KR102152829B1 - Cantilever girder bracket and method for constructing cantilever type bridge include this same - Google Patents

Abstract

The present invention relates to a girder bracket for an extension bridge, integrated with a structure, and a method of constructing an extension bridge including the same, which are configured to stably construct an extension bridge by increasing composite strength between a girder bracket for an extension bridge and a structure, regardless of slope and irregular cross section of the structure. The girder bracket for an extension bridge according to the present invention comprises: a girder body (10) arranged in a cantilever shape on a periphery part of a structure to support a deck from the bottom; a structure-side fixed bracket (20) longitudinally formed on one side of the girder body, separated by a distance from the structure, and fixed to the structure; a mortar guide (30) supported by one or more of the girder body and structure-side fixed bracket, and configured to form a placement space between the structure and the structure-side fixed bracket for the placement space to be blocked from the outside; a mortar injection part (40) configured to inject mortar into the placement space of the mortar guide so as to integrate the girder body with the structure wherein, regardless of surface state of the structure, the girder body is integrated with the structure through mortar placed via the mortar guide.

Description

A girder bracket for an extension bridge combined with a structure, and a construction method for an extension bridge including the same{CANTILEVER GIRDER BRACKET AND METHOD FOR CONSTRUCTING CANTILEVER TYPE BRIDGE INCLUDE THIS SAME}

The present invention relates to a girder bracket and an extension bridge for construction of an extension bridge, and more particularly, an extension including a girder bracket for an extension bridge synthesized with a structure for constructing a cantilever type bridge on an existing structure (bridge, embankment, etc.) It is about the school construction method.

This part provides background information related to the content of the present application, and is not necessarily prior art.

In general, extension bridges are applied to bridges that are constructed to cross rivers or valleys, where pedestrian paths cannot be constructed together during initial construction, and where additional bicycle paths or pedestrian paths are required along the embankment.

As a patent document that can confirm the background technology of the extension bridge, Registration Patent No. 10-0945041 is a bridge in which curbs are provided along the longitudinal direction at both ends in the width direction of the bridge top plate, in which one side is fixed to the curb and the other side is free. A support bracket having a step and having a plurality of through-holes having a predetermined shape at a predetermined position; A steel pipe inserted into the through hole of the support bracket and having a predetermined cross-sectional shape; In a form surrounding the steel pipe, the lower part is composed of a sidewalk top plate fixedly installed by bolts, and the support bracket has a rectangular parallelepiped shape as a whole, and an upper plate support part having a through hole formed to penetrate the front and rear sides, and one side of the upper plate support part. A support plate that is welded and made of a rectangular steel plate and has an insertion groove formed thereon; One side is welded to the upper plate support, the other side is welded to the support plate, and a heonchi portion formed in a triangular shape; A pair of fixing portions which are inserted into both sides of the support plate and are welded together, are formed in a shape of a Diguon as a whole, and have insertion grooves formed on the rear surface thereof; It is inserted into one side of the fixing part, is made of a square plate as a whole, and is composed of a fixing plate having an insertion groove on one side, the steel pipe is formed in a cross-sectional shape corresponding to the shape of the through hole of the upper plate support, the sidewalk top plate The upper plate made of a predetermined material and a connection hardware fixed by bolts on the lower surface of the upper plate and formed with a bolt hole at the lower side; It is a sidewalk member for bridge expansion consisting of a rubber pad fixedly installed by connecting hardware while being in close contact with the lower surface of the upper plate.

According to the conventional extension bridges such as patent literature, it is difficult to perform solid construction and construction work is very cumbersome and inconvenient because the slope and irregular surface of the structure are not considered at all. Specifically, the structure is difficult to match the verticality due to construction conditions, and the edge surface is generally inclined at various angles, while the surface is irregularly shaped. Since the bracket fixed to this structure is manufactured according to the verticality, the bracket There is no choice but to cause lift between the structure and the structure, and there is no way to solve this lift, so that the bracket has to be fixed to the structure with a weak fixing force, so repairs are made within a short period of time and there is a risk of falling.

Registered Patent No. 10-0945041

The present invention is to solve the above-described problems, despite the slope and irregular cross-section of the structure, by increasing the compounding force between the structure and the girder bracket for an extension bridge, which is synthesized with a structure capable of stable construction, and including the same It aims to provide a method of constructing an extension bridge.

The girder bracket for an extension bridge synthesized with the structure according to the present invention has a solution principle of providing a compound space between the structure and the girder bracket and compounding it through filling of a synthetic material, and the structure is in a cantilever shape at the periphery of the structure. A girder body disposed and supporting the deck at the bottom; A structure-side fixing part formed on one side of the girder body in the longitudinal direction and disposed at a distance from the structure and fixed to the structure; A mortar guide supported by at least one of the girder body and the structure-side fixing part and forming a casting space blocked from the outside between the structure and the structure-side fixing part; It includes a mortar injection part for synthesizing the girder body to the structure by injecting mortar into the placement space of the mortar guide, and integrally with the girder body through the mortar poured through the mortar guide regardless of the surface state of the structure. It is characterized by synthesizing.

According to the girder bracket for an extension bridge synthesized with the structure according to the present invention, and the extension bridge construction method including the same, the structure and the girder bracket are integrated by integrally synthesizing the structure and the girder bracket by filling the mortar by creating a pour space between the structure and the Stable installation of the girder bracket is possible even if it is inclined or uneven, so there is an effect of improving the stability of the extension bridge.

And, through the variable configuration of the mortar guide, it is possible to construct even if it has slopes of various angles depending on the structure, so there is an effect of further improving constructability.

1 is a perspective view of a girder bracket for an extension bridge combined with a structure according to the present invention.
Figure 2 is a side view of the girder bracket for an extension bridge combined with the structure according to the present invention.
3 and 4 are respectively an installation state diagram of a girder bracket for an extension bridge combined with a structure according to the present invention.
5 is a view showing an example in which the steel pipe applied to the girder bracket for an extension bridge synthesized with the structure according to the present invention is a double pipe.
Figure 6 is a perspective view for showing the mortar guide applied to the girder bracket for an extension bridge combined with the structure according to the present invention.
7 is a perspective view showing an example in which the mortar guide applied to the girder bracket for an extension bridge synthesized with the structure according to the present invention is of a variable type.
8 is a view showing an example of connecting the girder bodies applied to the girder bracket for an extension bridge synthesized with the structure according to the present invention.
9 is a construction process diagram of an extension bridge including a girder bracket for an extension bridge that is synthesized with a structure according to the present invention.
10 is an exemplary view of an extension bridge including a girder bracket for an extension bridge that is synthesized with a structure according to the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

As shown in FIGS. 1 and 2, the girder bracket 100 for an extension bridge synthesized with the structure according to the present invention (hereinafter abbreviated as “girder bracket”) is of the structure 1 (bridge, curb of a walkway, etc.) A structure-side fixing part disposed at the edge in the form of a cantilever and formed on one of the girder body 10 supporting the deck and both sides in the longitudinal direction of the girder body 10 and fixed to the structure 1 (see FIGS. 3 and 4) The furnace structure-side fixing bracket 20, the mortar guide 30 forming a pouring space between the structure-side fixing bracket 20 and the structure 1, an injection part for injecting mortar into the pouring space of the mortar guide 30 It is composed of 40, and is integrated with the structure 1 through the structure-side fixing bracket 20 and mortar, and maintains a certain angle even if the surface of the structure 1 is inclined and irregular.

The girder body 10 is composed of a steel pipe 11, a deck support plate 12, a reinforcing plate 13, and a reinforcing rib 14.

The steel pipe 11 is preferably a circular steel pipe, consisting of one or two or more assemblies depending on the length of the girder body 10, and in the case of two or more assemblies, as shown in FIG. 8, neighboring girder bodies 10 -1, 10-2) {or steel pipes 11-1, 11-2} are connected through a method of inserting and fixing the inner tube 10-3 (welding or bolting of a flange, etc.).

In addition, the steel pipe 11 may be a single pipe or a double pipe in which the inner pipe 11-2 is inserted into the outer pipe 11-1 and fixed by welding, as shown in FIG. 5. The inner tube (11-2) is shorter than the outer tube (11-1) in length to increase the bonding strength of the portion coupled to the structure-side fixing bracket (20).

In the case of a double tube type, it is also possible to block the inner end of the inner tube 11-2 so as to serve as a blocking plate to be described later.

The deck support plate 12 is a flat plate material to stably fix the deck and is fixed to the steel pipe 11 while being arranged along the longitudinal direction of the steel pipe 11.

The deck support plate 12 may include a steel pipe 11 or a reinforcing plate 13 and one or more welding holes for welding and fixing.

Two or more reinforcing plates 13 are fixed to the steel pipe 11 and fixed to the deck support plate 12 at regular intervals along the length direction of the steel pipe 11, and a hole through which the steel pipe 11 passes is provided. It is arranged in a direction orthogonal to the steel pipes 11 to reinforce the steel pipes 11 and increase the fixing strength of the steel pipes 11 and 12 as a medium for fixing the steel pipes 11 and the deck support plate 12.

The reinforcing plate 13 is a direction orthogonal to the longitudinal direction of the steel pipe 11 and the reverse "T" in the same direction as the longitudinal direction of the steel pipe 11 is also possible at the bottom.

The reinforcing rib 14 is a part in which the steel pipe 11 and the structure-side fixing bracket 20 are fixed, the deck support plate 12 and the structure-side fixing bracket 20 are fixed in the longitudinal direction of the steel pipe 11. It is fixed in the direction to increase the bonding strength between the girder body 10 and the structure-side fixing bracket 20.

The girder body 10 allows the mortar to be filled inside the steel pipe 11 in order to increase the compounding force of the structure 1 and the mortar, and the filling space increases its own weight when covering the entire steel pipe 11 As a result, severe sagging may occur at the free end, so it is determined through the blocking plate 15 fixed at a place away from the free end.

The barrier plate 15 is a plate material whose outer diameter corresponds to the inner diameter of the steel pipe 11 and is fixed to the inner circumferential surface of the steel pipe 11 by welding or the like to provide a space communicating with the pouring space inside the steel pipe 11.

The barrier plate 15 includes one or more stud members 15 (bolts, reinforcing bars, rods, etc.) in order to increase the composite strength between the girder body 10 and the mortar and the structure 1 along with the role of preventing the pouring of concrete. do.

The structure-side fixing bracket 20 extends from the upper end of the vertical portion 21 and the vertical portion 21 to which one side in the length direction of the girder body 10 is fixed, and is supported on the upper surface of the structure 1 It is composed of a horizontal portion 22, the vertical portion 21 and the horizontal portion 22 is fixed to the structure (1) with one or more anchors (23, 24), respectively.

The anchors 23 and 24 are fixed through a method of inserting and installing a hole in the structure 1 when the structure 1 is pre-construction, and is fixed together with the concrete construction of the structure 1 in the later construction. .

The anchors 23 and 24 fix the structure-side fixing bracket 20 to the structure 1, while themselves are buried in the mortar to increase the composite strength of the structure 1 and the girder bracket 100 of the present invention. Helps.

The structure-side fixing bracket 20 is a fixed type in which the vertical part 21 and the horizontal part 22 maintain a certain angle, and here, even if the surface of the structure 1 facing the vertical part 21 is inclined or irregular, The vertical part 21 is spaced apart from the structure 1 by a predetermined space so that it can be fixed by means of the structure 1, and this space is a space in which the mortar guide 30 is installed.

As shown in FIGS. 1 and 6, the mortar guide 30 provides a placement space for filling the mortar between the structure 1, and the rear surface 31, the bottom 32, the left and right side walls It is composed of a three-dimensional form according to (33). The mortar guide 30 of this configuration uses the horizontal portion 22 of the structure-side fixing bracket 20 as the ceiling.

The rear portion 31 is a plate having the same or similar size as the vertical portion 21 of the structure side fixing bracket 20 and is disposed to face the circumferential surface of the structure 1 and includes a hole communicating with the inside of the steel pipe 11 . In addition, the rear portion 31 is provided with a hole through which the anchor 23 passes.

The bottom portion 32 has a shape extending in the transverse direction toward the structure 1 from the bottom portion of the rear portion 31.

The bottom part 32 can be configured in a length-adjustable manner so that the free end contacts the surface of the structure 1 according to the distance from the structure 1, and, for example, a fixed-side bottom part fixed to the rear part 31 and The fixed-side bottom is connected to the front and rear, and the free end is composed of a variable-side bottom that contacts the surface of the structure (1).

The left and right side wall portions 33 are in a form that extends in a transverse direction toward the structure 1 from both left and right sides of the rear portion 31.

The left and right side wall portions 33 are formed so that the bottom portion is also connected to the bottom portion 32, and, although not shown in the drawing, a gap holder may be included in order to prevent left and right spreading from the upper side of the bottom portion 32.

The surface of the structure (1) is not uniform and varied in degree of inclination and irregularity. Nevertheless, the ends of the left and right side walls (33) should be in contact with the structure (1) to prevent mortar from leaking. There is a method of cutting the edges of the left and right side wall portions 33 in contact with the structure 1 according to the inclination of the structure 1 to be used, or a method of making the left and right side wall portions 33 a variable type.

In the latter case, as shown in FIG. 7, the left and right side wall portions 33 are composed of a fixed side side wall 34 and a variable side side wall 35 fixed to the rear surface 31.

The variable side wall 35 is connected to the fixed side wall 34 to be linearly movable and/or rotatable, and for this purpose, rails 36-1 and 36-2 formed on the lower and upper portions of the fixed side side wall 34 It is connected with a fastener (pin, etc.).

The combination of the lower rail 36-1 and the upper rail 36-2 is as follows.

The lower rail 36-1 is circular and the upper rail 36-2 is curved, the lower rail 36-1 is a straight long hole, and the upper rail 36-2 is a curved example, the lower rail 36 -1) is a straight long hole and the upper rail 36-2 is a mixture of a straight long hole and a curved line.

The mortar guide 30 may be applied with a band of elastic material so as not to cause leakage of the mortar at a portion in contact with the surface of the structure 1.

The mortar injection part 40 is a mortar in the pouring space formed by the mortar guide 30 (the mortar is all materials such as cement milk, concrete that can integrally synthesize the structure 1 and the girder bracket 100 of the present invention) It is a part for pouring), and consists of one or more holes formed in the horizontal part 22 of the structure-side fixing bracket 20 so that the inside and the outside communicate with each other or a tube shown in the drawing. In the tubular mortar injection part 40, the bottom part is disposed below the horizontal part 22 to gradually fill the mortar from the bottom of the pouring space.

In addition, although not shown in the drawings, an over-it hole for confirming the filling of the mortar may be provided together.

The mortar injection unit 40 secures the stability of the operator because the injection position is opened toward the top and is visible from the structure 1 and the injection operation is possible by the operator. Of course, since the operator can perform the fixing work of the structure-side fixing bracket 20 and the adjustment work of the mortar guide 30 on the structure 1, stability is ensured.

An extension bridge construction method including a girder bracket for an extension bridge synthesized with the structure according to the present invention is as follows (see FIG. 9).

1. Install the girder bracket (a).

end. Fixing the fixing bracket on the structure side of the girder bracket.

The structure-side fixing bracket 20 of the girder bracket 100 is mounted on the structure 1, that is, the horizontal part 22 of the structure-side fixing bracket 20 is mounted on the upper surface of the structure 1, and the vertical part 21 ) And the horizontal part 22 are fixed with anchors 23 and 24.

At this time, the mortar guide 30 can have its bottom 32 contact the surface of the structure 1, and the side wall 33 interferes with the mounting of the girder bracket 100 and the fixing of the structure side fixing bracket 20. Stay away from the structure (1) so that it does not.

I. Adjusting the angle of the mortar guide (b).

After the fixing of the girder body 10 is completed, the free end of the side wall 33 of the mortar guide 30 is adjusted so that it contacts the surface of the structure 1.

In other words, since the angle of the mortar guide 30 is freely adjusted, even if the surface of the structure 1 is made of irregular surfaces of various shapes at any slope, a pouring space that is blocked from the outside is created. 3 and 4 show examples in which the surface angles of the structure 1 are opposite to each other.

All. Mortar filling (c).

The mortar is filled in the casting space in the mortar guide 30 through the mortar injection unit 40.

When the mortar is hardened, the installation of the girder bracket 100 is completed.

In this way, a plurality of girder brackets 100 are installed along the direction of the extension bridge.

2. Deck installation (d).

A deck 200 (referring to various materials used for various purposes, such as pedestrian paths and bicycle paths) is installed on the girder bracket 100.

If necessary, a railing 300 is installed on the edge of the deck 200.

Accordingly, the construction of the extension bridge according to the present invention is completed, and FIG. 10 shows an example of the extension bridge.

10: girder body, 11: steel pipe
12: deck support plate, 13: reinforcement plate
14: reinforcing rib, 15: blocking plate
16: stud member,
20: structure side fixing bracket, 21: vertical part
22: horizontal part,
30: mortar guide, 31: rear part
32: bottom, 33: side wall
34: fixed side side wall, 35: variable side side wall
36-1: lower rail, 36-2: upper rail
40: mortar injection part,
100: girder bracket for an extension bridge combined with the structure,
200: deck,

Claims (7)

A girder body disposed in a cantilever shape at the periphery of the structure and supporting the deck at the bottom;
A structure-side fixing part formed on one side of the girder body in the longitudinal direction and disposed at a distance from the structure and fixed to the structure;
A mortar guide supported by at least one of the girder body and the structure-side fixing part and forming a casting space blocked from the outside between the structure and the structure-side fixing part;
Including a mortar injection part for synthesizing the girder body to the structure by injecting mortar into the placement space of the mortar guide, the girder body is integrated through the mortar poured through the mortar guide regardless of the surface condition of the structure. Synthesize,
The girder body is a girder bracket for an extension bridge that is synthesized with a structure, characterized in that a pouring space communicating with the pouring space of the mortar guide is formed through a blocking plate therein, so that the mortar is poured. delete The girder bracket for an extension bridge according to claim 1, which is formed on the barrier plate and comprises at least one stud member embedded in the mortar. The method according to claim 1 or 3, wherein the mortar guide comprises a rear portion facing the structure, a bottom portion protruding toward the structure at a bottom portion of the rear portion, and sidewall portions protruding toward the structure on both left and right sides of the rear portion. A girder bracket for an extension bridge combined with a structure, characterized in that made. The method according to claim 4, wherein the mortar guide is composed of a fixed side wall in which the side wall portion is fixed to the rear portion and a variable side wall that is connected to the fixed side wall to be linearly movable or rotatable to change its position according to the slope of the structure. A girder bracket for an extension bridge combined with a structure, characterized in that. The method according to claim 1, wherein the girder body comprises a steel pipe made of a single or double pipe and a deck support plate that is coupled to an upper portion of the steel pipe and supports the deck, and includes a reinforcing plate and at least one welding hole for welding and fixing. A girder bracket for an extension bridge that is combined with a structure to be used. By mounting the girder bracket for an extension bridge combined with the structure according to claim 1 in the form of a cantilever next to the structure, fixing the structure side fixing part to the structure, and adjusting the angle of the mortar guide of the girder bracket for the extension bridge combined with the structure. A first step of installing a girder bracket for an extension bridge combined with a plurality of structures in the structure by creating a casting space blocked from the outside between the structure and filling the mortar in the casting space;
A second step of installing a deck on the girder bracket for an extension bridge combined with the structure installed through the first step;
Extension bridge construction method comprising a girder bracket for an extension bridge synthesized with a structure, characterized in that it comprises a third step of installing a railing on the deck.

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