KR101711202B1 - Prefabricated precast concrete bridge deck - Google Patents

Abstract

The present invention relates to a bottom plate provided on a top of a pier providing a supporting force and constituting a bridge together with a pier,
A girder installed on the pier while connecting the bridge piers to provide a space in which the upper structure is to be placed; At least one sheath pipe is formed in a predetermined size and is placed on the girder and is made up of a plurality of sheath pipes which are mutually connected to each other to form an upper plate of the bridge, And at least one falling-off preventing curb on which a steel guide rail or an impact absorber is installed at an upper portion to prevent a vehicle from falling down. A precast panel formed respectively; And a panel connector for fixing the precast panel and the girder, wherein a plurality of the panel connectors are formed in a portion corresponding to the girder so as to penetrate the upper and lower portions, ; A mortar which is injected into the mortar injection holes and couples the precast panel and the girder through curing; A mandrel which is integrally coupled to the upper portion of the girder and is disposed inside the mortar injection hole and has at least one unevenness formed on an outer circumferential surface thereof to increase a contact area with the mortar; And a contact member, which is installed before the mortar is injected and provides an adhesion force between the precast panel and the girder, wherein the mortar injection hole is manufactured in the form of an upper light-tight guide, and the mortar is integrated with the girder And the cushioning member is cushioned in a wedge shape to provide a hooking portion where the precast panel is hooked, the hooking member being formed in a plate shape to be hooked on the upper portion of the mortar injection hole, ; At least one concave-convex fixed portion formed on a part of the outer circumferential surface to increase an area of contact with the mortar, and a head portion of the concave portion is engaged with the support plate and a lower portion thereof is fastened to the girder to provide an adhesive force between the precast panel and the girder, volt; And a plurality of grooves formed in the lower part of the support plate in a quantity corresponding to the quantity of the core bars, the grooves facing the upper end of the grooves, the grooves being pressed by the mandrel as the fixing bolts are fastened, And a plurality of blades connected to the mortar in an inclined state to prevent vertical movement of the support plate.

Description

Prefabricated Precast Concrete Bridge Deck {PREFABRICATED PRECAST CONCRETE BRIDGE DECK}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated bridge and a construction method thereof, and more particularly, to a prefabricated precast concrete bridge deck having a prefabricated precast concrete, .

If a precast concrete bridge deck is laid on a mold, a narrow gap is created between the bridge deck and the mold, and this narrow gap should be filled with a suitable filler and bonded. At this time, both ends of the upper surface of the mold are sealed so as to prevent the filled filler from leaking out of the gap.

A conventional method of filling a gap between a bridge deck and a mold with filler is as follows. Prior to placing the precast concrete bridge deck on the upper part of the mold, After installing a plate, install a workbench under the bridge.

Then, the gap between the bottom plate and the mold is sealed with filler at both ends of the upper surface of the mold by using a joint filler to seal between the precast concrete bridge deck and the mold. This prevents the filler from leaking through the crevice. Then pour filler through the shear pockets to fill the gap between the bridge deck and the mold.

However, such a conventional construction method has a problem in that it is difficult to install the work platform in a working condition where it is difficult to install the work platform under the bridge, such as the mountains or the sea, and the cost and construction period due to installation of the work platform are increased.

An example for solving such a problem is disclosed in Korean Patent Application No. 10-1998-0035965 'Precast Concrete Bridge Deck and Coupling Method Between Joints'.

 The present invention relates to a method of joining a precast concrete bridge deck to a joint between molds, more specifically, in a process of assembling a precast concrete deck to complete a bottom plate of a bridge, In order to fill the narrow gap between the mold placed in the same direction and the precast concrete bridge deck laid on it, precast concrete which can fill the narrow gap with filler without installing a separate workbench under the bridge The present invention relates to a method for joining a bridge deck to a bridge.

Therefore, when filling a narrow gap between the precast concrete bridge deck and the mold with the filling material, it is possible to assure a reliable sealing performance. Further, in order to maintain a predetermined gap between the bottom plate and the bottom plate, When the plate is tightened, slippage is allowed between the precast bottom plate and the filling material leakage preventing tape, and it is not restored to the original position, so that a predetermined object can be achieved.

In addition, when the lower workbench is difficult to install, such as at sea or in a mountainous region, since it is not necessary to install a bridge lower workbench, it is possible to prevent worker safety accidents, shorten the air, and reduce construction cost.

On the other hand, up to now, the bridge top plate is mostly on-site cast concrete, and there is concern about lack of construction management and quality deterioration, and it is necessary to maximize the precast bridge top plate technology of factory prefabrication to minimize the installation of the factory due to development of production technology.

In the prior art, a part of the upper plate is precasted, the lateral connection on the girder is dependent on the installation of the field, and the upper plate auxiliary facilities such as roofing are additionally installed on the site.

It is necessary to integrate the auxiliary facilities including the curb and the drainage, and to make it pre-manufactured, and to minimize the field installation and additional on-site assembly.

Korean Registered Patent No. 10-0296420 (Title of the Invention: Method of Joining Precast Concrete Bridge Decks and Joints between Molds)

The present invention provides a prefabricated prefabricated concrete bridge deck which is manufactured in a manner to minimize the installation of the on-site concrete and shorten the construction period by assembling an upper plate of the concrete bridge, The purpose.

Another object of the present invention is to provide a prefabricated precast concrete bridge deck having a function of simplifying the work and shortening the construction time by integrally assembling auxiliary facilities of the bridge top plate and assembling the bridge precisely without any work in the field .

Another object of the present invention is to provide a prefabricated precast concrete bridge deck having the functions of enhancing the adhesion of the prefabricated concrete bridge.

In order to accomplish the above object, the prefabricated precast concrete bridge deck of the present invention is a bottom plate installed on an upper part of a bridge pier to provide a supporting force and forming a bridge together with bridge piers, A girder providing space for the structure to be placed; At least one sheath pipe is formed in a predetermined size and is placed on the girder and is made up of a plurality of sheath pipes which are mutually connected to each other to form an upper plate of the bridge, And at least one falling-off preventing curb on which a steel guide rail or an impact absorber is installed at an upper portion to prevent a vehicle from falling down. A precast panel formed respectively; And a panel connector for fixing the precast panel and the girder, wherein a plurality of the panel connectors are formed in a portion corresponding to the girder so as to penetrate the upper and lower portions, ; A mortar which is injected into the mortar injection holes and couples the precast panel and the girder through curing; A mandrel which is integrally coupled to the upper portion of the girder and is disposed inside the mortar injection hole and has at least one unevenness formed on an outer circumferential surface thereof to increase a contact area with the mortar; And a contact member, which is installed before the mortar is injected and provides an adhesion force between the precast panel and the girder, wherein the mortar injection hole is manufactured in the form of an upper light-tight guide, and the mortar is integrated with the girder And the cushioning member is cushioned in a wedge shape to provide a hooking portion where the precast panel is hooked, the hooking member being formed in a plate shape to be hooked on the upper portion of the mortar injection hole, ; At least one concave-convex fixed portion formed on a part of the outer circumferential surface to increase an area of contact with the mortar, and a head portion of the concave portion is engaged with the support plate and a lower portion thereof is fastened to the girder to provide an adhesive force between the precast panel and the girder, volt; And a plurality of grooves formed in the lower part of the support plate in a quantity corresponding to the quantity of the core bars, the grooves facing the upper end of the grooves, the grooves being pressed by the mandrel as the fixing bolts are fastened, And a plurality of blades connected to the mortar in an inclined state to prevent vertical movement of the support plate.

The contact member may further include a post that protrudes downward from a portion of the lower portion of the support plate to increase a contact area with the mortar.

The contact member may further include a plurality of post protrusions protruding from the sides of the post to increase a contact area with the mortar.

The prefabricated precast concrete bridge deck of the present invention can be manufactured in a prefabricated manner without curing in the field by using a precast girder, thereby minimizing the installation time of the concrete and shortening the construction period.

In addition, since the fall-resistant curb is integrally formed on the precast panel, it can be assembled only by assembling without any work in the field, thereby simplifying the work and shortening the construction time, thereby reducing the cost.

Further, it is possible to manufacture the mortar joint hole by forming the mortar joint hole at a lower limit of the upper beam, or by providing a frictional force by changing the cross section of the fastening bolt, thereby enhancing the adhesion force of the prefabricated concrete bridge deck.

In addition, wings and posts are formed in the lower part of the support plate, and the wing is inclined by the pressing force of the fixing bolts, thereby preventing the support plate from vertically deviating from the upper and the lower plate by engaging with the mortar, Can be improved.

Therefore, it is expected to reduce the national budget by reducing the national budget through the reduction of construction cost, the structure technology of the integrated precast bridge deck, and the new business supply structure to improve the order - distribution structure.

1 is a perspective view of a precast panel of a prefabricated precast concrete bridge deck according to an embodiment of the present invention.
FIG. 2 is a plan view of the concrete bridge bottom plate contact member. FIG.
3 is an AA cross-sectional view of the tightening member.
4 is a cross-sectional view taken along line BB of the contact member.
5 is a view showing a state where the center of the concrete bridge deck is aligned.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It should also be understood that the position or arrangement of individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

FIG. 1 is a perspective view of a precast panel of a prefabricated precast concrete bridge deck according to an embodiment of the present invention, FIG. 2 is a plan view of the concrete bridge bottomframe contact member, FIG. 3 is an AA cross- 4 is a cross-sectional view taken along the line BB of the contact member, and FIG. 5 is a view showing a state where the center of the concrete bridge bottom plate is aligned.

As shown in Figs. 1 to 5, the present invention is a bottom plate provided on the top of a pier which provides a supporting force and constituting a bridge together with a pier, and includes a girder 50, a precast panel 100 and a panel connector 200 ). ≪ / RTI >

The girder 50 is a component that is provided on the bridge pier while connecting the piers to provide space for the upper structure to be placed.

The precast panel 100 is constructed to have a predetermined size and is placed on a girder 50. The precast panel 100 has at least one sheath tube 110 And at least one falling prevention curb 150 protruding from one side along the longitudinal direction to prevent a vehicle from falling down and having a guide rail or an impact absorber made of iron on the top, And may have a male-like projection and a groove formed in the abutting portion in order to align the center of each other.

In addition, the worker can vary the height of the fall-preventing curb 150 and install the guide rail or the shock absorber on the top of the fall-preventing curb 150 in the field.

Here, referring to precast concrete, precast concrete is a reinforced concrete member formed by molding in a mold in a factory, which is abbreviated as PC. It has a fixed facility in the factory and it is manufactured by steel formwork, and it is manufactured in the hot and humid steam room for short-term maintenance. The product is transported to the construction site, Construction can be done.

The abbreviation PC (precast's initial letter) means "pre-baked", a member made by the factory, and the overpass is an example of the overpass. In some cases, the entire building is assembled with a PC using pillars and slabs. If you make pre-beam in the field in advance, it is also PC concrete.

Further, the sheath tube 110 generally uses a post tension among the prestress structures. In order to do so, the position of the steel wire must be held before the concrete is poured, and the space of the steel wire must be filled with the concrete so that the steel wire can be pulled after the concrete is cured.

That is, there is a steel wire inside the sheath pipe 110, and the post tension method is to pull the steel wire to fix it and then to grout or not. Generally, the sheath tube 110 is thinner enough to be bent by hand.

The panel connector 200 is a component for fixing the precast panel 100 and the girder 50.

The panel connector 200 may include a mortar injection hole 210, a mortar 220, a mandrel 240, and a contact member 230.

A plurality of mortar injection holes 210 are formed in the portions corresponding to the girders 50 so as to pass through the upper and lower portions, thereby providing a space for coupling with the girders 50.

The mortar 220 may be injected into the mortar injection hole 210 to bond the precast panel 100 and the girder 50 through curing.

That is, the role of the mortar 220 and the mortar injection hole 210 is to firmly bond the precast panel 100 and the girder 50 to ultimately complete a macroporous structure such as a concrete bridge.

Therefore, in order to meet the above-mentioned object, the constructor can design various methods, and the present invention is realized by changing the shape of the mortar injection hole 210.

Specifically, the operator can mold the mortar 220 into a wedge shape integrated with the girder 50 by forming the mortar injection hole 210 in the shape of a vertical beam so that the hook portion where the precast panel 100 is hooked The adhesion between the precast panel 100 and the girder 50 can be improved.

That is, the mortar 220 injected into the mortar injection hole 210 is cured integrally with the fixed girder 50 with the fixing bolt 234 formed thereon, thereby forming a three-dimensional trapezoidal shape having a wide upper portion and a narrower lower portion, To the precast panel 100. The precast panel 100 is a flat plate.

The mandrel 240 is made of a steel material and is integrally coupled to the upper portion of the girder 50 and disposed inside the mortar injection hole 210. At least one unevenness is formed on the outer circumferential surface of the mandrel 240, The area can be increased.

The worker can construct the mandrel 240 in a state where the mandrel 240 is integrally manufactured at a factory in the process of manufacturing the girder 50 or directly welded in the field.

The worker can easily improve the tightening force between the girder 50 and the precast panel 100 while simplifying the construction using the mandrel 240. [

The adhesion member 230 may be installed before the mortar 220 is injected to provide an adhesion between the precast panel 100 and the girder 50. [

The contact member 230 may include a support plate 232, a fixing bolt 234, and a blade 232-1.

The support plate 232 may be formed in a plate shape to be hung on the upper portion of the mortar injection hole 210 to provide adhesion between the precast panel 100 and the girder 50.

The fixing bolt 234 is formed on a part of the outer circumferential surface of the fixing bolt 23 and is attached to the support plate 232 and the lower part is fastened to the girder 50 to provide the adhesion between the precast panel 100 and the girder 50, 220 may be at least one concavo-convex structure.

The vanes 232-1 are provided in the lower part of the support plate 232 in an amount corresponding to the number of the mandrels 240 so as to face the upper ends of the mandrels 240. As the fixing bolts 234 are fastened And may have a plurality of configurations to prevent vertical flow of the support plate 232 by connecting the support plate 232 and the mortar 220 in an inclined state.

The contact member 230 may further include a post 228 and a post protrusion 228-1.

The post 228 may project a portion of the lower portion of the support plate 232 downward to increase the contact area with the mortar 220.

The post protrusion 228-1 may be a plurality of structures protruding from the sides of the post 228 to increase the contact area with the mortar 220. [

As a method of constructing the prefabricated precast concrete bridge deck according to the present invention, an operator can perform work while passing through a panel connection step, a fixing bolt fixing step, a mortar injection step, a steel wire insertion step and the like.

In the panel connecting step, the precast panels 100 are placed on the girders 50 and connected to each other by using a pair of male and female pairs of centering members 160 formed on a cross section of the precast panel 100, The fixing bolt 234 is fastened to the girder through the mortar injection hole 210 of the connected precast panel 100. The mortar injection step is performed by inserting the mortar 220 into the mortar injection hole 210 into which the fixing bolt 234 is fastened, The precast panel 100 and the girder 50 are attached through curing and the steel wire tensed by the sheath pipe 110 formed in the precast panel 100 connected to each other can be inserted .

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And such variations and modifications are intended to fall within the scope of the appended claims.

50: girder
100: Precast panel
110: Sheath tube
150: Fall-proof curb
200: Panel connector
210: mortar injection hole
220: mortar
230:
232: Support plate
232-1: wing
233: Post
233-1: Post projection
234: Fixing Bolt
240: mandrel

Claims (3)

A bottom plate provided on an upper portion of a pier providing a supporting force and constituting a bridge together with a pier,
A girder installed on the pier while connecting the bridge piers to provide a space in which the upper structure is to be placed;
At least one sheath pipe is formed in a predetermined size and is placed on the girder and is made up of a plurality of sheath pipes which are mutually connected to each other to form an upper plate of the bridge, And at least one falling-off preventing curb on which a steel guide rail or an impact absorber is installed at an upper portion to prevent a vehicle from falling down. A precast panel formed respectively; And
And a panel connector for fixing the precast panel and the girder,
Wherein the panel connector comprises:
A plurality of mortar injection holes formed in portions corresponding to the girders so as to penetrate upper and lower portions to provide a space for coupling with the girders;
A mortar which is injected into the mortar injection holes and couples the precast panel and the girder through curing;
A mandrel which is integrally coupled to the upper portion of the girder and is disposed inside the mortar injection hole and has at least one unevenness formed on an outer circumferential surface thereof to increase a contact area with the mortar; And
And a tightening member that is applied before the mortar is injected and provides an adhesion force between the precast panel and the girder,
Wherein the mortar injection hole
And the mortar is cured in the form of a wedge integrated with the girder so as to provide a hooking portion where the precast panel is hooked,
The tight contact member
A support plate that is formed in a plate shape to be hung on an upper portion of the mortar injection hole and provides an adhesion force between the precast panel and the girder;
At least one concave-convex fixed portion formed on a part of the outer circumferential surface to increase an area of contact with the mortar, and a head portion of the concave portion is engaged with the support plate and a lower portion thereof is fastened to the girder to provide an adhesive force between the precast panel and the girder, volt; And
And a plurality of fixing bolts which are provided in the lower part of the support plate in a quantity corresponding to the number of the mandrels, respectively facing the upper ends of the mandrels, and being pressed by the mandrels as they are fastened, And a plurality of blades connected to the mortar in an inclined state to prevent vertical flow of the support plate.
The method according to claim 1,
The tight contact member
Further comprising a post projecting a portion of the lower portion of the support plate downward to increase a contact area with the mortar.
The method of claim 2,
The tight contact member
Further comprising a plurality of post protrusions protruding from side surfaces of the posts to increase a contact area with the mortar.

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