WO2011159115A2 - Complex pile, and method for fabricating the complex pile - Google Patents

Abstract

The present invention relates to a complex pile for a foundation construction. The complex pile comprises: a concrete column having two ends and a side surface; a tension member, both ends of which are fixed at either end of the concrete column, respectively, and which applies compression force to the concrete column; and a steel pipe which is arranged so as to cover a portion of the side surface of the concrete column, and which has a plurality of holes for placing concrete. The complex pile of the present invention is configured such that a portion of a concrete pile is combined with a steel pile into an integrated form, to thereby significantly reduce costs for bonding the concrete pile and the steel pile during construction.

Description

Compound file and manufacturing method

The present invention relates to a composite pile and a method for manufacturing the same, and more particularly to a composite pile formed of a concrete pile, a part of a steel pipe pile and a method for manufacturing the same.

The pile foundation is one of the basic types used when the depth of the support layer is deep, and by constructing an upper structure on the pile embedded into the support layer, it is possible to stably support the weight of the structure in the support layer.

Concrete piles, steel pipe piles, and composite piles are used for piles. Concrete pile refers to RC pile, PHC pile, PC pile, etc., and the tip of the pile itself is closed, which has the advantage of high tip bearing capacity, and the material cost is 2 ~ 3 times cheaper than steel pipe pile, which can reduce the construction cost. have.

However, when the upper load is applied to the foundation, the largest shear force, bending moment, and axial force are applied to the upper part of the pile. The concrete pile has a small shear force and resistance to moment, and thus requires a large number of piles.

On the other hand, the steel pipe pile is uniform pile material, the resistance to load over the entire length of the pile is uniform, and particularly excellent in bending moment and shear force. Furthermore, after finishing the penetration into the ground, it is possible to minimize the material loss by cutting and reusing the excess of the pile projecting over the ground surface. However, steel pipe pile has the disadvantage that the material cost is two to three times more expensive than the general concrete pile.

In order to maximize the advantages of the concrete pile and steel pipe pile as described above is provided a composite pile coupled to the upper end of the concrete pile and welded to the steel pipe. In other words, composite piles have the advantage of reducing construction costs by using concrete piles with excellent tip support and low cost of materials, and connecting piles with steel pipe piles with high resistance to them. have.

However, it takes a lot of time and effort to weld the steel pipe pile on the construction site at the top of the concrete pile, causing cost increase. In addition, when driving the synthetic pile, there is a disadvantage that the impact that the hammer applied to the steel pipe pile is not completely transmitted to the concrete pile, the workability is poor. Therefore, the manufacturing cost is reduced, and there is an urgent need for a synthetic pile having good workability.

Embodiments of the present invention are to provide a synthetic pile with improved construction while reducing manufacturing costs.

According to an embodiment of the present invention, a concrete pillar composed of both end surfaces and side surfaces; A tension member having both ends fixed to both end surfaces of the concrete pillar and applying a compressive force to the concrete pillar; And a steel pipe pipe formed to surround a portion of the side of the concrete pillar and having a plurality of concrete pouring holes formed therein, wherein the concrete pillar has an area in which the steel pipe pipe is wrapped and the side of the concrete pillar is exposed. It provides a composite file characterized in that the region is formed divided over the entire length.

Here, the synthetic concave-convex for synthesis with the concrete pillar is formed on the inner peripheral surface of the steel pipe pipe.

On the other hand, as another category of the present invention, a method for producing a composite file is provided. The method of manufacturing a composite pile includes preparing a reinforcing bar assembly in which a plurality of tension members are disposed in a longitudinal direction; Fitting a cylindrical steel pipe pipe shorter than the entire length of the composite pile to one end of the reinforcing assembly so as to surround a portion in the longitudinal direction of the composite pile; Inserting the reinforcing bar assembly and the steel pipe into a lower formwork; Fixing one end of the reinforcing bar assembly to one end of the lower formwork and coupling the other end to the tensioning device; Injecting concrete into the lower formwork and fastening the upper formwork to the lower formwork; Driving the tension device to tension the tension member; Curing after centrifugal molding in the tensioned state of the tension member; And disengaging the tensioning device and removing the upper formwork and the lower formwork; Provided is a method for manufacturing a composite file comprising a.

Here, a concrete pour hole is formed on the surface of the steel pipe pipe so that concrete can be introduced into the steel pipe, and when concrete is injected into the lower formwork, it is preferable to add concrete into the steel pipe pipe through the concrete pour hole. .

Unevenness is formed on an inner circumferential surface of the steel pipe.

Steel pipe pipe is more effectively formed by wrapping the deck plate in a circular shape.

On the other hand, after pouring the concrete through the concrete pouring hole, before fastening the upper formwork to the lower formwork, the step of installing a blocking plate in the concrete pouring hole; preferably further comprises a.

Synthetic protrusions are formed on the surface of the blocking plate in contact with the concrete.

In addition, in the step of injecting concrete into the lower formwork, it may be implemented by inserting the concrete pipe for transport into the inner side of the steel pipe pipe and then press the concrete to the inside of the steel pipe pipe.

On the other hand, in another embodiment of the composite pile manufacturing method, preparing a reinforcing bar assembly is arranged a plurality of tension members in the longitudinal direction; Arranging a lower steel pipe pipe, which is cut in half at one lower end of the reinforcing bar assembly and shorter than a length of the composite pile; Disposing a lower formwork below the reinforcing bar assembly and the lower steel pipe pipe; Fixing one end of the reinforcing bar assembly to one end of the lower formwork and coupling the other end to the tensioning device; Injecting concrete into the lower formwork and the lower steel pipe pipe, placing an upper steel pipe pipe on the upper portion of the lower steel pipe pipe, and fastening the upper formwork to the lower formwork; Driving the tension device to tension the tension member; Curing after centrifugal molding in the tensioned state of the tension member; And releasing the coupling with the tensioning device, and removing the lower formwork and the upper formwork.

The inner circumferential surface of the lower steel pipe and the upper steel pipe pipe is formed to protrude concavities and convexities for concrete synthesis.

After positioning the upper steel pipe pipe on the upper portion of the lower steel pipe pipe, and before fastening the formwork to the lower formwork, it is effective to fix the lower steel pipe pipe and the upper steel pipe pipe by a fastening means.

The fastening means includes a fastening hole formed at a portion facing each other in the lower steel pipe and the upper steel pipe pipe, and a fastening bolt fastened to the fastening hole.

On the other hand, in another embodiment of the composite pile of the present invention, a concrete pillar consisting of both end surfaces and sides; A tension member having both ends fixed to both end surfaces of the concrete pillar and applying a compressive force to the concrete pillar; And a steel pipe pipe formed to cover a portion of the side of the concrete pillar, wherein the concrete pillar is divided into an area in which the steel pipe is wrapped and an area in which the side of the concrete pillar is exposed as it is over the entire length. Provided is a composite file characterized in that formed.

Synthetic irregularities for synthesizing with the concrete pillar are formed on the inner circumferential surface of the steel pipe pipe.

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

The composite pile is formed by integrally forming a portion of the concrete pile into a steel pipe pile, thereby significantly reducing the cost for joining the concrete pile and the steel pipe pile during the construction process.

In addition, since the concrete pile and the steel pipe pile are synthesized and molded, even if the thickness of the steel pipe pile is thin, sufficient load bearing capacity can be exhibited. As a result, material costs (since steel pipes are much higher than concrete) can be reduced.

In addition, since the concrete pile is integrally molded, the impact force transmitted from the hammer during construction is directly transmitted to the lower portion, and thus the workability is much better.

And, due to the concrete placing hole, it is possible to make the thickness of the concrete pile constant inside the steel pipe pile, and to facilitate the manufacture.

1 is a perspective view of a composite pile of a first embodiment of the present invention

2 is a cross-sectional view taken along the cutting line II-II of FIG.

3 is a cross-sectional view taken along the cutting line III-III of FIG.

4 to 7 are perspective views sequentially showing a method of manufacturing a composite file of the first embodiment of the present invention

8 and 9 are perspective views showing step by step a method of manufacturing a composite file of the second embodiment of the present invention

FIG. 10 is an exploded perspective view illustrating a modification of the steel pipe of FIG. 9.

11 and 12 are perspective views showing another embodiment of the composite pile of the present invention

13 is a perspective view showing a method of placing concrete in a closed steel pipe pipe

14 is a perspective view of a composite file of a second embodiment of the present invention;

15 is an exploded perspective view showing a modification of FIG.

FIG. 16 is a cross-sectional view taken along the cutting line VI-VI of FIG. 15.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a composite pile according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along cut line II-II of FIG. 1, and FIG. 3 is a cross-sectional view taken along cut line III-III of FIG. 1.

As shown in these figures, the composite pile of the first embodiment of the present invention is a concrete pillar 100 consisting of both end surfaces and sides, both ends are fixed to both end surfaces of the concrete pillar, respectively, the concrete pillar The tension member 110 to apply a compressive force to the formed, and is formed to surround a portion of the side of the concrete pillar 100, includes a steel pipe pipe 200 is formed with a number of concrete pouring hole (210).

The concrete pillar 100 is formed by installing the lower shoe 101 and the upper shoe 102 formed of steel sheets on both ends of the cylindrical concrete pipe. Tensile member 110 is connected to the lower shoe 101 and the upper shoe 102 at both ends, the concrete is cured in the tensioned state to apply prestress to the concrete pillar 100, the concrete is cured After applying a compressive force to the concrete pillar (100). The upper shoe 102 and the lower shoe 101 may be uninstalled as needed, and may be replaced with another member.

Steel pipe 200 is installed on the outer surface of the longitudinal portion of the concrete pillar 100, so that the composite pile is formed. However, unlike the conventional composite pile, the concrete pillar 100 is located on the inner circumferential surface of the steel pipe pipe 200.

The inner circumferential surface of the steel pipe 200 is formed with synthetic concave-convex 220 for synthesis with the concrete pillar. Synthetic concave-convex 220 may be formed by welding a bolt, wire, and the like therein. However, welding such a separate member to the inner circumferential surface of the steel pipe 200 is difficult to manufacture, so that a commercially available deck plate is rolled in a circle and welded to form a steel pipe pipe shape, as shown in FIG. 2. The folded portion of the plate may protrude inward to serve as the synthetic concave-convex 220.

In addition, the corrugated pipe 200a may be used as shown in FIG. 11, or the deck plate 200b may be rolled diagonally as shown in FIG. 12.

Concrete pouring hole 210 is formed to be able to easily pour concrete into the steel pipe 200 in the manufacturing process. That is, during manufacturing, the steel pipe pipe 200 is inserted into one end of the rebar assembly including the tension member 110 disposed in a cylindrical shape, and then the concrete is poured. It is necessary to pour concrete on the side of 200), but due to the rebar assembly, it is very difficult to pour concrete on the side. Therefore, the concrete placing hole 210 is formed in the steel pipe pipe 200, it is possible to easily pour concrete into the steel pipe pipe 200.

Concrete placing hole 210 is formed long in the longitudinal direction, it is preferable that the plurality of concrete placing holes 210 are disposed so as to be offset from each other. However, the concrete pouring hole is not necessarily to be formed, and may be formed of the steel pipe pipe 200 without the concrete pouring hole 210 as shown in FIG. 14.

As described above, the composite pile of the first embodiment of the present invention synthesizes a part of the concrete pile into a steel pipe pile to be integrally formed, thereby significantly reducing the cost for joining the concrete pile and the steel pipe pile in the construction process.

In addition, since the concrete pile and the steel pipe pile are synthesized and molded, even if the thickness of the steel pipe pile is thin, sufficient load bearing capacity can be exhibited. As a result, material costs (since steel pipes are much higher than concrete) can be reduced.

In addition, since the concrete pile is integrally molded, the impact force transmitted from the hammer during construction is directly transmitted to the lower portion, and thus the workability is much better.

The manufacturing method of the synthetic pile according to the first embodiment of the present invention is described below.

4 to 7 are perspective views sequentially showing a method of manufacturing a synthetic pile according to the first embodiment of the present invention.

In the method of manufacturing a composite pile according to the first embodiment of the present invention, the method includes preparing a reinforcing bar assembly 112 in which a plurality of tension members 110 are disposed in a length direction (FIG. 4), and at one end of the reinforcing bar assembly 112. Fitting a cylindrical steel pipe pipe 200 (FIG. 4), fitting the reinforcing bar assembly 112 and the steel pipe pipe 200 into the lower formwork 60 (FIG. 5), and the reinforcing bar assembly 112 Fixed to one end of the lower formwork 60, the other end is coupled to the tensioning device (62 ~ 63) (Fig. 6), and the concrete is put into the lower formwork (60), the lower formwork Fastening the upper formwork to the step (FIG. 7), driving the tensioning devices 62 to 63 to tension the tension member 110, and curing after centrifugal molding in the tensioned state of the tension member. Disengage the tensioning device and remove the upper formwork and the lower formwork; It includes the steps:

In the preparing of the reinforcing bar assembly 112, the tension member 110 is disposed in a cylindrical shape, and the connecting wire 111 is wound in the circumferential direction to form a cylindrical rebar assembly 112.

In the fitting of the steel pipe pipe 200, one end of the reinforcing bar assembly 112 is inserted into the hollow of the steel pipe pipe 200, and then the upper shoe 102 and the lower shoe 101 are assembled to both ends of the reinforcing bar assembly 112. . In the exemplary embodiment of the present invention, the upper shoe 102 and the lower shoe 101 are exemplified at both ends, but various members may be combined. For example, a tip extension reinforcement plate having a diameter larger than that of the synthetic pile may be combined.

The method of fixing one end of the reinforcing bar assembly 112 to the lower formwork 60, the lower shoe 101 (in the embodiment of the present invention, but fixing the lower shoe side may be fixed to the upper shoe side). It is fixed with, and the fixing plate 65 having a diameter larger than the lower shoe 101 is arranged to be supported at the end of the formwork.

The tensioning devices 62 to 63 are tension support plates 62 to which the upper shoe 102 or the tension member 110 is fixed, a curling plate 63 abutting the other end of the lower mold, and the curling plate 63. It is connected to the center is configured to be moved forward and backward and one end is fixed to the support shaft 62 and the tension shaft (63a), and a tension jack (not shown) connected to the tension shaft to apply a tensile force to the tension shaft It is composed.

The tensioning member 110 is tensioned by driving a tensioning device for tensioning the tensioning member. At this time, the tensile force is transferred to the path of the jack for tension → tension axis → tension support plate → upper shoe plate → tension member → fixed plate.

After tensioning using the tensioning device, the relative position of the tension axis (63a) and the copper plate (63) is fixed with a nut.

As described above, the steel pipe pipe, the concrete pouring hole 210 is formed on the surface of the steel pipe pipe so that the concrete can be introduced into the inside, the concave-convex 220 is formed on the inner peripheral surface of the steel pipe pipe. In particular, in order to form such irregularities more easily, the steel pipe pipe is preferably formed by wrapping the deck plate in a circular shape.

In the step of pouring concrete, concrete is poured in the amount required on the upper surface of the lower formwork. At this time, the part surrounded by the steel pipe pipe 200, the concrete is easily evenly introduced into the interior through the concrete pouring hole (210). Therefore, even after centrifugal molding, the thickness of the side surface of the pile is formed uniformly.

After the concrete is poured through the concrete pouring hole 210, as shown in FIGS. 15 and 16, before fastening the upper formwork to the lower formwork 60, a blocking plate ( 211) may be further included. Synthesis protrusion 212 is formed to protrude on the surface of the blocking plate 211 in contact with the concrete, the support portion 213 that can support the blocking plate 211 is coupled to the steel pipe pipe near the concrete pouring hole (210). It is. Synthesis protrusion 212 has the effect of increasing the synthetic force of the concrete block plate, such as stud bolts. By providing the blocking plate 211, it is possible to prevent the concrete is exposed to the portion through which the steel pipe is coupled through the concrete pouring hole 210.

As described above, according to the method of manufacturing a composite pile according to the first embodiment of the present invention, there is an advantage in that a synthetic pile in which a concrete pile and a steel pipe pile having a uniform thickness are integrally manufactured can be easily manufactured.

Although the first embodiment exemplifies pouring through the concrete pouring hole 210, when the concrete pouring hole 210 is not formed as shown in FIG. 14, the concrete is poured into the lower formwork as shown in FIG. 13. In, after inserting the concrete pressure pipe (10) into the inner side of the steel pipe pipe may be used to press the concrete to the inside of the steel pipe pipe.

8 and 9 are perspective views showing step by step a method of manufacturing a composite pile according to a second embodiment of the present invention.

As shown in these drawings, the method of manufacturing a composite pile according to a second embodiment of the present invention comprises the steps of preparing a reinforcing bar assembly 112 in which a plurality of tension members 110 are disposed in the longitudinal direction (Fig. 8), and the reinforcing bar Disposing the lower steel pipe pipe 1210 cut in half at one lower end of the assembly 112, and disposing the lower formwork 60 at the bottom of the reinforcing assembly 112 and the lower steel pipe pipe 1210. (FIG. 8), and fixing one end of the reinforcing bar assembly 112 to one end of the lower formwork 60, and coupling the other end to the tensioning devices 62 to 63 (FIG. 9), and the lower formwork ( 60) and the concrete is introduced into the lower steel pipe pipe 1210, the upper steel pipe pipe 1220 is positioned on the upper portion of the lower steel pipe pipe 1210, and fastening the upper formwork 70 to the lower formwork (60). Step (FIG. 9) and the tension device 62 to 63 to drive the tension member And curing after the centrifugal molding in the tensioned state of the tension member, releasing the coupling with the tensioning device, and removing the lower formwork and the upper formwork.

The feature of the second embodiment is that, unlike the first embodiment, the steel pipe pipe is divided into a lower steel pipe pipe 1210 and an upper steel pipe pipe 1220 to pour concrete. This is much easier to pour concrete than in the first embodiment, so that the concrete can be poured more homogeneously.

The inner circumferential surfaces of the lower steel pipe pipe 1210 and the upper steel pipe pipe 1220 are formed to protrude concavo-convex 1230 for concrete synthesis. Concrete concavities and convex (1230) may be used for a variety of members, such as synthetic bolts, rebar.

The other configuration is similar to the method of manufacturing the synthetic pile of the first embodiment, and thus detailed description thereof will be omitted.

On the other hand, after placing the upper steel pipe pipe on the upper portion of the lower steel pipe pipe, before fastening the formwork to the lower formwork, as shown in Figure 10, the lower steel pipe pipe 1210 and the upper steel pipe pipe ( Fixing 1220 by fastening means 1211, 1212, 1221, 1222, 1201 is more advantageous for securing the upper and lower steel pipe pipes and increasing the rigidity after formation of the composite pile.

The fastening means includes fastening holes 1212 and 1222 formed in portions 1211 and 1221 opposed to the lower steel pipe pipe and the upper steel pipe pipe, and fastening bolts 1201 fastened to the fastening holes 1212 and 1222. It is configured to include. However, the present invention is not limited thereto, and may be fixed to one of the facing portions 1221 or 1221, and may be configured to be coupled to the fastening hole 1212 or 1222 formed in the other by a snap fit method.

Claims (15)

Concrete pillars consisting of both ends and sides; A tension member having both ends fixed to both end surfaces of the concrete pillar and applying a compressive force to the concrete pillar; And A steel pipe pipe formed to surround a part of the side of the concrete pillar and having a plurality of concrete pouring holes formed therein; Including; The concrete pillar body is a composite pile, characterized in that the region in which the steel pipe pipe is wrapped, the region is exposed to the side of the concrete pillar body as it is divided over the entire length. The method of claim 1, Synthetic pile, characterized in that the synthetic concave-convex for synthesis with the concrete pillar on the inner peripheral surface of the steel pipe pipe. In the composite file manufacturing method, Preparing a reinforcing bar assembly in which a plurality of tension members are disposed in a longitudinal direction; Fitting a cylindrical steel pipe pipe shorter than the entire length of the composite pile to one end of the reinforcing assembly so as to surround a portion in the longitudinal direction of the composite pile; Inserting the reinforcing bar assembly and the steel pipe into a lower formwork; Fixing one end of the reinforcing bar assembly to one end of the lower formwork and coupling the other end to the tensioning device; Injecting concrete into the lower formwork and fastening the upper formwork to the lower formwork; Driving the tension device to tension the tension member; Curing after centrifugal molding in the tensioned state of the tension member; And Disengaging the tensioning device and removing the upper formwork and the lower formwork; Composite file manufacturing method comprising a. The method of claim 3, wherein Concrete pouring hole is formed on the surface of the steel pipe to allow concrete to flow into the interior, When the concrete is put into the lower formwork, the composite pile manufacturing method characterized in that the concrete is introduced into the steel pipe pipe through the concrete pouring hole. In claim 3 or 4, Synthetic pile manufacturing method characterized in that irregularities are formed on the inner peripheral surface of the steel pipe. The method of claim 5, The steel pipe pipe is a composite pile manufacturing method, characterized in that formed by wrapping the deck plate in a circle. The method of claim 4, wherein Installing the blocking plate in the concrete pouring hole after the concrete is poured through the concrete pouring hole and before the upper formwork is fastened to the lower formwork; Composite file manufacturing method characterized in that it further comprises. The method of claim 7, wherein Synthetic pile manufacturing method characterized in that the projection for the synthesis formed on the surface of the blocking plate in contact with the concrete. The method of claim 3, wherein In the step of injecting concrete into the lower formwork, the composite pile manufacturing method characterized in that the concrete is fed to the inside of the steel pipe pipe after inserting the concrete pressure pipe into the inside of the steel pipe pipe. In the composite file manufacturing method, Preparing a reinforcing bar assembly in which a plurality of tension members are disposed in a longitudinal direction; Arranging a lower steel pipe pipe, which is cut in half at one lower end of the reinforcing bar assembly and shorter than a length of the composite pile; Disposing a lower formwork below the reinforcing bar assembly and the lower steel pipe pipe; Fixing one end of the reinforcing bar assembly to one end of the lower formwork and coupling the other end to the tensioning device; Injecting concrete into the lower formwork and the lower steel pipe pipe, placing an upper steel pipe pipe on the upper portion of the lower steel pipe pipe, and fastening the upper formwork to the lower formwork; Driving the tension device to tension the tension member; Curing after centrifugal molding in the tensioned state of the tension member; And Uncoupling the tensioning device and removing the lower formwork and the upper formwork; Composite file manufacturing method comprising a. The method of claim 10, The inner circumferential surface of the lower steel pipe and the upper steel pipe pipe, the composite pile manufacturing method characterized in that the protrusions formed for the synthesis of concrete. The method of claim 10, After placing the upper steel pipe pipe on the upper portion of the lower steel pipe pipe, before fastening the formwork to the lower formwork, manufacturing the composite pile, characterized in that for fixing the lower steel pipe pipe and the upper steel pipe pipe by a fastening means. Way. The method of claim 12, The fastening means is a composite pile manufacturing method comprising a fastening hole formed in a portion facing each other in the lower steel pipe and the upper steel pipe pipe, and a fastening bolt fastened to the fastening hole. Concrete pillars consisting of both ends and sides; A tension member having both ends fixed to both end surfaces of the concrete pillar and applying a compressive force to the concrete pillar; And Steel pipe pipe formed to surround a portion of the side of the concrete pillar; Including; The concrete pillar body is a composite pile, characterized in that the region in which the steel pipe pipe is wrapped, the region is exposed to the side of the concrete pillar body as it is divided over the entire length. The method of claim 1, Synthetic pile, characterized in that the synthetic concave-convex for synthesis with the concrete pillar on the inner peripheral surface of the steel pipe pipe.

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