KR20150081005A - Pile cap assembly for load distribution and method for constructing foundation using the same - Google Patents

Abstract

The purpose of the present invention is to solve a problem that support force of a foundation concrete as the foundation concrete and a post are strongly combined with each other. To solve the problem, a pile cap assembly, installed on a post for foundation construction, includes an upper cap covering the top of the post while being away from the top of the post in a predetermined distance; a lower cap inserted into an inner hole of a foundation pile to cover the inner hole; a reinforcing bar having a side combined with the lower cap, connected to the upper cap, and having an upper part combined with the foundation concrete by being exposed above the upper cap; an injection pipe connected to the upper cap to inject a filler into a gap between the upper and lower caps; a discharge pipe discharging the rest of the filter injected into the gap; and a support member making the upper cap get away from the top of the post in a predetermined distance until a predetermined load is applied to the upper cap. The foundation concrete and the post are integrated with each other by injecting the filler into the gap after ground subsidence by the weight of a structure, and therefore, the load distribution type pile cap assembly is capable of distributing a load to the ground and the post.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a load-carrying type file cap assembly,

The present invention relates to a load-carrying type file cap assembly and a foundation construction method using the same. More particularly, the present invention relates to a load-carrying type file cap assembly and a foundation construction method using the same, The present invention relates to a pile cap assembly and a foundation construction method using the same, which can solve the problem and can be installed between a pile and a foundation concrete to control relative displacement.

Large-scale structure The structure supporting the load of the structure is also changed to support a large load in accordance with the high-rise structure. Among them, a method of supporting a load by using a pile is widely used. FIG. 1 schematically shows a supporting system using such a pile. The load of the structure 3 is supported by the foundation concrete 2 and the pile 1. As shown in FIG. The tip of the pile 1 is supported by a relatively solid ground or rock layer 5 and the foundation concrete 2 is supported by a relatively soft ground layer 4. [

In this case, the foundation concrete 2 and the pile 1 are divided by the load of the structure 3. Since the load is transmitted to the pile 1 through the foundation concrete 2, do.

As a technology for a solid connection between concrete piles and foundation concrete, 'Cap assembly for basic use file (No. 10-0583879)' and 'Reinforcement cap assembly for reinforcing concrete file (No. 10-0866419)' are representative, These techniques are structurally rigidly connected to the pile and foundation concrete, allowing them to move together and transmit loads.

However, in the conventional techniques, since the pile and the foundation concrete are solidly integrated immediately after the placement of the foundation concrete, the pile 1 supported by the rock layer 5, which is relatively deformed, and the ground layer 4, There is a problem in that the base concrete 2 acting as an integral part can not sufficiently utilize the supporting force of the ground layer 4. That is, the ground layer exerts a larger supporting force after a certain degree of deformation, but the deformation is limited so that a sufficient supporting force can not be exerted.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems and to provide an efficient foundation system by sufficiently utilizing the supporting force of the ground layer. It allows relative displacement between the pile and the foundation concrete to a level at which the ground layer can exhibit sufficient supporting force And it is an object of the present invention to provide a load-carrying distributed type file cap assembly capable of firmly coupling a foundation concrete and a pile after a certain displacement occurs.

In order to accomplish the above object, according to the present invention, a load-carrying capacity type cap cap assembly comprises: an upper cap covering an upper end of a pile at a predetermined distance from an upper end of a pile; A lower cap inserted into the hollow of the pile to close the hollow; A reinforcing bar coupled to one side of the lower cap and connected to the upper cap and having an upper portion exposed above the upper cap to be coupled to the base concrete; An injection pipe connected to the upper cap for injecting a filler into a space between the upper cap and the lower cap; A discharge pipe through which a surplus filler filled in the space is discharged; And a strut member spaced apart from the upper end of the pile by a predetermined distance until a load equal to or greater than a predetermined level is applied to the upper cap. So as to integrate the foundation concrete and the pile, thereby dispersing the bearing load on the pile and the ground.

In this case, in order to reduce the amount of filler injected, a concrete injection port is formed at the center of the upper cap, and a lower end is coupled with the lower cap and an upper end is coupled with the upper cap between the upper cap and the lower cap, And a partition wall for forming a space through which the filler material is injected.

And an annular gasket coupled to the periphery of the lower cap so as to be able to adapt to the error of the inner diameter of the pile by integrally forming blade pieces that can be bent upwards around the lower cap, Adaptation can be made.

Wherein the upper cap is composed of an upper plate portion located on the upper portion of the pile and a side portion surrounding the exposed outer side of the pile, and a lower end portion of the side portion is installed so as to be embedded below the ground surface or foundation concrete pouring surface, Can be prevented.

Also, the strut member may be formed of at least one pipe member disposed between the upper cap and the upper end of the pile, so that the compression amount and the magnitude of the support force can be easily adjusted by controlling the diameter and length of the pipe.

The separation barrier may be selected from a corrugated pipe, a wire mesh, a metal lath, and a perforated network to increase the friction between the concrete and the filler.

The foundation construction method according to the present invention using the above-described load-carrying capacity type cap cap assembly includes a first step of installing a plurality of piles at a predetermined interval on the ground; A second step of cutting the upper end of the pile projecting from the ground with leaving a certain length; A method for manufacturing a load-carrying type pile cap assembly according to any one of claims 1 to 7, A fourth step of casting the foundation concrete; A fifth step of constructing a part of the structure on the foundation concrete and waiting until the ground subsides to a certain extent; And a sixth step of integrating the pile, the pile cap assembly, and the foundation concrete by injecting filler into the space through the injection pipe.

In particular, in the sixth step, the filling pipe is connected to the injection pipe of at least one or more pile cap assemblies adjacent to the discharge pipe of any one of the pile cap assemblies, It is possible to inject the filler into the cavity.

Since the above-described load-carrying-type file cap assembly and the foundation construction method using the same, the relative displacement between the foundation concrete and the pile is allowed to some extent and then the filling material is filled and joined. So that the supporting force of the entire basic system can be improved.

Figure 1: Pile-Foundation Concrete-Structure Conceptual Diagram
2 is a perspective view of a load-carrying distributed file cap assembly of the present invention;
Fig. 3: Cross-sectional view of a load-carrying distributed file cap assembly installed on a pile
Figure 4: Installation workflow diagram
5: sectional view of a pile cap assembly with a separating bulkhead
6 shows a bottom cap embodiment with a wing-piece.
7 shows a bottom cap embodiment with a gasket.
8 is a view showing an embodiment of the upper cap;
9 is a view showing another embodiment of the upper cap;
10 is a view for explaining an embodiment of connecting a plurality of file cap assemblies;
11 is a view showing an embodiment in which an injection tube and a discharge tube are in contact with each other;
12 is a view showing one embodiment of a strut member connected to a rebar;
Figure 13 is a view of an embodiment of a strut member connected to a lower cap.
14 shows a spiral spring type strut member embodiment.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The pile 10 in the present invention means a pile of hollow concrete, and the base concrete 20 means the base of reinforcing steel-concrete material and is also referred to as a mat foundation. A basic system composed of such a pile 10 and a foundation concrete 20 is generally referred to as a piled raft foundation.

FIG. 2 is a perspective view showing a preferred embodiment of the load-carrying capacity type file cap assembly of the present invention, and FIG. 3 is a sectional view of the pile 10. FIG.

An upper cap 30 covering the upper end of the pile at a predetermined distance from the upper end of the pile 10 and a lower cap 40 inserted into the inner cavity of the pile 10 to close the pile 10, And a reinforcing bar (60) to which one end is coupled and which is connected to the upper cap (30) and the upper end is exposed above the upper cap to be coupled to the foundation concrete, (31) for injecting the filler (70) into the space (34) between the upper cap (40) and a discharge pipe (32) through which the excess filler material remaining in the space is discharged, The upper cap is spaced apart from the upper end of the pile by a predetermined distance until a load equal to or greater than a predetermined load is applied to the pile, and a filler is injected into the space after the ground subsidence occurs to some extent by the load of the structure The foundation concrete and the pile The present invention proposes a load-carrying distributed file cap assembly for dispersing the load bearing capacity on the pile and the ground by embedding the load-bearing capacity.

4A and 4B show a process of using the load-carrying capacity type cap cap assembly of the present invention in order. FIG. 4A is a cross-sectional view of the pile 10, , And (B) is a state in which the foundation concrete (20) is constructed in the state (A). The foundation concrete 20 does not normally represent reinforced concrete (RC) structures including reinforcing bars or reinforcing bars for convenience. (C) shows a state in which a structure is partially installed on the foundation concrete (20) in the state of (B), and the foundation concrete (20) receiving the load of the structure sinks downward, And the relative displacement between the pile (10) and the foundation concrete (20) is gathered. At this time, the ground 80 is also consolidated and the bearing capacity is increased. 4 (D) shows a state in which the filling material 70 is injected from the outside through the injection pipe 31 in a state where a constant relative displacement occurs between the pile 10 and the foundation concrete 20, It shows the filled state. The filling material can be made of various materials such as mortar, synthetic resin, etc. The space portion 34 is filled and the pile 10 and the base concrete 20 are structurally solidly integrated.

5 is a cross-sectional view of another embodiment of the present invention. In order to reduce the amount of filler injected, a concrete injection port 39 is formed at the center of the upper cap 30, The upper end of the partition wall 42 is coupled with the lower cap and the upper end is coupled with the upper cap to form a space for filling the filler material with the inner wall of the pile 10. [ The partition wall 42 separates the inside and the outside of the partition wall. The space between the inside walls of the pile 10 from the outside of the partition wall 42 corresponds to the space 34 to be filled with the filler. The inner space of the separating partition wall 42 is filled with the concrete before the foundation concrete 20 is poured or simultaneously with the foundation concrete pouring. The file cap assembly of this embodiment has the advantage of reducing the amount of filler material and shortening the working time.

In FIG. 5, the partition wall 42 may be selected from a corrugated pipe, a wire mesh, a metal lath, and a perforated network to increase the friction between the concrete and the filler.

Since the concrete pile 10 is manufactured by a centrifugal method, the outer diameter is accurate, but the inner diameter is slightly misaligned. 6 shows an embodiment in which blade pieces 45 are integrally formed around the lower cap so as to be bent in the direction of the upper cap to facilitate adaptation to the error of the inner diameter of the pile 10, 7 shows an embodiment that includes an annular gasket 46 coupled to the periphery of the lower cap to accommodate the inner diameter error. The cross-sectional shape of such a gasket can be variously applied, and since the filler material 70 such as mortar, synthetic resin, etc. is generally viscous, there is no difficulty in filling the filler material even if there is a slight gap.

8 and 9, the upper cap 30 is composed of an upper plate 36 positioned on the upper portion of the pile and a side portion 37 surrounding the exposed outer side of the pile, Or the bottom surface of the foundation concrete 20 so that the foundation concrete can be prevented from entering the inside of the upper cap.

4, the strut member 50 is formed of at least one pipe-shaped strut member disposed between the upper cap and the upper end of the pile to adjust the diameter and the length of the pipe, And the magnitude of the supporting force can be simply controlled.

A first step of installing a plurality of piles at a predetermined interval on the ground using the load carrying capacity type cap assembly of the present invention; A second step of cutting the upper end of the pile 10 projecting from the ground, leaving a certain length; A method for manufacturing a load-carrying type pile cap assembly according to any one of claims 1 to 7, A fourth step of casting the foundation concrete 20; A fifth step of waiting until the ground 80 is settled to a certain degree while constructing a part of the structure on the foundation concrete 20; And a sixth step of integrating the pile, the pile cap assembly and the foundation concrete by injecting the filler material (70) into the space part (34) through the injection pipe (31) It is possible to do foundation work using the assembly.

In the fourth step, when the foundation concrete 20 is laid, the supporting member 50 should be able to support the weight of the foundation concrete. In the fifth step, when the load of the structure is applied, The member 50 is deformed to cause relative displacement between the foundation concrete 20 and the pile 10. [ The ground 80 can sink to some extent and the supporting force can be increased. When the supporting force of the ground is over a certain level, the filling material 70 is injected as in the sixth step to fill the space portion 34, The file cap assembly and the foundation concrete 20 are integrated. After the sixth integrated step, the pile 10 and the foundation concrete 20 are integrally moved and support the load of the structure.

In particular, in the sixth step, a discharge pipe of one of the pile cap assemblies is connected to an injection pipe of at least one pile cap assembly adjacent to the pile cap, It is possible to inject the filler into the cavity. As in the embodiment of FIG. 10, it is possible to connect the discharge pipe 32a of one pile cap assembly and the injection pipe 31b of another pile cap assembly adjacent to each other through the connecting hose 33ab, So that it is easy to work and the number of the end portions of the connection hose 33 exposed to the outside for the injection of the filling material can be reduced.

In the present invention, at least one injection pipe 31 and at least one discharge pipe 32 are required in the upper cap 30 for injecting the filler material. The injection pipe 31 and the discharge pipe 32 The filler material is heavier than the air and falls downward, so that the space portion is filled and then discharged through the discharge pipe.

The supporting member 50 of the present invention supports the load of the foundation concrete when the foundation concrete 20 is poured and is deformed at the stage where the load of the foundation is applied to the foundation concrete 20, .

Such strut members can be implemented in various forms. 4 and 5, it is supported by the upper end of the pile 10 and supports the inner side surface of the upper cap 30. As shown in FIG. It is preferable that the strut member 52 connected to the reinforcing bar 60 as shown in FIG. 12 is fixed to the reinforcing bar, and one side thereof is supported by the upper end of the pile 10. FIG. Also, as shown in FIG. 13, a strut member 53 connected to the lower cap is also possible, which is fixed to the lower cap 40 and supported by the upper end of the pile 10. 14, a spiral spring-type stiffening member 54 is also supported, which is supported at the upper end of the pile 10 and supports the inner surface of the upper cap 30. Here, the upper end of the pile 10, on which various supporting members are supported or fixed, means an upper portion of the pile, not a specific point, and an area capable of properly supporting or fixing the vicinity of the pile.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

1: pile 2: foundation concrete 3: structure 4: ground layer 5: rock layer
10: pile 20: foundation concrete
30: upper cap 31: injection tube 32: discharge tube 33: connection hose
34: space part 36: upper plate part 37: side part 39: concrete injection hole
40: Lower cap 42: Separation barrier 45: Blade 46: Gasket
50: strut member 52: strut member connected to the rebar
53: strut member connected to the lower cap 54: spiral spring type strut member
60: Rebar
70: Filler
80: Ground

Claims (9)

Claims [1] A pile cap assembly for use in a foundation pile, which is connected to foundation concrete,
An upper cap covering the upper end of the pile at a predetermined distance from the upper end of the pile;
A lower cap inserted into the hollow of the pile to close the hollow;
A reinforcing bar coupled to one side of the lower cap and connected to the upper cap and having an upper portion exposed above the upper cap to be coupled to the base concrete;
An injection pipe connected to the upper cap for injecting a filler into a space between the upper cap and the lower cap;
A discharge pipe through which a surplus filler filled in the space is discharged; And
And a strut member spaced from the upper end of the pile by a predetermined distance until a load greater than a predetermined level is applied to the upper cap,
A load carrying capacity type pile cap assembly for injecting a filler into a space portion after a certain amount of ground settlement due to a load of a structure and integrating the pile with the foundation concrete to thereby distribute the load bearing capacity to the pile and the ground.

The method according to claim 1,
The upper cap has a concrete injection port formed at a central portion thereof,
Further comprising a partition wall between the upper cap and the lower cap to define a space through which the filler is injected between the lower cap and the inner wall of the pile, Distributed file cap assembly.
The method according to claim 1,
And a blade piece that can be bent upwards is integrally formed around the lower cap.
The method according to claim 1,
Further comprising an annular gasket coupled to the periphery of the lower cap.
The method according to claim 1,
Wherein the upper cap comprises an upper plate portion located on the upper portion of the pile and a side portion surrounding the exposed outer side of the pile,
And a lower end portion of the side portion is installed so as to be embedded in the ground or below the foundation concrete pouring surface.
The method according to claim 1,
Wherein the strut member is at least one pipe member disposed between the upper cap and the upper end of the pile.
3. The method of claim 2,
Wherein the partition wall is any one selected from a corrugated pipe, a wire mesh, a metal lath, and a perforated network.
A first step of installing a plurality of piles at predetermined intervals on the ground;
A second step of cutting the upper end of the pile projecting from the ground with leaving a certain length;
A method for manufacturing a load-carrying type pile cap assembly according to any one of claims 1 to 7,
A fourth step of casting the foundation concrete;
A fifth step of constructing a part of the structure on the foundation concrete and waiting until the ground subsides to a certain extent; And
And a sixth step of integrating the pile, the pile cap assembly, and the foundation concrete by injecting a filler into the space through the injection pipe.
9. The method of claim 8,
In the sixth step,
The filler is injected into the spaces of the plurality of adjacent pile cap assemblies by connecting the discharge pipe of one of the pile cap assemblies to the pile of the at least one pile cap assembly adjacent thereto and injecting the filler into one pile Wherein the first and second fingers are connected to the first and second fingers.

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