KR20100076577A - Steel pipe pile - Google Patents

Steel pipe pile Download PDF

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Publication number
KR20100076577A
KR20100076577A KR1020080134677A KR20080134677A KR20100076577A KR 20100076577 A KR20100076577 A KR 20100076577A KR 1020080134677 A KR1020080134677 A KR 1020080134677A KR 20080134677 A KR20080134677 A KR 20080134677A KR 20100076577 A KR20100076577 A KR 20100076577A
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KR
South Korea
Prior art keywords
steel pipe
rotary blade
pipe body
rotary
attached
Prior art date
Application number
KR1020080134677A
Other languages
Korean (ko)
Inventor
정경수
정진안
Original Assignee
재단법인 포항산업과학연구원
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Application filed by 재단법인 포항산업과학연구원 filed Critical 재단법인 포항산업과학연구원
Priority to KR1020080134677A priority Critical patent/KR20100076577A/en
Publication of KR20100076577A publication Critical patent/KR20100076577A/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/56—Screw piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

Disclosed is a rotary penetration type steel pipe pile embedded in the ground.

The steel pipe pile, the cylindrical steel pipe body is formed through holes in the longitudinal direction; A semi-donut-type first rotary blade attached to protrude outward from the outer peripheral surface of the steel pipe body to be inclined at a predetermined angle to a surface perpendicular to the axial direction of the steel pipe body; Half attached to the opposite side of the outer peripheral surface portion of the front end of the steel pipe body to which the first rotary blade is attached in a direction staggered with the first rotary blade, the lowermost position is attached to have a position higher than the lowest end of the first rotary blade Donut-type second rotary blades; Characterized in that it comprises a.

According to the steel pipe pile, the first rotary blade and the second rotary blade can be asymmetrically arranged to form a rotary blade that is almost spiral, and thus, both the manufacturability and the excavation workability are excellent.

Description

Steel Pipe Pile with Asymmetrical Rotating Blades

The present invention relates to a rotary penetration type steel pipe pile buried in the ground by applying rotational force and downward propulsion force to a drive device installed on the ground, and more particularly, having an asymmetric rotary wing to facilitate the production and excellent excavation workability. It is about steel pipe pile.

In general, the foundation is installed on the ground to support the load of the upper structure, there are a shallow foundation and a deep foundation. The deep foundation among the foundations is used in the case where the upper strata are soft layers or the compressibility is not suitable as the support layer. Such deep foundations include pile foundations, peer foundations, caisson foundations, and the like.

Among the foundations, the method of constructing pile foundations includes a vertical construction method of vertically piled up piles and hitting the upper end of piles from above to install them in the ground, and inserting piles into the drilled holes after the ground is formed in advance. There is a method.

The type method is excellent in its supporting force by friction with the surrounding ground because the pile is inserted while pushing the soil of the surrounding ground when the pile is installed on the ground. However, the above-described method has a problem in that the upper end of the file is easily damaged due to the insertion of the file by hitting the upper end of the file, and its use in urban areas is limited due to noise and vibration during the hitting.

In contrast, the embedding method can eliminate noise and vibration and eliminate the problem of damaging the top of the pile.

An example of a rotary penetration type steel pipe pile used in the embedding method is disclosed in Korean Patent No. 683118. Steel pipe piles according to the prior art disclosed in the patent are shown in FIGS. 1 and 2. 1 is a perspective view schematically showing a rotationally penetrated steel pipe pile according to the prior art, Figure 2 is a longitudinal cross-sectional view of the rotationally penetrated steel pipe pile shown in FIG.

As shown in Fig. 1 and Fig. 2, the rotary penetration type steel pipe pile 10 according to the prior art is a steel pipe body 11 having a hollow portion 11a, and attached to the tip of the steel pipe body 11 and spiral It has a rotary blade 12 having. The upper end of the steel pipe body 11 is provided with a connection member 15, such as bolts, nuts so as to connect other steel pipe piles. In addition, the tip of the steel pipe body 11 may be provided with a bit for drilling excavation 13, the steel pipe pile for the transverse pressure of the ground on the inner circumferential surface of the steel pipe body 11 located at the top of the bit for drilling excavation 13 Reinforcement wing 14 may be installed to increase the resistance of the (10).

This rotary penetration type steel pipe pile 10 has the advantage that the drilling workability is excellent because the rotary blade 12 has a spiral. That is, when the excavation work can be minimized the disturbance between the steel pipe pile (10) and the ground by the spiral rotating blade 12, the frictional force between the side of the steel pipe pile (10) and the ground has the advantage that the pile has improved bearing capacity There is this.

However, since the rotary blade 12 is considerably thick in order to reinforce the resistance to the vertical force (typically about 35 mm), when the one side of the thick steel sheet is cut and deformed up and down to have a spiral, the rotary blade 12 It is extremely difficult to attach the rotary blade 12 to the steel pipe body 11 by the elastic restoring force of the steel sheet, which is a raw material.

That is, after cutting one side of a steel plate having a donut shape (the shape of which the center part is empty) and opening the cut part in the vertical direction, in order to attach the open ends to the steel pipe body 11 with a predetermined distance apart, the steel plate may be elastic. In addition to the need for a separate support for resisting the restoring force, in order to attach the steel plate to the steel pipe body 11 in a state where the steel sheet is spaced a predetermined distance in this way, the welding work must be performed to avoid interference of the separate support steel pipe There is a problem that the production of the file 10 is very difficult.

Furthermore, since the rotary blade 12 of the steel pipe pile 10 according to the prior art is welded to maintain a deformed state from one steel sheet, the welded portion of the steel pipe body 11 and the rotary blade 12 due to the elastic restoring force of the steel sheet. The continuous load is applied, which causes a problem that the welding part is easily broken when the steel pipe pile 10 is drawn into the ground, and thus the drilling performance of the steel pipe pile 10 cannot be secured.

The present invention is to solve at least some of the above-described problems, to provide a steel pipe pile having an asymmetric rotary blade that can be easily manufactured and stable drilling performance while having a rotary blade of a spiral-like shape The purpose.

In addition, an object of the present invention is to provide a steel pipe pile provided with an asymmetric rotary blade to share the load applied to the rotary blade, less disturbing work between the steel pipe pile and the soil to ensure a sufficient bearing capacity of the pile.

In order to achieve the above object, the present invention, the cylindrical steel pipe body formed with a through hole in the longitudinal direction; A semi-donut-type first rotary blade attached to protrude outward from the outer peripheral surface of the steel pipe body to be inclined at a predetermined angle to a surface perpendicular to the axial direction of the steel pipe body; Half attached to the opposite side of the outer peripheral surface portion of the front end of the steel pipe body to which the first rotary blade is attached in a direction staggered with the first rotary blade, the lowermost position is attached to have a position higher than the lowest end of the first rotary blade Donut-type second rotary blades; It provides a steel pipe pile having a rotary wing similar to the spiral.

Preferably, the first rotary blade and the second rotary blade may be formed by dividing a single donut-shaped steel plate having a through hole corresponding to the outer diameter of the steel pipe body in a central portion thereof.

Also preferably, the inclination angle of the first rotary blade and the second rotary blade and the surface perpendicular to the axial direction of the steel pipe body may be the same.

More preferably, the height of the highest point of the inner circumferential surface of the first rotary blade attached to the outer circumferential surface of the steel pipe body may be equal to or higher than the height of the lowest point of the inner circumferential surface of the second rotary blade attached to the outer circumferential surface of the steel pipe body.

As described above, according to an embodiment of the present invention, the rotating blade having a spiral-like shape is formed by using the first rotating blade and the second rotating blade, thereby making it easy to manufacture the rotating blade. That is, the rotary blade according to the prior art is attached to the steel pipe body in a state spaced apart in the vertical direction after cutting one side of one steel plate to attach the rotary blade to the steel pipe body due to the elastic restoring force of the steel plate itself forming the rotary wing. It was extremely difficult, and it was difficult to secure stable drilling performance due to cracks or breakages in the welded part, but the steel pipe pile according to an embodiment of the present invention separates one steel plate into two and then rotates the first rotating blade and the second. Since the rotary blades are installed in a flat state, it is easy to attach the rotary blades to the steel pipe body, and it is possible to prevent cracks or breakage from occurring in the welded portion by the elastic restoring force as in the prior art.

In addition, according to an embodiment of the present invention, since the rotary blade having a spiral-like shape by using the first rotary blade and the second rotary blade has less disturbance work between the steel pipe pile and the soil to ensure sufficient support of the pile. Can achieve the effect. In particular, when the height of the highest point among the inner circumferential surface of the first rotary blade and the height of the lowest point of the inner circumferential surface of the second rotary blade are equal, the first and second rotary blades can maintain a spiral-like shape on the outer circumferential surface of the steel pipe body. The disturbance between the pile and the ground can be minimized.

In addition, in the case where the heights of the lowermost ends of the first and second rotary blades are the same, the lower ends of the first and second rotary blades are in contact with the ground at the same time so that the load is concentrated on the lower ends of both rotary blades and the steel pipe pile There is a problem that the disturbance between the soil and the soil (ground) increases and thereby reduces the bearing capacity of the steel pipe pile, according to an embodiment of the present invention differently formed the position of the lower end of the first rotary blade and the second rotary blade As a result, the excavation work is primarily performed by the lower end of the first rotary blade contacting the ground first, and then the second rotary blade passes relatively easily from the lower end by the first rotary blade. Disturbance between the rotor blades and the ground can be reduced, thereby securing the bearing capacity of the steel pipe pile.

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

3 is a perspective view of a steel pipe pile according to an embodiment of the present invention, Figure 4 is a plan view of the steel pipe pile shown in Figure 3, Figure 5 is a front view of the steel pipe pile shown in Figure 3, Figure 6 is Figure 3 A plan view of a donut-shaped steel sheet for forming first and second rotary vanes of the steel pipe pile shown in FIG.

First, referring to FIGS. 3 to 6, the steel pipe pile 100 having an asymmetric rotary blade according to an embodiment of the present invention includes a cylindrical steel pipe body 110 having a through hole formed in a longitudinal direction, and the steel pipe body ( Two rotary vanes (120, 130) of the semi-donut type attached to the 110 is provided. In addition, a connection member 150 may be installed on the upper end of the steel pipe body 110 so as to be connected to another steel pipe pile.

The two rotary vanes 120 and 130 are attached by welding or the like so as to protrude outward from the outer circumferential surface at the tip of the steel pipe body 110. At this time, the two rotary blades (120, 130) are attached to be inclined by a predetermined angle on the surface perpendicular to the axial direction of the steel pipe body (110), but are attached to the steel pipe body (110) in a state arranged at a staggered angle.

That is, one of the two rotary vanes 120, the first half of the donut-shaped rotary vanes 120 is attached to protrude outward from the outer peripheral surface of the tip of the steel pipe body 110, in the axial direction of the steel pipe body 110 The second rotating blade 130 of the semi-donut type, which is attached to the vertical surface to be inclined by a predetermined angle θ 1 , of the steel pipe body 110 to which the first rotating blade 120 is attached. It is attached to the opposite side of the outer peripheral surface portion of the tip is intersected with the first rotary blade 120, that is, to cross each other when viewed from the front, a predetermined angle (θ 2 ) on the surface perpendicular to the axial direction of the steel pipe body (110) Attached so as to make incline.

At this time, the mounting angle (θ) of the first rotary blade 120 so that the first rotary blade 120 and the second rotary blade 130 has a shape similar to a spiral in a state attached to the steel pipe body (110). 1 ) and the mounting angle θ 2 of the second rotary blade 130 are preferably the same.

In addition, the position of the bottom end 131 of the semi-donut-shaped second rotary blade 130 in the state attached to the steel pipe body 110, the first rotary blade 120 is attached to the steel pipe body 110 It is preferable to have a position higher than the lowest end 121 in (shown as "H" in FIG. 5).

That is, the lower ends 121 and 131 of the first rotary vane 120 and the second rotary vane 130 are attached to the steel pipe body 120 while maintaining different heights.

As such, since the lower ends 121 and 131 of the first rotary vane 120 and the second rotary vane 130 maintain different heights, the lower end 121 of the first rotary vane 120 first contacts the ground. The excavation work is primarily performed, and since the second rotary blade 130 passes through the bottom 131 of the portion where the primary drilling is performed by the first rotary blade 120, the rotary blades 120 and 130 are interposed with the ground. The disturbance of the can be reduced, and thus can sufficiently secure the bearing capacity of the steel pipe pile (100). If the heights of the lower ends 121 and 131 of the first rotary blade 120 and the second rotary blade 130 are the same, the lower ends 121.131 of the first rotary blade 120 and the second rotary blade 130 are Simultaneous contact with the ground, the load is concentrated at the bottom of both rotary blades (120, 130) at the same time to increase the disturbance work between the steel pipe pile (100) and soil (ground), thereby reducing the bearing capacity of the steel pipe pile (100) However, according to the exemplary embodiment of the present invention, the lowermost positions of the first rotary blades 120 and the second rotary blades 130 are different from each other to prevent the above problems.

As described above, the steel pipe pile 100 according to an embodiment of the present invention, the first rotary blade 120 and the second rotary blade 130 are asymmetrical shape (different height from each other) steel pipe body 110 Since it is attached to the rotary blades 120, 130 has a spiral-like shape as a whole.

As such, the steel pipe pile 100 according to an embodiment of the present invention has the rotary blades 120 and 130 having a spiral-like shape by using the first rotary blade 120 and the second rotary blade 130. Less disturbing work between the soil and the soil is enough to secure the bearing capacity of the pile.

In particular, as shown in FIG. 5, the height of the highest point 122 of the inner circumferential surface 125 of the first rotary blade 120 and the height of the lowest point 132 of the inner circumferential surface 135 of the second rotary blade 130 are determined. When the same, since the first and second rotary blades (120,130) can maintain the most similar to the spiral shape on the outer peripheral surface of the steel pipe body (110) it is possible to minimize the disturbance work between the steel pipe pile (100) and the ground.

On the other hand, as shown in Figure 6, the first and second rotary blades (120, 130) of the steel pipe pile 100 according to the present invention is formed with a through hole 145 corresponding to the outer diameter of the steel pipe body 110 in the central portion One donut-shaped steel sheet 140 may be divided into two based on the central axis 141.

As such, since the first and second rotary blades 120 and 130 of the steel pipe pile 100 according to the present invention are formed separately from the donut-shaped steel sheet 140, the rotary blades 120 and 130 may be manufactured as well as the rotary blades 120 and 130. It is easy to attach to the steel pipe body 110, and furthermore it is possible to prevent the cracks or breakage from occurring in the welded portion between the steel pipe body 110 and the rotary blades (120, 130) by the elastic restoring force as in the prior art.

7 shows a front view of a steel pipe pile 100 according to another embodiment of the present invention.

The steel pipe pile 100 shown in Figure 7 is the second of the height of the highest point 122 of the inner circumferential surface of the first rotary wing 120 is attached to the outer peripheral surface of the steel pipe body 110 is attached to the outer peripheral surface of the steel pipe body 110 It is the same as the embodiment shown in FIGS. 3 to 6 except that the inner circumferential surface of the rotary wing 130 is higher than the height of the lowest point 132. In order to avoid unnecessary duplication, detailed description of the same or similar parts will be omitted.

Also in the case of the steel pipe pile 100 shown in Figure 7 is asymmetrical so that the rotary blades (120,130) similar to the spiral shape, that is because the height of the rotary blades (120,130) are alternately attached to the outer peripheral surface of the steel pipe body (110) 3 and 6, the same effect as that of the case can be obtained.

As such, the difference between the height of the highest point 122 of the first rotary blade 120 and the height of the lowest point 132 of the second rotary blade 130 is the mounting angle θ 1 of the first and second rotary blades 120 and 130. , θ 2 ) may be set as the disturbance between the rotary blades 120 and 130 and the ground is minimized in consideration of the thickness, the shape of the wing, and the like.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I want to make it clear.

1 is a perspective view schematically showing a rotary penetration steel pipe pile according to the prior art.

Figure 2 is a longitudinal sectional view of the rotatable steel pipe pile shown in FIG.

3 is a perspective view of a steel pipe pile according to an embodiment of the present invention.

4 is a plan view of the steel pipe pile shown in FIG.

5 is a front view of the steel pipe pile shown in FIG.

6 is a plan view of a donut-shaped steel sheet for forming the first and second rotary blades of the steel pipe pile shown in FIG.

7 is a front view of a steel pipe pile according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100 ... steel pipe pile 110 ... steel pipe body

120 ... 1st rotary blade 130 ... 2nd rotary blade

140 ... Donut Type Steel Plate

Claims (6)

Cylindrical steel pipe body formed with a through hole in the longitudinal direction; A semi-donut-type first rotary blade attached to protrude outward from the outer peripheral surface of the steel pipe body to be inclined at a predetermined angle to a surface perpendicular to the axial direction of the steel pipe body; Half attached to the opposite side of the outer peripheral surface portion of the front end of the steel pipe body to which the first rotary blade is attached in a direction staggered with the first rotary blade, the lowermost position is attached to have a position higher than the lowest end of the first rotary blade Donut-type second rotary blades; Steel pipe pile having an asymmetric rotary wing including a. The method of claim 1, The first rotary blade and the second rotary blade is a steel pipe pile having an asymmetric rotary blade, characterized in that formed in the center divided into two donut-shaped steel plate having a through hole corresponding to the outer diameter of the steel pipe body. The method of claim 2, The steel pipe pile having an asymmetric rotary blade, characterized in that the first rotary blade and the second rotary blade has the same shape. The method of claim 1, Steel pipe pile having an asymmetric rotary blades, characterized in that the inclination angle of the first rotary blade and the second rotary blade and the plane perpendicular to the axial direction of the steel pipe body. The method according to any one of claims 1 to 3, The height of the highest point of the inner circumferential surface of the first rotary blade attached to the outer circumferential surface of the steel pipe body is provided with an asymmetric rotary wing, characterized in that the same as the height of the lowest point of the inner circumferential surface of the second rotary blade attached to the outer circumferential surface of the steel pipe body Steel pipe pile. The method according to any one of claims 1 to 3, The height of the highest point of the inner circumferential surface of the first rotary blade attached to the outer circumferential surface of the steel pipe body is provided with an asymmetric rotary blade, characterized in that higher than the height of the lowest point of the inner circumferential surface of the second rotary blade attached to the outer circumferential surface of the steel pipe body. Steel pipe pile.
KR1020080134677A 2008-12-26 2008-12-26 Steel pipe pile KR20100076577A (en)

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KR1020080134677A KR20100076577A (en) 2008-12-26 2008-12-26 Steel pipe pile

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KR1020080134677A KR20100076577A (en) 2008-12-26 2008-12-26 Steel pipe pile

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101348237B1 (en) * 2011-11-21 2014-01-08 (주)아리터 Supporting pile and construction method thereof
KR101993819B1 (en) 2018-01-15 2019-09-30 (주)썬트랙 Supporting device for pv generation structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101348237B1 (en) * 2011-11-21 2014-01-08 (주)아리터 Supporting pile and construction method thereof
KR101993819B1 (en) 2018-01-15 2019-09-30 (주)썬트랙 Supporting device for pv generation structure

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