KR101455503B1 - A fabrication type standbar lattice girder - Google Patents

Abstract

The present invention relates to a prefabricated lattice girder which is used as a frame frame such as a tunnel construction or a vinyl house. In particular, the joining structure of the steel bar and the stand bar constituting the lattice girder bridge is improved to improve the durability and workability. The present invention relates to a prefabricated stand bar grid support structure in which a plurality of first steel bars and second steel bars are coupled to stand bars at regular intervals in a manner of being coupled to the first and second steel bars, The intermediate first fixing part of the stand bar is fixed to the upper first steel bar and the second fixing parts of both sides are fixed to the lower second steel bar by the first and second clamp bands, Wherein the second fixing part and the reinforcing bar are fixed to the second steel bar while being surrounded by the second clamp band. We propose Rip type stand bar grid support.

Description

{A fabrication type standbar lattice girder}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated lattice girder that is used as a frame frame such as a tunnel construction or a vinyl house. More particularly, the present invention relates to a prefabricated lattice girder which is improved in durability and workability, It is about grid support.

Generally, a lattice girder is also called a 'kangji-bo', and when installed in a tunnel, it is installed in an arcuate shape along the paved surface inside the tunnel to prevent sinking of the ground and falling of the rock, With a horizontal gap support, and the shocrete is installed at a constant interval to complete the tunnel foundation work.

Here, the lattice girder according to the prior art is characterized in that it includes an upper steel bar having a circular cross section extending in the longitudinal direction and a pair of lower steel bars having a smaller diameter than the upper steel bar, And is welded and formed while maintaining a constant gap by a plurality of connecting members.

The prior art related to the above-described conventional lattice girders is disclosed in the following domestic patents: 10-1994-0021892 (Oct. 19, 1994) or domestic utility model applications: 20-2002-0025938 (Aug. 30, 2002). ) Are already known. However, in order to form an arcuate shape inside the tunnels having the above-described grid pattern, the steel bars are connected to each other in the longitudinal direction by welding or the like. Therefore, when the spider is welded to the steel bar, the steel bar is severely corroded by the welding heat, the rigidity (strength) and durability are lowered, and the steel bar is irregularly deformed, and the dimensions and precision are lowered.

In addition, since spiders of uniform size are uniformly attached between steel bars disposed in parallel (triangular) shapes, and the grid support is uniformly formed, the load inside the tunnel is concentrated There is a problem that the top portion of the relatively weak arch portion is easily broken and the risk of a safety accident is very high.

Accordingly, the applicant of the present invention has decided to register the 'prefabricated stand bar grid support' of the domestic patent application No. 10-2010-0048594 (May 25, 2010) by the same applicant as the present application. According to the structure, the distance of the stand bar can be adjusted by appropriately moving the position of the stand bar along the steel bar according to the structure of the tunnel, so that the upper arch portion of the relatively weak tunnel can be more firmly reinforced and durability and safety can be improved remarkably . However, since the steel bar and the stand bar are round, there is a disadvantage that a slipping phenomenon occurs or a fixing force is lowered at a fixed portion by the fixing means.

Korean Patent Publication No. 10-1994-0021892 (Oct. 19, 1994) Domestic Utility Model Applications: 20-2002-0025938 (Aug. 30, 2002) Korean Patent Application No. 10-2010-0048594 (May 25, 2010, the same applicant as the applicant of this application)

The present invention can further increase the fixing force of the assembled stand bar and the steel bar constituting the lattice girder and further increase the durability and strength against the torsional moment (load) or the external impact force, and further the steel bar and the stand bar can be clamped And can be easily assembled by a band to improve the workability, the working precision and the quality of the stand-type stand bar grid support.

The present invention relates to a steel bar comprising a plurality of first steel bars and second steel bars, a stand bar coupled to the first and second steel bars to be supported at regular intervals in parallel, A first clamp band fixed to the upper first steel bar and a second clamp bar fixed to the lower second steel bar on both sides of the stand bar, and a second stand bar made of a second clamp band In the lattice girder, the stand bar is a three-dimensional single closed curve of '8' shape having a second fixing part on both sides of the intermediate first fixing part, and the second bent part formed on the edge of the second fixing part is a second steel Bar; And a second fixing part of the stand bar and a reinforcing bar are connected to the second clamping band and the second clamping band, respectively, and a reinforcing bar for connecting the second fixing parts on both sides of the stand bar in a straight line, And fixed to the second steel bar; The first clamp band and the second clamp band are respectively wrapped by a first band and a second band each having a 'C' character and the first and second fixing parts contacting the first steel bar or the second steel bar, 1, a rod having a fastening hole is inserted into an end of a second band, and a fastener is coupled and fixed to the fastening hole.

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The present invention has been made in view of the above problems, and it is an object of the present invention to provide a steel bar and stand bar in which the durability (strength) of the lattice girder is further increased and the weight is reduced, Storage, assembly, etc., and it is possible to improve workability even in a worksite.

Further, the prefabricated stand bar grid of the present invention firmly supports the frame surface of a tunnel construction site or a facility such as a vinyl house to further improve durability (strength), safety, reliability and quality It is very economical to shorten the construction period and significantly reduce the construction cost.

1 is an exploded perspective view showing the construction of a prefabricated stand bar grid support according to a first preferred embodiment of the present invention.
Fig. 2 is a front view showing the assembled lattice girder according to the present invention in a longitudinal section. Fig.
3 is a cross-sectional view taken along the line "A" to "A"
4 is a side elevational view of a lattice girder in accordance with a second embodiment of the present invention.
5 is a view showing a state in which the reinforcing bars of the lattice girder are installed diagonally.
6 and 7 are diagrams showing a configuration of a clamp band according to a fourth embodiment of the present invention.
8 and 9 are diagrams showing the configuration of a clamp band according to a third embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention according to the above-mentioned drawings is characterized in that in a prefabricated stand bar grid support wherein a plurality of first steel bars 12 and second steel bars 12a are coupled with stand bars 14 and are supported in parallel at regular intervals And the first and second clamping bands 20 and 20a assembled on the first and second steel bars 12 and 12a in a detachable manner, Is fixed to the upper first steel bar 12 and both the second fixing portions 14b are fixed to the lower second steel bar 12a while the both side second fixing portions 14b of the stand bar 14 are fixed, The second fixing part 14b and the reinforcing bar 30 are fixed to the second steel bar 12a while being enclosed by the second clamp band 20a. .

The above is explained in more detail as follows.

First, in the assembled stand bar grid support 10 according to the preferred embodiment of the present invention, the upper first steel bar 12 and the lower second steel bar 12a having a predetermined length are arranged at regular intervals , And is preferably formed in an arcuate shape inside the tunnel.

The grid support 10 includes first and second steel bars 12 and 12a and a stand bar 14 supporting the first steel bar 12 and the second steel bar 12, And first and second clamp bands (20, 20a) for assembling the first and second steel bars and the stand bars, and connecting the end portions of the steel bars, The connecting means 40 is provided.

The first and second steel bars 12 and 12a have a predetermined unit length and are arranged in parallel with each other at a predetermined interval. Preferably, the first and second steel bars 12 and 12a are provided at both lower sides of the upper first steel bar 12 And the lower second steel bars 12a are firmly supported by the stand bars 14 with a predetermined spacing therebetween.

According to the present invention, the stand bar 14 is a three-dimensional solid closed curve of an '8' shape having the second fixing portions 14b on both sides of the intermediate first fixing portion 14a, 14b are coupled to the second steel bar 12a by forming a second bent portion 14d at the corners thereof and both ends of the reinforcing bar 30 are coupled to the second bent portion 14d .

In other words, the stand bar 14 is composed of a single closed curve formed by three-dimensional polygons bent at a predetermined length and connected at their ends. As shown in the figure, Quot ;, and the " 8 " The first fixing part 14a is connected to the first steel bar 12 and the second fixing part 14b is disposed at the lower part about the first fixing part 14a. 2 fixing portions 14b are respectively coupled to the second steel bars 12a. The second bent portion 14d provided between the second fixing portions 14b connects and supports the second steel bar 12a. The first and second fixing parts 14a and 14b are fastened by the first and second clamping bands 20 and 20a in parallel contact with the steel bar.

According to the present invention, the first and second clamp bands 20 and 20a are formed in the first and second steel bars 12 and 20a in a state in which the upper first fixing portion 14a of the stand bar 14 is fitted inward, A first band (22,24) wrapped and assembled; A second band (22a, 24a) which is assembled by wrapping the second steel bar (12a) in a state where both side second fixing portions (14b) of the stand bar (14) are fitted inside; And a fastener (28) for fixing the first and second bands (22, 24, 22a, 24a).

In other words, the first and second clamp bands 20 and 20a are for fastening the stanchion bar and the steel bar, and the divided first bands 22 and 24 and the second bands 22a and 24a, And a fastener 28 for fastening the second band. The first and second bands 22, 24, 22a, and 24a are divided into halves to partially surround the steel bars, and are formed in the shape of a circle corresponding to the shapes of the first and second steel bars, The first and second clamp bands can be moved and fixed along the steel bars by fastening the fasteners 28 to the fastening holes 26 formed in the fastening portions 25 on both sides. At this time, the first and second bands 22 and 22a are concavely formed so as to cover the first and second steel bars together with the stand bar 14 which is fitted inward.

The upper first steel bar 12 preferably has a larger cross-sectional area (diameter) than the second steel bars 12a on both sides of the lower part. The clamp band is also suitable for a steel bar, .

The stand bar 14 is provided with a reinforcing bar 30 to increase the strength and improve the torsional moment (load) and the durability against the external impact force. The steel bar according to the present invention, Or warpage deformation.

The stand bar 14 has a U-shaped first bent portion 14c formed by bending the corners of the second fixing portion 14b and the connecting portion 14b, and the first bent portion 14c is provided with a second bent portion 14c, The fixing force is increased by closely fitting the steel bar while the second steel bar 12a is easily spaced by the first bent portion 14c. The reinforcing bars 30 are linearly reinforced by joining both ends of the reinforcing bars 30 in parallel to the first bent portions 14c and the both ends of the second fixing portions 14b and the reinforcing bars 30 are brought into contact with the second steel bars in parallel And is fastened firmly to the second steel bar 12a by fastening it with the second clamp band 20a. More specifically, the second clamp band 20a is formed such that the second band 22a closely contacts the second steel bar while simultaneously covering the second fixing portion 14b and the reinforcing bar 30, and the second band 24a So that it is firmly fixed.

[Second Embodiment]

4 is a side view showing a clamp band according to a second embodiment of the present invention in longitudinal section.

4, the first and second clamp bands 20 and 20a are formed such that one side of the first and second bands 22 and 22 divided in half is connected to the hinge 25a, As shown in FIG. That is, the first and second clamp bands 20 and 20a are formed by connecting one end of the first and second bands 22 and 22a, which are divided in half, by a hinge 25a, It is easy to open or close the band, and there is no fear of losing any one of them, and the workability is remarkably formed.

Next, the connecting means 40 is assembled with fasteners such as a bolt or the like of the side plate of the other lattice girder by forming a fastening hole 44 in the side plate 42 coupled to the end of the steel bar, And the end of the steel bar is inserted into the engaging hole 46 having the fixing screw on the side.

In the meantime, when the prefabricated stand bar grid support 10 of the present invention is installed in an arcuate shape inside the tunnel, the first steel bar 12 located outside the arch is larger than the curvature radius of the lower second steel bar 12a . At this time, the depth of the first and second steel bars inserted into the fastening opening 46 can be easily adjusted according to the curvature of the lattice support corresponding to the situation of the construction site, and the curvature of the lattice support can be precisely Adjustment and construction.

According to the present invention, the stand bars 14 and the reinforcing bars 30 are preferably joined to the first and second clamp bands 20, 20a by welding, spot welding, tag welding, gas welding or the like And the fixing force and durability can be further improved.

5 is a view illustrating a state in which the reinforcing bars of the lattice girder are installed diagonally according to the second embodiment of the present invention. The stand bar 14 includes a second fixing portion 14b disposed at a lower portion with a first fixing portion 14a as a center and a second fixing portion 14b with two reinforcing bars 30 arranged in a straight line As shown in FIG. 5, or the straddle bars 14 cross each other diagonally to the second fixing portions 14b, as shown in FIG. 5, so as to have a more reinforced structure withstanding a side load or a torsional moment.

[Third Embodiment]

6 and 7 are views showing the configuration of a clamp band according to a fourth embodiment of the present invention. 6 and 7, the present invention is characterized in that a stand bar 14 is coupled to a plurality of first steel bars 12 and second steel bars 12a, In the stand bar lattice support, the first and second clamp bands (20, 20a) assembled on the first and second steel bars (12, 12a) The first fixing portion 14a is fixed to the upper first steel bar 12 and the second fixing portions 14b on both sides are fixed to the lower second steel bar 12a. The first fixing part 14a and the second fixing part 14b which are in contact with the first steel bar 12 or the second steel bar 12a are divided into first and second bands 22, 22a of the first and second bands 22 and 22a and the fastening holes 26 and 26a are fitted in the end portions 23 of the first and second bands 22 and 22a with the fastening holes 29 and 26a, And is fastened by a fastener (28).

In other words, the first and second C-shaped bands 22 and 22a are selectively coupled to the first and second fixing portions 14a and the first and second steel bars 12 and 12a, respectively . The first and second bands are formed in the shape of a round ring at the ends so that the rods 29 are fitted in the both ends 23 and the fastening holes 26 and 26a So that the fastener 28 is coupled through. At this time, the hook body 29 is provided with a fastening hole 26 in one selected one, and a screw is formed in the other fastening hole 26a, so that the fastening hole 28 such as a bolt is screwed. The end portion 23 is durability is increased by press-fitting the end of the rounded bent ring and welding by welding (W) method including spot welding.

As a result, the first and second bands 22 and 22a expand the contact area (fixed area) by the annular end 23 and the hook 29, thereby further improving the fixing force and durability.

[Fourth Embodiment]

FIGS. 8 and 9 are views showing a configuration of a clamp band according to a third embodiment of the present invention.

8 and 9, according to the present invention, a plurality of first steel bars 12 and second steel bars 12a are coupled to a stand bar 14, In the stand bar lattice support, the first and second clamp bands (20, 20a) assembled on the first and second steel bars (12, 12a) The first fixing part 14a is fixed to the upper first steel bar 12 and the second fixing parts 14b on both sides are fixed to the lower second steel bar 12a, First and second C-shaped bands 27 and 27a are welded to the second fixing portions 14a and 14b by fusion and the first and second bands 27 and 27a are joined to the first and second steel bars 12 and the second steel bar 12a, respectively.

That is, the first and second clamp bands 20 and 20a are formed such that the first and second bands 27 and 27a are formed in a C shape, 1 fixing portion 14a and the second band 27a is welded to the bottom surface of the second fixing portion 14b. The first and second bands 27 and 27a are elastically expanded as the first and second steel bars 12 and 12a are elastically inserted into the gap between the open ends 23, Respectively. At this time, the end portion 23 is rounded and bent at its ends, so that the steel bar can be easily assembled and fitted, reinforced, prevented from being scratched or damaged, and prevented from being injured during operation.

It is preferred that the first band 27 located at the upper part of the grid support does not expose the end 23 to the upper surface of the first steel bar 12 because the plate 23, Etc., are brought into intimate contact with the steel bar without interfering with the end portion.

9, the first and second clamp bands 20 and 20a are provided with first and second bands 27 and 27a and first and second steel bars 12 and 12a, respectively, 28 ', the fixing force is further increased. At this time, the first and second steel bars 12 and 12a are preferably pipes, and the fastener 28 'is preferably formed of a screw, a screw piece, or the like.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood that the technical scope of the present invention is not limited to those described in the foregoing embodiments, It is intended to explain more clearly and easily, and permutation, modification and improvement are possible.

10: lattice support 12: first steel bar 12a: second steel bar
14: stand bar 14a: first fixing portion 14b: second fixing portion
14c: first bent portion 14d: second bent portion 20: first clamp band
20a: second clamp band 22, 24: first band 22a, 24a: second band
23: end portion 25: fastening portion 25a: hinge
26, 26a, 44: fastening hole 27: first band 27a: second band
28, 28 ': fastener 29: hook 30:
40: connecting means 42: side plate 46:
W: Fusing

Claims (5)

A plurality of first steel bars 12 and second steel bars 12a, a stand bar 14 coupled to the first and second steel bars 12 and 12a to be supported at regular intervals, The middle first fixing portion 14a of the stand bar 14 is fixed to the first upper steel bar 12 and the lower first fixing bar 14a is assembled on the first and second steel bars 12, The first clamp band 20 and the second clamp band 20a fixing the second fixing part 14b to the lower second steel bar 12a,
The stand bar 14 is a three-dimensional solid closed curve of an '8' shape having a second fixing portion 14b on both sides of the intermediate first fixing portion 14a, and is formed in the corner of the second fixing portion 14b The second bent portion 14d is engaged with the second steel bar 12a;
A reinforcing bar 30 for connecting the second fixing portions 14b of the stand bar 14 in a straight line is provided and both ends of the reinforcing bar 30 are connected to the second bending portion 14d to be straight, The second fixing portion 14b of the stand bar 14 and the reinforcing bar 30 are fixed to the second steel bar 12a while being enclosed by the second clamp band 20a;
The first and second clamp bands 20 and 20a have a first fixing part 14a and a second fixing part 14b contacting the first steel bar 12 or the second steel bar 12a, Are wrapped by a first band 22 and a second band 22a which are C 'shaped and have fastening holes 26 and 26a at end portions 23 of the first and second bands 22 and 22a, And a fastener (28) is coupled and fixed to the fastening holes (26, 26a) with the fastener (29) interposed therebetween. delete delete delete delete

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