KR20200134191A - Precast structure for expanding road - Google Patents

Abstract

The present invention relates to a road bridge expansion type precast structure, which can apply a method capable of improving economic feasibility when a road bridge is expanded. The road bridge expansion type precast structure includes: pile parts having column parts made of double steel pipes and upper panel parts arranged on upper sides of the column parts; beam structures which are mounted on upper surfaces of the upper panel parts and of which both ends are supported on the pile parts adjacent thereto; and panels of which edges are supported on the beam structures.

Description

Road bridge extension type precast structure{PRECAST STRUCTURE FOR EXPANDING ROAD}

The present invention relates to an extension construction of a road bridge, and more specifically, to an extension type precast structure for a road bridge that can be applied to a construction method that improves economic efficiency when the road bridge is extended.

In general, a bridge is an elevated structure made to be able to cross over a stream, lake, strait, bay, canal, lowland, or other traffic route or structure. There are many different bridges, depending on the type and the kind of things to cross.

Therefore, depending on the purpose of use, the main examples of the bridge are road bridges through which vehicles can pass and pedestrian bridges through which people can walk, and it is also common to see a case where a pedestrian bridge is installed on the road bridge.

Such a road bridge or sidewalk is composed of a bridge deck, a bridge pier supporting the lower part of the bridge deck, and an alternation. The road bridge receives great resistance not only from its own load, but also from the load according to the traffic volume, water pressure, or water flow rate. In order to overcome, a certain support force is required for the piers and abutments supporting the lower part of the bridge.

In addition, there is a need to expand the existing roads or sidewalks according to the increase in the amount of traffic or pedestrian traffic. However, in the case of a bridge type, the expansion process is limited.

Korean Patent Registration No. 10-0977482 discloses a sidewalk bridge that is extended and installed on a conventional road bridge, and FIG. 1 is a perspective view thereof.

Looking at this in detail, the sidewalk bridge (N) is a longitudinal direction connected by bolts and nuts to the left and right sides of the top, with a steel column 10 inserted into the existing road slope (S), and the steel column 10 as the center. A connecting plate 30 which is integrally connected to the member 200 and the left and right longitudinal members 20 with bolts and nuts, and for expanding a column fixedly installed with bolts and nuts on the connecting plate 30 An intermediate extension bracket 50 fixedly installed with bolts and nuts on the longitudinal member 20 between the bracket 40 and the column extension bracket 40, and the column extension bracket 40 and the intermediate extension A support part 60 welded to the upper surface of the bracket 50, a reinforcing material 70 for supporting a floor frame, which is inserted and installed in the support part 50, and has a predetermined cross-sectional shape, and a reinforcing material for supporting the floor frame ( 60) consists of a wooden floor plate 80 that is fixed and installed at the same time, and a railing 90 fixedly installed with bolts and nuts on both sides of the column expansion bracket 40 and the intermediate expansion bracket 50 do.

In the case of the extension of the pedestrian bridge, the load is relatively small and the construction complexity is low, but in the case of the extension of the road bridge, it is difficult to directly apply the above-described extension of the pedestrian bridge due to structural stability and durability problems.

Therefore, in order to expand the road bridge, it is expanding through additional construction or reclamation methods. However, when such an existing method is applied, not only the construction cost is excessive, but also the length of the construction period is lengthened, causing inconvenience to transportation.

In order to improve this, the idea to expand the road bridge by applying the precast method has been made, but fundamentally, structural problems such as deterioration in quality during transportation and cracks during installation occur, and practical application cases are rare because the reality is poor.

Here, the precast method refers to a method of constructing structures in the field of construction and civil engineering by pre-manufacturing them in a factory and assembling them in the field.

Accordingly, there is an urgent need to develop an extension method that allows economic access to existing road bridges as road traffic increases.

The present invention was conceived to solve the above problems, and an object of the present invention is to provide a road bridge extension type precast structure capable of applying a construction method capable of ensuring reliability when installing and improving economic efficiency when expanding a road bridge.

The present invention is a precast structure that is formed adjacent to a road bridge to expand the road, and the support part 410 is formed of double steel pipes on the inside and outside, the upper plate part 420 coupled to the upper side of the support part, and the bottom part of the upper plate part A reinforcing portion 421 formed in a shape that extends to and corresponds to a cylindrical shape so that the upper side of the holding portion can be inserted and fastened, but the reinforcing portion 421 formed in a shape whose cross section becomes wider toward the upper side, and a pad portion 430 disposed on the upper surface of the upper plate portion A pile part 400 having a fastening member for fastening through the reinforcing part and the inner and outer steel pipes; A body 110 having bottom surfaces at both ends seated on the upper surface of the upper plate, a protrusion 150 protruding upward so as to form a stepped portion in the front and rear, and a front end protruding upward of the protrusion A beam structure 100 having a connecting member 130 and a steel wire fixing hole 140 formed through both sides of the body; And a panel 300 that is supported on the upper surface of the stepped portion and arranged in the space between the beam structure arrangements.

The beam structure is arranged in a cross shape in any one of the upper plate portions, and between them, the steel wires inserted into the steel wire anchorage are arranged to cross each other and form a seating space 440 that functions as a tension space to prevent flow between them. I can.

When the beam structure and the panel are arranged, the top surface is entirely in the form of a flat plate to form a skeleton for the expansion of the road bridge.

According to the present invention, since each of the components formed in advance can be constructed in a manner that combines on-site, the difficulty of construction can be reduced and the reliability of on-site construction can be improved.

In particular, when the road bridge is extended, it has the advantage of minimizing traffic congestion and improving economic efficiency by shortening the construction period beyond the limitations of the existing construction methods. In addition, it has the advantage of improving the economic efficiency. Since the seismic resistance can be increased, the stability of the structure is further improved.

1 is a perspective view showing a sidewalk bridge extended and installed on a conventional road bridge.
2 is a front cross-sectional view for explaining a road bridge extension type precast structure of the present invention.
3 is a perspective view showing an embodiment of a beam structure in the road bridge extension type precast structure of the present invention.
4 is a view for explaining the construction method of the precast structure of the road bridge extension of the present invention.

Hereinafter, a road bridge extension type precast structure according to the present invention will be described in more detail with reference to the accompanying drawings.

However, the embodiments described below are only for explaining in detail enough to allow a person of ordinary skill in the art to carry out the invention easily, and this limits the protection scope of the present invention. Does not mean.

In the following description, when a certain part is said to be'connected' with another part, this includes not only a case in which it is directly connected, but also a case in which another element or device is interposed therebetween. In addition, when a part'includes' a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

The present invention basically includes a pile portion having a support portion composed of a double steel pipe and an upper plate portion disposed on the upper side of the support portion, a beam structure seated on the upper surface of the upper plate portion and supported at both ends of an adjacent pile portion, and the It provides a road bridge extension type precast structure including a panel whose edges are supported on the beam structure.

The road bridge extension type precast structure described in the present invention may constitute a road bridge or a sidewalk bridge formed in various shapes at various heights by assembling a beam structure and a pile part formed in a precast method on site, and the beam structure is before the extension construction of the road bridge. It is not limited to the form described in the present invention as long as it is manufactured in the form of a unit in advance in a precast method and connected to each other through a predetermined connection process to constitute an overall structure.

2 is a front cross-sectional view for explaining a road bridge extension type precast structure of the present invention.

The beam structure 100 may be made of reinforced steel and/or concrete, and as described above, the processes of casting, curing, and hardening are completed with a predetermined shape and size before construction on the site.

The beam structure 100 may include a body 110 that is supported on the upper side of the pile part 400 at the bottom and forms an overall skeleton, and a shear connector 130 formed on the upper side of the body 110. The shear connector 130 may be formed integrally with the reinforcing bar structure inside the body 110 or in a complex shape supported by the body 110, and when a predetermined material or structure is applied to the upper portion, the bonding property is improved. Functions. The shear connector 130 is shown in the drawing in an example of a substantially'T' shape, but may be configured in various shapes and arrangements such as a rectangular shape.

A predetermined stepped structure is formed on the upper side of the body 110 so that a plate-shaped panel is disposed between adjacent beam structures 100 to form a predetermined upper plate structure, which will be described later.

In addition, a buffer pad 120 having an elasticity compared to the body 110 may be disposed under the body 110 in consideration of flexibility and seismic performance of coupling with the pile part 400.

Meanwhile, the lower side of the pile part 400 may be fixed to a predetermined ground, and such fixing may be performed through drilling and embedding through a pile. The pile part 400 is formed of a pillar-shaped post part 410 and an upper plate part 420 disposed above the post part 410 to support the beam structure 100 from the upper surface.

The holding part 410 is preferably made in the form of a double steel pipe in consideration of structural stability and load support. Accordingly, the holding portion 410 may be formed of an outer steel pipe 411 and an inner steel pipe 412 disposed on the inner circumferential side of the outer steel pipe 411. A spaced space for structural reinforcement may be provided between the outer steel pipe 411 and the inner steel pipe 412, but in some cases, the outer steel pipe 411 and the inner steel pipe 412 may be formed by being interconnected. There will be.

The outer steel pipe 411 and the inner steel pipe 412 are formed in a hollow cylindrical shape, and are coupled to the upper plate portion 420 at the top. Ribs in a protruding shape may be formed on the outer circumferential side of the holding portion 410 in order to strengthen the bonding force with the upper plate portion 420.

The upper plate portion 420 is disposed on the upper side of the support portion 410 to function to support the beam structure 100 from the upper surface, and the upper plate portion 420 has a disk shape at least so that it can receive equal force from all directions. It would be desirable to be done.

A reinforcing part 421 is disposed at the lower side of the upper plate part 420 to be coupled with the upper side of the post part 410, and the upper side of the post part 410 can be inserted between the reinforcing parts 421. It may be arranged to correspond to the cylindrical shape. The reinforcing part 421 may have a shape in which a cross section becomes wider toward an upper side.

In order to fasten the reinforcing part 421 and the holding part 410, a fastening member (not shown) may be combined. Such a fastening member may be formed in the form of a bolt and a nut, but the welding method is optional. Or it can be applied interchangeably. As described above, a rib may be formed on the upper side of the holding part 410 corresponding to the reinforcing part 421.

The fastening member is preferably coupled through the inner steel pipe 412 and the outer steel pipe 411 of the holding portion 410 in order to ensure the certainty of the coupling.

One end of the beam structure 100 may be disposed on the upper side of the upper plate part 420 at a selected position, and a predetermined upper structure may be formed by supporting the beam structures 100 on the plurality of upper plate parts 420. In this way, the panels cover the openings formed between the arrays of the beam structure 100 so that the upper surface of the overall structure can be formed.

Accordingly, a pad portion 430 having higher elasticity than other portions may be disposed on the upper surface of the upper plate portion 420 so as to provide flexibility of coupling with the beam structure 100 and seismic resistance.

3 is a perspective view showing an embodiment of a beam structure in the road bridge extension type precast structure of the present invention.

As described above, the beam structure 100 includes a body 110 supported in a manner that is seated on the upper plate portion 420, and an additional structure or concrete can be poured on the upper side of the body 110. To this end, the shear connector 130 may be disposed, and the shear connector 130 is a member protruding upward and may be formed in a manner in which a part of the inner reinforcing bar is exposed upward. Preferably, the shear connector 130 is formed of a complex shape such as a'T' shape or a ring shape, and is formed along the upper side of the body 110 facing each other, and more precisely, a protrusion portion disposed on the upper side of the body 110 It may be arranged in a row along 150, but the arrangement shape is not necessarily limited thereto.

The upper side of the body 110 has a narrower width on the side, and the protruding portion 150 is disposed to protrude upward, and the shear connector 130 may be formed to protrude upward of the protruding portion 150. Steps 111 are formed in the front and rear directions at the connection portion between the protrusion 150 and the body 110, and the step 111 functions as a seating surface on which a panel, which will be described later, can be mounted.

A steel wire fixing hole 140, which is a predetermined through hole, may be formed through the left and right sides of the body 110, and one or more steel wires are inserted into the steel wire fixing hole 140 to ensure the reliability and durability of coupling through tension. To be. The steel wire inserted into the steel wire fixing hole 140 can improve the structural reliability of the beam structure 100, and in some cases, connect the beam structures 100 to each other or cross each other at the upper side of the upper plate part 420. It will be able to perform a function of strengthening the arrangement state between the arranged beam structures 100. In addition, the steel wire fixing hole 140 may perform a function of reinforcing the fastening force by connecting the ready-made road bridge and the beam structure 100.

4 is a view for explaining the construction method of the precast structure of the road bridge extension of the present invention.

The pile part 400 is supported in a manner in which the lower side is perforated and embedded in the ground, and a plurality of beam structures 100 are seated on the upper surface of the upper plate part 420 which is coupled to the upper side of the support part 410. It can be as above.

After the double steel pipe-shaped holding part 410 is inserted and fixed in the selected position of the ground, the upper plate part 420 may be coupled to the holding part 410 through a fastening member, and the height and position of the upper plate part 420 You decide.

When the position of the upper plate part 420 is determined, both ends of each beam structure 100 may be supported and disposed on the upper plate part 420 of the pile part 400 adjacent to each other. As shown in the figure, for structural stability, one upper plate portion 420 may be arranged at equal intervals in the shape of a cross, and the beam structure 100 is arranged so that the position of the upper plate portion 420 facing each other is a seating space. It should be defined as (440). Arrangement of a steel wire fastening member or a structure for reinforcing coupling force may be considered to prevent mutual flow in the seating space 440. This seating space 440 may function as a tension space in which the steel wire fixing port 140 is exposed to apply a tension force to improve structural rigidity.

In order to seat the upper plate part 420 and the beam structure 100 and provide seismic performance, a buffer pad 120 is coupled to the lower surface of the beam structure 100, and a pad part 430 is formed on the upper surface of the upper plate part 420 It can be arranged as above.

When the arrangement of the beam structure 100 is completed in this way, the step portions 111 formed in each beam structure 100 are arranged at a height corresponding to each other, and the upper surface of the step portion 111 is supported so that the lower surface of the corner side is supported. One or more panels 300 are disposed. The panel 300 may be made of various materials according to selection as a plate-shaped member, and for example, a case of a plywood, steel plate, or reinforced concrete precast member may be considered.

When the beam structure 100 is arranged in a cross shape on one upper plate part 420 as in the illustrated example, a rectangular opening is formed between the beam structures 100 and the rectangular panels 300 are arranged in a row. It will be able to form a square shape as a whole.

At this time, the edge portion of the panel 300 is supported on the upper surface of the step portion 111, and the side of the panel 300 is supported by the protruding portion 150 or the facing panel 300, which is a side wall of the step portion 111 It is possible to maintain the front and rear and left and right positions.

When the above arrangement is completed, the composite structure in which the beam structure 100, the panel 300, and the pile part 400 are coupled to each other is formed in a substantially flat plate shape on the upper surface to form a skeleton for the expansion of the road bridge.

When such a basic frame is completed, the composite structure is supported by distributing the longitudinal and lateral loads to each other, and construction for the expansion of the road bridge can be made on the upper surface of such a structure. At this time, concrete or asphalt may be poured on top of it or on top of an additional structure. The height to be poured may finally correspond to the top surface of an existing road bridge.

The road bridge extension type precast structure using the precast structure as described above can be constructed by combining each of the pre-formed components in the field, thus reducing the difficulty of construction and minimizing the incompleteness of the field construction. There is an advantage.

In particular, when the road bridge is expanded, it has the advantage of minimizing traffic congestion and improving economic efficiency by shortening the construction period beyond the limitations of existing construction methods.

In addition, the stability of the structure may be further improved because the seismic capacity may be increased through elasticity at the connection portion of the beam structure and the pile part.

In the above, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims described later.

100...beam structure 110...body
111...step part 120...buffer pad
130...Shear connector 140...Steel wire fixing port
150...protrusion 300...panel
400... file department 410... holding department
411...outer steel pipe 412...inner steel pipe
420...top part 421...reinforcement part
430...pad part

Claims (1)

As a precast structure formed adjacent to a road bridge to expand the road,
Arranged so as to correspond to the cylindrical shape so that the holding part 410 consisting of double steel pipes on the inside and outside, the upper plate part 420 coupled to the upper side of the holding part, and extending to the bottom of the upper plate part and allowing the upper side of the holding part to be inserted and fastened However, a pile having a reinforcing part 421 having a shape whose cross section becomes wider toward the upper side, a pad part 430 disposed on the upper surface of the upper plate part, and a fastening member for fastening through the reinforcing part and the steel pipes on the inner and outer sides Part 400;
A body 110 having bottom surfaces at both ends seated on the upper surface of the upper plate, a protrusion 150 protruding upward so as to form a stepped portion in the front and rear, and a front end protruding upward of the protrusion A beam structure 100 having a connecting member 130 and a steel wire fixing hole 140 formed through both sides of the body; And
Including; a panel 300 arranged in the space between the beam structure array is supported by the lower edge of the upper surface of the step,
The beam structure,
A seating space 440 that functions as a tension space so that the steel wires which are arranged in a cross shape in any one of the upper plate portions and inserted into the steel wire anchorages are intersected with each other and prevent flow between them,
When the beam structure and the panel are arranged, the top surface is entirely in a flat plate shape to constitute a skeleton for the expansion of the road bridge.

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