KR20170011850A - Ground Improving Devive and Ground Improving Method Using The Same - Google Patents

Ground Improving Devive and Ground Improving Method Using The Same Download PDF

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Publication number
KR20170011850A
KR20170011850A KR1020150105236A KR20150105236A KR20170011850A KR 20170011850 A KR20170011850 A KR 20170011850A KR 1020150105236 A KR1020150105236 A KR 1020150105236A KR 20150105236 A KR20150105236 A KR 20150105236A KR 20170011850 A KR20170011850 A KR 20170011850A
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South Korea
Prior art keywords
hollow
foundation pile
rotary body
hole
hollow rotary
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KR1020150105236A
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Korean (ko)
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KR101824049B1 (en
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강상욱
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(주)아리터
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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
    • 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
    • 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

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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

Thereby providing a ground improvement device.
The present invention relates to a hollow fiber membrane module having an inner diameter that is relatively larger than the outer diameter of a foundation pile to which a lower end is fixed in a perforation hole formed at a certain depth below the ground, A rotation part disposed on the foundation pile and having a connection part provided on the hollow rotation body and connected to an external power source; And a plurality of stirring vanes extending outwardly from an outer surface of the hollow rotary body so as to contact with the inner surface of the hollow hole to expand the upper inner diameter of the hollow hole of the hollow rotary body during the rotation, A scraping bridge half which stirs the injected material with the soil; .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement apparatus,

The present invention relates to a device for improving ground and a method for improving the ground using the same. More particularly, the present invention relates to an apparatus for improving a ground by drilling a foundation file in a perforation hole and enlarging an upper region of the perforation hole, To a ground improvement device capable of improving the ground by injecting injection material and stirring the ground material, and a ground improvement method using the same.

In general, the apparatus for improving ground includes a drilling head having an excavating bit mounted on a rotary rod of an auger facility, drilling downward to a predetermined depth by a rotational force of the drilling head to form a perforation hole having a predetermined depth, Filling the grout mixed with water and cement from the lowermost part of the perforation hole, filling the grouting hole with the pile, and reinforcing the ground strength by the grout hardened.

In the method of forming a perforation hole with a predetermined depth by using the excavation head, an enlarged bit for enlarging excavation for expanding the inner diameter of the lower end of the perforation hole drilled by the excavating head of the rod is further provided, .

KR 10-2011-0024145 A Patent Literature 1 discloses a hydraulic excavator having an excavating bit formed at a lower end of a drilling pipe, an air line pipe communicating with the inside of the excavating pipe, a first and a second swiveling device, a power head coupled with the lead, And a piercing device for soil improvement is disclosed. However, such a conventional soil remedying apparatus performs a diametrically enlarging operation to enlarge the entire inner surface of the perforated hole while rotating the hollow rotary body connected to the excavating bit, so that only the specific portion corresponding to the upper end of the perforated hole is enlarged to improve the ground Work was difficult. Further, in the file construction where the lower end of the foundation pile is inserted into the perforation hole formed at a certain depth below the ground, it is impossible to improve the ground by injecting an injection material such as grouting after enlarging the inner diameter of the perforation hole.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method for drilling holes in a drilled hole, The present invention provides a ground improvement device capable of improving the ground by agitation and a ground improvement method using the same.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

As a specific means for achieving the above object, a preferred embodiment of the present invention is characterized in that it has an inner diameter that is relatively larger than the outer diameter of a foundation pile to which a lower end is fixed, in a perforation hole formed at a certain depth below the ground, A hollow rotating body which is rotated in one direction to move up and down in the direction of the length of the foundation file; and a rotation unit disposed on the foundation file, the hollow rotation body being provided on the hollow rotation body and connected to an external power source; And a plurality of stirring vanes extending outwardly from an outer surface of the hollow rotary body so as to contact with the inner surface of the hollow hole to expand the upper inner diameter of the hollow hole of the hollow rotary body during the rotation, A scraping bridge half which stirs the injected material with the soil; The present invention provides a ground improvement apparatus comprising:

Preferably, the hollow rotating body has an opening of a predetermined size formed in the opening to discharge the injected material or water injected into the space into the space between the perforation hole and the hollow rotating body.

Preferably, the hollow rotating body has an inner protective layer made of a rubber material or a resin material on an inner surface facing the foundation pile.

Preferably, the hollow rotating body has a spacer made of a rubber material or a resin material so as to maintain a gap between the outer surface of the base pile and the inner surface of the hollow rotating body.

Preferably, the connecting body includes a hollow body which is formed by projecting a polygonal rope on an upper surface closed to be inserted into and connected to a polygonal hole of a connection portion provided in an external power source, and communicating with an upper end of the hollow rotary body.

Preferably, the connecting body includes a swabel connecting portion for injecting injection material or water into the perforation hole through the hollow rotating body, and the swabel connecting portion is connected to the connecting body, And an outer circular block which is rotatably supported with respect to the upper and lower ends of the circular block for injection while being connected to the injection line and filled with an injection material or water, And a circular support ring fixedly installed on the support ring.

According to a preferred embodiment of the present invention, there is provided a method for constructing a foundation pile, comprising the steps of: A hollow rotary body having a plurality of stirring blades having a relatively larger inner diameter than the outer diameter of the foundation pile and extending at a predetermined length on the upper portion of the foundation pile so that the end thereof is in contact with the pile hole is disposed directly above the base pile step ; The hollow rotary body is unidirectionally rotated by an external power source via a connector provided at the upper end of the hollow rotary body so that the opened mouth of the hollow rotary body is lowered to enter the upper end of the foundation pile, Forming a enlarged diameter portion in an adjacent perforation hole; Stirring the injected material and the soil injected into the enlarged diameter portion by a stirring blade of a hollow rotary body disposed in the enlarged diameter portion and rotating in one direction; And drawing out the hollow rotating body to the outside and then solidifying the injection material injected into the perforation hole including the enlarged diameter portion to complete the soil improvement work.

According to a preferred embodiment of the present invention as described above, the following effects can be obtained.

(1) By rotating the hollow rotary body around the foundation punched hole in the perforation hole, it is possible to easily form the enlarged diameter portion in the upper region of the perforation hole by the stirring blades rotated together with the hollow rotary body .

(2) By solidifying the injected material agitated with the soil in the enlarged portion, it is possible to increase the horizontal supporting force of the ground pile to the surrounding ground, so that the reliability of the ground improvement can be improved by sufficiently reinforcing the foundation pile and the ground.

1 is a perspective view illustrating a ground improvement apparatus according to a preferred embodiment of the present invention.
2 is an exploded perspective view showing a ground improvement apparatus according to a preferred embodiment of the present invention.
3 is a cross-sectional perspective view illustrating a ground improvement apparatus according to a preferred embodiment of the present invention.
4 is a state diagram illustrating a ground improvement apparatus according to a preferred embodiment of the present invention.
5A and 5B are process diagrams illustrating a ground improvement apparatus according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

As shown in FIGS. 1 to 3, the ground improvement apparatus 100 according to the preferred embodiment of the present invention enlarges and strengthens the upper end region of the perforation hole close to the ground to enhance and reinforce the ground, And includes a rotation unit 110 and a magnification bridging unit 120 to increase a horizontal supporting force.

The rotating unit 110 includes a hollow cylindrical rotating body 111 and a connecting body 112 connected to an external power source 10 such as an auger. And a substantially hollow cylindrical metal pipe body having an inner diameter larger than an outer diameter of the base pipe P to which the lower end is fixed, in the perforation hole H formed by a perforation facility such as a bit.

The hollow rotary body 111 is formed of a substantially hollow cylindrical metal pipe having an outer diameter larger than the outer diameter of the base pile P and smaller than an inner diameter of the hollow hole H, The hollow rotary body 111 disposed between the inside of the perforation hole and the outside of the foundation file performs rotation and up-and-down movement in one direction with respect to the base file P fixed to the inner peripheral surface of the perforation hole and the outer peripheral surface of the foundation file, .

Here, the hollow rotary body 111 has an opening 117 having a predetermined size and formed so as to be capable of discharging the injection material or water injected into the space by a later-described swabel connecting portion into a space between the hollow hole and the hollow rotary body .

In order to prevent damage to the foundation pile when the hollow rotating body is brought into contact with the foundation pile due to shaft deformation during rotation of the hollow revolving body with respect to the base pile P) fixed to the inner surface of the hollow rotary body 111, And an inner protective layer 119 made of a resin material.

In addition, a circular ring 111 made of a resin material or a rubber material is provided at the lower end of the hollow rotary body 111 so as to maintain a constant distance between the outer surface of the foundation pile P, which is a fixture, and the inner surface of the hollow rotary body, Shaped spacers 118, as shown in FIG.

The spacer 118 tightly fixed to the inside of the hollow cylindrical body 111 is formed in a circular ring shape having an inner diameter larger than the outer diameter of the base pile P, However, the present invention is not limited thereto, and a plurality of the hollow cylindrical bodies may be fixedly installed at predetermined positions on the inner surface of the hollow cylindrical body facing the foundation pile.

The coupling body 112 is provided at the upper end of the hollow rotary body 111 so as to be movable in one direction by the external power source 10 such as an auger device and in the direction of the base file, 10).

The connecting body 112 is formed by projecting a polygonal bar 113 such as a hexagonal cross-section on the upper surface closed to be inserted into and connected to the polygonal hole 13 of the connecting portion provided in the external power source 10 such as an auger apparatus, And a hollow body communicating with the upper end of the hollow rotating body 111.

Accordingly, the hollow rotating body 111 is connected to the connecting portion of the external power source 10, which can rotate and move up and down like the auger device, by means of the polygonal bar corresponding to the polygonal hole via the connecting body 112 The hollow rotary body 111 rotates in one direction with the foundation pile P as a rotary axis at a position directly above the foundation pile H which is fixedly installed at the lower end of the hollow pile H, It is possible to move up and down along the longitudinal direction of the file P.

Here, the foundation pile P, which is fixedly installed or press-fit to fix the lower end to the perforation hole, may be a PHC file or a steel pipe file, but is not limited thereto and may be formed of various types of foundation piles.

In addition, the connecting body 112 includes a swabel connecting part 115 for injecting an injection material such as a cement solidifying agent or water into the hole through the hollow rotating body for the purpose of improving the ground. The connection part 115 is slidably provided on the outer side of the connection part so as to communicate with the injection port 114 formed in the connection part and connected to the injection line 116 to be connected to the injection block 115a And a circular support ring 115b which is rotatably supported on the upper and lower ends of the injection circular block and is fixed to the outer surface of the coupling body 112. [

The injection material supplied to the inner space of the injection circular block 115a through the injection line 116 is injected into the hollow rotary body through the injection hole 114 communicated with the injection circular block 115a Can be supplied.

At this time, since the injection circular block 115a connected to the injection line is assembled so as to be relatively rotatable relative to the upper and lower circular support rings 115b fixed to the outer surface of the coupling body, It is possible to supply the injection material while the connector is rotated.

The refractory bridging part 120 expands the upper inner diameter of the perforation hole H at the same time as the rotation of the hollow rotary body 111 and upward and downward move the injection material injected into the perforation hole through the hollow rotary body 111, And a plurality of stirring vanes 123 extending a predetermined length outwardly from the outer surface of the hollow rotary body 111 so as to be able to stir the hollow rotating body 111 and having an end contacted with an inner surface of the hollow hole.

The stirring blade 123 has a predetermined length of a plate body 121 whose one end is fixed to the outer surface of the hollow rotating body and an upper edge integrally connected to the lower surface of the plate body, And a support bracket 122 for supporting the plate body.

Herein, the plate body 121 is formed by drilling for expanding the inner diameter of the perforation hole by the stirring vane 123, and for imaginarily passing through the center of the foundation pile P so that agitation between the injected injection material and the soil can be smoothly performed. It is preferable that the light guide plate is inclined at a predetermined angle with respect to a horizontal axis orthogonal to the vertical axis.

Accordingly, when the hollow rotary body is lowered to the lower right portion together with the rotation of the hollow rotary body 111 disposed directly above the foundation pile P, the hollow shaft rotates unidirectionally around the foundation pile When the stirring vane 123 provided on the outer surface of the whole body 111 rotates, the upper end of the foundation pile corresponds to the upper end of the foundation pile by the stirring blades extending outward of the hollow rotating body 111, The diameter of the perforation hole is enlarged.

At this time, the inner diameter of the perforation hole H is enlarged by the stirring vane 123 so that water can be supplied through the injection hole formed in the stirring vane so that the enlarging operation for forming the enlarged diameter portion H1 can be smoothly performed. And water is supplied through a supply line provided in the longitudinal direction of the rotating body to be discharged to the outside.

Next, a hollow portion H1 is formed on the upper portion of the perforation hole H, and then the injection material injected into the hollow cylindrical body is injected through the injection line 116 of the swabel connecting portion 115 At the same time, when the hollow cylindrical member 111 is rotated in one direction, the injected material discharged to the perforation hole side through the opening 117 of the hollow cylindrical body and the soil excavated at the time of the enlargement of the enlarged diameter portion, They are mixed with each other and mixed.

On the other hand, by using the ground improvement device 100 having the above-described construction and the foundational file P, the enlarged portion H1 is formed on the upper part of the perforation hole corresponding to the upper end of the foundation file P, As shown in FIGS. 5A and 5B, in the method of improving the ground by agitating the soil excavated from the neck portion H1 and the injection material, the lower end is fixed to the perforation hole H formed at a certain depth below the ground surface A base file P having a predetermined length is constructed.

The perforation hole H is formed by the rotation of the screw shaft 2 having the excavating bit 1 at the lower end thereof and the base file P is formed so as to be perpendicular to the inner center of the perforation hole, It is fixed on the bottom surface and is applied.

It is preferable that the upper end of the foundation pile P installed perpendicularly to the inner center of the perforation hole is exposed and fixedly installed so as to be located at a relatively higher position than the ground.

Although the lower end of the foundation pile has been illustrated and described as being fixed by solidification of the filling material filled in the bottom of the punched hole, the present invention is not limited to this, and the lower end of the foundation pile may be fixed to the bottom of the pierced hole by a certain depth .

As shown in Fig. 5C, the step of forming the enlarged diameter portion H1 in the upper region of the perforation hole has a relatively larger inner diameter than the outer diameter of the base pile P And a hollow rotating body 111 having a plurality of stirring blades 123 having a predetermined length are arranged on the base pile P.

In this state, when the hollow rotary body connected to the external power source 10 such as the auger equipment is rotated in one direction and the hollow rotary body is lowered to the lower portion, the open mouth of the hollow rotary body is moved The inside diameter of the hole can be enlarged by inserting the inside of the hole by means of a stirring blade provided on the hollow rotary body rotated around the rotation axis of the foundation pile.

At this time, the water is supplied to the space between the hollow rotary body 111 and the perforation hole H so that the enlarging operation for enlarging the inner surface of the perforation hole can be smoothly performed by the rotation of the stirring vane 123 desirable.

This water supply may be made through the interior of the hollow cylinder or through a supply line extending to the stirring vane.

The process of forming the enlarged diameter portion H1 having a relatively large inner diameter size in the upper region in the perforation hole H has been illustrated and described as being formed by the lowering of the hollow rotary member, And repeatedly performing up and down movement of the hollow rotary body.

As shown in FIG. 5D, the stirring process performed after forming the enlarged diameter portion injects the injection material into the space between the hollow rotary body 111 and the enlarged diameter portion H1, (111) is rotated in one direction, the injected material and the soil are mixed by mixing with stirring vanes provided on the outer surface of the hollow rotating body.

At this time, by vertically moving the hollow cylindrical body 111 which is rotated in one direction by the external power source, stirring between the injection material and the soil by the stirring blades can be performed more smoothly.

Finally, when the stirring operation between the injection material and the soil is completed, as shown in FIG. 5E, the hollow rotary body 111 is taken out to the outside, and then the injection material mixed with the soil in the perforation hole including the diameter- So as to reinforce the surrounding ground of the punched foundation file to complete the ground improvement which increases the horizontal supporting force.

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 scope of the inventions. It will be apparent to those of ordinary skill in the art.

110:
111: Hollow rotating body
112:
113: Multicarrival
114: inlet
115: Swabel connection
116: injection line
117: opening
118: Spacer
119: inner protective layer
120: Chorus Bridge
121:
122: support bracket
P: Basic file
H: Perforation hole
H1:
10: External power source
13: multiple holes

Claims (7)

A hollow rotating body having an inner diameter that is relatively larger than an outer diameter of a foundation pile to which a lower end is fixed, and which is rotated in one direction by an external power source to move up and down in the direction of the foundation pile, A rotary part provided on the hollow rotary body and disposed on the upper portion of the foundation pile with a connection body connected to an external power source;
And a plurality of stirring vanes extending outwardly from an outer surface of the hollow rotary body so as to contact with the inner surface of the hollow hole to expand the upper inner diameter of the hollow hole of the hollow rotary body during the rotation, A scraping bridge half which stirs the injected material with the soil; . The method according to claim 1,
Wherein the hollow rotating body has an opening having a predetermined size and formed so as to be capable of discharging the injected material or water injected into the hollow into the space between the perforated hole and the hollow rotating body. The method according to claim 1,
Wherein the hollow rotating body has an inner protective layer made of a rubber material or a resin material on an inner surface facing the foundation pile. The method according to claim 1,
Wherein the hollow rotating body includes a spacer made of a rubber material or a resin material so as to maintain a gap between an outer surface of the foundation pile and an inner surface of the hollow rotating body. The method according to claim 1,
Wherein the connecting body comprises a hollow body which is formed by projecting a polygonal rope on an upper surface closed to be inserted and connected to a polygonal hole of a connecting portion provided in an external power source and communicating with an upper end of the hollow rotary body. The method according to claim 1,
Wherein the connecting body includes a swabel connecting portion for injecting an injection material or water into the perforation hole through the hollow rotating body,
Wherein the swabel connecting portion includes a circular block for injection which is slidably provided on the outer side of the connecting body so as to communicate with the inlet formed in the connecting body and is connected to the injection line to inject or fill the injection material or water, And a circular supporting ring which is rotatably supported with respect to the upper and lower ends of the block and fixed to the outer surface of the connecting body. Constructing a foundation pile so that a lower end thereof is fixed to a perforation hole formed at a certain depth below the ground;
A hollow rotary body having a plurality of stirring blades having a relatively larger inner diameter than the outer diameter of the foundation pile and extending at a predetermined length on the upper part of the foundation pile so that the end thereof is in contact with the pile hole, step ;
The hollow rotary body is unidirectionally rotated by an external power source via a connector provided at the upper end of the hollow rotary body so that the opened mouth of the hollow rotary body is lowered to enter the upper end of the foundation pile, Forming a enlarged diameter portion in an adjacent perforation hole;
Stirring the injected material and the soil injected into the enlarged diameter portion by a stirring blade of a hollow rotary body disposed in the enlarged diameter portion and rotating in one direction;
And a step of solidifying the injection material injected into the perforation hole including the enlarged diameter portion to complete the ground improvement work by drawing out the hollow revolving body to the outside,
KR1020150105236A 2015-07-24 2015-07-24 Ground Improving Devive and Ground Improving Method Using The Same KR101824049B1 (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
KR101977791B1 (en) * 2019-03-06 2019-08-28 (주)씨엘지오텍 Construction method of pile with Soil Cement mixing Foundation
KR20190106116A (en) * 2018-03-07 2019-09-18 백규호 Construction apparatus of Cylindrical type pile and Construction apparatus of Taper type pile and Construction method of Taper type pile
CN114277831A (en) * 2022-01-11 2022-04-05 中国电建集团福建省电力勘测设计院有限公司 Offshore pawl type concrete filled steel tube pile foundation, adaptive drill bit and foundation construction method
CN115387322A (en) * 2022-04-19 2022-11-25 西南石油大学 Multi-angle grouting soil body reinforcing device beneficial to global diffusion of grout

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KR101998208B1 (en) * 2019-02-08 2019-07-09 주장훈 Double rod type mixing equipment and mixing method for harding ground using the same

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KR20110024145A (en) 2009-09-01 2011-03-09 신영애 Drilling device for ground improvement, construction method thereof and construction management system

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KR200283428Y1 (en) * 2002-04-20 2002-07-26 주식회사 동아지질 The device for JSP
KR200283388Y1 (en) * 2002-05-04 2002-07-26 원 회 양 Mortar consolidated grouting injection structure

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Non-Patent Citations (3)

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Title
그러나, 이러한 종래의 지반개량장치는 굴착비트와 연결된 중공회전체를 회전시켜 굴착하면서 천공홀의 내부면 전체를 확대하는 확경작업을 수행하기 때문에 천공홀의 상단에 해당하는 특정부위만 확경하여 지반을 개량하는 작업이 곤란하였다.
또한, 기초파일의 하부단이 지면아래에 일정깊이 형성된 천공홀에 근입된 파일 시공상태에서는 천공홀의 내경을 확대한 다음, 그라우팅과 같은 주입재를 주입하여 지반을 개량하는 작업이 불가능하였다.
특허문헌 1에는 굴착파이프의 하단에 십자형으로 형성된 굴착비트와, 굴착파이프의 내부와 연통된 에어라인 파이프와, 제1,2스위블장치와, 리더와 결합되는 파워헤드와, 온도감지날개 및 콘넥터로 이루어지는 지반개량용 천공장치를 게시하고 있다.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190106116A (en) * 2018-03-07 2019-09-18 백규호 Construction apparatus of Cylindrical type pile and Construction apparatus of Taper type pile and Construction method of Taper type pile
KR101977791B1 (en) * 2019-03-06 2019-08-28 (주)씨엘지오텍 Construction method of pile with Soil Cement mixing Foundation
CN114277831A (en) * 2022-01-11 2022-04-05 中国电建集团福建省电力勘测设计院有限公司 Offshore pawl type concrete filled steel tube pile foundation, adaptive drill bit and foundation construction method
CN114277831B (en) * 2022-01-11 2023-09-22 中国电建集团福建省电力勘测设计院有限公司 Offshore pawl type steel pipe concrete pile foundation, adaptive drill bit and foundation construction method
CN115387322A (en) * 2022-04-19 2022-11-25 西南石油大学 Multi-angle grouting soil body reinforcing device beneficial to global diffusion of grout
CN115387322B (en) * 2022-04-19 2023-08-04 西南石油大学 Multi-angle grouting soil body reinforcing device for helping slurry global diffusion

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