KR20090068415A - A ground pressure plate intergrated with packer and soil-nailing method using the same - Google Patents

A ground pressure plate intergrated with packer and soil-nailing method using the same Download PDF

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Publication number
KR20090068415A
KR20090068415A KR1020070136004A KR20070136004A KR20090068415A KR 20090068415 A KR20090068415 A KR 20090068415A KR 1020070136004 A KR1020070136004 A KR 1020070136004A KR 20070136004 A KR20070136004 A KR 20070136004A KR 20090068415 A KR20090068415 A KR 20090068415A
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KR
South Korea
Prior art keywords
hole
packer
nail
ground
integrated
Prior art date
Application number
KR1020070136004A
Other languages
Korean (ko)
Inventor
김진만
정하익
최봉혁
Original Assignee
한국건설기술연구원
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Application filed by 한국건설기술연구원 filed Critical 한국건설기술연구원
Priority to KR1020070136004A priority Critical patent/KR20090068415A/en
Publication of KR20090068415A publication Critical patent/KR20090068415A/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • 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
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
    • 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
    • E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
    • 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
    • E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
    • 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
    • E02D2250/00—Production methods
    • E02D2250/0038—Production methods using an auger, i.e. continuous flight type
    • 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

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

A packer integrated bearing plate and a soil nailing method using the same are provided to improve constructability and economical efficiency by installing a bearing plate and a packer at a single work with an integrated structure of a bearing plate portion and a friction grounding portion, thereby reducing work load. A packer integrated bearing plate, as an accessory used for a soil nailing method which performs grouting after inserting a nail(200) into a perforated hole of the ground, comprises a bearing plate portion(110) and a friction grounding portion(120), wherein the bearing plate portion is formed to be larger than the perforated hole to compress the ground at the front of the perforated hole and provided with a first through hole installed to penetrate a nail and a second through hole installed to penetrate a grouting hose(300), and the friction grounding portion is formed in the cylindrical shape by extending from one side of the bearing plate portion and installed to abut on the inner circumference of the perforated hole in case of being inserted to the perforated hole.

Description

A ground pressure plate intergrated with packer and soil-nailing method using the same}

The present invention relates to a packer-integrated acupressure plate and a soil nailing method using the same, and more particularly, the acupressure plate part and the friction ground part to simultaneously perform the role of a pressure plate to compress the ground of the front of the hole and the packer to close the front of the hole. It relates to a packer-integrated acupressure plate integrally formed, and a soil nailing method using the same.

Ground reinforcement works are made to reinforce adjacent slopes in railway and highway construction, or to prevent the collapse of the ground around excavation in the construction of civil engineering-related facilities involving excavation such as underground structures and tunnels.

Soil nailing method is a ground reinforcement method that increases the overall shear strength of the base itself by inserting a reinforcing material (nail) into the base and grouting, and suppresses the displacement of the ground by exerting the tensile force of the nail. As such, the small nailing method can make slope slope as steep slope to improve land use efficiency, and it is advantageous in terms of speed, simplicity, economic feasibility and advantages over other methods in terms of use of light equipment. It is widely used as a flexible ground reinforcement method. The reinforcing effect by the soil nailing method is determined by the strength of the nail itself, the friction between the grouting and the ground, and the friction between the nail and the grouting.

On the other hand, the method of performing the soil nailing method can be largely divided into two according to the specific grouting method. Gravity grouting method of Fig. 1 (a) and pressure grouting method of Fig. 1 (b).

Gravity grouting method is a method of filling the perforated hole by gravity due to the weight of grout material without a separate packer, which has the advantage of simplicity of user material. The disadvantage is that it is not so big.

The pressurized grouting method is a grouting method in which the front surface of the drilling hole is tightly closed. As a result of the pump pressure in the grouting process acting in the drilling hole, the grouting sphere is formed tightly, which increases the friction force between the grouting sphere and the ground. There is, however, a separate packer such as a rubber packer or an air packer, as well as a disadvantage in that the operation is accompanied by the installation and removal of the packer, or a section is not grouted according to the permanent purchase of the packer.

The present invention has been invented to improve the above-mentioned conventional problems, a packer-integrated acupressure plate that can solve the disadvantages of the existing gravity grouting method and the pressure grouting method in the grouting process as an accessory used in the soil nailing method, and such a packer There is a technical problem in providing a soil nailing method using an integrated acupressure plate.

In order to solve the above technical problem, the present invention is an accessory material used in the soil nailing method for grouting after inserting a nail into a boring hole of the ground,

An acupressure plate portion having a size larger than that of the punching hole, the plate-shaped portion compressing the ground of the front of the punching hole and having a first through-hole in which the nail penetrates in the surface and a second through-groove in which the grouting hose is penetrated; It provides a packer-integrated acupressure plate, characterized in that it comprises a; and a friction ground portion which is installed in contact with the inner circumferential surface of the drilling hole when inserted into the drilling hole as a portion formed in a cylindrical shape extending from one surface of the acupressure plate portion.

In addition, the present invention is to perform the soil nailing method using a packer-integrated pressure plate formed integrally with the pressure plate portion and the friction ground portion,

(a) perforating the ground to form perforations; (b) inserting the nail and the grouting hose into the drilling hole; (c) placing the packer-integrated pressure plate so that the nail and grouting hose pass through the first and second holes of the pressure plate portion, respectively, and then insert the friction ground portion into the drilling hole; (d) grouting the hole in the hole through the grouting hose to fix the nail inserted in the hole in the ground; And (e) fixing the nail to the acupressure plate while pressing the acupressure plate part to the ground around the perforation hole in the packer-integrated acupressure plate to provide a soil nailing method using a packer-integrated acupressure plate.

According to the present invention, the following effects are expected.

First, it is possible to install the acupressure plate and the packer in one operation due to the integrated structure of the acupressure plate and the friction grounding unit, thereby improving the workability and economical efficiency due to the reduction of the workload.

Second, since grouting is carried out by pressure, the perforated hole can be filled in a tight manner, and as a result, the reinforcing effect can be maximized.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

2 and 3 show a basic example of the packer-integrated pressure plate 100 according to the present invention and its use state. Packer-integrated acupressure plate 100 of the present invention as an accessory material used in the soil nailing method, to simultaneously perform the role of a pressure plate to compress the ground of the front hole (H) and the packer to close the front of the hole (H) The pressure plate 110 and the friction ground portion 120 is integrally configured.

The acupressure plate 110 is a plate-shaped portion that has a size larger than that of the drilling hole (H) and compresses the ground of the front of the drilling hole (H), and grouting with the first through hole (111) through which the nail (200) is installed in the surface. The second through hole 112 through which the hose 300 is installed is formed. Such acupressure plate portion 110 can be said to be the same as the acupressure plate provided alone usually. In particular, the second groove 112 of the acupressure plate portion may be further formed with a locking groove 113, the locking groove 113 of the second hole is a longitudinal support rod provided in the grouting hose 300 as shown in FIG. 310 serves to stably hold the position of the grouting hose 300 to the configuration provided to take.

The friction grounding part 120 extends from one surface of the pressure plate part and is formed in a cylindrical shape. When the friction grounding part 120 is inserted into the drilling hole H, the friction grounding part 120 is provided to be in contact with the inner circumferential surface of the drilling hole H. The friction ground portion 120 is a characteristic configuration of the present invention, is installed to contact the inner circumferential surface of the drilling hole (H) to exert frictional force with the ground of the inner circumferential surface of the drilling hole (H) to resist the pump pressure in the grouting process 400 It becomes the structure to say. Such a friction ground portion 120 is to determine the length in consideration of the characteristics of the ground to be installed and the pump pressure in the grouting process, and also considering the permanent buried in the ground as a material having a certain stiffness of the pressure plate portion ( It is preferable to manufacture the same as 110.

4 is a modified example of the packer-integrated pressure plate 100 according to the present invention, the friction ground portion 120 is an example formed in a tapered shape that the diameter gradually decreases away from the pressure plate portion 110. The tapered shape facilitates the insertion of the boring hole H of the friction grounding part 120 while facilitating the fixation in the boring hole H of the friction grounding part 120. In this case, the tapered friction grounding unit 120 may be inserted into the drilling hole H by simply inserting the end of the tapered friction grounding unit 120 into the drilling hole H and hitting it with a hammer.

In addition, Figure 4 shows a state in which a plurality of slits 121 are formed in the friction ground portion 120, the slits 121 are formed by cutting toward the pressure plate portion 110 at the end of the friction ground portion 120 is tapered Like the outer shape, the friction hole 120 serves to facilitate the insertion of the drilling hole (H). 3 is an example in which the slits 121 are formed in the tapered shape, but the slits 121 may be formed in the general cylindrical shape as shown in FIG. 2.

5 shows a soil nailing method using a packer-integrated pressure plate 100 according to the present invention, and the soil nailing method will be described step by step with reference to this.

(a) Ground drilling (Fig. 5 (a))

The ground is drilled to form a drill hole (H). At this time, it is preferable to use the screw (S) as the ground boring as shown in Figure 5 (a), to increase the main surface friction after the grouting (400) by roughening the inner peripheral surface of the drilling hole (H).

(b) Nail installation (Fig. 5 (b))

Insert the nail 200 and the grouting hose 300 into the drilling hole (H). Since the nail 200 is located in the center of the drilling hole (H) to maximize the reinforcing effect, the nail 200 is to be installed using the nail spacer 210. As the nail 200, a deformed rebar generally used is adopted.

(c) Installation of packer integrated pressure plate (Fig. 5 (c))

The packer-integrated shiatsu plate 100 composed of the shiatsu plate part 110 and the friction grounding part 120 is prepared, and the nail 200 and the grouting hose 300 inserted into the boring hole H each have a first through hole ( After placing the packer-integrated pressure plate 100 to penetrate the 111 and the second through hole 112, the friction grounding part 120 is inserted into the hole H. Packer-integrated pressure plate 100 can be installed by lightly hitting the pressure plate 110 with a hammer.

(d) grouting (FIG. 5 (d))

The grouting hose 300 through the grouting hose 300 is grouted 400 to fix the nail 200 inserted in the drilling hole H to the ground. The grouting operation 400 is performed by pulling the grouting hose 300 gradually after positioning the grouting hose 300 at the perforated hole H, and finally removing the grouting hose 300. In particular, the packer-integrated pressure plate 100 is a locking groove 113 is formed in the second through hole 112 of the pressure plate portion and the grouting hose 300 is a support rod 310 is formed in the longitudinal direction if the grouting hose 300 is a support rod ( It is possible to receive the guide of the engaging groove 113 of the second through the 310, as a result it is possible to uniformly proceed the grouting 400 while maintaining a stable position of the grouting hose (300). The grouting 400 proceeds with a pump pressure of about 5 kg / cm 2, and the pump pressure at the grouting 400 is closed because the front part of the drilling hole H is closed by the installation of the packer-integrated pressure plate 100. It acts directly in H), thereby enabling pressurized grouting 400.

(e) Crimping (Fig. 5 (e)

The nail 200 is fixed to the acupressure plate 110 while pressing the acupressure plate 110 in the packer integrated pressure plate 100 to the ground around the hole H. The fixing of the acupressure plate part 110 may be performed by fastening the fixing nut 500 to the nail 200 protruding from the acupressure plate part 110. This completes the ground reinforcement by soil nailing.

Although the present invention has been described in detail with reference to the described embodiments, those skilled in the art to which the present invention pertains will be capable of various substitutions, additions and modifications without departing from the technical spirit described above. It is to be understood that such modified embodiments also fall within the protection scope of the present invention as defined by the appended claims below.

1 shows a conventional soil nailing method.

2 and 3 show one embodiment of the packer-integrated pressure plate according to the present invention and its use state.

4 shows another embodiment of a packer-integrated pressure plate according to the present invention.

Figure 5 illustrates a soil nailing method using a packer-integrated pressure plate according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: packer integrated pressure plate

110: acupressure plate 111: first through hole

112: second opening 113: locking groove

120: friction ground portion 121: slit

200: nail 210: nail spacer

300: grouting hose 310: support rod

400: grouting 500: fixing nut

H: Hole S: Screw

Claims (7)

As an accessory material used in the soil nailing method of inserting the nail 200 into the boring hole H of the ground and performing the grouting 400, It is a plate-shaped portion that has a size larger than that of the drilling hole (H) and compresses the ground on the front surface of the drilling hole (H), and the first through hole (111) and the grouting hose (300) through which the nail (200) is installed in the surface penetrate. Acupressure plate 110 is formed with a second through-hole 112 to be installed; And, A friction ground portion 120 extending from one surface of the acupressure plate portion and formed in a cylindrical shape, the friction ground portion 120 being installed to contact the inner circumferential surface of the drilling hole H when inserted into the drilling hole H; Packer-integrated acupressure plate, characterized in that comprises a. In claim 1, The friction grounding unit 120 is packer-integrated acupressure plate, characterized in that formed in a tapered shape that the diameter gradually decreases away from the pressure plate 110. In claim 1, The friction ground portion 120 is cut from the end toward the acupressure plate portion 110, the packer-integrated acupressure plate, characterized in that a plurality of slits 121 are formed. The method according to any one of claims 1 to 3, The acupressure plate part 110 is a packer-integrated acupressure plate, characterized in that the second through hole 112 is formed to have a locking groove 113 is caught by the support rod 310 provided in the grouting hose (300). By using the packer-integrated pressure plate 100 of any one of claims 1 to 3 to perform the soil nailing method, (a) drilling the ground to form a drilling hole (H); (b) inserting and installing the nail 200 and the grouting hose 300 in the drilling hole H; (c) the nail 200 and the grouting hose 300 are positioned to pass through the packer-integrated pressure plate 100 so as to pass through the first through hole 111 and the second through hole 112, respectively, the friction ground portion 120 Inserting the through hole H; (d) fixing the nail 200 inserted into the drilling hole H to the ground by grouting the inside of the drilling hole H through the grouting hose 300; And, (e) fixing the nail (200) to the pressure plate (110) while pressing the pressure plate (110) to the ground around the hole (H) in the packer integrated pressure plate (100); Soil nailing method using a packer-integrated acupressure plate comprising a. In claim 5, Said step (a) is a soil nailing method using a packer-integrated pressure plate, characterized in that using a screw (S). In claim 5, Step (b) is a nail nailing method using a packer-integrated acupressure plate, characterized in that the nail 200 using the nail spacer 210 is arranged in the center of the hole (H).
KR1020070136004A 2007-12-24 2007-12-24 A ground pressure plate intergrated with packer and soil-nailing method using the same KR20090068415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070136004A KR20090068415A (en) 2007-12-24 2007-12-24 A ground pressure plate intergrated with packer and soil-nailing method using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070136004A KR20090068415A (en) 2007-12-24 2007-12-24 A ground pressure plate intergrated with packer and soil-nailing method using the same

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KR20090068415A true KR20090068415A (en) 2009-06-29

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