KR101596660B1 - Apparatus and method for removing waste PHC pile of reclaimed land - Google Patents

Abstract

The present invention relates to an apparatus and a method for removing a waste PHC pile buried in land. The present invention aims to provide an apparatus and a method for directly crushing a waste PHC pile buried in land using a double casing, which comprises: an incasing; and, an outcasing, and a crushing screw to tow the crushed remainders onto the land, and to remove them. The apparatus of the present invention comprises: a double casing which is combined with a casing auger of a piece of ground excavating equipment and installed on the circumference of a waste PHC pile buried in land by rotation and which comprises: an incasing; and, an outcasing, which are used for towing crushed remainders; and, a crushing screw combined with the screw auger of the ground excavating equipment and installed on the side of the internal diameter of the incasing which makes the double casing, which has a screw formed on the circumference from the bottom, makes a conical screw hammer bit, into which compressed air is supplied, an air hammer, and a screw pile be combined and rotate and fall with the double casing, lets the conical screw hammer bit crush the buried waste PHC pile, and is used for towing the crushed remainders onto the ground with the incasing.

Description

Technical Field [0001] The present invention relates to an apparatus and method for removing a buried PHC pile of reclaimed land,

More particularly, the present invention relates to an apparatus and a method for removing waste PHC files buried in the ground. More particularly, the present invention relates to an apparatus and method for removing buried PHC piles, , PC steel wire, and spiral reinforcing steel).

Generally, in order to secure safety and prevent settlement during construction or civil engineering works, several piles are embedded or buried in underground rocks to form various foundation structures .

The file construction method is largely a method of constructing a file by directly placing the file on the ground and a method of embedding the file after the excavation of the ground. Ground

The method of directly placing the pile on the ground is a method in which a weight such as a hammer is elevated by using the hydraulic rope or a hydraulic unit, and then lowered, and the upper portion of the pile is hammered into the ground.

In addition, in the method of excavating the ground by digging the ground, a method has been popular recently due to the noise and environmental pollution problem caused when the pile is directly laid. In Fig. 9, the ground is punched to embed the PHC file in the soft ground The ground excavation equipment is shown. A casing coupled to a casing auger and a screw coupled to a screw auger using a ground excavation equipment as shown in the figure are methods for embedding a file in a perforation hole formed by drilling the ground. At this time, the casing is used to prevent collapse of the perforated ground. The ground excavation equipment consists of a screw auger and a casing auger installed on a standing leader in a heavy equipment such as a crane, and a screw and a casing installed on the bottom of the screw auger and casing auger, respectively, do. That is, the casing is configured to be inserted into the ground and the screw rotating in the opposite direction to discharge the gravel inside the casing. Then, the file is buried after drawing out the screw when the required depth is drilled, and when the file is buried, the casing is pulled out and removed to complete the file construction process.

If the file is buried in the ground by the method of placing the file directly on the ground as described above or by embedding the file after the earth excavation, the head of the file exposed on the ground is cut and the head reinforcement is inserted, After cutting to a certain size using a cutter or the like, after the PC steel wire is exposed, the concrete is laid to form the bottom slab, thereby completing the basic reinforcement work.

Recently, the file used in the pile construction method is required to have a deeper penetration amount and large compressive force and bearing capacity in order to secure the safety of the structure due to the construction of the soft ground and the coastal area or the introduction of the seismic design method. Or a PHC file (Pretensioned spun high strength concrete pile). A PHC file is a high-strength concrete file. It is a cylindrical-shaped file that can be used as a finished product in a factory or elsewhere, or can be used in the field in the field.

On the other hand, the PHC file used for the site-based reinforcement works to prevent construction of a new file when the site is dismantled due to reconstruction or redevelopment at the site after a certain period of time or when the site is newly constructed for new construction of the new structure, If left untreated, there is a problem of environmental pollution such as soil pollution.

A common way to remove underground buried PHC files is to excavate the surrounding PHC files to extract the buried files.

However, such a conventional removal method has a problem that the excavation work space may be interfered due to a plurality of buried PHC files embedded in the ground, and the excavation work is repeated for each individual PHC file, so that the air takes a relatively long time, There is a problem that the excavation work is impossible in many cases, and labor and cost are also increased.

As a method for solving the above-mentioned problem, recently, there is a method for removing buried PHC files that can extract and remove a PHC file quickly without excavation.

Korean Patent Registration No. 10-1248393 relates to a method of drawing a concrete pile buried in the ground and a drawing pile, and its object is to provide a concrete pile buried in the ground, The present invention relates to a method of drawing a concrete pile buried in the ground and a pile of the concrete pile buried in the ground so that the pile can be easily pulled out. The center of the discharge pipe having a hollow portion having an inner diameter larger than the outer diameter of the concrete pile is aligned with the center of the concrete pile so that the concrete pile buried in the ground is inserted into the hollow portion of the discharge pipe, ; Connecting a drawer to the head of a concrete pile exposed to the ground; And drawing the concrete pile from the ground by pulling up the draw-out port by connecting the draw-out port with a crane, the concrete pile-in-ground concrete pile drawing method comprising the steps of: And a reinforcing member is integrally formed at a lower end of the discharge pipe, and the drawer is formed into a funnel shape having a wide upper part and a narrower lower part, A fixing pipe which is fitted to the upper portion of the concrete pile by forming a pressing protrusion in close contact with an outer circumferential surface of the concrete pile; And a band having a connecting rope formed on an outer side of the outer surface of the fixing pipe so as to form an annular portion and connecting the annular portion so as to pull out the concrete pile embedded in the ground.

However, in the conventional method of pulling out and removing the concrete pile as described above, a discharge pipe having a hollow portion having an inner diameter larger than the outer diameter of the concrete pile is buried in the ground, and a piercing hole is connected to the head of the concrete pile. Because the filled soil and the cement grout material in the space between the inner diameter and the outer diameter of the concrete pile are consolidated, even if compressed air or water is injected, it is difficult to dissolve the consolidated state to the lower part. There is a problem in that the file can not be easily lifted due to the cut of the interruption part.

Further, the method of removing the concrete pile through the drawing as described above is buried in the pile of the concrete pile at the outer side of the pile to pile up the discharge pipe. However, by using the discharge pipe instead of the pile screw, There is a structural problem that the drain pipe can not be approached to the rock layer where the lower end of the concrete pile is embedded.

That is, in order to provide a solid supporting force when the concrete pile is buried in the ground, a concrete pile is buried to the rock layer to form a concrete pile. However, even though a ring bit is formed under the discharge pipe, It is difficult to penetrate the rock layer only by the discharge pipe of the pipe.

As a result, it is difficult to reach the rock layer even when compressed air or water is injected. Therefore, because of the concrete file that is firmly embedded in the rock layer, There is a structural problem that pulling out by pulling the pulling-out port by using a crane after connecting the pulling-out port to the head of the file may not be performed or may not be smooth.

Therefore, countermeasures are needed to solve these problems.

Korean Registered Patent Publication No. 10-1248393 (March 23, 2013) Korean Registered Patent Publication No. 10-1178277 (Aug. 23, 2012) Korean Patent Registration No. 10-0804812 (Feb. 12, 2008) Korean Patent Registration No. 10-0994374 (2010.11.09.)

SUMMARY OF THE INVENTION [0008] In order to solve the above problems, an object of the present invention is to provide a method for removing waste PHC piles buried in the ground using a double casing and a crushing screw made of ingressing and outcasing, Device and method.

Another object of the present invention is to provide a method of disposing a waste PHC pile having a lower end in a rock layer and a crushing screw provided inside a double casing, further reducing the waste PHC pile in the rock layer section, discharging the waste into the casing by rotation, So that it is possible to remove the residue on the ground along with the upper residue to be removed.

Another object of the present invention is to prevent the collapse of the waste cloth tool remaining after the shredded waste PHC file is lifted by lifting the waste PHC pile using only the ingress of the double casing, The next step is to provide the construction method.

The present invention for achieving the object and eliminating the drawbacks of the prior art is installed around a closed PHC pile buried in the ground by being coupled to a casing auger of a ground excavation equipment, A double casing made of an ingching and an out casing used for lifting the casing;

A conical screw hammer bit, an air hammer and a screw file, which are connected to the screw auger of the ground excavation equipment and are installed on the inner diameter side of the ingot constituting the double casing, And a crushing screw used to crush the waste PHC file in which the conical screw hammer bit is buried while being rotated downward together with the double casing, and to use the crushing residue to be lifted to the ground together with the crushing residue. And a buried waste PHC pile removal device.

In a preferred embodiment, ring bits are formed at the ends of the ingress and outcasing constituting the double casing, respectively, and a plurality of collapsible retention bases operated by the hinges along the ingress lower end inner diameter surface are provided, The poem maintains a tilted upright position towards the lung PHC file, and when the ingestion rises, it can be horizontally unfolded to pick up the residue, caught by the shredded residue.

In a preferred embodiment, the remnant receptacle may be configured to maintain an inclined state toward the closed PHC pile when the casing is lowered by the shape of the angle adjusting stopper provided at one point on the hinge or ingraining inner surface.

In a preferred embodiment, the conical screw hammer bit is formed such that the outer diameter of the conical screw hammer bit increases toward the upper direction from the lower end so that a part of the hollow PHC pile is inserted into the hollow portion of the closed PHC pile, a plurality of screws for crushing and transferring the remnant are formed, A coupling hole having a polygonal structure formed by protruding from the lower end of the air hammer so as to be used for crushing the closed PHC pile by receiving a rotational force, a striking force and compressed air, and a compressed air passage So that the compressed air can be discharged to the residue.

In a preferred embodiment of the present invention, the air hammer is provided with a screw for conveying the remnants, a coupling hole for inserting a rotating force and compressed air is inserted into a lower end of the screw file at an upper end thereof, And a piston is formed in the compressed air passage so that the engagement hole of the conical screw hammer bit is struck by the piston of the compression air passage, .

According to a preferred embodiment of the present invention, the screw file is formed with a screw for conveying the remnants, and the upper end thereof is coupled with the screw auger to receive rotational force and compressed air, and at the lower end, a polygonal insertion groove And a compressed air passage communicating from the upper end to the lower end insertion groove may be formed therein.

In a preferred embodiment, the clearance between the inner diameter of the ingression and the outer diameter of the closed PHC pile and the size of the conical screw hammer bit are such that the maximum diameter of the conical screw hammer bit, on the basis of a PHC file of an inner diameter of 260 mm with a diameter of 400 mm and a thickness of 70 mm, 320 mm to 340 mm larger than 60 to 80 mm is used, and the incising can be made in a size proportional to using an inner diameter of 420 to 430 mm.

According to another aspect of the present invention, there is provided an apparatus for removing waste PHC files embedded in the ground, comprising: a double casing comprising an ingress and an out casing; a crushing screw rotatably moving downward; And removing the removed residues to the ground to remove the waste PHC files.

In a preferred embodiment of the present invention, the waste PHC file removal method is a method in which a crushing screw coupled to a screw augment is placed on a ground exposure site of a buried waste PHC pile, and a double casing consisting of an inching and an outcasing, A first step of aligning the position of the lower PHC pile to the ground;

A second step of crushing the waste PHC pile by blowing compressed air while rotating the crushing screw coupled to the screw auger by inserting the double casing into the ground while rotating and lowering the crushing screw prior to the crushing screw;

After the crushing operation is completed up to the lower end of the closed PHC file, lifting the incineration and crushing screw to raise the waste PHC pile of the inside together to the ground;

A fourth step of pouring the soil to the outcasing remaining in the ground to drain the waste cloth tool;

And then a fifth step of drawing the out casing to the ground.

According to a preferred embodiment, in the second step, in case of a closed PHC pile buried in a rock layer, the conical screw hammer bit of the crushing screw located inside is rotated while the double casing reaching the rock layer is rotated at the corresponding position, And crushing the waste PHC pile and discharging the crushed residue to the upper incising side using a screw formed around the conical screw hammer bit.

In a preferred embodiment, the third step includes lifting the casing auger coupled with the incising to a predetermined height so that a plurality of foldable residue receptacles installed along the inner surface of the lower end of the incising member are hooked on the residue filled in the receptacle, Can be a step of lifting the conical screw hammer bit constituting the lower part of the crushing screw to block the residue to the bottom.

In a preferred embodiment, the second step is such that the air hammer, which constitutes the crushing screw, blows compressed air using the conical screw hammer bit when blowing it through the outlet formed at the lower end or the side of the conical screw hammer bit, And removing the phenomenon and causing it to shatter.

According to the present invention having the above-described characteristics, when the PHC pile used in the ground reinforcing work is removed, the waste PHC pile buried in the ground is directly crushed in the ground using the double casing and the crushing screw, The advantage of being able to remove,

In addition, when the waste PHC pile with the bottom part is removed in the rock layer, the rock layer section where the double casing can not be buried is further lowered by the crushing screw, and after the crushing, the residue is discharged to the incising part constituting the inside of the double casing , It is possible to remove the incineration regardless of the ground conditions in which the waste PHC pile is buried,

In order to prevent collapsing of the waste cloth tool left after the lifting of the closed PHC file, the lifting of the closed PHC file should be lifted only by the ingress of the double casing, It is a useful invention having an advantage of being able to prevent environmental pollution while restoring it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing the entire configuration of a device for removing a PHC file according to an embodiment of the present invention,
2 is an exemplary view showing the operation of the casing according to one embodiment of the present invention,
3 is a view illustrating an example of a dismantling screw constituting an apparatus for removing a spent PHC file according to an embodiment of the present invention,
FIG. 4 is an exemplary view showing a device for removing a closed PHC file according to an embodiment of the present invention installed in a closed PHC file,
FIG. 5 is an exemplary view showing a state in which a lower end portion of a closed PHC file installed on a rock layer is crushed by an apparatus for removing a closed PHC file according to an embodiment of the present invention,
FIG. 6 is an exemplary view showing a device for removing a waste PHC file according to an embodiment of the present invention, after a lower end of a waste PHC file installed in a rock layer is crushed and discharged to an upper casing,
FIG. 7 is an exemplary view showing a state in which a remnant retainer is lifted when a casing constituting an apparatus for removing a closed PHC file according to an embodiment of the present invention is drawn out to the ground,
FIG. 8 is an exemplary view showing a closed cloth tool after removal of a closed PHC file according to an embodiment of the present invention,
9 is an example of a conventional ground excavation equipment for drilling a ground to embed a PHC file on a soft ground.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is a view illustrating an operation of a casing according to an embodiment of the present invention, and FIG. 3 is a view illustrating an operation of the present invention FIG. 8 is a view showing a crushing screw constituting an apparatus for removing a closed PHC file according to an embodiment of the present invention. The rotation direction of the screw shown in the drawings is configured to rotate in one direction for convenience, but it may be formed to rotate in the other direction according to the construction condition.

As shown in the figure, the apparatus for removing waste PHC files buried in the ground according to the present invention is installed around a closed PHC pile (3) buried in the ground by rotation by being coupled to a conventional ground excavation equipment casing auger A double casing 1 used for lifting the remaining residue is provided. The double casing 1 according to the present invention has a double structure composed of an inner casing 11 and an outer casing 12, and each of the upper casing is mounted on one casing auger on the same axis and rotated. The ground excavation equipment provided with the casing auger not shown is a well-known device that is routinely used in civil engineering work or soft ground construction, and thus a detailed description thereof will be omitted. It is sufficient that the ingress 11 and the out casing 12 constituting the double casing 1 are not attached to each other but are slightly spaced from each other.

The crushing screw (2) is installed on the inner diameter side of the ingress (11) of the double casing (1) coupled to the screw auger of the ground excavation equipment. The crushing screw is composed of a conical screw hammer bit 21, an air hammer 22 and a screw pile 23, which are screw-formed around the periphery of the crushing screw and supplied with compressed air, The lower waste PHC pile 3 buried in the ground is crushed by hammering by the screw and the compressed air while descending and the crushed residue is discharged to the upper side of the incising 11 of the double casing 1, 11) to the ground. It is preferable that the maximum diameter of the conical screw hammer bit 21 is larger than the diameter of the main body (cylinder) excluding the screw formed around the air hammer 22 and the screw pile 23.

As described above, the double casing 1 is constituted by an ingress 11 and an outcasing 12, each of which is provided on a casing auger, and a waste PHC file 3, which is buried in the ground while rotating down, It is a device installed around. To this end, ring bits 111 and 121 having the same diameter as the diameter of each casing are formed at the tips (lower ends) of the ingresses 11 and the outcasing 12, respectively. The ring bits 111 and 121 are formed by arranging a plurality of unit bits at regular intervals around the casing auger 11 and the outer casing 12, The friction force with the ground is reduced so that the ingress (11) and the outcasing (12) are smoothly inserted into the ground.

Particularly, the present invention is characterized in that a plurality of collapsible retentate bins 112 are installed along the inner surface of the lower end of the ingress 11 constituting the double casing 1, And is supported by the outer diameter portion of the closed PHC pile (3) to descend in an inclined state. When the opened PHC pile (3) is crushed, In the case of lifting the crushed PHC pile (11), it is spread in the horizontal direction, that is, the inner diameter direction by the hinge action while being caught by the residue of the waste PHC pile (3)

As described above, when a plurality of remotely disposed troughs 112 are unfolded along the inner diameter surface of the ingress 11, it is possible to prevent the debris from being dropped to the lower portion of the ingress 11 when the trough is lifted. At this time, the bottom central portion of the intake 11, which is not contacted by the residue receiver 112, is prevented by the crushing screw 2 from being detached.

The retainer 112 is not vertical so as to have a shape leaning around the closed PHC pile 3 when it is lowered but is kept inclined toward the inner diameter of the closed PHC pile 3, In order to do this, the angle is adjusted so that the PHC pile (3) is kept at a constant angle, not in a vertical state when it is normally or downward.

A hinge 113 for rotating the remained material receptacle 112 or an angle adjusting stopper 114 provided at one point of the inner diameter surface of the ingress 11 so as to maintain the angle of the reminder receptacle 112 toward the inner diameter, When the incising member 11 is lowered, it is maintained in the inclined state toward the inner diameter, and the unfolded state is maintained when the incising member 11 is lifted. The shape of the angle adjusting stopper 114 is a shape formed not to be vertical but to have an inclined angle.

Needless to say, it is needless to say that the stopper 114 for adjusting the angle can be modified into various structures as long as it can maintain the athletic state required by the present invention.

The crushing screw 2 is a device for descending from the upper part to the lower part of the waste PHC pile 3 located in the ingress 11 while being rotated by the screw auger.

For this purpose, the crushing screw 2 is inserted into the hollow part of the hollow PHC pile 3 in the longitudinal direction thereof, and then the lower PHC pile 3 is inserted into the hollow PHC pile 3, A conical screw hammer bit (21) formed with a plurality of screws (211) along the perimeter so as to discharge the crushed and crushed remnants to the upper part, and having a larger outer diameter from the lower end toward the upper direction;

When the conical screw hammer bit 21 is engaged with the upper portion of the conical screw hammer bit 21, the conical screw hammer bit 21 continuously hits the rotary hammer bit 21 to break the soil or the rock, 221) are formed;

And a screw pile 23 which is engaged with an upper portion of the air hammer 22 and transmits a rotational force of the screw auger and is provided with a screw 231 around the pile to transfer the compressed air while discharging the crushed residue.

The screws 211, 221 and 231 are continuously connected to each other at the boundary between adjacent ones of the conical screw hammer bit 21, the air hammer 22 and the screw pile 23 which are stacked vertically and vertically, To be discharged. The screw 211 of the circumference is made of a hard metal or a cemented carbide and the circumference of the screw 211 is sandwiched between the hammer 22 and the screws 231 of the screw pile 23, But the main purpose is to crush the waste PHC pile, and the width of the screw blade is relatively small and a plurality of screws 221 and 231 of the air hammer 22 and the screw pile 23 are formed.

The compressed air passageways 212, 222 and 232 are connected to the conical screw hammer bit 21, the air hammer 22 and the screw paddle 23 so as to be directly connected to each other in the central longitudinal direction, The air hammer 22 is actuated to strike the conical screw hammer bit 21 and the compressed air used for the striking is discharged to the discharge port 213 formed at the lower end or the side of the conical screw hammer bit 21 So that the hammer strikes and rotates smoothly by removing the cushioning phenomenon caused by the residues deposited on the lower part after crushing. The position of the outlet can be formed at various points of the conical screw hammer bit 21, as well as at the points shown if necessary.

An air hammer 22 for direct vertical coupling between the conical screw hammer bit 21, the air hammer 22 and the screw pile 23, and a hexagonal or hexagonal column shaped coupling member 214 And polygon insertion grooves 224 and 233 having a hexagonal or pentagonal groove shape are formed at the lower ends of the air hammer 22 and the screw pile 23 which are respectively engaged with the coupling holes 214 and 223 And the hexagonal or pentagonal column-shaped coupling members 214 and 223 are inserted and joined. Needless to say, the shape of the coupling hole described in the preferred embodiment is not limited to hexagonal or pentagonal columns but may be a polygonal structure in which the latching action can occur so that the rotational force is transmitted.

The compressed air passageways (212, 222) described above are formed in the longitudinal direction at the center of the hexagonal or pentagonal pillar-shaped coupling hole to supply the compressed air to the lower portion.

The air hammer 22 has a cylindrical shape like a screw pile 23 and uses a compressed air to move up and down a piston (not shown) installed in an internal compressed air passage 222 with compressed air, The hexagonal or pentagonal pillar-shaped engagement hole formed at the upper end of the bit 21 is struck to cause the conical screw hammer bit 21 to impact the soil or the rock placed below.

A screw 221 is formed around the air hammer 22. A remnant discharged to the upper side through a plurality of screws formed around the conical screw hammer bit 21 located below the screw 22 is continuously connected to a screw file 23).

However, it is sufficient to use a well-known one for the specific operation principle and detailed structure of the air hammer 22 which continuously applies the blow to the upper end fitting part 214 of the conical screw hammer bit 21 installed at the lower part by using compressed air A detailed description thereof will be omitted. For reference, patents showing the principle and structure of the air hammer are Korean Patent Registration Nos. 10-1178277 and 10-0804812.

On the other hand, in the present invention, a clearance (interval) between the inner diameter of the incising member 11 and the outer diameter of the closed PHC pile 3 is very important. The reason is that when the clearance (interval) is large, the conical screw hammer bit 21 constituting the lower part of the crushing screw 2 rotates and the crushing of the crushed PHC file 3 causes the inner diameter of the crushing 11 and the closed PHC file If the ground soil charged in the gap between the outer diameters of the crushing screw 3 does not overcome the vibrations generated during rotation of the crushing screw 2 and is pushed to the other gap, the incineration of the soil PHC pile 3 (11). When the phenomenon that the closed PHC file 3 is pushed toward the incising 11 occurs in this way, the broken PHC pile 3 is crushed by crushing the broken PHC pile 3 by spins on the hollow top of the closed PHC pile 3, The center of the conical screw hammer bit 21 of the closed PHC pile 3 is displaced from the closed PHC pile 3 so that the pile is not crushed smoothly and incomplete crushing can not be performed until the lower end of the closed PHC pile 3 is broken.

Therefore, a gap (gap) between the inner diameter of the incising 11 and the outer diameter of the closed PHC pile 3, and the size of the conical screw hammer bit 21 which is located at the upper end of the closed PHC pile 3, Is an important factor.

However, the PHC file to be used for landfill and the like has a PHC file having an inner diameter of 260 mm and a diameter D of 400 mm and a thickness of 70 mm, a PHC pile having a diameter D of 500 mm and an inner diameter of 340 mm (Gap) between the inner diameter of the incising element 11 and the outer diameter of the closed PHC pile 3 and the shape of the conical shape of the PHC pile 3 because a plurality of kinds such as a PHC file, a PHC file having a diameter D of 600 mm and a thickness of 90 mm, The diameter of the screw hammer bit 21 is not limited to the same specific value.

The preferred numerical conditions of the present invention will be described below by taking one PHC file standard as an example. Therefore, when the specification of the PHC file is different, the numerical conditions of files of other standards are limited according to the proportional condition according to the numerical values described below.

That is, when a PHC file having an inner diameter of 260 mm and a diameter D of 400 mm and a thickness of 70 mm is embedded, the maximum diameter of the conical screw hammer bit 21 is about 320 mm to 340 mm, which is about 60 to 80 mm larger than the inner diameter, The islands 11 may have an inner diameter of about 420 to 430 mm. In this condition, the broken PHC pile (3) is well broken, and the PC steel wire for vertical reinforcement of the concrete and concrete constituting the closed PHC pile (3) Of concrete aggregate and PC steel wire and wire steel separated therefrom.

The reason for limiting the size of the conical screw hammer bit 21 is that if the PHC file having a diameter D of 400 mm, a thickness of 70 mm and an inside diameter of 260 mm is used as a reference, If it is larger than the above value, it may be crushed too small or may collide with the incising 11 during crushing.

The reason why the diameter of the encasing 11 is limited is that when the PHC file having a diameter of 400 mm, a thickness of 70 mm and an inside diameter of 260 mm is used as a reference, the closed PHC pile (3) The closed PHC file 3 is pushed toward the incising 11 and the opened PHC pile 3 is pushed toward the incising 11 to prevent the smooth rotation of the conical screw hammer bit 21 when the storage space of the residue is compacted. 3) may not occur smoothly.

FIG. 4 is an exemplary view showing an apparatus for removing a closed PHC file according to an embodiment of the present invention, which is installed in a closed PHC file and a fracture screw is located on a head of a closed PHC file, and FIG. FIG. 6 is a view showing an example in which a device for removing a PHC file according to an embodiment of the present invention is installed in a lower part of a closed PHC file installed in a rock layer, FIG. 7 is a view illustrating a state in which the remnant cistern is lifted when the casing constituting the device for removing the PHC files according to the embodiment of the present invention is taken out to the ground, And FIG. 8 is an exemplary view showing a state in which a waste cloth tool is removed after the removal of a closed PHC file according to an embodiment of the present invention.

Hereinafter, a method of removing a waste PHC file using the removal device of the present invention will be described with reference to FIGS. The waste PHC file removing method of the present invention is carried out as follows.

(First step)

First, the ground excavation equipment is placed on the upper side of the removed PHC pile, and then the casing auger and the screw auger of the ground excavation equipments provided on the same axis are respectively provided with an incineration 11 And the upper screw file 23 of the crushing screw 2 and the compressed air line is connected to the upper screw file 23 and then the casing 22 is exposed to the ground, Lower the Auger and Screw Auger.

A screw auger is first operated to descend and the conical screw hammer bit 21 constituting the lower end of the crushing screw 2 is inserted into the hollow portion of the waste PHC pile exposed at a predetermined height on the ground, The ingress 11 constituting the double casing 1 coupled to the lower portion of the casing auger is lowered and the respective ring bits 111 and 121 formed at the ends of the outcasing 12 protrude from the ground And a positioning step of lowering the waste PHC pile so as to be in contact with the ground.

At this time, a plurality of collapsible remnant bins 112 installed along the lower inner diameter surface of the ingress 11 have a tilted state or a leaning state toward the periphery of the exposed PHC pile.

(Second step) Destruction of waste PHC file

When the above-described alignment process is completed, crushing is started when the double casing 1 and the crushing screw 2 are rotated using a casing auger and a screw auger.

The ingresses 11 and the outcases 12 constituting the double casing 1 are rotated along the circumference of the closed PHC pile so that the respective ring bits 111 and 121 provided at the leading ends dig into the ground .

At this time, the double casing 1 precedes the crushing screw 2 so as to guide the crushing screw 2 and prevent the waste PHC pile 3 from being separated from the buried position.

The conical screw hammer bit 21 constituting the lower end of the crushing screw 2 is formed by a plurality of screws 211 formed around the lower casing 2 while descending the double casing 1 and an air hammer 22 ) And the compressed air discharged after the striking are used to crush the lower end portion of the closed PHC pile to make a residue.

The crushing screw is transmitted to the air hammer 22 and the conical screw hammer bit 21 from the screw file 23 directly connected to the upper and lower rotary power supplied from the screw auger.

When the compressed air supplied from the screw auger is supplied to the air hammer 22 through the compressed air passage 232 formed vertically to the center of the screw pile 23, the air hammer 22 is guided by the conical screw The conical screw hammer bit 21 rotates to break the waste PHC file located at the lower side by striking the coupling hole 214 protruding from the upper end of the hammer bit 21.

The compressed air used in the operation of the air hammer 22 is injected through the discharge port 213 formed at the lower end or the side of the conical screw hammer bit 21 to remove the cushioning phenomenon caused by the crushed residue, The rotation is performed.

The remnants generated during the crushing are wire reinforcing bars or ring reinforcing bars for reinforcing the tensile strength of concrete and concrete, and PC reinforcing steel for reinforcing concrete strength in the circumferential direction. As described above, according to a preferred embodiment, When a conical screw hammer bit 21 having a maximum diameter of 320 mm to 340 mm and an incising element 11 having an internal diameter of 420 to 430 mm are used in a closed PHC file 3 having a diameter of 70 mm and an inside diameter of 260 mm, And the PC steel wire and the wire reinforcing steel separated from the steel wire and the steel wire are separated from each other.

Also, in the crushing step, the rotating direction of the crushing screw 11 and the crushing screw 2 are not the same. Due to the rotating direction, some of the remnants are crushed by the screws 211, 221, 11) to the outside of the ground.

(Step 2-1) Removal of waste PHC files in the rock layer

On the other hand, in the case of a closed PHC pile (3) embedded in a soft ground such as a general soil other than a rock layer, the double casing (1) composed of the incising (11) and the outcasing (12) The PHC pile 3 can be positioned up to the lower end of the PHC pile 3. However, when the buried PHC pile 3 is excavated to the rock layer, the upper part of the pile can be reached.

In the case of the closed PHC pile (3) buried in such a rock layer, although it is not explicitly described as a removing method using the conventional pulsed PHC drawing method, there is no method of actually drawing it. The reason for this is that it requires a ground excavation equipment or a crane with a great pulling power after lifting a fixed file firmly attached to the rock layer. Furthermore, if the pulling force is too strong, the waste PHC pile is cut at the boundary between the rock layer and the general soil so that it can remain in the rock layer and be incompletely removed.

However, in the waste PHC file removing method according to the present invention, the double casing 1 that has reached the rock layer is rotated while being rotated in place, and the hitting force using compressed air is applied to the crushing screw 2 to rotate the double casing 1 The conical screw hammer bit 21 goes into the rock layer where it can not reach the crushed rock PHC pile 3 so that the crushed PHC pile 3 continues to be crushed.

When the waste PHC piles (3) buried in the rock layer are all crushed, if the double casing (1) rotating in different directions with the crushing screw (2) is continuously rotated for discharging the residues deposited on the rock layer, Is discharged to the upper part through a screw formed around the conical screw hammer bit (21), and an empty cloth tool is formed in the rock layer space where the closed PHC pile (3) was present, so that the discharge of the residue is completed. Of course, some of the garbage generated by the crushing of the waste PHC pile may be left in the cloth tool, but the pollution problem will hardly occur because it is replaced with good soil later.

(The third stage)

When the crushing operation is completed, the casing auger coupled with the incising is lifted up to a certain height, and a plurality of foldable residue receptacles (12) installed along the inner surface of the lower end of the incising (11) do. At this time, the engagement with the outcasing is lifted in the released state, so that the embedding position of the outcasing is not changed.

When the plurality of remotely disposed tanks 12 are horizontally expanded in the inner diameter direction, the circumferential portion of the conical screw hammer bit 21 is contacted to the central space portion, and the space where the tails are removed from the lower portion of the ingathering 11 is substantially eliminated.

When the casing auger and the screw auger of the ground excavation equipment are raised in such a state, the ingressage 11 and the crushing screw 2 are lifted and the space between the ingressing and crushing screw 2 and the crushing screw 2 And the residue in the bottom surface is lifted to the ground.

On the other hand, when lifting of the incising 11 and the crushing screw 2 as described above, the outcasing 12 performs the lifting work while being kept in the ground.

(Fourth step) Cloth cloth tool plugging step

After the above-mentioned lifting step is completed, the step of supplying high-quality gravel to the interior of the outcasing 12 embedded in the ground is performed. The reason for supplying the good quality soil with the outcasing in the presence of the pulp is that the waste cloth tool is damaged due to lateral pressure of the ground or foreign matter may flow from the upper part, It can be done.

(Step 5) Outcasing drawing step

As described above, the outer casing is filled with high quality gravel and is pulled out from the ground when the plugging operation is completed.

The outcasing can be pulled out by connecting the casing auger to the head of the outcasing and pulling it out, or by pulling the wire on the top of the outcasing by using a lifting crane, or connecting the lifting mechanism to the top of the outcasing, It is acceptable to use any of various methods such as drawing.

There may be some gaps in the outcasing. This gap should be enough for the gravel and soil that are charged in the plugging process of the longevity gardens to fill up naturally, and if necessary, add some additional gravel.

When this step is completed, the process of removing the waste PHC file is completed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(1): double casing (2): crushing screw
(3): Closed PHC file (11): Inching
(12): out casing (21): conical screw hammer bit
(22): air hammer (23): screw file
(111, 121): Ring bit (112): Residual water tray
(113): Hinge (114): Stopper for angle adjustment
(211, 221, 231): screws (212, 222, 232)
(213): Outlets (214, 223): Coupling port
(224, 233): insertion groove

Claims (12)

A dual casing which is installed around a closed PHC pile which is coupled to a casing auger of a ground excavation equipment and is buried in the ground by rotation, and which is used for lifting of the crushed residue;
A conical screw hammer bit, an air hammer and a screw file, which are connected to the screw auger of the ground excavation equipment and are installed on the inner diameter side of the ingot constituting the double casing, And a crushing screw used to crush the waste PHC file in which the conical screw hammer bit is buried while being rotated downward together with the double casing, and to use the crushing residue to be lifted to the ground together with the crushing residue,
The conical screw hammer bit is formed such that an outer diameter of the conical screw hammer bit is increased toward the upper direction from the lower end to insert a part of the hollow PHC pile, and a plurality of screws for crushing and transferring the remnant are formed on the periphery, And a compression air passage is formed in the inside of the upper coupling hole from the upper coupling hole to the lower coupling hole or the side of the compression hole, And the compressed air is discharged.
The method according to claim 1,
A ring bit is formed at the tip of the ingress and outcasing constituting the double casing, and a plurality of folding remotely operated troughs, which are operated by a hinge along the inner surface of the ingressing lower end, are provided, And the waste material is horizontally unfolded by the crushed residue to lift up the residues.
The method of claim 2,
Wherein the remained water receptacle is configured to maintain an upright standing state toward the closed PHC pile when the casing is lowered by the shape of the angle adjusting stopper provided at one point on the inner surface of the hinge or ingraining.
delete The method according to claim 1,
The air hammer is provided with a screw for conveying the remnants and has an upper end formed with a coupling hole to be inserted into the lower end of the screw pile for receiving rotational force and compressed air and a polygonal insert And a piston is formed inside the compressed air passage so as to strik the coupling hole of the conical screw hammer bit. [0028] According to another aspect of the present invention, Underground buried waste PHC file removal device.
The method according to claim 1,
The screw pile is formed with a screw for conveying the remnants and the upper end is connected with the screw auger to receive rotational force and compressed air. The lower end of the screw pile is formed with a polygonal insertion groove into which a coupling hole of an air hammer is inserted. And a compressed air passage communicating from the upper end to the lower end insertion groove is formed.
The method according to claim 1,
The maximum diameter of the conical screw hammer bit is 60 to 80 mm larger than the inner diameter based on a PHC file having an inner diameter of 260 mm and a diameter of 400 mm and a thickness of 70 mm, the gap between the inner diameter of the ingaking and the outer diameter of the closed PHC pile, 320 mm to 340 mm, and the incising is made in a size proportional to using an inner diameter of 420 to 430 mm.
Claims [1], [2], [3], [5], [6] and [7] to provide a double casing comprising an ingress and an outcasing and a decommissioning PHC file And then removing the crushed residue from the ground to remove the crushed residue from the ground.
The method of claim 8,
In the method of removing the waste PHC file, the crushing screw coupled to the screw auger is placed on the exposed portion of the buried waste PHC pile, and the double casing composed of the incising and outcasing combined with the casing auger is wound around the waste PHC pile A first step of wrapping and aligning the position on the ground;
A second step of crushing the waste PHC pile by blowing compressed air while rotating the crushing screw coupled to the screw auger by inserting the double casing into the ground while rotating and lowering the crushing screw prior to the crushing screw;
After the crushing operation is completed up to the lower end of the closed PHC file, lifting the incineration and crushing screw to raise the waste PHC pile of the inside together to the ground;
A fourth step of pouring the soil to the outcasing remaining in the ground to drain the waste cloth tool;
And a fifth step of drawing the out casing to the ground.
The method of claim 9,
In the second step, in the case of a closed PHC pile buried in the rock layer, the conical screw hammer bit of the crushing screw located inside is rotated while the double casing reaching the rock layer is rotated at the corresponding position, and the crushing force using the compressed air is applied And a second step of crushing the waste PHC pile and discharging the crushed residue to the upper crushing side using a screw formed around the conical screw hammer bit. Removal method.
The method of claim 9,
In the third step, the casing auger combined with the ingressing is lifted up to a certain height so that a plurality of foldable remnant basins installed along the lower inner diameter surface of the ingressing can be hooked on the remainder filled in the inside, Is a step of lifting the cone-shaped screw hammer bit constituting the lower part of the crushing screw to prevent the residue from falling down.
The method of claim 9,
In the second step, compressed air using the air hammer which constitutes the crushing screw blows the cone-shaped screw hammer bit through the outlet formed at the lower end or the side of the cone-shaped screw hammer bit to remove the cushioning phenomenon by the crushed residue, And a step of removing the buried PHC files buried underground.

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