KR20100086162A - Attachable and detachable joint apparatus of steelpipepile and concretepile for foundation work - Google Patents

Abstract

PURPOSE: An attaching/detaching coupling device for a concrete pile and a steel pipe pile is provided to improve joint strength and support strength by preventing damage to the joint of a steel pipe pile and a concrete pile. CONSTITUTION: An attaching/detaching coupling device for a concrete pile and a steel pipe pile comprises following steps. An upper disk and a lower disk(61,65) which are a joint device(60) formed on the lower part of a steel pipe pile are integrated. A concrete pile(50) is fixed through the joint device of the steel pipe pile. The joint device is composed of the upper disk and the lower disk.

Description

ATTACHABLE AND DETACHABLE JOINT APPARATUS OF STEELPIPEPILE AND CONCRETEPILE FOR FOUNDATION WORK}

The present invention relates to a joint device of steel pipe piles and concrete piles deeply embedded by connecting two or more to the soft ground at the time of the foundation work of civil engineering or building construction. It strengthens the strength of the joints connecting concrete piles and steel pipe piles embedded in the ground during foundation work, so as not to cause breakage or deformation in concrete piles or joints. In particular, the construction of steel pipe piles and concrete piles is improved. The present invention relates to steel pipe piles and concrete piles that can be used conveniently.

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. As the construction of ready-made concrete piles by the method of hitting or reclamation, it is constructed by the pre-excavation method in which the pile is hit by the drop hammer after the excavation and the blow method using 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 6 for welding and the reinforcing band 2 are formed,

On the contrary, the pile upper joint cap 10 'has the same configuration as the lower joint cap 10, but the guide band 4 is banded and welded to the inner end of the hollow portion 5 of the support disc 1 in a ring shape. Consists of

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 files are constructed.

However, since the welding strength between the upper and lower PHC piles depends on the skill of the operator, it is easy to cause an imbalance in the strength of the weld. If the weld cross section is too thin and the weld strength drops, this results in cracking and damage of the weld. There is a problem that a typed file cannot achieve its original purpose.

In addition, a method of using a separate joint device (Utility Model Registration No. 345924) has been proposed to solve the problems caused by welding.

That is, the joint device of the pre-registered concrete pile is formed in the center of the hollow portion and the same as the inner diameter of the hollow portion of the pile, as shown in Figure 3, 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 concrete pile 12 are formed in the center, and the outer diameter is the outer diameter of the pile. And a lower disc 22 having a through hole 22a drilled at a position corresponding to the PC nut 12a of the lower pile 12 and between the upper disc 21 and the lower disc 22. It consists of a central tube 23 integrally connected 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, which is a concrete pile, is driven and driven into 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.

 Conventional concrete pile joint device 20 as described above can not solve the problems caused by the above welding because the welding, but the reinforcing plate 24 connecting the upper disk 21 and the lower disk 22 is radial Since it is formed, the portion between the adjacent reinforcement plate 24 and the reinforcement plate 24 of the upper disc 21 cannot be reinforced, so that the portion between the teeth of the upper disc 21 at the time of driving is down.

As a result, the driving force is not evenly transmitted to the upper surface of the lower pile 12 and is concentrated on the part with the reinforcement plate 24 and the part with the central tube 23, and the concrete of this part is damaged. As long as the strength of the file is reduced.

As such, the structural improvement of the joint device for maintaining the pile strength when the concrete pile and the concrete pile are combined has been needed. Moreover, in order to reduce the construction cost and maximize the support capacity, the upper part is studying the construction method with high strength steel pipe pile and the lower part with low strength and low price concrete pile. As a result, the structural improvement of the joint of the joint and the upper and lower piles was required.

The present invention is to solve the above problems,

An object of the present invention is to connect the upper steel pipe pile to the concrete pile of the ground embedded in the ground to strengthen the strength through the lattice structure and to transfer the load and load load concentrated on some sections to the shear surface of the concrete pile in a uniform distribution It is to provide a removable pipe joint device of the steel pipe pile and concrete pile to improve the joint strength and support strength by preventing damage or deformation of the joint portion.

This object can be achieved by providing a steel pipe pile integrally formed with a joint device, and improving the structure of the joint portion of the joint device and the lower concrete pile connected to the steel pipe pile.

Another object is to provide a removable pipe joint of steel pipe piles and concrete piles that can be easily assembled and disassembled by simplifying the joining process when joining steel pipe piles and concrete.

It is an object to provide a removable pipe joint of a steel pipe pile and a concrete pile, which can be achieved by providing a steel pipe pile formed integrally with a joint device and omitting a process connected with the steel pipe pile.

Detachable joint device of the steel pipe pile and concrete pile of the present invention and the upper disk having a connection surface installed upright,

A lower disc having a lateral reinforcement cap formed thereon and a plurality of through holes formed therein;

A plurality of reinforcing plates formed between the upper disk and the lower disk;

To form a steel pipe pile connected to the reinforcement plate formed by forming a lattice structure to form a joint device integrally formed with a vertical support ring to maximize the vertical drag,

It is characterized in that the lateral reinforcement cap formed of a lower reinforcing plate and the lower fixing plate with a peanut hole in the interior of the lower reinforcement band through the joint and the annular ring of the steel pipe pile is bolted to the concrete pile embedded, The upper disc and the steel pipe pile having the connection surface installed in the device are characterized in that the inner surface of the connection surface and the steel pipe pile is matched and then fixed by welding.

In addition, the one side of the peanut hole formed in the lower fixing plate of the lower concrete pile, the wool bone (PC steel bar) is inserted and fixed, the other hole is fastened by bolts, characterized in that the reinforcing plate between the upper disc and the lower disc It consists of a plurality of vertical plates extending radially at intervals of a predetermined angle, characterized in that formed integrally with the vertical support ring connected in succession.

The present invention is to mass-produce the steel pipe pile formed with a joint device, and to ensure that the concrete pile is firmly fixed through the joint device of the steel pipe pile construction can be omitted because the coupling process between the steel pipe pile and the steel pipe pile Since the process can be simplified, the work in the construction site is easy.

In addition, the present invention provides a joint device formed integrally with the steel pipe pile to prevent the crack of the weld due to the impact at the time of driving, the rapid corrosion of the weld, the strength reduction of the concrete by the transfer of welding heat, etc. File joints can be provided.

In addition, the joint according to the present invention is combined with the annular ring, so that the driving force is evenly distributed and transmitted to the lower part, so that no damage and deformation of the concrete pile and the joint are not caused, and the lateral reinforcement cap is used at the bottom of the joint. It prevents head breakage of the lower pile at the time of driving and prevents the breakdown even if it is broken.

In particular, the present invention uses the joint device and the annular ring when connecting the steel pipe pile and concrete pile to distribute the driving force evenly, and also the vertical bearing ring, the reinforcement plate, the annular ring to form a grid structure to Evenly distributed and evenly distribute the vertical drag to the shear surface of the concrete pile by using the lower fixing plate and the lower reinforcement plate at the joint of the lower concrete pile to prevent damage and increase the strength of the pile joint, This prevents the effect of increasing stability.

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 removable joint device of the steel pipe pile and concrete pile of the present invention.

The upper pile is a steel pipe pile 40 made of a steel material, the concrete pile 50 is a horizontal pile cap 69 consisting of a lower reinforcing plate 55 and a reinforcing band 51 on the lower fixing plate 57 at the upper end of the concrete pile. The upper end of is reinforced.

The joint device 60 which is integrally connected with the steel pipe pile when the steel pipe pile 40 is formed is composed of an upper disc 61 and a lower disc 65, and a lateral beam integrally formed at the lower end of the lower disc 65. The steel cap 69 is constituted, and these components are all made of steel, and the upper disc 61 and the lower disc 66 are integrated by welding, and the lower disc 66 and the lateral beam of the joint device 60 are lateral. The steel cap 69 may be integrally formed by welding, or may be integrally formed by bolts.

The upper disc 61 has a connection surface 62 which is erected vertically, and this connection surface has a shape bent upward.

In the lower disc 65, a reinforcement plate 64 having a plurality of fixing holes 66 is installed upright, and a plurality of through holes 65a are formed between the reinforcement plates to fix the bolt 63. The through holes 65a are formed at positions corresponding to the plurality of peanut holes 51a in the lower fixing plate 57 of the lower concrete pile 50, respectively.

In addition, the plurality of reinforcement plates 64 radially installed on the upper portion of the lower disc 65 is formed so that the vertical bearing ring 68 is integrally formed to serve to disperse and transmit the driving force in the vertical direction to the lower portion. have.

And the annular ring 70 is formed of elastic steel cut in the vertical direction is configured to open the incision, the annular ring 70 is the upper disc 61 and the lower disc of the joint device 60 It is fastened through the bolt 71 between the fixing holes 66 of the reinforcement board 64 which is the support in the middle of 65.

The annular ring 70 is one portion is vertically cut as shown in the figure, but if necessary, the two corresponding portions are cut in the vertical direction may be used in two separate. A plurality of through holes 72 are formed in the annular ring 70, and in particular, through holes are formed in the incision to form a symmetrical force upon fixation.

Therefore, the lower disk 61, 65 is integrally fixed to the joint device 60 formed in the lower portion of the steel pipe pile 40, the concrete pile 50 through the joint device 60 of the steel pipe pile It will be described with reference to Figure 5 that is fixed.

As shown in the drawing, the joint 60 is fixed to the lower portion of the steel pipe pile 40, and the through hole 65a of the lower disc 65 of the joint and the lower fixing plate 57 attached to the upper end of the concrete pile. Peanut hole 51a is matched to insert the concrete pile 50 into the lateral reinforcement cap 69 of the fitting device 60, so that the concrete pile 50 in the fitting device is fixed 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.

6 is a perspective view showing in detail the lower fixing plate 57 of the concrete pile of the present invention.

In the drawings, the upper part is omitted that the concrete pile is formed, the concrete is filled in the interior of the reinforcing band 51 formed in succession to the lower fixing plate 57 to form a PHC pile.

The present invention improves the configuration of the fixing plate in such a concrete pile, the peanut hole 51a is formed at intervals in the circumferential direction of the lower fixing plate 57, and the number of lower reinforcing plates 55 between the peanut holes. ).

Here, the one hole of the peanut hole is a wool bone (PC steel bar) 53 is fastened and fixed, and the other hole is bolted to the bolt 63 as shown in Figure 5 to combine the steel pipe pile and concrete pile.

This will be described in detail with reference to FIG. 7.

7 is a cross-sectional view showing a state in which a steel pipe pile and a concrete pile are combined in the present invention.

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

At this time, in order to fix the upper disk 61 of the steel pipe pile 40 and the fitting device 60, the connection surface 62 of the upper disk and the inner side of the steel pipe 40 is matched and then welded through the welding portion (62a) It is fixed integrally.

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

First, the lower pile 50 is driven into the ground and then put the cut annular ring 70 on the upper jaw of the lower pile 50 has the same diameter as shown in Figure 7 because the upper outer of the lower pile 50 And to maintain a combined state, at this time put the steel pipe pile 40 connected to the joint device 60 on the upper surface of the concrete pile 50.

That is, the concrete pile in the lateral reinforcement cap 69 of the lower disc is inserted.

 Since the cutout is formed in the annular ring 70 so as to cover a certain length, the annular ring 70 can be easily mounted on the upper step of the lower pile 50.

Then, the bolt 63 is fastened to the peanut hole 51a of the lower fixing plate 57 of the lower concrete pile 50 while passing through the through hole of the lower disc 65 of the joint device.

 In this state, the annular ring 70 is disposed between the upper disc 61 and the lower disc 65 of the joint apparatus by moving upward while applying an impact upward to the lower end of the annular ring 70. At this time, the top and bottom of the annular ring 70 is the outer surface of the upper disk 41, the lower disk 65 and the annular ring 25 is the same plane.

In this state, the bolt 71 is fastened through the fixing hole in the reinforcing plate 64 formed between the upper disk and the lower disk while penetrating the through hole of the annular ring 70, so that the annular ring can be firmly fastened in the joint device. have.

After connecting the steel pipe pile and the concrete concrete pile of the concrete concrete pile formed with the joint device 60 of the present invention as described above to drive the upper end of the steel pipe pile 40, the concrete piles (40, 50) of the upper and lower parts at the same time to the ground do.

 At this time, the driving force is applied to the upper disc 61 of the joint device 40, but the driving force is dispersed by the reinforcing plate 64 and the vertical support ring 68, and is again distributed through the annular ring 70 The driving force is transmitted to the lower disc 65, and the driving force is evenly distributed by the lower fixing plate 57 and the lower reinforcing plate 55 coupled to the lower disc 65 through the lateral reinforcement cap 69 of the lower disc. It is transmitted to the pile 50, and in this case, the lateral reinforcement cap 69 is used to prevent head breakage of the lower pile 50 at the same time, and at the same time, there is a feature that can be prevented from being separated even if broken.

 Therefore, no crushing force is applied to any part, so that the concrete pile and the joint are not damaged or deformed.

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,

Figure 4 is an exploded perspective view showing the components of the joint of the steel pipe pile and concrete pile of the present invention,

Figure 5 is a perspective view showing a state in which the joint of the steel pipe pile and concrete pile of the present invention is fixed to each other by a bolted method,

Figure 6 is a perspective view showing in detail the lateral reinforcement cap of the concrete pile of the present invention,

7 is a cross-sectional view showing a state in which a steel pipe pile and a concrete pile are combined in the present invention.

Description of the Related Art

40: steel pipe pile 50: concrete pile

51: reinforcement band 53: Ulbon (PC steel bar)

55: lower reinforcing plate 57: lower fixing plate

60: coupling device 51a: peanut hole

61: upper disk 62: connection surface

63, 71: Bolt 68: Vertical support ring

64: reinforcing plate 66: fixing hole

65: lower disc 65a, 72: through hole

69: lateral reinforcement cap 70: annular ring

52: PC 62a: welded portion

Claims (6)

An upper disc 61 having a standing surface 62 mounted thereon; A lower disc 65 having a lateral reinforcement cap 69 formed thereon and a plurality of through holes 65a formed therein; A plurality of reinforcing plates 64 formed between the upper disk 61 and the lower disk 65; The steel pipe pile 40 is formed to be connected to the reinforcement plate 63 and constitutes a joint device 60 integrally formed with a vertical support ring 68 that opposes vertical drag. Through the joint device 60 and the annular ring 70 of the steel pipe pile of the concrete pile 50 consisting of a reinforcing band 51 and the lower reinforcing plate 55 in the lower fixing plate 57 is formed a peanut hole (51a) Detachable joint device of steel pipe pile and concrete pile, characterized in that is coupled to the lateral reinforcement cap 69 by a bolt (63) The method of claim 1, The upper disc 61 and the steel pipe pile 40 having the connecting surface 62 installed in the joint device 60 are fixed by welding after matching the inner diameters of the connecting surface 62 and the steel pipe pile 40. Attachment device for steel pipe pile and concrete pile The method of claim 1, Wool bones 53 are inserted into and fixed to one side hole of the peanut hole 51a in the lower fixing plate 57 in which the reinforcing band 51 and the lower reinforcing plate 55 are formed at the outer periphery of the lower concrete pile 50, Removable joint device for steel pipe pile and concrete pile, characterized in that the other side is fastened with a bolt (63) The method of claim 1, 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, and are integrally formed with the vertical support ring 68 connected in series. Removable joint device for steel pipe pile and concrete pile The method of claim 1, The annular ring 70 is at least one portion is cut in the vertical direction, the through-hole 72 is formed in the circumferential direction at a predetermined interval, removable pipe fittings of the steel pipe pile and concrete pile The method of claim 5, Detachment joint of steel pipe pile and concrete pile, characterized in that the through hole 72 is formed in the vertically cut portion of the annular ring 70, and a plurality of radial through holes are formed around the through hole.

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