KR101171285B1 - Attachable joint apparatus of the different sized pile for foundation work - Google Patents

Abstract

In the present invention, the lower pile deeply embedded in the ground during the foundation work of the soft ground uses a file having a large diameter, and the strength of the joint portion to which the upper pile of the small diameter connected to the connection is strengthened, the pile or the joint The present invention relates to a joint of a pile having different specifications so as not to cause damage or deformation in the apparatus.

An upper pile having a coupling plate formed at a lower portion thereof, having a welding surface on the side thereof, and having a smaller size than the lower pile,

A joint device fixed by welding through the welding surface of the upper pile and having a plurality of reinforcing plates between the upper disk and the lower disk,

A lower pile coupled through the joint device and having a larger size than an upper pile,

Consists of an annular ring that is fixed to the side of the upper disk and the lower disk of the joint device, the upper and lower piles are integrated through the joint device and the annular ring,

It characterized in that the diameter of the upper, lower disk and the lower pile of the joint device correspond to and match each other.

 Upper pile, lower pile, concrete pile, joint device, upper disk, lower disk, annular ring

Description

ATTACHABLE JOINT APPARATUS OF THE DIFFERENT SIZED PILE FOR FOUNDATION WORK}

The present invention relates to a joint device of a PHC pile deeply connected by connecting two or more to the soft ground at the time of the foundation work of civil engineering or building construction, and more specifically, the lower part deeply driven into the ground during the foundation work of the soft ground. The file is a standard that can be used conveniently and safely in the construction site by using a file with a large size, and strengthening the strength of the joint part to which the small sized upper file is connected so as not to cause damage or deformation in the file or the joint device. This relates to the joint of different files.

Among the countermeasures for stability and settlement problems of soft ground-based structures, the method of reaching fill layer using fill load (PILE method) is the pre-produced steel pipe pile or PHC, PC, RC, etc. The construction of ready-made concrete piles by the method of hitting or reclamation, and the construction of the pre-digging method of hitting the pile after the excavation and hitting it with the drop hammer and the hitting technique of direct hitting with the hydraulic hammer.

In particular, the PHC pile (Pretentioned spun High strength Concrete Piles) is a high-strength pile with a pretension method of concrete compressive strength of more than 78.5N / (800Kgf /) made by applying centrifugal force, the allowable compressive stress of concrete is very large It can withstand greater axial loads than PC piles, and evenly introduces prestress required in sections formed from concrete with a compressive strength of 800 Kgf / or more. Because it completely absorbs the tensile stress caused by the cracks, it also easily penetrates the middle hard layer, which is difficult to hit with conventional PC piles, and thus has the advantage of being able to penetrate deeper and harder layers. have.

In the conventional PHC pile configured as described above, one example of the conventional PHC pile is shown in FIGS. 1 and 2 when the depth of the pile is varied or connected up and down according to the size of the building to be constructed or the state of the geology. .

The lower joint cap 10 'of FIG. 1 has a PC steel wire 7 coupling hole 3, 3' arranged at regular intervals with the hollow portion 5 at the center of the support disc 1, and has an outer periphery. The inclined surface for welding and the reinforcing band 2 are formed. In contrast, the pile upper joint cap 10 ′ has the same configuration as the lower joint cap 10, but the inner end of the hollow part 5 of the support disc 1. It consists of a configuration in which the induction band 4 is bent in a ring shape and welded.

The coupling state between the conventional upper and lower PHC piles having such a structure is illustrated in FIG. 2. Referring to the coupling state between the upper and lower PHC piles, the upper portion of the lower joint cap 10 ′ of the lower PHC pile is first shown. Using the guide band 4 of the upper joint cap of the PHC pile, the weld 9 is constructed along the welding slope 6 with the upper and lower PHC piles 8 and 8 'coupled together. Long pole pile is composed and used for foundation work by driving at work site.

In addition, a method of using a separate jointing device (utility model registration No. 345924) that combines files by bolt fastening has been proposed.

That is, the joint device of the pre-registered concrete pile is formed in the center of the hollow portion of the pile is the same as the inner diameter of the hollow portion of the pile, the outer diameter is the same as the outer diameter of the pile (PC) of the upper pile (Prestressed Concrete ) The upper disc 21 in which the through-hole 21a is perforated at the position corresponding to the nut 11a, and the hollow part which is the same as the inner diameter of the hollow part of the lower pile 12 is formed in the center, and the outer diameter is It is the same and integrated between the lower disc 22 and the upper disc 21 and the lower disc 22 in which the through hole 22a is perforated at a position corresponding to the PC nut 12a of the lower pile 12. Consists of a central pipe 23 and a plurality of reinforcing plates 24 in the radial direction. The components are all made of steel and are integrally connected to each other by welding.

Both the upper pile 11 and the lower pile 12 are made of concrete, and in order to increase the strength, the PC nut 12a is embedded at the top and the bottom thereof, and a PC steel bar 12b is installed in the longitudinal direction between the piles. By pre-stressing, the file strength is increased.

And to the lower end of the upper pile 11 and the upper end of the lower pile 12 to fasten the reinforcing bands (11c) (12c) to prevent breakage of the concrete, respectively.

 A method of connecting the lower pile 12 and the upper pile 11 using the above-described joint apparatus 20 will be described.

 First, the lower pile 12 is driven (박) and put on the ground, and then the coupling device 20 is placed on the upper portion of the lower pile 12. Fastening to the PC nut 12a of the lower pile 12 while penetrating the bolt 26 through all the through holes 22a of the lower disk 22, and then the upper pile 11 on the joint device 20 Put the bolts 25 through each of the through holes 21a of the upper disc 21 and fasten to the PC nut 11a of the upper pile 11.

However, in the case of the above-mentioned file jointing device, it is not possible to solve the general disadvantage that the pile itself has a large strength but a small construction strength due to the construction of connecting up and down files of the same size.

To solve this problem, EXT-PILE has been proposed. In the case of the head extension file, the extension body is welded to the tip of the ready-made file so that the body of the file is small and only the tip is enlarged so that the file itself has its own construction. The plan to take full advantage of the history was emerging.

However, when the type method is used in the head-extended pile, the steel plate of the extended tip may cause deformation during driving.In case of using the embedding method, it is necessary to drill a wider hole larger than the pile body during drilling. It is difficult to maintain, and because of the heavy hammer to be stiff for the support of the end of the force was applied to the end of the force was to break easily.

The present inventor has been struggling to solve such a problem, using a file having a large size at the bottom, and using a file having a small size at the top and the middle can be close to the construction history by fully utilizing the file itself of all files. While there has been a search for a solution, there has been no joint to combine files of different specifications.

The present invention is to solve the above problems,

An object of the present invention is to use a file of a large standard, the file of the lower part embedded in the ground, and to connect the file of the upper of the small standard to be used to connect the joint of the file of different standards that can fully utilize the strength of the file itself It is to provide.

Another object is to provide a jointing device of a file having a different specification with excellent construction workability of the pile by allowing the jointing device is installed on the upper file when the lower pile of the large file and the upper file of the small file is combined.

Another object is to provide a jointing device of a file having a different specification in which the strength of the jointing device connecting the lower pile and the upper pile is strengthened so that no breakage or deformation of the jointing part occurs.

The joint of the pile of different standards of the present invention is formed with a coupling plate on the lower side, has a welding surface on the side, the upper pile relatively smaller than the lower pile,

A joint device fixed by welding through the welding surface of the upper pile and having a plurality of reinforcing plates between the upper disk and the lower disk,

A lower pile coupled through the joint device and having a larger size than an upper pile,

Consists of an annular ring that is fixed to the side of the upper disk and the lower disk of the joint device, the upper and lower piles are integrated through the joint device and the annular ring,

It characterized in that the diameter of the upper, lower disk and the lower pile of the joint device correspond to and match each other,

A plurality of bolts are inserted between the through hole of the lower disk and the through file of the lower pile constituting the joint device so that the upper file and the lower pile form one long pole pile.

In addition, the reinforcing plate is composed of a plurality of vertical plates extending radially at a predetermined angle interval between the upper disk and the lower disk, the reinforcement plate is characterized in that each through hole is formed,

The annular ring is formed with an incision surface cut in the vertical direction, characterized in that it is coupled to the reinforcement plate through the bolt by forming a number of through holes on the side.

The present invention mass-produces the upper pile formed with a joint device, and the concrete pile is firmly fixed through the joint device of the upper pile, and the joining process of the upper pile and the joint device can be omitted during the joining process of the files having different specifications. Since the process can be simplified during construction, it is easy to work in the construction site.

In addition, the present invention provides a joint device formed integrally with the upper pile to prevent the crack of the weld due to the impact at the time of driving, the rapid corrosion of the weld, the reduction in strength of the concrete due to the transmission of the welding heat, and the like to the safe steel pipe and PHC File joints can be provided.

In addition, the present invention uses the joint and the annular ring when connecting the upper pile and the lower pile to distribute the driving force evenly, and also a plurality of reinforcement plate, the annular ring forming a vertical bearing to form a grid structure with each other Since the vertical drag can be evenly distributed, the vertical drag is evenly distributed on the front end of the pile, thereby preventing damage to the pile joint and increasing strength.

In the present invention, when the files of different standards are combined, the lower file can be fastened through the above joint device when the upper file is used at D500mm, and the upper file is D400mm. If only 30% of the tip is used for the basic construction with D500mm, the overall effect of embedding with D500mm pile can be obtained.

In addition, the length of the lower pile of the tip can be freely adjusted according to the condition of the soil and the length of the pile. There is.

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

Figure 4 is an exploded perspective view of the components used in the joint of the concrete pile of the present invention.

The upper pile 40 and the lower pile 50 themselves represent piles having reinforcing bands 41 and 51 formed at ends thereof as general PHC piles, and are produced in different sizes.

In the present invention, the upper pile has a small diameter and the lower pile uses a large diameter pile. For example, the upper pile 40 has a diameter of 400 mm, and the lower pile 50 uses a 500 mm standard product. The case will be described.

In the formation of the upper pile 40, a circular coupling plate 44 integrally formed with the upper pile has a plurality of peanut holes 45 formed around the circle, and a fixed coupling portion 46 is formed at the bottom thereof. Such a structure is the same as that of the induction band 5 of FIG. 1 and has a welding surface 62a (9 in FIG. 1) described later on its side.

The coupling plate 44 forms a through hole at the center, and forms a plurality of peanut holes 45 at which the wool bone is fixed at a position corresponding to the wool bone on a circumference between the outer peripheral end portion and the through hole at regular intervals. After the wool bone 43 is inserted into the large hole of the peanut hole, the transverse pressure is applied, and the wool bone 43 is inserted into the small hole of the peanut hole 45 to be fixed.

In addition, the joint device 60 fixed to the coupling plate 44 is composed of an upper disc 61 and a lower disc 65, and the lower disc 65 has a plurality of reinforcement having fixing holes 66 formed therein. The plate 64 is installed in an annular shape, and a plurality of through holes 65a are formed between the reinforcing plates so that the bolts 63 are fixed and formed on the upper end of the lower concrete pile 50. Through-holes 65a are formed at positions corresponding to the plurality of PC nuts 51a each configured.

The annular ring 70 is cut in the vertical direction, and is formed of elastic steel so as to open the incision. The annular ring 70 having a plurality of through holes 72 formed therein is connected to the joint device ( The fixing hole 66 of the reinforcing plate 64 in the middle of the upper disk 61 and the lower disk 65 of the 60 is configured to be fastened through the bolt 71.

The annular ring 70 is one portion is vertically cut as shown in the drawing, but if necessary, the two corresponding parts are cut in the vertical direction may be used in two separate.

Here, the joint device 60 and the annular ring 70 are formed to correspond to the diameter of the lower pile 50, and the upper pile 40 having a small diameter at the top through the joint device 60 and the annular ring 70. ) And the relatively large lower pile 50 is fixed to each other.

Accordingly, when the upper pile is mass-produced, the upper disk 61 constituting the joint device 60 is welded to the existing upper pile 40 as shown in FIG. 5, and the lower pile 50 uses the existing pile as it is. The lower disc 61 and the lower pile 50 of the joint device 60 are coupled to each other by bolts and fastened to the annular ring 70.

That is, as shown in the figure, the joint device 60 is fixed to the lower portion of the upper pile 40, and the through hole 65a of the lower disc 65 of the joint apparatus and the through hole 51a of the lower pile. To match the holes to secure the lower pile 50 in the joint with a plurality of bolts (63).

Next, the annular ring 70 is inserted between the upper disc 61 and the lower disc 65 of the joint device 60 and the fixing hole 66 of the reinforcement plate 64 fixed between the upper disc and the lower disc. ) And the through-hole 72 of the annular ring 70 is fixed and then fixed with a bolt 71 to be integrated.

At this time, using the jig to open the incision to the annular ring 70 is located between the upper and lower discs, and is fixed as a bolt around the incision of the annular ring so that it can be fixed symmetrically to apply a certain fixing force It works.

This will be described in detail with reference to FIG. 6.

Figure 6 is a cross-sectional view showing a state in which the upper pile and the lower pile are respectively different diameter in the present invention.

As shown in this cross-sectional view, the upper pile 40 is mass-produced in a state where the upper disk 61 and the lower disk 65 constituting the jointing apparatus are integrally fixed.

At this time, the wool core 43, which is a steel core inserted into the concrete pile, which is the upper file, is taken out and inserted as shown in the peanut hole of the upper disc 61 of the joint device 60 to produce the upper pile 40.

As such, the concrete pile of the upper pile 40 and the concrete pile of the lower pile 50 in which the joint device 60 is integrally formed are combined as follows.

First, the lower pile 50 is driven to the ground to be fixed to the ground, and then the annular ring 70 is cut into the body of the upper pile 40 is inserted into the upper portion of the joint device 60 Position it.

Next, when the upper pile 40 is placed on the lower pile 50, the joint device 60 having a diameter corresponding to and matching the lower pile 50 is positioned above the joint pile 60 as shown in FIG. 6. The bolt 63 is inserted into the through hole 65a and the through hole 51a of the lower pile 50 formed in the lower disc 57 of the bottom plate 57. Thus, using a plurality of bolts to secure the joint of the lower pile and the upper pile 60, and then to secure the annular ring 70 in the upper upper pile.

That is, when the annular ring 70 placed on the upper part of the joint device 60 is opened using a jig, it is placed on the side of the joint device 60 of the upper pile. Will remain coupled.

 Since the cutout is formed in the annular ring 70 to cover a certain length, the annular ring 70 can be easily combined with the joint device.

In this state, the annular ring is inserted into the fixing hole 66 in the reinforcing plate 64 of the coupling device 60 while penetrating the through hole of the annular ring 70 using the bolt 71. It can be tightened firmly.

After connecting the upper pile formed with the joint device 60 of the present invention and the lower pile, which is a general concrete pile, as described above, the upper pile of the upper pile 40 is driven to simultaneously pile the upper and lower piles 40 and 50 on the ground. It gets stuck.

 At this time, the driving force is applied to the upper disc 61 of the upper pile 40, but the driving force is distributed in the reinforcing plate 64 and the annular ring 70 and transmitted to the lower disc 65, and the lower disc in the lower disc Since the pile is driven into the ground by applying the driving force to the pile, the driving force is not intensively applied to any part, so that the concrete pile and the joint are not damaged or deformed.

Particularly, in the present invention, the lower file uses a file having a large size, and the upper file can be constructed using a file having a small size through a joint device, so that its own strength of each file can be approached to the construction strength. You can do that.

1 is a perspective view showing a conventional concrete pile joint device,

Figure 2 is a cross-sectional view showing a state in which the conventional concrete pile joint device is fixed to each other through welding,

Figure 3 is a perspective view showing a state in which the joint of the conventional concrete pile joint is fixed to each other in a bolted manner,

4 is an exploded perspective view showing a joint of a pile of different standards of the present invention;

Figure 5 is a perspective view showing a working state in which the lower file is connected to the upper file connected to the joint device in the present invention,

6 is a cross-sectional view showing a state in which the upper pile and the lower pile is coupled through the joint apparatus in the present invention.

Description of the Related Art

40: Upper file 50: Lower file

41, 51: reinforcing band 43: wool bone

60: connecting device 45: peanut hole

61: upper disc 63, 71: bolt

64: reinforcing plate 66: fixing hole

65: lower disc 51a, 65a, 72: through hole

70: annular ring

Claims (4)

It is formed by combining a plurality of reinforcing plate 64 between the upper disk 61 and the lower disk 65 and the upper disk 61 and the lower disk 65, the annular ring 70 at the end of the reinforcing plate In the connection structure of the upper pile and the lower pile connected by a joint device made by combining, The upper pile is formed relatively smaller than the lower pile, formed by integrating the circular coupling plate 44 coupled to the pile coupling device 60 at the lower end thereof, forming an outer diameter smaller than the pile coupling device, The lower pile is formed to have a relatively larger size than the upper pile, and has the same outer diameter as the pile joint device, The circular coupling plate 44 forms a through hole in the center, and forms a plurality of peanut holes 45 at a predetermined interval on a circumference between the outer circumferential end and the through hole at a position corresponding to the wool bone of the upper pile. In the center of one side is formed by protruding the cylindrical fixed coupling portion 46 inserted into the upper disk 61 of the pile joint device, and forming a welding surface (62a) on the outer circumference of the circular coupling plate, the inside of the upper pile Coupled to a number of wool bones formed, The reinforcement plate 64 is composed of a plurality of vertical plates extending radially at regular intervals between the upper disk 61 and the lower disk 65, the reinforcing plate 64, each through hole 66 Is formed, The annular ring 70 is formed with a cutting surface cut in the vertical direction, the plurality of through-holes 72 are formed on the side is characterized in that the combination is coupled to the reinforcement plate 64 through the bolt 71 Joints of different files delete delete delete

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