KR20060027219A - Multifunctional and multipurpose apparatus for reinforcing the head of pile composed of little members and construction method of the enlarged foundation using the apparatus - Google Patents

Abstract

Multifunctional multi-purpose pile head reinforcement device consisting of a small number of member elements according to the present invention, a plurality of reinforcing bars arranged to insert a part of the reinforcing bar from the top of the pile to a predetermined depth to form a single cylindrical structure; A band reinforcing bar spaced apart from the predetermined reinforcing bars to be laminated in multiple layers, and forming a columnar structure together with the reinforcing bars; It is installed on the inner wall of the upper end of the pile, and the reinforcing steel inserted into the upper portion of the pile is fixed while sliding the position of the reinforcing steel inserted into the upper portion of the pile so that it can be accurately arranged at a predetermined distance from the inner wall of the pile A device combining the reinforcing bar fixed with a bolt and a nut and a reinforcing bar which serves as a shear connector by using a bolt and a nut, and using a bolt head as a stud; A device which is installed on the lower inner wall of the upper end of the pile and integrates a steel plate made of a non-slip jaw by tightening with a bolt and a nut, and a sliding jaw and a shear connecting material that serve as a shear connector by using the head of the bolt as a stud; For pouring the stuffed concrete, the disk-shaped lower support plate is installed at a position further below a predetermined depth from the lower end of the reinforcement reinforcement inserted into the pile; One end is connected to the lower end of the bolt member or the reinforcing bar of the device combined with the sliding jaw and shear connector, the other end is configured to include a lower support plate fixing member for supporting and fixing the lower support plate by being connected to the lower support plate.

Description

Multifunctional and multipurpose apparatus for reinforcing the head of pile composed of little members and construction method of the enlarged foundation using the apparatus}             

1 is a view showing an example of a conventional steel pipe pile head reinforcement structure.

Figure 2 is a view showing another example of the conventional steel pipe pile head reinforcement structure.

Figure 3 is a side cross-sectional view showing the structure of a multi-functional, multi-purpose pile head reinforcement device consisting of a small number of member elements according to the present invention.

Figure 4 is a plan view showing the structure of a multi-functional, multi-purpose pile head reinforcement device consisting of a small number of member elements according to the present invention.

Figure 5 shows the structure and installation relationship of the device of the reinforcing reinforcing bar fixed and sliding jaw and shear connector of the multi-function, multi-purpose pile head reinforcement device consisting of a small number of member elements according to the present invention, Magnified view showing partial excerpts.

FIG. 6 is a view showing the structure and installation relationship of a device combining a reinforcing steel rod for a small diameter steel pipe pile, a sliding jaw, and a shear connector in a multifunctional multipurpose pile head reinforcement device composed of a small number of element elements according to the present invention; FIG.

7 is a view schematically showing the principle of tightening the bolt of the device using a reinforcing bar fixed and a sliding jaw and shear connector in the multi-function, multi-purpose pile head reinforcement device composed of a small number of member elements according to the present invention .

8 is a view showing the structure and installation relationship of the lower support plate fixing member in the multi-function multi-purpose pile head reinforcement device consisting of a small number of member elements according to the present invention.

Figure 9 is a view showing a case in which the multi-function multi-purpose pile head reinforcement device consisting of a small number of member elements according to the present invention is applied to the steel pipe pile of small diameter.

10 is a view showing a case in which a multi-functional, multi-purpose pile head reinforcement device composed of a minority member element according to the present invention is applied to a PHC / PSC pile.

FIG. 11 is an enlarged fragmentary view of a portion “A” of FIG. 10.

12 is a view showing a case in which a head reinforcement device having a bent reinforcing bar is applied to a steel pipe pile in the multifunctional multi-purpose pile head reinforcement device composed of a small number of member elements according to the present invention.

Fig. 13 is a view showing a case in which a head reinforcement device having a bent reinforcing bar is applied to a PHC / PSC pile in a multifunctional / multipurpose pile head reinforcement device composed of a few member elements according to the present invention.

<Description of the code for the main part of the drawing>

300 ... Steel Pipe Pile 310 ... Reinforced Steel Bar

320,320 '... steel bars

330 ... Combination of reinforcing steel bars, sliding jaws and shear connectors

335 ... Combined sliding jaw and shear connector

340 ... Non-slip jaw member 350 ... Disk lower base plate

360,360 '... bottom support plate fixing member 370 ... reinforcement spacer support plate

330b, 330s, 600,920b ... Bolt 330a, 330n, 920n ... Nuts

330c, 330r ... clamp 330p ... shear studs

360g ... hook 360h ... L type bend

400 ... jack attached 500 ... wedge

520 Reinforcing bar bend 600 s Female thread

900 ... PHC ・ PSC pile 910 ... PC steel wire

920p ... Clamp Washer

920 ... Combination of reinforcing steel rod and shear connector

The present invention relates to a multi-functional and multi-purpose pile head reinforcement device consisting of a small number of elements and an enlarged foundation construction method using the same. In particular, the structure and structure are simplified, the weight is light and easy to handle and assemble. The present invention relates to a multifunctional and multipurpose pile head reinforcement device and a method of expanding basic construction using the same, which can be accurately positioned at a desired position and can further enhance the functions and roles pursued in the road bridge design standards.

In general, the head reinforcement structure of the steel pipe pile is fixed to the reinforcing bar and the upper disk is provided on the upper portion of the steel pipe, the lower disk and a predetermined distance away from the upper disk provided in contact with the inner circumferential surface of the steel pipe in the steel pipe, the upper disk and the lower It is provided with a plurality of reinforcing members supporting the disc to mutually cure the concrete filled in the space formed by the upper disk and the steel pipe, the lower disk.

1 is a view showing an example of a conventional steel pipe pile head reinforcement structure.

Referring to Figure 1, the conventional steel pipe pile head reinforcement structure (refer to Republic of Korea Utility Model Registration No. 2000-0216366) is a fastening hole 130 is screwed into the reinforcing bar 100 is formed with a screw portion 110 inflated bottom Ring-shaped upper disk 120 formed at regular intervals around the, and the reinforcing member 140 and the reinforcing member 140 to be welded to the bottom surface of the upper disk 120 to avoid the fastening hole 130, A support block 150 welded to a quadrant inner surface of a steel pipe, a + -shaped support rod 160 welded laterally in the steel pipe to reinforce and support the support block 150, and the reinforcing member 140. In contact with the inner circumferential surface of the steel pipe at the lower position of the support block 150 is composed of a disk 170 is welded and fixed.

However, the conventional steel pipe pile head reinforcement structure as described above is provided with a ring-shaped upper disk 120 on the upper portion of the steel pipe pile to fix the reinforcement 100, the support block 150 and the + -shaped support between the inner peripheral surface of the steel pipe Due to the 160, the construction is difficult, the construction is difficult and the working time is long, there are many disadvantages of the burden.

2 is a view showing another example of a conventional steel pipe pile head reinforcement structure.

2, in the case of another example of the conventional steel pipe pile head reinforcement structure (see Republic of Korea Patent Publication No. 2001-0007930) is installed on the upper portion of the steel pipe 200, the upper disc (220) is supported ( 210, wherein the upper disc 210 has a horizontal portion 212 formed with a plurality of holes 220h through which the reinforcing bars 220 are fitted, and at the inner surface position of the steel pipe pile under the horizontal portion 212. It consists of a vertical portion 214 extending vertically downward, between the horizontal portion 212 and the vertical portion 214 to support the horizontal portion 212 to resist deformation of the horizontal portion 212 by the pressing force Many reinforcing ribs 216 are provided. In addition, the upper portion of the steel pipe 200 and the vertical portion 214 of the upper disk 210 so that the upper disk 210 can be bound to the steel pipe 200 by the binding holes 250 such as bolts or pins. A hole is formed.

In addition, the inside of the steel pipe 200 is provided with a lower disk 230 which is spaced apart from the upper disk 210 by a predetermined distance, the lower disk 230 is the upper by a separate support rod 240 It is connected to the disc 210 and fixed.

However, in the conventional steel pipe pile head reinforcement structure as described above, both ends of the support rod 240 supporting the upper disc 210 and the lower disc 230 penetrate the upper disc 210 and the lower disc 230. It is to be fixed by fastening the nut, the reinforcing bar 220 also penetrates the upper disk 210 and the lower disk 230, and fixed to the nuts on both sides of the lower disk 230, and then inserted into the steel pipe is cumbersome work There are disadvantages. The upper disc 210 is composed of a horizontal portion 212, a vertical portion 214, and a reinforcing rib 216, and it is complicated to manufacture such that a plurality of holes 220h must be formed therein.

In addition, when the upper disc 210 is inserted into the steel pipe 200 to fix the upper disc 210, the hole formed in the vertical portion 214 of the upper disc coincides with the corresponding hole formed in the upper end portion of the steel pipe 200. Thereafter, there is a inconvenience in construction in that the fastening holes 250 such as bolts and pins are inserted into the holes and fixed.

The present invention has been created in view of the above matters, and the structure and structure are simplified, the weight is light and easy to handle and assemble, the rebar can be accurately placed in the desired position, pile and stuffing It eliminates slip between concrete and combines with sliding jaws and shear connectors for greater integration, increases moment arm length to increase moment resistance, and reinforces reinforcing bars to make setting of rebar easier. On the other hand, the purpose of the present invention is to provide a multifunctional and multipurpose pile head reinforcing device composed of a small number of member elements that can easily reinforce reinforcing bars inserted into a pile by providing a reinforcing bar spacer supporting plate and an enlarged foundation construction method using the same.

Multifunctional multi-purpose pile head reinforcement device composed of a small number of member elements according to the present invention for achieving the above object, for reinforcing the head of the pile (steel pipe pile, PHC pile, PSC pile, RC pile, etc.) for ground reinforcement As,

A plurality of reinforcing bars arranged in a circular arrangement spaced apart from each other by a predetermined interval so that a part of the reinforcing bars is inserted from the top of the pile to a predetermined depth;

A band reinforcing the plurality of reinforcing bars in the form of circular rings spaced apart from each other by being laminated in multiple layers, and forming a pillar structure together with the reinforcing bars;

It is installed on the inner wall surface of the upper end of the pile, and the reinforcing bar inserted in the upper portion of the pile is fixed to the position of the reinforcing bar inserted in the upper portion of the pile so that it can be installed exactly spaced apart from the inner wall surface of the pile A device that combines a steel plate made of a non-slip jaw by tightening with a bolt and a nut, and uses a bolt head as a stud, and uses a reinforcing bar fixing and a sliding jaw and a shear connector as a shear connector;

A device which is installed on the lower inner wall of the upper end of the pile and integrates the steel sheet manufactured by the non-slip jaw by tightening the bolt and the nut, and serves as the shear connector by using the head of the bolt as a stud;

A disk-shaped lower support plate for horizontally placing the filling concrete on the top of the pile and installed horizontally at a lower depth from a lower end of the reinforcing bar inserted into the top of the pile;

One end is connected to the lower end of the bolt member or reinforcing reinforcing bar of the device that combines the sliding jaw and the shear connector, and the other end is connected to the lower support plate to include a lower support plate fixing member for supporting and fixing the lower support plate It has its features.

In addition, in order to achieve the above object, the expansion-based construction method using the multi-functional, multi-purpose pile head reinforcement device composed of a small number of member elements according to the present invention,

a) arranging a plurality of reinforcing bars in a circular column shape spaced apart from each other at predetermined intervals, and manufacturing a circular reinforced column structure by stacking and fixing a plurality of strip reinforcing bars in a multi-layer spaced apart from each other at predetermined intervals;

b) temporarily fixing the lower support plate fixing member by using the upper hook of the lower support plate fixing member in a state where the assembly of the disc-shaped lower support plate and the lower support plate fixing member is inserted into the pile;

c) After fastening the device using the sliding jaw and the shear connector to the inner wall of the pile, the lower support plate by mounting the lower support plate fixing member that was temporarily fixed to the bolt of the device using the sliding jaw and the shear connector Fixing the fixing member normally;

d) fastening the device combining both the reinforcing steel bars and the sliding jaw and the shear connector to the upper inner wall surface of the pile, and inserting the factory-produced circular reinforced pillar structure into the pile;

e) tightening the reinforcing bars by tightening bolts and nuts of a device that combines the reinforcing bar fixing and the sliding jaw and the shear connector;

f) reinforcing the basal reinforcing bar between the upper circular reinforcing column structures of the pile while field-assembling the band reinforcing bars around the reinforcing bars of the pile upper surface; And

g) it is characterized in that it comprises the step of pouring and curing the stuffed concrete inside the cylindrical space consisting of the inner wall surface and the lower support plate of the pile.

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

Figure 3 is a cross-sectional view showing the structure of a multi-functional, multi-purpose pile head reinforcement device composed of a small number of member elements according to the present invention.

Referring to Figure 3, which shows the structure and installation relationship of the head reinforcement device for the steel pipe pile in the head reinforcement device of the pile according to the present invention, the head reinforcement device of the steel pipe pile reinforcing reinforcement (310), band reinforcement ( 320), the reinforcing bar fixed and the sliding jaw and shear connecting device 330, the sliding jaw and the shear connecting device 335, non-slip jaw member 340, disk-shaped lower backing plate 350, lower backing plate It is configured to include a fixing member 360, the reinforcement spacer supporting plate 370.

The reinforcement steel 310 is installed in a plurality of spaced apart from each other by a predetermined interval so that a part of the body is inserted into the upper part of the steel pipe pile 300 up to -10cm from the diameter of the steel pipe (road bridge design standards) to form a reinforced concrete column structure Achieve.

The strip reinforcing bar 320 is a circular ring shape that is circumscribed to the plurality of reinforcing bar 310 is installed in a plurality of layers spaced apart from each other at predetermined intervals, and forms a column structure with the reinforcing bar 310.

The device 330 that combines the reinforcing reinforcing bar and the sliding jaw and shear thermal binder is installed on the upper inner wall surface of the upper end of the steel pipe pile 300, the reinforcing bar 310 is inserted into the upper portion of the steel pipe pile 300 The steel pipe pile 300 is fixed to the position of the reinforcing bar 330 is inserted into the upper portion of the steel pipe pile 300 to serve as a shear connector while being spaced apart a predetermined distance from the inner wall surface. In addition, by tightening the steel plate made of the non-slip jaw member 340 with bolts and nuts to integrate with the steel pipe, using the bolt head as a stud to serve as a shear connector.

The device 335 that combines the sliding jaw and the shear connector is installed on the lower inner wall of the upper end of the steel pipe pile 300, and is integrated with the steel pipe pile by tightening the steel plate made of the non-slip jaw member 340 with bolts and nuts. The head of the bolt was used as a stud to serve as a shear connector.

The device 330 which combines the reinforcing bar fixing and the sliding jaw and the shear connecting material and the apparatus 335 which uses the sliding jaw and the shear connecting material are upper and lower layers on the inner wall surface of the upper end of the steel pipe pile 300 as shown. It is installed in four places at 90 ° intervals in a zigzag form. Of course, depending on the steel pipe pile diameter, the devices may vary in number, arrangement and arrangement.

In addition, as shown in FIG. 5, the device 335 that combines such a sliding jaw and a shear connecting member forms holes at both ends of the non-slip jaw member 340 in which a circular flat iron piece member is formed in one pair. After forming a hole in the steel pipe pile 300 at the hole position and inserting the bolt 330s between the holes, the non-slip jaw member 340 is fixed by fastening the nut 330n between the inner wall and the outer wall, and the bolt By using the bolt head as a shear connection stud (330p) at the inner end of the (330s) is to serve as a shear connector.

In addition, the device 330 that combines the reinforcing bar reinforcement and the sliding jaw and shear connector, as shown in Figure 5, a channel-type clamp for fixing the position in the reinforcing bar 310 having a symmetry of the plurality of rebars The bolt 330b and the reinforcing bar 310 are coupled to each other at 330c, and the non-slip jaw member 340 is fixed as the device 335 which combines the sliding jaw and the shear connector as shown in FIG. 4. The nut 330a is welded to a position corresponding to the position of the bolt 330b of the non-slip jaw member 340, and then the bolt 330b connected to the reinforcing bar 310 is rotated to be fastened to the nut 330a, thereby securing the pile and the predetermined portion. It is a device to be integrated at a distance.

On the other hand, the device 330 combined with the reinforcing bar fixed and the sliding jaw and the shear connector as described above, as shown in Figure 6, fastening the device 335 of the sliding jaw and the shear connector, and to the reinforcing bar 310 Constrained by the female screw 600s and the annular clamp 330r, and then inserting and fastening the bolt 600 into the female screw 600s, the positional separation of the pile and the reinforcing bar 310 and the fixing of the reinforcing bar and the sliding jaw and the shear connector It may also be configured to serve as.

The device 330 that combines the above-described reinforcing bar fixing and the sliding jaw and the shear connecting member welds the bolt to the anti-skid jaw member 340 as shown in FIG. 7, and attaches the channel clamp 330c to the end of the bolt to reinforce it. When it is fixed to the reinforcement 310, between the device and the symmetrical device to match the rod 400 with the jack is pushed to the jack so that the non-slip jaw member 340 is in close contact with the inner surface of the steel pipe pile 300, It is a device that is fastened to both ends of the non-slip jaw member 340 by a bolt and a nut to be integrated with the steel pipe pile 300 and a predetermined position separation. The device (330, 335, 340) using a non-slip jaw member and a shear connecting member installed on the upper and lower ends of the steel pipe pile 300 is installed on the inner wall surface of the upper end of the steel pipe pile 300, the non-slip jaw member (340) Prevents the activity of the concrete to be filled for the reinforcement of the steel pipe pile 300, while providing the installation location of the device 330 combined with the reinforcing bar fixed and sliding jaw and shear connector. The non-slip jaw member 340 is made of a circular iron piece member of a predetermined size.

The disc-shaped lower support plate 350 is for placing the stuffed concrete on the upper portion of the steel pipe pile 300, and has a predetermined depth from a lower end portion of the reinforcing steel 310 inserted into the upper portion of the steel pipe pile 300. For example, 100 mm) is installed horizontally at a lower position (so that the distance from the upper end of the steel pipe pile to the lower support plate is equal to the diameter of the steel pipe pile). The disk-shaped lower support plate 350 is formed in a plurality of holes for the insertion of the lower support plate fixing member 360 to be described later.

The lower support plate fixing member 360 is connected to one end of the non-slip jaw member fastening bolt member 330s or the reinforcing bar, and the other end thereof is connected to the lower support plate 350 to support the lower support plate 350. And fix. As shown in Figure 8, the lower support plate fixing member 360, the end of the body is formed with a hook (360g) of the "∩" type for engaging connection to the reinforcing bar fixing bolt member (330s) At the other end of the body, an L-shaped bent portion 360h is formed for the connection of the support to the disc-shaped lower support plate 350, and the bottom of the reinforcement steel 310 is positioned when the reinforcement pillar structure is inserted into the pile. Reinforcing bar spacer base plate 370 for facilitating setting of the reinforcing bar 310 is provided at the corresponding portion of the reinforcing bar column structure by placing the lower end of the reinforcing bar column structure.

9 shows the structure and installation relationship of the lower support plate fixing member 360 'employed when the diameter of the pile is small diameter in relation to the lower support plate fixing member 360 as described above, the lower support plate fixing member 360' Is connected in such a way as to support the lower support plate 350 by the L-shaped bent portion (360h) of), but the upper end of the lower support plate fixing member 360 'is fixed by welding to the lower end of the reinforcing bar 310 The point is slightly different from the structure of the lower support plate fixing member 360 and the binding method in the case of FIG. 8 (in the case of the large diameter steel pipe pile).

On the other hand, Figure 10 is a view showing a case in which the multi-function multi-purpose pile head reinforcement device composed of a minor member element of the present invention is applied to a PHC or PSC pile.

As shown in FIG. 10, in this case, as in the case of the small diameter steel pipe pile of FIG. 9, the lower support plate 350 is formed by the L-shaped bent portion 360h of the lower support plate fixing member 360 ′. To support the upper end of the lower support plate fixing member 360 'is fixed by welding to the lower end of the reinforcing bar 310.

In particular, the PC steel wire 910 of the prestressed high-strength concrete (PHC) or prestressed concrete (PSC) pile (900) is reinforced with the original reinforcing bar 310 by a separate strip reinforcement (320 ') Secure the connection.

In addition, in the mechanism for fixing the reinforcing bar 310 to the pile 900, as shown in Figure 11, the through hole (900h) for inserting the bolt is formed in the pile 900, the through hole (900h) Insert the bolt 920b into the end of the bolt to cross the band reinforcement 320 to be a locking jaw, and then clamp and fix the clamp washer 920p and the nut 920n to the end of the bolt 920b. Rebar 310 is fixed to the pile (900).

On the other hand, Figure 12 and Figure 13 is a pile head reinforcement device is made by bending the reinforcing reinforcing bar up and down around the top of the pile to the top of the pile. 12 is a view of the steel pipe pile, Figure 13 relates to the PHC and PSC piles.

Referring to Figure 12 which is the head reinforcement device for the steel pipe pile, the reinforcing bar 310 is bent inclined at a predetermined position 520, the upper side of the pile is a reinforcement column, such as the pile diameter, the lower side of the pile Is composed of a reinforcement pillar body smaller than the pile diameter, the lower support plate fixing member 360 is provided with a reinforcing bar spacer support plate 370, when inserting the assembled reinforcing bar column structure, the bottom of the reinforcement reinforcement spacer base plate (370) In order to ensure a predetermined distance from the lower support plate 350 by being positioned at). In addition, the portion of the bent portion 520 of the reinforcement pillar body in contact with the pile top surface is temporarily fixed with a wedge 500 to maintain the fixed position and spacing of the reinforcing bar 310. The anti-slip jaw and the shear connector combined device 335 or the lower support plate fixing member 360 installed on the upper and lower ends of the double pile are as shown in FIGS. 4 and 8.

Here, placing the inclined bent portion 520 in the reinforcing bar 310 as described above to increase the arm length between the bars while supporting the reinforcement by placing the bent portion 520 at the top of the pile to improve the resistance moment capacity To make it possible.

Referring to FIG. 13 showing the head reinforcement device for the PHC pile and the PSC pile, the reinforcing bar 310 is bent inclined 520 at a predetermined position, and the upper side of the pile is formed in the same position as the PS steel bar. Reinforcing column, the lower side of the pile is composed of a circular reinforcing column smaller than the pile diameter, the bottom of the reinforcing bar 310, the lower support plate fixing member 360 'for fixing the lower support plate 350 symmetrically, This integral column is inserted into the pile inner surface, and the wedge 500 is fixed to the place where the pile upper surface and the bent portion 520 of the reinforcing bar is fixed, thereby positioning the assembled reinforcing column structure and the lower cover plate. It consists of setting.

Next, a method of constructing an enlarged foundation using a multifunctional multipurpose pile head reinforcement device composed of a few member elements according to the present invention having the above configuration will be briefly described with reference to FIGS. 3 to 8. This construction method will be explained on the basis of the case of construction on large diameter steel pipe piles for convenience.

First, a plurality of reinforcing bars 310 are arranged in a circular column shape spaced apart from each other by a predetermined interval, around the plurality of strip reinforcing bars 320 are spaced apart from each other by a fixed stack (multilayer or welding, etc.) ) To manufacture a single columnar structure.

When the production of the column structure is completed in this way, the lower support plate fixing member 360 in a state where the assembly of the disc-shaped lower support plate 350 and the lower support plate fixing member 360 is inserted into the ground reinforcing steel pipe pile 300. Using the upper hook (360g) of the lower base plate fixing member 360 is temporarily fixed. For example, by placing the hooks 360 over the top of the steel pipe pile 300, or roughly connecting the hooks 360 using a string or the like and then fixing the straps to the surrounding equipment, the lower support plate fixing member 360 ) Is temporarily fixed.

When the temporary fixing of the lower support plate fixing member 360 is completed, the device 335 which combines the sliding jaw and the shear connector for fixing the lower support plate fixing member 360 to the inner wall surface of the steel pipe pile 300 is completed. Tighten. Thereafter, the upper hook 360g of the lower support plate fixing member 360, which was temporarily fixed, is mounted on the bolt 330s of the device 335 that combines the upper sliding jaw and the shear connector to lower the lower support plate fixing member ( 360) is fixed normally.

In this manner, when the fixing of the lower support plate fixing member 360 is completed, the device 330 which combines the reinforcing bar fixing and the sliding jaw and the shear connecting member is fastened to the upper inner wall surface portion of the steel pipe pile 300. Then, the factory-produced circular reinforcement column structure is inserted into the steel pipe pile 300, the reinforcement spacer spacer is provided with a lower end of the reinforcing steel 310 of the reinforcement column structure provided in a predetermined portion of the lower support plate fixing member 360 Place it on the support plate 370.

Thereafter, the reinforcing bar 310 is firmly fixed by tightening the bolt 330b and the nut of the device 330 which combines the rebar fixing and the sliding jaw and the shear connector. Regarding the fixing of the reinforcing bar 310 has already been described above with reference to FIG. 7, the detailed description thereof will be omitted.

When the insertion of the circular reinforcement column structure into the steel pipe pile 300 and the fixing of the reinforcing steel 310 is completed by the above, while expanding the base steel reinforcement between the upper circular reinforcement column structure of the steel pipe pile 300 and the steel pipe pile The band reinforcing bar 320 is assembled around the reinforcing bar 310 of the upper surface. Thereafter, the inner wall surface of the steel pipe pile 300 and the inside of the cylindrical space consisting of the lower support plate 350 is placed and cured concrete to complete the construction of the atmospheric grass.

The above describes the expansion base construction method using the case of the large diameter steel pipe pile as an example, and is similar to the expansion base construction method in the large diameter steel pipe pile even in the case of the small diameter steel pipe pile or the concrete pile such as PHC or PSC. It will be appreciated by those skilled in the art that the present invention can be sufficiently applied on the basis thereof, and thus the expanded basic construction method thereof will not be described separately.

In order to smoothly transfer the loads transferred from the superstructure to the pile, the road bridge design standards were to implement the filled concrete reinforced with reinforcement to be integrated with the expanded foundation structure at a part of the pile, and the steel pipe and the filled concrete in the steel pipe pile Non-slip jaws are welded to prevent slippage between them. Therefore, when constructing by the provisions of this specification, there are problems of workability and quality due to welding in the steel pipe inside, and formwork installation due to the filling of concrete filled to a certain depth. Tofu reinforcement device is being developed. These existing technologies have a heavy weight due to the use of a circular cover plate or a hollow park cover plate on the top of the pile, making it difficult to increase and handle construction costs, and there is a problem of separating the filled concrete from the expanded base concrete, and the filled concrete and the steel pipe. Slip phenomenon between piles is not eliminated. In addition, the existing technology is a method of penetrating the reinforcing bar in the steel pipe outer diameter bent to 90 ° to buy the reinforcing bar inside the steel pipe, the structure is because the bent portion is configured without a curved radius.                     

Therefore, the multi-functional and multi-purpose pile head reinforcement device composed of a small number of member elements of the present invention, as described above, in order to smoothly transfer the upper load to the pile, the place of filling concrete placement and reinforcing bar according to the provisions of the road bridge design standard specification The structure of the device is simplified to ensure the smoothness of the device, and the non-slip jaw device is installed so that no slip occurs between the steel pipe pile and the filled concrete, and the transmission connection member is installed to make the integration more secure between the steel pipe pile and the filled concrete. To improve safety. Such a device of the present invention is made of a reinforcing bar and a small number of constituent members, so the weight is light and easy to handle, it is possible to reduce the construction cost as well as shorten the air. In addition, the device of the present invention has a function and role to be pursued in the road bridge design standards, and the bending moment resistance ability of the reinforced concrete function by increasing the arm length of the reinforcing bar and the installation of the shear connector to obtain a more enhanced effect It is effective to improve about 10-15% or more than the specification. In addition, there is an economical advantage in terms of cost savings in the use of materials.

In addition, the construction method of the present invention can be applied to not only steel pipe piles but also PHC piles, PSC piles, RC piles, etc. can be applied to any type of pile without any special restrictions in the actual site construction excellent field applicability There is an advantage. In addition, in the construction method of the present invention in the factory only the inner surface of the pile of the reinforcing reinforcing bar to be bonded to the reinforcing bar, the reinforcing bar of the upper pile is to be assembled on-site, the positional movement of the reinforcement reinforcement can be somewhat moved as the reinforcement of the expansion base cast iron When it overlaps with reinforcing bars at the time, the adjustment is easy and the reinforcement is easy.

Claims (8)

To reinforce the head of pile (steel pipe pile, PHC pile, PSC pile, RC pile, etc.) for ground reinforcement, A plurality of reinforcing bars arranged in a circular arrangement spaced apart from each other by a predetermined interval so that a part of the reinforcing bars is inserted from the top of the pile to a predetermined depth; A band reinforcing the plurality of reinforcing bars in the form of circular rings spaced apart from each other by being laminated in multiple layers, and forming a pillar structure together with the reinforcing bars; It is installed on the inner wall surface of the upper end of the pile, and the reinforcing bar inserted in the upper portion of the pile is fixed to the position of the reinforcing bar inserted in the upper portion of the pile so that it can be installed exactly spaced apart from the inner wall surface of the pile A device that combines a steel plate made of a non-slip jaw with a bolt and a nut to integrate and reinforces a reinforcing bar that also serves as a shear connector by using a bolt head as a stud and a sliding jaw and a shear connector; A device which is installed on the lower inner wall of the upper end of the pile and integrates the steel sheet manufactured by the non-slip jaw by tightening the bolt and the nut, and serves as the shear connector by using the head of the bolt as a stud; A disk-shaped lower support plate for horizontally placing the filling concrete on the top of the pile and installed horizontally at a lower depth from a lower end of the reinforcing bar inserted into the top of the pile; One end is connected to the lower end of the bolt member or reinforcing reinforcing bar of the device using the sliding jaw and the shear connector, and the other end is connected to the lower support plate, characterized in that it comprises a lower support plate fixing member for supporting and fixing the lower support plate Multifunctional and versatile pile head reinforcement consisting of a few member elements. The method of claim 1, The device 335 that combines the sliding jaw and the shear connector constitutes holes at both ends of the non-slip jaw member 340 in which the circular flat iron piece member constitutes a set, and the hole is also formed in the steel pipe pile 300 at the hole position. After forming and inserting the bolts 330s between the holes, the non-slip jaw member 340 is fixed by fastening the nuts 330n to the inner wall and the outer wall, and shearing the bolt head at the inner end of the bolt 330s. A multifunctional and versatile pile head reinforcement device composed of a few member elements, characterized in that it also serves as a shear connector by using as a connection stud (330p). The method of claim 1, The device 330 which combines the rebar fixing and the sliding jaw and the shear connector is a channel type clamp 330c for fixing the position to the reinforcing bar 310 having symmetry among the plurality of rebars and reinforced with the bolt 330b. Where the reinforcing bar 310 is coupled, and the non-slip jaw member 340 is fixed, such as the device 335 that combines the sliding jaw and the shear connector, and the position corresponding to the position of the bolt 330b of the non-slip jaw member 340. After welding the nut 330a, the bolt 330b connected to the reinforcing bar 310 is rotated and fastened to the nut 330a to be integrally spaced apart from the pile by a predetermined distance. Multifunctional and versatile pile head reinforcement device. The method of claim 1, The device 330 which combines the reinforcing bar fixing and the sliding jaw and the shear connecting material is fastened to the device 335 which combines the sliding jaw and the shear connecting material, and the female screw 600s and the annular clamp to the reinforcing bar 310 ( 330r), and then the bolt 600 is inserted into and fastened to the female screw 600s, so that the position of the pile and the reinforcing bar 310 and the reinforcing bar fixed and the sliding jaw and the shear connector, characterized in that configured to combine Multifunctional and versatile pile head reinforcement device composed of member elements. The method of claim 1, The lower support plate fixing member is formed at one end of the body with a hook of the "∩" type for engaging connection to the bolt member of the sliding jaw and shear connector device, the other end of the body is supported by the disk-shaped lower support plate An L-shaped bent portion is formed for the type connection, and when the reinforcement column structure is inserted into the pile, the corresponding portion where the bottom of the reinforcing bar is located is placed on the lower part of the reinforcing bar of the reinforcement column structure. A multifunctional and versatile pile head reinforcement device composed of a few member elements, characterized in that a reinforcing bar spacer support plate is provided for facilitating setting. The method of claim 1, The lower support plate fixing member is a multi-function consisting of a minority member element characterized in that the one end is welded to the lower end of the reinforcement reinforcement, the other end is fixed to the lower support plate in order to set the lower position of the reinforcement and the fixing of the lower support plate ㆍ Purpose pile head reinforcement device. The method of claim 1, The reinforcing reinforcement is formed in one piece, the inclined bent portion is formed between the portion located on the upper surface of the top of the pile and the portion of the lower surface (insertion of the inside of the pile) of the pile top The reinforcing bar portion located in the upper surface portion of the inclined bent portion is positioned to the same diameter as the pile diameter, and the reinforcing steel portion located in the lower surface portion of the inclined bent portion is spaced a predetermined distance from the inner wall of the steel pipe. A multifunctional and versatile pile head reinforcement device composed of a small number of member elements, wherein the pile head is inserted and fixed within a pile to a predetermined depth. A method for constructing an enlarged foundation using a multifunctional and versatile pile head reinforcement device composed of a few member elements, a) arranging a plurality of reinforcing bars in a circular column shape spaced apart from each other at predetermined intervals, and manufacturing a circular reinforced column structure by stacking and fixing a plurality of strip reinforcing bars in a multi-layer spaced apart from each other at predetermined intervals; b) temporarily fixing the lower support plate fixing member by using the upper hook of the lower support plate fixing member in a state where the assembly of the disc-shaped lower support plate and the lower support plate fixing member is inserted into the pile; c) After fastening the device using the sliding jaw and the shear connector to the inner wall of the pile, the lower support plate by mounting the lower support plate fixing member that was temporarily fixed to the bolt of the device using the sliding jaw and the shear connector Fixing the fixing member normally; d) fastening the device combining both the reinforcing steel bars and the sliding jaw and the shear connector to the upper inner wall surface of the pile, and inserting the factory-produced circular reinforced pillar structure into the pile; e) tightening the reinforcing bars by tightening bolts and nuts of a device that combines the reinforcing bar fixing and the sliding jaw and the shear connector; f) reinforcing the basal reinforcing bar between the upper circular reinforcing column structures of the pile while field-assembling the band reinforcing bars around the reinforcing bars of the pile upper surface; And g) an expansion-based construction method using a multi-functional and multi-purpose pile head reinforcement device composed of a few member elements, comprising the step of placing and curing the stuffed concrete inside the cylindrical space consisting of the inner wall surface and the lower support plate of the pile; .

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