KR20060085144A - A precast railing - Google Patents

Abstract

The present invention relates to a precast handrail for increasing workability, and is a handrail that can be used in an H-beam girder bridge, and a plurality of H-beams are embedded and a predetermined shape of precast concrete having a coupling part for coupling with a barrier on an upper side thereof. It is made of panels, and the precast concrete panel is installed at the position of the outermost girder.

Precast, handrail, girder, H-beam

Description

Precast railings {A precast railing}

1 is a view for explaining the structure of a general bridge,

2 is an exploded perspective view of a precast railing according to a first embodiment of the present invention;

3 is a cross-sectional view of the combination of FIG.

4 is a view showing the shape of the bridge to which the precast railings according to the first embodiment of the present invention;

5 is a cross-sectional view of a precast railing according to a second embodiment of the present invention;

6 is a perspective view of a precast railing according to a second embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

30: Precast Concrete Panel

32, 34, 36: H section steel

38: cut off part 40: chair device

42: firewall 44: nut

46: bolt 48: slab

50: middle crossbeam 52: outward crossbeam

54: vertical rod 56: steel wire

The present invention relates to a precast balustrade, and more particularly, to a precast balustrade which is precast concrete by arranging H-beams calculated in advance in a girder located at the outermost side.

In general, bridges are elevated structures made to cross rivers, lakes, straits, bays, canals, lowlands or other traffic routes or structures, as shown in FIG. ) And the substructure 20.

The superstructure 10 refers to a structure above the alternating 22 or pier 24 and is generally comprised of a girder 12, a slab 14. Determining the type of bridge depends on the shape of the main member, which is usually the member that receives the most force. The case where the main member is a girder 12 is called a girder bridge, the case of an arch is called an arch bridge, the case of a truss is called a truss bridge, and the case supported by a cable is called a cable bridge (cable bridge, suspension bridge). The slab 14 refers to a bottom plate that allows a vehicle or the like to travel on the top.

The undercarriage 20 refers to alternating 22 and pier 24 which serve to safely transfer the load acting on the superstructure 10 to the ground. Shift 22 means the bearing of the starting point of the bridge, the bridge 24 means the intermediate bearing other than the starting point. The type of foundation, pile foundation, well well foundation, etc. depends directly on the ground conditions under the pier (24). The foundation slab 26 is located under the pier 24.

H-beam girder bridges, which are generally used in such bridges, have excellent saving effect and rigidity, and are widely applied in 20 ~ 25m sections.

However, the girder of the cantilever portion, i.e., the outermost girder, which is subjected to excessive load due to the limited mold height problem, determines the overall beam arrangement, and in particular, the twisting moment is excessively excessive, and the workability is reduced.

The present invention has been proposed to solve the above-mentioned conventional problems, and an object thereof is to provide a precast handrail for increasing workability.

In order to achieve the above object, a precast railing according to a preferred embodiment of the present invention is a railing that can be used in an H-beam girder bridge,

The upper one side is formed of a precast concrete panel having a predetermined shape in which a coupling portion for coupling with a barrier is formed and a plurality of H-shaped steels are embedded in parallel to each other in a longitudinal direction, and the precast concrete panel is positioned at the outermost girder. Characterized in that installed in.

Preferably, the blocking portion protrudes downward from one side of the bottom of the precast concrete panel.

In addition, the precast railing according to another embodiment of the present invention is a railing that can be used in the H-beam girder bridge,

The upper one side is formed with a coupling portion for coupling with the barrier, a plurality of H-beams are embedded in the longitudinal direction in parallel to each other, the plurality of embedded H-beams are mutually by a plurality of intermediate cross beams installed at equal intervals The precast of the predetermined shape is coupled to the web of the H-beams, which are adjacent to both sides of the upper bottom plate of the plurality of H-beams are a plurality of outward cross beams are installed at equal intervals to be embedded facing the upper bottom plate. It is made of a concrete panel, characterized in that the precast concrete panel is installed in the position of the outermost girder.

Preferably, any one of the embedded H-shaped steels and the barrier wall are mutually bound by a longitudinal rod.

In addition, a plurality of intermediate cross beams are formed in the plurality of intermediate cross beams, and the coupling between the plurality of intermediate cross beams is strengthened by the steel wires passing through the wire cross holes.

In addition, at least one outward crossbeam of the plurality of outward crossbeams protrude outward from the corresponding precast concrete panel, the plurality of outward crossbeams are formed through the steel wire passing through the steel wire passing hole formed in the plurality of outward crossbeams The combination of cross-interpolation is strengthened.

Hereinafter, a precast railing according to an embodiment of the present invention will be described with reference to the accompanying drawings.

(First embodiment)

2 is an exploded perspective view of a precast balustrade according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view of the coupling of FIG. The precast railing according to the first embodiment of the present invention can be said to be a railing that can be used for the H-beam girder bridge.

In the precast railing according to the first embodiment of the present invention, a coupling portion K for coupling with the barrier wall 42 is formed at one upper portion thereof, and a plurality of H-shaped steels 32, 34, and 36 are parallel to each other. It consists of a precast concrete panel 30 of a predetermined shape (eg, needle-shaped) embedded in the longitudinal direction, and the precast concrete panel 30 is installed at the position of the outermost girder.

The two H-beams 32 and 34 embedded in the precast concrete panel 30 are horizontally spaced apart from each other, and the H-beams 36 are arranged side by side on an upper portion of the H-beams 34 and mutually. The bolt 46 and the nut 44 are fastened.

In addition, at one side of the bottom of the precast concrete panel 30, a blocking part 38 for blocking rainwater intrusion from the side surface of the teaching device 40 disposed at the bottom of the precast concrete panel 30 is integrated. Will be downwardly downward.

In addition, a concave portion is formed on the upper surface of the coupling portion K of the portion protruding upward from the upper one side surface of the precast concrete panel 30, and the barrier wall 42 coupled to the coupling portion K. An iron portion is formed on the bottom surface of the bottom portion, and the protective wall 42 is assembled into the fitting portion K.

In the first embodiment of the present invention described above, three H-beams are embedded in the precast concrete panel 30, but may be appropriately four or more as necessary.

Meanwhile, according to the first embodiment of the present invention configured as described above, the slab 48 of the H-beam girder bridge (refer to FIG. 4) is transported by carrying the uncast precast railing united by the unit of precast concrete panel 30 to the construction site. The support may be installed at the position of the girders located in the outermost part of the plurality of girders. Then, the contact portion between the slab 48 and the precast concrete panel 30 may be joined by a separate joint member (not shown).

(Second embodiment)

5 is a cross-sectional view of a precast railing according to a second embodiment of the present invention, and FIG. 6 is a perspective view of a precast railing according to a second embodiment of the present invention. The precast railing according to the second embodiment of the present invention is a railing that can be used for an H-beam girder bridge, and has the same basic configuration as that of the first embodiment.

That is, in the precast railing according to the second embodiment of the present invention, a coupling part (not shown) for coupling with the barrier wall 42 is formed at one upper portion of the precast railing, and a plurality of H-shaped steels 32, 34, and 36 are formed. The plurality of H-shaped steels 32, 34, and 36 embedded in the longitudinal direction in parallel to each other are coupled to each other by a plurality of intermediate cross beams 50 installed at equal intervals. Among the 32, 34, and 36, the webs of the H-beams 32 adjacent to both sides of the upper bottom plate (not shown) are provided with a plurality of outward cross beams 52 disposed at equal intervals to face the upper bottom plate. It is composed of a precast concrete panel 30 of a predetermined shape that is embedded, the precast concrete panel 30 is installed at the position of the outermost girder.

Here, the shape of the coupling portion and the precast concrete panel 30 is the same as in the first embodiment described above. The H-shaped steels 32, 34, and 36 embedded in the precast concrete panel 30 are also embedded in the same form as in the above-described first embodiment. In addition, at one side of the bottom of the precast concrete panel 30, the blocking part 30 protrudes downward as in the first embodiment.

Singularity in the second embodiment of the present invention described above is that any one of the embedded H-shaped steel (32, 34, 36) H-shaped steel (36 in Fig. 5) and the barrier 42 is a vertical rod (54) Are bound together. In addition, a plurality of steel wire passing holes 50a are formed in the plurality of intermediate cross beams 50, and the coupling between the plurality of intermediate cross beams 50 is formed by the steel wires 56 passing through the wire passing holes 50a. Is strengthened. In addition, at least one outward crossbeam 52 of the plurality of outward crossbeams 52 protrudes outward from the corresponding precast concrete panel 30. In addition, a plurality of steel wire through holes 52a are formed in the plurality of outward cross beams 52, and a combination between the plurality of outward cross beams 52 is formed by the steel wires 56 passing through the steel wire through holes 52a. Is strengthened.

The outward cross beam 52 protruding outwardly from the precast concrete panel 30 protrudes outwardly in one shape every five, for example. Of course, the number unit projecting outward may be changed.

The plurality of intermediate cross beams 50 are installed between the H-shaped steel (32, 34) by the bolt fastening method or welding method using the end reinforcement. The plurality of outward cross beams 52 are also coupled to the web of the H-shaped steel 32 by a bolting method or a welding method using an end reinforcement material.

In order to couple the precast concrete panel 30 and the barrier wall 42 to each other, first, the upper flange of the H-shaped steel 36 embedded in the precast concrete panel 30 when the precast concrete panel 30 is made. Holes (not shown) are formed in the grooves, and the vertical rods 54 are vertically coupled before being precast concrete.

Thereafter, the barrier wall 42 (with a vertical hole formed therein) is inserted along the longitudinal rod 54, and then the upper portion of the barrier wall 42 may be bolted.

Meanwhile, according to the second embodiment of the present invention configured as described above, the slab 48 of the H-beam girder bridge (refer to FIG. 4) is transported by carrying a precast railing united in units of precast concrete panels 30 to the construction site. The support may be installed at the position of the girders located in the outermost part of the plurality of girders. Then, the contact portion between the slab 48 and the precast concrete panel 30 may be combined using an outward crossbeam 52 protruding outwardly from the precast concrete panel 30.

As described in detail above, according to the present invention, a plurality of H-beams are pre-cast concrete in the form of needle-shaped, and the pre-cast concrete panels are transported to the construction site in a pre-fabricated state of the precast concrete panels. When installed in the position of the girder to be located not only increases the workability, but also the strength to withstand the load in the cantilever portion, and can be reduced in the case of socializing torsional moment.

In addition, by combining a plurality of H-beams embedded in the precast concrete panel more tightly by using cross beams and steel wires, the force to withstand the load in the cantilever portion is stronger, and the torsional moment can be further reduced in the case of socializing.

On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea to which such modifications and variations are also applied to the claims Must see

Claims (8)

As a railing that can be used for H-beam girder bridge, The upper one side is formed of a precast concrete panel having a predetermined shape in which a coupling portion for coupling with a barrier is formed and a plurality of H-shaped steels are embedded in parallel to each other in a longitudinal direction, and the precast concrete panel is positioned at the outermost girder. Precast railings, characterized in that installed on. The method of claim 1, Precast railings, characterized in that the blocking portion protrudes downward on one side of the bottom of the precast concrete panel. As a railing that can be used for H-beam girder bridge, The upper one side is formed with a coupling portion for coupling with the barrier, a plurality of H-beams are embedded in the longitudinal direction in parallel to each other, the plurality of embedded H-beams are mutually by a plurality of intermediate cross beams installed at equal intervals The precast of the predetermined shape is coupled to the web of the H-beams, which are adjacent to both sides of the upper bottom plate of the plurality of H-beams are a plurality of outward cross beams are installed at equal intervals to be embedded facing the upper bottom plate. Precast railings, characterized in that made of a concrete panel, the precast concrete panel is installed in the position of the outermost girder. The method of claim 3, wherein Precast handrails, characterized in that any one of the embedded H-shaped steel and the barrier wall is mutually bound by a longitudinal rod. The method of claim 3, wherein Steel wire passing holes are formed in the plurality of intermediate cross beams, precast railings characterized in that the coupling of the plurality of intermediate cross-beams is reinforced by the steel wire passing through the steel wire passing holes. The method of claim 3, wherein Precast railings, characterized in that at least one outward crossbeam of the plurality of outboard crossbeams protrude outwardly from the corresponding precast concrete panel. The method of claim 3, wherein Steel wire passing holes are formed in the plurality of outward crossbeams, the precast railings characterized in that the coupling of the plurality of outward crossbeams is reinforced by the steel wire passing through the wire passing hole. The method according to any one of claims 3 to 7, Precast railings, characterized in that the blocking portion protrudes downward on one side of the bottom of the precast concrete panel.

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