KR20030004187A - anchor-nail and anchor-nailing method for slope-reinforcement-construction - Google Patents

Abstract

PURPOSE: A nail anchor for a slope reinforcement work is provided to maximize tension-resistance of a nail structure and to anchor a nail easily. CONSTITUTION: The nail anchor for a slope reinforcement work comprises: a taper body(14) fitted to a reinforcing taper plane(12), adjoined a pressure thread(10) formed on the front end of a nail(1) to correspond to submission of tensile force; and an anchor body(18) provided with an anchor blade(16) extended by the movement of the taper body(14) by screwing on the pressure thread(10) and pressed/permeated into the inside of a perforated hole.

Description

Nail anchors for slope reinforcement and nail anchors for slope reinforcement {anchor-nail and anchor-nailing method for slope-reinforcement-construction}

The present invention relates to a nail anchor for slope reinforcement and its method, and more specifically, by applying the anchor method to the existing nailing method nailing method and the anchor method mutual complementary, nail according to its complement and synergistic effect The present invention relates to a nail anchor used for slope reinforcement and its method, which maximizes the tensile resistance of the structure and provides easy nail fixing and simplification.

In general, as the industry develops, it is inevitable to develop slopes such as mountain roads such as foundation roads and complexes, and the sliding reality of slopes is constantly occurring regardless of time and place. It acts as an element.

For this reason, the soil-nailing method is most widely used as a stabilization method for suppressing the collapse and sliding of the slope.

Soil nailing is a method of installing a reinforcing material (nail structure) on the ground to form a composite reinforcement ground while maximizing the strength of the ground, thereby increasing the shear and tensile strength of the ground to suppress displacement and prevent ground loosening to be.

In other words, the basic design concept of the soil nailing method is that the ingot of the area reinforced by the nail structure maintains stability on any slope that the reinforced earth wall can assume by acting as an integrated retaining wall. .

Exemplary Drawings Figure 1 is a cross-sectional explanatory view for explaining such a conventional nail structure and method, the nail structure is basically made of a reinforcing nail (1) and concrete grouting (2), here the shock concrete (not shown) The reinforcement wall by adding is made.

Soil nailing method using such a nail structure first excavate the slope, remove the foreign matter and then form a drill hole (3) by downward inclination, and in addition to the spacer (4) to secure the center of the nail hole (3) After inserting the nail into the grouting (2) filling solidification to form a nail structure in the drilling hole (3).

Next, a wire mesh (not shown) is installed using the acupressure plate 5 and the bolt 6, and shotcrete is poured into the wire mesh to form a reinforcing wall.

Such small nailing has been used for temporary earthquake structures, foundation burrows, etc., but in recent years, its application has been expanded to include slope reinforcement of roads, rock reinforcement of railways, dams, and tunnel shafts.

However, this small nailing is a combination of rock, which is designed to be useful for soil, and the rock structure of various slopes is different from soil, and the rock has a lot of joints, rock with many co-layers, and is thermally deteriorated under the influence of monolayer. Many slopes, such as rocks separated from the mother rock due to the development of discontinuities due to the blasting, are unstable in structure, so reinforcing the rock slopes using only existing nail structures has a problem that can be followed.

One of the biggest reasons is the nature of the nail structure itself.

That is, the nail structure, although grouting (2) is injected into the drilling hole (3) to be solidified, when viewed from the structure itself is only a simple insertion of the nail structure in the drilling hole (3).

Of course, a rock anchor structure for fixing the head in the perforation hole and fixing the rock by applying a tensile force to the rock slope reinforcement has been developed, but the structure is complicated and excessive construction cost is required, and the head of the rock anchor structure It is just a simple fitting in the hole.

In addition, the rock anchor structure is only possible downhill construction, it is difficult to perform the upward drilling, there is a limit in the adjustment of the insertion angle of the rock anchor structure according to the rock joint layer.

Even with the general small nails, upward perforation is difficult, which is due to limitations due to simple insertion and grouting of nails.

Exemplary drawing for explaining this in more detail Figure 2 is a cross-sectional explanatory view showing the difference between the downward construction and upward construction, the tensile force, shear force and bending to the nail structure (7) when the force to collapse (arrow) of the fracture fracture layer occurs The moment is generated.

At this time, the upward construction as shown in Figure 2a is to be able to arrange the nail structure 7 in the direction favoring the tensile force against the force to collapse.

As a result, when viewed as a nail structure 7 itself, the uplinked nail structure 7 is more advantageous than the downdraft, and further, the upward construction of the joint layer is freely inclined.

In this upward construction, a means for fixing the nail 1 is essential. Since there is no means for fixing the nail 1 in the existing small nailing method, the nail slides in the drilling hole 3 and thereby in the upward construction. It was difficult to install the nail structure 7.

In addition, because the lock anchor uses a steel wire, it was difficult to insert the head to the punching hole in the upward construction.

The pressure soil nail was developed to enable the upward drilling, and the pressure soil nailing was used to seal the inlet of the punching hole using a packer and to grout injection while fixing the nail.

However, such pressure soil nailing also does not escape the limitation of the soil nailing of a simple fitting combination, such as the injection of a chemical solution during the nail fixing and grouting injection by the packer and the formation of a discharge pipe for the discharge of air and foreign matter The problem is complicated structure and excessive construction cost.

In particular, the excessive demand of construction cost according to the complexity of the structure is a problem of the sub-construction, which is a problem to be solved in the present situation in Korea.

On the other hand, rock bolts having a structure similar to small nails have been developed as upward construction, which is to fix the nail tip to the rock by using a fastening liquid at the tip of the nail.

However, there was a problem that the pull resistance is weak and the length of the nail is followed.

On the other hand, the safety factor of the slope is known to be proportional to the tensile force of the nail structure, which is a reinforcing material acting on the base of the load surface, therefore it is important to secure the tensile force of the nail structure.

From this point of view, the nail structure showing the structure inserted into the perforation hole is showing a structural defect that it is not sufficiently utilizing the pull resistance compared to the input material, and the complement of the pull resistance of the nail structure was to be solved.

Accordingly, the present invention has been made in order to improve the above problems, by applying the anchor method to the existing nailing method to complement the nailing method and the anchor method, the tensile resistance of the nail structure according to its complement and synergistic effect The purpose of the present invention is to provide a nail anchor for slope reinforcement and a method for carrying out the simplification and simplification of the nail with ease.

The present invention for this purpose is to anchor the anchor body including the anchor blade supported in the drilling hole for reinforcement of the slope and the tapered body that is pressed into the nail to expand the anchor blade in the anchor body in the nail screw connection of the nail and anchor body The tapered body expands the anchor blade by the coupling force, so that the nail tip is fixed to the perforation hole (nevus) through the anchor body, and a post-process such as grouting is performed on the nail fixed in the perforation hole.

1 is a cross-sectional view illustrating a conventional nail structure and method;

2 is a cross-sectional conceptual view for explaining the difference between the downward construction and upward construction of the nail structure,

Figure 3 is a facility name showing the nail anchor according to the invention,

Figure 4 is a facility name showing the operating state of the nail anchor according to the present invention,

5 is an explanatory cross-sectional view showing an operating state of the nail anchor according to the present invention;

Figure 6 is a cross-sectional explanatory view showing the upward construction by the nail anchor according to the present invention.

-Explanation of symbols for the main parts of the drawings-

1-nail, 3-drill hole,

4-spacer, 5-pressure plate,

6-bolt, 10-pressure screw,

12-reinforcing tapered face, 14-tapered body,

16-anchor blade, 18-anchor body,

20-incision, 22-strain-guided neck,

24-support body, 26-inside taper,

28-through hole, 30-mating thread,

32-stopper face, 34-crust,

36-Grouting Injection Hose, 38-Air Discharge Hose,

Hereinafter, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. . Other objects, features, and operational advantages, including the purpose, working effects, and the like of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment, Various changes and modifications are possible within the scope without departing from the technical spirit of the present invention, as well as other equivalent embodiments will be found.

Exemplary drawings Figure 3 is a facility name showing the nail anchor according to the invention, Figure 4 is a facility name showing the operating state of the nail anchor according to the present invention, Figure 5 is an illustration of the nail anchor according to the present invention Explanatory cross-sectional view showing the operating state of

In addition, Figure 6 is an explanatory cross-sectional view showing the upward construction by the nail anchor according to the present invention.

According to the present invention, the pressing screw surface 10 formed at the tip of the nail 1 and the reinforcing taper surface 12 corresponding to the yielding of the tensile force adjacent to the pressing screw surface 10 are fitted to the reinforcing taper surface 12. Tapered body 14 and: the anchor blade 16 is compressed or penetrated into the inner circumferential surface of the drilled hole (3) while being expanded by the movement of the tapered body 14 by the screw coupling with the pressing screw surface (10). Slope reinforcement nail anchor consisting of the anchor body 18 is to be.

Here, the anchor body 18 is connected to the support body 24 via the deformation induction neck 22 is anchor blade 16 having a radial incision 20 to be expanded by the movement of the tapered body 14 In addition, the anchor blade 16 has a tapered inner surface 26 corresponding to the outer surface of the tapered body 14 and a through hole 28 through which the tip of the nail 1 penetrates so that expansion by the tapered body 14 is induced. On the other hand, the coupling screw hole 30 for coupling with the pressing screw surface 10 is formed in the center of the support body 24, and the expansion of the anchor blades 16 is limited on the outer circumference of the support body 24. The stopper surface 32 is formed, and the bottom of the support body 24 is fixed at the drilling hole 3 so that the rotation of the support body 24 is prevented and expansion of the anchor blade 16 is performed by screwing. It is characterized in that the assisting wedge 34 is formed.

On the other hand, the present invention provides an anchor body 18 having a stopper surface 32 for limiting the expansion of the anchor blade 16 while having an anchor blade 16 that extends radially, and in the hole 3 At the tip of the nail (1) to be inserted, a tapered body (14) extending the anchor blade (16) is inserted to screw the nail (1) and the anchor body (18) and the anchor body (14) by the screw coupling force. The anchor blade 167 is expanded by moving the taper body 1 so that the anchor blade 16 is pressed or penetrated into the hole 3 and the stopper surface 32 of the anchor body 18 coupled with the nail 1. It is a nail anchor method for slope reinforcement for slope reinforcement for performing the grouting, wire mesh installation and shockcrete, which is a post-process in the state in which the nail 1 is fixed to the birthmark by the anchor body 18.

As described above, the present invention by applying the anchor method to the existing nailing method to make the nailing method and the anchor method complementary, maximizing the tensile resistance of the nail structure according to its complement and synergistic effect and easy nail To provide a nail anchor and its method to perform the settlement and simplification of the method.

That is, the soil nailing has a problem of the nail structure itself, as described above instead of easy construction and low construction cost.

The anchor structure is responsible for the problems of the nail structure itself, by maximizing the pull-out resistance compared to the input material by the organic combination of the anchor structure and the nail structure, it is possible to work up the structure according to the geological structure, and to maintain a low construction cost .

The present invention for this purpose is to extend the anchor blade (16) and the anchor blade (16) in the anchor body (18) including the anchor blade (16) that is fixed to the drill hole (3) for use in the reinforcement hole drilling hole (3) The tapered body 14 is pressed into the nail 1 by inserting the taper body 14 into the nail 1 and the tapered body 14 expands the anchor blades 16 by the coupling force when the nail 1 and the anchor body 18 are screwed together. Through the anchor body 18, the tip of the nail (1) is to be settled in the drilling hole (nevus).

In more detail, the anchor blade 16 has a tapered inner surface 26, ie, a conical inner surface, which is aligned with the tapered body 14 based on a rod shape, and has a radially cut portion 20.

It also extends to the tapered inner surface 26 and has a through hole 28 for penetrating the nail 1.

The support body 24, which provides the support on which the anchor blades 16 are installed, is connected to the anchor blades 16 and the deformation guide neck 22 through the radial movement of the anchor blades 16 when the taper body 14 is moved. Induce expansion

In addition, the stopper surface 32 allows only proper expansion of the anchor blade 16 to prevent it from further bending backwards.

Here, the stopper surface 32 is tapered to provide an interference surface that provides a limit upon expansion of the anchor blade 16 and has an inclined surface opposite to the taper body 14.

On the other hand, since the anchor blade 16 is fixed between the tapered body 14, the support body 24, and the drilling hole 3, the deformation guide neck 22 may be succumbed, broken, or sheared.

That is, the strain inducing neck 22 does not affect the anchoring force of the anchor blade 16, and there is no fear that the anchor blade may be detached even when the strain inducing neck 16 is succumbed.

On the contrary, when the excessive tensile force is applied to the anchor blade 16 to dig the birthmark nail (1) is to be firmly fixed to the birthmark.

In this case, in the nail anchor according to the present invention, a reinforcing taper surface 12 is formed at the tip of the nail 1 to cope with a strong tensile force.

That is, the tapered surface at the tip of the nail 1 into which the tapered body 14 is fitted serves as a reinforcing surface as well as serving as a support surface for moving the tapered body 14 to the anchor body side when screwing the nail.

This is because if a chin is formed at the tip of the nail 1 simply to fit the tapered body 14, such a sharp boundary provides a yield point upon the application of strong tensile force, but the tapered surface, which is a natural connection, prevents this yield point. , Will act as a reinforcement surface.

On the other hand, the support body 24 is formed with a wedge 34, to prevent the rotation of the anchor body 18 during the rotation of the nail (1) to assist the screwing.

Therefore, the operator inserts the nail 1 into the drill hole 3 while the tapered body 14 and the anchor body 18 are coupled to the nail 1 tip, and then rotates the nail 1 while applying pressure. When the tapered body 14 is moved to the anchor body 18 by screwing, the anchor blade 16 is expanded, thereby anchoring the anchor body 18 to the drilling hole 3.

At this time, when the ground is installed soil is anchor blade 16 will penetrate into the drill hole (3) will be settled in the birthmark, if the ground is rock is anchor blade 16 is actually in the groove of the irregular drilling hole Will be compressed.

On the other hand, when the anchor blade 16 when pressing the wedge 34 is fixed to the inner surface of the irregular drilling hole 3 is to prevent the rotation of the support body 24 when screwing.

The nail structure according to the present invention is to provide a slope reinforcement structure different from the existing, by maximizing the pull-out resistance and a simple method by combining with the anchor structure.

In more detail, the biggest factor of slope stability is nail resistance of nail structure and is defined as about 10 tons.

In the design of the nail structure for the pulling resistance of 10ton, since the anchor structure is fixed to the birthmark and added tensile force, the nail structure of the present invention can obtain such a pull resistance even if much less material than the conventionally introduced material Will be

In addition, the doubling of the pullout resistance when the same material is added is a natural result.

On the other hand, the anchor structure is excellent in the application to the rock, because when the anchor body 18 is fixed to the mother arm is because the hair holding the load of the peripheral fracture zone through the nail (1).

In particular, the present invention serves to improve the difficulty of upward construction.

That is, since the tip of the nail 1 is fixed to the birthmark, it is not necessary to install a packer for fixing the nail according to the upward perforation and a complicated structure accordingly.

Therefore, by simply injecting grouting through the grouting hose 36 while closing the inlet of the drilling hole, and discharging air through the air discharge hose 38, upward construction is possible by simple construction, and the reason for this is as described above. Likewise, the nail 1 is based on the fixation on the birthmark.

According to the present invention as described above, by installing an anchor on the nail tip for slope reinforcement to allow the nail to be fixed to the birthmark by combining the nailing method and the anchor method, the tensile resistance of the nail structure is maximized by a simple construction and to the anchor This has the effect of superior application to rock.

In addition, in the process, only a simple construction for installing the anchor by rotating the nail in the existing small nailing method is added, the construction is easy, there is an effect that the upward construction is easy.

Claims (3)

The pressing screw surface 10 formed at the tip of the nail 1 and the reinforcing taper surface 12 adjacent to the pressing screw surface 10 corresponding to the yielding of the tensile force and the taper body fitted to the reinforcing taper surface 12 ( 14) and: an anchor body including an anchor blade 16 that is compressed or penetrated into the inner circumferential surface of the drilling hole 3 while being expanded by the movement of the tapered body 14 by screwing the pressure screw surface 10. Slope reinforcement nail anchor consisting of (18). The anchor body (16) of claim 1, wherein the anchor body (16) having a radial incision (20) is expanded by the movement of the tapered body (14) through the deformation guide neck (22). In addition, the anchor blade 16 has a through hole through which the tapered inner surface 26 and the tip of the nail 1 penetrate to the outer surface of the tapered body 14 so that expansion by the tapered body 14 is induced. While the 28 is formed, a coupling screw hole 30 for coupling with the pressing screw surface 10 is formed at the center of the support body 24, and an anchor blade 16 is formed at the outer circumference of the support body 24. The stopper surface 32 is formed to limit the expansion of the hole, and the bottom of the support body 24 prevents the rotation of the support body 24 so that the expansion of the anchor blades 16 by screwing is performed. Slope reinforcement nail anchor, characterized in that the wedge protrusion (34) is formed to assist in the fixing. A nail (1) having an anchor blade (16) extending radially and having an anchor body (18) having a stopper surface (32) for limiting the expansion of the anchor blade (16), and inserted into the drilling hole (3) The tapered body (1) in the anchor body (14) by screwing the nail (1) and the anchor body (18) and the screw coupling force by inserting the tapered body (14) extending the anchor blade (16) at the tip By expanding the anchor blade 167 by movement, the anchor blade 16 is pressed or penetrated to the outside of the drilling hole 3 and by the stopper surface 32 of the anchor body 18 coupled with the nail 1. Slope reinforcement nail anchor construction method for performing the grouting, wire mesh installation and shockcrete, etc., which is a post-process in the state in which the nail (1) is fixed to the birthmark by the anchor body (18) by being supported.