KR101497675B1 - A tension type removing nail and method for reinforcing the ground - Google Patents

Abstract

The present invention relates to a tension type removing nail and a construction method thereof which reinforces the ground using an anchoring force by mechanical friction and rigidity by grouting and removes a nail rod as well as being capable of being closely constructed by reducing a punch. The tension type removing nail comprises: an anchoring head (10) having a slope portion (11) on a side toward the rear; the removing nail rod (20) where a front end portion is connected to be separated to the anchoring head; a support pipe (30) where the front end portion is connected to the anchoring head by surrounding the removing nail rod; a packer installed to make the support pipe slid on the circumference portion of the support pipe, and where the circumference portion is fixedly pressed on a wall side of a nail groove of the underground through extension; and two or more settlement pieces (40) anchored on the ground near the nail groove.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a nail for removing stretch type nails,

The present invention relates to a nail and a ground reinforcement method, and more particularly, to a nail and a ground reinforcement method, and more particularly, to a nail and a ground reinforcement method which firmly reinforce a hypothetical ground and a ground through a fixing force by a mechanical frictional force and a frictional rigidity by a grouting, And a method of constructing the same.

Generally, a nail method is a method in which a nail hole having a certain depth is pierced and a nail is installed in a perforated nail hole to prevent collapsing of the ground surface and the surrounding ground at work sites such as various excavation sites, the grouting around the excavation site is prevented by the grouting operation.

Thus, in the conventional nail application method, the spacer is connected to the nail at regular intervals so that the nail is positioned at the center of the nail hole, the nail is inserted into the nail hole, and the grouting hose is inserted in parallel with the nail, A mortar or other grout material is injected into the nail ball itself to produce a concrete pile having nail core.

Since the nail according to the prior art relies solely on the frictional force with the grout material, there is a drawback that the strength of the ground reinforcement is weak.

However, in the conventional nail method, even after the construction process of the construction site is completed, the concrete file having the nail as the core remains firmly in the ground, so that when the other structure is to be constructed adjacent to the completed structure, There is a problem in that the foundation work of the ground becomes difficult due to the file being an obstacle in the ground excavation work.

In order to solve such a problem, a removable nail has been proposed.

Removal type nail according to the prior art is merely to remove nail seal reinforcing bar and is not a technique for securing fixing force by mechanical frictional force. Therefore, the strength of the ground reinforcement is very small and therefore the number of nail bones is inevitably increased. And air is lengthened.

In addition, since it depends on the frictional force by grouting, there is also a problem that the length of the mill is long, and thus there is a problem that frequent complaints occur due to invasion of surrounding private land.

Patent No. 10-1052728 Patent No. 10-0934274

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a method and apparatus for reinforcing a cage and a ground through a fixing force by mechanical frictional force and a rigidity by grouting, It is intended to provide a removal nail and this construction method.

A pulling type removing nail according to the present invention comprises: a fixing head having a slanting portion formed on a rearward facing surface; A removable nail rod having a distal end detachably connected to the fixing head; A support tube surrounding the removal nail rod and having a distal end connected to the fixation head; The support pipe is slidably installed on the periphery of the support pipe, and the periphery thereof is pressed and fixed to the wall surface of the nail hole in the ground through the extension, A support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the support tube, Wherein the fixing member comprises two or more fixing members to be fixed.

A pulling type removing nail according to the present invention comprises: a fixing head having a slanting portion formed on a rearward facing surface; A removable nail rod having a distal end detachably connected to the fixing head; A support tube surrounding the removal nail rod and having a distal end connected to the fixation head; A squeezing protector fixed to the periphery of the support tube and having a periphery thereof being pressed and fixed to a wall surface of a nail hole in the ground; A support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the support tube, Wherein the fixing member comprises two or more fixing members to be fixed.

According to the pull-off type nail and the construction method of the present invention, the nail rod is used to expand the fixing member to secure a large fixing force by the mechanical frictional force by the fixing member, and the high- It is possible to effectively stabilize the hypotenuse and the slope and to secure a large fixing force by the wedge type fixing unit to reduce the length of the silk factory and to remove the nail rods, And as a result, the occurrence of complaints can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a pull-type removing nail according to Example 1 of the present invention; FIG.
Fig. 2 is a view showing a construction process of a pull-off type nail according to Example 1 of the present invention. Fig.
3 is a perspective view illustrating a fixing head and a fixing member, which are applied to a pull-type removing nail according to Embodiment 1 of the present invention, in a separated state.
Fig. 4 is another example of a supporting tube applied to a pull-type removing nail according to the first embodiment of the present invention; Fig.
Fig. 5 is a view showing a construction process of a pull-type removing nail according to a second embodiment of the present invention. Fig.

≪ Example 1 >

1 and 2, the pull-type eliminating nail 100 according to the present embodiment includes a fixing head 10, a removal nail rod 20 connected to the fixing head 10, A support pipe 30 into which a rod 20 is inserted and whose front end portion is connected to the fixing head 10, a fixing member 40 that is extendably mounted on a periphery of the support pipe 30, And a packer 50 which is installed on the nail hole 1 in the ground and fixes the fixture 40 on the ground around the nail hole 1 so that the ground To reinforce.

The fixing head 10 is moved to the ground side together with the removal type nail bar 20 when the removal nail bar 20 is pulled to extend the fixing member 40 so that the fixing nail bar 20 is fixed to the ground around the nail hole 1 And an inclined portion 11 is formed at the periphery thereof. Although the fixation head 10 is shown in the drawing as having a pointed protrusion at the front, it is selectively applicable.

As shown in FIG. 3, the fixing head 10 is formed with the guide groove 12 so that the fixture 40 moves only in the optimum expanding direction.

The fixation head 10 has a groove or a hole into which the removal nail bar 20 and the support pipe 30 are inserted. The screw engagement portions 13 and 14 are formed. The first screw coupling portion 13 is a portion where the removal nail rod 20 is screwed and the second screw coupling portion 14 is a portion where the support tube 30 is screwed, (13, 14) are stepped to different inner diameters.

For example, the removable nail bar 20 is screwed and removed, and the support tube 30 is not permanently removed, but is permanently applied. Therefore, the removal nail bar 20 is not limited to being screwed, and other fixing methods are possible.

The removal type nail rods 20 can be made of various materials such as threaded reinforcing bars, deformed reinforcing bars formed by threading of threads at the distal end, and steel rods formed with threads at the periphery, (Not shown).

The removal type nail rods 20 are connected to each other through two or more couplers depending on the depth of the nail holes 1.

The support pipe 30 is for supporting the fusing member 40 or the like and may be, for example, a PVC pipe. The support tube (30) defines the space of the grouting.

The tip of the support tube 30 is screwed to the second screw coupling portion 14 of the fixing head 10, and a screw thread is formed at the periphery of the tip portion thereof.

As shown in FIG. 4, one or more spacers 31 are provided on the periphery of the support pipe 30 so that the support pipe 30 is grouted between the support pipe 30 and the nail hole 1, . The spacer 31 may be formed in any shape protruding from the periphery of the support pipe 30, that is, not limited to the ring shape shown in the drawing, and may be a fill hole filled with grout material.

The spacer 31 serves as a center holding member for allowing the support tube 30 to be disposed at the center of the nail hole 1. [ Of course, for this purpose, the spacer 31 is of the same size as the inner diameter of the nail hole 1 and a hole for grouting should be constituted.

Since the support tube 30 is fixed to the fixing head 10, the fixing member 40 maintains the extended fixing state even after the removal nail stick 20 is removed.

The support tube (30) is used by joining two or more tubes according to the depth of the nail hole (1).

The fixing member 40 has an inclined portion 41 formed on the inner peripheral surface thereof and is used when two or more are roundly mounted on the peripheral portion of the support tube 30 and the inclined portion 41 is used as an inclined portion 11).

The fixing member 40 includes a guide protrusion 42 which is slidably mounted on the guide groove 12 of the fixing head 10 on the inner circumferential surface. The guide protrusions 42 and the guide grooves 12 are configured to have a size that takes into consideration the extension distance of the fusing member 40. [

In addition, only one side of the fixing member 40 is fixed to the fixing head 10, but it is possible to expand the fixing member 40. However, in order to uniformly fix all the parts of the fixing member 40 to the ground, (60) may be applied.

The fixing member 40 may be provided with a projection-type spike on its outer circumferential surface to increase the fixing force with respect to the ground.

At least two fusing members 40 are installed and maintained in the installed state through the band 44 so as not to be separated from each other at the time of initial installation. Of course, the band 44 is made of a structure and a material that breaks so that the fusing members 40 are stretched when the removal nail bar 20 is pulled.

The extension guide block 60 is a three-dimensional block having a circular shape with a hole into which the support pipe 30 is fitted, and an inclined portion 61 is formed at the periphery. Therefore, the fixing member 40 has an inclined portion 43 which is supported by the inclined portion 61 of the extension guide block 60 on the inner peripheral surface.

The extension guide block 60 is installed in front of the packer 50 and does not move toward the ground by the packer 50. [

A guide groove is formed in the extension guide block 60 and a guide projection slidably connected to the guide groove of the extension guide block 60 is formed in the fixture 40. [

Since the support tube 30 is moved toward the ground together with the fixing head 10 when the removal nail bar 20 is pulled in this embodiment, the extension guide block 60 is moved in the direction in which the support tube 30 It is combined so as not to interfere with the movement and a bearing or the like may be constituted.

The packer 50 is a flexible pouch which is inflated by a fluid (cement milk or the like) injected into the inside and is pressed and fixed to the inner wall surface of the nail hole 1, So that the block 60 is prevented from moving to the ground side, thereby allowing the fixture 40 to move only in the expanding direction.

The packer 50 is slidably mounted on the periphery of the support pipe 30 so as to prevent the support pipe 30 from moving to the ground side when the removal nail bar 20 is pulled, ) May be configured.

Further, a protruding spike (concavo-convex structure) may be formed on the circumferential surface so that the packer 50 is more firmly fixed to the nail hole 1.

The construction method of the pull-type removing nail according to the present embodiment will be described with reference to FIG.

(S10) Perforation of nail ball.

A tension-type removing nail 100 of the present embodiment is installed for reinforcing the ground (rock, etc.), and the nail hole 1 is first drilled in the ground.

The nail holes 1 are formed in the ground by using a known punching machine and the nail holes 1 are formed by the know-how so that the fixation pieces 40 of the pull-type removal nail 100 are firmly fixed to the ground through expansion. ). The diameter of the nail hole (1) varies depending on the characteristics of the ground, so it is not limited to a specific numerical value.

(S20) Insertion of a tensile-type removal nail (100).

The pull-type removing nail 100 is inserted into the nail hole 1.

The pull-type eliminating nail 100 keeps the unfixed state of the fixing pieces 40 by the band 44, so that it is inserted quickly and smoothly without interference when the nail ball 1 is inserted into the nail hole 1. At this time, the leading end of the fixing head 10 will be supported by the nail hole 1.

(S30) Packer expansion.

When the cement milk is injected into the packer 50 through the milk injecting tube 51, the packer 50 in the contracted state expands, (50) is press-fitted to the inner wall surface of the nail hole (1). The packer 50 prevents the fixing member 40 and the like from moving in the direction of the ground which is the pulling direction of the removal type nail bar 20 when the removal nail bar 20 is pulled, It must be firmly pressed and fixed. When the injection of the cement milk is completed, the milk injection tube 51 can be removed from the packer 50.

(S40) Removable Nail Rod Seal.

When the removal type nail rods 20 are pulled to the ground side on the ground using a tensioner, the fixing head 10 and the support pipe 30 move to the ground side together with the removal type nail rods 20.

At this time, since the packer 50 and the extension guide block 60 maintain the mounting position, the distance between the fixing head 10 and the extension guide block 60 becomes narrow and the fixing member 40 is inclined at the inclined portions 41 and 43 ) 11,61 toward the wall surface of the nail hole 1 (the band 44 is broken) and fixed on the ground.

At this time, since the fixing member 40 moves only in the expanding direction through the guide protrusion 42, a large fixing force can be obtained.

(S50) grouting.

Grout material is injected into the inside of the nail hole 1, that is, the outside of the support pipe 30 to grout.

The leading end injection portion of the grout injection tube is inserted into the interior of the nail hole 1, for example, the back of the packer 50 and then the grout material is injected. Therefore, the fixing force due to the mechanical frictional force of the fusing portion 40, It strengthens the ground with its own strength.

When the spacer 31 is applied to the support tube 30, since the spacer 31 is inserted into the grouting body, the support tube 30 is not pulled out to the ground, so that more rigid ground reinforcement is achieved.

One or more packers may be provided behind the fixing unit, and the fixing force may be further increased by pressure grouting through the packers.

(S60) Removal of removed nail rods.

After the fixing and grouting of the fixing member 40 is completed, the removal type nail bar 20 is removed, and the removal method is as follows.

When the removal type nail stick 20 is rotated in the release direction on the ground, the removal type nail stick 20 is separated from the fixing head 10 and is then drawn out to the outside of the support tube 30, that is,

When the fixing head 10 rotates in the same direction to turn the removing nail rods 20 in order to remove the removing nail rods 20, the removing nail rods 20 can not be removed, The fixing nail rods 20 are removed and the fixing head 10 is removed from the fixing nail rods 20 because the fixing nails 40 are not rotated to the ground through the guide grooves 12, And is held by the support tube (30).

As a result, the fixing unit by the fixing member 40 is applied.

The order of the grouting process (S50) and the removing nail bar removing process (S60) may be reversed.

≪ Example 2 >

5, the pull-type eliminating nail 100 according to the present embodiment includes a fixing head 10 having an inclined portion 11, a fixing head 10 having a distal end removably connected to the fixing head 10, A support tube 30 which surrounds the nail bar 20 and the removal nail rods 20 and has a distal end connected to the fixing head 10 and a packing chamber 30 which is provided at the periphery of the support tube 30, The fixing nail rods 20 are extended when the nail rods 20 are pulled out and fixed to the ground so that the fixing nail rods 20 are extended and the extension guide blocks 60 for leading to the expansion of the fixing nails 40 are the same as those of Embodiment 1 , The packer 50 is fixed to the support tube 30 and the fixing head 10 is slidably connected to the support tube 30.

The fixation head 10 has a hole into which the support tube 30 is inserted without being screwed, and the hole has a length that is longer than the movement distance of the fixation head 10.

Since the fixing head 10 must not move in order to maintain the extended fixation state even after removing the removal nail rods 20, The fixing head 10 should be fixed by grouting the space.

That is, according to the present embodiment, the removal nail bar 20 is inserted into the nail hole 1 in the same manner as in Embodiment 1, and when the packer 50 is expanded and fixed to the nail hole 1, The head 10 moves on the support tube 30 to the ground side so that the fusing member 40 is expanded and fixed to the ground between the stationary extension block 60 and the moving fixing head 10.

1: Nail ball, 10: Fixing head
11, 41, 63, 61: an inclined portion, 12:
20: Removable nail rod, 30: Support tube
40: fixing member, 41:
42: guide projection, 50: packer
60: extension guide block,

Claims (8)

A fixing head (10) having an inclined portion (11) formed on a rearward facing surface and formed with first and second screw portions (13, 14) so as to be stepped;
A removable nail rod 20 screwed on the first screw portion 13 of the fixing head so as to be detachable;
A support tube 30 surrounding the removal nail rod and having a tip portion connected to the second screw portion 14 of the fixation head;
Wherein the support pipe is slidably installed on the periphery of the support pipe and the periphery of the support pipe is pressed and fixed to the wall surface of the nail hole through the extension;
A support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the support tube, Two or more fusing members (40) to be fixed;
An extension that is mounted on the periphery of the support tube so that the support tube slides while being interposed between the slide prevention member and the fixation member and has an inclined portion formed on a surface facing the fixture member to induce expansion of the fixation member through the inclined portion, Is inserted into the nail hole (1) in the ground including the guide block (60) and fixed to the ground by the fixing member,
The nail bar is separated from the fixing head after the fixing member is fixed, and the nail bar is separated from the fixing head after the fixing member is fixed, Wherein the support is removed from the support tube to the ground. delete delete The fixing device according to claim 1, wherein the fixing head includes a guide groove (12) formed in an inclined portion, the fixing member including a guide protrusion (42) extending by a guide protrusion moving along the guide groove, Wherein the fixing head does not rotate with the removal nail rod upon removal of the removal nail rod. The pull-type removal nail of claim 1, wherein the support tube comprises at least one spacer (31) at the periphery thereof. A fixing head (10) having an inclined portion (11) formed on a surface facing the rear side and a first screw portion (13) and a hole formed in a stepped manner;
A removable nail rod 20 screwed on the first screw portion 13 of the fixing head so as to be detachable;
A support tube (30) surrounding the removal nail rod and having a tip portion movably connected to a hole of the fixation head;
A squeezing protector fixed to the periphery of the support tube and having a periphery thereof being pressed and fixed to a wall surface of a nail hole in the ground;
A support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the nail, a support tube for supporting the support tube, Wherein the removal nail rod is detached from the fixing head after the fixation member is fixed by being inserted into a nail hole (1) in the ground including two or more fixation members (40) to be fixed and fixed to the ground by the fixation member Wherein the support is removed from the support tube to the ground. A method of constructing a pull-type removal nail according to claim 1 or 6,
A first step of perforating the nail holes 1 in the ground;
A second step of inserting the pull-type removal nail 100 into the nail hole drilled through the first step;
A third step of expanding the nailing chamber of the pull-type removing nail after the second step so that the periphery of the nailing chamber is pressed and fixed to the wall surface of the nail hole;
The fourth step of pulling the removal type nail bar of the pull-type removal nail through the third step to move the fixing head to the ground side so that the fixing member 40 is extended toward the wall surface of the nail hole to be fixed Wow;
A fifth step of grouting between the nail ball and the support tube;
And removing the removed nail bar from the fixing head to the outside of the support tube (30) of the pull-type removal nail,
And the second step includes inserting the removed nail rod of the pull-type removal nail into the first screw thread of the fixing head by screwing and inserting the same, and the fifth step of rotating the removal nail rod Is removed from the fixing head, and then drawn out to the outside of the support tube to remove the nail. delete

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