KR100662053B1 - Reinforcing Socket Member of Pile with an Extended Head - Google Patents

Reinforcing Socket Member of Pile with an Extended Head Download PDF

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Publication number
KR100662053B1
KR100662053B1 KR1020040049797A KR20040049797A KR100662053B1 KR 100662053 B1 KR100662053 B1 KR 100662053B1 KR 1020040049797 A KR1020040049797 A KR 1020040049797A KR 20040049797 A KR20040049797 A KR 20040049797A KR 100662053 B1 KR100662053 B1 KR 100662053B1
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KR
South Korea
Prior art keywords
pile
screw
socket
strength
construction
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Application number
KR1020040049797A
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Korean (ko)
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KR20060000825A (en
Inventor
윤 용 송
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송기용
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Priority to KR1020040049797A priority Critical patent/KR100662053B1/en
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Publication of KR100662053B1 publication Critical patent/KR100662053B1/en

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/48Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/54Piles with prefabricated supports or anchoring parts; Anchoring piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/72Pile shoes

Abstract

The present invention relates to a screw-type reinforcement socket member of a head extension pile which is improved to secure stability, construction and economics, and assemblability for pile strength when supporting pile loads. The main screw portion is formed on one of the inner and outer circumferential surfaces of the distal end portion, and the auxiliary screw pipe portion formed with a screw is formed on any one of the inner and outer circumferential surfaces so as to be coupled thereto. As the assembly is completed with the screw-bonded reinforcement plate, it is possible to secure the tip support of the pile and provide the screw-type reinforcement socket member of the head extension pile that can be assembled and used conveniently in the field. There is.
Pile, Driving, Pile Cap, Screw Auger, Reader, Cement Paste

Description

Reinforcing Socket Member of Pile with an Extended Head}

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

Figure 2 is a view showing an inner threaded reinforcing socket member applied to the head-extension pile with the present invention.

Figure 3 is a view showing an outer threaded reinforcing socket member applied to the head-extension pile with the present invention.

Explanation of symbols on the main parts of the drawings

F: head extension file

10: reinforcement socket member

12: files

14: Main thread part

16: Auxiliary screw part

16: Auxiliary screw part

18: waterworks

20: reinforcement board

22: internal thread

24: external thread

The present invention relates to a screw-type reinforcement socket member of a head extension pile, and more particularly, to ensure the assembly, stability, constructability and economic efficiency of pile strength during pile construction to support the load of the structure. The present invention relates to a screw-type reinforcement socket member of a head extension pile which can be used immediately in the field while assembling and completing a reinforcement socket member larger than the diameter of the pile to secure the tip support force of the pile.

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, etc., and classified according to the construction method. 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 TF 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 pile up to ensure the assembly, stability, workability and economical efficiency of pile strength during pile construction to support the load of the structure Equipped with screw-in reinforcement socket member larger than the diameter of pile only by screwing on the inner and outer circumference of the front end of the buried side, it is possible to easily and quickly assemble it in the field to secure the tip bearing capacity of the pile. It is to provide a threaded reinforcement socket member of the head expansion pile.

The present invention for realizing this

In a pile having a constant diameter and length, and a head-expanded pile formed by a reinforcing plate larger than the pile diameter at the tip of the embedding side of the pile,

The main screw portion formed on the inner circumferential surface of the embedded end of the pile 12 and the external screw portion formed on the outer circumferential surface of the auxiliary screw pipe portion are screwed together, and a reinforcing plate connected vertically to the auxiliary screw tube portion is in close contact with the tip of the embedded side of the pile. The reinforcing plate is characterized in that the through-hole is formed at a position corresponding to the hollow center of the pile.

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

Figure 2 is a perspective view showing the inner threaded reinforcement socket member applied to the head-expanded pile according to the present invention, Figure 3 is a side cross-sectional view showing the outer threaded reinforcement socket member applied to the head-expanded pile according to the present invention. .

In the screw extension reinforcement socket member (10) of the head extension pile (F) is a head extension pile consisting of a pile of a certain diameter and length, and a reinforcement plate larger than the pile diameter at the end of the embedded side of the pile,

The main screw portion 14 formed on the inner and outer circumferential surfaces of the embedded end of the pile 12, the auxiliary screw pipe portion 16, and the auxiliary screw pipe portion 16 are vertically disposed to be screwed to the main screw portion 14. At the same time assembling is made by the reinforcing plate 20 is formed larger than the diameter of the pile 12 and the water hole 18 is formed in the portion corresponding to the center of the hollow portion of the pile.

The main screw portion 14 is formed on at least one of the inner and outer circumferential surfaces of the embedded end of the pile 12, the screw shape can be formed in various shapes, without being limited to any one form.

The auxiliary screw pipe part 16 is a tubular shape formed of an inner screw portion 22 and an outer screw portion 24 on any one of the inner and outer circumferential surfaces thereof.

And the reinforcing plate 20 is formed integrally with the auxiliary screw pipe portion 16 is formed larger than the diameter of the pile so as to be in contact with the ground to exert a strength.

The screw-coupled reinforcement socket member 10 is composed of an auxiliary screw pipe portion 16 and a reinforcing plate 20, the screw portion formed in the auxiliary screw pipe portion 16 can be formed in various forms according to the design. have.

Thereby, the main screw part 14 formed in the front-end | tip of the embedding side of the pile 12 can also be formed in the outer peripheral surface or the inner peripheral surface according to design.

The tip support force acting on the reinforcement plate 20 of the screw-type reinforcement socket member 10 is to act as the strength of the pile against the strength from the bottom or the wall of the pile hole.

The reinforcing socket member 10 is firmly coupled with the main screw portion 14 and the auxiliary screw pipe portion 16 not only for the ground strength that the reinforcing plate 20 receives from the bottom of the pile hole but also for the strength received from the hollow wall. 20) is integrally formed with the auxiliary screw pipe portion 16 by welding or the like to exert the tip bearing force of the head extension pile F.

And the reinforcement socket member 10 is formed in the area having a certain diameter of the reinforcing plate 20, while maintaining the extended pile tip support force, such as occupying the work space and uncomfortable work such as welding in the field when applying the pile The assembly workability is improved by assembling the head extension pile (F) by screwing without disturbing the copper wire.

The reinforcing socket member 10 is applied to piles, such as concrete piles, PHC, steel pipes, H-shaped steel and other composite pipes and wooden pipes having a diameter of 350, 400, 450, 500, 600 mm and the like provided.

For reference

Table 1 illustrates the dimensions and dynamics of the pile.

TABLE 1

Type of file Φ350 PHC Φ400 PHC Φ450 PHC Φ500 PHC File itself history (tf) 89 112 137 173 Peripheral frictional force (tf) 30.37 38.13 46.76 59.04 Tip bearing capacity (tf) 58.63 73.87 90.24 113.96 Diameter of existing pile (mm) 350 400 450 500 Existing pile cross section (㎠) 961.625 1256 1590 1963 Reinforcement part proper diameter (mm) 473 531 587 660 Reinforcement section cross section (㎠) 1759 2216 2707 3419

In the case of Φ 350 PHC in Table 1, the tip bearing capacity must be 58 tf to obtain the pile capacity of 89 tf. By the way, by the cross-sectional area 961.625 cm 2 of the existing pile having a diameter of 350 mm, it is not possible to obtain a tip support force of 58 tf. Therefore, in order to obtain the tip bearing force 58 tf, the cross section of the tip of the pile must be 1759 cm 2. That is, the diameter of the reinforcement portion needs to be extended to 473 mm.

In Table 1, in the case of Φ400, Φ450, and Φ500 PHC, the cross-sectional area of the tip end should be extended to 2216, 2707, 3419 ㎠, respectively, in order to utilize all pile strengths corresponding to the diameter of each pile. The diameter needs to be extended to 531, 587, 660 mm.

Table 2 illustrates the dimensions and dynamics of piles and stiffeners.

TABLE 2

Type of file Φ350 PHC Φ400 PHC Φ450 PHC Φ500 PHC File itself history (tf) 89 112 137 173 Peripheral frictional force (tf) 30.37 38.13 46.76 59.04 Tip bearing capacity (tf) 58.63 73.87 90.24 113.96 Diameter of existing pile (mm) 350 400 450 500 Existing pile cross section (㎠) 961.625 1256 1590 1963 Reinforcement Plate Proper Diameter (mm) 473 531 587 660 Reinforcement plate cross section (㎠) 1759 2216 2707 3419 Gusset plate diameter (mm) 123 131 137 160 Compressive stress (σc: tf / ㎠) 0.10 0.10 0.10 0.10 Thickness of Reinforcement Plate (mm) 10.8 11.1 11.3 12.2 Extrusion Length of Reinforcement Plate (a: mm) 62 66 69 80

Here, sigma c = 3 x tip bearing force / reinforcing plate cross section.

In the case of Φ350 PHC in Table 2, the tip bearing capacity is 58 tf to obtain 89 tf pile internal strength.The tip bearing capacity of 58 tf is obtained by the cross section 961.625 ㎠ of the existing pile with a diameter of 350 mm. Can't get it. Therefore, the cross-sectional area of the tip of the pile must be widened to obtain 58 tf of tip bearing capacity. In Table 2, the cross-sectional area of the reinforcing plate is 1759 cm 2 and the diameter is 473 mm, and the thickness t of the reinforcing plate is selected to be 10.8 mm.

In Table 2, in the case of Φ400, Φ450, and Φ500 PHC, the cross-sectional area of the reinforcement plate is extended to 2216, 2707, 3419 cm2, respectively, in order to utilize all pile strengths corresponding to the diameter of each pile. The diameters are expanded to 531, 587 and 660 mm. As can be seen from Table 2, the thickness of the reinforcement plate is formed thicker as the protrusion length of the reinforcement plate is larger.

The product is supplied in a state in which the head-extension pile F and the reinforcement socket member 10 prepared as described above are separated separately due to lack of on-site loading space.

Accordingly, in the field, the operator uses the reinforcement socket member 10 in which the external screw portion 24 is formed on the auxiliary screw pipe portion 16 when the main screw portion 14 is formed on the inner circumferential surface of the embedded side end portion of the head extension pile F. By combining.

If the main screw portion 14 is formed on the outer circumferential surface of the embedded side tip portion of the head extension pile F, the reinforcing socket member 10 having the inner screw portion 22 formed on the auxiliary screw pipe portion 16 may be coupled to each other.

That is, the reinforcement socket member 10 and the head-extension pile (F) can be transported and stacked in a state of being separated, it is useful to utilize the work space, such as not occupy much of the work space on the site.

As described above, since the reinforcement socket member 10 and the head extension pile F are conveniently assembled by screwing in the field, the pile construction can be carried out by inserting the drilled holes into the pile hole. Increased strength is achieved.

Within the scope of the technical spirit of the fastening and assembly means that can be applied to all steel pipes, concrete pipes, synthetic resin pipes, wood pipes, etc. using the head extension type of the present invention is within the scope of the present invention, and therefore the rights of the present invention Is infringing.

According to the present invention, the threaded reinforcement socket member 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 piles at the site quickly, the usability, portability, loadability, efficiency and economic efficiency of the piles can be greatly increased.

In addition, the main thread is formed on the inner circumferential surface or the outer circumferential surface of the screw-in reinforcement socket member formed in the auxiliary pile and the reinforcement plate of the existing pile and the head extension pile to secure the working space in the narrow site. In addition, the convenience of carrying and loading is increased, and the utilization of the existing file can be greatly increased.

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 30 ~ 40% loss of pile strength (LOSS), but with reinforcing socket members. If one head extension pile 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 design of the screw-coupled reinforcing socket member is applied to increase the pile strength, thereby reducing the number of piles, leading to cost reduction and shortening of air, while reducing the pile length. You can expect

Compared to the projected pile construction at the site, the head extension pile was installed and applied in the same way as before, and when the struck was done, the completion of pile construction at 50/20 ~ 10 resulted in sufficient design bearing capacity. There is.                     

Accordingly, it is a construction method that can achieve economic efficiency, safety, constructability, and secure working space compared to existing construction methods.

In addition, when the design strength is low in consideration of constructionability, the pile length can be reduced by about 20 to 40%, resulting in reduction of construction costs.

As a result, when the design history is increased by using the head extension file in the design, the number of files can be reduced by about 30 to 40%.

In addition, the pile pile is reduced in design, which can reduce the amount of concrete cement and reinforcing steel by about 10% to 20%. In addition, as the number of piles is reduced, the air can be significantly reduced. It is a very useful invention for civil engineering and construction industry because it has an outstanding effect that can significantly reduce ordinary expenses and financial expenses.

Claims (3)

  1. In a pile having a constant diameter and length, and a head-expanded pile formed by a reinforcing plate larger than the pile diameter at the tip of the embedding side of the pile,
    The main screw portion 14 formed on the inner circumferential surface of the embedded end portion of the pile 12 and the external screw portion 24 formed on the outer circumferential surface of the auxiliary screw pipe portion 16 are screwed to each other, and are vertically connected to the auxiliary screw pipe portion 16. The reinforcing plate 20 is in close contact with the tip of the buried side of the pile 12 and the reinforcing plate 20 has a water hole 18 formed at a position coinciding with the center of the hollow part of the pile 12. Screw-in reinforcement socket members of head-extension piles.
  2. delete
  3. delete
KR1020040049797A 2004-06-29 2004-06-29 Reinforcing Socket Member of Pile with an Extended Head KR100662053B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101039042B1 (en) * 2010-07-22 2011-06-03 강명석 Reinforcement structure for pile
KR101331218B1 (en) 2013-05-03 2013-11-20 김학진 Skin friction force and end bearing capacity reinforced multi section type pre-tensioned spun high strength concrete pile
KR101420844B1 (en) * 2012-02-22 2014-07-17 강명석 Reinforcement structure for pile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101294744B1 (en) * 2011-01-18 2013-08-16 반석기초이앤씨(주) Extended pile having inclined section

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550142U (en) * 1978-09-26 1980-04-02
JPH0596123U (en) * 1992-06-01 1993-12-27 シバタ工業株式会社 Protective work for steel transmission type erosion control dam
JP2000170160A (en) 1998-12-07 2000-06-20 Hokoku Eng Kk Steel pipe pile
KR20030069955A (en) * 2003-08-05 2003-08-27 이호경 The shoe for an up-and-down hem reinforcement of a steel pipe pile
KR20040052779A (en) * 2004-03-20 2004-06-23 윤 용 송 Pile with an Extended Head and working method of the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550142U (en) * 1978-09-26 1980-04-02
JPH0596123U (en) * 1992-06-01 1993-12-27 シバタ工業株式会社 Protective work for steel transmission type erosion control dam
JP2000170160A (en) 1998-12-07 2000-06-20 Hokoku Eng Kk Steel pipe pile
KR20030069955A (en) * 2003-08-05 2003-08-27 이호경 The shoe for an up-and-down hem reinforcement of a steel pipe pile
KR20040052779A (en) * 2004-03-20 2004-06-23 윤 용 송 Pile with an Extended Head and working method of the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
1020030069955 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101039042B1 (en) * 2010-07-22 2011-06-03 강명석 Reinforcement structure for pile
KR101420844B1 (en) * 2012-02-22 2014-07-17 강명석 Reinforcement structure for pile
KR101331218B1 (en) 2013-05-03 2013-11-20 김학진 Skin friction force and end bearing capacity reinforced multi section type pre-tensioned spun high strength concrete pile

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