in the body 111 through the fastening panel 112 and a fastening member 113 fastened to one side of the body 111 for excavating the ground, And a rotary key 115 protruding from the outer surface of the body 111 for fastening and unlocking the rotary unit 120. The rotation key 115 is formed of a metal plate,

3, a central key 116 protruding outwardly is provided on one side of the fastening panel 112 opposite to the pile 200. The center key 116 rotates to rotate the digging unit 110 It functions to hold the center. The fastening panel 112 may be directly attached to the lower surface of the body 111 by bolting or welding or the like while being fastened to the lower surface of the pile 200 inserted through one open side of the body 111, As shown in Fig. Thus, the fastening panel 112 may rotate with the excavating unit 110, and may be non-rotating with the pile 200. Of course, in order to fully utilize the function of the center key 116, it is preferable that the fastening panel 112 is rotated together with the excavation unit 110, and it is preferable that the fastening panel 112 is directly fastened to the body 111.

3, the excavating vane 114 is formed integrally with the excavating vane 114 as shown in FIG. 3. The excavating vane 114 is inclined so that the outer surfaces of the body 111 are inclined at different heights, . 5A, each of the excavating blades 114 may be inclined so that the height of both ends of the excavating blades 114 may be different from that of the outer surface of the body 111 . At this time, mutually adjacent excavating blades 114 are arranged to be inclined in mutually opposite directions, and these excavating blades 114 are arranged in the same height zone.

3B, a part of the lower part of the pile 200 is received in the body 111 and the upper part of the pile 200 is received by the fastening member 113, (112) and the file (200) are screwed or bolted together. More specifically, a shoe 220 is mounted on the lower end surface of the pile 200 to fasten the pile fastening panel 112 and the pile 200, and the fastening panel 112 is fastened to the shoe 220 And the member 113 is fastened. At this time, the reinforcing band 230 may be mounted on the outer surface to reinforce the lower side portion of the pile 200.

Also, the file 200 may be used only one, or a plurality of the files 200 may be used, depending on the depth of the grooves excavated on the ground.

At this time, when one file 200 is used, the body 111 and the file 200 form the above-described coupling structure. 3B, a prestress is provided using the tension member 210, which connects the tension member 210 to the shoe 200 (not shown) And is embedded in the filler S between the pile 200 and the body 111 in a tensioned state. At this time, the tension member 210 is disposed through the tension hole 221 of the shoe 220 at the portion where the piles 200 are connected, and the tension hole 221 of the shoe 220 is disposed at the end portion of the pile 200, Respectively. The shoe 220 is formed with a fastening hole 222 at a rim portion and a tensile hole 221 formed to be smaller than the diameter of the fastening hole 222 while being superimposed on the fastening hole 222 as shown in FIG. . The tension member 210 is fixed to the tension hole 221 of the shoe 220 and the fastening member 113 penetrating the fastening panel 112 is fastened to the fastening hole 222 Respectively.

When the distance between the outer diameter of the pile 200 and the inner diameter of the excavating unit 110 is large in a state where the pile 200 and the excavating unit 110 are fixed by the clamping member 112 and the clamping member 113 A guide member (not shown) having a predetermined length may be protruded from the outer surface of the file 200 to the inner diameter side of the drilling unit 110 to prevent the file 200 from tilting.

When the shoe 220 is mounted on the end face of the pile 200 without using the tension member 210, only the punching hole 222 is formed in the punch 220, The fastening member 113 may be fastened to the lower end portion of the pile 200 through the fastening panel 112 while the tension member 210 and the shoe 220 are eliminated.

In addition, the file 200 may use a PHC (Pretensioned Spin High Concrete Piles) in the case of providing a prestress or may use all ordinary files such as a steel pipe file, a PHC, a PC and an RC, It is possible to reduce the production cost by specially making the diameter smaller.

The rotary key 115 is a member that engages or disengages with the rotary unit 120 so as to transmit the rotation of the rotary unit 120 to the drilling unit 110. [ As shown in FIGS. 2 and 3A, the rotary key 115 is formed such that one or more of the rotary key 115 protrudes outward from an upper portion of the body 111, but outside the fixed range of the excavating blades 114.

The rotating unit 120 includes a rotating body 121 installed in association with a power source (not shown) such as a motor or the like for rotating the excavating unit 110. On the inner surface of the rotating body 121, An engaging groove 122 is formed in the main body 121 to receive the upper portion of the excavating unit 110 and to engage with the rotary key 115 of the excavating unit 110. [ The rotating body 121 has a hollow shape so that the pile 200 is also accommodated. The excavating unit 110 may be accommodated in the rotating body 121 and the rotating body 121 may be accommodated in the excavating unit 110 depending on the diameter of the pile 200. [ Of course, depending on the structure to be accommodated, the forming positions of the engaging groove 122 of the rotating body 121 and the rotary key 115 of the excavating unit 110 are variable.

≪ Embodiment 2 >

A drilling apparatus 100 according to a second embodiment of the present invention includes a drilling unit 110 mounted on a lower portion of a tread bar as shown in Figs. 4A to 5B, (Not shown). Hereinafter, the case where the core member accommodated in the excavating unit 110 and fixed is the tread bar 300 will be described. In addition, the same reference numerals are given to the same components as those of the first embodiment described with reference to FIGS. 1 to 3C, and the detailed description will be replaced with the above description and briefly described as necessary .

First, the tread bar 300 will be described. As shown in FIG. 5B, the tread bar 300 is embedded in a ground such as a soft ground through a filler S such as concrete to improve the strength of the ground. The tread bar 300 is provided with a reinforcement member 310 in the form of a circular plate and a polygonal plate positioned at a predetermined height to improve the frictional force between the tread bar 300 and the filler S, The stopper 320 is mounted on the tread bar 300 so that the stopper 320 can be moved. Of course, the tread bar 300 may be provided with a coupler 330 (see FIG. 8A) for connecting a plurality of tread bars 300 and may include a center riser (not shown) for maintaining the center of the tread bar 300 Can be installed. The coupler 330 and the center riser (not shown) are conventional ones, and a detailed description thereof will be omitted.

Therefore, the excavating unit 110 in the second embodiment is modified to fix such a tread bar 300. 4A to 5B, the excavation unit 110 includes a body 111 in which one side portion of the tread bar 300 is inserted through a hollow cylindrical column-shaped open side, A fastening member 113 mounted on one side or both sides of the fastening panel 112 while being mounted on the tread bar 300 through the fastening panel 112, An excavating blade 114 fixed to the outer surface of the body 111 in a substantially threaded shape and a rotary key 115 protruding from the outer surface of the body for engaging and disengaging the rotary unit 120. At this time, a part of the tread bar 300 passing through the fastening panel 112 is arranged so as to protrude outward, and a part of the lower end side of the protruded tread bar 300 is allowed to smoothly work together with the center key 116 Or the function of the center key 116 in the absence of the center key 116. A plurality of shear resistance keys 117 are formed on the inner surface of the body 111. The shear resistance key 117 is used to insert the filler S and the body 111) can be improved.

This excavation unit 110 is similar to the excavation unit 110 of Fig. 1 and will be described with respect to the modified components. Of course, the deformed components are changed in shape, but the basic functions are the same as those in Fig.

First, a center key 116 protruding outward is provided on the lower surface of the fastening panel 112 as shown in FIG. 4A. At this time, the center key 116 is formed as a pair of substantially right triangular shapes on both sides so as not to interfere with the tread bar 300 passing through the center of the fastening panel 112.

As shown in FIG. 5A, the excavating blades 114 may be installed in a plurality of pairs at the same height on the same side in the height direction, or alternatively, Or the like. The two excavation blades 114 installed at the same height are arranged in the same plane as any one of approximately half of the annular shape fixed at an angle along the outer surface of the body 111, It is made up of another one. At this time, the height of the body 111 may also vary according to the number of the excavating blades 114 installed in the height direction.

The rotating unit 120 includes a rotating body 121 and an inner surface of the rotating body 121 is formed with an engaging groove 122 for engaging with the rotating key 115 of the excavating unit 110. The rotating body 121 has a hollow shape capable of receiving the tread bar 300.

<Ground reinforcement method>

Hereinafter, a ground reinforcement method using the excavation apparatus 100 according to the present invention will be described. Referring to FIG. 6, the reinforcing method using the excavating apparatus 100 according to the present invention will be described with reference to FIG. 6. The reinforcing method using the excavating apparatus 100 according to the first embodiment of the present invention, ) Will be described in detail with reference to Figs. 7A to 8C.

First, the excavating unit 110 is mounted on one end of the pile 200 (S100). As shown in FIG. 7A, the one side of the pile 200 is accommodated through one open side of the excavating unit 110, and a fastening member 112, which penetrates the fastening panel 112 mounted on the other surface of the excavating unit 110, (113) is fastened to a shoe (220) fixed to one end face of the pile (200). At this time, a fastening hole 222 is formed in the shoe 220, and a fastening member 113 is fastened to the fastening hole 222. When the prestress is provided by using the tension member 210 while connecting the plurality of files 200, the tension member 210 is inserted into the shoe 230 of the rearmost pile 200 through the tension hole 221, And the lower end is fixed to the tension hole 221 provided at the lower end. Of course, when the tension member 210 is excluded, the fastening member 113 passing through the fastening panel 112 may be directly fastened to the end surface of the pile 200 while excluding the shoe 220. When the core member is the tread bar 300 as in the excavation apparatus 100 of the second embodiment, one side of the tread bar 300 is received through the open side of the excavation unit 110 as shown in FIG. do. At this time, a part of the lower end side of the tread bar 300 is positioned through the fastening panel 112 mounted on the other surface of the drilling unit 110, and the fastening member 113 is fastened to the tread bar 300, 112). Thereby firmly securing the tread bar 300 to the fastening panel 112.

Next, the rotating body 121 of the rotating unit 120 is fastened to the excavating unit 110 (S110). This is accomplished by fastening the rotary key 115 formed on the body 111 of the excavating unit 110 to the locking groove 122 formed on the inner surface of one side of the rotating body 121. 7A or 8A, the rotating body 121 is moved to the excavation unit 110, the rotary key 115 is inserted into the locking groove 122, and then the rotary key 115 is rotated at a predetermined angle, So that the locking groove 122 is completely locked. The file 200 or the tread bar 300 is accommodated in the rotating body 121 while the rotating body 121 moves to the excavation unit 110 in this way.

Next, the rotary unit 120 and the excavating unit 110 are excavated by rotating the ground (S120). 7B or 8B, when the rotating body 121 is rotated in one direction by the power source (not shown) connected to the rotating unit 120 and is advanced toward the ground, the rotating key 115 and the engaging groove 122 Through the coupling, the excavation unit 110 simultaneously rotates in one direction and is pivoted. Therefore, the excavating vane 114 fixed to the body 111 of the excavation unit 110 is advanced while excavating the ground to form grooves in the ground. If the excavation unit 110 is repeatedly reciprocated from the bottom surface of the groove to a predetermined height to stir the surrounding ground, the filling material S is injected along with the stirring operation (S131) . Thereby forming an expanded reinforcing portion E. The expanded reinforcing portion (E) improves the supporting force of the tip portion against the vertical and horizontal loads applied from the ground. Since the file 200 or the tread bar 300 is accommodated in the rotating body 121, the excavating unit 110 and the rotating body 121 are rotated while digging the ground, Or the tread bar 300 is protected from the side surface of the groove formed in the ground by the rotating body 121 and the excavating unit 110 so that the contact with the side surface of the groove is blocked as much as possible, Cracks or damage to the file 200 or the tread bar 300 are completely prevented. Since the lower surface of the fastening panel 112 side of the excavation unit 110 is in close contact with the bottom surface of the groove to prevent a gap from being formed due to clay as in the conventional art, The tread bar 300 can be more firmly supported against the underground load. At this time, in the case of the tread bar 300, a part of the lower end of the through-hole of the fastening panel 112 serves as the center key 116, and it can be stuck to the bottom of the excavated groove.

Next, the rotation of the rotary unit 120 and the excavation unit 110 is stopped, and excavation of the ground is completed (S130). At this time, it is preferable that the shape of the excavated groove is wider on the side surface than on the other portions.

Thereafter, the filler S is filled in the excavated groove (S131). 7B or 8B, the excavating unit 110 reciprocates to a predetermined height from the bottom of the groove formed in the ground to fill the filler S primarily by stirring the ground, thereby forming the extended reinforcement E do. Thereafter, as shown in FIG. 7C or FIG. 8C, the grooves from the top to the ground of the extended reinforcing portion E are filled with the filler S in the second place and cured. The filler S may be a mortar filled in the expanded reinforcing portion E and the filler S from the upper portion of the expanded reinforcing portion E to the ground may be concrete or soil cement . Of course, the expanded reinforcement E and the filler S filled in the groove to the ground may be the same material.

Finally, the rotating body 121 is separated from the excavation unit 110 and taken out from the ground (S140). This is because the rotation key 115 of the body 111 of the digging unit 110 is rotated by a predetermined angle in the direction opposite to the rotation for advancing the rotating body 121 to the ground, (122) and withdraw from the ground. During this operation, as shown in FIG. 7C or FIG. 8C, the filler is charged around the pile 200 while continuously supplying the filler S while lifting up the rotor 121 and pulling it out.

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: drilling rig 110: drilling rig
111: body 112: fastening panel
113: fastening member 114:
115: rotation key 116: center key
117: Shear resistance key 120: Rotation unit
121: rotation body 122:
200: file 210: tension member
220: Shu 221: Tension hole
222: fastening hole 230: reinforcing band
300: Tread bar 310: Reinforcing member
320: Stopper 330: Coupler
S: Filler E: Expansion reinforcement.

Claims (14)

1. An apparatus for penetrating a ground file (200) in a ground to reinforce a ground,
A hollow body 111 received at one side of the side of the file 200, a fastening panel 112 coupled or separated to close the other side of the body 111, a fastening panel 112, An excavating blade 114 formed in a threaded shape on an outer surface of the body 111 for excavating the ground while rotating and advancing, a fastening member 113 fastened to one side surface of the pile 200 housed in the body 111, And a drilling unit 110 having an upper portion of the body 111 and a rotary key 115 protruding outwardly from a position outside the range where the drilling blade 114 is formed. .
The method according to claim 1,
The pile 200 is provided with a shoe 220 of a predetermined thickness mounted on one end surface of the pile 200 to be fastened to the fastening member 113,
Wherein the shoe (220) is formed with a fastening hole (222) for fastening the fastening member (113).
3. The method of claim 2,
A tension hole 221 is formed in the shoe 220 to partially overlap with the fastening hole 222,
When a plurality of files 200 are connected and a prestress is provided to the filler S between the body 111 and the file 200, the tensile member 221 Wherein one end of the tensile member is fixed to the tensile hole at one end of the pile 200 accommodated in the body 111, Drilling rigs.
The method according to claim 1,
At least one center key 116 protruding outwardly to catch the center of the rotating drilling unit 110 is provided at symmetrical parts of both sides of the clamping panel 112, Features a drilling rig for foundation files.
The method according to claim 1,
The excavating wings 114 are fixed along the outer surface of the body 111 in the form of one integrated body and inclined at both ends in the form of threads having different heights,
Wherein each of the excavating blades 114 is inclined so that the height of the both ends is fixed along the outer surface of the body 111. The neighboring excavating blades 114 are arranged to be inclined in mutually opposite directions,
Wherein each excavation blade (114) is arranged in a staggered configuration with different elevations on the side, or a pair of two excavation blades (114) are arranged in pairs at the same height and at mutually symmetrical positions Device.
An apparatus for penetrating a tread bar (300), which is a core, to reinforce a ground,
A hollow body 111 that is received through one side of the tread bar 300 that is open at one end, a fastening panel 112 that is coupled to or separated from the other side of the body 111, a tread bar 300, A fastening member 113 fastened to the fastening panel 130 and fastened to the fastening panel 130 to fasten the tread bar 300 and an excavating blade 114 formed in the form of a thread on the outer surface of the body 111 for excavating the ground while rotating and advancing, And a drilling unit (110) having a rotary key (115) protruding outwardly from a position outside the range where the drilling blade (114) is formed on the upper part of the body (111).
The method according to claim 6,
The tread bar 300 includes a reinforcing member 310 disposed to penetrate the tread bar 300 to closely contact the tread bar 300 and a filler S filled in the body 111, And a stopper (320) mounted on the tread bar (300)
Further comprising at least one of a coupler (330) installed to connect a plurality of tread bars (300) and a center riser to maintain the center of the tread bar (300).
8. The method of claim 7,
Wherein the body (111) comprises a shear resistance key (117) protruding from the inner surface toward the center to improve the adhesion and adhesion between the filler (S) and the inner surface of the body (111).
The method according to claim 6,
At least one center key 116 protruding outwardly to catch the center of the rotating drilling unit 110 is provided at symmetrical parts of both sides of the clamping panel 112, Features a drilling rig for foundation files.
The method according to claim 6,
The excavating wings 114 are fixed along the outer surface of the body 111 in the form of one integrated body and inclined at both ends in the form of threads having different heights,
Wherein each of the excavating blades 114 is inclined so that the height of the both ends is fixed along the outer surface of the body 111. The neighboring excavating blades 114 are arranged to be inclined in mutually opposite directions,
Wherein each excavation blade (114) is arranged in a staggered configuration with different elevations on the side, or a pair of two excavation blades (114) are arranged in pairs at the same height and at mutually symmetrical positions Device.
11. The method according to any one of claims 1 to 10,
A rotating body 121 having an inner surface formed with an engaging groove 122 for receiving the core and engaging with the rotary key 115 to rotate the excavating unit 110 fixed to the core, And a rotation unit (120) having a power source installed in association with the rotation unit (120) so as to rotate the rotation unit (120).
The file 200 or the one end side portion of the tread bar 300 is accommodated through one side open to the drilling unit 110 of the excavation apparatus 100 of claim 11 and the file 200 or the tread bar 300 100 th step S100 of coupling to the excavation unit 110;
110) S110 of coupling the rotary unit 120 to the excavation unit 110;
The rotary unit 120 is rotated by a power source to rotate the excavating unit 110 and the core material as the pile 200 or the tread bar 300 to thereby form the excavating blades 114 mounted on the outer surface of the excavating unit 110 A step 120 (S120) of excavating the ground using the soil;
Step 130 (S130) in which the excavation is completed;
A step 131 (S131) of injecting the filler S into the groove in the ground formed by the excavation;
And a step (S140) of separating the rotary unit (120) from the excavation unit (110) and drawing it out of the ground.
13. The method of claim 12,
The excavation unit 110 is reciprocated to a predetermined height from the bottom of the grooves formed in the ground to form the expanded reinforcing portion E by first injecting the filler S while stirring the ground , And the filler (S) is secondarily injected into the groove from the upper part of the expanded portion (E) to the ground.
The method according to claim 12 or 13,
Wherein the filling material S is continuously injected while the rotating body 121 is drawn out in the step 140).

Images