KR20210056292A - Prestressing Steel ancher nail method - Google Patents

Abstract

The present invention relates to a nail anchor structure using a prestressing steel (PS) stranded wire, and more particularly to a nail anchor structure using a PS stranded wire in which an anchor body is stably positioned in the center of an anchor anchorage section consisting of a stranded wire, a rope-shaped steel bar and a coupler, and a reinforcement tool for increasing shear and tensile force is provided to increase an anchorage fixing force of the anchor anchorage section, thereby significantly increasing a ground reinforcement efficiency. In addition, the nail anchor structure using a PS stranded wire is easy to manufacture and a distinction between free and fixed lengths, which are directly related to the quality of anchor products, is clear to facilitate quality control. The present invention includes a steel pipe nail part and an anchor fixing part.

Description

Nail anchor structure using PS stranded wire {Prestressing Steel ancher nail method}

The present invention relates to a nail anchor structure using a PS (Prestressing Steel) strand, and more specifically, an anchor body is stably located in the center of an anchor fixing unit composed of a stranded wire, a rope-shaped steel bar, and a coupler, thereby increasing shear and tensile force. By providing a reinforcing tool for anchoring, it is possible to remarkably increase the ground reinforcement efficiency by increasing the anchoring and fixing power of the anchoring part. It is easy to manufacture, and the distinction between the free book and the anchoring book, which is directly connected to the quality of the anchor product, is sure to facilitate quality control. It relates to a nail anchor structure using PS(Prestressing Steel) stranded wire.

As the industry develops, it is inevitable to develop steep slopes such as mountain areas by building complexes, new towns, or roads and railroads. Therefore, the use of land is increased and the stability and comfort of residential complexes are secured, while constructability, economic feasibility and environment There is a demand for the establishment of a slope stability countermeasure method that can satisfy integrity.

In general, it is inevitable to develop slopes such as mountain areas for foundation roads or complex construction. However, if the slope is not properly reinforced, it will collapse and threaten life and property.

Therefore, for this reason, the slope reinforcement method is being performed as a stable method for suppressing the collapse or sliding of the slope. According to the public purpose, it is divided into various types, such as an activity reduction method, a resistance strengthening method, and a surface protection method.

The conventional ground anchor structure is applied to the construction method for reinforcing the ground, and in particular, it is applied as a pretension method, and an assembly formed by integrally connecting a tension member and a reinforcing member in a perforated hole drilled at a certain depth in the ground. The grouting treatment is made by inserting.

And after grouting, the part protruding out of the ground of the tension member is fixed through a tension member fixing device to finish. At this time, the tension member and the reinforcement member align one or more steel wires in the longitudinal direction and twist them in a "-" shape. It is provided as a PS stranded wire that is formed to extend the length.

The ground anchor structure using PS stranded wire according to the prior art as described above uses a covering material such as a protective cover among the reinforcement and tension members, and the reinforcement part is exposed to grout, so that the tension member and the reinforcing member are divided into a sealing material, such as a silicone material. , There is a problem that micro-cracks such as progressive cracks occurring in contact with the grout material and non-contact portions occur.

In addition, there is a problem in that it is not easy to manage the amount of stretch of the tension member, and the fixing power of the fixing fixing unit is lowered due to microcracks, etc., and thus the ground reinforcement efficiency is lowered.

Therefore, by introducing the concept of pretension, prestress is applied to the nail body, thereby increasing the safety factor of the slope by inhibiting the active force and displacement in advance, and by applying prestress to the grout, it is possible to suppress micro-cracking and shear resistance. The development of this excellent soil nail structure is urgently needed.

The present invention has been proposed to solve this problem in view of the above problems, the object of the present invention; Nail anchor using PS stranded wire, which can significantly increase ground reinforcement efficiency by increasing the anchoring fixing power of the anchor fixing part, and making it easy to manufacture, and making the distinction between the anchor fixing part and the free ledger directly connected to the quality of the anchor product is reliable. Its purpose is to provide a sieve.

The present invention for solving the above problems is a steel pipe nail permanent anchor body consisting of a steel pipe nail part, an anchor free book part, and an anchor fixing part, and a PS strand made by twisting 6 to 7 strands of PS (Prestressing Steel) strands with low tensile stress. A multi-composite PS strand made of 7 to 19 strands is used, and the outer surface of the PS strand is coated with polyethylene resin and a rope-shaped steel bar, and it is composed of a dual method to receive a uniform compressive force over the total length of the compression type anchor body. Since cracks do not occur, the effect of grout can provide a perfect anchor body.

The present invention is to provide a coupler and a reinforcing tool in the anchor fixing portion to protect the tip and to increase the shear force and the tensile force.

The nail anchor structure using PS stranded wire according to the present invention is capable of preventing corrosion of the anchor body by completely blocking water or harmful substances by covering the outer surface of the steel pipe nail part and the anchor fixing part once again. It works.

The present invention provides a coupler and a reinforcing tool in the anchor fixing part to protect the tip, stably positioning the anchor body in the center, and providing a reinforcing tool for increasing shear and tensile force, thereby increasing the anchoring fixing power of the anchor fixing part and remarkably improving the ground reinforcement efficiency. It has an effect that can be increased.

In addition, it has the effect of ensuring the same and stable tensile strength of the stranded wire required during construction.

Therefore, it has the effect of preventing the collapse of soil or rockfall from the rock wall.

1 is a cross-sectional view of the present invention. Figure 2 is a cross-sectional view of the PS strand of the present invention. Figure 3 is a schematic diagram of the construction state of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to elements of each drawing, it should be noted that the same elements are to have the same numerals as possible even if they are illustrated in different drawings.

In addition, in the following description of the present invention, when it is determined that a detailed description of related known functions and configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, terms to be described later are terms set in consideration of functions in the present invention, and since these may vary according to the intention or custom of the producer, the definition should be made based on the contents throughout the present specification.

1 is a cross-sectional view of the present invention, Figure 2 is a cross-sectional view of the PS strand of the present invention. Figure 3 is a schematic diagram of the construction state of the present invention.

First, a nail anchor structure using a PS strand according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

1 to 3, the nail anchor structure using the PS stranded wire according to the first embodiment of the present invention is a steel pipe nail part 100 for tensile work by protruding from the perforated part perforated in the ground, the steel pipe An anchor free-standing part 200 integrally extended to the nail part 100 to receive a compressive force, and an anchor fixing part 300 formed integrally with the free anchor 200 and having a free length of the entire anchor. It is a configuration that includes.

The above-described anchor structure uses a multi-composite PS strand 10 made by twisting PS strands of 6 to 7 strands of PS (Prestressing Steel) strands of low tensile stress into 7 to 19 strands again, and the outer surface of the PS strands The polyethylene resin coating material 20 and the slide pipe 30 are coated and compressed in a dual manner to receive a uniform compressive force over the entire length of the compression-type anchor body.

After inserting the covering material 20 and the slide pipe into the tip of the PS strand constituting the steel pipe nail part 100, the cover material 20 and the slide pipe are inserted, and the outer surface of the slide pipe is configured to have high waterproofness by compressing it in a double manner. The mansion part 34 and the nut 32 are fixed to protrude to the outer front of the anchor plate mounted on the outer surface of the perforated part, and the fixing end and the stopper are combined to the back of the anchor plate to finish with a water-stop tube. It is processed and composed.

The free anchor length unit extended integrally with the steel pipe nail to receive a compressive force, the covering material and the slide pipe are compressed twice to receive compressive force over the entire length of the grout, so that no cracking occurs, and the effect of the grout is perfect.

The anchor fixing unit integrally formed with the anchor free book is double-compressed with the covering material and the slide pipe, the fixing agent 50 is further covered, and only the lower part where the spacer 54, the coupling 56, and the reinforcing tool 52 are combined. It is made up of Shaunbu.

The reinforcing tool described above is combined in a manner using a coupling and a nut, and as well as increasing the shear force and tensile force (pulling force) of the nail, the nail is stably located in the center of the perforated hole, and the fixing part is a compression type, so no cracks in the grout occur. It is to prevent corrosion of the.

In the present invention, the free field is extended to the tip of the anchor fixing portion, so that progressive destruction is not caused, and there is no reduction in tensile force by maximizing the constraining stress.

When explaining the manufacturing process and construction process of the anchor body of the present invention, first, a multi-composite PS strand made by twisting 6 to 7 PS (Prestressing Steel) strands of low tensile stress into 7 to 19 strands again is used. Thus, the multi-strand wire is coated with a polyethylene resin covering material and a slide pipe, and the coated strand is wound and then compressed to produce an anchor body, and the manufactured anchor body is brought into the site and inserted into the perforated hole for use.

The anchor body according to the present invention can suppress or reduce the displacement movement of the excavation surface by compressing or tensioning the PS strand to offset the tensile stress on the pipe friction tube, and allowing the displacement of the excavation surface acting on the ground to act inward. .

The present invention is not limited only to the above-described embodiments, but can be modified and modified within the scope not departing from the gist of the present invention, and the technical idea to which such modifications and modifications are applied should also be regarded as belonging to the following claims. .

10: PS stranded wire

Claims (3)

A steel pipe nail part 100 for tensile work by protruding from the perforated part perforated in the ground, an anchor free book part 200 integrally extended to the steel pipe nail part 100 to receive a compressive force, and the anchor free book part 200 An anchor structure consisting of an anchor fixing part 300 that is integrally formed with the anchor and the entire length of the anchor is made of a free field, and the anchor structure is a PS made by twisting 6 to 7 strands of PS (Prestressing Steel) strands with low tensile stress. PS stranded wire consisting of a dual method in which a multi-composite PS strand (10) made by twisting the strands into 7 to 19 strands again is used, and the outer surface of the PS strand is coated and compressed with a polyethylene resin covering material (20) and a slide pipe (30). In the nail anchor structure using the anchor fixing part 300, the covering material 20 and the slide pipe 30 are double compressed, so that the fixing agent 50 is further covered, and the fixing agent 50 is coupled Using a PS stranded wire, characterized in that the reinforcing tool 52 is connected and coupled in a manner by nut coupling in (56), and the lower mansion portion is coupled to the spacer 54 on the outer surface of the fixing agent 50. Nail anchor structure. The method according to claim 1, wherein a covering material (20) and a slide pipe are inserted at the tip of the PS strand constituting the steel pipe nail part (100), and then compressed in a double manner to provide high waterproofness, and the slide pipe The outer surface of the PS strand is configured to protrude to the outer front of the anchor plate mounted to the outer surface of the perforation by fixing the upper mansion part 34 and the nut 32 to the tip of the PS strand. Nail anchor structure using PS strands, characterized in that the stopper is combined and finished with a water-stop tube. The method of claim 1, wherein the anchor fixing part integrally formed with the anchor free book is double-compressed with a covering material and a slide pipe, and is further covered with a fixing agent (50), and a spacer (54), a coupling (56), and a reinforcing tool (52). Nail anchor structure using PS strands, characterized in that consisting of a lower manshon portion coupled to ).

Images