KR20120096156A

KR20120096156A - Complex pile and the construction method using it and the mold for manufacturing a shear reinforcement part

Info

Publication number: KR20120096156A
Application number: KR1020110015382A
Authority: KR
Inventors: 최영덕
Original assignee: (주) 포유엔지니어링; 최영덕
Priority date: 2011-02-22
Filing date: 2011-02-22
Publication date: 2012-08-30

Abstract

PURPOSE: A composite pile, a manufacturing method thereof and a manufacturing mold for a shear reinforcing part of the composite pile are provided to construct a PHC pile without damages. CONSTITUTION: A composite pile comprises a PHC pile(100) and a shear reinforcing unit(200). The PHC pile comprises a first hollow part(110) and a plurality of steel wires. The first hollow part is vertically extended. The steel wires are embedded at constant intervals. The shear reinforcing unit is fixed to one end of the PHC pile, and comprises a larger diameter than the diameter of PHC pile. The shear reinforcing unit a second hollow part connected to the first hollow part at the center.

Description

COMPLETE PILE AND THE CONSTRUCTION METHOD USING IT AND THE MOLD FOR MANUFACTURING A SHEAR REINFORCEMENT PART}

The present invention relates to a compound file.

In general, when constructing a building or a structure, a foundation work is performed to reinforce the ground to support the structure according to the condition of the ground or the load of the structure.

For this purpose, PHC piles (Pretensioned spun High strength Concrete Piles) are widely used, and these PHC piles have the advantages of better axial load bearing capacity, stronger impact, and greater flexural strength than PC piles.

1 is an exploded perspective view illustrating a structure of a conventional composite pile in which a steel pipe is coupled to an upper side of a seat plate provided at the head of the P.C pile, and FIG. 2 is a state in which the steel pipe is placed on the seat plate but not joined by welding. Fig. 3 is a cutaway perspective view showing the cut structure, and Fig. 3 is a cross-sectional view showing the structure of the cross section of Fig. 2.

As shown in these figures, the conventional composite pile consists of a PHC pile 10 and a steel pipe 20 welded to the upper portion of the PHC pile 10.

PHC pile 10 is made of a hollow concrete pile, the steel wire 13 is embedded vertically, the head is provided with a seat plate 11 made of a disk-shaped steel formed hollow, integrally, the steel wire 13 ) Is located in the fixing groove 14 formed in the seat plate (11).

Steel pipe 20 is placed on the upper surface of the seat plate 11, the outer surface of the joint surface of the steel pipe 20 and the seat plate 11 is welded to the steel pipe 20 is coupled to the seat plate 11, PHC pile 10 and Steel pipe 20 is made of a composite pile integrally.

And, in welding the lower end of the steel pipe 20 and the seat plate 11, the upper surface outer edge of the seat plate 11 is formed with a recess 15 so that the welding line can be formed, the lower outer edge of the steel pipe 20 The chamfer 21 is formed.

By the way, in such a conventional composite pile, the diameter of the steel pipe 20 provided on the upper portion of the PHC pile 10 should be provided so as not to be at least larger than the diameter of the PHC pile 10 is limited in diameter of the steel pipe 20 There is a problem in that the case does not have the required shear force or bending strength.

In addition, since the price of the steel pipe 20 is more expensive than the PHC pile in the state, there is a problem in that the cost required for the production of the composite pile is increased and economic efficiency is lowered.

In addition, due to the difference in diameter between the steel pipe 20 and the PHC pile 10, the area in contact with each other becomes smaller, it becomes difficult to secure the thickness of the weld neck of a sufficient size, accordingly between the seat plate 11 and the steel pipe 20 It is not possible to have a sufficient bond strength and, in the end, a firm integration of the PHC pile 10 and the steel pipe 20 becomes difficult.

In addition, since the steel pipe 20 having a thickness relatively thinner than the thickness of the PHC pile 10 is placed on the PHC pile 10, a local pressure is generated in the PHC pile 10 or a stress imbalance occurs. There is also a risk that the upper portion of 10 is broken.

The object of the present invention devised in view of the above point is to increase the flexural strength required for the foundation work and to reduce the cost of manufacturing to improve the economics and at the same time without direct damage to the P-C pile construction To provide a possible composite file.

The composite pile for achieving the object of the present invention as described above, P-C file is formed through the first hollow portion extending in the height direction and a plurality of steel wires are embedded at regular intervals along the circumferential direction; And a shear reinforcing part fixedly coupled to one end of the PH file, and having a second hollow part communicating with the first hollow part at a center thereof, the shear reinforcing part being formed to have a larger diameter than the PH file. It is done.

Here, the side of the one end of the shear reinforcing portion fixed to the one end of the P C file may be formed to be inclined.

The shear reinforcing part may have a plurality of steel wires disposed to be spaced apart by a predetermined interval along the circumferential direction of the shear reinforcing part.

In addition, a plurality of reinforcing bars disposed on the concentric circle with the steel wire may be further provided outside the steel wire embedded in the shear reinforcing part.

In addition, the reinforcing bar is formed along the longitudinal direction of the shear reinforcing portion and a plurality of first reinforcing bars arranged in an annular spaced apart a predetermined interval, and the first wound in a spiral shape on the outer peripheral surface of the plurality of annular first reinforcing bars It can be composed of two rebars.

In addition, a front end extension portion formed to have a diameter larger than the diameter of the PC at a predetermined height may be provided on a circumferential side end circumferential surface of the PPC end to which the shear reinforcement portion is coupled.

In addition, the circumferential surface of the shear reinforcing portion may be provided with a carbon fiber sheet formed to surround the entire circumferential surface.

In addition, the carbon fiber sheet may be attached by roller pressing or impregnation after applying a primer or epoxy to the circumferential surface of the shear reinforcement.

And, an outer circumferential surface of both ends of the carbon fiber sheet provided on the circumferential surface of the shear reinforcing portion may be provided with an annular reinforcement band.

Shear reinforcing part manufacturing mold for achieving another object of the present invention as described above, the tubular main surface forming housing having a predetermined internal space, a constant diameter and the both ends are formed; An inclined portion which is disposed at a plurality of locations in the main surface forming housing in a longitudinal direction of the main surface forming housing, the diameter gradually decreases, and the hollow is formed, and extends to a predetermined length at an end of the inclined portion; An end forming housing having a smaller diameter and consisting of an annular extension formed with a hollow; A connection plate provided at an end of the end forming housing to shield an end of the end forming housing to the outside; It is characterized in that it comprises a shielding plate provided at both ends of the opening of the main surface forming housing to shield the internal space from the outside.

Here, the end forming housing may be provided in a pair in which the extension part and the connecting plate are in contact with each other in a state in which they are disposed in opposite directions, and may be disposed at a plurality of locations of the main surface forming housing.

The end forming housing may be assembled in the main surface forming housing to be movable along the longitudinal direction of the main surface forming housing.

The construction method of the composite pile to achieve another object of the present invention as described above, the first step of drilling the ground having a diameter that can be inserted into the P. C pile using a boring device; Inserting a P.C file into the perforated ground; A third step of directly hitting the shear reinforcing part protruding to the outside; .

Here, the step of injecting milk into the perforated ground may be further included between the first step and the second step.

As described above, the composite pile according to the present invention may be provided with a separate shear reinforcing part formed of concrete material on the upper side of the P C pile to increase the bending strength required for the foundation construction.

In addition, by providing a pawn reinforcement part of the concrete material that can replace the steel pipe used in the conventional composite pile can reduce the construction cost because the basic construction can be constructed at a low cost.

In addition, the shear reinforcement portion is formed of the same concrete material as the PH pile, and the conventional steel pipe having a contact area larger than the area in contact with the PH pile, without directly damaging the end of the P pile, There is an effect that the construction of the foundation can be easily installed.

1 is an exploded perspective view illustrating a structure of a conventional composite pile in which a steel pipe is coupled to an upper side of a seat plate provided at the head of a P.C. file;
Figure 2 is a cutaway perspective view showing a cut in the structure of the steel pipe is placed on the seat plate but not joined by welding,
3 is a cross-sectional view showing the structure of the cross section of FIG.
4 is a perspective view illustrating a structure in which a PH file and a shear reinforcement part are separated from a composite file according to an embodiment of the present invention;
5 is a cross-sectional view showing the structure of the longitudinal section of FIG.
6 is a cross-sectional view showing the structure of a composite file according to another embodiment of the present invention,
7 is a cross-sectional view showing the structure of the cross-section of the shear reinforcement portion according to the present invention,
8 is a perspective view illustrating a structure of reinforcing bars embedded in the shear reinforcing part of FIG. 7;
9 is a cross-sectional view showing the structure of a composite file according to another embodiment of the present invention,
10 is a cross-sectional view showing the structure of a mold for manufacturing the shear reinforcement of the composite pile according to an embodiment of the present invention,
FIG. 11 is a perspective view illustrating a structure of an end forming housing provided in the mold of FIG. 9;
12 to 14 is a plan view showing a method for constructing a composite pile in the ground according to an embodiment of the present invention.

Hereinafter, the composite file according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view illustrating a structure in which a P C file and a shear reinforcing part are separated in a composite file according to an embodiment of the present invention, FIG. 5 is a cross-sectional view illustrating a structure of a longitudinal section of FIG. 4, and FIG. 6 is an embodiment of the present invention. Figure 7 is a cross-sectional view showing the structure of a composite pile according to another embodiment of the present invention, Figure 7 is a cross-sectional view showing the structure of the cross section of the shear reinforcement portion according to the present invention, Figure 8 is a reinforcing bar embedded in the shear reinforcement of Figure 7 9 is a cross-sectional view showing the structure of a composite pile according to another embodiment of the present invention, Figure 10 is a mold for manufacturing a shear reinforcement of the composite pile according to an embodiment of the present invention 11 is a perspective view illustrating a structure of an end forming housing provided in the mold of FIG. 9, and FIGS. 12 to 14 are constructed of a composite pile according to an embodiment of the present invention. doing Is a plan view illustrating the method.

As shown in these figures, the composite pile according to an embodiment of the present invention, the first hollow portion 110 extending in the height direction is formed through the plurality of steel wires 120 in the circumferential direction at regular intervals The HS file 100 and the second hollow portion 210 fixedly coupled to one end of the HS file 100 and communicating with the first hollow portion 110 at the center thereof are formed therethrough. It is configured to include a shear reinforcing portion 200 is formed to have a larger diameter than the pile (100).

PA file 100 is a member that is inserted into the ground for the foundation work of the ground, the depth and length of the insertion is applied to the ground in accordance with the state of the ground variously applied, the bottom surface is inserted into the ground and the ground It is in contact with the tip support force is generated at the same time the side is in contact with the ground to generate a friction force serves to support the building placed on the upper side safely.

The first hollow part 110 extending in the longitudinal direction is formed in the center of the P.C pile 100, and a plurality of steel wires 120 are disposed in an annular shape so as to be spaced apart by a predetermined distance in the circumferential direction thereof. It is inherent.

The upper surface of the P. C pile 100 is provided with a seat plate 140 made of a disk-shaped steel with a hollow, the upper end of the steel wire 120 is located in the fixing groove 141 formed in the seat plate 140 The seat plate 140 is fixedly coupled to the top surface of the PHC file 100.

The shear reinforcement part 200 is placed on the upper surface of the seat plate 140, the outer surface of the shear reinforcement part 200 and the joint surface of the seat plate 140 is welded, and the shear reinforcement part 200 is coupled to the seat plate 140, The composite file is manufactured by combining the PHC file 100 and the shear reinforcement part 200.

Here, in welding the lower end of the shear reinforcing part 200 and the seat plate 140, a concave portion 142 is formed at the outer edge of the upper surface of the seat plate 140 so that a weld line may be formed.

As shown in FIG. 6, the front end circumferential surface of the P-C pile end to which the shear reinforcement part 200 is coupled, that is, the end circumferential surface where the ground and its bottom surface are in contact with each other, is designed to improve the tip support force. The tip extension part 150 may be provided to have a diameter larger than the diameter of the PPC file 100 to extend the width of the end surface of the PPC file 100 in contact with the ground.

Meanwhile, the shear reinforcement part 200 is a member coupled to the upper end of the PH pile 100 by welding, and the second hollow part 210 communicating with the first hollow part 110 at the center thereof is along the longitudinal direction. The steel plate 230 is formed to extend through, the bottom plate 220 having the same shape as the seat plate 140 coupled to the P C file 100 at the bottom contacting the top of the P C file (100) ) Are combined.

Shear reinforcement 200 is formed to have a larger diameter than the P C pile 100 to have the same or greater bending strength than the conventional steel pipe 20, the side of the lower side of the shear reinforcement 200 is sheared on the ground It is formed to be inclined so that the reinforcement part 200 can be easily inserted.

The inside of the shear reinforcement 200 is provided with a plurality of steel wires 230 which are spaced apart at predetermined intervals along the circumferential direction thereof and extend along the length direction, and the steel wires 230 and the outside of the steel wires 230. A plurality of rebar 250 is provided on the concentric circles.

The reinforcement bar 250 extends along the longitudinal direction of the shear reinforcement part 200 and is provided with a plurality of first reinforcing bars 251 annularly spaced apart from a predetermined interval, and a plurality of first reinforcing bars 251 annularly arranged. It consists of the 2nd steel reinforcement 252 wound by the outer peripheral surface in spiral shape.

The diameter of the annular cross section formed by the first reinforcing bar 251 is larger than the annular cross section formed by the steel wire 230 so that the first reinforcing bar 251 is disposed outside the steel wire 230 and the second reinforcing bar 252. ) Is preferably fixed to each other by welding the first reinforcing bar 251.

In addition, a separate carbon fiber sheet 260 is provided on the circumferential surface of the shear reinforcement part 200 so as to surround the entire circumferential surface, and the carbon fiber sheet 260 is a shear or reinforcement part 200 such as an adhesive such as a primer or epoxy. After applying to the entire circumferential surface of the carbon fiber sheet 260 by pressing or impregnated with a roller or by curing the adhesive such as primer or epoxy to be provided to increase the bending strength of the shear reinforcement 200.

In addition, separate reinforcement bands that apply pressure to both ends of the carbon fiber sheet 260 so that the carbon fiber sheet 260 provided on the circumferential surface of the shear reinforcement 200 is not separated from the circumferential surface of the shear reinforcement 200. 270 is further provided, but the reinforcing band 270 may be provided only in one layer, but in some cases, it may be effective to be provided in two or three or more layers to reinforce the bending strength.

As shown in Figure 9, the structure of the shear reinforcement of the composite pile according to another embodiment of the present invention is the same as one embodiment or another embodiment of the present invention, except for a separate carbon fiber sheet 260 It has a configuration with a separate reinforcing band 270 for reinforcing the strength of one end of the shear reinforcing portion to which the seat plate 220 is coupled without having.

Although not shown in the drawing, the reinforcing band 270 is provided not only at one end of the shear reinforcement part provided with the seat plate 220, but also at the other end thereof opposite to the other side, thereby reinforcing the strength of the other end portion, so that the other end of the shear reinforcement part at the time of the non-stop reinforcement. Of course it can also prevent the damage.

The structure of the mold for producing the shear reinforcement of the composite pile having the configuration as described above is as follows.

The shear reinforcement part manufacturing mold 300 includes a tubular main surface forming housing 310 having a predetermined internal space 311 and having a constant diameter and having open ends, and a main surface along the longitudinal direction of the main surface forming housing 310. The inclined portion 321, which is disposed at a plurality of places inside the forming housing 310 and gradually decreases in diameter, is formed to extend in a predetermined length from the end of the inclined portion 321 and the inclined portion 321, and has a main surface forming housing 310. An end forming housing 320 having a smaller diameter and formed of an annular extension 322 having a hollow, and provided at an end of the end forming housing 320 to shield an end of the end forming housing 320 to the outside; At the same time includes a joint plate 330 for connecting to the neighboring end forming housing 320, and a shielding plate 340 provided at both open ends of the main surface forming housing 310 to shield the internal space 311 from the outside; Composed The.

The main surface forming housing 310 is a tubular member formed to have the same configuration as the mold for manufacturing the conventional P.C. pile 100, but should be formed to have a larger diameter than the mold for manufacturing the P.C. pile 100.

In addition, the end forming housing 320 is provided as a pair in which the extension portion 322 and the connecting plate 330 are in contact with each other in a state in which they are arranged in mutually opposite directions, so that the end forming housing 320 may be disposed at a plurality of locations of the main surface forming housing 310. It is more effective because it is possible to produce a plurality of shear reinforcement 200 by injecting concrete into the mold once disposed.

In addition, it is more effective that the end forming housing 320 is movably coupled to the interior of the main surface forming housing 310 selectively according to the length of the shear reinforcement 200 required.

The method of manufacturing the shear reinforcement part of the composite pile using the mold for manufacturing the shear reinforcement part will be described briefly as follows.

First, the steel wire 230 and the reinforcing bar 250 and the main surface forming housing 310 may be disposed so that the plurality of steel wires 230 and the reinforcing bar 250 may be disposed in the internal space 311 of the main surface forming housing 310. Assemble each other.

Then, the end forming housing 320 is disposed at a plurality of places in the main surface forming housing 310 according to the length of the shear reinforcing portion 200 required.

When the arrangement of the end forming housing 320 is completed, a predetermined amount of concrete is added to the inner space 311 of the main surface forming housing 310 to form a thickness of the shear reinforcing part 200, and the main surface forming housing ( The shield plate 340 is fastened to both opened ends of the 310 to prevent the concrete introduced into the outside from leaking out.

Thereafter, the mold 300 is rotated in a centrifugal table for the purpose of compacting, and then the compacted concrete is formed in the mold 300 by using a centrifugal force to form a product in a cylindrical shape.

Then, after performing atmospheric steam curing, which is a kind of accelerated curing, in order to promote the curing of the product, the product is removed from the mold, and the carbon fiber sheet 260 is attached to the peripheral surface by applying an adhesive such as a primer or epoxy. After the carbon fiber sheet 260 is compressed or impregnated with a roller, the adhesive is cured and the separate reinforcing bands 270 are wound on both ends to manufacture the shear reinforcement part 200.

Method for constructing a composite file in the ground according to an embodiment of the present invention is as follows.

As shown in FIG. 11, after drilling the ground using a separate boring device in the ground into which the composite pile is to be inserted, the milk 400 may be formed so that only a part of the shear reinforcement part 200 may protrude to the ground. Injecting, and by hitting the top surface of the shear reinforcement portion 200 is a part protruding to complete the construction of the composite pile on the ground.

As shown in FIG. 12, after drilling the ground using a separate boring device in the ground into which the composite file is to be inserted, a separate casing 500 is inserted into the perforated ground and only a part of the shear reinforcement part 200 is ground. Injecting the milk 400 in an amount enough to protrude into, and by hitting the top surface of the shear reinforcement portion 200 is a part protruding to complete the construction of the composite pile on the ground.

As shown in FIG. 13, the P.C file 100 is drilled after the ground is drilled to a diameter such that only the P.C file 100 can be inserted using a separate boring device in the ground to insert the composite file. It is inserted into the ground and the shear reinforcement portion 200 is in the state over the ground by directly hitting the top surface of the shear reinforcement portion to be inserted into the ground to complete the construction of the composite pile.

In the above, the present invention has been described through the preferred embodiment according to the construction method of the composite pile, the shear reinforcement part manufacturing method and the composite pile. Of course not.

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. There is no saying.

100: PA file 110: First Department
120: steel wire 140: seat
141: fixing groove 142: recess
150: tip extension 200: shear reinforcement
210: second hollow portion 220: seat plate
230: steel wire 250: rebar
251: first rebar 252: second rebar
260: carbon fiber sheet 270: reinforcing band
300: mold 310: main surface forming housing
320: end forming housing 321: inclined portion
322: extension 330: connecting plate
340: shield plate

Claims

A P C file having a first hollow portion extending in a height direction and having a plurality of steel wires embedded at regular intervals along a circumferential direction;
And a shear reinforcing part fixedly coupled to one end of the PH file, the second reinforcing part communicating with the first hollow part at the center thereof, and having a larger diameter than the PH file. Compound file.

The method of claim 1,
The composite pile, characterized in that the side of the one end of the shear reinforcing portion fixed to the one end of the P H file is formed to be inclined.

The method of claim 2,
The shear reinforcement portion is a composite file, characterized in that a plurality of steel wires are disposed to be spaced apart by a predetermined interval in the circumferential direction of the shear reinforcement portion.

The method of claim 3,
The composite pile, characterized in that the outer side of the steel wire inherent in the shear reinforcement portion is provided with a plurality of reinforcing bars arranged on the concentric circles with the steel wire.

The method of claim 4, wherein
The reinforcing bar extends along the longitudinal direction of the shear reinforcing part, and the plurality of first reinforcing bars are annularly disposed at predetermined intervals and the second reinforcing bars are spirally wound around the plurality of annular first reinforcing bar peripheral surfaces. Compound file, characterized in that consisting of.

The method of claim 5,
And a front end extension portion formed at a predetermined height on a circumferential side of the opposite side end portion of the PA pile to which the shear reinforcement portion is coupled, to have a diameter larger than the diameter of the PA.

The method of claim 6,
The circumferential surface of the shear reinforcement portion is a composite file, characterized in that the carbon fiber sheet formed to surround the entire circumferential surface.

The method of claim 7, wherein
The carbon fiber sheet is a composite pile, characterized in that by applying a primer or epoxy to the circumferential surface of the shear reinforcement portion by roller pressing or impregnation.

9. The method of claim 8,
Composite ring, characterized in that the annular reinforcement band is provided on the outer peripheral surface of both ends of the carbon fiber sheet provided on the circumferential surface of the shear reinforcement.

A tubular main surface forming housing having a predetermined internal space and having a constant diameter and having openings at both ends thereof;
An inclined portion which is disposed at a plurality of places inside the main surface forming housing along a longitudinal direction of the main surface forming housing and gradually decreases in diameter, and has a hollow, and extends to a predetermined length at an end of the inclined portion; An end forming housing having a smaller diameter and consisting of an annular extension formed with a hollow;
A connection plate provided at an end of the end forming housing to shield an end of the end forming housing to the outside;
Molds for manufacturing the shear reinforcement portion of the composite pile, characterized in that it comprises a shielding plate provided at both ends of the opening of the main surface forming housing to shield the internal space from the outside.

The method of claim 10,
The end forming housing is provided with a pair in which the extension portion and the connecting plate are in contact with each other in a state arranged in an opposite direction, the shear reinforcement portion of the composite pile, characterized in that arranged in a plurality of places of the main surface forming housing Mold for manufacturing.

The method of claim 11,
The end forming housing is a mold for manufacturing a shear reinforcement part of the composite pile, characterized in that assembled in the interior of the main surface forming housing to be movable along the longitudinal direction of the main surface forming housing.

A method of constructing a composite pile according to any one of claims 1 to 9 on the ground,
A first step of drilling the ground using a boring device to have a diameter into which the P.C pile can be inserted;
Inserting the PHC file into the perforated ground;
A third step of directly hitting the shear reinforcing part protruding to the outside;
Construction method of a composite file comprising the.

The method of claim 13,
Method of constructing a composite pile further comprises the step of injecting milk into the perforated ground between the first step and the second step.