KR20060020439A - Concrete pile member with an extended head - Google Patents

Abstract

The present invention is a multi-stage assembly type that is improved to be able to vary the length by assembling in multiple stages to respond to the change of the foundation depth while ensuring the stability, construction and economical efficiency, assembling properties of pile strength when supporting pile loads The head extended concrete pile member,

In the head-extended concrete pile member having a head extension,

A base pile formed by forming a head extension part at the bottom and mounting a metal pile cap on the upper end of the pillar portion having a smaller diameter, and drilling a bolt hole at a predetermined depth toward the center over the outer circumference of the pile cap;

And an assembly end file formed by forming a laminated assembly groove on the bottom of the head extension part to be assembled on the pile cap of the base pile, and forming a reinforcement cover band part formed and attached to cover the outer circumference and the laminated assembly groove. There is an excellent effect of providing a multi-stage assembled head extension concrete pile member.

Concrete pile, bolt hole, assembly pile pile, pile cap,

Description

Concrete Pile Member with an Extended Head}

1 is a conceptual view of the file strength showing the relationship between the internal strength of the general file and the construction history of the constructed file.

Figure 2 is a side cross-sectional view showing a multi-stage assembled head extension concrete pile member with the present invention.

Figure 3 is a view showing another embodiment of the multi-stage assembled head extension concrete pile member according to the present invention.

Figure 4 is a view showing another embodiment of the multi-stage assembled head extension concrete pile member in the present invention.

Explanation of symbols on the main parts of the drawings

10: head extension concrete pile member 12: base pile

14: assembly file 16: first head extension

18: pillar 20: pile cap

21: second head extension portion 22: the first bolt ball

24: Laminated Assembly Groove 26: Reinforcement Cover Band

28: 2nd bolt ball 30: fastening bolt

32: upper head extension 34: upper assembly groove

36: base block

The present invention relates to a multi-stage assembled head-extended concrete pile member, and more particularly, to multiply corresponding to depth change while securing stability, constructability and economic efficiency, and assembly resistance to pile strength during pile construction to support a load of a structure. The present invention relates to a multi-stage assembly type head extension concrete pile member that is improved to be assembled in a variable length.

In general, in the case of erecting a building or structure, the foundation work is reinforced to support the structure of the upper part according to the condition of the ground or the load of the structure.

As a result, a shallow foundation or a deep foundation is performed according to various conditions such as the load of the structure. A shallow foundation is defined as a case where the root entry ratio is 1 or less, and a deep foundation is defined as a case where the root entrance ratio is 1 or more.

In the case of the shallow foundation, the structure is directly supported on the ground without using a pile, and when the ground under the structure cannot support the load of the upper structure, the pile is used to reinforce the bearing capacity of the ground.

As described above, the pile foundation according to the ground work is a foundation method in which the pile is installed to connect the head to the structure. If the pile is classified according to the material, it can be classified into steel pile, concrete pile, composite pile, and the like. If it is classified, it can be divided into type method, embedding method, and field casting method.

And the type construction method is to force the pile into the ground by striking the pile from the top of the pile after the pile is built up. It is good and easy to install.

However, the type method is difficult to vertically approach when the pile is to be installed deeply, excessive vibration and noise are generated, and construction in the city is limited.

On the other hand, the embedding method solves various problems of the type construction method by forming a hole in the ground in advance, injecting an adhesive about half of the hole, and then inserting and fixing the file into the hole. As a result, the embedding method is mainly used for the pile foundation in the city center now.

In other words, the proportion of foundation works in building construction is very large, and in the case of pile construction, various pile construction methods are used due to different ground conditions and conditions for each site, lack of accurate understanding of driving equipment, and construction based on construction experience. It is used and feels difficulty every time.

1 is a conceptual diagram of the file strength showing the relationship between the internal strength of the pile and the construction history of the constructed pile. As shown in FIG. 1, the pile 2 is supported by a load capacity of a plurality of piles 2 mounted in the lower portion of the structure 4.

The construction strength of the piled pile 2 is the sum of the tip bearing force TP of the pile tip and the peripheral frictional force SF of the pile side.

By the way, in most cases, the strength of the pile itself is high, but the construction strength of the pile is low due to workability.

For example, in the case of a high strength concrete pile (PHC, hereinafter referred to as PHC) of φ400, the pile itself has a internal strength of 112 tf, but the construction strength is about 60 to 80 tf, resulting in a waste of 32 to 52 tf of pile strength.

In particular, in the case of the embedding method, after the ground is drilled larger than the diameter of the pile, the fabricated pile is installed in the perforation and the cement is injected between the pile and the ground to increase the peripheral frictional force. Subsequent tests showed that the peripheral friction was very minimal and most construction strength was dependent on the tip bearing capacity.

Therefore, in the embedding method, it is necessary to make the construction history close to the pile itself, thereby improving the use efficiency of the pile.

In order to solve the problems of the prior art made as described above, an object of the present invention is to change the depth of the foundation while ensuring the stability, construction and economical efficiency, assemblability of pile strength during pile construction to support the load of the structure In order to provide a multi-stage assembly type head extension concrete pile member improved by being assembled in multiple stages to vary the length.

The present invention for realizing this

In the head expanded concrete pile member formed by forming a head extension,

A base pile formed by forming a head extension portion at the bottom and mounting a metal pile cap on the upper end of the pillar portion having a smaller diameter, and forming a first bolt hole at a predetermined depth toward the center over the outer circumference of the pile cap. and,

Laminated assembly grooves are formed on the bottom of the head extension part so as to be assembled on the pile cap of the base pile, and a second bolt hole is formed through the reinforcement cover band part formed and attached to cover the outer circumference and the laminated assembly groove. To provide a multi-stage assembly type head extension concrete pile member is fastened with a bolt, characterized in that it comprises an assembly end pile made to weld the pile cap and the reinforcement cover band.

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

Figure 2 is a side cross-sectional view showing a multi-stage assembled head extension concrete pile member according to the present invention.

The multi-stage assembled type head extension concrete pile member 10 includes a base pile 12 and an assembled end pile 14 in the head extension concrete pile member.

The base pile 12 includes a metal pile cap 20 formed on the upper end of the pillar portion 18 having the first head extension portion 16 formed at a lower end thereof and having a smaller diameter. The first bolt hole 22 is formed to a certain depth toward the center over the outer circumferential surface of 20).

The base pile 12 is a pile that is first inserted into the pile hole (not shown) receives the ground force, the shape of the pile cap 20 can be formed in various shapes without being limited to any one shape, such as square, hexagon, etc. have.

The first bolt hole 22 may be changed in a predetermined number depending on the design durability of the base pile 12, but is not limited thereto.

The assembly end pile 14 forms a laminated assembly groove 24 on the bottom of the second head extension portion 21 to be assembled on the pile cap 20 of the base pile 12, and has a circumferential peripheral surface and the laminated assembly groove. Fastened to the fastening bolt 30 through the second bolt hole 28 penetrated through the reinforcing cover band portion 26 formed and attached to the cover 24, the pile cap 20 and the reinforcing cover band portion 26 Is made to be welded.

The laminated assembly groove 24 is formed to a predetermined depth in the second head extension portion 21, the shape is not specified can be formed in a variety of shapes, such as square, hexagon.

In addition, the reinforcement cover band part 26 is manufactured through a press or other manufacturing method to form the entire bottom surface of the second head extension part 21 of the assembly end pile 14.

In addition, the second bolt hole 28 is formed to penetrate through the reinforcement cover band portion 26 to the laminated assembly groove 24, so that the fastening bolt 30 is easily formed, and according to the design, there are various numbers. Can be formed.

In addition to the fastening by the fastening bolt 30 described above, the assembly can be made firm by welding between the pile cap 20 of the base pile 12 and the reinforcement cover band portion 26 of the assembly end pile 14.

3 is a view showing another embodiment of the multi-stage assembled head extension file according to the present invention, wherein the upper head extension part 32 is formed on the other side of the first head extension part 16 of the base pile 12, The upper assembly groove 34 is formed in the.

The upper head extension part 32 is formed in the base pile 12, and the second extension head part 21 is assembled using the assembly short pile 14 of the form in which the second extension head part 21 is removed.

In addition, the upper assembly groove 34 is made by applying an adhesive of epoxy in order to firmly maintain the assembly stack with the assembly end pile 14.

Figure 4 is a view showing another embodiment of the multi-stage assembled type head extension concrete pile member according to the present invention, the upper assembly groove 34 is formed in the base block 36, and the second head extension portion ( The multi-stage assembly pile is formed by stacking the columnar assembled pile pile 14 of the form in which 21) is omitted and attaching it with an adhesive.

Here, when explaining the operation of the present invention made as described above, when the multi-stage assembly type head extension concrete pile member 10 is composed of a base pile 12 and the assembly end pile 14 to form a deep foundation depth In response to this, the multi-stage assembled head extension concrete pile member 10 may be assembled and used in multiple stages.

That is, the operator first prepares the base pile 12 and the assembly end pile 14 of the multi-stage assembly type head extension concrete pile member 10 according to the designed pile hole depth in two or three stages. Manufacture and assemble in the field.

The base pile 12 is erected, the pile assembly groove 24 of the second head extension portion 21 of the assembly end pile 14 is aligned on the pile cap 20, and then the fastening bolt 30 The assembly is completed by fastening through the second bolt ball 28 and the first bolt ball 22 using.

As described above, when the multi-stage assembled head extension concrete pile member 10 is assembled in the field, the pile strength is increased by inserting the pile hole into a pile hole having a predetermined depth, thereby increasing the strength of the multi-stage assembled head extended concrete pile member 10. Is done.

And the assembly action of the multi-stage assembly type head extension concrete pile member 10 shown in Figures 3 and 4 is different from the shape of the base block body 36, the construction process is the same as shown in Figure 2 and a detailed description thereof will be omitted.

Within the technical scope of the fastening and assembly means that can be applied to all steel pipes, concrete pipes, synthetic resin pipes, wood pipes using the multi-stage assembly type head extension concrete pile member of the present invention is within the scope of the present invention, Therefore, the infringement of the rights of the present invention.

According to the present invention, the multi-stage assembly of the reinforcement socket member which can reduce the number of piles used in construction by raising the construction strength of the pile to the pile itself without affecting the weight or volume of the pile used in the embedding method. By assembling the head extension concrete pile member on-site quickly, the usability, transportability, loadability, efficiency and economic efficiency of the pile can be greatly improved.

In addition, the construction of the base pile alone or assembling the assembly pile directly on the site according to the depth of the pile hole has the effect of securing the work space in the narrow site and the utilization of the double pile file significantly.

In addition, the design strength is determined to be the smaller of the pile strength determined by the ground or workability compared to the pile strength constructed by the pile company, resulting in a loss of 30-40% of the pile strength (LOSS). When multi-stage assembly type head extension concrete pile member is used, it is an effective method that can exhibit 100% of the strength of the current construction method, and the design is used as the pile strength.

Accordingly, the head extension part is designed and applied to increase the pile strength, thereby reducing the number of piles, leading to cost reduction and shortening of air, while completing the design with a small load. In the case of deep depth, the base pile and assembly stage piles can be assembled in multiple stages to achieve the expected increase in strength.

In addition, multi-stage assembly type head extension concrete pile member is provided with base pile and assembly pile pile, which reduces the pile cap and reduces the amount of concrete cement and reinforcement by about 10% ~ 20%. As the number of files is reduced, the air can be significantly reduced, and the labor, labor, current and financial costs can be significantly reduced, which is a very useful invention for the civil and construction industries.

Claims (3)

In the head-extension pile, A base pile formed by forming a head extension portion at the bottom and mounting a metal pile cap on the upper end of the pillar portion having a smaller diameter, and forming a first bolt hole at a predetermined depth toward the center over the outer circumference of the pile cap. and, Laminated assembly grooves are formed on the bottom of the head extension part so as to be assembled on the pile cap of the base pile, and a second bolt hole is formed through the reinforcement cover band part formed and attached to cover the outer circumference and the laminated assembly groove. Multi-stage assembly type head extension concrete pile member is fastened with a bolt, characterized in that it comprises an assembly end pile made to weld the pile cap and the reinforcement cover band. The multi-stage assembly type head extension concrete pile member according to claim 1, wherein the base pile can be formed in various shapes without being limited to any one of square, hexagon, and the like. The multi-stage assembling head according to claim 1, wherein the laminated assembly groove is formed at a predetermined depth in the head extension part, and the shape is not limited to any one of a square, a hexagon, and the like. Expanded concrete pile member.

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