KR101241994B1 - Reinforcing block used in concrete pile and concrete pile using the same - Google Patents

Abstract

Disclosed are a reinforcing block for a concrete pile and a concrete pile using the same. Concrete piles are concrete pillars; A reinforcing block coupled to one end of the concrete column, the outer diameter of which is larger than the outer diameter of the concrete column; And tension members for prestressing the concrete columns and the reinforcing blocks in a longitudinal direction. It includes, The tension member is characterized in that one end is fixed to the front end surface that is the opposite surface of the surface in contact with the concrete pillar of the reinforcing block. The reinforcing block is connected to one end of the column pillar contact; And a front end surface formed on an opposite surface of the column joining portion, wherein a tension hole is formed through the column joining portion and the front end surface, and a diameter is formed larger than the diameter of the concrete pillar. Therefore, by directly fixing the tension member to the reinforcement block, since the reinforcement block is installed on the concrete pile at the same time as the molding and mold demoulding, the manufacturing process is simple and components can be omitted, thereby reducing the manufacturing cost. do.

Description

Reinforcement block for concrete pile and concrete pile using it {REINFORCING BLOCK USED IN CONCRETE PILE AND CONCRETE PILE USING THE SAME}

The present invention relates to a concrete pile, and more particularly to a concrete pile produced by centrifugal molding.

In general, in the case of erecting a building or structure, in order to support the upper structure according to the condition of the ground or the load of the building or structure, the foundation construction to reinforce the ground.

As a result, a shallow foundation or a deep foundation is performed according to various conditions such as the load of the structure and the ground conditions. The case where the root width ratio is 1 or less is called the shallow foundation, and the case where the root width ratio is 1 or more is defined as the deep foundation. .

In the case of the shallow foundation, the structure is directly supported on the ground without using the pile, and the pile is used to reinforce the bearing force when the ground under the structure cannot support the load of the upper structure.

The piles can be classified into steel pipe piles, concrete piles, composite piles, etc., depending on the material.

Recently, PHC piles manufactured by centrifugal force and autoclave curing are widely used among concrete piles. The PHC pile is a high-strength pile with a pretensioning method. The allowable compressive stress of the concrete is so large that it can withstand a great celebration. The prestress is introduced into the concrete to provide excellent impact strength and excellent tensile stress.

1 is a diagram showing such a conventional PHC file. As shown in FIG. 1, in the conventional PHC pile, a lower shoe plate 2 having a reinforcing band is integrated at a lower end of a concrete column 3 formed of concrete, and a tension hole 2a of the lower shoe plate 2 is provided. After fixing the PC steel wire (3) to the PC steel wire (3) is formed to apply a prestress to the concrete pillar (3).

In order to increase the tip bearing capacity of the PHC pile formed as described above, a reinforcing plate 4 having a diameter larger than the outer diameter of the pile is placed at the bolt hole 4a provided in the reinforcing plate and the bolt hole 2b provided in the lower shoe plate. The reinforcing plate is attached to the lower shoe plate by inserting or welding the bolt 5.

However, in the PHC pile according to the prior art, since the lower shoe plate is not a structural member that bears a load, it is generally formed to have a thin thickness in consideration of economical efficiency, so that the PC steel wire is deformed to the member when being tensioned with a strong tensile force. There was a prone problem.

In addition, in the conventional PHC pile, the reinforcement plate as a structural member that bears a load in order to reinforce the tip bearing capacity of the pile has to be installed separately in the field or factory after curing the concrete of the PHC pile. There was a problem that the installation of a large reinforcing plate was not easy.

An embodiment of the present invention is to provide a concrete pile block and a concrete pile using the same, which can increase the tip bearing capacity, despite the simplified structure of the concrete pile.

According to an embodiment of the present invention, one end of the concrete pillar is in contact with the joint; And a front end surface formed on an opposite surface of the column joined portion. It includes, the through-hole and the end surface through the tension hole is formed, provides a reinforcement block for a concrete pile, characterized in that the diameter is formed larger than the diameter of the concrete pillar.

 Here, the formwork support surface for supporting one end of the formwork used in the manufacture of the concrete pile is formed on the outside of the pillar joining portion, the formwork support surface is formed to protrude relative to the pillar joining portion.

In addition, the tension hole has a tapered surface diameter is reduced toward the concrete pillar.

The insertion hole communicates with the tension hole and has a diameter larger than that of the tension hole.

The reinforcement block for the concrete pile is formed of a concrete material.

The lower shoe plate is fixed to the front end surface.

It is preferable to further include a reinforcing band surrounding the side of the reinforcement block for the concrete pile.

On the other hand, the reinforcement block for the concrete pile may be formed of a synthetic resin material.

On the other hand, an embodiment of the present invention, a concrete pillar; A reinforcing block coupled to one end of the concrete column, the outer diameter of which is larger than the outer diameter of the concrete column; And a tension member that applies prestress in the longitudinal direction to the concrete column and the reinforcement block, wherein the tension member is fixed at one end to an end surface of the reinforcement block opposite to a surface in contact with the concrete column. To provide concrete piles.

In another aspect, the present invention is to prepare a reinforcing bar assembly by assembling the tension member and to insert the reinforcing bar assembly into the lower mold; Disposing a reinforcing block at one end of the lower mold; Fixing the tension member to a tension hole formed in the reinforcement block; Fixing the other end of the tension member to a tension device; Injecting concrete into the lower mold and fastening the upper mold to the lower mold; Driving the tensioning device to tension the tensioning member; It provides a concrete pile manufacturing method comprising a; and curing after centrifugal molding in the tensioned state of the tension member.

The step of disposing the reinforcing block, the step of installing a position fixing protrusion on the outside of one end of the lower mold and mounting the reinforcing block to the position fixing protrusion; It includes.

The reinforcing block has an outer diameter larger than the outer diameter of the concrete pillar formed by the upper mold and the lower mold.

According to one embodiment of the present invention, the following effects are expected. However, it is not necessarily falling within the scope of the present invention if all of the following effects are exerted.

Conventionally, after the tension member is fixed to the lower shoe plate, the lower shoe plate is fixed to the support plate for fixing in order to fix the lower shoe plate when the tension member is tensioned, and after curing the poured concrete, demoulding the fixing support plate again, and reinforcing plate Although the construction process was complicated and the procedure was cumbersome, such as fixing to the lower shoe plate again, according to the present invention, as described above, the tension member is directly fixed to the reinforcement block without the need for the lower shoe plate and the fixing support plate. Simultaneous with the demoulding, since the reinforcing block is installed on the concrete pile, the manufacturing process is simple and the component parts can be omitted, thereby reducing the manufacturing cost.

In addition, since the reinforcing block is formed of a concrete material, it is formed integrally with the concrete column, so that the rigidity can be increased, and since the tension member can apply a tensile force over the concrete column and the reinforcing block, the rigidity can be further increased.

In addition, since the tension member may be directly fixed to the reinforcing block, which is a thick structural member, the tension member may be directly tensioned, thereby preventing deformation easily occurring in the member when the tension member is tensioned.

In addition, since the installation of the lower shoe plate is omitted during the manufacture of the concrete pile, the support plate for tension is eliminated, and the reinforcement block for reinforcing the tip bearing capacity of the pile can be directly installed during the manufacture of the concrete pile, thereby reducing the construction work time. The material required for this can be reduced. In addition, it is also easy to fix the position and installation of the reinforcement block weight by installing the position fixing projections.

Figure 1 is an exploded perspective view showing such a conventional PHC file
Figure 2 is a perspective view of the reinforcing block for concrete piles of one embodiment of the present invention
3 is a bottom view of FIG. 2
4 is a cross-sectional view taken along the cutting line IVIV of FIG. 3, and FIG. 5 is a cross-sectional view taken along the cutting line V-V of FIG. 2.
Figure 6 is an exploded perspective view of the manufacturing apparatus of the concrete pile of one embodiment of the present invention
7 is a flow chart showing a concrete pile manufacturing method of an embodiment of the present invention using the manufacturing apparatus of FIG.
8 is a right side view of Fig. 6
9 is a cross-sectional view of the concrete pile in the state that the formwork is bonded after curing
10 is a concrete pile of one embodiment of the present invention
11 is a cross-sectional view showing a modification of the concrete pile of the present invention.
12 is an exploded perspective view showing an apparatus for manufacturing the concrete pile of FIG.
Figure 13 is a side view showing a modification of the position fixing projection

Hereinafter, with reference to the drawings will be described in detail.

2 is a perspective view of a reinforcing block for a concrete pile according to an embodiment of the present invention, FIG. 3 is a bottom view of FIG. 2, FIG. 4 is a sectional view taken along the cutting line IVIV of FIG. 3, and FIG. 5 is a cutting line V-V of FIG. 2. In accordance with the cross-sectional view.

As shown in these drawings, the reinforcing block 100 for a concrete pile of an embodiment of the present invention is a line formed on the opposite side of the column junction portion 110 and the column junction portion 110 is in contact with one end of the concrete pillar 200 It is formed in a cylindrical shape including a cross section (120).

The reinforcement block 100 is formed to have a diameter larger than that of the concrete column 200. In addition, the formwork support surface 130 for supporting one end of the formwork used in the manufacture of the concrete pile is formed on the outer side of the pillar joining portion, the formwork support surface 130 is formed to protrude relative to the pillar joining portion. That is, the concrete pillars 200 are inserted through the hollows formed in the formwork support surface 130 to be in contact with the pillar junctions 110.

Reinforcement block 100 may be formed of a concrete material, or may be formed of a synthetic resin material. When formed of a concrete material, rebar (not shown) may be disposed according to the size of the reinforcement block 100. In addition, the lower shoe plate 123 formed of a steel plate is fixed to the front end surface 120, and a reinforcing band 140 surrounding the reinforcing block 100 for concrete piles is attached to the side surface. The reinforcing band 140 is formed of a metal material, and not only prevents the reinforcing block 100 formed of the concrete material from being broken, but also prevents the lower shoe plate 123 and the reinforcing block 100 of the concrete from spreading, and thus joining force. It serves to increase.

The reinforcement block 100 may be formed of a synthetic resin material. However, since it is used as a basis, since a desired degree of strength is required, it is preferable that FRP (fiber reinforced plastic) having a high rigidity is used.

A tension hole 121 is formed through the pillar junction 110 and the front end surface 120 of the reinforcement block 100, and the tension hole 121 is smaller in diameter toward the concrete pillar 200. The tapered surface 122 is provided. The tapered surface 122 is formed on the lower shoe 123 when the load is applied by the tension member.

The insertion hole 125 communicates with the tension hole 121 and has a diameter larger than that of the tension hole. Therefore, after the tension member is inserted through the insertion hole 125, the tension member is moved to the tension hole 121 so that the tension member is coupled to the tapered surface 122.

Hereinafter, a method of manufacturing a concrete pile using the aforementioned reinforcement block for the concrete pile will be described.

6 to 8, the method of manufacturing a concrete pile (more specifically PHC pile) according to the present invention, by assembling the tension member 20 to prepare a reinforcing bar assembly and the reinforcing bar assembly in the lower mold (60) Step (S1) and the step of placing the reinforcement block 100 at one end of the lower mold (60) and the tension in the tension hole 121 formed in the reinforcement block 100 Fixing the member 20 (S3), and fixing the other end of the tension member to the tensioning device (not shown) (S4), the concrete is put into the lower mold 60 and the lower mold 60 Fastening the upper mold to (S5), driving the tensioning device to tension the tension member (20), and curing the centrifugal molding in the tensioned state of the tension member (20). Steps S7 and S8 are included.

In the preparing of the reinforcing bar assembly, a plurality of tension members 20 are disposed at regular intervals using a rebar knitting machine (not shown), and a reinforcing bar of a spiral shape is arranged around the tension member to prepare a reinforcing bar assembly. .

Wherein the tension member 20 is usually used PC steel wire, the head portion (20a) formed at both ends is formed in a coarse, the diameter is smaller than the diameter of the insertion hole 125, the tension of the hole 121 It is formed larger than its diameter. As a result, after inserting the head portion 20a through the insertion hole 125, the tension member 20 is moved to the tension hole 121 position, and when tensioning, the head portion 20a is tapered. The surface 122 is caught.

Arranging the reinforcing block (S2), the step of installing the position fixing projections 70 on the outside of one end of the lower mold 60 includes the step of mounting the reinforcement block on the position fixing projections (70). do. As shown in FIG. 8, the position fixing protrusion 70 protrudes at the end of the lower mold 60 to support the reinforcing block 100 at the correct position. Here, the reinforcing block is configured to have an outer diameter larger than the outer diameter of the concrete pillar, the position fixing protrusion may be installed in an appropriate position in consideration of the size of the reinforcing block, that is, the outer diameter of the reinforcing block. The position fixing protrusion 70 is installed to protrude to the outside of one end of the lower mold 60, after cutting the rebar, etc. to a predetermined length to be fixed to the lower mold 60 by welding or the like method. Can be. In addition, the position fixing protrusion 70 may be implemented in various forms that can be mounted on the outer circumferential surface of the reinforcement block. That is, as shown in Figure 13, it may be formed in the form of 'b' is formed to surround the reinforcement block.

Fixing the tension member 20 (S3) after passing the tension member 20 through the reinforcing block 100 through the insertion hole 125, the tension member 20 to the tension hole 121 side. Move it. Then, a tensile force is applied to the tension member 20, and the head portion 20a of the tension member is caught by the tapered surface 122 of the tension hole 121.

Fixing the other end of the tension member to the tensioning device (S4), the step of placing the upper shoe plate 30 on the opposite side of the side on which the reinforcing block is disposed and fixing the tension member to the upper shoe plate (S41), and Connecting the tension support plate 61 to the upper shoe plate (S42), and fixing the tension support plate 61 to the tensioning device (S43). Here, the tensioning device is connected to the tension plate 62 is connected to the tension support plate 61, the copper plate 63 in contact with the other end of the lower mold, and the center of the copper plate 63 can be moved back and forth And a tensioning jack (not shown) connected to the tensioning shaft to apply a tensile force to the tensioning shaft.

In step S6 of tensioning the tensioning member, the tensioning device 20 is tensioned by driving the tensioning device. At this time, the tensile force, the tensile force is transmitted to the path of the jack for tension → tension shaft → copper plate → tension plate → tension support plate → fixing bolt of the tension support plate → upper shoe plate → tension member → reinforcement plate.

Curing step (S7, S8) is the step of steam curing after centrifugal molding in the tensioned state of the tension member (S7), and after the steam curing, demoulding the upper and lower molds and the tension support plate and tension jack The step of putting the tension member in the autoclave and the secondary high temperature and high pressure curing (S8).

Here, the centrifugal molding is about 10 minutes, the steam curing is cured at 70 ℃ ~ 80 ℃ for about 4 hours. In addition, autoclave curing is cured more than 8 hours at 180 ℃, 10 atm.

Through such a manufacturing process, the concrete pile of one embodiment of the present invention is completed.

10 is a perspective view of a concrete pile of one embodiment of the present invention.

As shown, the concrete pile of the embodiment of the present invention is coupled to the concrete pillars 200, one end of the concrete pillars 200, the outer diameter of the reinforcement block 100 is formed larger than the outer diameter of the concrete pillars, and It includes a tension member 20 for applying prestress in the longitudinal direction to the concrete pillar 200 and the reinforcing block 200. One end of the tension member 20 is fixed to a front end surface opposite to a surface of the reinforcing block in contact with the concrete pillar.

Detailed description of these components is replaced with the description of the reinforcement block 100 described above, and the description of the method for manufacturing a concrete pile.

Conventionally, after the tension member is fixed to the lower shoe plate, the lower shoe plate is fixed to the support plate for fixing in order to fix the lower shoe plate when the tension member is tensioned, and after curing the poured concrete, demoulding the fixing support plate again, and reinforcing plate Although the construction process was difficult and the procedure was cumbersome, such as fixing to the lower shoe plate again, according to the present invention, as described above, the lower member and the fixing support plate are not required, and the tension member is directly fixed to the reinforcing block, thereby forming and demoulding the mold. At the same time, since the reinforcing block is installed on the concrete pile, the manufacturing process is simple and components can be omitted, thereby reducing the manufacturing cost.

In addition, since the reinforcing block is formed of a concrete material, it is formed integrally with the concrete column, so that the rigidity can be increased, and since the tension member can apply a tensile force over the concrete column and the reinforcing block, the rigidity can be further increased.

Here, instead of the upper shoe plate, as shown in FIG. 11, an upper reinforcement block 100 ′ may be installed. Since the installation of the upper reinforcement block 100 'is the same as the installation of the reinforcement block 100, a duplicate description thereof will be omitted. When the upper reinforcing block 100 'is installed, the structure of the tension supporting plate 61 may be omitted, and the copper plate 63 is formed through the upper insertion hole of the upper reinforcing block 100'. It can be used by connecting a tensioning device directly to the upper reinforcing block by connecting by means such as bolts.

By manufacturing by the above-described method, the tension member can be directly fixed to the reinforcing block, which is a thick structural member, and can be tensioned, thereby preventing deformation that is likely to occur in the member when the tension member is tensioned. In addition, since the installation of the lower shoe plate is omitted during the manufacture of the concrete pile, the support plate for tension is eliminated and a reinforcement block for reinforcing the tip bearing capacity of the pile can be directly installed during the manufacture of the concrete pile, thereby reducing the construction time. The material required for this can be reduced. In addition, it is also easy to fix the position and installation of the reinforcement block weight by installing the position fixing projections.

200: concrete column 110: column connection
120: end surface 121: tension hole
130: formwork support surface 122: tapered surface
125: insertion hole 123: lower shoe plate
140: reinforcing band 20: tension member
60: lower mold 70: positioning fixing projections

Claims (19)

In the reinforcing block for the concrete pile to be bonded to the concrete column,
A pillar junction portion in contact with one end of the concrete pillar; And
A front end surface formed on an opposite surface of the column joined portion;
Including,
A tension hole is formed through the pillar junction and the front end surface,
In communication with the tension hole, the insertion hole is formed through the diameter formed larger than the tension hole is formed through,
The reinforcement block for the concrete pile is formed larger than the diameter of the concrete pillar,
The reinforcement block for the concrete pile is reinforced concrete block, characterized in that formed of a concrete material.
The method of claim 1,
Formwork support surface for supporting one end of the formwork used in the manufacture of the concrete pile is formed on the outside of the column joint portion,
The formwork support surface is a concrete pile reinforcement block, characterized in that formed to protrude relative to the column.
The method of claim 1,
The tension hole has a tapered surface having a smaller diameter toward the concrete pillar;
Reinforcement block for a concrete pile, comprising a.
delete The method of claim 2,
The tension hole has a tapered surface having a smaller diameter toward the concrete pillar;
Reinforcement block for a concrete pile, comprising a.
delete The method of claim 1,
Reinforcement block for a concrete pile, characterized in that the lower shoe plate is fixed to the front end surface.
The method of claim 1,
Reinforcing band surrounding the side of the reinforcement block for the concrete pile;
Reinforcement block for a concrete pile further comprising a.
delete delete Concrete pillars;
A reinforcing block coupled to one end of the concrete column, the outer diameter of which is larger than the outer diameter of the concrete column; And
Tension members for applying prestress in the longitudinal direction to the concrete columns and the reinforcing blocks;
Including,
The tension member penetrates the reinforcing block and is disposed in the longitudinal direction in the concrete column.
The tension member is fixed at one end to a front end surface opposite to the surface of the reinforcing block in contact with the concrete pillar,
The reinforcement block is a concrete pile, characterized in that formed of a concrete material.
The method of claim 11,
A lower shoe plate fixed to the front end surface;
Concrete file, characterized in that it further comprises.
The method of claim 11,
A reinforcing band coupled to surround the side of the reinforcing block;
Concrete file, characterized in that it further comprises.
delete 14. The method according to any one of claims 11 to 13,
An upper reinforcement block coupled to the other end of the concrete column, the outer diameter of which is larger than the outer diameter of the concrete column;
More,
The tension member is a concrete pile, characterized in that the other end is fixed to the opposite side of the surface in contact with the concrete pillar of the upper reinforcement block.
delete delete delete delete

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