KR101869706B1 - Micro pile improved construct ability and support power - Google Patents
Micro pile improved construct ability and support power Download PDFInfo
- Publication number
- KR101869706B1 KR101869706B1 KR1020170158441A KR20170158441A KR101869706B1 KR 101869706 B1 KR101869706 B1 KR 101869706B1 KR 1020170158441 A KR1020170158441 A KR 1020170158441A KR 20170158441 A KR20170158441 A KR 20170158441A KR 101869706 B1 KR101869706 B1 KR 101869706B1
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- KR
- South Korea
- Prior art keywords
- file
- outer diameter
- screw portion
- pile
- circular pipe
- Prior art date
Links
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000008267 milk Substances 0.000 claims abstract description 19
- 210000004080 milk Anatomy 0.000 claims abstract description 19
- 235000013336 milk Nutrition 0.000 claims abstract description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 32
- 239000010959 steel Substances 0.000 abstract description 32
- 238000010276 construction Methods 0.000 abstract description 18
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 229920001410 Microfiber Polymers 0.000 description 6
- 239000003658 microfiber Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000011513 prestressed concrete Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
-
- 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
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1671—Shapes helical or spiral
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
Landscapes
- 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
The present invention relates to a small-sized steel pipe micro-pile having improved workability and bearing capacity, which can improve the bearing capacity of the ground and can be combined without using a separate coupler and lock bolt, thereby shortening the construction period and reducing the cost The whole file can be lightened by using circular pipe without using steel bar, so it can be handled without using equipments. Cement milk grouting can be done without additional hose, and workability is improved. .
Description
The present invention relates to a small-sized steel pipe micro-pile having improved workability and bearing capacity among technologies of the ground reinforcement field. More specifically, it is possible to improve the supporting force against the ground and the supporting force against the pulling force, It is possible to shorten the construction period and reduce the cost because it can be combined without using steel rods. By using round pipes without using steel rods, the entire file can be made lightweight so that it can be handled without using equipment. The present invention relates to a small-sized steel pipe microfabricated with improved workability and bearing capacity that enables cement milk croaking without introducing a hose.
PC (Prestressed Concrete) files have been widely used to reinforce foundation structures in the construction of foundations for known structures of buildings or loads of civil engineering structures.
PHC files (Pretensioned Spin High Strength Concrete Piles), helical piles, and micro piles have been put to practical use in order to overcome the shortcomings of the conventional PC files.
Conventionally, a PHC file is made up of a concrete structure, and has a PC steel bar embedded in the center portion, a joint plate and a reinforcement band between the upper file and the central file, in which the helical wire is embedded, And an outer diameter of 400 mm to 600 mm is used.
The helical file includes a shaft having a hollow pipe shape and helical blades welded to the outer circumferential surface of the shaft. The shaft has an outer diameter x a wall thickness of 88.9 mm x 11.0 mm and a diameter of 114.3 mm x 9.0 mm, The wings have outer diameters of 240 mm, 270 mm and 300 mm.
When the PHC file is compared with the helical file, the PHC file has an allowable history per file nip of 90 kN / EA to 1800 kN / EA when the outer diameter is 400 mm to 600 mm,
Helical file has 600kN / EA for shaft outer diameter x wall thickness of 88.9mm x 11.0mm and 700kN / EA for 114.3mm x 9.0mm.
Therefore, the PHC file has a greater bearing capacity and strength than the helical file, which is advantageous in the case of a building having a high-rise structure and a large-sized civil structure, In addition, the impact method and the indentation method are applied to the construction of the hitting method and the file by the press-in method. The hitting method and the indentation method have disadvantages such as safety problems due to noise and vibration, and environmental problems .
The helical file has the disadvantage that the bearing capacity and the bearing capacity are lower than that of the PHC file. However, the helical file does not use large equipment such as an auger drill machine, And it is possible to solve safety problems and environmental problems due to noise and vibration at the time of construction.
Helical file is also advantageous in construction such as downtown, where construction sites are narrow, noise-sensitive places, and towing power (power acting in the direction of extraction).
The micro pile is a method to form a friction pile by piercing the ground with a crawler drill equipment, inserting a thread bar into the piercing hole, and injecting cement milk.
Micro-file is a small-diameter file construction method, and it is advantageous that it can be constructed with small equipment and small-sized buildings with narrow and low height.
However, since the microfiles of the prior art are composed of threads having a certain diameter, there is a disadvantage that the supporting force against the ground is not sufficiently satisfied.
Conventional microfiles consist of steel bars with diameters of 50 mm, 65 mm and 70 mm, respectively, and have a holding capacity and pull force per pile of 500 kN / EA, 700 kN / EA and 1000 kN / EA, respectively.
In addition, a steel bar having a diameter of 50 mm and a length of 3 m is 46 kg, a diameter of 65 mm and a length of 3 m is 78 kg, a diameter of 75 mm and a length of 3 m is 104 kg, There is a problem that the construction is troublesome because equipment such as a crane or a backhoe has to be additionally used.
Also, depending on the depth of the penetration, a plurality of thread bars are connected and installed. In this case, since a plurality of thread bars are connected by a coupler, the construction time is delayed and the cost increases.
In addition, since the conventional microfibers are formed of steel bars, the hoses need to be introduced together with the steel rods for cement milk grouting, which reduces the workability.
As a prior art related to conventional microfiles, Korean Patent Registration No. 10-0666678 (Mar. 3, 2007) entitled " Microfilter having a leading end supporting round plate "(hereinafter referred to as " prior art ") is known.
The prior art is provided with a tip support round plate at the lower end of the seat bar to increase the supporting force, to be connected to a plurality of couplers for connection, and to provide a lock bolt for reinforcing the coupler, And the like.
However, although the prior art has an advantage that the supporting force is increased by the leading end round plate, the seat cushion is made of a steel bar, connected by a coupler and improved in straightness by a lock bolt, The problem of the microfiles of the prior art remains as it is so heavy that it can not be handled by manpower.
In addition, since the sitec bar is made of a steel rod, it is necessary to insert the hose into a separate hole at the same time of inserting the micro pile during the construction for cement milk grouting.
Therefore, it is possible to improve the bearing capacity to the ground and to combine without using a separate coupler and lock bolt, thereby shortening the construction period and reducing the cost. By using a circular pipe without using a steel bar, It is required to develop a technique that makes it possible to treat the whole body as a man power without using equipment and to enable cement milk grouting without introducing a separate hose.
Therefore, it is an object of the present invention to improve the supporting force against the ground and the supporting force against the pulling force, and to be able to combine without using a separate coupler and lock bolt, thereby shortening the construction time and cost, It is possible to treat the whole file as lighter without using the equipment and to improve the workability and the bearing capacity to enable the cement milk crouting even without introducing a separate hose. It is intended to provide a small steel pipe microfilm.
According to an aspect of the present invention, A lower end file coupled to an upper surface of the lower support disk; An upper file detachably coupled to the upper end of the lower file; And a file cap detachably coupled to an upper end of the upper file, wherein the lower file comprises a circular pipe having an outer diameter smaller than an outer diameter of the lower end supporting disk, and is fixedly coupled to an upper surface of the lower end supporting disk A first bottom file; A second lower end file formed of a circular pipe having an outer diameter and an inner diameter smaller than the outer diameter and the inner diameter of the first lower end file and detachably coupled to the upper end of the first lower end file; A third lower file detachably connected to the upper end of the second lower end file, the third lower end file being composed of a circular pipe having an outer diameter and an inner diameter smaller than an outer diameter and an inner diameter of the second lower end file; And a fourth lower file detachably coupled to the upper end of the third lower end file, the fourth lower end file being composed of a circular pipe having an outer diameter and an inner diameter smaller than the outer diameter and the inner diameter of the third lower end file, The upper end of the disk and the lower end of the first lower end pile are joined by welding. The first lower end pile has a first female threaded portion formed at the upper end. The second lower end pile is formed at the lower end, Wherein the third lower end pile has a male screw portion formed at the lower end and screwed to the female screw portion and a female screw portion formed at the upper end, and the fourth lower end pile is formed at the lower end And a female thread portion formed at an upper end of the female thread portion, wherein the first lower end pile includes a cement milk main body formed at the lower end of the main wall, Wherein the upper file comprises a circular pipe formed on an outer circumferential surface of the male screw portion of the third lower file to extend over the entire outer circumferential surface thereof and the file cap is fastened to the upper end of the male screw portion of the upper file A cylindrical portion having a female thread portion and an upper finish plate coupled to an upper end of the cylindrical portion; and a small steel pipe microfiber having improved workability and bearing capacity.
According to the present invention, there is provided a compact steel pipe microfabrication improved in workability and supporting force, A lower end file coupled to an upper surface of the lower support disk; An upper file detachably coupled to the upper end of the lower file; And a file cap detachably coupled to an upper end of the upper file, wherein the lower end file includes a first lower end file made of a circular pipe having an outer diameter smaller than that of the lower end support disk, A third bottom file having a circular pipe having an outer diameter smaller than that of the second bottom file and a fourth bottom file having an outer diameter smaller than that of the third bottom file, And the lower file and upper file can be combined without using separate coupler and lock bolt to shorten the construction period and reduce the cost, and the lower file and the upper file By using a round pipe without using a steel rod, the entire file can be lightened, so that it can be handled without using equipment. do.
FIGS. 1 to 3 show a first embodiment of a small-sized steel pipe microfiber according to the present invention having improved workability and supporting force,
1 is a perspective view,
2 is a partially cut exploded perspective view,
Fig. 3 is a longitudinal sectional view showing the construction,
FIGS. 4 to 6 show a second preferred embodiment of a small-sized steel pipe microfabricated in accordance with the present invention having improved workability and supporting force,
4 is a perspective view,
5 is a partial cutaway exploded perspective view,
6 is a longitudinal sectional view showing the construction.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a compact steel pipe microfabricated in accordance with the present invention with improved workability and bearing capacity will be described in detail with reference to the preferred embodiments illustrated in the accompanying drawings.
1 to 3 show a first preferred embodiment of a small-sized steel pipe microfiber according to the present invention having improved workability and supporting force.
As shown in FIGS. 1 to 3, the small-sized steel pipe micro-pile according to the present embodiment has improved workability and supporting force. A lower end (200) coupled to an upper surface of the lower support disc (100); An
The lower supporting
The
The upper surface of the lower supporting
The first
The second
The third
The fourth
The first
The
The
The lower supporting
The
That is, the total length of the first
The microfiles are applied to the construction of a small scale building with a small height, and it is not uncommon if the depth of penetration exceeds 4 m. If necessary, the length of the
The
The small-sized steel pipe microfiles having improved workability and bearing capacity according to the present embodiment thus configured are manufactured by welding the lower end of the first
The
As in the prior art, the ground is pierced by a crawler drill rig.
At this time, the inner diameter of the perforation hole H is formed so as to have an inner diameter larger than the outer diameter of the
The bottom of the lower supporting
Since the lower and
When the insertion of the micro pile into the perforation hole H is completed, the cement milk M is injected through the top opening of the
The injected cement milk M is filled in the
Therefore, as in the prior art, the cement milk (M) can be injected into the micro pile itself without introducing a separate hose into the perforation hole (H), so that the workability can be further improved.
At this time, the
Since the
The first
In addition, not only the lower supporting
When the injection of the cement milk M is completed, the
The
FIGS. 4 to 6 show a second preferred embodiment of a small-sized steel pipe microfiber according to the present invention with improved workability and bearing capacity.
In the present embodiment, a plurality of supporting
The supporting
Since the support
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 or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.
100: Lower support disc 200: Lower file
210: first lower file 220: second lower file
230: third bottom file 240: fourth bottom file
211, 222, 232, 242: female thread portion
221, 231, 241: Male thread portion 250: Support force reinforcing projection
300: top file 310: male threads
400: File cap 410: Cylinder part
411: Female thread portion 420: Upper finish plate
Claims (1)
The lower supporting disk 100 is composed of an outer diameter corresponding to the inner diameter of the perforation hole H formed in the ground,
The lower file 200 includes a first lower end 210 formed of a circular pipe having an outer diameter smaller than the outer diameter of the lower support disc 100 and fixedly coupled to the upper surface of the lower support disc 100; A second lower end file 220 composed of a circular pipe having an outer diameter and an inner diameter smaller than the outer diameter and the inner diameter of the first lower end file 210 and detachably coupled to the upper end of the first lower end file 210; A third lower side file 230 formed of a circular pipe having an outer diameter and an inner diameter smaller than the outer diameter and the inner diameter of the second lower side file 220 and detachably coupled to the upper end of the second lower side file 220; And a fourth bottom plate 240 formed of a circular pipe having an outer diameter and an inner diameter smaller than the outer diameter and the inner diameter of the third lower end file 230 and detachably coupled to the upper end of the third lower end file 230; And,
The upper file 300 is formed of a circular pipe having an outer diameter smaller than the outer diameter of the fourth lower file 240,
Between the upper end of the lower supporting disk 100 and the lower end of the first lower end file 210,
Between the upper end of the first lower end file 210 and the lower end of the second lower end file 220,
Between the upper end of the second lower end file 220 and the lower end of the third lower end file 230,
Between the upper end of the third lower end file 230 and the lower end of the fourth lower end file 240,
A locking protrusion is formed between the upper end of the fourth lower side file 240 and the lower end of the upper side file 300,
The upper surface of the lower supporting disk 100 and the lower end of the first lower end file 210 are coupled by welding,
The first lower side file 210 has a first female thread 211 formed at an upper end thereof,
The second lower side file 220 includes a male screw portion 221 formed at the lower end and screwed to the female screw portion 211 and a female screw portion 222 formed at the upper end,
The third lower side file 230 includes a male screw portion 231 formed at the lower end and screwed to the female screw portion 222 and a female screw portion 232 formed at the upper end,
The fourth lower end portion 240 includes a male screw portion 241 formed at a lower end thereof and fastened to the female screw portion 232 and a female screw portion 242 formed at an upper end thereof,
The first lower end 210 has a cement milk injection hole 212 formed at the lower end of the main wall,
And a plurality of supporting force reinforcing protrusions 250 for reinforcing the supporting force of the file against the ground and the supporting force of the pulling force on the outer circumferential surface of the fourth lower side file 240,
The upper file 300 includes a circular pipe formed on an outer circumferential surface thereof and having a male screw portion 310 fastened to the female screw portion 232 of the third lower side file 230,
The pile cap 400 includes a cylindrical portion 410 having a female threaded portion 411 fastened to the upper end of the male threaded portion 310 of the upper pile 300, And a finishing plate (420). ≪ RTI ID = 0.0 > 31. < / RTI >
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170158441A KR101869706B1 (en) | 2017-11-24 | 2017-11-24 | Micro pile improved construct ability and support power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170158441A KR101869706B1 (en) | 2017-11-24 | 2017-11-24 | Micro pile improved construct ability and support power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101869706B1 true KR101869706B1 (en) | 2018-06-21 |
Family
ID=62806578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020170158441A KR101869706B1 (en) | 2017-11-24 | 2017-11-24 | Micro pile improved construct ability and support power |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101869706B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100666678B1 (en) | 2004-10-29 | 2007-01-19 | 지앤에스건설 주식회사 | Micro-pile having a end supporting round-plate |
| KR200462047Y1 (en) * | 2012-03-02 | 2012-08-22 | 오환상 | Micro pile used reinforcing bar |
| KR20140132996A (en) * | 2013-05-09 | 2014-11-19 | 김한겸 | Injection and grouting grouting solution construction method |
| KR20160109032A (en) * | 2015-03-09 | 2016-09-21 | 주식회사 건화 | Earth Anchor |
-
2017
- 2017-11-24 KR KR1020170158441A patent/KR101869706B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100666678B1 (en) | 2004-10-29 | 2007-01-19 | 지앤에스건설 주식회사 | Micro-pile having a end supporting round-plate |
| KR200462047Y1 (en) * | 2012-03-02 | 2012-08-22 | 오환상 | Micro pile used reinforcing bar |
| KR20140132996A (en) * | 2013-05-09 | 2014-11-19 | 김한겸 | Injection and grouting grouting solution construction method |
| KR20160109032A (en) * | 2015-03-09 | 2016-09-21 | 주식회사 건화 | Earth Anchor |
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