KR200205781Y1 - Nail assembly for removable soil nailing method - Google Patents

Abstract

The present invention relates to a nail assembly for a removable soil nailing method, and more particularly, by inserting a nail, which is a general deformed bar, into the ground horizontally or vertically as a reinforcing material in reinforcing reinforcement slope stabilization method for excavating slopes and foundations of buildings. By introducing prestress into the ground, the shear strength of the original ground is improved to integrate the entire soil wall reinforced by nail as a reinforcement material. The present invention relates to a nail assembly for a removable small nailing process that enables a more economical and safe construction and reduces post-use nails by reducing the interval and length of nails.

Description

Nail Assembly for Removable Soil Nailing Process {NAIL ASSEMBLY FOR REMOVABLE SOIL NAILING METHOD}

The present invention relates to a nail assembly for a removable soil nailing method, and more particularly, by inserting a nail, which is a general deformed bar, into the ground horizontally or vertically as a reinforcing material in reinforcing reinforcement slope stabilization method for excavating slopes and foundation By introducing prestress into the ground, the shear strength of the original ground is improved to integrate the entire soil wall reinforced by nail as a reinforcement material. The present invention relates to a nail assembly for a removable small nailing process that enables a more economical and safe construction and reduces post-use nails by reducing the interval and length of nails.

In general, in the case of constructing the structure on the basement or slope of the building, the stabilization work is performed to stabilize the slopes and vertically excavated slopes, such a conventional shovel construction, such as thumb pile, cross-stack pile, sheet pile (sheet pile) This method uses a large punching equipment, but the noise and vibration associated with installing piles are a problem, and the props narrow the construction space, making it difficult to transport Gultotosa. The earth anchor construction method was easy for the gulting work itself, but the construction time was long and the length of the anchor was very long.

Therefore, in recent years, the soil nailing method is widely used. This soil railing method is a rebar as a reinforcing material as a reinforcement along with the excavation step by step during the underground excavation of a slope or a building as described above. Or the concrete facing) to reinforce the excavation slopes and use the lightweight equipment to install the earthquake, so that the excavation work can be carried out with low noise and low vibration, and also the drilling depth (depth of depth) for the reinforcement area compared to the earth anchoring method. As it is very short, it is a very advantageous construction method for urban construction such as minimizing the occurrence of disputes due to the invasion of the border between adjacent lands.

As described above, by reinforcing the soil using reinforcement (deformed reinforcing bar) to withstand tensile and shear forces in cut slopes, the reinforcement ingots form an integrated block to function as a gravity retaining wall as a soil wall. Soil nailing method to keep the cut slope stable by forming a structure using the soil itself reinforced with nails can build a retaining wall with high stability. It is effective in the terrain, easy to construct and low noise and vibration during work, so it is not only possible to construct near the residential area, but also has high resistance to the movement of the surrounding ground such as earthquake, so it is safe and depending on the type of soil in the construction that involves cutting By setting the slope, it is safe and the land use area can be increased to increase the use of the land and to preserve the surrounding environment. It is possible.

However, in spite of these many advantages, the installation of nails, which are deformed rebars in the ground, is a situation in which an inevitable invasion of adjacent lands of others occurs.

In this case, the nails installed in the ground need to be removed after use, but it was difficult to carry out on-site construction because there is no proper method.

That is, a method of manufacturing the nail assembly by screwing and removing the nail by rotation has been developed, but this is the inner (drive area) and the outer (passive area) of the critical active surface (virtual fracture surface) generated by excavation as shown in FIG. Due to the earth pressure acting on the nail, the nail is deformed into the S-shape, so it is impossible to remove the nail by rotation with a screw, and thus it is not performed at the time of construction.

The present invention has been devised to solve the above problems, by introducing a prestress to the nail reinforcement that needs to be removed after use as described above to generate a compressive force in the ground to resist earth pressure to move in the direction of gravity due to excavation wall surface Excavation work is safely carried out by reducing the displacement, ie horizontal displacement, which is moved to the front of the surface. It is an object of the present invention to provide a nail assembly for a removable small railing method that is easy to remove after use with stability.

1 is a view for explaining the principle of deformation of the nail by earth pressure;

Figure 2 is a cross-sectional view of the nail assembly according to an embodiment of the present invention,

3 is a cross-sectional view of the nail assembly according to another embodiment of the ball design,

Figure 4 is a cross-sectional view of the nail assembly according to another embodiment of the present invention,

5 is a cross-sectional view of the nail assembly according to another embodiment of the present invention,

6A to 6K are cross-sectional views showing the construction procedure of the construction method according to the present invention.

<Explanation of symbols for main parts of drawing>

1: cut slope, 2: insertion hole, 3: nail assembly, 4: nail, 5: load bearing assembly, 6: compartment tube. 7: primary grouting hose, 8: secondary grouting hose, 9: spacing material, 10: primary grouting material, 11: faceplate, 12: hydraulic jack, 13: anchorage, 14: main structure, 15: space , 16: secondary grouting inlet, 17: secondary grouting material, 18: adhesive, 20: inner body, 20a: connector, 20b: coupler, 22: reinforcing bar for load distribution, 24a, 24b: connector, 26: 2 Primary grouting connector, 28: Linear screw, 30: Cutting guide groove, 32: Receptacle

Hereinafter, the present invention will be described with reference to the accompanying drawings, FIGS. 2 to 6.

2 is a cross-sectional view of the nail assembly according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the nail assembly according to another embodiment of the present invention, Figure 4 is a nail assembly according to another embodiment of the present invention 5 is a cross-sectional view of the nail assembly according to another embodiment of the present invention, Figure 6a to 6k is a cross-sectional view showing the construction procedure of the construction method according to the present invention.

Looking at the basic configuration of the present invention first, the nail assembly (3) used in the present invention is a compartment tube with a load-bearing assembly (5) is assembled to the tip of a predetermined length of the nail (4) and the wrinkles formed on the outer surface of the nail (4) (6) is inserted and installed, the primary grouting hose (7) is installed on the outside of the compartment 6 and the secondary grouting hose (8) is installed so as to communicate with the inside of the compartment (6). .

Hereinafter, the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

Here, Figure 2 is a case of using a threaded deformed reinforcing bar as the nail (4), Figure 3 is a nail (4) using a deformed reinforcing bar for general structure, but screwed to the load-bearing body 20 when connected to the load-bearing assembly (5) 4 is a case of using the general structural deformed steel rebar as a nail (4) but screwed to connect with the load-bearing assembly (5).

The load-bearing assembly 5 is assembled to the tip of the nail 4 having a predetermined length such as general deformed reinforcing bars, and the nail 4 is formed with a corrugated pipe 6 having a wrinkled pipe or iron sheath pipe on the outer surface thereof. The nails 4, the load-bearing assembly 5 and the end portions of the compartment tube 6 are sealed with a sealing material, and the length of the nail 4 is approximately the length of the nail 4 outside the compartment tube 6 in a sealed state. The primary grouting hose (7) is installed and the secondary grouting hose (8) is inserted into the compartment pipe (6) to produce one nail assembly (3).

At this time, the load-bearing assembly (5) is a connector (20a) and the coupling member formed with a screw thread to be coupled to the thread of the nail (4) in the inner periphery of the nail, as shown in Figure 3 The connector tube 24b is extrapolated to the connector 20a of the inner body 20 in which the body 20b is integrally formed, and a part of the connector tube 24b is extrapolated to the compartment tube 6 and the connector tube 24b There is formed a secondary grouting connector 26 in communication with the secondary grouting hose 8.

At this time, by inserting the load-distributing reinforcing bar 22 into the coupler (20b) to distribute the load concentrated on the load body 20 when the pre-stress is introduced, which is the length adjustment or installation depending on the site, such as the surrounding soil conditions You can choose.

As shown in FIG. 4, when the nail 4 is a general deformed rebar, a thread is formed on the inner and outer circumferences of the connector 20a so that the nail 4 is wound on the inner circumference of the connector 20a using the linear screw 28. And extrapolating the connector tube 24a to the connector 20a and the compartment tube 6, and the other connector tube 24b is extrapolated to the connector tube 24a and the compartment tube 6, and the nail 4 In the cutting guide groove 30 is formed.

At this time, the receiving pipe 32 is formed in the connecting pipe 24b so that the linear screw 28 remains in the receiving part 32 upon detachment. In order to distribute the load concentrated on the load bearing body 20 when the prestress is introduced.

In addition, in the case where the nail 4 is a general deformed rebar as shown in FIG. 5, a screw thread is formed at the tip of the nail 4 and a screw thread is coupled to the inner and outer circumferences of the connector 20a to connect the connector 20a. And nail 4 and extrapolate connector 24a to the connector 20a and compartment tube 6, wherein another connector 24b is connected to connector 24a and compartment tube 6. Extrapolated, the receiving portion (32) is formed in the connecting pipe (24b).

At this time, by inserting the load-distributing reinforcing bar 22 in the coupling sphere (20b) to distribute the load concentrated on the load bearing body 20 when the prestress is introduced.

If the reverse rotation is possible by making the cast body 20 of Figs. 2 to 4 and the reverse rotation is possible, remove the nail 4, otherwise the tension is introduced to the head of the lower body 20, the tension is The nail 4 is removed while being transferred to the inner body 20 or the linear screw 28 and crushed or broken.

In another embodiment, as shown in FIG. 5, the tip portion of the nail 4 is directly adhered to the primary grouting material 10 without covering the compartment tube 6 to withstand the introduction of the prestress by the adhesive force alone. End of the) is sealed with an adhesive 20 and a tape and the cutting guide groove 30 is formed in the nail (4) to remove the nail (4) only by the tension by the hydraulic jack 12, without removing the screw. have.

On the other hand, as shown in Figure 6a, for example, applying the nailing method in a state in which the nail assembly 3 is assembled as follows.

When the cut slope 1 to be constructed is determined, the insertion hole 2 having a diameter of about 75 mm to 150 mm in size is about 2 to 15 m depending on the height of the excavation according to the ground conditions as a perforator from the top of the cut slope 1 as shown in FIG. 6B. Formed perforated to depth.

The nail assembly 3 is inserted into the insertion hole 2 formed as shown in FIG. 6C, wherein the nail 4, which is a reinforcing material constituting the nail assembly 3, and the hoses 7 and 8 for the primary and secondary grouting are made. The end of the) is inserted and installed to be exposed to the outside of the insertion hole 2 by a predetermined length.

When the insertion of the nail assembly 3 is completed inside the insertion hole 2, first, the bottom surface of the nail assembly 3 is formed through the primary grouting hose 7 in the empty space between the inside of the insertion hole 2 and the outside of the partition tube 6. From the cement milk (cement milk) or cement mortar (cement mortar) to fill the primary grouting material (10) by filling the remaining space except the inner space of the compartment pipe (6) to cure for a certain time.

Thereafter, as shown in FIG. 6d, the front plate 11 is installed by sealing it with shock concrete or concrete in a state in which a welded wire mesh or reinforcing bar is installed in the front opening of the insertion hole 2.

At this time, the end of the nail (4) and the secondary grouting hose (8) is a predetermined length of the front plate 11 is installed in a state that is exposed to the outside of a predetermined length, a separate prestressing hydraulic jack 12 as shown in Figure 6e ) Is installed on the nail 4 exposed to the outside of the front panel 11 by a predetermined length, and the prestress is introduced to the nail 4 by biting and pulling the nail 4 in a range below a certain pressure and simultaneously pushing the fixing unit 13. Done.

In this case, when the nail 4 is a threaded rebar, the prestress is introduced by tightening a nut installed on the front side of the hydraulic jack 12 while pulling the nail 4 at a constant tension with the hydraulic jack 12.

6F after the removal of the nail 4, which will be described later as shown in FIG. 6F, or after the removal of the nail 4 as shown in FIG. 6G, the main structure 14 is installed. Install the structure (14).

In the case of FIG. 6F, the nail 4 is removed by a predetermined length as in FIG. 6H, and in the case of FIG. 6G, the nail 4 is removed by a certain length as in FIG. 6I.

At this time, the nail 4 can be removed by rotating the screw to remove the nail 4 by rotating it, and by removing the nail 4 by the principle of FIG. Remove the nail (4) by pulling it under the pressure of 12).

When the nail 4 is pulled out, the load on the lower body 20 is increased, and thus, the lower body 20 manufactured by casting is crushed or damaged to remove the nail 4, but in the case of FIG. 4 is likely to be cut in the guide groove 30, and in the case of FIG.

When the nail 4 is removed by a predetermined length, as shown in FIG. 6J, and when the whole is removed, the secondary grouting inlet 16 is exposed to the front plate 11 side as shown in FIG. 6K, and the secondary grouting hose 8 and the second grouting connector are shown. A removable small rail using prestress for any cut slope 1 by filling the space 15 inside the compartment 6 in which the nail 4 is removed through the 26 with the secondary grouting material 17. One nail 4 installation work by the ring method is completed.

Reference numeral 9 is a spacer for maintaining a gap between the hoses 7, 8 and the partition tube 6 and 18 is an adhesive for sealing.

As the nail assembly according to the present invention is repeated the soil nailing method, the cut slope (1) is provided with a plurality of removable nails (4) introduced with a prestress at a predetermined interval so that the reinforced ground is the whole soil To form a soil retaining wall using local ground, such as a gravity retaining wall with a companion, it is possible to install a nail (4) that can maintain the excavation surface and can be removed after use.

As described above, although the present invention has been described with reference to the above embodiments, it is not necessarily limited thereto, and various modifications may be made without departing from the scope and spirit of the present invention.

As can be clearly seen from the above description, according to the nail assembly for the removable small railing method of the present invention, the prestress is introduced to a nail inserted into a cut slope in the existing small railing method. By improving the overall shear strength of the base itself, the axial tensile force generated from the nail made of the deformed reinforcing bar acts as the main resistance for the stability of the wall, minimizing the expected ground displacement during or after construction and at the same time economically It can maintain a stable state and at the same time provides a useful effect, such as to facilitate the removal of removable nails that need to be removed after use.

Claims (4)

The load-bearing assembly 5 is assembled at the tip of the nail 4 of a predetermined length, and a partition tube 6 formed with wrinkles is installed on the outer surface of the nail 4, and the first grouting is provided outside the partition tube 6. Removable nail nailing nail assembly, characterized in that the hose (7) is installed and the secondary grouting hose (8) is installed in communication with the inside of the compartment (6). The connector of claim 1, wherein the load-bearing assembly (5) is connected to the screw thread of the nail (4), and the connector of the load-bearing member (20) having a threaded connector (20a) and a connector (20b) integrally formed thereon. A part of the connector tube 24b is extrapolated to 20a, and the connector tube 24b is removable so that the secondary grouting connector 26 is formed in communication with the secondary grouting hose 8. Nail assembly for nailing method. The connector of claim 1, wherein the load-bearing assembly 5 includes a connector 20a and a connector 20b integrally formed with the linear screw 28 so that the tip portion of the nail 4 is screwed together. 20a) a screw thread is formed on the inner and outer circumferences, and a part of the connector tube 24a is extrapolated by screwing to the connector 20a, and the connector tube 24a is a secondary grouting in communication with the secondary grouting hose 8 A nail assembly for removable soil nailing process, characterized in that the connector (26) is formed and another connector (24b) is extrapolated to a part of the connector (24a). The connector 20a of claim 1, wherein the load-bearing assembly 5 is integrally formed with the connector 20a and the coupler 20b so as to be mated with a screw thread formed at the distal end portion of the nail 4. A screw thread is formed on the inner and outer circumferences, and a part of the connecting pipe 24a is extrapolated to the connector 20a by screwing, and the connecting pipe 24b is connected to the secondary grouting hose 8 and has a secondary grouting connector ( 26) A nail assembly for removable soil nailing process, characterized in that the formation of the connector (24a) and the other connector (24b) is extrapolated.