KR101322122B1 - Connection Apparatus of Steel Pipe for Strut, Steel Pipe Strut Using Thereof and Method of Constructing The Steel Pipe Strut - Google Patents

Abstract

The present invention is a friction joint type steel joint for connecting the steel pipe and the steel pipe joints, to provide a constant position between the steel pipe to secure a uniform bending performance, the steel pipe fittings, steel pipe braces and construction methods thereof A first ring plate surrounding a circumferential one side outer surface of a pair of steel pipe opposing ends positioned on the same line, and each having a first coupling piece bent to extend at both ends of the circumferential direction; And a second ring plate surrounding the outer circumferential side of the steel pipe opposing end portion, the second ring plate being bent at both ends of the circumferential direction to be formed so that the second coupling piece corresponds to the first coupling piece, respectively. As the coupling means is coupled to the coupling piece and the second coupling piece of the second ring plate, the inner surfaces of the first ring plate and the second ring plate adhere to the outer surfaces of the pair of steel pipes, and the first ring plate and the second ring plate are coupled to each other. At least one of the ring plates includes reinforcing protrusions defining the position of the steel pipe on the inner surface of the longitudinal center, wherein the reinforcing protrusions are formed along the inner surface of the first ring plate or the second ring plate and spaced in the longitudinal direction. A plurality of reinforcing members positioned and the first ring plate in the space between the reinforcing members to prevent the inserted steel pipe from being rolled up by the weld bead. The steel ring fitting for the reinforcement, characterized in that it comprises a welding portion for fixing the position of the reinforcement with respect to the second ring plate and a steel pipe support including the same, proposes a construction method using the same.

Description

Connection Apparatus of Steel Pipe for Strut, Steel Pipe Strut Using Thereof and Method of Constructing The Steel Pipe Strut}

The present invention is installed between the earthen wall facing each other during the excavation work for a steel pipe reinforcement for connecting the brace made of steel pipe to support the earthen wall during the excavation work, and the construction method of the steel wall support for the earthenware wall using the same and the construction method will be.

In general, the ground is excavated to build the foundation, basement, or concrete wall of the construction site, the earthquake is carried out to prevent the collapse of the excavation surface by earth pressure.

The earthquake construction can be largely divided into the earthquake wall construction and the support material construction to prevent the collapse of the earthquake wall during excavation work.As the earth wall, any one of a thumb pile + earth plate, a steel sheet pile, and a concrete underground continuous wall is used as a support material. Is selected from one of braces, ground anchors and small nails in consideration of the ground conditions, site conditions and economic feasibility.

The earthquake construction using the thumb pile + earth plate as the earth wall and the support beam as the support material is the most widely used, and the earthquake work is the earth plate to support the excavation surface between the H-beams (thumb piles and mother piles) installed on the ground at predetermined intervals. Insert the earthquake wall by inserting it, and then excavate it to a certain depth, install a band on one side of the H-beam, and install the bracing between the bands facing each other to support the wall, and then carry out the excavation, strip and bracing installation process. The construction will be completed repeatedly. Here, the buttress is commonly used H-shaped steel, but in order to overcome the shortcomings of the H-shaped steel whose stability is determined by the buckling load, the steel pipe with excellent stability for the entire brace system is also used.

In the case of the brace using the steel pipe, the steel pipe and the steel pipe are welded before the ground excavation to support the retaining wall, or it is installed to support the retaining wall by connecting the bolts with a flange between the steel pipes.

However, when the steel pipe is dismantled after the completion of construction, the support of conventional steel pipes causes damage to the joints between the steel pipes, or the welding construction of the steel pipe joints and the joints. There was.

As a background technology of the present invention, there is a patent registration No. 838736 "Steel pipe joint device and coupling device for braces" (Patent Document 1). In the background art, in order to solve the above problems, as illustrated in FIGS. 1 and 2, the outer circumference of one side of the pair of steel pipes 40 opposite ends positioned on the same line is bent and extended at both ends of the circumferential direction. A first ring plate 20 each having first coupling pieces 21 formed thereon; The second coupling piece 31 surrounding the outer circumferential side of the opposite end of the steel pipe 40 and bent and extended at both ends in the circumferential direction, and bolted to the first coupling piece 21, has the first coupling piece 21. A second ring plate 30 formed to correspond to each other; A plurality of reinforcing pieces 25 installed to have a predetermined length in the circumferential direction of the first ring plate 20 and the second ring plate 30 perpendicular to the first coupling piece 21 and the second coupling piece 31. ); Coupling means 35 fastened to the through hole 32 of the first coupling piece 21 and the second coupling piece 31 to secure the first coupling piece 21 and the second coupling piece 31 mutually. Suggested steel pipe fittings 10 for the support, characterized in that it comprises a).

However, in the background art, even when the first coupling piece 21 and the second coupling piece 31 are coupled to each other by a coupling means 35 such as a bolt at the time of steel pipe coupling, the gap does not come into close contact with each other due to the characteristics of friction welding. Appears, and the same tightening force (torque) is not introduced between the bolts for coupling the first coupling piece 21 and the second coupling piece 31 due to such a gap, so that some bolts do not have a proper tightening force. There was this.

In addition, the background art is that it is difficult to place the reinforcing steel pipe fittings 10 in the central portion where the steel pipe 40 and the steel pipe 40 is connected, short if the reinforcing steel pipe fittings 10 is not disposed in the center There is a problem that the strength of supporting the steel pipe 40 on the side to be disposed is lowered and the bending performance of the entire joint portion is lowered.

In addition, the steel pipe 40 is generally cut in the field according to the distance between the earth wall, when cut in the field, the cross section of the steel pipe 40 is not vertical or the cut surface may not be smooth, When the steel pipe 40 is used as a support, the force is not evenly transmitted in the axial direction. In the case of the background art, the steel pipe 40 directly touches the steel pipe, thereby making this problem even larger.

Registered Patent No. 838736 "Steel Pipe Fitting and Coupling Device for Reinforcement"

The present invention is to solve the problems of the prior art as described above, as a friction joint type brace steel pipe jointing device for connecting the steel pipe and the steel pipe, to have a constant position between the steel pipe to ensure a uniform bending performance steel pipe It is an object to provide a joint device.

In addition, an object of the present invention is to provide a steel pipe joint device for a support that can transmit a uniform axial load without being affected by the cross-sectional state of the steel pipe.

In addition, an object of the present invention is to provide a steel pipe fitting device for the prop brace so that the coupling means are not destroyed by a difference in the fastening force of the coupling means due to the inevitable gap in the friction joint type bracing steel pipe fittings.

In order to achieve the above object, the present invention provides a construction method of the steel wall brace for retaining walls using the steel pipe fittings, steel pipe braces and steel pipe fittings for braces as follows.

The present invention includes a first ring plate surrounding the outer circumferential one side surface of the pair of steel pipe opposing ends positioned on the same line, each of the first coupling pieces bent extending to both ends of the circumferential direction; And a second ring plate surrounding the outer circumferential side of the steel pipe opposing end portion, the second ring plate being bent at both ends of the circumferential direction to be formed so that the second coupling piece corresponds to the first coupling piece, respectively. As the coupling means is coupled to the coupling piece and the second coupling piece of the second ring plate, the inner surfaces of the first ring plate and the second ring plate adhere to the outer surfaces of the pair of steel pipes, and the first ring plate and the second ring plate are coupled to each other. At least one of the ring plates includes reinforcing protrusions defining the position of the steel pipe on the inner surface of the longitudinal center, wherein the reinforcing protrusions are formed along the inner surface of the first ring plate or the second ring plate and spaced in the longitudinal direction. A plurality of reinforcing members positioned and the first ring plate in the space between the reinforcing members to prevent the inserted steel pipe from being rolled up by the weld bead. It provides a steel pipe fittings for the reinforcement characterized in that it comprises a welding portion for fixing the position of the reinforcement with respect to the second ring plate.

At this time, the reinforcing protrusions preferably have a height greater than the thickness of the steel pipe.

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In addition, the reinforcement may protrude perpendicularly to the inner surface, and the weld may be formed by filling a space between the reinforcement.

Furthermore, a connector is further included between the first coupling piece and the second coupling piece to equalize the fastening force of the coupling means for fastening the first coupling piece and the second coupling piece, and the connector is connected to the first coupling piece. And a head portion which contacts the end of the second coupling piece and is exposed to the outside, and a coupling hole through which the coupling means passes is formed vertically and disposed between the first coupling piece and the second coupling piece.

At this time, the first coupling piece side and the second coupling piece side of the coupling portion of the connector may be further provided with a pad made of synthetic resin, rubber or magnet, respectively.

In addition, the connector may have the same length as the length of the first and second coupling pieces, otherwise the connector has a length shorter than the length of the first and second coupling pieces, a plurality of connectors are provided on one side The position corresponding to the reinforcement protrusion may be located between the connector of the one side to check the arrangement state of the steel pipe between the connector disposed on one side.

The present invention provides a steel pipe support for supporting a retaining wall when constructing a retaining wall, comprising: a plurality of steel pipes arranged to connect the retaining wall on one side and the retaining wall on the other side; And a joint device disposed between the steel pipe and the steel pipe to closely wrap and wrap the outer surface of the pair of steel pipes, wherein the joint device wraps around one outer surface of the pair of steel pipe opposing ends and extends at both ends in the circumferential direction. First ring plates each of which first coupling pieces are formed; A second ring plate surrounding the other outer circumferential surface of the opposite end of the steel pipe, the second ring plate being bent at both ends of the circumferential direction, and the second coupling pieces respectively formed to correspond to the first coupling pieces; And a reinforcing protrusion defining a position of the steel pipe on the longitudinal center inner surface of the first ring plate and the second ring plate, wherein the reinforcing protrusion is formed along the inner surface of the first ring plate or the second ring plate, A plurality of reinforcement members spaced apart in the longitudinal direction, and a weld part for fixing the reinforcement member relative to the first ring plate or the second ring plate in a space between the reinforcement members to prevent the inserted steel pipe from being rolled up by the welding bead. It includes, the first coupling piece of the first ring plate and the second coupling piece of the second ring plate are mutually coupled by a coupling means in a state spaced at a predetermined interval, the reinforcing protrusions by the coupling device It provides a steel pipe brace that the end of the steel pipe to be connected is in close contact.

In the present invention, in the space between the first coupling piece and the second coupling piece, in close contact with the first coupling piece and the second coupling piece, may further include a connector for ensuring a uniform fastening force of the coupling means. have.

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The present invention is a method of constructing a steel pipe reinforcement between the facing wall to support the retaining wall during the excavation work using the above-mentioned joint device, a pair of steel pipes spaced apart from each other more than the width of the reinforcing protrusion of the joining device A first coupling piece and a second coupling formed at the circumferential ends of the first and second ring plates after positioning the first and second ring plates so as to surround the connecting ends and to place the reinforcing protrusions of the joint device between the steel pipes and the steel pipes. A steel pipe connected to both protruding surfaces of the reinforcing protrusion by pressing the steel pipe in an axial direction and then tightening the inner surface of the first and second ring plates to the outer surface of the steel pipe by fastening the coupling member to the piece. It is possible to provide a method of constructing a steel wall support for earth retaining wall, characterized in that the ends of the close contact with each other.

In addition, before or when engaging the coupling means to the first coupling piece and the second coupling piece, by placing a connector between the first coupling piece and the second coupling piece to fasten the coupling means by the first coupling piece. The coupling piece and the second coupling piece may each be in close contact with the connector.

The present invention is a friction joint type brace steel pipe joints connecting the steel pipe and the steel pipe through the configuration as described above, to have a constant position between the steel pipe can provide a brace steel pipe joint for securing a uniform bending resistance performance. In this way, it is possible to provide a steel pipe brace in which buckling does not occur.

In addition, the present invention provides a steel pipe joint for the reinforcement capable of transmitting a uniform axial load without being influenced by the cross-sectional state of the steel pipe, whereby the axial load does not cause the bending moment, so that the buckling does not occur Can provide braces.

In addition, the present invention can provide a steel pipe joint device for the prop brace so that the coupling means is not destroyed by the difference in the fastening force due to the coupling means due to the inevitable gap in the friction joint type bracing steel pipe joint device, thereby The durability of the device and the performance of steel pipe braces can be improved.

Furthermore, the present invention provides a steel pipe brace construction method for improving the bending performance by using the steel pipe fittings for the brace as described above.

1 and 2 is a view showing a steel pipe fittings for the support of the background art.
Figure 3 is a perspective view of a steel pipe brace equipped with a steel pipe fitting for the brace of the present invention.
Figure 4 is an exploded perspective view of the steel pipe fittings for the brace of the present invention.
5 is a cross-sectional view of the first ring plate of the reinforcing steel pipe joint of the present invention, (a) before welding, and (b) after welding.
FIG. 6 is a view in which the steel pipe is friction-bonded to the reinforcing steel pipe fitting and pressed in the axial direction to be sealed. (A) is a cross-sectional view when the reinforcing protrusion is composed of a single reinforcing material. It is sectional drawing when a reinforcement protrusion part is comprised from several reinforcement materials.
7 is a perspective view of another embodiment of a steel pipe brace of the present invention.
8 is a perspective view of the steel pipe fittings for the reinforcement of the present invention.
9 is a view of the connector of FIG. 7 (a) is a perspective view, (b) is a cross-sectional view.
10 is a modification of the connector of FIG. 7, (a) is a perspective view, and (b) is a sectional view.
FIG. 11 is a modification of the reinforcing steel pipe fitting of FIG. 7, wherein (a) is a perspective view, (b) is a side view, and (c) is a partial sectional view. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a perspective view of a steel pipe brace equipped with a steel pipe fitting 100 for the brace of the present invention.

As shown in FIG. 3, the reinforcing steel pipe fitting device 100 of the present invention surrounds an outer surface of one side of the pair of steel pipes 40 opposite ends positioned on the same line and is bent and extended at both ends of the circumferential direction. The outer side surfaces of the first ring plate 110 and the steel pipe 40 opposite ends of which the pieces 111 are formed are respectively wrapped, and are bent and extended at both ends of the circumferential direction so that the second coupling pieces 121 are formed of the first coupling pieces ( And a second ring plate 120 respectively formed to correspond to the second ring plate 111, and the second coupling piece 111 of the first coupling piece 111 and the second ring plate 120 of the first ring plate 110. The coupling means 130 is fastened to 121.

The first ring plate 110 is formed in a substantially semi-circular shape so as to at least partially surround one outer surface of the circumferential direction of the opposite end of the pair of steel pipes 40 located on the same line, the inner diameter of which is substantially the same as the outer diameter of the steel pipe 40. It has a corresponding diameter, the first coupling piece 111 is formed at both ends of the circumferential direction of the first ring plate 110 to be interconnected with the second ring plate 120.

The first coupling piece 111 is bent and extended in the radial direction of the first ring plate 110 at both ends of the first ring plate 110, the coupling hole 112 for inserting the coupling means 130 is A plurality is formed to be coupled to the second coupling piece 121 of the second ring plate 120.

The second ring plate 120 is formed in a substantially semi-circular shape so as to surround at least a portion of the outer circumferential outer surface of the opposite end of the steel pipe 40 so as to face the first ring plate 110 centering on the steel pipe 40. At this time, the inner diameter of the second ring plate 120 has a diameter corresponding to the outer diameter of the steel pipe 40, the first coupling piece (1) of the first ring plate 110 at both ends of the circumferential direction of the second ring plate 120 The second coupling piece 121 to be interconnected with the 111 is bent to correspond to the first coupling piece 111.

The second coupling piece 121 is bent in the radial direction of the second ring plate 120 at both ends of the second ring plate 120, respectively, and the coupling hole 122 for inserting the coupling means 130 is A plurality is formed to be coupled to the first coupling piece 111 of the first ring plate 110. As a result, the first ring plate 110 and the second ring plate 120 may wrap and fix one side and the other outer surface of the pair of steel pipes 40 in the circumferential direction of the end to connect the pair of steel pipes 40 to each other. have.

Coupling means 130 may be used in various ways coupling means, in this embodiment used a bolt / nut. Coupling means 130 by tightening the first coupling piece 111 of the first ring plate 110 and the second coupling piece 121 of the second ring plate 120, the first ring plate 110 and The inner surface of the second ring plate 120 is in close contact with the outer surface of the pair of steel pipes 40. In this case, as shown in FIG. 3, in order for the first and second ring plates 110 and 120 to closely adhere to the steel pipe 40, the first and second ring plates 110 and 120 may cover the entire outer circumference of the steel pipe 40. The first coupling piece 111 and the second coupling piece 121 are fastened by the coupling means 130 with a predetermined gap G without being surrounded.

Meanwhile, in the present invention, at least one of the first ring plate 110 and the second ring plate 120 defines a reinforcement protrusion defining a position of the steel pipe connected to the inner surface of the center in the longitudinal direction of each of the ring plates 110 and 120. And 150. The reinforcement protrusion 150 protrudes inward of the first and second ring plates 110 and 120, and is formed along the circumferential direction of the first and second ring plates 110 and 120, and the steels are formed at both sides in the longitudinal direction. Reinforcement 151 and the welder 152 for fixing the reinforcement 151 to the first and second ring plates (110, 120) is formed.

4 is a perspective view of such a reinforcing steel pipe fitting 100 is shown, Figure 5 is a cross-sectional view of the first ring plate 110 of the reinforcing steel pipe fittings 100, Figure 6 A cross-sectional view of the steel pipe joint 100 when connecting the steel pipe 40 is shown.

Reinforcing steel pipe fitting device 100 of the present invention, as shown in Figure 4, includes a reinforcement protrusion 150 protruding inward in the center in the longitudinal direction. By including the reinforcement protrusions 150 in the center in the longitudinal direction, the length of the steel pipe 40 inserted into the reinforcing steel pipe fitting device 100 from one side and the other side can be the same. The longer the length of the steel pipe 40 covered by the joint apparatus 100 increases the bending performance that resists bending, and when the length of the joint apparatus 100 is limited, the steel pipe 40 should be equally covered. The overall performance of steel pipe braces can be improved.

The joint device 100 of the present invention includes a reinforcing protrusion 150 that limits the length of the steel pipe 40 is inserted, by which the steel pipe 40 may not be inserted more than a predetermined length. . This is because, especially in the field, the joint structure of the structure such as the background art has no difficulty in centering the joint 100 in the connection portion of the steel pipe, not only can be easy to work, but also the bending performance that can be obtained by not centering It is possible to prevent the occurrence of low bending performance.

Meanwhile, the reinforcement protrusion 150 of the joint apparatus 100 of the present invention has a height h greater than the thickness t of the steel pipe 40 (see FIG. 6), which means that the steel pipe 40 has the reinforcement protrusion 150. In order to effectively transmit the axial load transmitted to the steel pipe 40 when in close contact.

In addition, in the present invention, the reinforcing protrusion 150 may be implemented by welding a single reinforcing material 151 to the first and second ring plates 110 and 120 as shown in FIG. However, as shown in Figure 6 (a), in the case of implementing a single reinforcement 151, in order to weld the reinforcement 151 to the first ring plate 110 or the second ring plate 120 to both sides Formation of the weld 152a, 152b is inevitable.

However, in the case of the first and second ring plates 110 and 120 of the present invention, it is in close contact with the outer surface of the steel pipe 40, whereby between the first and second ring play (110, 120) and the reinforcing material 151 In the welding portion 152a, 152b by welding is in contact with the end of the steel pipe 40, which will prevent the end of the steel pipe 40 in close contact with both protruding surface 154 of the reinforcing protrusion 150, reinforcement When the steel pipe 40 is pressed to closely contact the two protruding surfaces 154 of the protrusion 150, the steel pipe 40 is bent inward along the welds 152a and 152b.

As such, when the steel pipe 40 is bent, the axial load transmitted by the steel pipe 40 is transmitted along the bending direction, whereby a part of the axial load acts as a bending moment to cause buckling. Can be.

Accordingly, in the present invention, as shown in FIG. 6 (b), the plurality of reinforcing members 151 are spaced apart at predetermined intervals in the longitudinal direction, and the first or second ring plates 110 and 120 are disposed in the space between the reinforcing members 151. The welding unit 152 to fix the reinforcing material 151 is formed.

At this time, the weld 152 is not formed on the side into which the steel pipe 40 is inserted, whereby the end of the steel pipe 40 can be in close contact with both of the protruding surfaces 154 of the reinforcing protrusion 150, and the steel pipe 40 The end of the bend can be prevented.

In the embodiment of FIG. 6 (b), since the weld 152 is formed only on one surface, the entire space 153 between the reinforcing materials 151 (see FIG. 5 (a)) is filled with the weld metal, and thus the first or second is welded. Enhances the coupling force of the ring plates 110 and 120 and the reinforcement 151, the reinforcement protrusion 150 may be configured to effectively transmit the axial force.

The method of constructing the steel pipe brace between the facing walls to support the retaining walls during the excavation work using the joint apparatus 100 of the present invention will be described. Since the process of forming the retaining wall and the conventional buttress construction method is known, the following description will focus on the features of the present invention.

The steel pipe 40 is positioned to have a width (w) or more between the steel pipe and the steel pipe 40 on the same line through an auxiliary device or a crane, and then surrounds the connection month of the steel pipe 40, and the steel pipe The first and second ring plates 110 and 120 are disposed between the 40 and the steel pipe 40 such that the reinforcing protrusions 150 of the fitting device 100 are disposed.

Thereafter, the coupling means 130 such as a bolt / nut is fastened to the first coupling piece 111 and the second coupling piece 121 formed at the circumferential ends of the first and second ring plates 110 and 120. The inner surfaces of the first and second ring plates 110 and 120 are in close contact with the outer surfaces of the steel pipe. In this way, the steel pipe is connected from one retaining wall to another.

Thereafter, a screw jack (not shown) is connected to the retaining wall and the steel pipe 40 adjacent thereto, and the steel pipe 40 is axially pressed using the screw jack (not shown). When the steel pipe 40 is pressed in the axial direction, the end of the steel pipe 40 is in close contact with both protruding surfaces 154 of the reinforcing protrusion 150, in this case, the end of the steel pipe 40 caused by cutting in the field Defects can be largely compensated. In addition, since the ends of the steel pipe 40 contact the protruding surface 154 having a smooth surface without the steel pipe 40 and the steel pipe 40 directly facing each other, the defects of the ends are not accumulated, thereby the steel pipe 40 The problem due to the cut surface of the), i.e., the end, does not occur.

Another embodiment of the invention is shown in FIGS. 7 and 8. Figure 7 is a perspective view of another embodiment of the steel pipe brace of the present invention, Figure 8 is a perspective view of the steel pipe fittings for the brace of the present invention.

The steel pipe fittings 200 for the support of FIGS. 7 and 8 surround the outer peripheral side of one side of the pair of steel pipes 40 opposite ends which are located on the same line as in the embodiment of FIG. First ring plates 210 each having a first coupling piece 211 extending therein; The second ring plate 220 which surrounds the outer surface of the other end of the steel pipe 40 in the circumferential direction and is bent and extended at both ends in the circumferential direction so that the second coupling piece 221 is formed to correspond to the first coupling piece 211, respectively. Include. In this embodiment, a plurality of reinforcements are installed to have a predetermined length in the circumferential direction of the first ring plate 210 and the second ring plate 220 perpendicular to the first coupling piece 211 and the second coupling piece 221. Piece 270; The first coupling piece 211 and the first coupling piece 211 and the first coupling piece 211 and the first coupling piece 211 and the first coupling piece 211 and the head portion 262 exposed to the outside and the fastening hole 263 is formed vertically 2 includes a connector 260 composed of a coupling portion 261 located between the coupling pieces 221, the coupling means 230 is the first coupling piece 211 and the second coupling piece 221 and the connector Fix 260 to each other.

The configuration of the first and second ring plates 210 and 220 is basically the same as that of the first and second ring plates 110 and 120 of the embodiment of FIG. 3, and the reinforcing protrusion 250 and the reinforcing material configuring the same. The configuration of the 251 and the weld 252 is the same as the reinforcement protrusion 150 of the embodiment of FIG. 3 and the reinforcement 151 and the weld 152 constituting the same. Therefore, differences from the present embodiment will be mainly described, and the same parts will be replaced with the description of the above-described embodiment of FIG. 3.

In the present embodiment, a plurality of reinforcing pieces (ie, having a predetermined length in the circumferential direction of the first ring plate 210 and the second ring plate 220 perpendicular to the first coupling piece 211 and the second coupling piece 221) 270 are installed, respectively, such a reinforcing piece 270 serves to reinforce the bonding strength therebetween when the first coupling piece 211 and the second coupling piece 221 are coupled to each other.

On the other hand, the first coupling piece 211 and the second coupling piece 221 is placed between the coupling member 400 between the first coupling piece 211 and the second coupling piece 121 and then the coupling unit 130 Through each other.

9 is a perspective view and a cross-sectional view of the connector 260. As shown in FIG. 9, the connector 260 includes a head portion 262 and a fastening hole 263 exposed to the outside by contacting end portions of the first coupling piece 211 and the second coupling piece 221. It is formed of a coupling portion 261 formed vertically and positioned between the first coupling piece 211 and the second coupling piece 221.

The head portion 262 contacts the ends of the first coupling piece 211 and the second coupling piece 221 to be exposed to the outside, so that the fastening hole 263 of the coupling part 261 is connected to the first coupling piece 211. ) And the second coupling piece 221 is used for positioning and adjustment of the coupling hole, and is protruded to be supported at the ends of the first coupling piece 211 and the second coupling piece 221, such as a fastening bolt It serves to prevent the coupling portion 261 from rotating when the coupling means 230 is vertically coupled.

The coupling part 261 is positioned between the first coupling piece 211 and the second coupling piece 221 when the first ring plate 210 and the second ring plate 220 are coupled to each other to fasten the fastening bolt. It is coupled with the first ring plate 210 and the second ring plate 220 by means 230, in close contact with the first coupling piece 211 and the second coupling piece 221, that is to prevent the occurrence of a gap It improves the fastening force of the coupling portion of the coupling means 130, such as fastening bolts, while preventing the deformation or breakage of the first coupling piece 111 and the second coupling piece 221 due to the occurrence of a gap, the first coupling piece 211 And serves to reinforce the second coupling piece 221.

That is, in the embodiment of Figures 7 and 8 to surround the outer surface of the steel pipe 40 with the two ring plates (210,220) divided and to connect the steel pipe 40 in a manner of fastening with a coupling means 230, such as fastening bolts In this case, the coupling plate is coupled by the friction force between the ring plates 210 and 220 and the steel pipe 40 by the fastening force of the fastening bolts, so that the ring plates 210 and 220 and the steel pipe 40 are in close contact with each other between the two ring plates 210 and 220 again. In other words, a constant gap G (see FIG. 3) is required between the first and second coupling pieces 211 and 221. However, when one fastening bolt is fastened and another fastening bolt is fastened due to a gap between the first and second coupling pieces 211 and 221, the fastening bolt may be loosened, thereby preventing sufficient fastening force. However, by inserting the connector 260 between the first and second coupling pieces 211 and 221 as in the present invention, the fastening force of all the fastening bolts can reach an even value evenly.

In another embodiment of the connector 260, as shown in FIG. 10, pads 264 may be coupled to both sides of the coupling part 261, and the pads 264 may be made of rubber or various kinds of synthetic resins. It can be composed of a magnet. The pad 264 is made of rubber or synthetic resin, and the pad 264 acts as a buffer when the pad 264 is engaged with the coupling means 230 to prevent breakage of the coupling means 230 such as bolts, and changes in external environment such as temperature change. It can cope with change flexibly to prevent the gap between the first coupling piece 211 and the second coupling piece 221, and to secure the clamping force without being affected by the deviation of a certain distance due to manufacturing error. To help. When the pad is made of a magnet, there is an advantage in that it is easy to temporarily fix the connector 260 between the first coupling piece 211 and the second coupling piece 221.

In this case, the fastening hole 265 is formed at the position corresponding to the fastening hole 263 of the coupling part 261 in the pad 264 for fastening with the coupling unit 230.

FIG. 11 is a modified example of the reinforcing steel pipe fitting 200 of FIG. 7, wherein (a) is a perspective view, (b) is a side view, and (c) is a partial sectional view.

Meanwhile, FIG. 11 shows an example in which two ring plates 210 and 220 are connected to each other by using one connector 260 having the same length as the first and second coupling pieces 211 and 221, as shown in FIG. 11. It may be composed of a plurality so as to have a form that is individually applied to each coupling hole. At this time, so that the close contact between the steel pipe 40 and the reinforcement protrusion 250, when the corresponding to the reinforcement protrusion 250, the interval between the connector 260 in the position.

Even if the connector 260 is not applied to all the coupling holes, when one or more connectors 260 are applied, other fastening bolts may be secured to a fastening point (a point portion where no gap is generated). In this case, the connector 260 has a smaller length than the first and second coupling pieces 211 and 221.

In addition, as shown in FIG. 11 (b), the gap G between the first and second coupling pieces 211 and 221 may serve as a window for viewing the inside, and FIG. 11 (c) through the gap G. As can be seen the arrangement state of the steel pipe 40 and the reinforcement protrusion 250. Therefore, it is possible to confirm a portion not in close contact with the addition of the axial load, and through the confirmation, continuous load transmission in the axial direction of the steel pipe 40 can be made between the wall walls.

Meanwhile, in the construction method, the connector 260 is coupled to the first coupling piece and the second coupling piece before or when the coupling means 230 is fastened to the first coupling piece and the second coupling piece 211 and 221. By arranging the connector 260 between the pieces 211 and 221 to fasten the coupling means 230, the first and second coupling pieces 211 and 221 are brought into close contact with the connector 230, respectively. In this way, the gap is removed, and the tightening force of the fastening bolts can reach the proper value evenly.

100, 200: joint paper 110, 210: first ring plate
111, 211: first engagement piece 112, 212: engagement hole
120, 220: 2nd ring plate 121, 221: 2nd engaging piece
130, 230: coupling means 150, 250: reinforcement protrusion
151, 251: reinforcing material 152, 252: welded portion
153: space 154: protrusion
260: connector 261: coupling portion
262: head portion 263, 265: fastening hole
264: pad 270: reinforcing piece

Claims (13)

A first ring plate surrounding a circumferential outer side surface of a pair of steel pipe opposing ends positioned on the same line, and each having a first coupling piece bent to extend at both ends of the circumferential direction; And
A second ring plate surrounding the other outer surface of the opposite end of the steel pipe, the second ring plate being bent at both ends of the circumferential direction and formed so that the second coupling piece corresponds to the first coupling piece,
As the coupling means is coupled to the first coupling piece of the first ring plate and the second coupling piece of the second ring plate, the inner surfaces of the first ring plate and the second ring plate are in close contact with the outer surfaces of the pair of steel pipes. ,
At least one of the first ring plate and the second ring plate includes a reinforcing protrusion defining the position of the steel pipe on the inner surface of the longitudinal center,
The reinforcement protrusions are formed along the inner surface of the first ring plate or the second ring plate, and a plurality of reinforcement member spaced apart in the longitudinal direction,
And a welded portion configured to fix the reinforcement with respect to the first ring plate or the second ring plate in the space between the reinforcement to prevent the inserted steel pipe from being rolled by the weld bead. Device. The method of claim 1,
The reinforcement protrusions are steel pipe fittings for reinforcement, characterized in that having a height greater than the thickness of the steel pipe. delete The method of claim 1,
The reinforcement is projected perpendicular to the inner surface,
The welded joint is a steel pipe fittings, characterized in that formed by filling the space between the reinforcement. The method of claim 1,
Further comprising a connector between the first coupling piece and the second coupling piece to equalize the fastening force of the coupling means for coupling the first coupling piece and the second coupling piece,
The connector is a head portion exposed to the outside in contact with the ends of the first coupling piece and the second coupling piece; and a fastening hole passing through the coupling means is formed vertically and is disposed between the first coupling piece and the second coupling piece Reinforcing steel pipe fittings characterized in that it comprises a; coupling portion. The method of claim 5, wherein
The first coupling piece side and the second coupling piece side of the coupling portion, respectively, characterized in that the pad is composed of a synthetic resin, rubber or magnet, characterized in that the additional steel pipe fittings. The method of claim 5, wherein
The connector is a reinforcement steel pipe fittings having a length equal to the length of the first and second coupling pieces. The method of claim 5, wherein
The connector has a length shorter than the length of the first and second coupling pieces, a plurality of connectors are provided on one side, the position corresponding to the reinforcement protrusion to check the arrangement state of the steel pipe between the connector is disposed on one side Reinforced steel pipe fittings, characterized in that located between the connector of one side. In the steel pipe brace supporting the wall of the wall at the time of construction,
A plurality of steel pipes arranged to connect the earthen wall on one side and the earthen wall on the other side; And
It is disposed between the steel pipe and the steel pipe, including a joint device for wrapping close to the outer surface of the pair of steel pipe,
The jointing device may include: a first ring plate surrounding a circumferential outer side surface of the pair of steel pipe opposing ends, each having a first joining piece that is bent and extended at both ends of the circumferential direction; A second ring plate surrounding the other outer circumferential surface of the opposite end of the steel pipe, the second ring plate being bent at both ends of the circumferential direction, and the second coupling pieces respectively formed to correspond to the first coupling pieces; And reinforcing protrusions defining a position of the steel pipe on the longitudinal center inner surface of the first ring plate and the second ring plate,
The reinforcing protrusion is formed along the inner surface of the first ring plate or the second ring plate, a plurality of reinforcing material spaced apart in the longitudinal direction, and the space between the reinforcing material to prevent the inserted steel pipe to be dried by the welding bead A welding part for fixing the reinforcement with respect to the first ring plate or the second ring plate,
The first coupling piece of the first ring plate and the second coupling piece of the second ring plate are mutually coupled by a coupling means in a state spaced at a predetermined interval,
The reinforcing protrusions are steel pipe props that are in close contact with the ends of the steel pipes connected by the coupling device. The method of claim 9,
In the space between the first coupling piece and the second coupling piece, in close contact with the first coupling piece and the second coupling piece, further comprising a connector for ensuring a uniform fastening force of the coupling means Steel pipe brace. delete In the method of constructing the steel pipe brace between the cladding walls facing each other so as to support the retaining wall during the excavation work using the steel pipe fitting for the reinforcement according to any one of claims 1, 2, 4 to 8. In
After wrapping the pair of steel pipe connecting ends spaced apart from the width of the reinforcing protrusions of the joint device facing each other, and placing the first and second ring plate so that the reinforcing protrusions of the joint device is disposed between the steel pipe and the steel pipe,
After fastening the coupling means to the first coupling piece and the second coupling piece formed in the circumferential end of the first and second ring plate to close the inner surface of the first and second ring plate to the outer surface of the steel pipe,
The pressing method of the steel pipe in the axial direction, the end of the steel pipe connected by the joint device to the two protruding surfaces of the reinforcing projections, respectively, characterized in that the construction method of the wall support steel pipe brace. 13. The method of claim 12,
Before or when engaging the coupling means to the first coupling piece and the second coupling piece, by placing the connector between the first coupling piece and the second coupling piece to fasten the coupling means by the first coupling piece And a second joining piece to be in close contact with the connector, respectively.

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