KR101618723B1 - Reinforcing structure of the steel pipe for the retaining CIP wall - Google Patents

Reinforcing structure of the steel pipe for the retaining CIP wall Download PDF

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Publication number
KR101618723B1
KR101618723B1 KR1020150112937A KR20150112937A KR101618723B1 KR 101618723 B1 KR101618723 B1 KR 101618723B1 KR 1020150112937 A KR1020150112937 A KR 1020150112937A KR 20150112937 A KR20150112937 A KR 20150112937A KR 101618723 B1 KR101618723 B1 KR 101618723B1
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South Korea
Prior art keywords
steel pipe
reinforcing
support
cip
pipe
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KR1020150112937A
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Korean (ko)
Inventor
전금석
김영기
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주식회사 씨엠파트너스건축사사무소
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • E02D17/083—Shoring struts

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

The present invention relates to a structure of a thumb pile inserted into a rock bed in the ground for constructing a CIP earth retaining wall. In order to construct a thumb pile having a CFT structure in an underground hole located between a plurality of continuous CIP piles, Wherein a height between a lower end of the steel pipe and a front end of the support is greater than a height of a slime accumulated on a bottom surface of the perforation hole, And a concrete filling hole is formed between the lower end of the slurry and the surface of the slime.

Figure R1020150112937

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure of a steel pipe for a cemented earth retaining wall,

The present invention relates to a structure of a thumb pile inserted into a rock bed in the ground for constructing a CIP earth retaining wall, more specifically, to exclude an expensive H-shaped steel which is generally inserted into a pile in order to ensure bending stiffness of the thumb pile And more particularly, to a reinforcing support structure for a steel pipe for a thumb pile, which makes it possible to use an economical CFT steel pipe structure.

With the continuous economic growth of Korea, the concentration of large cities in the population is required to utilize the land efficiently. Therefore, the construction of the high-rise buildings and the construction of the underground buildings with great depth to maximize the utilization of the underground space are greatly increased have.

Therefore, the structure and the construction method of the earth retaining wall suitable for the excavation of the great sea have been continuously developed. However, in 2009, one of the research institutes of Pangyo has lost a wall due to the collapse of the earth retaining wall There is a constant collapse of the earth wall.

Most of these accidents are due to the inability to adequately cope with horizontal deformation of the earth retaining walls caused by the back earth pressure.

On the other hand, among the construction methods of the retaining wall, the earth retaining walls using the CIP method can be applied to almost all the grounds regardless of the ground conditions, and after the completion of the excavation, the outer retaining wall and the concrete wall of the underground structure can be constructed, And it is applied in many places in the urban area.

In the method of constructing the CIP earth retaining wall, a perforation hole is formed by using an equipment such as Earth Auger at the boundary of the excavated soil before starting the excavation work to form a perforation hole, and then a reinforced concrete structure is formed in the perforation hole, And the piles are continuously installed in a main heating type to form an earth retaining wall.

On the other hand, since the back earth pressure acting on the earth retaining walls in the excavation works or the ground water having a high groundwater level is much greater than that in the general case, the H-shaped steel is buried in the CIP concrete at regular intervals to form the thumb piles. The H-beam extends to the required depth of the rock bed.

However, since the H-shaped steel is an expensive member and can not be recovered, the construction cost is increased. Therefore, in recent years, there has been an increasing tendency to use a CFT steel pipe which has been proved to exhibit high rigidity due to the effect of synthesis or constraint of steel pipe and concrete to be used for reinforcing the stiffness of the earth retaining wall.

As shown in FIG. 1, the earth retaining wall using the CFT steel pipe for rigid reinforcement has a structure in which a steel pipe is inserted into a perforation hole instead of embedding H-shaped steel in a CIP concrete, concrete is placed in the steel pipe, It is utilized as a thumb pile of earth retaining wall. At this time, the gap between the steel pipe and the perforation hole is backfilled.

However, the method of increasing the stiffness of the earth retaining wall by constituting the CFT steel pipe as a part of the CIP earth retaining wall as described above is more advantageous than the method of embedding the H steel pipe in the existing CIP concrete as well as the construction is easy and economical. It is difficult to control the horizontal deformation of the earth retaining wall and the earth wall may be collapsed at the end of the earthquake.

First, it is practically impossible to completely remove the slime accumulated on the bottom surface of the drilled hole to insert the steel pipe. Therefore, the lower end of the steel pipe can not be fixed on the rock bed of the support layer and is placed on the slime, and the vertical load on the upper part causes an immovable settlement on the retaining wall, which disrupts the integral of the retaining wall, The order performance is significantly reduced, causing another deformation of the earth retaining wall.

Second, since the perforation hole is formed to be larger than the outer diameter of the steel pipe, a clearance is generated between the outer wall of the perforation hole and the steel pipe, and the concrete is not normally poured into the gap. The shear force and the bending moment due to the horizontal load are the largest at the lower end of the thumb pile, and the lower end of the steel pipe constituting the upper end So that it has a structure that is very vulnerable to horizontal displacement.

KR 10-1995-0011722 B1

Kim, Seungwook, Importance of Horizontal Displacement Management in Welded Wall for Deep Excavation in Safe Urban Area, 2014. 8.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a CIP earth retaining wall capable of stably supporting a vertical load, And it is an object of the present invention to provide a reinforcement support structure of a CIP earth retaining wall steel pipe for a pile having sufficient bending stiffness.

Another object of the present invention is to provide a reinforcing support structure for a CIP earth retaining wall for a pile of a thundering pile, which can be easily applied to various site conditions depending on the soil and the like.

According to the most preferred embodiment of the present invention for solving the above problems, there is provided a structure for reinforcing a steel pipe to be inserted in order to construct a thumb pile having a CFT structure in a perforation hole located between a plurality of continuous CIP piles A height h1 between the lower end of the steel pipe and the front end of the support is greater than a height h2 of the slime accumulated on the bottom surface of the perforation hole, And a concrete filling hole is formed between the lower end of the slip and the surface of the slime, and a reinforcing support structure for a steel pipe for a thumb pile of the CIP earth retaining wall is provided.

At this time, the support member may be integrally formed at the lower end of the steel pipe, or may be provided in a connection block having a through hole formed therein, and may be formed separately from the steel pipe.

Further, the connection block may be provided with reinforcing means composed of a reinforcing plate or a reinforcing bar, and the reinforcing means is configured to reach a reinforcing range R for bending moment and shearing force.

According to another preferred embodiment of the present invention, the connecting block is provided with a height adjusting pipe for inserting a supporting bar, and a height between the lower end of the steel pipe and the front end of the supporting bar is set according to the degree of insertion of the supporting bar into the height adjusting pipe Wherein the steel pipe supporting structure for the thumb pile of the CIP earth retaining wall is provided.

According to another preferred embodiment of the present invention, the supporting block is provided at the lower end of the connecting block having the same cross section as the steel pipe, and a plurality of mounting blocks are attached to the inner surface of the upper end of the connecting block, So that when the connecting block is connected to the steel pipe, the protruding portion of the mounting block is inserted into the steel pipe so that the longitudinal center axis of the connecting block is aligned with the longitudinal center axis of the steel pipe. Is provided.

The reinforcing support structure of the steel pipe according to the present invention is formed to be able to support the vertical load by supporting the CIP earth retaining wall with the CFT structure to improve the economical efficiency and to directly support the rock mass, It is possible to prevent the cracks due to the immersion and the like and to maintain the structural integrity continuously.

Further, the reinforcing support structure of the steel pipe according to the present invention facilitates the filling of the concrete with respect to the perforation hole in the vicinity of the near portion, thereby forming the fixation end of the thumb pile, thereby minimizing the horizontal deformation due to the back earth pressure of the CIP earth retaining wall Let's do it.

In addition, the reinforcing support structure of the steel pipe according to the present invention can reinforce the end portion of the thumb pile, in which the shear force and the bending moment are greatest, and thereby the thumb pile itself can exhibit sufficient strength.

Further, the reinforcing support structure of the steel pipe according to the present invention can adjust the length of the support depending on the height of the slime, so that it can be used universally without regard to various conditions of the site.

1 is a perspective view of a CIP earth retaining wall of a CFT structure constructed according to the prior art.
2 is a perspective view of a CIP earth retaining wall having a CFT structure to which a reinforcing support structure according to an embodiment of the present invention is applied.
3 is a perspective view showing a reinforcing support structure of a steel pipe according to the first embodiment of the present invention and a sectional view of an example applied to a perforation hole.
4 and 5 are a perspective view and a sectional view showing an example of a reinforcing support structure of a steel pipe according to a second embodiment of the present invention.
6 and 7 are a perspective view and a cross-sectional view showing still another example of a reinforcing support structure of a steel pipe according to a second embodiment of the present invention.
8 is a cross-sectional view showing a reinforcing support structure of a steel pipe according to a third embodiment of the present invention.
9 is a perspective view and a cross-sectional view showing a reinforcing support structure of a steel pipe according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in order to obscure or obscure the technical idea of the present invention due to the detailed description of the known structure in describing the present invention, the description of the structure of the above known structure will be omitted.

2 is a cross-sectional view of a CIP earth retaining wall constructed using a steel pipe structure according to an embodiment of the present invention.

2, a reinforcing steel pipe 210 inserted to form a thumb pile 200 having a CFT structure in a hole in the ground located between a plurality of continuous CIP piles 100, as shown in FIG. 2 Wherein the upper end of the thumb pile (200) is supported directly on the rock layer and the concrete (C) is placed in the vicinity of the rigid end (A) It is constructed to cope with the bending moment and shear force generated by the load.

As a basic means for accomplishing this, the present invention provides a plurality of support rods 220 at a predetermined interval at the lower end of the steel pipe 210.

The support base 220 is constructed to easily pierce a slime 21 piled on the bottom surface of the perforation hole 20 and has a length such that the tip of the slime 21 is slid Is longer than the height (h2)

The height h1 between the lower end of the steel pipe 210 and the front end of the support 220 is larger than the height h2 of the slime 21 accumulated on the bottom surface of the perforation hole 20, A concrete filling hole 221 is formed between the lower end and the surface of the slime 21.

In addition, the steel pipe may further include a flow hole 222 through which the concrete flows in the gap with the perforation hole.

The concrete filling hole 221 can easily flow the concrete C placed inside the steel pipe 210 between the perforation hole 20 and the steel pipe 210 in the near position A, Of the fixed end 40 with respect to the lower end of the fixed end 40.

Although the shape of the steel pipe 210 is shown as a circular cross-section, the cross-sectional shape of the steel pipe 210 is not particularly limited as long as it does not contradict the technical idea of the present invention It can be constructed in various shapes such as square or hexagonal.

FIG. 3 illustrates a first embodiment of the present invention relating to the structure of the support 220 described above. The support 220 is integrally formed at the lower end of the steel pipe 210.

The steel pipe 210 having the support rods 220 integrally formed therein can be immediately used in the field after it is manufactured in a factory. The length of the support table 220 should be longer than the height h2 of the slim 21 so that the steel pipe 210 may be subjected to a preliminary investigation or prediction on a site condition such as soil quality, The concrete filler 221 must be designed and manufactured to have a sufficient size.

However, it is difficult to predict the height (h2) of the slime (21) that can not be removed from the bottom of the perforation hole (20) before the drilling operation in some cases, It is not. In order to solve such a problem, in the second embodiment of the present invention, the steel pipe 210 and the supporting stand 220 are separately manufactured and have a structure to be assembled in the field.

4A and 4B show a second embodiment of the present invention in which FIG. 4A shows a state in which the steel pipe 210 and the support member 220 are separated from each other, FIG. 4B shows a state in which the support pipe 220 is attached to the steel pipe 210 And Fig.

In the second embodiment, a steel pipe 210 and a support 220 are separately manufactured at a factory, and they are assembled and integrated in the field and then inserted into the perforation hole 20. [

As described above, the supporting block 220, which is manufactured separately from the steel pipe 210, is provided in the connecting block 230 at a predetermined interval.

The cross-sectional shape of the tip of the supporter 220 is not particularly limited. In other words, the tip of the support member 220 may be pointed at its tip as shown in FIG. 4, in which case the slider can be easily digged to facilitate the seating of the slider.

Also, the surface of the tip of the supporter 220, which is not shown, but which is seated on the rock, may have a square or circular surface shape. The cross section of such a planar shape makes it possible to constitute the cross-sectional area of use of the steel material at the end of the steel pipe structure to be equal to or larger than the cross-sectional size of the steel pipe 210. Thus, unnecessary excavation Do not add processes.

The cross-sectional shape of the tip of the support table 220 in the second embodiment is applied to all the embodiments that are separately manufactured from the steel pipe 210, and the same applies to the third embodiment which will be described later.

The connection block 230 has a through hole 231 formed therein and has a shape of a washer and is integrally connected to the steel pipe 210 so that the support block 220 is integrally formed at the lower end of the steel pipe 210. [ This eliminates the inconvenience of attaching and fixing the support table 220 individually to the lower end of the steel pipe 210, thereby simplifying the work in the field. The through hole 231 serves as a passage through which the concrete C installed in the steel pipe 210 flows toward the support table 220.

In this case, it is preferable that the axis O of the support 220 coincides with the cross-sectional axis O 'of the steel pipe 210. This is because the transmission of the anti- There is an advantage that it becomes.

4 (b), the connection block 230 is formed to have a size protruding from the outer surface of the steel pipe 210, and the protruding portion is welded to the welded portion w1 ).

The support block 220 may be provided in the connection block 230 in a variety of sizes according to the length of the support block 220. The height of the slurry 21 accumulated in the perforation hole 20 it is possible to select and use the supporter 220 of the required standard corresponding to the hz2, so that the applicability in the field is improved.

On the other hand, on the upper surface of the connecting block 230, that is, on the opposite side of the surface to which the support 220 is attached, a shear force and a bending moment are generated at the lower end of the thumb pile 200, Further reinforcing means for increasing rigidity can be provided.

The reinforcing means is configured to reach the reinforcing range R with respect to the bending moment and the shearing force while being positioned inside the steel pipe 210. As shown in Figs. 4 and 5, one or more reinforcing plates And a plurality of reinforcing bars 252 made of a long member such as a reinforcing bar as shown in FIGS. 6 and 7.

It is preferable that the reinforcement means are arranged symmetrically on the transverse plane of the steel pipe 210 so that the strength of the steel pipe 210 can be reinforced under the same conditions regardless of the direction of the steel pipe 210.

When the reinforcing plate 251 is formed on the upper surface of the connection block 230, the reinforcing plate 251 may be a reinforcing means for shearing and bending stiffness or a reinforcing plate for supporting the reinforcing plate 251 on the inner surface of the steel pipe 210 The connection block 230 and the steel pipe 210 can be easily connected to each other without installing the insertion protrusion 232 to be described later. Figure 5 shows such an embodiment in cross-section.

6 (a) and 6 (b) are views showing an example in which the reinforcing means is constituted by a plurality of reinforcing bars 252, wherein (a) and (b) 7 is a perspective view and a cross-sectional view showing an example in which the reinforcing bar 252 is positioned on the inner side while the reinforcing bar 252 is aligned with the cross section axis O ' Axis in Fig.

7, when the respective axes of the supporter 220 and the supporter 252 coincide with each other, the supporter 220 not only functions as an effective reinforcing means in the extension line and the extension line 252, It is possible to complete the installation by one welding operation, thereby making it easy to manufacture.

When the reinforcing means is constituted by a longitudinal member as in the present embodiment, the connecting block 230 may be further provided with an insertion protrusion 232 for facilitating the connection with the steel pipe 210. [

The insertion protrusions 232 are symmetrically formed in the shape of a circular band or a plurality of slices on the upper surface of the connection block 230 to be inserted into the steel pipe 210 so that the connection block 230 is inserted into the steel pipe 210 .

The second embodiment relating to the support table 220 according to the present invention allows any one of the structures of the supports 220 having different specifications to be selected and attached to the steel pipe 210. However, In this embodiment, one support 220 can have a variety of specifications, thereby further improving economical efficiency and versatility.

Fig. 8 is a perspective view of such a third embodiment.

8, the connection block 230 connected to the steel pipe 210 is provided with a height control pipe 240, and the support pipe 220 is connected to the height control pipe 240 in the connection block 230.

The height h1 between the lower end of the steel pipe 210 and the front end of the support 220 is set according to the degree of insertion of the support 220 into the height adjusting pipe 240, It is possible to apply the present invention to the perforation holes 20 of various conditions without preparing various standards having different lengths of the support members 220 attached to the perforated holes 20. In addition, the reinforcing bar 252 can be formed at the same time as the support bar 220 is installed in the field.

The height adjusting pipe 240 may further include a weld portion w2 for welding with the support 220.

9 is a perspective view illustrating a connection block 230 having a support 220 in accordance with a fourth embodiment of the present invention. FIG. 9A is a perspective view showing a configuration of the connection block 230 and the support 220, The supporting block 220 is integrally formed at the lower end of the connecting block 230 connected to the lower end of the steel pipe 210.

The supporting block 220 is provided at a lower end of a connecting block 230 having the same cross section as the steel pipe 210 and a plurality of mounting blocks 253 are attached to the inner surface of the connecting block 230 at equal intervals, (Not shown).

The lower surface of the steel pipe 210 and the upper surface of the connection block 230 are connected to each other in a state in which they are interlaced with each other. In the absence of the mounting table 253, the central axes in the longitudinal direction may be displaced in the process of connecting them.

However, in the fourth embodiment, the mounting block 253 is provided on the inner surface of the upper end of the connecting block 230. As shown in FIG. 9, the mounting block 253, which is in contact with the inner surface of the connecting block 230, And the mounting block 253 contacts the inner surface of the connecting block 230 and the inner surface of the steel pipe 210 so as to naturally coincide with the longitudinal center axis so that the steel pipe 210 and the connecting block 230 To facilitate the joining construction.

Also, the mounting table 253 attached to the inner surface of the steel pipe 210 and the connecting block 230 has an effect of reinforcing the bending moment and the transferring force caused by the lateral force of the back earth pressure.

The reinforcing means such as the reinforcing table 252 and the supporting table 220 and the height adjusting tube 240 are not fixed to the connection block 230 firmly A reinforcing rib 233 may be further provided.

The steel pipe 210 having the reinforcing support structure according to each of the embodiments of the present invention described above is inserted in place of the H-shaped steel after the perforation hole 20 using the casing is drilled, The concrete pipe C is installed in the steel pipe 210 to construct the thumb pile 200 having the CFT structure after the steel pipe 210 is blown to the steel pipe 210 by digging the slime 21 to be supported by the rock mass.

At this time, the concrete C placed in the steel pipe 210 passes through the concrete hole 221 on the surface of the slime 21 formed by the support stand 220, Which forms a fixed end 40 of the thumb pile 200 having a cantilever structure and is embedded in the concrete C in the steel pipe 210 together with the reinforcing means CIP earth retaining wall 10 So that it is possible to stably support the horizontal back-side earth pressure of the vehicle.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that it will be possible to carry out various modifications thereof. It is therefore intended that such modifications are within the scope of the invention as set forth in the claims.

10; CIP earth retaining wall 20; Perforated hole
21; Slime 40; Fixed end
100; CIP pile 200; Thumb pile
210; Steel pipe 220; support fixture
221; Concrete filling vacuum 231; Through-hole
232; An insertion protrusion 240; Height adjustment pipe
250; Ferry River and 251; Reinforced plate
252; A reinforcing bar 253; Installation
C; Concrete w1, w2; Weld

Claims (9)

A structure for reinforcing a steel pipe (210) to be inserted to form a thumb pile (200) having a CFT structure in a perforation hole (20) located between a plurality of continuous CIP piles (100) A plurality of support rods 220 are provided at a predetermined distance on the lower end of the support pipe 220 and the height h1 between the lower end of the steel pipe 210 and the support rods 220 is piled on the bottom surface of the perforation hole 20 A concrete filler hole 221 is formed between the lower end of the steel pipe 210 and the surface of the slime 21 so as to be larger than the height h2 of the slime 21,
The supporting block 220 is provided in a connecting block 230 having a through hole 231 formed therein so that the connecting block 230 is connected to the steel pipe 210 so that the supporting block 220 is connected to the lower end of the steel pipe 210 Respectively,
The connecting block 230 is provided with a height adjusting pipe 240 through which the supporting pipe 220 is inserted and the lower end of the steel pipe 210 and the supporting pipe 220 220) is set to a height (h1) between the tips of the CIP earth retaining walls.
delete delete The connector according to claim 1, wherein a reinforcing plate (251) inserted in contact with the inner surface of the steel pipe is protruded from the upper surface of the connecting block (230), and the projecting length of the reinforcing plate (251) (R) of the reinforcing steel pipe for the thumb pile of the CIP earth retaining wall.
The connector as claimed in claim 1, wherein the connection block (230) is provided with an insertion protrusion (232) on the upper surface thereof, and the insertion protrusion (232) Wherein the reinforcing support structure of the steel pipe for the thumb pile of the CIP earth retaining wall is inserted and fixed.
A reinforcing bar (252) inserted into a steel pipe (210) is fixed to an upper surface of the connecting block (230), and a length of the reinforcing bar (252) is determined by a bending moment and a reinforcing range R). The structure for reinforcing the steel pipe for the thumb pile of the CIP earth retaining wall.
delete The structure of claim 1, wherein the height control pipe (240) is provided with a weld (w2) for welding with a support stand (220).
delete
KR1020150112937A 2015-04-24 2015-08-11 Reinforcing structure of the steel pipe for the retaining CIP wall KR101618723B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102046965B1 (en) 2018-08-20 2019-11-20 토우산업 주식회사 Prestress beam
KR102237544B1 (en) 2020-09-02 2021-04-08 주식회사 더플러스이앤씨 A boring casing for boring hole construction of a peristyle type column structure and cut water off method using the same
KR20220139630A (en) 2021-04-08 2022-10-17 최동명 Cast in placed pile wall construction method
KR102470616B1 (en) 2021-05-26 2022-11-25 김청산 the improved CIP waterproof reinforcement structure
KR102497458B1 (en) 2021-11-10 2023-02-08 유정식 Cip Retaining Reinforcing Structure and Method Constructing the Same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001059219A (en) * 1999-06-17 2001-03-06 Sumitomo Metal Ind Ltd Bored precast pile
KR100549088B1 (en) * 2003-05-16 2006-02-10 김명률 Method for isolated footing type under-Reamed pile and the isolated footing type under-Reamed thereof
KR101011322B1 (en) * 2010-03-23 2011-01-28 최동섭 Tip open pile having reinforcing apparatus for buried pile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001059219A (en) * 1999-06-17 2001-03-06 Sumitomo Metal Ind Ltd Bored precast pile
KR100549088B1 (en) * 2003-05-16 2006-02-10 김명률 Method for isolated footing type under-Reamed pile and the isolated footing type under-Reamed thereof
KR101011322B1 (en) * 2010-03-23 2011-01-28 최동섭 Tip open pile having reinforcing apparatus for buried pile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102046965B1 (en) 2018-08-20 2019-11-20 토우산업 주식회사 Prestress beam
KR102237544B1 (en) 2020-09-02 2021-04-08 주식회사 더플러스이앤씨 A boring casing for boring hole construction of a peristyle type column structure and cut water off method using the same
KR20220139630A (en) 2021-04-08 2022-10-17 최동명 Cast in placed pile wall construction method
KR102470616B1 (en) 2021-05-26 2022-11-25 김청산 the improved CIP waterproof reinforcement structure
KR102497458B1 (en) 2021-11-10 2023-02-08 유정식 Cip Retaining Reinforcing Structure and Method Constructing the Same

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