WO2010147306A2

WO2010147306A2 - Synthetic phc pile, production method of synthetic phc pile and construction process of synthetic phc pile

Info

Publication number: WO2010147306A2
Application number: PCT/KR2010/002978
Authority: WO
Inventors: 이승수
Original assignee: (주)하경엔지니어링
Priority date: 2009-06-19
Filing date: 2010-05-11
Publication date: 2010-12-23
Also published as: KR100999020B1; WO2010147306A3

Abstract

The present invention can effectively improve the structural performance of a pile while maximizing the merits of PHC piles, produce piles by using the conventional PHC pile manufacturing equipment per se, facilitate the construction thereof and employ a head bolt means, thereby enabling very economical production and construction processes of synthetic PHC piles. The synthetic PHC pile comprises, in the PHC pile, a shear connector including a horizontal steel bar, which is installed in such a manner that it extends to a hollow portion (S) of the PHC pile and is then exposed; and a hollow concrete portion, which is formed by filling the hollow portion (S) of the PHC pile with hollow concrete to make the exposed shear connector embedded and synthesized.

Description

Manufacturing method of synthetic PI seed pile, manufacturing method of synthetic PI seed pile and construction method of synthetic PI seed pile

The present invention relates to a synthetic P. C. pile, a manufacturing method thereof and a method for constructing a synthetic P. C. pile using the same. More specifically, the synthetic PH which effectively improves the structural performance of the P. H. pile (deflection, compression, and shear resistance) while securing the economics, which is an advantage of the Pretensioned Spun High Strength Concrete Pile. It is about seed pile, the manufacturing method and the construction method.

Conventionally, pile foundations for structures used as a deep foundation can be largely divided into steel pipe piles and P. H. piles (pretensioned centrifugal force high strength concrete piles),

In the case of these piles based on the same diameter, there is no significant difference in terms of tip bearing capacity,

In particular, the resistance to bending or shearing is largely different in the piles, and the application of the resistance has to be decided depending on which resistance should be given priority as pile foundation.

That is, there is no problem in applying the PI pile because it is not only economically superior in the structure which has a greater influence of the vertical force than the steel pipe pile, but also has a comparative advantage in terms of constructability.

In structures with large influences of horizontal force (shear force) and bending moments such as earth pressure and seismic loads, P. H. piles have a small resistance to them, which inevitably requires the use of relatively expensive steel pipe piles.

Accordingly, in order to improve the structural performance of the P. H pile 10, the reinforcing bar 20 is inserted into the hollow part S of the hollow concrete pile part 11 to a predetermined depth, and the hollow part S The synthetic PI seed piles filled with hollow concrete 30 has been introduced.

That is, by filling the hollow portion (S) with concrete to further extend the support cross-section of the P. H. pile, this enlarged support cross-section is formed by the reinforced concrete body (20,30) by the reinforcing bar 20, the entire P. H. The structural performance of the pile is improved.

However, the flexural stiffness can be sufficiently secured in the case of such synthetic P. H. piles. There was a problem exceeding.

That is, although the ability to resist bending, compression, and shear forces is greater than that of the conventional P. H. pile, the support section formed of the reinforced

concrete bodies

20 and 30 has a relatively high resistance to shear force based on the improved bending stiffness. As a result, the resistance to shear forces acted as a factor for determining whether the synthetic P. C. pile was utilized.

In this regard, a method of additionally installing the rebar 20 in the hollow part to improve the resistance to the shear force may be considered, but the rebar 20 is substantially filled even when the installation amount of the rebar 20 is increased. It is only to reinforce the hollow concrete, and not to be integrated with the hollow concrete pile portion 11, there was a limit in improving the shear resistance capacity.

In addition, Fig. 2 shows a conventional head reinforcing means for integrally coupling the constructed PI seed pile 10 and the foundation structure concrete 40 of the structure, which in turn is the foundation structure in the hollow portion of the PI pile 10 It can be seen that the reinforcing bar 50 is disposed for coupling with concrete, and the filling concrete 60 is filled in the hollow so that the reinforcing bar 50 can be fixed.

The present invention is to solve the problems of the prior art, the object of the present invention is a synthetic P. H. pile, which is economical, such as a P. C. pile, easy to manufacture and excellent in the structural performance against the working load, in particular resistance to shear force It is to provide a means to improve the ability efficiently.

It is another object of the present invention to provide a method for constructing a synthetic P. C. pile more effectively by simultaneously providing a head reinforcing means for combining with the concrete of the basic structure as a synthetic P. C. pile.

Still another object of the present invention is to make it easy to connect the synthetic P. H. pile and the simple P. H. pile so that the length of the extension can be easily adjusted so that the synthetic P. H. pile is at a depth where a large horizontal force such as an earthquake load is applied. It can be constructed, and at a depth below that, it can be connected to a simple PI stake so that a more economical PI pile can be constructed.

The present invention to achieve the above technical problem

First, while the structural performance of the pile conventionally possessed by the PI piles to be used as it is, the steel rods and spiral reinforcing rods and spiral reinforcement used in the manufacture of the PI piles in order to improve the structural performance of the pile simple and economical In the same internal reinforcing material to further form a shear connector exposed to protrude into the hollow portion (S), this shear connector is to be integrated with the hollow concrete to be filled in the hollow portion (S) in the field, P The hollow concrete pile portion of the pile and the hollow concrete portion by the hollow concrete is to resist external force to the integrated cross section.

This is to form a reinforced concrete body (20,30) separately in the hollow portion (S) of the conventional PI seed pile to expand only the support cross-section of the PI pile, the expanded support cross section hollow concrete of the PI pile It is to be completely integrated by the pile and the shear connector of the present invention, so that the resistance to bending, compression and shear force due to the enlarged support cross section can be improved together.

Furthermore, the shear connector is to be added to the conventional reinforcement when the pile piles, and with the arrangement of the internal reinforcement to improve the economics and workability.

Second, since the necessity of the head reinforcement to be combined integrally with the concrete structure of the concrete PI seed of the present invention will naturally have a reinforcing bar, etc. to act as a flexural reinforcement to the hollow concrete part, The upper end was projected upward of the synthetic PI seed pile, and the protruding flexural reinforcement was bound to each other with the internal reinforcement of the foundation structure concrete so that the head reinforcing means could be provided at the same time.

Third, the PA pile is usually made to have a certain length because of the limitation of manufacturing and transport, it will have a length of about 10 ~ 15M. However, if a pile of PI seeds having a longer length as a pile is needed, the PI piles are connected to each other. For this purpose, the connection steel is formed at the lower end of the PI pile to allow connection by welding.

Accordingly, the present invention also allows the P. H. pile to be connected to the bottom of the synthetic P. S. pile as it is, so that the need for extension of the length is satisfied. That is, the synthetic PI seed pile of the present invention has a large external force, so that the site requiring synthesis can be formed using the synthetic PI seed pile and other portions can be formed as a simple PI seed pile, thereby improving its utility. .

Synthetic P. H. pile according to the present invention can secure the economical efficiency of the simple P. H. pile as it is, while simply forming a shear connector in the required portion, the hollow concrete filled in the hollow by the shear connector is a simple P It is possible to secure structural performance of structurally highly efficient piles by making it integrated with hollow concrete piles of H. H. piles so that the resistance to bending moments and compressive forces due to working loads is improved and the resistance against shear forces is also improved. It was made.

In addition, it is possible to reduce the production cost by using the conventional manufacturing facilities of the PI seed pile as it is to produce a synthetic PI seed pile, it is also easy to manufacture and quality control can be very easy.

In addition, such flexural reinforcement can be additionally secured, such as flexural reinforcement, and the flexural reinforcement can be used as a head reinforcement to secure sufficient connection with the foundation structure concrete. It can be fixed in a rigid state while being able to effectively resist drawing.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. Those skilled in the art of the present invention can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Figures 1 and 2 show the conventional concrete filled P. C pile and its head reinforcing means.

3, 4 and 5 illustrate the manufacturing work of the synthetic P. C. pile according to the present invention.

6 and 7 are a perspective view and a coupling perspective view of the internal reinforcing material and shear connector of the synthetic P. C. pile according to the present invention.

8 is a completed state of the synthetic P. C. pile according to the present invention.

Figure 9 shows the construction sequence diagram of the synthetic P. C. pile of the present invention.

10 is a cross-sectional view of embodiments of the shear connector of the present invention.

100: Synthetic PI stake pile 110: Hollow concrete pile

120: internal reinforcing material 121: steel bar

122: spiral reinforcement 130: shear connector

141: hollow concrete 140: hollow concrete

150: bending reinforcement 200: mold

400: ground 410: drilling hole

500: foundation concrete

The present invention is a high-strength hollow pile (P. H. pile) by a pretension comprising a hollow concrete pile portion formed with an internal reinforcing material including a steel rod and a spiral reinforcing bar, the hollow of the P. H. pile from the inside of the hollow concrete pile Shear connector including a reinforcing bar installed to extend to expose the portion (S); It provides a synthetic P. H. pile including a; hollow hollow portion formed by filling the hollow portion (S) of the P. H. pile pile hollow so that the exposed shear connector is embedded.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

First, the present invention is a high-strength hollow pile (hereinafter referred to as P. H. pile) by a pretension made of a hollow concrete pile portion 110 formed with an internal reinforcing material 120 including a steel bar 121 and the spiral reinforcement 122 Synthetic PI seed pile 100 produced as a reference.

Thus, the synthetic P. H. pile 100 of the present invention is basically installed by using the production equipment of high-strength hollow pile (P. H. pile, hollow concrete pile) by pretension as it is installed shear connector 130 to be described later Do not have a separate facility for this purpose.

That is, it may be possible to produce a synthetic P. C. pile 100 of the present invention using a separate facility, etc., but this may lead to an increase in the pile manufacturing cost, so that the conventional hollow concrete pile manufacturing equipment is used as it is.

In the present invention will also be described on the basis of the PA seed pile production equipment.

Thus, as shown in Figure 3, first placed the mold 200 for the PI Mr. stake piles not shown,

The internal reinforcing material 120 is disposed on the side surface of the mold 200. The internal reinforcing material 120 is a steel rod 121 and the spiral reinforcement 122 used in the conventional P. H. pile.

The steel rods 121 are installed using a steel rod 121 and a plurality of spaced apart from each other along the mold 200, so that the tension (length direction) is introduced.

The spiral reinforcement 122 is a reinforcing bar that is installed while enclosing the steel bar 121 in a spiral form as reinforcing bars that bind a plurality of spaced apart steel bars 121.

Since the steel rods 121 and the spiral reinforcement 122 are embedded in the hollow concrete pile portion 110 to be described later, they are referred to as internal reinforcement 120, and are intended to form the hollow concrete pile portion as PC concrete (PC CONCETE). By the function of reinforcing concrete will be named the reinforcement.

Next, the shear connecting member 130 of the present invention is installed as shown in FIG. 6 so as to extend and protrude toward the hollow portion S of the PI pile while surrounding the internal reinforcement member 120. For example, the steel bar 121 and the spiral reinforcement 122 are wrapped in the form of a rectangular ring-shaped closed reinforcing bar so as to cross each other so as to be installed in the transverse direction in the internal reinforcement 12 in a cross shape.

The shear connection member 130 is installed a plurality of predetermined distances to the internal reinforcing material 120, this installation section may be determined in consideration of the reinforcement section of the synthetic P. C. piles later.

For example, in the state of being installed on the ground of the synthetic P. C. pile, roughly 3 ~ 7M within the ground surface is the section most susceptible to the horizontal force due to earth pressure and earthquake load, so that the shear connector 130 may be installed in accordance with this section.

At this time, the shear connecting member 130 is referred to in that it is to synthesize the PI seed pile and the hollow concrete pile portion of the material other than being formed so as to extend to protrude toward the hollow portion (S) of the PI seed pile. The installation form is not otherwise limited and falls within the technical scope of the present invention.

After placing the internal reinforcing material 120 and the shear connector 130 in the mold 200 as above, the concrete for concrete pile portion 111 is injected into the mold 200, such concrete concrete for the pile pile 111 Will constitute the hollow concrete pile portion 110 itself.

Next, as shown in FIG. 4, the hollow concrete pile portion 111 injected by centrifugal force may be formed to have a predetermined thickness from the inner surface of the mold 200 by rotating the mold 200. When the pile concrete 111 is hardened, the hollow concrete pile portion 110 may be naturally produced in the form of a hollow tube.

Next, after the hollow concrete pile portion concrete 111 is hardened to form the hollow concrete pile portion 110, the mold P 200 according to the present invention is demolished as shown in FIG. 5 by deforming the mold 200. Production can be completed at the factory.

Such synthetic P. H. pile 100 has the same diameter as the conventional P. H. pile, as seen from the outside as shown in Figure 7, but a portion of the shear connector 130 is exposed in the hollow portion (S) It can be seen.

Therefore, it can be seen that it is possible to manufacture, transport and construct the synthetic P. C. pile of the present invention without the need for any additional equipment and tools in the manufacture and transportation thereof, as in the conventional P. C. pile.

Furthermore, the conventional PI seed pile further includes a connecting means 160 such as a steel ring in order to increase the extension length thereof, and the connecting means 160 has the synthetic PI seed pile of the present invention as it is. This makes it possible to connect other PICH piles as well as other synthetic PPC seeds.

As a result, it can be seen that it is possible to connect the other PI seed pile by using the connecting means 160 at the bottom of the synthetic PI seed pile of the present invention in order to meet the predetermined extension length, so that the advantages of the conventional PI seed pile It can be used as it is.

Accordingly, the coupling relationship of the configuration of the synthetic P. C. pile 100 of the present invention will be described with reference to FIG. 8. first,

In the PI seed pile comprising a hollow concrete pile portion 110 formed with an internal reinforcing material including a steel bar and a spiral reinforcement having a predetermined length (H),

It can be seen that the shear connector 130 including a transverse reinforcement is installed so as to extend from the hollow concrete pile portion 110 to the hollow portion S of the P. H. pile.

The shear connector 130 has a predetermined interval, but it can be seen that a number is installed in a section that requires reinforcement, which is to be formed within approximately 3 ~ 7M from the ground surface in the conventional P. C pile.

However, the shear connector 130 may be formed over the entire extension length of the PI file.

As such, the P. H. pile to which the shear connector 130 is added is manufactured using a P. H. pile manufacturing facility in a factory, and is brought into the final site and constructed as a synthetic P. H. pile.

A hollow concrete part 140 is formed by filling the hollow part concrete 141 in the hollow part S of the P. H. pile so that the exposed shear connector 130 is embedded and synthesized.

The hollow concrete portion 140 is formed in the entire hollow portion (S) if there are no other constraints.

As a result, it can be seen that the synthetic PI seed pile of the present invention allows the hollow concrete pile part 110 and the hollow concrete part 140 to be completely structurally integrated with each other by the shear connecting member 130, thereby synthesizing the present invention. The PI seed pile is supported by the cross-sectional area as large as the cross section of the hollow concrete portion 140, and the support for the increased resistance to shear force by the integrated hollow concrete pile portion 110 and hollow concrete portion 140 It is possible to secure the pile performance by the improved shear resistance ability to the cross section.

Therefore, the hollow concrete part filled with the hollow part of the conventional P. H. pile without the shear connecting member 130 is separated from the hollow concrete pile part 110 and acts independently, thereby structurally simply sharing the load according to the stiffness, thereby resisting each shear force. While it is possible to ensure the ability, the synthetic P. H. pile of the present invention is the hollow concrete part and the hollow concrete pile part is completely integrated by the shear connection member 130, so that each member behaves and resists at the same time to the external force is more improved It can be seen that to ensure the ability to resist shear forces.

This difference can be said to be the difference between the new concrete that is placed in contact with the existing concrete simply formed to be in contact only, and the new synthetic concrete integrated with each other by the internal reinforcement and the fixed shear connector 130 of the existing concrete.

Further, before filling the hollow part concrete 141 in the hollow part S, a bending reinforcement 150 may be further installed in the hollow part S, and the bending reinforcement 150 may be reinforced in FIG. 1. The configuration is similar to that of (20).

The flexural reinforcement 150 is to have a variety of extension length depending on the depth of the hollow concrete 141 is filled, preferably to be additionally installed in the section in which the shear connector 130 is installed, the upper end of the composite Make it protrude upwards from the top of the PI seed pile.

The upper end of the flexural stiffener 150 protruding upwards can be seen to function as a kind of head reinforcing means by binding to the internal reinforcing bars 510 preset in the foundation concrete 500.

Therefore, the present invention enables the installation of the head reinforcement means naturally when the construction of the synthetic P. C. pile can be seen that the construction of the synthetic P. C. pile can be very efficient.

Figure 9 shows the construction sequence of the synthetic P. C. pile by the perforation of the present invention. Of course, it is possible to construct by driving.

That is, first, the drilling hole 410 is formed using the drilling machine in the ground 400.

One such perforation hole is shown, but many may be formed adjacent to each other according to the synthetic PSI pile design.

Thus, the construction by the synthetic PI seed pile of the present invention, if necessary, the upper portion is formed by the synthetic PI seed pile according to the present invention, and the remaining portions thereof may be connected to each other by the PI seed pile, and only FIG. 9. In the following, we will consider the case where only synthetic PI seeds are used.

When the formation of the drilling hole 410 is completed as described above, the synthetic P. H. pile 100 is inserted into the drilling hole 410.

When the insertion of the synthetic PI seed pile by drilling or driving is completed, the hollow portion concrete 141 is filled in the hollow portion S of the synthetic PI seed pile 100 as described above.

Before the filling of the hollow concrete 151, the bending reinforcement 150 may be installed in the drilling hole S. The bending reinforcing member 150 may also have the entire depth of the drilling hole S or the shear connecting member 130. It is to be installed in the section, but the upper end is set so as to project upwards a certain height from the top of the synthetic PI seed pile.

When the hollow portion concrete 141 is filled in the hollow portion (S) and cured, the construction of the synthetic PI seed pile of the present invention is completed.

Therefore, based on the ground 400, the shear connector installation position of the synthetic P. C. pile is approximately 3-7M from the upper surface of the ground, and the horizontal and bending loads such as the earthquake load are the largest in this section. It can be seen that the pile resistance can be effectively obtained.

As such, when the construction of the final synthetic PI seed pile is completed, the foundation concrete 500 is poured. Before the foundation concrete 500 is poured, the bending reinforcement 150 of the synthetic PI seed pile protruded upwards in advance. It is to bind with the internal reinforcing bars 510 of the foundation, and in this state, the final foundation concrete 500 may be poured to complete the foundation.

10 illustrates various embodiments of the shear stiffener 130 of the present invention in particular.

That is, the shear reinforcing material can be seen that the hook-type (reinforcement) shear connecting member 130, rather than the rectangular ring-shaped closed reinforcement according to Figure 6 can be used,

It can be seen that the c-shaped (reinforced or shaped steel) shear connector 130 may be used,

It can be seen that the bolt-shaped stud type shear connector 130 can be used,

It can be seen that triangular and v (v) shear connectors 130 may be used.

That is, the shear connector of the present invention can be seen that the same function and action may have a variety of shapes or forms, each of which may be determined in consideration of the size of the working load.

Claims

In the high-strength hollow pile (P.H. pile) by pretension comprising a hollow concrete pile portion formed with an internal reinforcement material including a steel bar and a spiral reinforcing bar,

Shear connector comprising a reinforcing bar installed to extend from the hollow concrete pile portion to the hollow portion (S) of the P. H pile; And

And a hollow concrete part formed by filling a hollow part concrete in the hollow part S of the P. H. pile so that the exposed shear connector is embedded and synthesized.
According to claim 1, wherein the shear connector is to be formed only to a certain depth from the top to the bottom of the PI seed pile, the predetermined depth is generated by a horizontal load such as an earthquake load acting on the PI seed pile installed in the ground Synthetic PI seed pile that is formed within at least 3 ~ 7M from the ground surface according to the strength of the load.
According to claim 2, The shear connector is any one of reinforcing bars, section steel or studs are arranged to surround the internal reinforcement in the transverse direction so that a plurality of spaced apart along the internal reinforcing material pile.
According to claim 1 or claim 2, wherein the reinforcement of the reinforcement including the reinforcing bar in the up and down direction in the hollow concrete portion is further installed in advance, the upper end of the bending reinforcement to the outside from the upper surface of the P. H. pile Synthetic PI seed piles that protrude.
In the method of manufacturing high strength hollow pile (P.H. pile) by pretension comprising a hollow concrete pile portion having an internal reinforcing material including a steel bar and a spiral reinforcing bar,

Placing the mold for the P. H. pi pile,

On the inner side of the mold, a shear connector including an inner reinforcement including a steel rod and a spiral reinforcement and a transverse reinforcement installed to extend and be exposed from the hollow concrete pile portion to the hollow portion S of the PI pile is disposed. and,

After the hollow concrete is put into the mold, the hollow mold which is injected by centrifugal force by rotating the mold can be formed with a predetermined thickness d from the inner surface of the mold, but the shear connector is hollow ( S) and the internal reinforcing material is embedded to be embedded, and the hollow concrete pile is formed while the hollow concrete is hardened,

Synthetic P. C pile manufacturing method comprising the step of demolding the mold.
The method of claim 5, wherein the shear connector is arranged to wrap the inner reinforcement in the transverse direction as a closed reinforcing bar is arranged so that a plurality of spaced apart along the inner reinforcement, formed only to a certain depth from the top to the bottom of the PI pile Manufacturing method of synthetic PI seed pile.
The method of claim 6, wherein before the hollow concrete input, the flexural reinforcement including the reinforcing bar in the up and down direction is further installed in the hollow portion (S) in advance, the upper end of the bending reinforcement is the top of the finished PI seed pile A method of manufacturing a synthetic PA seed pile, wherein a bending reinforcement member is disposed to protrude upward from the surface, and hollow concrete is inserted to allow the bending reinforcement member to be embedded.
In the high-strength hollow pile (P. H. pile) by the pretension including a hollow concrete pile portion formed with an internal reinforcing material including a steel bar and a spiral reinforcing bar, the hollow portion (S) of the P. H. pile from the inside of the hollow concrete pile Shear connector comprising a transverse rebar installed to extend to expose; And installed to the inside of the hollow portion in a vertical direction, the upper end of the bending reinforcement is installed so as to protrude outward from the upper surface of the PI seed pile;

Filling the hollow portion concrete in the entire hollow portion (S) of the PI seed pile so that the exposed shear connector and the flexural reinforcement is embedded to form a synthetic concrete including the hollow concrete portion of the synthetic PI seed pile Seed pile construction method.
9. The method of claim 8, wherein the upper end of the bending reinforcement member is bound to the internal reinforcing bars of the foundation to be used as a head reinforcement of the PI pile.
10. The method of claim 8 or 9, wherein the synthetic P. H. pile is installed to be inserted into the ground after connecting the simple P. H. pile having a hollow portion (S) to the bottom.