KR102427300B1 - Precast slab bridge using continuous slab and construction method thereof - Google Patents

Abstract

The precast slab is made continuous by installing cast-in-place concrete or precast continuous slab at the continuous point of the multi-span bridge. Disclosed are a slab bridge and a construction method thereof, wherein the precast slab bridge includes: precast slabs installed to face each other by being spaced apart from each other in the longitudinal direction at the continuous point portion (A) of the bridge lower structure; and a continuous slab formed so that the lower portions of the precast slabs are spaced apart from each other and the upper portions of the precast slabs are continuous with each other.

Description

Precast slab bridge using continuous slab and its construction method

The present invention relates to a precast slab bridge using a continuous slab and a construction method therefor. More specifically, the precast slab is made continuous by installing cast-in-place concrete or precast continuation slab at the continuous point of the multi-span bridge, but a continuous slab that can be constructed without installing expansion joints at the continuous point. It relates to the used precast slab bridge and its construction method.

1a is an exemplary view of a continuous construction method of a conventional precast girder.

According to Figure 1a, a continuous point portion is formed in which the pier 30 and the girder 60 are connected to each other, and the girder 60 connected to each other in the longitudinal direction at this continuous point portion is manufactured in the form of a plate by a precast method. it can be seen that

At this time, the pier 30 is a column structure in which the coping part is formed at the top, and is connected by mounting the girder 60 on the upper surface of the coping part so as to be longitudinally spaced apart from each other,

In the case of Figure 1a, a separate U-shaped cross-section transverse girder 20 is installed on the upper part of the pier, and after setting the connecting ends of both girders 60 to be placed on the upper surface of the transverse girder, the transverse girder 20 The connecting reinforcing bars 28 of the upper surface and the connecting reinforcing bars 27 of the girder are connected to each other,

It can be seen that the continuous point part filler such as non-shrinkable mortar and concrete and the continuous branch part formwork are used for construction so that all the connecting ends of the connecting members are buried and integrated in the continuous branch part.

Accordingly, it can be seen that the pier 30, the transverse girder 20, and the connecting end of the girder 60 are constructed so as to be integrated by the continuous point filler material and behave.

Figure 1b is an exemplary view of a continuous construction method of a conventional precast deck.

That is, the bridge girder uses the steel girder 1, and the connecting end of the precast deck 70 with the shear reinforcement 71 formed on the upper surface of the steel girder is mounted to be mounted, and the shear connecting material on the upper surface of the steel girder 1 (9) is installed, so it can be seen that the slab is integrally constructed by pouring concrete (not shown) on the upper surface of the steel girder 1 and the upper surface of the precast deck 70 at a constant thickness.

That is, when constructing a conventional bridge in a multi-span method, the end of the girder mounted to face each other in a longitudinal direction on the upper surface of the pier is formed with continuous point fillers such as non-shrinkable mortar and concrete together with or separately from the slab concrete. It can be seen that the continuous point of the bridge and the slab are integrated and constructed by this method.

However, an expansion joint device (not shown) is installed at these continuous points to absorb the shrinkage of the slab due to temperature to prevent cracks and damage. There was a limit to what could inevitably occur.

Figure 1c is a construction example of a continuous point portion of the conventional precast slab (10).

That is, the precast slab 10 is mounted between the pier 12 and the abutment 11 so that the bottom surface of the end is supported,

The end surface of the precast slab 10 has a connecting steel material 13 formed thereon, so that the end surface of the precast slab 10 is in contact with each other using an adhesive 14 horizontally. It can be seen that it is set to be compressed using

It can be seen that the precast slab 10 is formed with a continuous point filler (C) such as non-shrinkable mortar and concrete so that the entire end surface of the precast slab 10 is integrated with each other.

That is, according to Figures 1a to 1c, it can be seen that the conventional girder, deck and precast slab are constructed in such a way that the ends are spaced apart from each other at the continuous point part, and the entire ends are integrated with each other.

Therefore, expansion joints need to be installed at continuation points. In this case, problems such as deterioration of vehicle drivability and noise generation, as well as problems such as deterioration of bridge bearings due to leakage at the construction site of expansion joints due to poor management Since there is a limit that can occur, in particular, a construction method that makes it possible to construct continuous junctions of multi-span bridges without installing expansion joints in precast slab bridges has not been specifically introduced otherwise.

0001) Korean Patent No. 10-1519086 (Title of Invention: Bridge and Bridge Construction Method Using Precast T-Girder, Publication Date: May 12, 2015) 0002) Republic of Korea Patent Publication No. 10-2009-0066558 (Title of the invention: continuous precast panel bottom plate, publication date: June 24, 2009) 0003) Korean Patent No. 10-0398021 (Title of the invention: Prestressed concrete slab with embedded section steel and short, multi-span bridge construction method using the same, publication date: May 23, 2002)

Accordingly, the present invention provides a multi-span bridge in which the ends spaced apart from each other in the continuous branch are integrated with each other as a filler in the continuous branch, so that they can be continuous without installing an expansion joint. It is a technical task to solve the provision of a precast slab bridge using a continuous slab that can solve problems caused by installation of the device and its construction method.

In addition, the present invention integrates the entire cross section of the slab bridge with each other so that the installation of high rigidity reinforcement (connecting steel) is not required in order to prevent the phenomenon that cracks are concentrated on the upper part of the cross section of the continuous point part. It is a technical task to solve the provision of a precast slab bridge and its construction method using a continuous slab that does not deteriorate durability due to cracks by distributing cracks that occur on the upper part of the cross section by connecting only a part of it over a certain length.

The precast slab bridge using the continuous slab of the present invention for achieving the above technical problem includes: a precast slab installed to face each other by being spaced apart from each other in the longitudinal direction at the continuous point portion (A) of the bridge lower structure; and a continuous slab formed so that the lower portions of the precast slab are spaced apart from each other and the upper portions are continuous with each other; including, without installing an expansion joint device at the continuous point portion (A), the longitudinal direction of the precast slab The expansion and contraction are absorbed at the expansion joints installed at the start and end points of the continuous bridge, and the precast slab is a reinforced concrete horizontal plate member with an end face formed by blocking out from the upper end face down to a blockout part (S) ) formed by the upper end surface; and a lower end surface formed as an end surface of the precast slab as a lower portion of the block-out portion (S), wherein the precast slab includes a block-out portion (S) between the upper end surfaces of the precast slab facing each other ), a precast continuation slab having a shear groove formed therein is inserted and integrated to accommodate the shear reinforcement formed on the upper surface of the upper end surface, so that the upper end surface and the lower end surface are spaced apart from each other by the spaced apart precast slab However, the lower part is not continuous with each other, and the block-out part (S) formed on the upper part is made to be continuous with each other by a precast continuation slab, and the shear groove is formed through the precast continuation slab, and thus, the shear groove After setting the shear reinforcing bars to cross each other in the exposed shear grooved reinforcing bars to cross the inside horizontally, the precast continuous slab is integrated with each other through finishing grouting.

In addition, the precast slab bridge construction method using the continuous slab of the present invention for achieving the above technical problem,

(a) as a bridge substructure, the piers are vertically spaced apart from each other between the two abutments to form a continuous point portion (A); (b) allowing the precast slabs to be mounted at a distance from each other at the continuous point portion (A); and (c) installing the continuous slab to be inserted into the block-out part (S) of the precast slab facing each other; The continuous slab is installed to face each other, and the continuous slab is formed so that the lower part of the precast slab is spaced apart from each other, and the upper part is formed to be continuous with each other, without installing an expansion joint device at the continuous point part (A) , so that the longitudinal expansion and contraction of the precast slab is absorbed at the expansion joint installed at the beginning and end of the continuous bridge,
The precast slab of step (c) is a reinforced concrete horizontal plate member having an end surface formed therein, and includes an upper end surface formed by a block-out portion (S) formed by blocking out from the upper end surface downward; and a lower end surface formed as an end surface of the precast slab as a lower portion of the block-out portion (S), wherein the precast slab includes a block-out portion (S) between the upper end surfaces of the precast slab facing each other ), a precast continuation slab having a shear groove formed therein is inserted and integrated to accommodate the shear reinforcement formed on the upper surface of the upper end surface, so that the upper end surface and the lower end surface are spaced apart from each other by the spaced apart precast slab However, the lower part is not continuous with each other, and the block-out part (S) formed on the upper part is made to be continuous with each other by a precast continuation slab, and the shear groove is formed through the precast continuation slab, and thus, the shear groove After setting the shear reinforcement bars to cross each other in the shear groove reinforcement exposed so as to cross the inside horizontally, the precast continuation slab is integrated with each other through finishing grouting.

According to the present invention, in a state where the lower end of the precast slab is formed spaced apart from each other at the continuous point, only the upper end of the end is made continuous using the continuous slab. It behaves as a simple support type to absorb longitudinal expansion and contraction, and since the upper part is continuous, it is possible to eliminate the need for a separate expansion joint device, thereby solving the problem of bridge defects.

In addition, as the entire cross section of the slab bridge is integrated with each other, only a portion of the upper portion of the cross section of the slab is fixed so that the installation of high rigidity reinforcement (connecting steel) is not required to prevent the phenomenon of cracks concentrated on the upper portion of the cross section of the continuous point. By distributing cracks generated in the upper part of the cross-section by connecting more than the length, it is possible to prevent deterioration of durability due to cracks.

In addition, since the continuous slab can use cast-in-place or precast continuous slab, it is possible to effectively construct a precast slab bridge using the continuous slab depending on the site.

1a is an exemplary view of a continuous construction method of a conventional precast girder
Figure 1b is an exemplary view of a continuous construction method of a conventional precast deck
1c is a construction example of a continuous point part of a conventional precast slab;
2 and 3 are a construction example of a continuous point part of a precast slab bridge using a continuous slab according to the present invention;
4a, 4b, 4c, 4d and 4e are construction flow charts of continuous points of a precast slab bridge using a continuous slab made of cast-in-place concrete of the present invention.
5a, 5b and 5c are construction flow charts of continuous points of the precast slab bridge using the precast continuous slab of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

[Precast slab bridge 100 using continuous slab of the present invention]

2 and 3 show a construction example of a continuous point part of the precast slab bridge 100 using the continuous slab 120 according to the present invention.

The precast slab bridge 100 using the continuous slab 120 is a bridge substructure 130 in a state in which the pier 131 is first constructed.

It is a slab bridge in which the bridge is constructed by directly mounting the precast slab 110 to be spaced apart from each other using the bridge bearing 133 without installing a girder on the upper surface of the pier 131 as the continuous point portion (A).

At this time, the lower end portions of the precast slab 110 are not integrated to be spaced apart from each other, and the continuous slab 120 is formed in the block-out portion S formed on the upper end portion to be integrated with each other.

As a result, only the upper part of the precast slab 110 is continuously constructed, but the lower part is not continuous and is spaced apart to absorb the longitudinal expansion and contraction of the precast slab, so there is no need to install an expansion joint. , it is possible to prevent defects such as corrosion, and it is possible to secure drivability of a vehicle running on the upper surface of the precast slab 110 .

At this time, the precast slab 110,

As shown in FIG. 2, the continuous slab 120 and

As shown in FIG. 3, the precast continuous slab 120 is used to enable application according to the field.

Therefore, first, the precast slab bridge 100 using the continuous slab 120 of the present invention according to FIG. 2 includes the precast slab 110, the continuous slab 120 by the cast-in-place concrete, and the bridge lower structure 130. will include

As shown in FIG. 2, the precast slab bridge 100 is constructed in the bridge lower structure 130, and in particular, it is continuous by cast-in-place concrete at the continuation point part A based on the upper part of the pier 131 constructed between the abutments. Using the slab 120, only the upper end of the precast slab 110 is integrated with each other and connected.

At this time, the continuous point portion (A) may be referred to as a section from the pier 131 to the position spaced apart in both sides.

As the bridge lower structure 130, the pier 131 is constructed of concrete so as to extend upward to the ground as shown in FIG. It is constructed with various cross-sections by cast-in-place concrete or precast method.

Accordingly, it can be seen that the precast slab 110 is constructed so as to be continuous in the longitudinal direction on the upper surface of the pier 131 .

As shown in FIG. 2, the precast slab 110 is formed in a rectangular cross section in a range that can be transported and installed as a horizontal plate member of reinforced concrete in a factory in advance to have a constant thickness, and in particular, continuous point portions in the longitudinal direction. It is mounted on the upper surface of the pier of (A), and for continuation, the continuation reinforcing bar 111 is drawn out and formed horizontally from the upper end surface to be used.

At this time, the end surface is set to be longitudinally spaced apart from each other in the upper space of the upper surface of the pier 131 and is divided into an upper end surface 112 and a lower end surface 113 .

In the present invention, the upper end surface 112 is formed to be spaced apart from the original end surface by the block-out portion (S) formed by blocking out the upper end of the precast slab 110 downward from the upper surface of the precast slab 110, as shown in FIG. This block-out portion (S) is formed in the form of a groove having a predetermined depth and width based on the end edge of the end surface.

In addition, it can be seen that the lower end surface 113 is initially formed as an end surface of the precast slab 110 as the lower portion of the block-out portion S.

It can be seen that the shear reinforcement 114 is formed on the upper surface of the block-out part S so as to be located below the continuous reinforcement 111,

It can be seen that the continuous reinforcing bars 111 formed extending from the upper end surface are connected to each other by the continuous point reinforcing bars 115 .

Accordingly, the upper end surface 112 and the lower end surface 113 are set to be spaced apart from each other by both precast slabs 110 spaced apart from each other, but the lower portions are not continuous with each other, and the block-out portion (S) formed on the upper portion It can be seen that they are continuous with each other by the continuous slab 120 made of cast-in-place concrete.

It can be seen that the longitudinal expansion and contraction of the precast slab 110 can be absorbed at the end of the precast slab, so that there is an effect that there is no need to install an expansion joint differently at the continuation point part.

Next, the continuous slab 120 by the cast-in-place concrete is cast-in-place concrete poured into the block-out part S between the upper end surfaces 112 facing each other of the precast slab 110 as shown in FIG. 2 . As shown in FIG. 2 , the continuous reinforcing bar 111 , the shear reinforcing bar 114 , and the continuous branch reinforcing bar 115 are formed to be embedded.

To this end, it can be seen that the separation form 116 is installed so as to span the upper surfaces of both lower end surfaces 113 facing each other, and the continuous slab 120 is formed by cast-in-place concrete.

This spaced formwork 116 forms a form receiving groove 117 on the upper surfaces of both lower end surfaces 113 facing each other in advance to insert the spaced formwork 116 into the form receiving groove 117. When installed, the spaced apart It can be seen that the upper surface of the formwork 116 can be set to the same height as the upper surface of both lower end surfaces 113, and unlike the lower part of the precast slab 110, cast-in-place concrete is not poured. Able to know.

Next, the precast slab bridge 100 using the continuous slab 120 of the present invention according to FIG. 3 includes the precast slab 110, the precast continuous slab 120, and the bridge substructure 130, FIG. In contrast to 2, there is a difference in using a continuation slab 120 manufactured by a precast method.

Accordingly, the precast slab bridge 100 is constructed on the bridge lower structure 130, as shown in FIG. 3, and in particular, the precast continuation slab ( Using 120), only the upper end of the precast slab 110 is integrated and connected to each other.

At this time, the continuous point portion (A) is the same as meaning a section from the pier 131 to the position spaced apart in both sides.

As the bridge lower structure 130, the pier 131 is also constructed of concrete so as to extend upward to the ground as shown in FIG. It is constructed as much as possible, and it is constructed with various cross sections by cast-in-place concrete or precast method.

It is the same that the precast slab 110 is constructed so that the precast slab 110 is continuous in the longitudinal direction on the upper surface of the pier 131 .

The precast slab 110 is, as shown in FIG. 3, used as a reinforced concrete horizontal plate member in the factory in advance to have a constant thickness, and is formed in a rectangular cross-section within the range that can be transported and installed, in particular, continuous points in the longitudinal direction. It is mounted on the upper surface of the pier of the part (A), but it can be seen that the reinforcing bar 111 is not drawn out horizontally from the upper end surface, unlike in FIG. 2 .

At this time, the end surfaces are set to be longitudinally spaced apart from each other in the upper space of the upper surface of the pier 131 , and the separation into the upper end surface 112 and the lower end surface 113 is the same.

According to the present invention, the upper end surface 112 is formed spaced apart from the original end surface by the block-out portion S formed by blocking out the upper end surface of the precast slab 110 downward as shown in FIG. 3 . As can be seen, the block-out portion (S) is formed in the form of a groove having a predetermined depth and width based on the end edge of the end surface.

In addition, it can be seen that the lower end surface 113 is also formed as an end surface of the precast slab 110 as a lower portion of the block-out portion S.

It can be seen that the shear reinforcement 114 is formed on the upper surface of the block-out portion S, and since the continuous slab 120 manufactured by the precast method is used, the continuous reinforcement set to face each other unlike in FIG. 2 ( It can be seen that 111) and the continuous branch reinforcement 115 are not formed.

Also according to FIG. 3, it can be seen that the upper end surface 112 and the lower end surface 113 are set to be spaced apart from each other by the precast slab 110 spaced apart from each other, and the lower portions facing each other are not continuous with each other, It can be seen that the upper block-out portion S is continuous with each other by the precast continuation slab 120 .

Accordingly, the lower portions of the precast slab 110 facing each other are spaced apart from each other without being continuous, so that the longitudinal expansion and contraction of the precast slab 110 can be absorbed, thereby eliminating the need to install an expansion joint. same.

The precast continuation slab 120 is installed by being inserted into the block-out portion S between the upper end surfaces 112 of the precast slab 110 facing each other, and the precast slab 110 is lifted and installed in advance. .

In the block-out portion (S), the continuous reinforcing bar 111, the shear reinforcing bar 114, and the continuous branch reinforcing bar 115 are not formed differently, and a shear groove 121 is formed to accommodate the shear reinforcing bar 114. It can be seen that it has been

Accordingly, it can be seen that the shear groove 121 is formed to penetrate the precast continuous slab 120 , and the shear reinforcement 114 is inserted into the shear groove 121 .

Usually, by finishing the shear groove 121 through finishing grouting, the precast continuous slab 120 is integrated with the precast slab 110 with each other,

In the present invention, after setting the shear reinforcement 114 to cross each other in the shear groove reinforcement 122 exposed to cross the interior of the shear groove 121 horizontally, the precast continuation slab 120 is precast through finishing grouting. It is to be integrated with the cast slab 110 with each other.

[Construction method of precast slab bridge 100 using continuous slab of the present invention]

4a to 4e are construction flow charts of the precast slab bridge 100 using the continuous slab 120 by cast-in-place concrete according to the present invention;

Figures 5a to 5c shows a construction example of a continuous point portion of the precast slab bridge 100 using the precast continuous slab 120 according to the present invention.

First, FIGS. 4a to 4e show the construction method of the precast slab bridge 100 using the continuous slab 120 by cast-in-place concrete according to the present invention.

First, as shown in FIG. 4A , it can be seen that, as the bridge lower structure 130 , the piers 131 are vertically spaced apart from each other between the two abutments 132 .

As the bridge substructure 130, the pier 131 and the abutment 132 are constructed of concrete to extend upward on the ground as shown in FIG. It is constructed such that the bottom surface is supported, and it is constructed in various cross-sections by cast-in-place concrete or precast method, as has been seen. It can be seen that this is being done.

Next, as shown in FIG. 4b, it can be seen that the precast slab 110 is mounted between the abutment 132 and the pier 131 to be constructed, and the precast slab 110 is mutually in the continuation point (A). ) is spaced apart and mounted.

These precast slabs 110 are formed in a rectangular cross-section within the range that can be transported and installed in advance as a reinforced concrete horizontal plate member at a factory to have a certain thickness, and are mounted on the upper surface of the piers of the continuous points (A) in the longitudinal direction. , the continuation reinforcing bar 111 is drawn out horizontally from the upper end surface 112 for continuation,

The end surface is set to be longitudinally spaced apart from each other in the upper space of the upper surface of the pier 131 and is divided into an upper end surface 112 and a lower end surface 113,

It can be seen that the shear reinforcement 114 is formed on the upper surface of the block-out part S,

It can be seen that the form accommodating grooves 117 are formed on the upper surfaces of both lower end surfaces 113 facing each other so that the spaced formwork 116 can be installed so as to span the upper surfaces of both lower end surfaces 113 facing each other. .

Next, it can be seen that, as shown in FIG. 4c , the formwork 116 for spacing is installed so that the continuous slab 120 by the cast-in-place concrete is formed in the form-accommodating groove 117 .

As a result, the cast-in-place concrete does not leak downward into the space between both lower end surfaces 113 .

Next, it can be seen that, as shown in FIG. 4D , the continuous reinforcing bars 111 horizontally drawn out from the upper end surface 112 are connected to each other by the continuous reinforcing bars 115 .

Accordingly, it is possible to integrate the precast slabs 110 spaced apart to face each other in the longitudinal direction.

Next, as shown in Fig. 4e, the continuation reinforcing bar 111, shear reinforcing bar 114, and continuous branch reinforcing bar 115 formed inside the block-out part (S) with the upper surface of the separation form 116 are embedded in concrete cast-in-place. By pouring, the lower end surfaces 113 facing each other of the precast slab 110 are not continuous with each other, and the block-out part S is continuous with each other by the continuation slab 120 by the cast-in-place concrete, and Able to know.

Next, looking at the construction method of the precast slab bridge 100 using the precast continuous slab 120 according to the present invention, FIGS. 5A to 5C are,

First, as shown in FIG. 5A , it can be seen that, as the bridge lower structure 130 , the piers 131 are vertically spaced apart from each other between the two abutments 132 .

As the bridge substructure 130, the pier 131 and the abutment 132 are also constructed of concrete to extend upward on the ground, as shown in FIG. It is constructed such that the bottom of the end is supported, and the construction is the same as being formed in various cross-sections by cast-in-place concrete or precast method. It can be seen that this is being done.

Next, as shown in FIG. 5b, it can be seen that the precast slab 110 is mounted between the abutment 132 and the pier 131 for construction, and the precast slab 110 is mutually in the continuation point (A). ) is spaced apart and mounted.

These precast slabs 110 are formed in a rectangular cross section within the range that can be transported and installed as a reinforced concrete horizontal plate member in the factory in advance so as to have the same constant thickness, and are continuous with each other in the longitudinal direction. It can be seen that the continuous reinforcing bar 111 is not drawn out otherwise.

Also, the end surface is set to be longitudinally spaced apart from each other in the upper space of the upper surface of the pier 131 and is divided into an upper end surface 112 and a lower end surface 113,

It can be seen that the shear reinforcement 114 is formed on the upper surface of the block-out part S,

It can be seen that the mold receiving groove 117 is formed on the upper surfaces of both lower end surfaces 113 facing each other,

Since the precast continuous slab 120 is used, it is not necessary to install the separation form 116 .

Next, as shown in FIG. 5c , the precast continuation slab 120 is installed to be inserted into the block-out part S of the precast slab 110 facing each other.

This precast continuation slab 120 is installed to be inserted into the block-out part S between the upper end surfaces 112 facing each other of the precast slab 110, and is installed by lifting the one manufactured in the factory in advance. , it can be seen that the shear groove 121 is formed to accommodate the shear reinforcing bar 114 .

Accordingly, it can be seen that the shear groove 121 is formed to penetrate the precast continuation slab 120 and the shear reinforcing bar 114 is inserted into the shear groove 121. After setting the shear reinforcement 114 to cross each other in the shear groove reinforcement 122 exposed to cross horizontally, the precast slab 110 is integrated with each other by the precast continuation slab 120 through finishing grouting. will do

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: Precast slab bridge using continuous slab
110: precast slab
111: continuous reinforcing bar 112: upper end surface
113: lower end surface 114: shear reinforcement
115: continuous point reinforcing bar 116: formwork for separation
117: form receiving groove
120: continuous slab 121: shear groove
122: shear groove reinforcement
130: bridge substructure
131: pier 132: abutment
133: bridge bearing
A: Continuous point S: Blockout

Claims (10)

In the precast slab bridge 100 using a continuous slab in which the bridge is constructed by mounting the precast slab 110 to be spaced apart from each other using the bridge bearing 133 without installing a girder,
Precast slabs 110 installed to face each other and spaced apart from each other in the longitudinal direction at the continuous point portion (A) of the bridge substructure 130; and
In a state where the lower portions of the precast slab 110 are spaced apart from each other, the upper portions of the precast slabs 110 are continuous slabs 120 formed to be continuous with each other; including,
Without installing an expansion joint device at the continuous point part (A), the longitudinal expansion and contraction of the precast slab is absorbed by the expansion joint installed at the beginning and end points of the continuous bridge,
The precast slab 110 is a reinforced concrete horizontal plate member having an end surface formed therein, and includes an upper end surface 112 formed by a block-out portion (S) formed by blocking out from the upper end surface downward; and a lower end surface 113 formed as an end surface of the precast slab 110 as a lower portion of the block-out portion (S);
The precast slab 110 can accommodate the shear reinforcement 114 formed on the upper surface of the upper end surface in the block-out portion S between the upper end surfaces 112 of the precast slab 110 facing each other. The precast continuation slab 120 having the shear groove 121 formed therein is inserted and installed so as to be integrated, so that the upper end surface 112 and the lower end surface 113 are spaced apart from each other by the precast slab 110 spaced apart from each other. to be set, but the lower part is not continuous with each other, and the block-out part (S) formed on the upper part is made to be continuous with each other by the precast continuation slab 120,
The shear groove 121 is formed to penetrate the precast continuation slab 120, and thus, the shear reinforcement 114 in the shear groove reinforcement 122 exposed to horizontally cross the inside of the shear groove 121 is mutually Precast slab bridge using a continuous slab so that the precast continuous slab 120 and the precast slab 110 are integrated with each other through finishing grouting after setting to cross. delete delete delete delete delete In the construction method of the precast slab bridge 100 using a continuous slab to construct the bridge by mounting the precast slab 110 to be spaced apart from each other using the bridge bearing 133 without installing a girder,
(a) as the bridge substructure 130, the piers 131 are spaced apart from each other in the longitudinal direction between the two abutments 132 to form a continuous point portion (A);
(b) allowing the precast slabs 110 to be mounted at a distance from each other at the continuous point portion (A); and
(c) installing the continuation slab 120 to be inserted into the block-out part (S) of the precast slab 110 facing each other;
The precast slab 110 is installed to face each other by being spaced apart from each other in the longitudinal direction at the continuous point portion A of the bridge lower structure 130 , and the continuous slab 120 is the lower part of the precast slab 110 . are spaced apart from each other, and the upper parts are formed to be continuous with each other, so that the longitudinal expansion and contraction of the precast slab 110 is installed so as to be spaced apart from each other without installing an expansion joint device at the continuous point part (A). to be absorbed by the lower part of the slab 110,
The precast slab 110 of step (c) is a reinforced concrete horizontal plate member having an end surface formed therein, and an upper end surface 112 formed by a block-out portion (S) formed by blocking out from the upper end surface downward; and a lower end surface 113 formed as an end surface of the precast slab 110 as a lower portion of the block-out portion (S);
The precast slab 110 can accommodate the shear reinforcement 114 formed on the upper surface of the upper end surface in the block-out portion S between the upper end surfaces 112 of the precast slab 110 facing each other. The precast continuation slab 120 having the shear groove 121 formed therein is inserted and installed so as to be integrated, so that the upper end surface 112 and the lower end surface 113 are spaced apart from each other by the precast slab 110 spaced apart from each other. to be set, but the lower part is not continuous with each other, and the block-out part (S) formed on the upper part is made to be continuous with each other by the precast continuation slab 120,
The shear groove 121 is formed to penetrate the precast continuation slab 120, and thus, the shear reinforcement 114 in the shear groove reinforcement 122 exposed to horizontally cross the inside of the shear groove 121 is mutually A precast slab bridge construction method using a continuous slab in which the precast continuous slab 120 and the precast slab 110 are integrated with each other through finishing grouting after setting to cross. delete delete delete

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