KR100702200B1 - Prestressed spun high strength concrete pile for reinforcement of Tensile material at Outer Circumference of Pile and Method for manufacture of the same - Google Patents

Abstract

The present invention in the pile synthesized tensile material and concrete,

The tension member 1 is formed with a bent waveform on its outer circumferential surface, and the inside of the tension member 1 is filled with concrete (2) having a hole penetrated in the longitudinal direction of the pile, the inside of the concrete in the form of a spiral It relates to a prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the PC steel bar (3) to which the tensile force reinforced by the reinforcing bar 6 is applied is fixed in a columnar arrangement at regular intervals.

Therefore, the present invention is the effect of the concrete piles and steel pipe piles introduced with prestressing because the concrete is filled by using a centrifugal force after fixing the steel rods reinforced with spiral reinforcement inside the tension member formed with a curved wave formed on the outer peripheral surface At the same time, it is possible to take advantage of the high compressibility of pretensioned centrifugal prestressed concrete piles and to reinforce the low tensile strength of pretensioned centrifugal prestressed concrete piles and the low brittleness and tensile strength of concrete piles with steel pipes wrapped around the pile's outer surface.

In addition, after fixing the PC steel bar reinforced with spiral reinforcement inside the tension member with the curved wave form on the outer circumferential surface, the concrete is filled by centrifugal force to synthesize the tension material with the PC steel bar and the concrete. Since the adhesion area between concrete and tension member is wide and stable, and the friction force between soil is increased, the friction support force of pile is improved, and the shape of tension member is formed in curved wave form, which increases the strength of tension member. Therefore, it is economical because steel pipes with thinner steel pipes can be used as compared to conventional synthetic piles.

Tensile, Concrete, Pile, Bend Wave, Spiral, Reinforcing Bar, PC Steel Bar, Prestress, Steel Pipe, Segment

Description

Prestressed spun high strength concrete pile for reinforcement of Tensile material at Outer Circumference of Pile and Method for manufacture of the same

1a and 1b are a plan view and a perspective view of a conventional steel pipe pile.

Figure 2a to 2c is a plan view and a perspective view of a prestress pile reinforced with a tension member is formed bent waveform in the pile longitudinal direction on the outer peripheral surface of the pile according to the present invention.

3a to 3c is a plan view and a cross-sectional view of a prestress pile reinforced with a tension member having a curved wave formed in the circumferential direction on the outer peripheral surface of the pile according to the present invention.

Figures 4a to 4c is a plan view and a cross-sectional view of the prestress pile reinforced by the tension member is divided into two segment members having a curved wave formed on the outer peripheral surface of the pile according to the present invention.

Explanation of symbols on the main parts of the drawings

1: tension member 2: concrete

3: PC steel bar 4: fastener

5: flange 6: rebar

7: first segment member 8: second segment member

The present invention relates to a prestressed pile reinforced with a tension member on the outer peripheral surface of the pile and a method of manufacturing the same, and more specifically, to fix the PC steel bar reinforced with spiral reinforcement in the tension member inside the tension member having a curved wave formed on the outer peripheral surface thereof. After filling the concrete by centrifugal force, the tensile material and PC steel bar and concrete are synthesized to improve the adhesion between the concrete and the tension material by the bending wave, and the internal pressure, tensile force and bending strength of the prestress pile are controlled by the binding effect of the attached tension material. The prestress pile reinforced with a tension member on the outer circumferential surface of the pile, characterized in that the member strength is improved to effectively compensate for the lateral load due to the vibration, such as earthquakes, and cracks that may occur at the time of hitting than the conventional prestress pile. will be.

In general, piles are made of concrete-only centrifugal reinforce concrete piles (RC), pretensioned centrifugal prestressed concrete piles (PC) with PC bars inserted into the concrete, and pretensioned centrifugal force high-strength prestressed concrete piles ( There are PHC, Prestressed Spun High Strength Concrete Pile, and Steel Concrete Pile (SC) filled with concrete inside steel pipe and Steel Pile (S, Steel Pile) consisting only of steel pipe.

Among the piles, the steel pipe composite pile is filled with concrete 2 only in the inside of the steel pipe, which is the tension member 1, and cured by centrifugal force as shown in FIGS. 1A and 1B to support the load by integrating the steel pipe and concrete. As the strength and weakness of concrete piles are compensated for, it is used a lot, but there is a risk of corrosion by using ready-made steel pipe piles on the outer circumferential surface, and it is uneconomical because thick steel pipes having a thickness of 6m / m or more are used. The concrete inside is simply filled with concrete without reinforcing wire mesh and PC steel bars, so the rigidity of the concrete is relatively weak.There is a possibility that the adhesive part of the inner concrete and the steel pipe may be detached due to the use of ready-made round steel pipe. It is relatively expensive.

Therefore, the present invention is to solve the problems as described above by fixing the steel rods reinforced with spiral reinforcement in the tension material inside the tension material by filling the concrete using centrifugal force to synthesize the tension material and PC steel bars and concrete, the interior of the concrete It has the effect of pretension centrifugal force prestressed concrete piles with PC steel rods inserted into the steel pipes and steel pipe composite piles filled with concrete inside the steel pipes. It is an object of the present invention to provide a prestressed pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the low tensile strength and low brittleness and tensile strength of the concrete pile can be reinforced with a steel sheet wrapped around the outer peripheral surface of the pile.

Still another object of the present invention is to set up a PC steel bar reinforcement with spiral reinforcement inside the tension member formed with a curved wave shape on the outer peripheral surface and to fill the concrete using centrifugal force to synthesize the tension member, PC steel bar and concrete, the external reinforcement form Prestress piles reinforced with tension members on the outer circumference of the pile, characterized by the fact that the curved area is formed and the adhesion area between the concrete and the tension member is wide and stable, and the frictional force between the soil is increased to improve the friction support of the pile. In providing a method.

In particular, the present invention, after fixing the steel rods reinforced with spiral reinforcement in the tension member formed with a curved wave formed on the outer circumferential surface to fill the concrete using centrifugal force to synthesize the concrete piles and steel pipe piles with prestressing At the same time. Therefore, the pile has higher compressibility than the existing pile, and the external reinforcement shape is formed in the shape of the curved wave, which increases the strength of the tensile material. Therefore, the conventional synthetic pile should use a thick steel pipe having a steel pipe thickness of 6 m / m or more. The pile of the present invention is economical because a thin steel pipe having a thickness of 2 m / m may be used.

When the configuration of the present invention as a means for solving the above problems will be described with reference to the accompanying drawings as follows.

2a to 2c is a plan view and a perspective view of a prestressed pile reinforced with a tension member having a bending waveform formed in the pile longitudinal direction on the outer peripheral surface of the pile according to the present invention, in the pile synthesized tensile material and concrete,

The tension member 1 is formed with a bent waveform in the longitudinal direction of the pile on the outer peripheral surface, the inside of the tension member 1 is filled with concrete (2) formed through the hole in the longitudinal direction of the pile, the concrete (2 ) Is a prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the PC steel bar (3) applied to the tensile force reinforced by the reinforcement (6) is fixed in a columnar arrangement of a regular interval.

As another embodiment of the present invention Figure 3a to 3c relates to a plan view and a perspective view of a prestress pile reinforced with a tension member having a curved wave formed in the circumferential direction on the outer peripheral surface of the pile according to the present invention, in the pile synthesized tensile material and concrete,

The tension member 1 is formed with a bent waveform in the circumferential direction on the outer circumferential surface thereof, filled with concrete (2) having a hole penetrated in the longitudinal direction of the pile inside the tension member (1), the concrete (2) ) Is a prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the PC steel bar (3) applied to the tensile force reinforced by the reinforcement (6) is fixed in a columnar arrangement of a regular interval.

4A to 4C illustrate a plan view and a cross-sectional view of a prestress pile reinforced with a tension member divided into two segment members having a curved wave formed on the outer circumferential surface of the pile according to the present invention, and the tension member and the concrete divided into two segment members. In the pile synthesized,

The tension member 1 is composed of a first segment member 7 and a second segment member 8 having a curved wave in the longitudinal direction of the pile on its outer circumferential surface, and the flanges 5 which abut each other at both ends of the segment members. It is coupled to the fastener (4) through the holes formed at regular intervals on the surface, and the inside of the coupled tension member (1) is filled with concrete (2) formed with holes in the longitudinal direction of the pile, the concrete ( The inside of 2) relates to a prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the PC steel bar (3) subjected to the tensile force reinforcement by the reinforcement (6) is fixed in a columnar arrangement of a regular interval.

4A to 4C, the tensile member divided into two segment members of FIGS. 4A to 4C and the tensile member of the pile synthesized concrete have a curved wave formed on the outer circumferential surface thereof in the longitudinal direction of the pile, as described above. It may be formed in the circumferential direction.

In the pile of FIGS. 2a to 4c, the reinforcing bars in each pile are welded to the PC steel rods 3 in a columnar arrangement in a spiral form. In addition, since the material to be located outside the pile must be stable against corrosion so as to increase the durability life of the pile, an anticorrosive or coated metal tube can be used, and preferably a galvanized steel tube is used. In addition, the tension member 1 may be formed in the form of a cylindrical steel pipe having a curved wave shape or two divided segment members cut in the longitudinal direction of the cylindrical steel pipe. The number of segment members may be two or more, depending on the shape of the structure and the need. The segment members are then fastened with fasteners 4, such as bolts and nuts, through the holes formed in the flanges at both ends, or are joined to each other by welding.

The present invention is to provide a tensile member on the outer circumferential surface of the centrifugal force high strength prestress pile, to compensate for the disadvantages of tensile and shear failure, bending moment, cracking, impact fracture, etc., which is relatively weaker than compressibility, which is a disadvantage of the centrifugal force high strength prestress pile, and steel pipe pile It can be used to effectively exhibit the tensile strength of the. And by forming a curved wave on the outer circumferential surface of the tension member in the longitudinal direction or the circumferential direction of the pile, the adhesion area between the concrete and the tension member is wide and stable, and the frictional force between the soil is increased, thereby improving the friction support of the pile. In addition, since the tensile member has an effect of increasing the strength of the tensile member due to the bending waveform formed on the outer circumferential surface thereof, a tensile member thinner than the thickness of the tensile member used in the ready-made synthetic pile can be used.

And as shown in Figures 4a to 4c is a prestress pile reinforced by the tension member is divided into two segment members formed with two curved segments formed on the outer peripheral surface of the pile according to the present invention, although the curved waveform is formed in the longitudinal direction of the pile Like the pile 3, a curved wave may be formed in the circumferential direction of the circumferential surface of the pile.

Method for producing a prestress pile reinforced with a tension member on the outer peripheral surface of the pile according to the present invention is as follows.

Iii) welding the spiral reinforcing bars to the outer circumferential surface of the PC steel bar arranged in the columnar form and reinforcing in a spiral form;

Ii) fixing the reinforced PC steel bar to the inside of the steel pipe having a curved wave;

Iii) filling concrete inside the steel pipe by a predetermined interval by centrifugal force;

It is manufactured through.

In step iii), as in the conventional manufacturing method of centrifugal high strength prestressed concrete piles, rebars are welded to the columnar PC steel bars in a spiral form, and in step ii), the segment member is divided into two segment members. After coupling, you may go through the steps of installing a PC steel bar inside. And in the steps ii) and iii), as in the general method of manufacturing high strength prestress piles, PC steel rods are installed inside the steel pipe, and concrete is filled in the steel pipe by a predetermined interval by centrifugal force.

The pile manufacturing method according to the present invention is a method for producing a pile that takes the advantages of high strength prestressed concrete piles and the advantages of steel pipe composite piles at the same time.

Therefore, the present invention is the effect of the concrete piles and steel pipe piles introduced with prestressing because the concrete is filled by using a centrifugal force after fixing the steel rods reinforced with spiral reinforcement inside the tension member formed with a curved wave formed on the outer peripheral surface At the same time, it is possible to take advantage of the high compressibility of pretension centrifugal prestressed concrete piles and to reinforce the low tension of pretension centrifugal prestressed concrete piles and the low brittleness and tensile strength of concrete piles with steel sheets wrapped around the pile's outer surface.

In addition, after installing PC steel rods reinforced with spiral reinforcement inside the tension member with a curved wave form on the outer circumferential surface, the concrete is filled by centrifugal force to synthesize the tensile material, PC steel rod and concrete, and the external reinforcement form is formed with a curved wave shape. Therefore, the adhesion area between concrete and tension member is wide and stable, and the frictional force between soil is increased, so the frictional bearing capacity of pile is improved, and the shape of tension member is formed in a curved wave form, which increases the strength of tension member. It is economical because steel pipes with thinner steel pipes can be used compared to composite piles.

The present invention is not a principle of reinforcing the compressive force of the steel pipe pile by filling concrete in the inside of the ready-made steel pipe pile, which is the principle of the ready-made composite pile, but a method for reinforcing the tensile strength of the high strength prestressed concrete pile, not high-strength prestressed steel pipe. It is economical because you can use thin steel plates to reinforce only the tensile strength of the concrete piles.

Claims (8)

In the pile which synthesized tension material and concrete, The tension member 1 is formed with a bent waveform in the longitudinal direction of the pile on the outer peripheral surface, the inside of the tension member 1 is filled with concrete (2) formed through the hole in the longitudinal direction of the pile, the concrete (2 Prestress pile reinforced with a tension member on the outer circumferential surface of the pile, characterized in that the PC steel bar (3) applied to the tensile force reinforced by the reinforcement (6) is fixed in a columnar array at regular intervals. In the pile which synthesized tension material and concrete, The tension member 1 is bent in the circumferential direction is formed on the outer peripheral surface, the inside of the tension member 1 is filled with concrete (2) formed through the hole in the longitudinal direction of the pile, the concrete (2) The prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the PC steel bar (3) subjected to the tensile force reinforced by the reinforcement (6) is fixed in a columnar array of a constant interval. In the pile composite of the tension material and the concrete divided into two segment members, The tension member 1 is composed of a first segment member 7 and a second segment member 8 having a curved wave in the longitudinal direction of the pile on its outer circumferential surface, and the flanges 5 which abut each other at both ends of the segment members. It is coupled to the fastener (4) through the holes formed at regular intervals on the surface, and the inside of the coupled tension member (1) is filled with concrete (2) formed with holes in the longitudinal direction of the pile, the concrete ( 2) prestress piles reinforced with a tension member on the outer peripheral surface of the pile, characterized in that the PC steel bar (3) subjected to the tensile force reinforcement by the reinforcement (6) is fixed in a columnar array at regular intervals. The prestressed pile according to any one of claims 1 to 3, wherein the reinforcing bars 6 are joined by welding in a spiral form to the PC steel bars 3 in a columnar arrangement. . The prestressed pile according to any one of claims 1 to 3, wherein the tension member (1) uses a metal tube subjected to anticorrosion treatment or coating treatment. 6. The prestressed pile according to claim 5, wherein the metallic tube is a galvanized steel tube. Iii) welding the spiral reinforcing bars to the outer circumferential surface of the PC steel bar arranged in the columnar form and reinforcing in a spiral form; Ii) installing the reinforced PC steel bar inside the steel pipe having a curved wave; Iii) filling concrete inside the steel pipe by a predetermined interval by centrifugal force; Method for producing a prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that is produced through. 8. The method of claim 7, wherein the step ii) in the manufacturing method of the step (iii) to (iii) comprises the steps of: fixing the reinforcing PC steel bar inside the tension member after joining the two segmented members; Method for producing a prestress pile reinforced with a tension member on the outer peripheral surface of the pile, characterized in that is produced through.

Images