KR100697333B1 - A packer for pressure type soil nailing - Google Patents

Abstract

A pressure soil nailing packer for stabilizing a slope in a road and a building complex is provided to cut down construction costs by simplifying the structure, and to reduce the construction period by sealing a nail hole with a spider open by charge pressure of mortar without a blowing agent. A pressure soil nailing packer for stabilizing a slope includes a spider fixed to a circumference of a nail inserted to a nail hole(2) and contacted to an inner wall of the nail hole for sealing, and a valve plate(20) penetrated by a mortar injection hose(3), installed slidably in front of the spider and pushed to the spider by charge pressure of mortar to open the spider. The spider has a hub(11) combined with an outer periphery of the nail, a sealing blade(12) overlapped at an end of the hub, folded and arranged radially, and an elastic member elastically supporting and opening the sealing blades to the inner wall of the nail hole. A sealing part(13) is bent horizontally in the outer periphery of the sealing blade, and contacted to the inner wall of the nail hole.

Description

Pressure nailing packer for road and complex slope stabilization {A PACKER FOR PRESSURE TYPE SOIL NAILING}

1 is a perspective view of a state in which the road and only slope stable pressure nailing packer coupled to the nail in accordance with the present invention.

Figure 2 is an exploded perspective view of the road and the slope slope pressure nailing packer according to the present invention.

Figures 3a to 3c is an operational state diagram of the road and only slope stabilizing pressure nailing packer according to the present invention, respectively.

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

1: nail, 2: nail ball

3: mortar injection hose, 10: spider

11 hub, 12 sealing wings

13: sealing part, 14: hose fixing hole

15: air exhaust, 16: tie band

17: O-ring, 20: valve plate

21: sliding hub, 22: pressing part

30: sealing material,

The present invention relates to a pressure nailing packer for road and slope slope, and more particularly, to simplify the operation by allowing the packer to be in close contact with the nail hole naturally by mortar filled inside the nail hole without a separate sealing operation. A pressure nailing packer for road and just slope stabilization.

In general, as the industry develops, it is unavoidable to develop steep slopes such as mountain areas by complex construction or construction of new towns. Therefore, construction efficiency, economic feasibility and environmental preservation can be improved while increasing the utilization of land and securing stability and comfort of residential complexes. of

There is a need to establish a method to satisfy slope stability.

Soil Nailing, which is widely used as slope stabilization method, is a ground reinforcement method and is widely used in Europe and the United States for the purpose of reinforcing slopes and flexible support for excavated surfaces.

Such a nail nailing method is a method of inserting nails into the base at relatively tight intervals without prestressing to increase the overall shear strength of the base itself and possibly restrain the expected displacement of the ground during or after construction.

In particular, in the case of the alternative construction site, compared to other construction methods such as heavy concrete wall, thumb pile wall, and in-situ slurry wall, the soil nailing method has a low construction cost, light weight construction equipment, adaptability to site conditions and ground conditions, and flexibility. Support relative advantages, etc.

It is characterized by the fact that even in the case of a dynamic load such as an earthquake, it can fully exhibit its resistance without excessive displacement.

The basic design concept of the soil nailing method is to maintain stability on any inclined surface that the reinforcement soil walls can assume by integrating the ingot of the area reinforced by nailing as if it is an integrated retaining wall.

Conventional soil nailing method is made in the order of nail hole drilling, nail installation, nail ball sealing, nail ball placing and the like.

Since the present invention relates to a packer, only the packer used in the nail hole sealing process of the soil nailing method will be described.

The packer seals the nail so that the mortar does not leak out of the nail when filling the filler such as mortar after the nail is installed in the nail, for example, as Utility Model No. 290351. There is a proposed packer for pressure soil nailing.

A pressure soil nailing packer according to the prior art is to be inserted into a hole drilled in the excavation surface to seal the grouting area, the nail; First and second packings which are fitted at predetermined intervals on the center portion in the longitudinal direction of the nail; A nonwoven fabric installed to surround the outer circumferential surfaces of the first packing and the second packing to seal a space between the first packing and the second packing; A first grouting tube penetrating the first packing and the second packing, one end of which is installed at a position close to one end of the nail, for injecting grout chemical into the grouting area; An air and foreign matter removing tube through the first packing and the second packing, one end of which is installed in close proximity to the second packing, and for removing air and foreign matter from the grouting area according to the grouting; Foam urethane for penetrating the first packing, one end of which is located in the space between the first packing and the second packing, and injects the foamed urethane into the space enclosed by the nonwoven fabric, the volume of which expands upon gelation. It consists of an injection tube.

The packer for pressure soil nailing according to the prior art is inflated by the injection of a separate quick swelling agent to seal the nail ball.

That is, before injecting a filler such as cement milk into the nail ball, an inflating agent is injected into the packer to expand the packer to seal the nail ball, and then a nail is installed by injecting a filler such as mortar into the nail ball. It is.

Therefore, according to the packer according to the prior art, since the mortar can not be injected into the nail hole until the expansion agent filled in the packer is solidified, the operation cannot be stopped until the expansion of the expansion agent is completed. In this case, by using the fast-expandable fastening agent as a fastening time can shorten the freezing time, the freezing time is shortened only because the freezing time is not frozen at the same time as the injection is stopped until the freezing time. That is, there is a disadvantage in that workability is lowered and production cost is increased because the operation of inflation agent and mortar injection, that is, two operations must be performed.

On the other hand, if the expansion agent is solidified at the same time as the injection, the freezing time is very short, so the work does not have to be interrupted, but because the rapid expansion agent is expensive, there is a disadvantage that the construction cost is expensive.

In addition, when the solidification time of the expansion agent is long, the slope must be urgently stabilized, so it is not applicable in the environment, which also has a disadvantage in that its utility is poor.

The present invention is to solve the above-mentioned conventional problems, when injecting a filler such as mortar into the nail hole, the filler is automatically performed by the injection operation of the filler without performing a separate operation to prevent the filler from leaking out of the nail hole It is an object of the present invention to provide a pressure nailing packer for stabilizing roads and slopes.

In addition, another object of the present invention is to be able to seal the nail ball without using an expensive expansion agent.

In order to achieve the above object, the road and only slope stabilizing pressure nailing packer according to the present invention is provided with one or more air discharge parts through which a mortar injection hose penetrates and discharges air in the nail hole in the ground. A spider which is fixed to the circumference of the nail to be sealed in close contact with the inner wall surface of the nail hole; And a valve plate having a plate shape through which the mortar injection hose penetrates and slidably mounted in front of the spider of the nail to push the spider toward the spider by the filling pressure of the mortar. .

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in Fig. 1 and Fig. 2, the road and only slope stabilizing pressure nailing packer 100 according to the present invention is coupled to the periphery of the nail 1 and the interior of the nail ball 2 (see Fig. 3a). It includes a spider 10 to be in close contact with the wall seals the nail ball (2), and a valve plate 20 to allow the spider 10 to be in close contact with the nail ball (2), each component will be described in detail below do.

The spider 10 is functionally mortar injection hose (3) must be penetrated and when the mortar (M) (see Fig. 3c) is injected into the nail hole 2, the air inside the nail hole 2 is external While having an air discharge portion discharged to the peripheral portion of the nail hole (2) should be in close contact with the inner wall surface, the concrete structure, the annular hub (11), hub (11) coupled to the outer peripheral portion of the nail (1) One side of the end portion is overlapped with each other while the radially formed fan-shaped sealing wings 12, the elastic wings to support elastically so as to open toward the inner wall side of the nail hole (2) radially foldable to the hub It consists of a member (not shown). That is, the spider 10 is supported so that the plurality of sealing wings 12 are always opened by the elastic force of the elastic member, the peripheral edge is in close contact with the inner wall surface of the nail hole (2) mortar (M) leaks to the outside It is sealed to prevent it.

Since the sealing blades 12 are thin plates, a gap may be generated between the peripheral edges of the nail holes 2 and the inner wall of the nail hole 2, so that the leakage of the mortar (M) may not be effectively prevented. In order to be bent in the horizontal periphery of the plurality of sealing blades 12 (where the horizontal is the state extending from the sealing blades 12 so as to be in surface contact with the inner wall surface of the nail hole 2) nail holes (2 It further includes a sealing portion 13 in close contact with the inner wall surface of the).

Spider 10 of such a structure is formed with a hose fixing hole 14 through which the mortar injection hose 3 and the air discharge portion 15 for discharging the air existing in the nail hole (2). For example, the air discharge portion 15 is formed in any one of the sealing wings (12). Here, reference numeral 19 in the drawings is an O-ring for fixing the mortar injection hose (3) fixed to the hose fixing hole (14).

Spider 10 having such a structure is made of synthetic resin, and is fixed to the circumference of the nail 1. When explaining the fixing structure, for example, the nail 1 has a plurality of annular projections (outer circumferences) on the outer circumferential surface thereof. The reinforcing bar 1a is formed, and the inner circumferential surface of the hub 11 is formed with an insertion groove 11a into which the projection 1a of the reinforcing bar 1 is inserted, thereby forming the projection 1a of the reinforcing bar 1 by the hub 11. The tie band 16 which tightens the hub 11 to the nail 1 side is wound on the sealing wing 12 side of the hub 11, and is inserted in the insertion groove 11a of the hub 11, and the hub 11 is free. The O-ring 17 is fitted to the outer periphery of the end side.

The valve plate 20 is slidably coupled to a space that is spaced forward from the spider 10 of the nail 1 and is pushed toward the spider 10 by the filling pressure of the mortar M, and is located between the spider 10 and the spider 10. The spider 10 is opened by the air pressure present, and is formed radially on one side of the annular sliding hub 21 and the sliding hub 21 slidably coupled to the circumference of the nail 1. The injection pressure of the mortar (M) is pushed toward the spider 10 side to press the sealing blades 12 of the spider 10 to be unfolded toward the inner wall surface side of the nail hole (2) and the air discharge portion of the spider 10 ( It may be composed of a pressing portion 22 to block the 15 to increase the pressure in the nail hole (2).

Since the valve plate 20 must move without interfering with the inner wall surface of the nail ball 2, the valve plate 20 has an outer diameter smaller than the inner diameter of the nail ball 2, and is preferably inserted into the finish part 13 of the spider 10. It has an outer diameter that can be. In the drawings, reference numeral 23 denotes a hose through-hole in which the mortar injection hose 3 slides while maintaining watertightness.

Only the valve plate 20 and the spider 10 configured as described above can seal the nail hole 2 by the filling pressure of the mortar (M), but the valve plate ( The sealant 30 of a flexible material may be coupled between the 20 and the spider 10.

Since the spider 10 is fixed to the nail 1 but the valve plate 20 is moved, the sealing material 30 is a material capable of sealing the nail hole 2 while being flexible, which can be folded freely by an external force. desirable.

The sealing material 30 is a length (not limited to any one value) in consideration of the moving distance of the valve plate 20, and the outer surface of the sealing portion 22 of the valve plate 20 and the sealing wing 12 It is fixed to the inner side, respectively. Spider 10 is that the sealing blades 12 are to be folded, it should be fixed so as not to interfere with the folding of the sealing blades (12).

The action of the road and only slope stabilizing pressure nailing packer according to the present invention configured as described above is as follows.

When the nail 1 is installed to stabilize the road and the slope, the process of inserting the nail 1 into the nail hole 2 after drilling the nail ball 2 is omitted. The following describes only the novel action according to the present invention.

(S10) Insert the nail (1). As shown in FIG. 1, the nail 1 combined with the packer 100 according to the present invention is inserted into the nail hole 2 as shown in FIG. 3a.

At this time, the spider 10 is folded to the nail 1 side by the holder 18 so that the sealing wings 12 of the spider 10 do not interfere with the inner wall surface of the nail hole 2. The holder 18 can be used to fold all the spider 10 can be used, for example, wire or tape (winding on the spider (10), after the installation of the nail 1 is broken by a cutter or the like, spider (10) To expand), a cylinder surrounding the spider 10 can be used. The mortar injection hose 3 is in the state fixed through the hose fixing hole 14 of the spider 10.

(S20) Spider (10) installation. When the holder 18 is removed after the insertion of the nail 1 is completed, the sealing wings 12 of the spider 10 are opened to the nail hole 2 side by the elastic force of the elastic member so that the sealing part 13 is a nail hole. It adheres to the inner wall surface of (2) (refer FIG. 3B). The sealing part 13 is in surface contact with the inner wall surface of the nail hole 2 so that a gap does not exist between the sealing part 13 and the inner wall surface of the nail hole 2.

(S30) Mortar (M) filling. When the mortar M is filled by injecting mortar M into the nail hole 2 through the mortar injection hose 3, the pressing unit 22 is pressurized by the mortar M so that the valve plate 20 is mortar ( The air inside the nail hole 2 is discharged to the outside through the air discharge unit 15 while gradually moving toward the spider 10 by the filling pressure of M). When the valve plate 20 moves and the mortar M is filled to the front of the spider 10, as shown in FIG. 3C, the valve plate 20 abuts on the inside of the spider 10 so that the air discharge unit 15 is blocked. In this case, when the inside of the nail hole 2 is sealed with the outside and the mortar (M) is continuously filled, the internal pressure increases, and the sealing wings 12 of the spider 10 are opened by this pressure to seal the sealing. The part 13 and the nail ball 2 are tightly sealed. As such, when the valve plate 20 and the sealing blade 12 are in contact with each other, the sealing material 30 is pressed between the valve plate 20 and the sealing blade 12, and thus, the illustration of the sealing material 30 is omitted in FIG. 3C.

Therefore, when the mortar (M) is filled in the nail hole (2), the spider 10 naturally seals the nail hole (2) by the filling pressure of the mortar (M) by injecting an expanding agent into the packer, as in the prior art, There is no need to stop working until this expanding agent is solidified.

As described above, according to the road and the slope stability pressure nailing packer according to the present invention, in order to inject mortar into the nail hole, the nail hole inlet must be sealed first, and the filling of the mortar without using a separate expanding agent By splicing the spider naturally due to pressure and sealing the nail ball, the construction period can be shortened because the inconvenience and time loss of stopping mortar filling until the expansion agent is solidified when the expansion agent is used are eliminated.

In addition, it does not use an expensive expansion agent, and because the structure is very simple, there is an effect such as to reduce the construction cost.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (6)

A spider having a mortar injection hose penetrated and fixed therein and having at least one air discharge part through which air in the nail hole is discharged is fixed to a circumference of the nail to be inserted into the nail hole, and the peripheral edge is in close contact with the inner wall surface of the nail hole. Wow; And, The mortar injection hose is slidably plated and slidably mounted in front of the spider of the nail is configured to include a valve plate for pushing the spider while pushing toward the spider by the filling pressure of the mortar Pressure nailing packers for road and slope slope stabilization. The method of claim 1, wherein the spider, Hub coupled to the outer periphery of the nail, a fan-shaped sealing blade radially formed so as to be foldable with respect to the hub while overlapping a portion at one end of the hub, the sealing blades toward the inner wall surface of the nail ball Slope pressure nailing packer characterized in that composed of an elastic member to elastically support to carry. The method of claim 1 or 2, wherein the spider, Road sealing and slope slope pressure nailing packer, characterized in that it further comprises a sealing portion is formed horizontally bent on the outer periphery of the plurality of sealing blades in close contact with the inner wall surface of the nail hole. The method of claim 3, wherein the valve plate, The sliding hub is slidably coupled to the circumference of the nail, the road is characterized in that it is radially formed on one side of the sliding hub and is pressed by the injection pressure of the mortar to press the pressure to expand the sealing plate and Slope pressure nailing packer. 5. The pressure nailing packer of claim 4, further comprising a sealant of a flexible material coupled between the spider and the valve plate to seal between the spider and the valve plate. The method of claim 5, wherein the nail is a reinforcing bar provided with an annular projection on the outer circumferential surface, the spider is formed on the inner wall surface of the hub is inserted into the groove is characterized in that the road is coupled to the nail and Slope pressure nailing packer.

Images