KR100742540B1 - Head cover of concrete pile for using footing foundation structure - Google Patents

Abstract

A head cover of a concrete pile for a foundation structure is provided to be inserted to the appointed depth even if sludge is adhered to the inner circumferential surface of a concrete pile driven in the ground and to promote the structural safety of a foundation structure. The head cover of a concrete pile for a foundation structure(200) contains a lower plate(110) inserted to the inside of a concrete pile(1) to place insert filler(C) in an appointed section of a pile(1), an upper cover(120) put on the top of the pile to prevent flexural deformation of reinforcing bars and to support reinforcing bars against the pile strongly, many reinforcing bars(130) fixed to the lower plate and the upper cover strongly, and an insertion guide unit(140) guiding the lower plate to be inserted to the inside of the pile to the wanted depth via sludge(S) adhered to the inner circumferential surface of the pile.

Description

HEAD COVER OF CONCRETE PILE FOR USING FOOTING FOUNDATION STRUCTURE}

1 is a perspective view of a head cover for a concrete pile according to the prior art.

Figure 2 is a longitudinal sectional view showing the installation state of the head cover for concrete piles according to the prior art.

Figure 3 is a longitudinal sectional view showing the installation state of the head cover by the sludge fixed to the inner circumferential surface of the concrete pile according to the prior art.

Figure 4 is a perspective view of the head cover of concrete piles for expansion foundations according to the present invention.

Figure 5 is a front view of the head cover of the concrete pile for the expanded foundation structure according to the present invention.

Figure 6 is another exemplary view of the upper cover applied to the head cover of the concrete pile for expansion foundation according to the present invention.

Figures 7a and 7b is a perspective view and a front view showing another illustration of the insertion guide portion applied to the head cover of the concrete pile for the expanded foundation according to the present invention, respectively.

8 is an installation state of the head cover of the concrete piles for expansion foundation according to the present invention.

<Description of Signs for Main Parts of Drawings>

1: concrete pile, 100: head cover

110: lower plate, 120: upper cover

130: rebar, 140: insertion guide

The present invention relates to a head cover of a concrete pile that is embedded in the ground during the construction of civil engineering and building structures, and more specifically, to expand the head cover into the design depth even if the sludge is fixed to the inner peripheral surface of the concrete pile The head cover of the concrete pile for the foundation structure.

In general, when the ground is soft when constructing bridges and buildings, ground compaction is performed to increase the strength of the ground.

These ground compactors usually include designation (rubble designation, sand designation, long headstone designation) and pile designation (wood pile designation, ready-made concrete designation, concrete pile, forced pile, etc.) and deep foundation designation (well-well foundation design, diving foundation designation). Etc.).

Conventional foundation piles are divided into the construction method, the site concrete pile construction method to excavate the ground and then solidify by placing concrete therein, and the type-type construction method to force the ready-made concrete pile into the ground, and the spiral groove on the pile outer surface. Rotation penetration method that forms and connects with the rotary indenter to rotate the pile is used.

Since the present invention in the conventional foundation pile construction for concrete piles will be described below only for concrete piles.

In the conventional foundation pile construction, the head cover is put on the head of the pile in a state in which the head (exposed part of the ground) of the concrete pile that is unevenly embedded at the time of driving the concrete pile is cut to a uniform dimension, thereby covering the concrete pile. Protect tofu

As a head cover for a concrete pile which has been widely used in the prior art, the applicant disclosed in Korean Patent Application Publication No. 10-2004-0051056 (published date; June 18, 2004), which the applicant has applied for a patent on December 11, 2002. It is.

As shown in FIG. 1 and FIG. 2, the head cover 10 for the concrete pile disclosed in Korean Patent Laid-Open Publication No. 10-2004-0051056 discloses a tip portion of the concrete pile 1 to a rock layer (or gravel layer). After being driven in contact, the upper part exposed on the ground is finished at the circumference to be joined to surround the upper circumferential surface of the concrete pile 1 cut using a grinder (or a pile cutting machine or a conventional method) at a constant height. A circular cap 11 having a portion 11a and having a central hole 11b having a substantially same size as the hole 1a formed in the concrete pile 1 at the central portion thereof, and a central hole 11b formed in the cap 11. Welding in parallel with a plurality of first steel wires 12 fixed to the inner circumferential surface of the bottom surface at a predetermined distance with respect to the upper surface 11c of the circular cap 11 at a lower end of the first steel wire 12. Along the longitudinal direction of the concrete pile (1) A circular metal plate 13 inserted into the hole 1a formed in the hem, and a plurality of agglomerated seconds in which the lower part is fixed by welding so as to extend upwardly perpendicularly to the center of the circular metal plate 13 to increase the seismic force; The steel wire 14 is comprised.

The circular metal plate 13 of the head cover 10 inserted into the hole 1a formed at the center along the longitudinal direction of the concrete pile 1 is used to fix the concrete pile 1 and the head cover 10. When pouring concrete into the hole (1a) of 1) acts as a blocking plate so that the concrete does not flow down to the lower part of the concrete pile (1) by easily pouring the concrete can save the concrete, also circular metal plate (13) Since the solidified by the concrete in the hole (11b) with the lower portion of the first steel wire 12 welded to the head cover 10 can be firmly fixed to the concrete pile (1).

The first and second steel wires 12 and 14 are formed with a spiral groove formed on the outer circumferential surface of the first and second steel wires 12 and 14, and a steel wire having a high tensile force may be used, but steel bars may be used. The first steel wires 12 may be fastened with a band reinforcing bar 15 at regular intervals up and down.

As shown in Figure 3, the concrete pile 1 is sludge (S) is fixed to the inner peripheral surface naturally during the manufacturing process, the inner peripheral surface is not flat. Therefore, when the head cover 10 is inserted into the concrete pile 1, the metal plate 13 is caught by the sludge S, and thus there is a problem that the metal plate 13 may not be inserted to the set position L. Specifically, the depth of the concrete filling material varies depending on the insertion position of the metal plate 13. Therefore, when the head cover 10 is installed, the insertion position of the metal plate 13 is set in advance through structural calculation. In other words, if the metal plate 13 is not inserted to the desired depth, the binding force between the concrete and the pile is dropped, so that the expansion base structure cannot be stably supported.

Therefore, when the sludge S is present on the inner circumferential surface of the concrete pile 1, the sludge S may be removed from the inner circumferential surface of the concrete pile 1, but this requires a separate work, and also the hole of the concrete pile 1 The work is also inconvenient because the size is narrow to work.

In addition, the upright state should be maintained when the first steel wire 12 is viewed from the front, but only the configuration (grooves, etc.) for fixing the first steel wire 12 is shown on the metal plate 13 and the cap 11, respectively. There is also a problem that the rebar does not stand up and tilt because it does not display the configuration corresponding to each other.

The present invention is to solve the above-described problems, when the head cover is inserted into the concrete pile embedded in the ground of the lower base structure, the sludge is fixed to the inner circumference of the concrete pile, even if protruding from the inner circumference of the concrete pile head cover to the desired depth It is an object of the present invention to provide a head cover of concrete piles for expansion foundations that can be inserted.

Another object of the present invention is to be able to easily erect reinforcing bars.

In addition, another object of the present invention is to increase the binding between the concrete pile embedded in the ground and the expanded foundation structure and to stabilize the structure of the expanded foundation structure.

Head cover of the concrete pile for expansion foundation structure according to the present invention for achieving the above object, the lower plate is inserted into the interior of the concrete pile, the upper cover seated on the upper surface of the concrete pile, the lower end is fixed to the lower plate A plurality of reinforcing bars extending in a fixed state to the upper cover, characterized in that it comprises an insertion guide formed in the periphery of the lower plate to guide the sludge protruding to the inner peripheral surface of the concrete pile.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in Figures 4 and 5, the head cover 100 of the concrete pile for expansion foundation according to the present invention, the interior of the concrete pile 1 (hereinafter abbreviated as 'pile') (shown in Figure 8) Inserted into the lower plate 110 to support the filling material (C) to be placed only in a certain section inside the pile (1), the upper cover 120 that is seated on the upper surface of the pile (1), the lower portion of the lower plate 110 Sludge S fixed on the inner circumferential surface of the pile 1 when the plurality of reinforcing bars 130 and the lower plate 110 are inserted into the pile 1 and fixed in the middle of the upper cover 120. It is configured to include an insertion guide 140 for guiding the lower plate 110 is inserted into the desired depth through the).

The lower plate 110 is made of steel, synthetic resin, and the like, and is made of a flat plate, and the filling material C is not poured to the bottom of the pile 1 without the pile 1 and the expansion base structure 200. It is to be poured only to the depth for binding, and also supports the reinforcement 130. The lower plate 110 has an outer diameter such that the filling material C does not leak to the lower portion through the lower plate 110.

The upper cover 120 is to prevent the bending deformation of the reinforcing bar 130 and to ensure that the reinforcing bar 130 is firmly supported on the pile (1), the material (steel), synthetic resin, etc. 6 may be in the form of a flat plate or, as shown in FIG. 6, the skirt 121 is formed to extend downward, and is seated on the top surface of the pile 1 regardless of its shape.

Rebar insertion grooves 111 and 122 are formed in the lower plate 110 and the upper cover 120 so that the reinforcing bars 130 are firmly coupled to the lower plate 110 and the upper cover 120. That is, the middle of the reinforcement reinforcement 130 is inserted into the reinforcement insertion groove 122 of the upper cover 120 and the lower end is welded in the state inserted into the reinforcement insertion groove 111 of the lower plate 110. At this time, the reinforcing bar 130 is inserted into each of the reinforcing bar insertion grooves (111, 122) can increase the mutual binding force, but when the reinforcing bar 130 is inserted into the reinforcing bar insertion grooves that do not correspond to each other, it is not upright and twisted In order to prevent this, the circumferential portion of the lower plate 110, the positioning unit 112 for indicating the position of the reinforcing rod groove 111 of the lower plate 110 corresponding to the reinforcing rod groove 122 of the upper cover 120 Is formed. The positioning unit 112 may have a protrusion shape or a groove shape on the outer circumference of the lower plate 110.

The reinforcing bar 130 is arranged in the form of a circle, for example, six, eight, etc., and serves as a medium for binding the enlarged foundation structure 200 and the pile (1).

Insertion guide 140, when the lower plate 110 is inserted into the pile 1, the sludge (S) is fixed to the inner peripheral surface of the pile (1) even if the lower plate 110 is protruded more than the inner peripheral surface of the pile (1) smoothly While passing through the sludge (S) can be inserted to a desired depth while performing the function to prevent the filling material (C) from leaking to the bottom of the lower plate 110, specific embodiments will be described below.

<Example 1>

As shown in FIG. 4, the insertion guide 140 according to the first embodiment is an arc-shaped plate and is bent to be inclined with respect to the lower plate 110. At this time, the lower plate 110 maintains a circular shape when viewed in plan view, including the insertion guide 140. The insertion guide part 140 is connected to the lower plate 110 so as to be foldable (bent) around the lower plate 110, and the other part is cut and bent through the connecting portion 141 to vary the angle. Insertion guide 140 may be formed in the entire area around the periphery of the lower plate 110, but due to the manufacturing characteristics of the pile 110, the sludge (S) is not generated entirely on the inner circumferential surface of the pile 1, so the lower plate It is preferably formed in a portion of the inner circumferential surface of (110).

In addition, only one insertion guide 140 may be formed on the lower plate 110, a plurality may be formed continuously, and a plurality of insertion guides 140 may be formed at predetermined intervals along the circumferential direction.

<Example 2>

As shown in Figure 7a and 7b, the insertion guide 140 according to the second embodiment is an arc-shaped plate-like hinge 142 is coupled to the lower plate (110).

The insertion guide 140 rotates with respect to the lower plate 110 through the hinge 142 to vary the angle so that the lower plate 110 can pass through the sludge S fixed to the inner circumferential surface of the pile. Of course, the insertion guide 140 is configured such that the free end is flipped upward while maintaining the same height as the lower plate 110. Also, although not shown in the drawing, the free end of the insertion guide 140 is always in its original state. It may be further provided with an elastic member to maintain.

On the other hand, the head reinforcement method by the head cover of the concrete pile for expansion foundation according to the present invention because the reinforcing bars 130 to resist the bending moment applied to the pile (1) according to the specification of the reinforcing bars 130 There is a big difference.

In order to more effectively distribute the stress generated in the pile 1, the reinforcing bar 130 is installed to be inclined at 60 ~ 80 ° with respect to the lower plate (110).

In addition, the interval H between the lower plate 110 and the upper cover 120 is 35 ~ 45cm.

The angle of this rebar, the spacing between the bottom plate and the top cover, is not simply numerical limitation but is demonstrated by the following experimental data.

The construction method of the head cover of the concrete pile for the expanded foundation structure according to the present invention configured as described above is as follows.

(S10) pile construction. The pile 1 is driven in the ground through a drive or auger. At this time, the upper portion of the pile 1 to protrude from the ground.

(S20) pile tofu clearance. If a plurality of piles (1) is put in the ground, the height of the pile (1) protruding from the ground is not constant, so the cutting head is cut and arranged using the cutting equipment.

(S30) Head cover attached. When the head of the pile 1 is arranged through the above process, the head cover 100 according to the present invention is mounted on the head of the pile 1, and the mounting method thereof is as follows.

Align the lower plate 110 with the hollow part inside the pile 1 and push it downward. At this time, as shown in Figure 5, a portion of the inner circumferential surface of the pile (1) may be fixed to protrude more than the inner circumferential surface of the pile (1) naturally generated sludge (S) in the manufacture of the pile (1), the pile (1) ) If the sludge (S) is present on the inner circumferential surface and the insertion guide 140 to match the sludge (S) and then push the lower plate 110 downward.

When the lower plate 110 is lowered in the pile 1 and the insertion guide 140 contacts the sludge S, the sludge S protrudes more than the inner circumferential surface of the pile 1 so that the insertion guide 140 is connected. It is passed through while being 141 (or rotate through the hinge 142 when the insertion guide 140 is coupled to the hinge 142). That is, even if sludge S is present on the inner circumferential surface of the pile 1, the lower plate 110 may be inserted into the pile 1 without interference from the sludge S.

When the lower plate 110 is inserted to the designed depth, the upper cover 120 is naturally seated on the upper surface of the pile (1).

(S40) Expansion of foundation foundation. When the concrete is poured for construction of the expanded foundation structure 200 on the ground, the filling material (C) is filled in the pile 1 through the upper cover 120. Here, since the interior of the pile 1 is a space below the lower plate 110 by the lower plate 110, the filling material (C) is filled only up to the lower plate (110).

As described above, according to the head cover of the concrete pile for expansion foundation according to the present invention, even when the sludge naturally occurs in the inner surface of the concrete pile during the manufacture of the concrete pile insertion guide without performing the operation to remove the sludge Since the lower plate can be inserted to a desired depth, it can sufficiently serve as a medium for structural reinforcement between the concrete pile and the expanded foundation structure, and consequently, can increase the structural rigidity of the expanded foundation structure.

In addition, the reliability of the product can be improved by maximizing the structural rigidity of the expanded base structure through the structural improvement of the lower plate, the upper cover and the reinforcing bar.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (5)

delete A lower plate inserted into the hollow pile embedded in the ground to expose the upper portion; An upper cover spaced apart from the lower plate at a predetermined height and seated on an upper surface of the pile; In the head cover of the concrete pile for expanded foundation structure comprising a plurality of reinforcing bars extending in a lower end is fixed to the lower plate and the middle is fixed to the upper cover, It is formed to be foldable at the periphery of the lower plate to pass the sludge fixed to the inner peripheral surface of the pile guides the lower plate to be inserted into the pile to the desired depth, and the concrete placed on the pile to the bottom of the lower plate One or more insertion guides to prevent leakage; The insertion guide, the head cover of the concrete pile for expansion foundations, characterized in that the incision is bent to be inclined at a predetermined angle to the circumference of the lower plate. The head cover of the concrete pile for the expanded foundation structure, characterized in that the insertion guide is connected to the lower plate by a hinge to adjust the angle. The method of claim 2 or 3, The circumferential portion of the lower plate is a head cover of the concrete pile for expansion foundation structure, characterized in that the positioning portion is formed so that the reinforcement is maintained at the same interval along the circumferential direction. The method of claim 4, wherein The gap between the lower plate and the upper cover is 35 ~ 45cm, the reinforcement reinforcement is a head cover of the concrete pile for expansion foundations, characterized in that inclined at 60 ~ 80 ° with respect to the lower plate.

Images