KR101444225B1 - Micropile - Google Patents

Abstract

The present invention relates to a micropile which has a support area of a front end of a pile expanded from an expanded hole which comes out of an end of a casing so as to stably expand and support the support area of the front end of the pile, thereby preventing the structural deformation of the pile and deformation of a base and preventing concentration of load at a continuously connected portion at the time of occurrence of a compressive force or horizontal earth pressure. More particularly, the micropile includes: a casing which is inserted into the boundary of the rock stratum after a hole is drilled to the weak stratum and the rock stratum of the ground; a coupler which is inserted into the casing to form an expanded base and to which tread bars or deformed bars each having an outer circumferential surface on which a spiral is formed are continuously connected; central spacer members of a disk form connected at every setting section in a tiny size in order to maintain the center of the tread bars or the deformed bars, each of which has a connection hole formed at the center and a plurality of hollow portions hollowed toward the center along the circumference; and front end supporters which are connected to the front end of the tread bar or the deformed bar, maintain an upwardly bent state by contact when the front end supporters pass the casing, and go back to their original position by self-load while the front end supporters pass the front end of the casing to support the inner wall surface of the rock stratum in order to support the front end of the tread bars or the deformed bars and maintain the center. Therefore, the micropile can be applied to various kinds of piles to stably correspond to subsidence using the front end supporters capable of expanding and supporting the front end of the pile by expanding and restoring using a plurality of operators in spite of a change in diameter.

Description

Micropile {Micropile}

More particularly, the present invention relates to a micro pile, and more particularly, to a structure for preventing a structural deformation of a file or a foundation from being deformed by expanding and supporting the end support area of the pile in an extended piercing hole extending out of the end of the casing, So that the load is not concentrated on the continuous connection portion.

In general, when a building or structure is erected, foundation work is performed to reinforce the ground in order to support the upper structure according to the condition of the ground or the load of the structure. For example, if the ground contacted with the structure has sufficient stiffness to support it, such as a hard ground, it is possible to carry out the foundation work directly. However, in case of the soft ground, And strengthening the ground by carrying out designated works to improve the ground, and then to carry out foundation work on the ground.

At this time, the file to be installed on the soft ground is classified into a steel pipe file, a PC file, a PHC file, etc. according to the material thereof, and is classified into a steel pipe file, a tubular file, an H- In such a soft ground, the tubular file is generally used. In addition, microfiles of small diameter piles are used for basic reinforcement work for the retrofitting of existing buildings, or for basic reinforcement work for narrow areas where large excavation equipment is not available. The micro pile is usually a file with a diameter of 250 mm or less and can support a large load with a small diameter hole using small equipment as compared with a general tubular file. Since the micro pile is small in diameter, It is advantageous that it can be installed at any angle from horizontal to horizontal.

These microfiles are installed through a process of inserting the microfiles into the hole of a perforated hole with a certain diameter and length, then filling the filling material such as grout material and integrating the microfiles with the ground.

On the other hand, the supporting force of the micropile is determined by the frictional force generated between the tip end supporting force of the distal end contacting the ground and the inner surface of the ground and the outer surface of the micropile. However, since the micro pile is formed in a cylindrical shape having a very narrow cross-sectional area at the tip end, the tip end holding force of the tip end portion is not so large. That is, when a compressive load due to a building or structure is applied to a microfile, a load may be concentrated on a distal end portion of the microfile. On the contrary, when the tensile load is applied to the microfiles in the upward direction, the frictional force between the outer peripheral surface of the flat microfiles and the inner wall of the ground is weak, so that the microfiles may float upward or may be pulled out. As described above, the conventional cylindrical micro pile is inevitably limited to generate a bearing force due to its morphological characteristics at the time of construction in soft ground. However, in order to compensate for this, it is necessary to increase the length of the micro-file to maximize the length of the micro-file that is pressed into the ground, which causes an increase in cost and deteriorates workability.

Also, in the past, a screw projecting in the horizontal direction was provided on the outer circumferential surface of the micropile to disperse the load concentrated on the distal end of the micropile to compensate the overall supporting force. However, in this case, when a tensile force or a compressive load is applied to the micropile in the vertical direction, the load concentrated on the distal end of the micropile is alleviated, but the load is concentrated on the joint between the screw and the micropile, There is a problem that the joint between the screw and the microfibers is broken by the development, and these are separated from each other.

Korean Patent Application No. 10-2011-0001829 has been proposed as a name of 'microfiles using tread bars having different pitches' in order to solve the problems of the conventional microfiles.

The microfiles using conventional tread bars having different pitches have a tread bar inserted into a perforation hole formed through a soft layer and extending to a rock layer, and a tread bar, which is coupled to the outer surface of the tread bar at a predetermined interval to maintain the center of the tread bar A center spacer, a coupler for connecting the tread bar in the longitudinal direction, a hose installed to inject the filler into the perforation hole, and a fixture coupled to the upper end of the tread bar to enable the upper structure to be fastened A first tread bar having a diameter of 50 mm to 65 mm and a thread formed continuously and repeatedly at a pitch of 8 mm on the outer circumferential surface so as to be positioned in the soft layer; A second tread bar formed to have a pitch different from that of the first tread bar and having a diameter of 50 mm to 65 mm and a thread formed continuously and repeatedly at a pitch of 12 mm to 14 mm on the outer circumferential surface and positioned inside the rock layer; A pitch connecting coupler for connecting the first tread bar and the second tread bar to each other by forming threads having different pitches on the inner circumferential surface so as to correspond to different pitches of the first tread bar and the second tread bar; And a load-bearing lower body coupled to the outer side of the second tread bar so that an adhesive force and a tip end supporting force of the filler can be improved.

However, in order to improve the tip end holding force of the microfiles using the conventional tread bars having different pitches, a separate tread bar having a large thread pitch interval at the tip of the existing microfiles was additionally combined to improve the bearing capacity. However, There is a problem that it takes a lot of time.

In addition, common microfiles according to the above-described prior art have a problem in that manufacturing costs are increased by forming a thread on the entire outer circumferential surface of the file to perform another rolling operation.

In addition, although the microfiles according to the above-described prior art are formed on the outer circumferential surface of the microfiles in order to connect the microfiles with each other according to the depth of the perforations using couplers, when fastening microfiles connected to each other using a coupler, Is assembled by the worker's six senses, the fastening distance to be fastened to the coupler is not the same, and the fastening is biased to one side, so that when a compressive load or horizontal stress is applied, stress concentration phenomenon occurs and breakage easily occurs.

In addition, the central spacing member for holding the center of the microfiles according to the above-described prior art may be deformed due to friction with the perforation holes in the process of inserting the microfiles having increased weight as the connection length increases into the perforation holes, So that it is impossible to vertically construct microfiles.

In addition, there is a problem in that the preforms used in the microfiles according to the prior art operate in a complicated structure and can not be accurately seated in the center of the perforation hole unless the perforation hole is used.

Therefore, when vertical load can not be applied to the micro pile, the pile itself can not support the load properly, and deformation occurs on the foundation due to structural deformation.

As a result, it is possible to construct the file vertically without any deformation due to the weight or external force by using the plate-shaped center spacing material, and to improve the positioning of the tip of the file precisely at the center of the perforation hole Microfiles are required.

1. Application No. 10-2011-0001829 (microfiles using tread bars having different pitches) 2. Registration No. 10-0785258 (Nail mounting spacer and nail insertion ground reinforcement using this) 3. Registration No. 10-1080923 (Microfiber settlement structure and settlement method)

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and it is an object of the present invention to provide a microfilter for various types of files that reliably respond to subsidence by using a line complex, There is a purpose.

It is another object of the present invention to provide a plate material in which the center spacer is not pressed by an external force, so that the piles are held in the perforation hole to be perpendicular.

In addition, another object of the present invention is to move the casing in an inserted state, and then to expand the casing in a perforated hole that is not buried, and to support the end of the file in the center of the perforation hole have.

It is another object of the present invention to provide a center spacer by fastening the front edge zone to each end of a file or a section of a file.

It is a further object of the present invention to provide a method and apparatus for moving a casing in a folded state and returning in a perforated hole in which a casing is not buried to support the inner circumferential surface in four directions, And the like.

In order to achieve the above-mentioned object, the present invention provides a casing for forming a perforation hole up to a soft layer and a rock layer of a ground and then inserted into the boundary of the rock layer, Each of the tread bars and the deformed reinforcing bars is connected to each other in a set interval in order to maintain a center of the tread bar or the deformed reinforcing bar with a finer size than the inner diameter of the casing. And a plurality of through-holes penetrating through the circumferential end of the cylindrical core to form a central spacing member having a plurality of through-holes passing through the circumferential end, the plurality of through-holes passing through the casing, And is positioned at its own position by its own weight passing through the leading end of the casing, The microfiber comprising a tread band or a deformed reinforcing bar supporting the inner wall surface of the tread bar or the deformed reinforcing bar and maintaining the center of the tread bar or the deformed reinforcing bar, wherein the tread band has a first helical groove for screwing the tip of the tread bar, A first reinforcing groove formed in the center of the deformed reinforcing bar so as to be repeatedly inserted into the leading edge and the groove of the deformed reinforcing bar, respectively, the outer reinforcing groove forming four contact surfaces, Wherein a plurality of rectangular wing tips are formed in a circular arrangement and are provided with bending ends which are in contact with the inner wall of the perforation hole on the opposite side of the corresponding face of the support body which is in close contact with the contact face of the support body, And a connecting member is provided on the upper surface of the part so that the blade end can be folded up and down.

As described above, the present invention can be applied to various types of files which can stably cope with settlement by using a line complex which is extended even when the diameter of the casing perforation hole changes.

The center spacing member is formed in a plate shape that is not pressed by an external force, so that the piles are held in the perforation holes so as to be perpendicular to each other.

In addition, after the casing is moved to the inserted state when passing through the casing, the casing is extended in the unfilled holes and supported in all directions so that the tip of the pile can be positioned in the center of the hole.

In addition, there is an effect that the function of the center interval member is performed by connecting the front end zone to each end of the file or each section of the file.

Further, after the casing is moved to the folded state when it is passed through the casing, the casing is returned in the unfilled perforation hole to support the inner circumferential surface in four directions to increase the supporting area and to position the tip of the file in the center of the perforation hole have.

1 is an exploded perspective view showing a file 100C using a tread bar according to the present invention,
Fig. 2 is a perspective view and cross-sectional view of the tread bar and tread band in Fig. 1,
3 is an exploded perspective view showing a file 100C using a deformed reinforcing bar according to the present invention,
Fig. 4 is a perspective view and cross-sectional view of the deformed reinforcing bars and the line complex in Fig. 3,
Fig. 5 is an exploded perspective view of the pre-cut zone applied to Figs. 1 and 3,
Figure 6 is a perspective view of a prefabricated earth according to another embodiment;
7 is a perspective view showing a state in which the support body and the blade end of the wire harness are connected to each other by connecting members of various types of leaf springs,
8 is an exploded perspective view of the hinge in the connecting member,
Fig. 9 is an operational sectional view showing the operation of a wing end by a hinge,
10 is a cross-sectional view showing a through-hole fastening method using a tread bar,
Fig. 11 is a cross-sectional view showing a through-hole fastening method using a deformed reinforcing bar; Fig.
12 is an exploded perspective view showing a file 100D using a tread bar according to the present invention,
Figure 13 is a fastening perspective view and cross-sectional view of the tread bar and tread band in Figure 12,
14 is an exploded perspective view showing a file 100D using a deformed reinforcing bar according to the present invention,
Fig. 15 is a perspective view and cross-sectional view of the tread bar and the line complex in Fig. 14,
Fig. 16 is an exploded perspective view of a tread bar or a tread girder fastened to a deformed reinforcing bar,
17 shows a tread bar and a fastening perspective view and a cross-sectional view in order to use a tread band fastened to a tread bar as a center gap,
18 shows a tread bar and a fastening perspective view and a cross-sectional view, respectively, in order to use a preform fastened to a deformed reinforcing bar as a center spacer;
Fig. 19 is a perspective view showing the fastening guide and the fastening guide,
Fig. 20 is an operational view showing a state in which a contact hole in a pressurized state is expanded,
Figure 21 is a perspective view and cross-sectional view of a tread bar and coupler according to the present invention,
22 is a perspective view and cross-sectional view showing a deformed reinforcing bar and a coupler according to the present invention,
Figure 23 is a perspective view and cross-sectional view of a tread bar and center spacer according to the present invention,
FIG. 24 is a perspective view and cross-sectional view showing a deformed reinforcing bar and a center spacer according to the present invention,
25 and 26 are perspective views showing another embodiment of the coupler,
Fig. 27 is a perspective view showing another embodiment of the center-
28 is a view showing a process of inserting and inserting a file into a casing formed in a perforation hole,
Fig. 29 is an operational sectional view showing a state in which a straight line earth applied to the file 100C extends into the perforation hole through the inside of the casing; Fig.
Fig. 30 is an operational sectional view showing a state in which the line jutting applied to the file 100D extends into the perforation hole through the inside of the casing, Fig.
31 is a view showing the process of fastening the head nut to the pile installed in the casing and constructing the enlarged foundation on the upper side;
FIG. 32 is an example of application of a micro-file using a tread bar according to the present invention in the form of a locking bolt for slope support.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1, the micro pile according to the present invention includes a casing C inserted into the perforation hole H, a tread bar 10 inserted into the casing C, A center spacer 30 for holding the center of the tread bar 10 and the deformed reinforcing bars 60 and a center spacer 30 for supporting the ends of the tread bars 10 and the deformed reinforcing bars 60, Constitute a file 100C with a preform 40 that is folded within the perforation hole C and then restored in the perforation hole H; A coupler 20 for continuously connecting the tread bar 10 or the deformed reinforcing bar 60 inserted into the casing C, a casing C inserted into the hole H, A central spacing member 30 for holding the center of the tread bar 10 and the deformed reinforcing bar 60 in contact with the casing C to support the tip of the tread bar 10 or the deformed reinforcing bar 60 And then forms the pile 100D with the preform 40 projecting outward from the perforation hole H after passing through the inserted state.

As shown in FIGS. 1 and 3, the files 100C and 100D constitute a casing C which is inserted up to the boundary of the rock layer after forming the perforation hole H up to the soft layer and the rock layer of the ground .

A coupler 20 for continuously connecting the tread bars 10 and the deformed reinforcing bars 60 with the spiral 11 formed on the outer peripheral surface thereof for inserting into the casing C to form an enlarged base do.

Each of the tread bars 10 and the deformed reinforcing bars 60 has a smaller diameter than the inner diameter of the casing C. Each of the tread bars 10 and the deformed reinforcing bars 60 has a fastening hole 31 formed at its center, Shaped central spacing member 30, which is formed by a plurality of through holes 32 that are recessed toward the center side along the central axis 30.

Hereinafter, the constructional characteristics of the line complex 40 according to the various embodiments will be described.

One. As shown in FIGS. 1 and 3, the line complex 40 is fastened to the tip of the tread bar 10 or the deformed reinforcing bar 60, and when it passes through the casing C, So that the inner wall surface of the rock layer is supported by its own weight passing through the tip end of the casing C so as to maintain the leading end support and the center of the tread bar 10 and the deformed reinforcing bar 60 .

1-1. 1 to 5, the line complex 40 includes a first helical groove 41a for fastening a helical thread to the tip of the tread bar 10, a leading end node 61 of the deformed reinforcing bar 60, A first reinforcing groove 45 is formed at the center of the first reinforcing groove 45 so as to be repeatedly inserted into the groove 62 and the nail coupling groove 45a and the nail projection 45b, A support body 48 having a polygonal shape is formed.

A rectangular blade 49 having a curved end 49b contacting the inner wall of the perforation hole H is formed on the opposite side of the corresponding surface 49a of the supporting body 48 which is in close contact with the contact surface 48a. Are formed in a circular arrangement.

In order to interconnect the support body 48 and the blade end 49, a connecting member 70 is provided on the upper surface of the close contact portion so that the blade end 49 can be folded up and down.

1-2. As shown in FIG. 6, the line complex 40 has a first helical groove 41a for joining the tip end of the tread bar 10 and a leading end node 61 of the deformed reinforcing bar 60, And the outer circumferential surface is formed in the center of the first reinforcing groove 45 formed repeatedly so as to be inserted into the second fitting groove 45a and the nodule protrusion 45b, Thereby forming the body 48.

A half-moon-shaped blade 49 having a curved end 49b contacting the inner wall of the perforation hole H is formed on the opposite side of the corresponding surface 49a of the supporting body 48, Are formed in a circular arrangement.

In order to interconnect the support body 48 and the blade end 49, a connecting member 70 is provided on the upper surface of the close contact portion so that the blade end 49 can be folded up and down.

The first spiral groove 41a of the support body 48 is configured to fasten the tread bar 10 and the first reinforcement groove 45 is formed in the first reinforcing groove 45. [ Is a construction for fastening the deformed reinforcing bars 60. [

In addition, although the diameter of the line complex 40 is larger than that of the casing C, when the blade 50 is inserted into the casing C, the blades 49 are rotated upward due to contact with the inner wall surface, The insertion operation is performed.

7 to 9, the connecting member 70 for connecting the support body 48 and the blade end 49 may be formed by a hinge 71 or a leaf spring 75, 71 or the plate spring 75 may be mixed.

Here, the hinge 71 is composed of the first hinge piece 72 and the second hinge piece 73.

The first hinge piece 72 has a first shaft hole 72b passing through the center at one end of a first coupling end 72a coupled to the support body 48 and a first hinge end 72c ).

At this time, the first hinge end 72c is partially cut to form a cut space 72d, and the stopper 72e is inclined outward at the upper end of the cut space 72d.

The second hinge piece 73 is inserted into the cut space 72d of the first hinge piece 72 and the second hinge edge 73b of the 'C' shape passing through the center of the second shaft hole 73a. And a second coupling end 73c formed on one side thereof.

In addition, a hinge shaft 74 is inserted and coupled to the first and second shaft holes 72b and 73a.

That is, when the second hinge pin 73 is rotated upward with respect to the hinge shaft 74, the stopper 73 is inclined toward the wing tip 49 by about 70 to 80 degrees 72e so as not to rotate any more.

The plate spring 75 may be formed in a wide plate shape or may have an arcuate coupling end which is coupled to the support body 48 and the blade end 49 at both ends of an arch end 75a formed in an arch- 75b are integrally formed.

10 and 11, the support body 48 has a first spiral hole 41a through which the tread bar 10 passes and which is threadedly coupled to the support body 48, And the tip ends of the tread bar 10 and the deformed reinforcing bars 60 can be installed so as to be aligned with the lower surface of the support body 48 due to manufacturing characteristics.

2. As shown in Figs. 12 and 14, when the tread bar 10 or the deformed reinforcing bar 60 is fastened to the front end of the deformed reinforcing bar 60 and passes through the casing C, the front end of the casing C And supports the inner wall surface of the rock layer by horizontally protruding by an elastic force to constitute a line complex 40 which keeps the leading end support and center of the tread bar 10 and the deformed reinforcing bar 60.

2-1. 12 to 16, the line complex 40 has a first helical groove 41a for joining the tip of the tread bar 10 and a leading end node 61 of the deformed reinforcing bar 60, And a fixing hole 41b is formed in the periphery where the first reinforcing groove 45 is repeatedly formed so as to be repeatedly inserted into the nodal groove 62a and the nodal fixing groove 45a and the nodal projection 45b, Thereby forming the coupling 41.

A plurality of fastening openings 43 are formed in the lower part of the fastening bolt 41 and formed with guide holes 43a on the center line moving outwardly by the elastic members 42. As shown in FIG.

And a fastening guide 44 that passes through the guide hole 43a in the lower portion of the contact hole 43 and then passes through the fastening hole 41b and is fastened to the fastener coupling 41. [

2-2. 17 and 18, the line complex 40 is provided with a first spiral hole 41c through which the tread bar 10 passes and which is to be spirally engaged, a leading edge node 61 of the deformed reinforcing bar 60, And a first reinforcing hole 46 in which the nested engaging groove 45a and the nodule protrusion 45b are repeatedly formed so as to be respectively inserted into the fixing hole 62 and the fixing hole 41b, 41).

Here, a plurality of fasteners 43 having a guide hole 43a formed on the center line, which is circularly arranged below the fastener coupling member 41 and moves outward by the elastic member 42,

The second helical hole 44e and the nodelocking groove 45a to which the tread bar 10 and the deformed reinforcing bar 60 having passed through the first helical hole 41c and the first reinforcing hole 46 are respectively fastened, And a second reinforcing hole 47 is formed at the center of the second reinforcing hole 47 so as to be repeatedly formed in the fixing hole 41b and passes through the fixing hole 41b after passing through the guide hole 43a in the lower portion of the fitting hole 43 And a fastening guide (44) fastened to the fastening bolt (41).

That is to say, the fastening guide 44 formed with the first helical hole 41c and the first reinforcing hole 46, the fastening guide 44 formed with the second helical hole 44e and the second reinforcing hole 47, Is configured to be capable of functioning as a center spacer for maintaining the center of the tread bar 10 or the deformed reinforcing bar 60. [

16, 19, and 20, the fittings 43 of the line complex 40 constituting the files 100C and 100D are provided with elastic members (not shown) on the rear surface 43b ' 42 are inserted and supported, and the lower portion of the front surface is formed as a curved surface 43c.

At this time, the curvature surface 43c is connected to the tread bar 10 or the deformed reinforcing bar 60 so as to minimize frictional force when inserting the tread bar 10 into the casing C, so that the insertion process is not difficult.

The fastening guide 44 has a support end 44a protruding from the lower end of the fastening guide 44 and contacting the lower surface of the fastening bolt 41 and supporting the elastic member 42 on the outer circumferential surface.

A coupling rod 44b which is circularly arranged around the support end 44a and passes through the guide hole 43a and the fixing hole 41b in order and is coupled in a nut or rivet manner is protruded.

The support end 44a has a plurality of support surfaces 44d each having a support groove 44c into which the elastic member 42 is inserted.

At this time, the support surface 44d of the support end 44a is formed differently according to the number of the close fittings 43. In the present invention, for example, three support fittings 43 are formed by three support surfaces 44d But the shape of the supporting end 44a may be different depending on the number of the supporting surfaces 44d.

21 and 22, a tread bar 10 and a deformed reinforcing bar 60, which are inserted into the casing C to form an enlarged base, and in which a spiral 11 is formed on the outer peripheral surface, And constitute a coupler 20 for connecting them.

23 and 24, the fastening hole 31 of the center spacer 30 is formed with a helix 31a for connecting the tread bar 10, and the deformed reinforcing bar 60 is connected A groove 31b for fastening the nodal body 61 to the nodal groove 62 and a nodal fitting projection 31c are formed repeatedly to form a hole.

25 and 26, each of the couplers 20 is provided at both ends of the body 21 of the coupler 20 so that the tread bar 10, When the reinforcing bars 60 are connected to each other, it is possible to disperse and stepwise support the load acting on the entirety of the piles 100C and 100D around the coupler 20, To increase the structural rebound strength.

27, the center spacers 30 may be formed of a plurality of different diameters such that the coupler 20 coupled to the tread bar 10 or the coupler 20 coupled to the deformation reinforcing bar 60 is connected to the center The first center-spacing member 30a having a small diameter and the second center-spacing member 30b having a diameter larger than the first center-spacing member 30a and finer diameter than the inner diameter of the perforation hole 200 are sequentially They may be fastened at regular intervals.

The operation and effect of the present invention constructed as described above will be described below.

28, in order to construct the files 100C and 100D in common, the ground is punctured to form a perforation hole H, and then the casing C is hammered into the casing C, Is inserted into the boundary between the soft layer and the rock layer of the ground.

In this case, the casing C is firstly subjected to hunting and then a separate punching device is used to move the casing C past the front end of the casing C to form a hole H (H) with a diameter larger than the diameter of the casing C. [ The additional bit may be used to extend the wire harness 40 to be supported.

As shown in FIGS. 1, 2, 12, 14, and 28, the tread bars 10 and the deformed reinforcing bars 60 of the files 100C and 100D, respectively, To connect them continuously.

The tread bars 10 and the deformed reinforcing bars 60 are provided with a center spacing 30 at intervals of 9 to 11 m in the tread bars 10 and the deformed reinforcing bars 60, 10 and the deformed reinforcing bars 60 are provided at intervals of 1 to 3 m in the tread bars 10 and the deformed reinforcing bars 60 located on the supporting layer.

Here, the numerical representation of the spacing of the spacers 30 may be varied in design, depending on the nature of the geology and structure.

The central spacing member 30 fastened to the tread bar 10 has a center spacing 30 which is fastened to the spiral 11 and the fastening hole 31 and fastened to the deformed reinforcing bar 60, And the nodule fitting groove 31b of the fastening hole 31 and the nodule fitting projections 31c formed between the nodule 61 and the nodule 61 between the nodule 61 and the nodule 61 of the deformed reinforcing bar 60 Tighten to fit each.

In order to support the tip end of the tread bar 10 or the deformed reinforcing bar 60, it is possible to prevent the tread bar 10 and the deformed reinforcing bar 60 from being bent in the casing C, The assembling and operation of the line complex 40 protruding outward from the perforation hole H after passing through the contacted and inserted state will be described as follows.

As shown in Figs. 5, 7, and 8, it is folded in the casing C to support the tip of the tread bar 10 or the deformed reinforcing bar 60 and is restored in the perforation hole H after passing When the connecting member 70 is the hinge 71 in a state in which the contact surface 48a of the supporting body 48 and the corresponding surface 49a of the blade end 49 are in close contact with each other, The coupling end 72a is welded to the upper surface of the support body 48 and the second coupling end 73c is welded to the upper surface of the blade end 49 so that the support body 48 is fixed So that the blade end 49 can rotate upward.

When the connecting member 70 is in the form of a leaf spring 75, the contact surface 48a of the supporting body 48 and the corresponding surface 49a of the blade 49 are in close contact with each other, The upper end surfaces of the support body 48 and the blade end 49 are welded at both ends while the arch end 75a is formed at the center. 49 and the upper surface of the support body 48 and the wing end 49 respectively are positioned at the center of the arch end 75a in a state in which the line surface in contact with the corresponding surface 49a of the support body 48, And each of them is fixed by a welding method, thereby completing the assembly. Thus, there is a feature that a simple structure and manufacturing cost can be reduced.

29, the prefabricated prefabricated zone 40 is formed by spirally fastening the tip of the tread bar 10 to the first helical groove 41a of the support body 48, Is screwed into the first reinforcing groove (45) of the supporting body (48).

At this time, when the first spiral hole 41c of the support body 48 is formed, the tread bar 10 is screwed into the first spiral hole 41c and the first reinforcing hole 46 of the support body 48 The deformed reinforcing bar 60 is fastened to the nose portion 61 and the nose groove 62 to support the tip of the tread bar 10 or the deformed reinforcing bar 60. [

When the tread bar 10 or the deformed reinforcing bar 60 having been joined with the center spacer 30 and the front joint 40 is inserted into the casing C, The casing C contacts the inner wall surface and rotates upwardly while being connected to the connecting member 70. [

At this time, the wing end 49 is caught by the stopper 72e when it rotates upward with respect to the hinge shaft 74 together with the second hinge end 73 of the connecting member 70, Even if the casing 100C is eccentrically inserted in the casing C, the horizontal force is naturally maintained by the supporting force of the stopper 72e.

Thereafter, the tread end 50 and the deformed reinforcing bar 60 are continuously inserted, and the wing end 49, which has been in contact with the inner wall surface of the casing C after passing through the inside of the casing C, The support member 48 is supported by the wall surface of the rock layer H of the perforation hole H in place so as to be parallel to the support body 48 by the self weight of the blade end 49. [

In addition, when the plate spring 75 is used in combination, the blade tip 49 returns to its original shape rapidly.

As shown in Figs. 16 and 20, in order to support the tip of the tread bar 10 or the deformed reinforcing bar 60, The protruding line complex 40 is provided with the fitting openings 43 at intervals of 120 degrees to the lower portion of the linear fitting 41 and then the connecting rods 44b of the fastening guides 44 are inserted into the fitting openings 43 The elastic member groove 43b of the fitting member 43 and the supporting end 44a of the fitting guide 44 are formed so as to pass through the guide hole 43a and the fixing hole 41b of the non- And both ends are inserted into the support groove 44c of the support surface 44d to be formed.

Although the nut may be fastened to the coupling rod 44b passing through the fixing hole 41b, the coupling rod 44b may be coupled with the fastening bolt 41 using the rivet method described in the present invention, Thereby reducing processing costs and component costs.

30, the prefabricated prefabricated zone 40 is provided with a first spiral groove 41a formed in the prefabricated bulb 41 of the prefabricated tread 40, And the tip of the deformed reinforcing bar 60 is screwed into the first reinforcing groove 45 formed in the reinforcing bar 41 of the reinforcing bar 40.

When the first spiral hole 41c and the second spiral hole 44e are formed in the fastener coupling 41 and the fastening guide 44 of the linear expansion joint 40, The first reinforcing hole 46 and the second reinforcing hole 46 are formed in the first helical hole 41c and the second helical hole 44e by means of spiral fastening, When the second reinforcing hole 47 is formed, the deformed reinforcing bar 60 passes through the joint 61 and is joined to the tread bar 10 or the distal end of the deformed reinforcing bar 60, There is a feature that can be.

When the tread bar 10 or the deformed reinforcing bar 60 having been joined with the center spacer 30 and the front joint 40 is inserted into the casing C, The casing C contacts the inner wall surface and presses the elastic member 42 and is horizontally moved in the direction of the center of the preform fastener 41 and the fastening guide 44 and inserted.

Thereafter, the tread bar 10 or the deformed reinforcing bar 60 is continuously inserted, and the tight fitting hole 43, which has been in contact with the inner wall surface of the casing C after passing through the inside of the casing C, And is supported on the inner wall surface of the rock layer H of the perforation hole H while moving to the outside due to the restoring force of the elastic member 42. [

At this time, the fitting hole 43 of the fitting hole 43 passes through the fitting hole 44b of the fitting guide 44 into the guide hole 43a and moves to the end point of the guide hole 43a, will be.

When the tightening guide 44 is brought into contact with the bottom surface of the perforation hole H by advancing the tread bar 10 or the deformed reinforcing bar 60 in a state where the close contact 43 is projected, And the tips of the tread bars 10 and the deformed reinforcing bars 60 are precisely installed at the center of the perforation hole H as the inner diameter of the perforation hole H is uniformly divided .

The frictional force is small due to the curved surface 43c when the contact member 43 is moved in contact with the inner wall of the perforation hole H formed in the casing C or the rock layer, have.

31, when the insertion of the tread bar 10 or the deformed reinforcing bar 60 is completed, the grouting hose 200 is inserted through the through hole 32 of the center spacer 30, As the filling height increases, the grouting hose 200 is moved upward to fill the hole.

At this time, the grouting is performed in the space formed by the support body 48 and the blade end 49 of the line complex 40, the fastening bolt 41 and the fastener 43, the fastening guide 44, The tread bars 10, the deformed reinforcing bars 60 and the center spacers 30 are enclosed in the casing C and the grouting is fired in an integrated form so that the structural support strength is not reduced.

In addition, even if the load of the structure is transferred to the piles 100C and 100D by the prefabricated area 40, the concentrated stress is dispersed and the rock layer is prevented from being eroded.

Thereafter, when the grouting operation is completed, unnecessary grouting exposed upward is removed.

Next, a fixing plate is installed on the top of the tread bar 10 or the deformed reinforcing bar 60, which is exposed to the ground, with a lower nut fastened to the top of the fixing plate. 100D are reinforced and then the enlarged base 300 suitable for the purpose is installed.

As shown in FIG. 32, the files 100C and 100D according to the present invention can be used as a horizontal foundation foundation supporting a vertical load. However, the files 100C and 100D can also be used in the form of a soil nail or a rock bolt It is possible to change the usage, and it can be used for rock bolts and so on.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: Tread bar 11: Spiral
20: Coupler 21: Body
22: Referee during coupler 30: Center spacer
30a: first center-spacing member 30b: second center-
31: fastening hole 31a:
31b: Momentum fitting projection 32: Through hole
40: Jinshang District
41: Ship assembly 41a: First spiral groove
41b: Fixing hole 41c: First helical hole
42: elastic member 43:
43a: Guide hole 43b: Elastic member groove
43b ': rear face 43c: curvature face
44: fastening guide 44a: support end
44b: engaging rod 44c: support groove
44d: Support surface 44e: Second helical hole
45: first reinforcing bar groove 45a:
45b: nodule projection 46: first reinforcing hole
47: second reinforcing hole 48: support body
48a: close face 49: wing edge
49a: Corresponding surface 49b: Curved end
60: deformed reinforcing bars 61:
62: Nest groove
70: connecting member 71: hinge
72: First hinge end 72a: First hinge end
72b: first shaft hole 72c: first hinge stage
72d: incision space 72e: stopper
73: second hinge piece 73a: second shaft hole
73b: second hinge end 73c: second coupling end
74: hinge end 75: leaf spring
75a: arch stub 75b: arch stub
100C, 100D: File
200: Grouting hose 300: Enlargement foundation
C: Casing H: Perforation hole

Claims (13)

(C) to be inserted up to the boundary of the rock layer after forming the perforation hole (H) to the soft layer and the rock layer of the ground, and to form an enlarged foundation by being inserted into the casing (C) The tread bar 10 and the deformed reinforcing bars 60 constitute a coupler 20 for continuously connecting the tread bars 10 and the deformed reinforcing bars 60 formed with the tread bars 10 and the deformed reinforcing bars 60, And a plurality of through holes 32 penetrating through the circumferential ends of the through holes 32 to form a plurality of through holes 32, And is connected to the ends of the tread bar 10 and the deformed reinforcing bars 60 so as to be in a state of being folded upward by contact when passing through the casing C, And is positioned in its original position by its own weight In a micro pile constituting a line complex 40 that supports the inner wall surface of the rock layer and keeps the leading end support and center of the tread bar 10 and the deformed reinforcing bar 60,
The line complex 40 is formed so as to be inserted into the first helical groove 41a for screwing the tip of the tread bar 10 or the leading end node 61 and the node groove 62 of the deformed reinforcing bar 60, A polygonal support body 48 having a first reinforcing groove 45 formed at the center thereof and having an outer circumferential surface forming four contact surfaces 48a is formed in such a manner that the first and second reinforcing grooves 45a and 45b are repeatedly formed. Forming,
A wing tip 49 of a rectangular shape having a curved end 49b contacting the inner wall of the perforation hole H is formed on the opposite side of the corresponding surface 49a of the supporting body 48 which is in close contact with the close surface 48a, A plurality of them are arranged in a batch,
A connecting member 70 is installed on the upper surface of the close contact portion so that the wing end 49 can be folded up and down in order to interconnect the support body 48 and the blade end 49. [ file. delete 2. The tread bar according to claim 1, wherein the line complex (40) comprises a first helical groove (41a) or a leading edge node (61) of the deformed bar (60) Shaped support body 45 which is formed at the center of the first reinforcing groove 45 formed so as to repeatedly have the nod engaging groove 45a and the nodule protrusion 45b so as to be respectively inserted into the first reinforcing groove 45 and the third reinforcing groove 45, (48)
A wing tip 49 of a half-moon shape having a curved end 49b contacting the inner wall of the perforation hole H is formed on the opposite side of the corresponding surface 49a which is in close contact with the close contact surface 48a of the support body 48, A plurality of them are arranged in a batch,
A connecting member 70 is installed on the upper surface of the close contact portion so that the wing end 49 can be folded up and down in order to interconnect the support body 48 and the blade end 49. [ file. The connector according to claim 3, wherein the connecting member for connecting the supporting body and the blade end is formed by a hinge or a leaf spring, (75) are mixed with each other. The hinge assembly according to claim 4, wherein the hinge (71) has a first shaft hole (72b) passing through the center at one end of a first coupling end (72a) coupled to the support body (48) The first hinge end 72c is partially cut to form a cut space 72d and a stopper 72e is formed at an upper end of the cut space 72d so as to be inclined outward The first hinge piece 72 is formed,
A second coupling end 73c formed by one side of a second hinge end 73b of 'C' shape inserted into the cutout space 72d of the first hinge piece 72 and passing through the center of the second shaft hole 73a, The second hinge piece 73 is formed,
And a hinge shaft (74) inserted and coupled to the first and second shaft holes (72b) and (73a). 5. The apparatus of claim 4, wherein the leaf spring (75) is coupled to the support body (48) and the blade end (49) at either end of an arch end (75a) And the arch coupling end (75b) are integrally formed. [5] The apparatus according to claim 1 or 3, wherein the support body (48) has a first spiral hole (41a) through which a tread bar (10) And a first reinforcing hole (46). (C) to be inserted up to the boundary of the rock layer after forming the perforation hole (H) to the soft layer and the rock layer of the ground, and to form an enlarged foundation by being inserted into the casing (C) The tread bar 10 and the deformed reinforcing bars 60 constitute a coupler 20 for continuously connecting the tread bar 10 and the deformed reinforcing bars 60 formed with the tread bar 10 and the deformed reinforcing bars 60, And a plurality of through holes 32 penetrating through the circumferential ends of the through holes 32 to form a plurality of through holes 32, And is connected to the tip end of the tread bar 10 and the deformed reinforcing bar 60 and passes through the casing C to maintain the inserted state and to pass through the leading end of the casing C It is horizontally protruded by the elastic force, In the micro file line only configure the earth (40) to support the wall to maintain the leading end support and the center of the tread bar 10 and the deformed bar 60,
The linear expansion joint 40 is provided with a first helical groove 41a for engagement with the tip end of the tread bar 10 and a second helical groove 41a for joining the tread bar 10 to the tip end node 61 and the node groove 62 of the deformed reinforcing bar 60, A preform 41 of a circular plate shape in which fixing holes 41b are formed in the periphery where the first reinforcing grooves 45 are formed so as to repeatedly form the coupling grooves 45a and the protrusions 45b are formed,
A plurality of tight fitting openings 43 are formed in the lower portion of the ship fitting 41 and formed with guide holes 43a on the center line moving outward by the elastic members 42,
And a fastening guide 44 which passes through the guide hole 43a in the lower portion of the close contact 43 and then passes through the fastening hole 41b and is fastened to the fastening bolt 41. [ delete The tread band according to claim 8, wherein the tread band (40) comprises a first spiral hole (41c) through which the tread bar (10) And a fixing hole 41b is formed in the periphery where the first reinforcing hole 46 is repeatedly formed so that the first and second reinforcing grooves 45a and 45b are repeatedly inserted into the first reinforcing hole 41. [ In addition,
A plurality of fasteners 43 having a guide hole 43a formed on the center line that is circularly arranged at the lower portion of the fastener coupling 41 and moved outward by the elastic member 42,
A second helical hole 44e and a second coupling groove 45a to which the tread bar 10 and the deformed reinforcing bar 60 respectively passed through the first helical hole 41c and the first reinforcing hole 46 are respectively fastened, A second reinforcing hole 47 is formed at the center of the second reinforcing hole 47 so that the nodule protrusion 45b is repeatedly formed. After passing through the guide hole 43a at the lower portion of the fitting hole 43, And a fastening guide (44) fastened to the fastener assembly (41). The contactor according to claim 8 or 10, wherein the contactor (43) has a fan shape in which an elastic member groove (43b) for inserting and supporting an elastic member (42) is formed on a rear surface (43b ' (43c). ≪ / RTI > 11. The method according to claim 8 or 10, wherein the fastening guide (44) is in contact with the lower surface of the fastening bolt (41) at the center of the upper surface and a support end (44a) Lt; / RTI &
And a coupling rod 44b which is circularly arranged around the support end 44a and passes through the guide hole 43a and the fixing hole 41b in order and is coupled in a nut or rivet manner is protruded. file. The microfiber according to claim 12, wherein the support end (44a) has a plurality of support surfaces (44d) formed with support grooves (44c) into which the elastic members (42) are inserted.

Images