KR101148815B1 - Composite pile connected inner connecting member and composite construction method using the same - Google Patents

Abstract

PURPOSE: A composite pile using an inner connector and a construction method thereof are provided to stably connect a steel pipe pile and a hollow concrete pile and to improve the strength of the connected part. CONSTITUTION: A composite pile(100) using an inner connector comprises a hollow concrete pile(110), a steel pipe pile(120), an inner connector(130), and a head reinforcing unit(140). The hollow concrete pile has a hollow head protection plate and reinforcing bands(112). The steel pipe pile is integrally connected to the head of the hollow concrete pile. The inner connector comprises an upper plate, a body plate, and studs. The body late is formed along the outer bottom surface of the upper plate. The studs are formed on the surfaces of the upper and body plates. The head reinforcing unit is installed on the top end of the steel pipe pile.

Description

Composite pile connected using inner connector and composite pile construction method {COMPOSITE PILE CONNECTED INNER CONNECTING MEMBER AND COMPOSITE CONSTRUCTION METHOD USING THE SAME}

The present invention relates to a composite pile connected using the inner connector and a composite pile construction method using the same. More specifically, in connecting the steel pipe pile and the hollow concrete pile to each other, it is possible to connect the steel pipe pile and the hollow concrete pile more stably by expanding the connection part by installing the inner connector, and to effectively load transfer and simply install the head reinforcement means. It relates to a composite pile connected by using the inner connector possible and a composite pile construction method using the same.

Looking at the conventional composite pile as follows.

In general, in order to install a predetermined floor structure on top of the ground, the ground must have sufficient bearing capacity for the load of the floor structure.

Soft ground is a ground that does not have sufficient bearing capacity in response to such ground conditions or load conditions of the flooring structure.

The soft ground should be prepared before the installation of the structural structure, and the countermeasures for stability and settlement of the structural material should be prepared before installation of the structural material. There is a piling method for charity construction.

The pile method refers to a method of constructing a hollow concrete pile or a steel pipe pile produced in a factory by hitting it with a diesel hammer or a hydraulic hammer or drilling a ground and then buying it.

The type of pile used in the pile construction method is selected in consideration of the load condition applied to the structure, seismic design, and other impact stress.In the current construction site, high-strength hollow concrete piles are commonly used, and Korean Industrial Standards (KS) According to the present invention, the compressive strength of concrete manufactured by applying centrifugal force is defined as a high strength hollow concrete pile (hereinafter referred to as “hollow concrete pile”) by a pretension method of 78.5 N / mm 2 (800 kgf / cm 2) or more.

On the other hand, in civil engineering sites such as roads and bridges, the load conditions are more complicated and diverse than those of buildings, and hollow concrete piles often do not satisfy the design conditions, and many steel pipe piles are used instead. This is specified in Korean Industrial Standard (KS).

In addition, the length of the pile can be selectively used according to the depth of the support ground, but the hollow concrete piles and steel pipe piles are made as ready-made products in the factory, and the hollow concrete piles and steel pipe piles are difficult to transport because the products over a certain length are difficult to transport. Is produced in a maximum length of 15m. However, many construction sites require pile lengths of several tens of meters exceeding 15m depending on the ground conditions.

Therefore, when the length of the pile to be installed exceeds a certain length, it is inevitable to connect two or more piles.

As a representative method of connecting two piles using a conventional pile joint device, in the case of hollow concrete piles, the upper and lower welding holes formed in the steel joint plate (hollow head protection plate) installed integrally with the pile at one end of the pile A construction method of butt welding a pile is used.

And, in the case of steel pipe pile, butt welding the upper and lower piles by using the welding groove formed in the end of the pile to face the pile and the pile.

By the way, the horizontal force and the moment applied to the pile due to the earthquake structure and earthquake, etc., has a maximum characteristic within about 10m from the ground surface.

Therefore, when the length of the pile is long because the depth to the supporting ground is long, the lower portion of the pile is relatively weak in flexural strength, but it is able to exert sufficient strength even with the hollow concrete pile with high compressive strength, while the upper portion near the ground surface is flexural strength. By using steel pipe piles with high compressive strength and sufficient strength.

As described above, piles having different kinds of upper and lower piles are called composite piles.

Conventionally, a welding joint method has been used to connect a composite pile as described above, and in recent years, a welding joint method has been used in addition to a welding joint.

1 is an exploded perspective view showing the connection structure between the steel pipe pile 2 and the hollow concrete pile 3 by the welding method according to the prior art of the prior art and the steel pipe pile 2 and the hollow concrete pile 3 according to the prior art It is a schematic cross-sectional perspective view showing the structure of the connection section in the connected state.

That is, the composite pile 1 according to the prior art, the lower portion is made of a hollow concrete pile (3) and the upper portion is made of a steel pipe pile (2), the steel pipe pile (2) and hollow concrete pile (3) Through the connecting portion having a structure such as to form an integral.

First, the hollow hollow head protection plate 31 made of steel of a predetermined thickness is integrally installed on the head of the hollow concrete pile 3. A reinforcing band 32 may be further provided on the hollow concrete pile 3 below the hollow head protection plate 31. A joint reinforcing member 4 is provided at the lower end of the steel pipe pile 2 connected to the head of the hollow concrete pile 3.

The joint reinforcing member 4 is a reinforcing plate 41 made of a circular steel material corresponding to the head shape of the hollow concrete pile (3), and one or more vertical ribs installed perpendicular to the reinforcing plate 41 ( 42).

The joint reinforcing member 4 including the reinforcing plate 41 and the vertical ribs 42 is welded in contact with the lower end of the steel pipe pile 2 in contact with the reinforcing plate 41, and the vertical ribs 42 are welded. Inserted into the inside of the steel pipe pile (2) is coupled to the lower end of the steel pipe pile (2) in the form of being in close contact with the inner surface of the steel pipe pile (2).

In addition, the joint reinforcing member 4 is also integrally coupled with the hollow head protection plate 31, the lower surface of the joint reinforcing member 4 is in close contact with the hollow head protection plate 31 of the hollow concrete pile (3) As the edge of the log is welded, the joint reinforcing member 4 and the hollow head protection plate 31 are firmly coupled.

However, in the case of the prior art, the hollow concrete pile 3 is welded to the steel pipe pile 2 to be bonded to each other, and thus the construction site is mandatory for the construction site. Increasing the time, there was also a problem such as the construction itself becomes difficult depending on the surrounding environment, such as bad weather.

In addition, the edge of the joint reinforcing member (4) is welded in the state that the edge is in close contact with the hollow head protection plate 31 of the hollow concrete pile (3), the joint reinforcing member (4) only by the edge welding ) And the hollow head protection plate 31, but there is a limit to the complete coupling there is a problem that it is not efficient in load transfer.

In addition, the quality control of the weld is very important, but there is a problem that it may be a cause of defects because it is not easy to check this on a real site.

In addition, it is effective that the composite pile is filled inside the concrete pile, that is, inside the steel pipe pile, so that the steel pipe pile and the concrete are synthesized with each other. There is a problem that it is difficult to install the stud on the inner side of the steel pipe pile and the concrete is not filled in the steel pipe because the blocking plate is not installed inside.

Therefore, the present invention is to connect the steel pipe pile and the hollow concrete pile, to more effectively induce the load transfer flow, to ensure a sufficient connection performance between the steel pipe pile and the hollow concrete pile, and the concrete and filled inside the steel pipe pile It is a technical task to solve the provision of a composite pile connection method that can sufficiently secure the synthesis capacity.

The present invention to achieve the above technical problem

First, in the connection part of the composite pile, the connection between the steel pipe pile and the hollow concrete pile is basically made by welding, but such a welding part is limited to only the edge of the connection part in the related art, but it is possible to expand the welding part of the connection part more clearly. The pile connection construction was made possible.

To this end, the present invention uses an inner connector formed on the connecting portion, including an upper plate formed of a top plate, and a trunk plate of a lower beam cross-section having a larger diameter from both side ends of the upper plate downward, wherein the trunk plate is hollow concrete. Connection between the steel pipe pile and the hollow concrete pile by welding to the hollow inner upper surface (B) of the hollow head protection plate formed on the top of the pile, and the lower end of the steel pipe pile to the edge welded to the outer upper surface (A) of the hollow head protection plate of the hollow concrete pile The performance was secured enough.

In addition, a fastening hole communicating with a through hole formed in the hollow head protection plate is further formed on the upper surface of the hollow concrete pile to install a connection stud fastened to the through hole and the fastening hole, and the connection stud is embedded in concrete.

The steel pipe pile and hollow concrete pile according to the present invention

The head protection plate of the steel pipe pile and the hollow concrete pile is more effective by the joint connection (connection 1) in addition to the joint connection (connection 1) in addition to the welding connection (connection 2) by the inner connector and the composite connection (connection 3) with the concrete by the connection stud. It is possible to secure connection performance (expansion of connecting parts).

Second, since the hollow part of the hollow concrete pile is closed by the inner connector, it is easy to fill the concrete inside the steel pipe pile, and a number of studs on the inner connector surface can easily facilitate the synthesis of the steel pipe pile and the concrete. It was formed so that the integration of the steel pipe pile and the internal connector can be made sufficiently.

As a result, the composite pile according to the present invention can more effectively secure the integrity of the steel pipe pile and the hollow concrete pile by the stud formed on the inner connector and the connection stud formed on the head protection plate of the hollow concrete pile.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

According to the present invention, in installing the connection part of the conventional steel pipe pile and the hollow concrete pile, it is possible to reduce the inconvenience of welding a plurality of vertical ribs by using the conventional joint reinforcing member, and dramatically increase the performance of the connection part. And it is easy to install the head reinforcement means, it becomes very easy to control the quality of the construction of the composite pile.

1 is an exploded perspective view and a cross-sectional perspective view of a connection part of a conventional composite pile,
Figure 2a is an exploded perspective view of a composite pile according to the present invention,
Figure 2b is a combined perspective view of the composite pile according to the present invention,
Figure 2c is a perspective view and a cross-sectional view of the steel pipe pile used in the present invention,
Figure 2d is a perspective view of the connection portion of the steel pipe pile and hollow concrete pile of the present invention,
3a, 3b and 3c is a construction sequence diagram of the steel pipe pile of the present invention,
4a is a perspective view and a cross-sectional view of another steel pipe pile used in the present invention,
Figure 4b is an exploded perspective view of the connection portion of the steel pipe pile and hollow concrete pile according to Figure 4a.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Composite pile of the present invention can be divided into Example 1 and Example 2.

The difference between Example 1 and Example 2 is distinguished due to the difference in the steel pipe pile, the steel pipe pile according to Example 1 to prevent the reinforcing steel bars in the concrete filled inside, whereas the steel pipe pile according to Example 2 There is a difference in that the reinforced steel assembly network 125 is installed inside the concrete 121 to be filled in the steel pipe pile is formed in a reinforced concrete structure.

<Compound Pile according to Example 1>

[Composite Pile (100)]

2a and 2b is an exploded perspective view and a combined perspective view of the composite pile of the present invention.

Composite pile 100 of the present invention comprises a hollow concrete pile 110, steel pipe pile 120, the inner connector 130 and the head reinforcing means 140, as shown in Figure 2a and 2b.

First, the hollow concrete pile 110 is a high-strength hollow concrete pile (PHC pile) by a pretension method manufactured by applying centrifugal force.

The hollow concrete pile 110 is manufactured in the form of a hollow pile and the head is integrally provided with a circular hollow head protection plate 111 made of steel of a predetermined thickness and the reinforcing band 112 below the hollow head protection plate 111. ) Is further provided.

The hollow concrete pile 110 is manufactured so that the hollow head protection plate 111 and the reinforcing band 112 is integrally formed on the head of the hollow concrete pile 110 in the factory and is usually in the form of a circular hollow pile in the center of the hollow portion (S). ) Is formed.

In addition, the hollow head protection plate 111 has a through hole 113 formed therein, and a fastening hole 115 having a sleeve (not shown) having a threaded portion formed on an upper surface of the head of the hollow concrete pile 110 is formed. The connection stud 114 is connected to the fastening hole 115 by communicating with the 113.

That is, the connection stud 114 formed in the hollow concrete pile is embedded in the concrete 121 filled in the steel pipe pile 120, as shown in Figure 2b so as to more effectively secure the integrity of the steel pipe pile and the hollow concrete pile Done.

The steel pipe pile 120 is manufactured to include a steel pipe 122 having a predetermined diameter as being integrally connected to the head of the hollow concrete pile 110 as shown in Figures 2a, 2b and 2c.

The lower end of the steel pipe pile 120 is in contact with the outer upper surface (A) of the hollow head protection plate 111 of the hollow concrete pile 110 by the hollow concrete pile 110 by the edge welding (connection 1). And are connected to each other.

In addition, the head reinforcing means 140 of the composite pile is installed at the upper end of the steel pipe pile.

The head reinforcement means 140 is installed in the upper end of the steel pipe pile 120, the upper and lower spaced up and down reinforcing plate (141,144) spaced up and down.

Through-holes 142 and 145 are formed in the upper and lower reinforcing plates 141 and 144 so that the head reinforcing bars 143 to be described later are installed therethrough.

In addition, the head reinforcement 143 is installed so that the upper end is extended upward through the through holes (142, 145), the lower end is extended to the lower portion of the lower reinforcing plate 144.

By the head reinforcing reinforcing bars 143, the composite pile 100 is connected to each other and the foundation formed on the composite pile to ensure the integrity.

The head reinforcing bar 143 is a composite reinforcing strip (not shown) installed on the outer surface of the head reinforcing bar 143 while being easily inserted and mounted in the through holes 142 and 145 so that the middle part is bent. It is desirable to be equal to or larger than the diameter of P, to be advantageous for securing integrity.

In addition, the concrete 121 is filled in the steel pipe pile 120, as shown in Figure 2b.

That is, it is filled in the inner space of the steel pipe pile formed by the inner connector 130 and the steel pipe pile 120, such that the concrete 121 and the steel pipe pile 120 are synthesized with each other to be integrated (synthetic connection).

To this end, in the present invention, the connection stud 114 described above is synthesized with the concrete 121 so that the hollow concrete pile and the steel pipe pile can be effectively integrated with each other.

Furthermore, the present invention is to install the inner connector 130, the inner connector 130 is connected to the composite pile as shown in Figures 2a, 2b and 2d

And to expand the welded portion of the steel pipe pile 120 and hollow concrete pile 110 and

The concrete 121 is filled inside the steel pipe pile to prevent falling into the hollow portion of the hollow concrete pile and

The load transmitted to the steel pipe pile has a function to smoothly guide the hollow concrete pile.

To this end, the inner connector 130 is formed to include a top plate 131 and the body plate 132 as shown in Figure 2d.

The upper plate 131 is a circular plate having a predetermined diameter and is formed to be smaller than the diameter of the hollow portion S of the hollow concrete pile 110.

This is to ensure that the transmitted load is inclined downward to the head protection plate on both sides of the upper plate.

The body plate 132 is formed of a cylindrical plate that is larger in diameter downward along the outer circumferential bottom surface of the upper plate 131.

Accordingly, it can be seen that the inner connector 130 is formed in the form of a funnel with a lower diameter, that is, a lower diameter and a larger diameter.

Thus, the inner connector 130 is connected to the hollow inner upper surface (B) of the hollow head protection plate 111 by welding, it can be seen that it is installed to protrude upward inside the steel pipe pile.

Thus, the lower end of the body plate 132 is to be welded to the hollow inner upper surface (B) of the hollow head protection plate 111 of the hollow concrete pile, so that the inner connector 130 is installed on the top of the hollow concrete pile 110 It can be seen that.

In addition, it can be seen that a plurality of studs 133 are formed on the surfaces of the upper plate 131 and the trunk plate 132 to facilitate synthesis with the concrete 121.

As a result, the steel pipe pile and the hollow concrete pile are connected together with the connection 1 by edge welding.

It can be seen that more efficient pile connection is possible through the expansion of the connection part by connection 2 by welding the steel pipe pile and the hollow concrete pile by the inner connector.

It can be seen that the connection 3 allows the steel pipe pile and the hollow concrete pile to be integrated with each other by the connecting stud and the concrete, thereby securing more effective connection performance between the steel pipe pile and the hollow concrete pile due to the expansion of the connecting portion.

That is, when the concrete 121 is filled in the steel pipe pile, the concrete 121 is integrated by the inner connector 130 and the stud 133, and the inner connector 130 is the hollow head protection plate of the hollow concrete pile 110 and Since the steel pipe pile of the present invention is welded by the concrete 121 and the inner connector 130, the welded portion can be more reliably connected with the hollow concrete pile 110 because it is welded.

The inner connector 130 is installed in the factory by welding in advance in the hollow head protection plate 111 of the hollow concrete pile 110, the hollow head protection plate of the steel pipe pile and the hollow concrete pile to be connected by welding in the field. do.

Such composite pile 100 is connected to each other as shown in Figure 2b is produced as a composite pile 100 having a predetermined length.

Accordingly, the lower end of the composite pile 100 of the present invention is formed of a hollow concrete pile 110 and the steel pipe pile 120 is hollow concrete pile 110 by the inner connector 130 and the conventional edge welding of the present invention. It can be seen that it is connected to, and the head reinforcing means 140 including the head reinforcing reinforcing bars 143 is formed on the upper end of the steel pipe pile.

[Construction method using composite pile (100)]

The composite pile construction method using the composite pile 100 connected by using the inner connector 130 will be described with reference to FIGS. 3A to 3C.

First, as shown in FIG. 3a, the composite pile 100 of the present invention may be formed by forming a boring hole in the ground, inserting the composite pile into the boring hole, and filling the mortar between the boring hole and the composite pile. .

That is, first, the composite pile 100 is previously manufactured integrally with the hollow concrete pile 110 and the inner connector 130 as shown in Figure 3a.

This is done in advance in the factory, the inner connector 130 is simply made by welding (connection 2) to the hollow inner upper surface (B) of the hollow head protection plate 111 of the hollow concrete pile.

Next, as shown in FIG. 3b, the hollow concrete pile 110 integrated with the inner connector 130 is brought into the field to weld the steel pipe pile 120 to the outer upper surface A of the hollow head protection plate of the hollow concrete pile. By integration (connection 1).

That is, the lower end of the steel pipe pile by welding (border welding) to the outer upper surface (A) of the hollow head protection plate of the hollow concrete pile to connect the steel pipe pile to the hollow concrete pile.

Thus, as shown in FIG. 3b, the composite pile 100 of the present invention is inserted into the drilling hole in which the composite pile 100 is formed in the ground.

The extension length of the composite pile can be changed in various ways. Preferably, the section in which the moment acts largely from the ground surface is preferably arranged so that the steel pipe piles are arranged. It is preferred to be arranged.

Next, put mortar in the space between the drilled hole and the compound pile and set it in the drilled hole of the compound pile.

By filling the concrete 121 inside the steel pipe pile of the composite pile constructed in the ground so that the steel pipe pile 120 and the hollow concrete pile 110 by the concrete 121 is integrated with each other (connection 3).

The concrete 121 is not leaked to the hollow portion of the hollow concrete pile by the inner connector 130.

Next, the two reinforcing means 140 of the present invention is installed on the composite pile 100.

When the construction of the composite pile 100 is completed, the foundation concrete is placed on the upper portion so that the foundation 200 and the composite pile 100 are integrated.

As a result, the load transmitted from the foundation portion is transmitted to the steel pipe pile 120 of the composite pile, and the load by the inner connector 130 is distributed radially to the upper portion of the hollow concrete pile and is effectively transmitted to the ground through the final composite pile. Can be.

<Compound Pile according to Example 2>

In the composite pile according to the second embodiment, the shear connector 123 and the reinforcing bar assembly 125 installed on the connection plate are further installed inside the steel pipe pile 120 to be used, thereby more reliably synthesizing the concrete 121 and the steel pipe pile. While ensuring securely, it is to effectively increase the rigidity of the steel pipe pile 120 by the reinforcing bar assembling network.

In addition, the connection construction, construction method by the connection 1,2,3 of the steel pipe pile 120 and the hollow concrete pile 110 described above is the same as in Example 1.

Thus, the connection configuration between the steel pipe pile 120 used in Example 2 and the steel pipe pile and the hollow concrete pile according to FIG. 4B will be described below with reference to FIG. 4A.

First, looking at the shear connector and the reinforcing bar assembly network is installed on the steel pipe pile 120 as follows.

That is, as shown in FIG. 4a, a connecting plate 124 having a truss-shaped shear connecting member 123 is pre-installed on the inner surface of the steel pipe 122 constituting the steel pipe pile 120, and contacting the shear connecting member of the connecting plate. While the steel plate 122 is inserted into the reinforced steel assembly network 125 is installed so that the shear connecting member 123 is formed in the state in which the connecting plate 124 and the prefabricated reinforcing network 125 is installed in the concrete (121) ) Will be poured.

At this time, the truss muscle shear connector 123 is

A lower truss root 123a spaced apart from each other on one side of the connecting plate 124 and extending in the longitudinal direction of the steel pipe 122;

An upper truss root (123b) formed at a central upper portion between the lower truss roots (123a) and disposed to extend in a longitudinal direction of the steel pipe (122); And

With the upper truss root 123b as a vertex, the lower truss root 123a and the upper truss root 123b extend in a corrugated shape in the longitudinal direction of the steel pipe 122 to form the upper truss root and two lower truss roots. Including; truss bars 123c including corrugated bars that constrain each other;

The shape of the shear connecting member formed by the two lower truss roots 123a and the upper truss roots 123b is used to form a triangular truss as a whole.

As a result, the steel pipe pile 120 has the connection plate 124, the truss-shaped shear connector 123, and the reinforcing bar assembly 125 to be embedded in the concrete 121, thereby increasing the rigidity of the steel pipe pile. Can be.

In addition, according to Figure 4b can be confirmed the excerpt perspective view of the connection between the steel pipe pile and the hollow concrete pile according to Example 2,

It can be seen that the connecting plate 124, the truss-type shear connecting member 123, the reinforcing bar assembly 125 is effectively embedded by the concrete 121 can effectively enhance the connection site reinforcement effect.

In addition, the connection stud 114 can be further extended upwards to more reliably exhibit the integration with the concrete.

100: composite pile of the present invention
110: hollow concrete pile 111: hollow head protection plate
112: reinforcing band 113: through hole
114: connection stud 115: fastening hole
120: steel pipe pile
121: concrete 122: steel pipe
123: shear connector
123a: lower truss muscle 123b: upper truss muscle
123c: waveform truss muscle
124: connecting plate
130: inner connector
131: top plate 132: body plate
133: stud
140: tofu reinforcement means
141: upper reinforcing plate 142,145: through hole
143: tofu reinforcement
200: foundation

Claims (8)

Steel pipe pile 120 connected by welding to the outer upper surface (A) of the hollow head protection plate 111 formed on the hollow concrete pile 110; A lower end connected to the hollow outer upper surface B of the hollow head protection plate 111 by welding and installed to protrude upwards inside the steel pipe pile, the inner connector 130 installed to block the hollow of the hollow concrete pile 110; And a concrete 121 filled in the inner space of the steel pipe pile formed by the inner connector 130 and the steel pipe pile 120.
The inner connector 130 is a circular plate top plate 131 formed to be smaller than the diameter of the hollow portion (S) of the hollow concrete pile 110; A cylindrical plate 132 having a diameter smaller as it descends downward along the outer bottom surface of the upper plate 131 and connected to the lower outer surface of the hollow head protection plate 111 by welding; And a stud 133 formed on the surfaces of the upper plate 131 and the body plate 132. The method of claim 1, wherein the hollow head protection plate 111 is
The fastening hole 115 communicated with the through hole 113 formed in the hollow head protection plate 111 is further formed on the upper surface of the hollow concrete pile 110 to be fastened to the through hole 113 and the fastening hole 115. The connection stud 114 is to be installed, the connection stud 114 is connected to the composite pile using the inner connector, characterized in that to be embedded in the concrete (121). delete According to claim 1, wherein the head reinforcing means 140 of the composite pile can be installed on the upper end of the steel pipe pile 120, the head reinforcing means 140 is
Steel pipe piles 120 and the upper and lower reinforcing plate spaced up and down in the form of a circular ring formed inside the upper end portion (141, 144);
Through-holes 142 and 145 formed in the upper and lower reinforcing plates 141 and 144, respectively; And
Through the through holes 142 and 145, the upper end is extended upward, and the lower reinforcement reinforcing bar 143 is installed to extend to the lower portion of the lower reinforcing plate 144: connected using an inner connector characterized in that it comprises a Composite pile. The hollow concrete pile 110 is connected to the hollow outer upper surface (B) of the hollow head protection plate 111 formed on the hollow concrete pile 110 by welding and the inner connector 130 is installed to protrude upwards inside the steel pipe pile. Ready,
After importing the hollow concrete pile 110, the inner connector 130 is installed on the site and welds the steel pipe pile 120 by the edge welding to the outer upper surface (B) of the hollow head protection plate 111 composite pile (100) ),
Install the composite pile 100 on the ground,
Filling the concrete 121 in the steel pipe pile 120,
The inner connector 130 is a circular plate top plate 131 formed to be smaller than the diameter of the hollow portion (S) of the hollow concrete pile 110; A cylindrical plate 132 having a diameter smaller as it descends downward along the outer bottom surface of the upper plate 131 and connected to the lower outer surface of the hollow head protection plate 111 by welding; And a stud 133 formed on the surface of the upper plate 131 and the body plate 132. The method of claim 5, wherein the hollow head protection plate 111 is
The fastening hole 115 communicated with the through hole 113 formed in the hollow head protection plate 111 is further formed on the upper surface of the hollow concrete pile 110 to be fastened to the through hole 113 and the fastening hole 115. Connection stud 114 is to be installed, the connection stud 114 is a composite pile construction method using a composite pile connected by using the inner connector, characterized in that to be embedded in the filled concrete 121. delete According to claim 5, wherein the head reinforcing means 140 of the composite pile can be installed on the upper end of the steel pipe pile 120, the head reinforcing means 140 is
Steel pipe piles 120 and the upper and lower reinforcing plate spaced up and down in the form of a circular ring formed inside the upper end portion (141, 144);
Through-holes 142 and 145 formed in the upper and lower reinforcing plates 141 and 144, respectively; And
Through the through holes 142 and 145, the upper end is extended upward, and the lower reinforcement reinforcing bar 143 is installed to extend to the lower portion of the lower reinforcing plate 144: connected using an inner connector characterized in that it comprises a Composite pile construction method using composite pile.

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