KR101829812B1 - Micropile foundation system and construction method of micropile foundation - Google Patents
Micropile foundation system and construction method of micropile foundation Download PDFInfo
- Publication number
- KR101829812B1 KR101829812B1 KR1020150189265A KR20150189265A KR101829812B1 KR 101829812 B1 KR101829812 B1 KR 101829812B1 KR 1020150189265 A KR1020150189265 A KR 1020150189265A KR 20150189265 A KR20150189265 A KR 20150189265A KR 101829812 B1 KR101829812 B1 KR 101829812B1
- Authority
- KR
- South Korea
- Prior art keywords
- load
- ground
- unit
- fusing
- fixing
- Prior art date
Links
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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
-
- 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
- E02D5/72—Pile shoes
-
- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
- E02D5/808—Ground anchors anchored by using exclusively a bonding material
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention is to improve a conventional micro pile which uses a steel rod as a structural member and uses a casing to maintain a pneumatic wall, through which a load of a building is passed through a soft upper layer ground to a solid lower layer ground and supported.
In the present invention, a hollow fixing unit installed in a lower ground immediately after the perforation or at the time of perforation and transmitting the load transmitted through the transmission unit to the surrounding ground, and an upper end thereof is extended to be exposed above the ground surface, A transferring part having a diameter larger than an outer diameter of the fusing part and smaller than a diameter of the piercing hole so as to prevent the pneumatic wall from being collapsed, at least one of which is connected to the upper end of the fusing part, At least one flow path portion for allowing the dust ejected upward from the space outside the fusing unit, which is a space between the outside of the fusing unit and the air wall, to flow into the inside of the transfer unit by the air injected from the lower end of the fusing unit, A plurality of brackets joined to the inside or outside of the upper end of the transmission portion, And at least one load plate which is provided at the outer periphery of the transfer part and which protrudes outwardly from the outer diameter of the transfer part. The lower part of the material forming the opening to prevent the upper end of the transfer part from being sealed, And a bottom portion of the reinforced concrete material formed so as to be embedded in the load portion, the load of the upper building is transmitted to and supported by the lower portion of the material integrated with the base portion and the solid bottom portion around the fusing portion, Based system and a microfile foundation.
Description
The present invention relates to a small-diameter foundation generally referred to as a micro-pile, in which a soft ground is drilled, a steel rod is installed therein, and an injection material commonly referred to as a grout solution is injected to secure the load of the structure transmitted through the steel rod To the lower ground.
The present invention is directed to a small diameter base, commonly referred to as a microfile. A structure in which a weak ground is drilled and a steel rod is installed therein and an injection material such as mortar is injected and the load of the structure transmitted through the steel rod is transmitted to the ground under the solid material through the injection material.
For such conventional microfiles, the construction process is described in Korean Patent No. 10-0666678 and No. 10-0956879.
No. 10-0666678 'A micro pile having a leading end round plate' is a technique for increasing a leading end holding force by adding a leading end round plate to a conventional micro pile, and No. 10-0956879 'Stress distribution type micro pile' Is a technology that maximizes frictional force by introducing a stress dispersion flange into a micro-file.
According to the above two prior art techniques, a conventional micro-pile inserts a steel rod through a weak stratum to a solid support layer, the steel rod being designated as a "sicteba" or "tread bar", and injecting the injection material specified as a "grouting solution" In order to secure the steel rod insertion space in the fragile stratum, the 'casing' is preformed before penetrating the inside of the casing to the hard support layer. That is, in order to secure a space for installing the steel rods, the 'casing' is hammered into the soft ground, penetrating the inside of the casing, and drilling the rigid supporting layer by a certain length. Since the building load is transmitted to the solid supporting layer through the steel rods, the casing used to prevent the collapse of the pneumatic wall of the ground during the construction is left in the ground without any function after completion of the construction.
In the present invention, a steel rod is used as a structural member that transmits load, and a casing is designed to replace a conventional micro pile used for preventing collapse of a pore wall of a soft ground during construction. And to carry out the function of keeping the weak ground in the ground. Therefore, after the completion of the construction, a casing having no function is not required, so that the amount of steel material used can be reduced.
In order to achieve the above object, the present invention provides a micro pile foundation system that penetrates a soft upper pile foundation (10) to transmit and support a load of the pile foundation to a lower pile foundation foundation (20) A
In this case, the joining portion is composed of a plurality of
And at least one plate-like joining means (61b) joined to the upper end of the fixing unit so that the outside of the joining portion is bonded to the lower end of the transmitting portion so as not to protrude outside the inside diameter of the fixing portion, , The
The joining portion is composed of plate-like joining means (61c) which is joined to the lower end of the transmitting portion but does not protrude outside the diameter of the transmitting portion, and the inner side thereof is joined to the fixing portion and does not protrude to the inside of the fixing portion. The flow path portion can be formed of a through hole (63) provided so as to pass through the inside and the outside of the fusing portion.
It is preferable that a base portion is formed such that a portion of the
Also, the
The soft
The perforation is formed by a
The perforation is perforated to a diameter larger than the outer diameter of the
In the sixth step, the
The present invention can reduce the amount of steel used because it does not require a casing, which serves as a passage, by using a hollow structural member without using a steel bar serving as a structural member in a conventional microfiber. In a typical stratification structure in Korea, about 50% of steel can be saved, which can contribute to economical efficiency.
1 is a block diagram of a microfilm main constitution
Figure 2 is a cross-
Figure 3 shows a cross-
FIG. 4 is a block diagram of the microfiles
FIG. 5 is a diagram showing a punching example using a ring bit and a core bit
FIG. 6 is a flowchart illustrating a puncturing example using recoverable bits
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Figure 1 shows the main configuration of the microfill foundation system of the present invention in which the main components are installed and penetrated through the soft
The micro pile foundation system of the present invention is intended to support the load of the building through the soft
The load of the upper building is transmitted to the
The
In order to smoothly perform the slime discharging operation, some dust or stone powder remaining in the fixing space
The
The
The microfibre foundation system of the present invention has a structure in which the load of the upper building is embedded in the
The
3A shows an embodiment of the
3C shows another embodiment of the joining
FIG. 3D shows another embodiment of the joining portion and the flow path portion. The joining portion of the joining portion is joined to the lower end of the transmitting portion and does not protrude outside the punching hole. The inner side of the joining portion is coupled to the fixing portion, And a joining means 61c in the form of a plate that does not protrude, so that the load of the transmitting
4, a portion of the reinforcing
1, the
The microfiber basic manufacturing method of the present invention will be described step by step.
A first step of perforating the soft upper layer ground 10 and the harder lower layer ground 20 to a predetermined diameter, a second step of installing a hollow fixing part 50 having an outer diameter smaller than the pore size in the perforated ground, The lower end of which is joined to the joint portion joined to the upper end of the fixing portion 50 and the upper end thereof is exposed on the surface of the earth, the outer diameter of which is larger than the outer diameter of the fixing portion, A fourth step of attaching a load part composed of a plurality of brackets and at least one load plate to the upper end of the transfer part, and a fourth step of blowing air to the lower end of the fixing part installed on the lower part ground 20, A fifth step of discharging the dust in the fixing unit outer space 51 as a space between the fixing unit and the transfer unit, and a sixth step of injecting the injection material 82 into the fixing unit and the fixing unit outer space 51, (30) is embedded in the reinforcing concrete And a seventh step of forming a base part 70 of the material so that the load of the upper building is fixed to the rigid part around the fixing part 50 through the lower part 30 integrated with the base part 70 and the transmission part 40 To the lower layer ground (20) so as to support the microfiber foundation.
The first step is the step of drilling the ground, the second step is the step of inserting the fixing
The first type is generally referred to as 'post-perforation insertion'. When the perforated wall is not completely collapsed when perforating the soft
The second step and the third step are performed after the first step is completed and the fusing
The second embodiment is applied to a case in which it is difficult to insert the fusing
5, the perforation includes a
6, the
In the case of a microfile using an existing casing, since a plurality of microfiles are usually drilled and the steel rods are inserted and air holes are maintained for a substantial period of time until the injection material is injected into a plurality of holes, And the inside thereof was punctured to prevent the air wall from collapsing. However, in the case of the present invention, since both the
The fourth step is a step of joining the
The fifth step is a step of blowing air until the dust does not protrude to the surface of the ground, which is usually called air surging, to clean the perforated space. After the second step of installing the fusing
The sixth step is a step of injecting the
In the seventh step, it is preferable that the
The microfile foundation can be effectively fabricated through these seven steps, and it is possible to determine the successive relationship of each step or the repetition of each step according to the intention of the designer or the field conditions.
In the sixth step, the
The above process does not include the step of providing the
Through the above process, it is possible to manufacture a micro pile foundation through which the load of the upper building is transmitted through the soft upper layer ground to the solid bottom layer ground.
Since the amount of steel material used in the existing microfiles can be reduced by utilizing the microfiber basic system and the microfiber basic manufacturing method of the present invention, the stiffness of the structural member becomes larger than that of the conventional steel bar, There is no problem such that the structural member is bent to a certain extent before the injection, and more reliable construction is possible.
10: upper layer ground 11:
20: lower ground 21:
30: ash lower 31: load plate
32: opening 33: bracket
40:
50:
51: outer side space of the fixing unit 52:
60:
61a: joining means
61b:
61c: joining means
62a: channel portion (embodiment formed between bonding means)
62b: channel portion (embodiment formed between bonding means)
62c: channel portion (embodiment provided in the joining means)
63: Through hole
64: Through-hole stiffener
70:
71: Reinforcement 72: Concrete
81: injection tube 82: injection material
83: Packer
85: core bit 86: ring bit
87:
90: Recoverable bit
91: Wing bit 92: Hinge pin
93: connecting means 94: fixing pin
95: latching jaw 99: bit housing
Claims (10)
A hollow fixing unit installed in the lower ground immediately after the perforation of the ground or at the same time as the perforation and transmitting the load transmitted through the transmission unit to the surrounding ground;
The upper end of which is extended to be exposed above the surface of the ground and has an outer diameter larger than the outer diameter of the fusing part and smaller than the perforation diameter so as to prevent the air wall from falling down,
A joining portion including at least one joining means having one side joined to the upper end of the fixing portion and the other side joined to the lower end of the transmitting portion;
At least one flow path portion for allowing the dust ejected upward from the space outside the fusing unit, which is a space between the outside of the fusing unit and the air wall, through the air injected from the lower end of the fusing unit to move into the interior of the transfer unit;
A plurality of brackets joined to the inner or outer side of the upper end of the transmission part and at least one load plate provided on the bracket and protruding outward from the outer diameter of the transmission part,
An injection material filling the space inside the perforated wall to integrate the fusing part and the surrounding ground;
And a base portion of a reinforced concrete material formed to be embedded in the load portion,
And a ring shank having an outer diameter larger than an inner diameter of the shoe so that the ring bit is pierced while pulling the shoe,
Wherein the load of the upper structure is transferred to and supported by a lower portion of the lower portion integrated with the lower portion and a lower portion of the lower portion around the fixing portion through the transmission portion.
Wherein the connecting portion is composed of a plurality of connecting means which are coupled to the lower end of the transmitting portion and whose inner side is coupled to the upper outer side of the upper end of the fixing portion,
The joining portion is composed of at least one plate-shaped joining means joined to the upper end of the fixing portion so that the outside of the joining portion is joined to the lower end of the transmitting portion so as not to protrude outside the fanning portion, Characterized in that a flow path portion is formed between the means or the joining means
The joining portion is composed of a joining means in the form of a plate which is joined to the lower end of the transmitting portion but does not protrude outside the punching hole and the inner side thereof is joined to the fixing portion and does not protrude into the inner diameter of the fixing portion,
Wherein the flow path portion includes a through hole provided to penetrate the inside and the outside of the fusing unit.
Wherein a base portion is formed such that a portion of the reinforcing bars of the base portion is disposed below the load plate and the remaining portion is disposed above the load plate.
Characterized in that an injection tube for transferring the injection material is inserted into the transfer part, the upper part of the transfer part is sealed, and the injection material is pressed and injected.
A first step of perforating the soft upper layer ground and the solid lower layer ground to a predetermined diameter;
A second step of installing a hollow fixing part having an outer diameter smaller than the pore size in a perforated ground;
A third step of joining a lower end of the fixing part to a joining part bonded to the upper end of the fixing part and having an upper end thereof exposed on the surface of the ground and having an outer diameter larger than the outer diameter of the fixing part and smaller than or equal to the pile diameter;
A fourth step of joining a load part composed of a plurality of brackets and at least one load plate to the upper end of the transmission part;
A fifth step of blowing air to the lower end of the fixing unit installed on the lower layer ground to discharge the dust in the space outside the fixing unit, which is a space between the outer surface of the fixing unit, and the air wall, to the outside;
A sixth step of injecting an injection material into the fixing unit, the interior of the transfer unit, and the space outside the fixing unit;
And a seventh step of forming a base portion of the reinforcing concrete material so that the reinforcing portion is embedded in the reinforcing concrete portion
The load of the upper structure is transferred to and supported by the lower portion of the material integrated with the base portion and the lower portion of the solidified portion around the fusing portion through the transfer portion,
The puncturing is performed by pulling the end shoe coupled to the tip of the fusing unit at the same time of puncture by a ring bit punctured to a diameter larger than the outer diameter of the fusing unit and an outer diameter larger than the inner diameter of the tip shoe, A core bit which is separated and enters the inside of the shoe so as to be recovered is used, or the wing bit is pierced by a larger diameter than the outer diameter of the fusing part, and at the same time as the perforation by the engaging jaw having an outer diameter larger than the inner diameter of the tip shoe, And the bit housing is retracted to return the wing bit to the inside of the tip shoe while rotating around the hinge pin, and using the recoverable bit that can be recovered, the first step, the second step, And three steps are simultaneously performed.
Wherein the sixth step is performed by inserting the injection tube into the transfer part and installing a packer for closing the inside of the upper part of the transfer part and pressing the injection material
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150189265A KR101829812B1 (en) | 2015-12-30 | 2015-12-30 | Micropile foundation system and construction method of micropile foundation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150189265A KR101829812B1 (en) | 2015-12-30 | 2015-12-30 | Micropile foundation system and construction method of micropile foundation |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170079083A KR20170079083A (en) | 2017-07-10 |
KR101829812B1 true KR101829812B1 (en) | 2018-02-20 |
Family
ID=59355172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020150189265A KR101829812B1 (en) | 2015-12-30 | 2015-12-30 | Micropile foundation system and construction method of micropile foundation |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101829812B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101147510B1 (en) * | 2011-08-18 | 2012-05-21 | 백규호 | Complex pile with improved end bearing capacity and piling method of complex pile using the same |
JP2012102559A (en) * | 2010-11-11 | 2012-05-31 | Kiso Engineering Kk | Method for removing existing pile |
KR101413593B1 (en) * | 2013-04-15 | 2014-07-04 | 이강수 | Composite pile with end bearing capacity, friction capacity and construction method therefor |
-
2015
- 2015-12-30 KR KR1020150189265A patent/KR101829812B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012102559A (en) * | 2010-11-11 | 2012-05-31 | Kiso Engineering Kk | Method for removing existing pile |
KR101147510B1 (en) * | 2011-08-18 | 2012-05-21 | 백규호 | Complex pile with improved end bearing capacity and piling method of complex pile using the same |
KR101413593B1 (en) * | 2013-04-15 | 2014-07-04 | 이강수 | Composite pile with end bearing capacity, friction capacity and construction method therefor |
Also Published As
Publication number | Publication date |
---|---|
KR20170079083A (en) | 2017-07-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100776304B1 (en) | Direct punching simultaneous poruing equipment and grouting construction method | |
KR101665515B1 (en) | Direct-boring pipe roof tunnel construction method and structure non-cutting natural ground | |
KR101582068B1 (en) | Ground anchor construction method for anchoring area extended improvement using extended excavation agitator | |
KR101276572B1 (en) | Pressurizing grouting type soil nailing and method for reinforcing slope using thereof | |
KR102669178B1 (en) | Connection apparatus of steel pipe to ring bit, reinforcement apparatus of direct boring and it's installation method | |
JP2015117462A (en) | Pinning method | |
KR100963682B1 (en) | Anchor assembly, method for reinforcing slope using anchor assembly | |
KR101633505B1 (en) | The support material | |
KR101236765B1 (en) | Method for placing adhesive filling into the expanded drill hole to increase bearing capacity of piles and tention members and apparatus therefor | |
KR100616359B1 (en) | Support-pipe using method of soil nailing | |
KR101871118B1 (en) | Pile head reinforcement structure using drilling bit capable of multistage expansion using unwelded coupler and pile construction method using it | |
JP5401182B2 (en) | How to install inflatable rock bolts | |
KR101087891B1 (en) | High Strength Light Soil Nail Having Multi Folder Wedges Fixed Borehole Which Expanded Packer | |
KR101829812B1 (en) | Micropile foundation system and construction method of micropile foundation | |
KR200410783Y1 (en) | Pressured multi-step grouting structure | |
KR101499341B1 (en) | Micro-pile using hollow bar and method for constructing the same | |
KR102011365B1 (en) | Packer module for soil nail and method for pressed grouting and constructing concrete panel using the same | |
KR101834948B1 (en) | Steel pipe micro-pile foundation system and construction method of micropile foundation using the same | |
KR101819008B1 (en) | Micropile foundation structure and construction method of micropile foundation | |
KR100991248B1 (en) | Foundation construction method of micro pile using pack and pile used in the same | |
KR101110274B1 (en) | Calking assembly for recycling and tunnel reinforcement method using it | |
KR101682463B1 (en) | Soil-nailing structure with a pipe-type tube and method constructing direct boring/CFT thereof | |
KR100731815B1 (en) | Pressured multi-step grouting method and structure thereof | |
JP2011021401A (en) | Self-drilling anchor and earth and sand ground reinforcement method using the same | |
KR101175741B1 (en) | Double grouting injection module and earth reinforcing method using the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
N231 | Notification of change of applicant | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant |