KR20160130539A - Drilling and mixing apparatus using single rod for improving soft ground - Google Patents

Drilling and mixing apparatus using single rod for improving soft ground Download PDF

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Publication number
KR20160130539A
KR20160130539A KR1020150062409A KR20150062409A KR20160130539A KR 20160130539 A KR20160130539 A KR 20160130539A KR 1020150062409 A KR1020150062409 A KR 1020150062409A KR 20150062409 A KR20150062409 A KR 20150062409A KR 20160130539 A KR20160130539 A KR 20160130539A
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KR
South Korea
Prior art keywords
stirring
frame
soft ground
stirring frame
rod
Prior art date
Application number
KR1020150062409A
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Korean (ko)
Inventor
노승관
Original Assignee
노승관
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Application filed by 노승관 filed Critical 노승관
Priority to KR1020150062409A priority Critical patent/KR20160130539A/en
Priority to SG10201508499WA priority patent/SG10201508499WA/en
Publication of KR20160130539A publication Critical patent/KR20160130539A/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/123—Consolidating by placing solidifying or pore-filling substances in the soil and compacting the soil
    • 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
    • E02D2300/00—Materials
    • E02D2300/0004—Synthetics
    • E02D2300/0006—Plastics
    • E02D2300/0015—HDPE

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The present invention relates to a monoaxial piercing stirrer for soft ground reinforcement for reinforcing a soft ground by excavating a soft ground and injecting a solidifying agent such as cement into a soft ground to cure.
More particularly, the present invention relates to a monoaxial piercing stirrer for modifying a soft ground in which a solidifying agent and a soft ground are mixed well, because only the stirring blades are rotated in a state where the stirring frame is fixed when rotating with a stirring rod.

Description

Technical Field [0001] The present invention relates to a drilling and mixing apparatus using a single shaft for improving soft ground,

The present invention relates to a monoaxial piercing stirrer for soft ground reinforcement for reinforcing a soft ground by excavating a soft ground and injecting a solidifying agent such as cement into a soft ground to cure.

More particularly, the present invention relates to a monoaxial piercing stirrer for modifying a soft ground in which a solidifying agent and a soft ground are mixed well, because only the stirring blades are rotated in a state where the stirring frame is fixed when rotating with a stirring rod.

Generally, as a countermeasure against settlement and lack of bearing capacity of soft ground, the hardening method, which is one of the methods used for improving the soil and constructing the vertical wall, adds the hardenable material to the soil particles and mixes them.

As a method of mixing the hardenable material into the soil particles, usually a 'solidifying agent' such as lime or cement is used. Typical examples include a shallow mixing method and a deep mixing method.

As shown in FIG. 1, the above mixing treatment method includes (1) excavation, (2) drawing after completion of excavation, (3) re-descent and cement injection, (4) re-acceleration and cement injection, Curing step and the like.

As shown in FIG. 2, the auger machine used in the mixing processing method is a method in which the agitating rod 120 with the perforated bit 150 is rotated to excite and / or pull the ground, and the solidifying agent is injected through the outlet 160 do.

In addition, a plurality of agitating blades including a main stirring blade 140 and an upper stirring blade 180 are used to mix the injected solidifying agent, that is, the cement and the soil particles of the soft ground, and the mixture is cured to improve the ground.

However, since the main agitation blade 140 and the upper agitation blade 180 are integrally fixed to the agitation rod 120, the main agitation blade 140 and the upper agitation blade 180 together Rotate.

Therefore, when the stirring rod 120 rotates, the cement mixture located between the main stirring blades 140 and the upper stirring blades 180 rotates together with the stirring blades 140 and 180 so that the blending ratio is very low .

Also, when the grouting cement and the ground particles are not mixed, there is a phenomenon that the backflow occurs to the upper part, and the quality is lowered. In order to compensate the problem, more cement is injected or more mixing time is required.

Furthermore, in order to solve the above problems, there has been proposed a multi-shaft stirring rod system in which two to four stirring rods are arranged side by side and each of the stirring blades is staggered, but in this case, equipment is expensive and maintenance is very difficult.

Korean Patent Laid-Open Publication No. 2015-0029152 'High-pressure spray type perforated stirring bit for hard ground improvement' Korean Patent No. 10-1097359 entitled " Deep-mixed treatment method for strengthening soft ground &

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a monoaxial piercing stirrer for soft ground reinforcement for reinforcing a soft ground by injecting a solidifying agent into a soft ground with a uniaxial stirring rod.

Also, the present invention is to provide a uniaxial punch stirring apparatus for improving soft ground in which a solidifying agent and soft ground are mixed well, because only a stirring blade is rotated in a state where the stirring frame is fixed when rotating with a stirring rod.

To this end, the uniaxial piercing stirrer for soft ground improvement according to the present invention comprises: a stirring rod having a spray hole for spraying a solidifying agent on one side and an auger for excavation on the lower side; A stirring blade extending outwardly from the stirring rod and rotated together with the stirring rod; A connecting hole through which the stirring rod is inserted into the hollow portion and which is rotatably coupled to the outer circumferential surface of the stirring rod; And a stirring frame extending outwardly from the connection port to maintain a fixed state without rotating even if the stirring rod rotates, wherein when the stirring rod of the stirring rod is fixed while the stirring frame is fixed, And the solidifying agent injected through the injection hole is mixed.

At this time, it is preferable that the stirring frame is formed longer than the stirring vane, and the stirring frame has a length in which the end portion is inserted into the soft ground through the hole where the soft ground is drilled.

In addition, it is preferable that a plurality of the stirring frames are provided, and the plurality of stirring frames are radially arranged around the connection port.

The connector may include an upper connector and a lower connector spaced apart from a lower portion of the upper connector, and the stirring frame may include an upper stirring frame installed at the upper connector and a lower stirring frame installed at the lower connector.

And a guide connecting the upper stirring frame and the lower stirring frame, wherein the guide is installed at an end of the upper stirring frame and the lower stirring frame.

The guide may further include a reinforcing frame connecting the upper stirring frame and the lower stirring frame guides.

It is also preferable that an auxiliary stirring blade is provided between the upper stirring frame and the lower stirring frame to extend outward from the stirring rod and rotate together with the stirring rod.

In the present invention as described above, the soft ground can be strengthened by the agitating rod composed of only one shaft, and the stirring blade is rotated in the state where the stirring frame is fixed at the time of rotary excavation by the stirring rod. To be mixed.

1 is a flowchart showing a method of improving a soft ground using an auger according to the prior art.
2 is a front view showing an auger device according to the prior art.
3 is a front view showing a monoaxial piercing stirring apparatus for soft ground improvement according to the present invention.
4 is a partial perspective view showing a stirring frame of the uniaxial punching stirring apparatus for soft ground improvement according to the present invention.
5 is a plan sectional view showing a monoaxial piercing stirrer for soft ground improvement according to the present invention.

Hereinafter, a monoaxial piercing stirring apparatus for soft ground improvement according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the uniaxial punching stirrer for improving soft ground according to the present invention includes a stirring rod 210, a stirring blade 220, a connecting hole 230, and a stirring frame 240.

Further, as another preferred embodiment of the present invention as described above, it further includes a guide 250, a reinforcing frame 260, and an auxiliary stirring wing 270.

At this time, the stirring rod 210 is made of a single-shaft rotary rod so that it can be excavated and stirred with only one rod, and the stirring vane 220 rotates together with the stirring rod 210.

The connector 230 rotatably supports the stirring rod 210 via a bearing and the stirring frame 240 is coupled to the connector 230.

The guide 250 connects the vertically arranged stirring frames 240 to each other, and the reinforcing frame 260 connects the guides 250 to each other.

Accordingly, in the present invention, the softening ground is strengthened by injecting the solidifying agent into the soft ground with the agitating rod 210 having one axis and hardening it.

In addition, since only the stirring vane 220 is rotated in a state where the stirring frame 240 is fixed during excavation, the solidifying agent and the soil particles of the soft ground are mixed well.

More specifically, the stirring rod 210 is formed of a 1-axis and is rotated by the upper gear box installed on the ground, and the excavation proceeds.

As is known, the upper gear box is installed in the vertical reader of the machine, and the stirring rod 210 is connected to the upper gear box located on the ground via the connecting rod.

A spray hole 211 for spraying a solidifying agent is formed on one side of the stirring rod 210 (for example, a lower portion), and an auger 212 for excavation is provided at a lower end thereof.

As a solidifying agent, cement mixed with water is typically used, and a supply passage is formed in the hollow portion of the stirring rod 210, so that high pressure is injected through the injection hole 211.

The excavation auger 212 is provided at the lower end of the stirring rod 210, that is, the foremost end in the excavation progressing direction, and a plurality of excavation bits BT are attached to the auger 212 for excavation.

The upper end of the stirring rod 210 is used as a rod coupling part 213 and the coupling rod is inserted into the rod coupling part 213 and connected to the upper gear box of the machine installed on the ground.

Therefore, when the stirring rod 210 is rotated by the upper gear box, the soft ground is excavated, and at the same time, the solidifying agent is injected at high pressure through the injection hole 211.

Cement as a solidifying agent is filled in the perforations of the excavated soft ground, mixed with and stirred with the soii of the soft ground itself, and cured to improve the soft ground.

The stirring wing 220 extends outward from the stirring rod 210 and rotates together with the stirring rod 210 to stir the cement and the soil mixture.

The stirring vane 220 is fixed to the stirring rod 210 by welding or the like, and is usually extended in the horizontal direction.

In addition, a plurality of excavating bits BT are attached to the stirring vane 220, and the stirring rod 210 also enables stirring as well as stirring.

In FIG. 3, the stirring vanes 220 are provided on the upper and lower sides of the stirring frame 240, respectively, but they may be provided in various other numbers and patterns.

The connection hole 230 is inserted through the center of the stirring rod 210 and is rotatably coupled to the outer circumferential surface of the stirring rod 210 to rotate and support the stirring rod 210.

As will be described below, the connector 230 includes an upper connector 230_T and a lower connector 230_B provided at upper and lower portions along the stirring rod 210, for example.

The connection hole 230 is used to prevent the stirring frame 240 from rotating. For example, a 'bushing bearing' having a sliding prevention portion H and a bearing portion B may be used.

The sliding preventing portion H prevents the connecting portion 230 from moving up and down along the stirring rod 210. The sliding preventing portion H is inserted into a groove formed in the stirring rod 210 to maintain a fixed posture.

The bearing portion B (not shown in detail) supports the stirring rod 210. Even if the stirring rod 210 rotates while the coupling hole 230 is assembled to the stirring rod 210, Do not rotate.

Accordingly, the stirring frame 240 coupled to the stirring rod 210 through the coupling hole 230 moves up and down together with the stirring rod 210 during the excavation, and even if the stirring rod 210 rotates, It will not rotate.

The stirring frame 240 is extended outward from the connection hole 230 to maintain a fixed state without rotating even if the stirring rod 210 rotates.

The stirring frame 240 is composed of an upper stirring frame 240_T and a lower stirring frame 240_B corresponding to the connection holes 230 made up of the upper connection 230_T and the lower connection 230_B.

This stirring frame 240 maintains a fixed state during rotation of the stirring vane 220, thus providing relative movement in relation to the rotating stirring vane 220. [

Therefore, when the stirring blade 210 rotates and the stirrer 220 rotates in a state where the stirring frame 240 is fixed during the excavation, mixing and stirring of the cement and the soil particles are very easy.

If only the stirring blades 220 are provided as in the prior art, the cement and the ground particles are combined and rotated together with the stirring vane 220, so that the cement and the ground particles are not mixed well.

Therefore, conventionally, there arises a problem that more cement is injected or a longer mixing time is required to compensate for this.

On the other hand, the present invention provides the effect of mixing the cement and the soil particles very well only by the single-shaft stirring rod 210 without using the multi-axis stirring rod.

However, the stirring frame 240 of the present invention is formed longer than the stirring vane 220 so that the soft ground is inserted across the perforated hole at the time of excavation and the end thereof is inserted into the soft ground of a certain length (see E ' .

The distance from the axial center C of the stirring rod 210 to the end of the stirring vane 220 becomes the radius R of the hole drilled in the soft ground because the stirring vane 220 provides the excavation effect.

In this case, the stirring frame 240 is inserted into the soft ground (see FIG. 5) by forming the stirring frame 240 outwardly longer than the stirring vane 220, .

Even if the stirring frame 240 is not inserted into the soft ground, if the bearing (B) unit or the like is used as the coupling hole 230, it does not rotate or is slightly pushed by the mixture, but is inserted into the soft ground.

Accordingly, the stirring frame 240 of the present invention rotates the stirring rod 210 to maintain a fixed state during the excavation work, and at the same time, the soft ground penetrates in the vertical direction.

In addition, it is preferable that a plurality of the stirring frames 240 are provided, and the plurality of stirring frames 240 are radially arranged around the connection holes 230.

As shown in FIG. 4, for example, if four stirrer frames 240 are provided, the stirrer rod 210 is installed at 90 ° intervals along the outer circumferential surface thereof.

As the number of stirrers 240 increases, the mixing ratio of the cement and the soil particles increases proportionally. In this case, however, the friction between the cement and the ground increases, so an appropriate number is adopted.

In FIG. 4, the plate member connecting between the connector 230 and the stirring frame 240 is reinforced by the reinforcing member F, which is inserted into the soft ground so that the stirring frame 240 receives a large force when excavated.

'CP' means a coupling part. The coupling part 230 is formed into two parts so that the coupling part 230 can be easily fitted to the outer circumferential surface of the stirring rod 210, and the coupling part CP having the projection and groove is welded Bolts.

As described above, the connector 230 preferably includes an upper connector 230_T and a lower connector 230_B. The upper connector 230_T and the lower connector 230_B may include a stirring rod 210 And are spaced apart from the upper and lower portions.

The stirring frame 240 includes a lower stirring frame 240_B provided on the upper stirring frame 240_T and a lower stirring pin 240_B provided on the upper coupling 230_T.

Accordingly, the present invention is characterized in that a stirring stage 240 is provided between an upper stirring blade 220 and a lower stirring blade 220, and a two-stage stirring frame 240_B including an upper stirring frame 240_T and a lower stirring frame 240_B The stirring performance is further improved by the stirring member 240.

Meanwhile, the guide 250 simultaneously reinforces the upper stirring frame 240_T and the lower stirring frame 240_B by connecting the upper stirring frame 240_T and the lower stirring frame 240_B as described above.

Particularly, since the guide 250 is installed at the outer end of the upper stirring frame 240_T and the lower stirring frame 240_B, the guide 250 is also inserted into the soft ground and guides the advancement into the ground during excavation.

A plurality of guides 250 are also provided according to the number of the stirring frames 240. At this time, the reinforcing frame 260 connects the upper stirring frame 240_T and the guide 250 of the lower stirring frame 240_B do.

Therefore, not only the guide 250 is reinforced by the reinforcing frame 260, but also the reinforcing frame 260 that maintains the fixed state more effectively stirs the cement and the ground particles.

5 shows a planar arrangement of a stirring frame 240 having a stirring rod 210 as a center point, and a guide 250 and a reinforcing frame 260.

As shown in the drawing, the ends of the stirring frame 240 and the guide 250 are inserted and fixed in the soft ground during the excavation, so that the reinforcing frame 260 is also fixed.

Therefore, even if the cement and the ground particles rotate together with the stirring vane 220 between the upper and lower stirring vanes 220 as shown in FIG. 3, the fixing body of the present invention is mixed well with the fixing body.

Here, the fixture means the stir frame 240 and the reinforcement frame 260 exposed in the perforation hole of the soft ground, and the present invention improves the stirring property by providing the fixture in the uniaxial stirring rod 210.

The auxiliary stirring wing 270 not described above is installed between the upper stirring frame 240_T and the lower stirring frame 240_B and extends outward from the stirring rod 210 and rotates together with the stirring rod 210 .

According to the present invention having such a configuration, since the auxiliary stirring vane 270 rotates between the upper stirring frame 240_T and the lower stirring frame 240_B that maintain the fixed state, the stirring property is further improved.

The specific embodiments of the present invention have been described above. It is to be understood, however, that the scope and spirit of the present invention is not limited to these specific embodiments, and that various modifications and changes may be made without departing from the spirit of the present invention. If you have, you will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

210: stirring rod
211:
212: auger for excavation
213:
220: (upper and lower sides) stirring wing
230: Connector (Bushing type bearing)
230_T: Upper connector
230_B: Lower connector
240: stirring frame
240_T: upper stirring frame
240_B: Lower stirring frame
250: Guide
260: reinforcing frame
270: auxiliary stirring wing
H: Sliding prevention part
B: Bearing
R: Perforation radius
F: Reinforcement hole
E: Insertion length

Claims (7)

A stirring rod 210 having a spray hole 211 for spraying a solidifying agent on one side and an auger 212 for excavation on the lower side;
A stirring vane 220 extending outward from the stirring rod 210 and rotated together with the stirring rod 210;
A coupling hole 230 through which the stirring rod 210 is inserted into the hollow portion and which is rotatably coupled to the outer peripheral surface of the stirring rod 210; And
And a stirring frame (240) extending outwardly from the connection hole (230) to maintain a fixed state without rotating even when the stirring rod (210) rotates,
Wherein the stirring frame (240) is rotated while the stirring blade (210) is rotated to mix the solidifying agent sprayed through the spray hole (211) while the stirring blade (220) Single shaft punch stirring device for improvement. The method according to claim 1,
The stirring frame 240 is longer than the stirring vane 220,
Wherein the stirring frame (240) has a length that allows an end portion of the stirring frame (240) to be inserted into the soft ground through the hole to be drilled when the soft ground is excavated. 3. The method of claim 2,
Wherein the plurality of stirring frames (240) are arranged in a radial manner around the connecting hole (230), and the plurality of stirring frames (240) are arranged radially around the connecting hole (230). 4. The method according to any one of claims 1 to 3,
The connector (230)
An upper connector 230_T and a lower connector 230_B spaced from the lower portion of the upper connector 230_T,
The stirring frame 240
And a lower stirring frame 240_B provided on the lower connection hole 230_B and an upper stirring frame 240_T provided on the upper connection hole 230_T. 5. The method of claim 4,
The guide 250 further includes a guide 250 connecting the upper stirring frame 240_T and the lower stirring frame 240_B and the guide 250 is installed at the ends of the upper stirring frame 240_T and the lower stirring frame 240_B Wherein the one-shaft punching stirring device for soft ground improvement is characterized in that the punching device is a single shaft punching stirring device for soft ground improvement. 6. The method of claim 5,
Wherein the guide 250 further includes a reinforcing frame 260 connecting the upper stirring frame 240_T and the guide 250 of the lower stirring frame 240_B. Shaft punch stirring device. 5. The method of claim 4,
A subsidiary stirring vane 270 extending outward from the stirring rod 210 and rotating together with the stirring rod 210 is provided between the upper stirring frame 240_T and the lower stirring frame 240_B A single shaft piercing stirring device for soft ground improvement.
KR1020150062409A 2015-05-04 2015-05-04 Drilling and mixing apparatus using single rod for improving soft ground KR20160130539A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150062409A KR20160130539A (en) 2015-05-04 2015-05-04 Drilling and mixing apparatus using single rod for improving soft ground
SG10201508499WA SG10201508499WA (en) 2015-05-04 2015-10-14 Drilling and mixing apparatus using single rod for improving soft ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150062409A KR20160130539A (en) 2015-05-04 2015-05-04 Drilling and mixing apparatus using single rod for improving soft ground

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KR20160130539A true KR20160130539A (en) 2016-11-14

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101097359B1 (en) 2009-01-23 2011-12-23 석정건설주식회사 New Deep Cement Mixing Process for Strengthening Weak Soil and Apparatus therefor
KR20150029152A (en) 2013-09-09 2015-03-18 삼성물산 주식회사 High Pressure Jet Type Stirring Bit for the Hard Soil Layers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101097359B1 (en) 2009-01-23 2011-12-23 석정건설주식회사 New Deep Cement Mixing Process for Strengthening Weak Soil and Apparatus therefor
KR20150029152A (en) 2013-09-09 2015-03-18 삼성물산 주식회사 High Pressure Jet Type Stirring Bit for the Hard Soil Layers

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Publication number Publication date
SG10201508499WA (en) 2016-12-29

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