KR100869815B1 - Apparatus to upgrade end bearing capacity of pile and pile construction method - Google Patents

Apparatus to upgrade end bearing capacity of pile and pile construction method Download PDF

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Publication number
KR100869815B1
KR100869815B1 KR1020070032966A KR20070032966A KR100869815B1 KR 100869815 B1 KR100869815 B1 KR 100869815B1 KR 1020070032966 A KR1020070032966 A KR 1020070032966A KR 20070032966 A KR20070032966 A KR 20070032966A KR 100869815 B1 KR100869815 B1 KR 100869815B1
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KR
South Korea
Prior art keywords
steel pipe
pile
fixed
tip
concrete
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KR1020070032966A
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Korean (ko)
Inventor
임수용
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임수용
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Priority to KR1020070032966A priority Critical patent/KR100869815B1/en
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Publication of KR100869815B1 publication Critical patent/KR100869815B1/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
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/44Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
    • 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
    • E02D5/24Prefabricated piles
    • E02D5/28Prefabricated piles made of steel or other metals
    • 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

Abstract

An object of the present invention is to provide a method for expanding the tip end bearing capacity of a buried pile steel pipe and a buried pile construction method capable of increasing the bearing capacity of the steel pipe by increasing the tip cross-sectional area of the steel pipe and increasing the binding force with the tip of the steel pipe and concrete.
To this end, the support portion enlargement of the end portion of the steel pipe for buried pile according to the present invention, ribs fixed to the outside of the end of the embedded pile steel pipe, a donut-type expansion plate fixed to the bottom of the rib, shear fixing member fixed to the inside of the front end of the steel pipe And a reinforcing member fixedly supported by the shear fixing member inside the distal end of the steel pipe. In addition, the buried pile construction method according to the present invention, excavating the ground by using a screw to form an excavation hole, placing a concrete layer on the inner lower portion of the excavation hole to form a concrete layer, the end portion support capacity expansion device is fixed Inserting a steel pipe into the excavation hole and embedding the tip portion in the concrete layer, and filling the upper space of the concrete layer with the filling material has a technical feature.

Description

Apparatus to upgrade end bearing capacity of pile and pile construction method

1 is a view showing a process for constructing a pile pile according to the prior art.

Figure 2 is a perspective view showing a state in which the front end supporting force expanding device of the embedded pile steel pipes according to the present invention is installed.

3 is a cross-sectional view taken along the line A-A of FIG.

Figure 4 is a cross-sectional view showing a state in which the distal end portion of the steel pipe shown in Figures 2 and 3 is embedded in the concrete layer placed in the lower portion of the excavation hole.

5 is a view showing a process for constructing the embedded pile by the embedded pile construction method according to the present invention

<Description of Major Symbols in Drawing>

100: tip portion bearing expansion device 110: rib

120: expansion plate 130: shear fixing member

140: rebar member

The present invention relates to an expansion device for supporting the tip portion of a buried pile steel pipe and a method of constructing a buried pile, and more particularly, to increase the bearing capacity of the steel pipe by increasing the cross-sectional area of the steel pipe tip and to increase the bonding force between the steel pipe and the concrete. The present invention relates to a device for expanding the bearing capacity of the tip of a molten steel pipe and embedding pile construction.

In general, when constructing civil structures such as bridge bridges or bridges, bridges are built into the ground so that the structure can obtain sufficient support from the ground. Increase

Construction methods of piles that play such a role include a type pile method, a site-placed pile method, and an embedded pile method.

At this time, the type pile method is a method of hitting and drilling a steel pipe, the site-placement pile method is a method of forming a pile at the site by excavating into the casing and placing concrete in the casing after driving the casing to drive in. Is the method to secure the bearing capacity by laying the steel pipe pile after excavating the ground in advance.

The conventional pile construction process by the embedded pile construction method of the above-described pile construction method is shown in FIG.

According to the conventional buried pile construction method as shown, first excavating the ground using a screw (a) (b), and then filling the tip fixing liquid (concrete grout) from the bottom of the excavation hole to a predetermined height (typically 60 cm) (C) When the tip fixed liquid layer is cured to some extent, fill the fixed liquid (concrete grout) on the upper side (d), and then insert the steel pipe into the excavation hole so that the tip of the steel pipe is seated on the tip fixed liquid layer (e) ( f) This completes the construction process of the purchase pile.

However, in the case of the conventional embedded pile construction method as described above, since the cross-sectional area of the steel pipe is smaller than the drilling area of the excavation hole, the supporting force of the tip portion due to the load acting in the lateral direction is weak.

That is, since a gap is formed between the lower end of the steel pipe and the side wall of the excavation hole, there is a concern that the steel pipe may flow as much as the gap when a load is applied in the lateral direction.

In addition, the concrete is injected into the excavation hole and the steel pipes are erected so that the two materials having different characteristics must be combined, so that the bonding force is reduced, and thus the tip bearing capacity of the steel pipe is also weakened.

Accordingly, the present invention has been made in order to solve the conventional problems as described above, and to expand the end portion bearing capacity of the buried pile steel pipe that can increase the bearing capacity of the steel pipe by expanding the cross-sectional area of the end of the steel pipe and buried pile construction method The purpose is to provide.

In addition, an object of the present invention is to provide a distal end portion bearing capacity expansion device and a buried pile construction method of the steel pipe for embedded piles to increase the bearing capacity of the steel pipe by increasing the bonding force with the front end portion of the steel pipe and concrete.

In order to achieve the object as described above, the end portion bearing capacity expansion device of the embedded pile steel pipe according to the present invention, ribs fixed to the outside of the front end of the embedded pile steel pipe, donut type expansion plate fixed to the bottom of the ribs, the end of the steel pipe There is a technical feature that comprises a shear fixing member fixed to the inside, and a reinforcing member fixed by the shear fixing member inside the front end of the steel pipe.

In the above-described configuration, at least two ribs are provided and are fixed radially with respect to the steel pipe.

In the above configuration, the reinforcing member forms a net.

In the above-described configuration, the shape of the shear fixing member is any one of the 'L' shape, 'ㄷ' shape and bolt shape.

In addition, in order to achieve the object described above, the buried pile construction method to which the tip portion bearing capacity expanding device of the buried pile steel pipe according to the present invention is applied, excavating the ground using a screw to form an excavation hole, the inner side of the excavated hole Forming concrete layer by placing concrete in the lower part, inserting a steel pipe fixed with a tip support capacity expansion device into an excavation hole and embedding the tip part in the concrete layer, and filling the upper space of the concrete layer with a filler There is a technical feature to what is done.

In the above-described configuration, the filler is any one of soil, sand and concrete.

Hereinafter, the features and the operation of the components as described above will be described in more detail with reference to preferred embodiments of the distal end portion bearing capacity expansion device and the embedded pile construction method of the embedded pile steel pipe according to the present invention.

As shown in Figures 2 to 4, the tip portion supporting force expanding device 100 of the embedded pile steel pipe according to the present invention, ribs 110, ribs 110 is fixed to the outer end of the embedded pile steel pipe (1) Expansion plate 120 is fixed to the bottom of the), the shear fixing member 130 is fixed to the inside of the front end of the steel pipe (1), and the reinforcing member 140 is fixed by the shear fixing member (130).

The rib 110 is provided with a plurality of ribs and fixed to the outside of the tip of the steel pipe 1 by welding. The rib 110 is fixed radially with respect to the steel pipe 1, and the bottom thereof coincides with the bottom surface of the steel pipe 1.

The rib 110 supports the expansion plate 120 with respect to the steel pipe (1), and is embedded in the concrete layer is formed by placing concrete in the lower portion of the excavation hole during the construction of the embedded pile.

The above-described expansion plate 120 is a donut-shaped disk, fixed to the bottom of the rib 110 by welding, the inner diameter of which matches the inner diameter of the steel pipe, the outer diameter is larger than the outer diameter of the steel pipe and smaller by a smaller difference than the inner diameter of the drilling hole. Is formed.

As such, the expansion plate 120 is firmly fixed to the front end of the steel pipe (1) and the outer diameter is formed larger than the outer diameter of the steel pipe serves to enlarge the diameter of the front end of the steel pipe.

Therefore, when the steel pipe 1 is inserted into the excavation hole, the gap formed between the steel pipe 1 and the side wall of the excavation hole is smaller than the gap formed between the conventional steel pipe without the expansion plate and the side wall of the excavation hole. The supporting capacity of the tip of the steel pipe is increased.

The aforementioned shear fixing member 130 is fixed by welding to the inside of the tip end of the steel pipe 1 to support the rebar member 140 with respect to the steel pipe 1, 'L' shape or 'c' shape It is not limited thereto and may have a bolt shape (stud bolt).

The reinforcing member 140 is formed in the form of a net, and may be formed in a net of a circular tube shape in accordance with the shape of the steel pipe 1, or may be formed of a plate-shaped net crossing the inner end of the steel pipe 1. Alternatively, the present invention is not limited thereto, and the inside of the tip portion of the steel pipe 1 may be formed in a cross-shaped net.

At this time, the rebar member 140 is firmly fixed to the shear fixing member 130 using a wire not shown.

The reinforcing member 140 serves to increase the bonding force between the concrete and the steel pipe by being integrated with the concrete when the bottom of the steel pipe (1) is embedded in the concrete layer when the embedded pile is inserted into the bottom of the steel pipe (1). .

Hereinafter, a process of constructing the embedded pile by using the steel pipe to which the tip portion supporting force expanding device according to the present invention configured as described above is applied will be described with reference to FIG. 5.

First, the ground is excavated using the screw (2) to form an excavation hole (a).

Then, concrete is poured in the lower part of the excavation hole 3 to a predetermined height (typically 60 cm) to form the concrete layer 4 (b).

Subsequently, after inserting the fixed steel pipe 1 into the excavation hole 3, the distal end supporting force expanding apparatus 100 according to the present invention is embedded in the concrete layer 4 (c).

At this time, the rib 110, the expansion plate 120, the shear fixing member 130 and the reinforcing member 140 fixed to the distal end of the steel pipe (1) is also completely embedded in the concrete layer (4) and the concrete layer (4) As concrete is cured, it is integrated with concrete.

In addition, the outer diameter of the expansion plate 120 fixed to the bottom of the front end of the steel pipe 1 is formed with a smaller difference than the diameter of the excavation hole (3), thereby preventing the flow of the front end of the steel pipe (1).

That is, the steel pipe 1 does not incline even if a load in the lateral direction is applied to the steel pipe 1.

In addition, the concrete is introduced into the front end portion of the steel pipe (1), and the reinforcing member 140 and the large concrete is integrated, so that the steel pipe and the steel pipe due to the reinforcing member 140 than when only the steel pipe and the concrete is combined as conventionally The bonding force between the concrete is further increased.

When the installation of the steel pipe (1) is completed, the construction of the embedded pile is completed by filling the filling material (5), such as earth and sand or sand or concrete dug during the construction of the excavation hole (3) to the upper space of the concrete layer (4). (d)

At this time, if the filling with soil or sand can reduce the construction cost than filling with concrete, when using the concrete as the filler 5 is increased safety. When the filling material 5 uses soil or sand, since the bearing capacity of the steel pipe 1 is secured by the tip bearing capacity expanding device 100 fixed to the tip of the steel pipe 1, there is a problem in the bearing capacity of the steel pipe 1. none.

As described above with reference to the accompanying drawings, but the construction method of the tip portion bearing capacity expanding device and the embedded pile of the steel pile for embedded pile according to a preferred embodiment of the present invention, the present invention is described in detail in the embodiments and drawings Without being limited, various modifications may be made within the technical spirit of the invention.
For example, an H beam may be used instead of the steel pipe according to the present invention. In this case, a shear fixing member and a rebar member are installed in both grooves of the H beam. Such embodiments should also be considered to be included within the scope of the invention.

According to the construction method of the end portion bearing capacity expansion device of the present invention embedded pile steel pipe configured as described above and the embedded pile, by using the rib and expansion plate fixed to the lower end of the steel pipe to enlarge the cross-sectional area of the end of the steel pipe, the side wall of the steel pipe and the excavation hole The gap between them is narrowed to increase the bearing capacity of the tip of the steel pipe.

In addition, the present invention by fixing the shear fixing member to the inside of the front end of the steel pipe and the reinforcing member fixed to the shear fixing member, the concrete flows into the tip of the steel pipe when the tip of the steel pipe is embedded in the concrete layer placed in the lower excavation hole It is integrated with the rebar member. Therefore, the coupling force between the concrete and the steel pipe is increased, thereby increasing the bearing capacity of the tip of the steel pipe.
On the other hand, according to the present invention, since the diameter of the steel pipe is smaller than the conventional, the manufacturing cost of the steel pipe is reduced, it is possible to reduce the construction cost of the embedded pile as a whole.

Claims (6)

  1. Rib 110 is fixed to the outer end of the embedded pile steel pipe (1), the donut-shaped expansion plate 120 is fixed to the bottom of the rib 110, and shear fixed to the inner end of the steel pipe (1) In the front end supporting force expanding device of the steel pipe for embedded piles comprising a fixing member 130 and a reinforcing member 140 fixedly supported by the shear fixing member 130 inside the front end of the steel pipe (1),
    The rib 110 is provided with at least two or more and is fixed radially with respect to the steel pipe (1), the shape of the shear fixing member 130 is any one of the 'L' shape, 'c' shape and bolt type End portion support capacity expansion device of the steel pipe for the embedded pile.
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KR1020070032966A 2007-04-03 2007-04-03 Apparatus to upgrade end bearing capacity of pile and pile construction method KR100869815B1 (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101011322B1 (en) * 2010-03-23 2011-01-28 신세계건설(주) Tip open pile having reinforcing apparatus for buried pile
CN102031776A (en) * 2010-12-30 2011-04-27 上海市城市建设设计研究院 Steel pipe pile
WO2011059145A1 (en) * 2009-11-12 2011-05-19 Lim Cheol Structure using steel pile
KR200459851Y1 (en) * 2009-11-12 2012-04-19 주식회사 스페이스테크놀로지 Bridge construction structure using steel pipe pile and composition beam for bicycle only
KR101136945B1 (en) 2010-01-27 2012-04-19 주식회사 스페이스테크놀로지 An earthquake-proof house and building
KR101226138B1 (en) * 2011-01-24 2013-01-28 이창남 Pile foundation without column footing and its construction method
KR101507113B1 (en) * 2013-12-20 2015-03-30 삼보이엔씨 주식회사 Construction method of large diameter pile in water and guide structure for the same
CN107130591A (en) * 2016-02-26 2017-09-05 中国二十冶集团有限公司 Deep basal pit soft soil foundation steel pile casting manual digging pile construction method
US9945088B2 (en) 2014-03-19 2018-04-17 Asahi Kasei Construction Materials Corporation Steel pipe pile with spiral blades, composite pile, and construction method of composite pile
KR20180091494A (en) 2017-02-07 2018-08-16 유진지오 주식회사 Bored pile with improved end bearing capacity
KR20190000078U (en) 2017-06-29 2019-01-08 노태현 Apparatus for strengthening the ground
KR101997130B1 (en) 2019-01-31 2019-07-08 주식회사 스페이스테크놀로지 Steel pipe pile with end enlargement unit and pile method for improving earthquake-proof performance using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020083583A (en) * 2001-04-27 2002-11-04 임철 Reinforcement plate of bolt type pile and pile construction method
KR20060024826A (en) * 2006-02-02 2006-03-17 이엑스티 유한회사 Working method of pile with an extended head
KR20060042370A (en) * 2004-11-09 2006-05-12 송기용 Pile with an extended head reinforced cement paste or concrete

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020083583A (en) * 2001-04-27 2002-11-04 임철 Reinforcement plate of bolt type pile and pile construction method
KR20060042370A (en) * 2004-11-09 2006-05-12 송기용 Pile with an extended head reinforced cement paste or concrete
KR20060024826A (en) * 2006-02-02 2006-03-17 이엑스티 유한회사 Working method of pile with an extended head

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011059145A1 (en) * 2009-11-12 2011-05-19 Lim Cheol Structure using steel pile
KR200459851Y1 (en) * 2009-11-12 2012-04-19 주식회사 스페이스테크놀로지 Bridge construction structure using steel pipe pile and composition beam for bicycle only
KR101136945B1 (en) 2010-01-27 2012-04-19 주식회사 스페이스테크놀로지 An earthquake-proof house and building
KR101011322B1 (en) * 2010-03-23 2011-01-28 신세계건설(주) Tip open pile having reinforcing apparatus for buried pile
CN102031776A (en) * 2010-12-30 2011-04-27 上海市城市建设设计研究院 Steel pipe pile
KR101226138B1 (en) * 2011-01-24 2013-01-28 이창남 Pile foundation without column footing and its construction method
KR101507113B1 (en) * 2013-12-20 2015-03-30 삼보이엔씨 주식회사 Construction method of large diameter pile in water and guide structure for the same
US9945088B2 (en) 2014-03-19 2018-04-17 Asahi Kasei Construction Materials Corporation Steel pipe pile with spiral blades, composite pile, and construction method of composite pile
CN107130591A (en) * 2016-02-26 2017-09-05 中国二十冶集团有限公司 Deep basal pit soft soil foundation steel pile casting manual digging pile construction method
CN107130591B (en) * 2016-02-26 2019-07-30 中国二十冶集团有限公司 Deep basal pit soft soil foundation steel pile casting manual digging pile construction method
KR20180091494A (en) 2017-02-07 2018-08-16 유진지오 주식회사 Bored pile with improved end bearing capacity
KR20190000078U (en) 2017-06-29 2019-01-08 노태현 Apparatus for strengthening the ground
KR101997130B1 (en) 2019-01-31 2019-07-08 주식회사 스페이스테크놀로지 Steel pipe pile with end enlargement unit and pile method for improving earthquake-proof performance using the same

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