KR101104298B1 - Through bridge construction method by side beam and slab by box structure without lateral prestressing - Google Patents

Abstract

PURPOSE: A construction method of a through bridge formed by integrating a side beam and a slab without horizontal strain is provided to reduce construction time by integrating side a slab with side beams through filling concrete. CONSTITUTION: A construction method of a through bridge formed by integrating a side beam and a slab without horizontal strain is as follows. Bridge lower structures(200) having abutments and piers(210) are installed in a longitudinal direction. Beams are connected between the top surfaces of the bridge lower structures using a lifting device. Each beam comprises a hollow box-shaped body(111) and a lower support(112). Side beams(110) are installed in both sides of the top surface of the bridge lower structures. Slabs(120) are formed between the top surface of the bridge lower structures and are integrated with the side beams.

Description

THROUGH BRIDGE CONSTRUCTION METHOD BY SIDE BEAM AND SLAB BY BOX STRUCTURE WITHOUT LATERAL PRESTRESSING}

The present invention relates to a construction method of a bridge construction that is constructed by integrating the side beam and the slab made of a hollow box body without transverse tension. More specifically, it relates to the construction method of the bridge construction in which the slab is located at the lower side of both side beams, so that the construction of the bridge construction can be carried out without using the provisional system, but without using the transverse tension material for integrating the slab and the side beams. It relates to a construction method of a bridge construction that is constructed by integrating the side beam and the slab made of a hollow box body without lateral tension that can greatly extend the width in the lateral direction.

THROUGH BRIDGE is a bridge type depending on the position of the slab.

In other words, the bridge is a bridge in which the slab (surface) is positioned below the longitudinal girder.

The bridge that has been recently applied in this way is the UCB (U-TYPE CHANNEL BRIDGE, channel bridge) that has been used for light rail construction.

Figure 1a is a cross-sectional view of the construction cross-section of the channel bridge (10, UCB) and the PSC girder bridge (20), which is lower than the PSC girder bridge is advantageous for securing visibility during driving, by reducing the earthwork volume of the slab connection section There is an advantage that the workability and construction cost can be reduced.

As a conventional construction method of such a channel bridge, a U-segment for channel bridge can be installed by a full-stage method. In this case, a temporary facility such as a copper bar must be installed. Often accounted for too much.

Thus, as shown in FIG. 1B, a method of constructing the U-shaped segment 10 using the launching system 30 in the bridge traveling direction is introduced.

However, such a launching system has a problem in the expensive launching system 30 because the U-shaped segment 10 for the channel bridge is manufactured and operated by repeatedly connecting the bridges in the longitudinal direction by lifting the bridges and the upper portions of the shifts. In case of occurrence, there was a problem that construction could be stopped because other construction could not proceed.

Figure 1c shows another conventional Haro bridge construction method, first to install the U-shaped temporary frame 60 between the bridge substructure 50, such as a bridge, U-shaped free to be mounted on the U-shaped temporary frame 60 After installing the cast segment 70, a method of press-bonding the precast segments 70 to each other by a tension member 72 arranged in the longitudinal direction as shown in FIG. 1D is introduced.

At this time, the U-shaped precast segment 70 is to use the pre-stress is introduced in advance by the tension member 73 in the transverse direction to the slab 71 as shown in Figure 1e, which is the rigidity according to the width of the slab 71 It is intended to enhance, and it can be seen that there is no correlation unlike the construction of the U-shaped precast segment 70.

However, such a method of construction of the bridge construction requires the effort and cost for installing the temporary facilities, such as the installation of the L-shaped temporary frame 60. Therefore, there is a need for a more simple and structurally stable construction of the construction bridge construction method for the construction of the bridge construction. It became.

FIG. 1E illustrates another conventional method of manufacturing a bridge, in particular, a preflex beam 40 is fabricated, and a protrusion 42 is formed horizontally protruding from the lower inner surface of each lower flange concrete 41, and the protrusion is formed. (42) is installed so that the precast concrete slab 50 is mounted,

The precast concrete slab 50 and the preflex beam 40 are connected to each other by the protruding reinforcement (43,44), and finish the portion where the protruding reinforcement (43,44) is connected with concrete 45 How to make Haro Bridge is introduced.

This bridge construction is different from the conventional method of manufacturing a precast U-shaped segment 10 connected to each other in the longitudinal direction, but when the self-weight and live load of the slab acts on the protrusions 42, they are structurally weak. There was no.

In addition, the haro bridge according to FIG. 1E uses a preflex beam 40 and a slab 50, and adopts a method of introducing a prestress to the slab 50 by a transverse tension member in order to sufficiently secure the transverse width. It can be seen that.

However, this method is inferior in workability and workability, such as the need to install a temporary device due to the lack of a work space for tensioning and fixing the transverse tension material on both outer surfaces of the preflex beam 40, using a preflex beam As a result, the construction cost was inevitably increased, and because the weight of the slab 50 was large, there was also a shortage of sufficient width to secure the transverse width.

Accordingly, the present invention enables to effectively integrate both side beams and slabs constituting the halo bridge with each other, while not having a large weight in the construction of the haro bridge, and in particular, so as not to integrate the both side beams and the slab in the transverse direction by the transverse tension member. Provision of the construction method of the Haro bridge can be made a technical problem to be solved.

The present invention

Alternating, longitudinally installing bridge substructures including piers;

Hollow rectangular box-shaped body portion and a beam including a lower support formed integrally protruding on the lower inner surface of the body portion by using a lifting device in the longitudinal direction between the upper surface of the bridge substructure by one longitudinal connection Installing both side beams so as to be spaced apart in the transverse direction; And

Including a slab in the transverse direction between the upper surface of the lower support of the both side beams to integrate with both side beams,

Longitudinal concrete is formed on the longitudinal connection of both side beams located at the point A of the bridge substructure with point concrete by casting, and the point concrete and the slab are longitudinal tension members. To be integrated with each other by pressing,

The slab is connected to each other in the longitudinal direction of the lightweight hollow box body extending in the lateral direction, both ends in the state that the bottom of both ends is supported by the support including the rubber pad on the upper surface of the lower support of both side beams Filling concrete is placed in the space between the side surface and the inner side of the trunk of both side beams, which is constructed by integrating the side beam and the slab made of hollow box without transverse tension to make the slab integrate with both side beams and the branch concrete. Provide construction method.

In other words, in the present invention, the slab is simply supported on both side beams in the bridge, and the slab and the side beams are integrated with each other by filling concrete. Basically, it can be seen that the slab and the side beams are connected to each other by hinged connections.

Also preferably the both side beams

A body part which is manufactured in the form of a rectangular box body in which an EPS block is embedded, and a lower part of which is formed in the longitudinal direction so that a longitudinal tension member is formed and a prestress is introduced; And a lower support having a cross-sectional height formed on the lower inner surface of the body to protrude in the form of a rectangular box and support the weight of the slab.

Side beam and slab made of hollow box body without lateral tension, so that the inner side of the upper part of the lower support is horizontally extended in the horizontal direction and bent downward while the L-shaped connecting reinforcing bar is fixed to the upper surface of the lower support. Provides the construction method of the bridge construction to be integrated.

Also preferably

The slab is

A body part which is a hollow box structure having a longitudinal hole in a longitudinal direction in which the EPS block is embedded in the longitudinal direction and a longitudinal tension member is inserted in the longitudinal direction; And a lower protrusion support part formed to support a closing plate installed between the lower protrusion support parts of adjacent slabs as a formed support part protruding from the lower outer surface of the body part. Provides a construction method of the bridge bridge that is constructed by integrating the side beam and the slab.

Also preferably

The longitudinal separation space of the adjacent slab in which the finishing plate is installed is filled with non-contraction concrete to provide a construction method by which the side beam made of a hollow box body and the slab are integrally constructed without the transverse tension so that the slab is integrated with each other in the longitudinal direction. do.

Also preferably

An end surface of the slab is horizontally extended to be bent downwards and further formed with a c-shaped connecting rebar extending and fixed to the end surface of the multi-slab slab so as to overlap each other with the L-shaped connecting bars of both side beams. Provides a method of construction of a bridgeway so that the secondary reinforcing bars penetrate the overlapping connecting bars in the longitudinal direction so that the connecting bars and the filling section longitudinal reinforcing bars are filled by the filling concrete.

These connecting reinforcing bars can be said to ensure sufficient integrity with the slab, and the longitudinal direction of the filling part by the longitudinal longitudinal reinforcing bars while effectively resisting the vertical force acting on the filling part (B) by the L-shaped connecting bars. Reinforcement becomes possible.

Also preferably

The side beam and the slab, which are made of a hollow box body without a lateral tension to allow the slab load acting on the support and the support portion to be distributed and transmitted to both side beams by further forming a support part by non-concrete concrete around the support part, are constructed. Provide the construction method of Haro Bridge.

Haro bridge according to the present invention is advantageous in quality control because both side beams and slabs are produced in advance as a precast product in the factory,

1 Even though the span is installed at the same time, two side beams are installed first, and the slabs are installed separately between the side beams, so that large heavy equipment needs to be mobilized in the transportation and construction of the factory-made side beams and slabs. It is very economical because it does not use expensive construction system or launching system.

Side beams and slabs can be transported and mounted like a conventional bridge girders even when transporting from the factory to the site, thereby increasing work efficiency. The slab is mounted on the lower flange of the side beams to provide structural stability. Construction is possible,

In addition, the conventional haro bridge had a limited width in the lateral direction, but the haro bridge according to the present invention is excellent in workability because it is manufactured so that the weight is not large, and is installed and filled so that both ends of the slab are simply supported by the side beams. Since the side beam and the slab are integrated by the concrete, the construction work of the transverse tensioning material is excluded, and thus the overall construction air can be shortened.

In addition, unlike the conventional Haro bridge, in the point portion, the point portion is formed by the point concrete by spot casting, and the slab is vertically integrated with the point concrete so that the load acting on the slab is applied to both side beams and the bridge substructure. It can be efficiently dispersed in the structure, it is possible to construct a very efficient bridge construction.

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

Figure 1a is a cross-sectional comparison of the Haro Bridge and PSC girder bridge,
Figure 1b is a construction photograph using the provisional system of the conventional channel bridge (UCB),
1C is a constructional view of a conventional U-shaped precast segment for a downhill bridge,
1D is a perspective view of a U-shaped precast segment for a downlink according to the conventional FIG. 1C,
FIG. 1E is a cross-sectional view of the fabrication of a halo bridge using a conventional preflex beam and a slab.
2a and 2b is a schematic view of the halo bridge according to the present invention,
3A, 3B, 3C, and 3D are a flowchart illustrating a construction method of the bridge bridge of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

<Configuration of Haro Bridge according to the present invention>

According to the present invention, the bridge 100 is configured to include both side beams 110 and the slab 120.

First, both side beams 110 should be manufactured as shown in FIG.

In other words, since the side beam 110 to bear most of the working load in the Haro Bridge, such a side beam cross section design is very important.

The composite beam (preflex beam as shown in Figure 1e) may be used, but because the composite beam is inexpensive because it uses expensive steel, the present invention is a side beam 110 made of prestressed reinforced concrete in the form of a hollow box Will be used.

The side beam 110 of the present invention is largely composed of a body portion 111 and the lower support (112).

First, the body portion 111 is to be embedded in the formwork during the EPS block 113 is embedded to reduce the overall weight significantly, but to be produced in the form of a rectangular box body having a height greater than the width in the horizontal direction, the length inside the lower The tension member 114 is formed in the (longitudinal) direction so that the prestress is introduced.

On the lower inner surface of the body portion 111, the lower support 112 in the horizontal direction (lateral direction) is also formed in the form of a rectangular box body.

It can be seen that the lower support 112 is formed to have a significant height (H), because the slab 120 of the present invention is installed to be supported on the upper surface of the lower support 112, the lower support 112 of the present invention. This is because it is important to make) to have a sufficient height to withstand the load of the slab.

In addition, the a-type connecting reinforcing bar 115 protruding from the inner surface of the body portion 111 is arranged in the upper space of the lower support 112 so as to be connected to the c-shaped connecting reinforcing bar 126 of the slab 120 to be described later. .

The a-type connecting reinforcement 115 is horizontally extended from the inner surface of the body portion 111 of the upper portion of the lower support 112 is bent downward so that the lower support is fixed to the upper surface of the lower support 112, which will be described below. In order to effectively resist the vertical force acting on the portion (B) can be said to form a space to enable the longitudinal reinforcement of the filling portion by the filling portion longitudinal reinforcement.

The a-type connecting reinforcement 115 is formed to be spaced apart in the longitudinal direction to be a position corresponding to the c-shaped connecting reinforcement 126 of the slab 120 to be described later.

In this case, the side beam 110 of the present invention can be seen that the weight is significantly reduced because the reinforced concrete is excluded as much as the space occupied by the EPS block 113, so that the construction can be very large in manufacturing, transportation and construction have.

In addition, the support 116, such as a synthetic rubber pad is fixed to the upper surface of the lower support 112 by an anchor bolt not shown so that both end surfaces of the slab 120 is supported.

The side beam 110 is manufactured by a precast side beam made in advance in the factory to have a predetermined cross-sectional size is carried in the field to be mounted in a way that is mounted on the bridge substructure 200.

In addition, the side beam 110 is made of a pair so that the two are arranged symmetrically with each other, the length of the pair of side beam 110 corresponding to one span (between pier and piers or between the piers and alternating) (L) Will be produced to have.

In the point portion, such as a piers, the side beams 110 are in contact with each other in the longitudinal direction of each other, but are integrated with the concrete portion 230, which will be described later. In addition, the point concrete 230 is press-connected with the slab 120 by the longitudinal tension member (128).

Next, the slab 120 is a hollow box structure whose transverse width is defined so as to be supported between the inner side surfaces of the pair of side beams 110.

The slab 120 is also manufactured in the form of a hollow box to reduce its own weight, and is a lightweight hollow box body extending in the lateral direction and is disposed to extend in the lateral direction between both side beams. After that, they are connected to each other in the longitudinal direction.

The slab 120 is largely composed of a body portion 121 and the lower protrusion support portion 122.

The body portion 121 is also to be embedded in the formwork during the EPS block 123 is embedded in the form of a rectangular box body to greatly reduce the total weight, but in the longitudinal direction of the longitudinal tension member 128 in the longitudinal direction The longitudinal hole 124 is formed so that it is inserted.

The longitudinal holes 124 are formed to be spaced apart in the transverse direction at right angles to the longitudinal direction, which is the extending direction of the body portion 121.

The lower protrusion support part 122 serves to support the closing plate 125 installed between the upper bottom protrusion support part 122 surfaces of the adjacent slab 120 as a support part protruding from the lower outer surface of the body part 121. Will be done.

In addition, protruding U-shaped connecting bars 126 are formed on both end surfaces of the slab 120 so as to be connected to the L-shaped connecting bars 115 of the side beam 110 described above.

That is, the U-shaped connecting reinforcing bars 126 are horizontally extended in the end surface of the slab 120 and are bent downward so as to extend and be fixed to the end surfaces of the multi-slab slab, so as to form the L-shaped connecting bars of both side beams ( 115 and the connecting reinforcing bars and the filling section longitudinal reinforcing bars (129) are filled with concrete 220 so as to penetrate both connecting bars (115, 126) overlapping the filling section longitudinal reinforcing bars (129) in the state to overlap with each other By landfill.

In addition, since the slab 120 of the present invention also excludes the reinforced concrete as much as the space occupied by the EPS block 123, it can be seen that the weight is significantly reduced, so that the construction can be very large in manufacturing, transportation and construction. It can be seen that the width in the lateral direction can be sufficiently secured.

The slab 120 is installed to be supported by the support 116 installed on the upper surface of the lower support constituting the side beam.

Also, as shown in FIG. 2B, the slab 120 is transported to a site and installed to be adjacent to each other in the longitudinal direction. A longitudinal tension member 128 is formed in each slab so that the adjacent slabs 120 in the longitudinal direction may be coupled to each other. It is inserted into the direction hole 124 to be fixed to the front and rear of the slab after tension.

In addition, the longitudinal space of the slab 120 adjacent to each other in the longitudinal direction as shown in Figure 2b is to be filled with non-concrete concrete 127 to the top of the finishing plate 125 so that the slab 120 is integrated with each other in the longitudinal direction. .

The slab 120 is installed to be formed on the upper surface of the lower support constituting both side beams 110 so as to configure the halo bridge 100, the top layer of the slab is formed with a coat layer to function as a conventional bridge slab. .

As a result, the haro bridge according to the present invention is constructed by connecting a plurality of U-shaped unit segments in the longitudinal direction to each other in the longitudinal direction, or by constructing a whole bridge structure over the span by mounting the entire haro bridge segment over the bridge substructure. not,

First, both side beams 110 manufactured in factories, etc. are first installed on the bridge substructure 200, and then the slab 120 is installed on the lower side of the inner side to construct the conventional inevitably used for construction of the Haro bridge or You can see that you do not need to use a launch system.

<Construction method of Haro Bridge according to the present invention>

Although there is a difference in the extension length depending on the bridge, it is most often required to construct a multi-span, so the present invention will be described based on two spans.

First, as shown in FIG. 3a, three bridges 210 are spaced apart as the bridge substructure 200.

At this time, the extension length between the bridge piers and the piers is generally referred to as one span. Since the length of the one span is predetermined, the lengths of both side beams 110 may be determined based on this.

At this time, the site where the pier 210 is installed is called the point A, and this point may be referred to as a site where a large bending moment occurs. In the present invention, the point is closed by the point concrete 230. .

When the pier construction is completed, a pair of side beams 110, which are manufactured in factories, etc., brought into the site between the pier and the longitudinal upper surface of the pier, are laterally spaced apart from each other by a lifting device such as a crane.

At this time, the bridge bearing is installed on the upper surface of the bridge in advance so that the end surfaces of both side beams 110 are supported by the bridge bearing.

Next, the slab 120 of the present invention as shown in Figure 3b so as to extend in the transverse direction between the inner surface of the upper body of the bottom support of the both side beams 110, but both end bottoms of the lower support of the both side beams 110 ( 112 is installed to be supported by the support 116 installed in.

Furthermore, the slab 120 is installed a plurality so as to be adjacent to each other in the longitudinal direction.

At this time, the L-shaped and C-shaped connecting bars 115 and 126 of both side beams 110 and the slab 120 are also overlapped with each other, and are coupled to each other by the filling part concrete 220 together with the filling part longitudinal reinforcing bars 129. Done.

At this time, the bottom portion of the slab 120 around the support 116 is formed by the support portion 117 by the non-contraction concrete so that the self-weight of the slab 120 is dispersed on the upper surface of the lower support (112).

Next, as shown in FIG. 3c, the finishing plate 125 is installed between the upper surface of the lower protrusion support 122 of the slab 120 adjacent to each other in the longitudinal direction, and the non-concrete concrete 127 is disposed on the finishing plate 125. Charged to integrate the longitudinal direction of the slab.

At this time, the longitudinal hole 124 formed in the slab 120 is in contact with each other in advance so that the longitudinal hole 124 is not blocked by using a plastic tube in the longitudinal separation space.

The longitudinal tension member 128 is inserted into the longitudinal hole 124 and both ends of the longitudinal tension member 125 are tensioned at the front and rear surfaces of the slab to be fixed after the slab 120 is pressed in the longitudinal direction. To be possible.

The slab 120 is installed so as to be adjacent to the pier 210 around, and in the space of the top of the pier to install the point concrete 230 so as to be integrated with the slab 120, the point slab 120 and the point concrete 230 may be combined with each other.

Accordingly, it can be seen that the bending parent generated at the point portion is sufficiently resisted by the slab 120 integrally formed in the longitudinal direction with the point concrete and the piers.

Next, as shown in FIG. 3d, the filling concrete 220 is poured between the inner side surfaces of the body parts of both side beams and both end surfaces of the slab 120 to be integrated.

Therefore, the haro bridge of the present invention can be seen that the slab and both side beams are integrated with each other by the filling concrete 220, the filling concrete is also integrated with the branch concrete 230, the construction of the Haro bridge with very large bending rigidity as a whole It can be seen that this is possible.

Thus, by forming a pavement layer (not shown) on the upper surface of the slab 120 it can be seen that the final bridge construction is possible.

100: Halo Bridge
110: both side beams
111: torso
112: lower support
113: EPS Block
114: longitudinal tension member
115: L-shaped connecting bar
116: support
117: support
120: slab
121: torso
122: lower protrusion support
123: EPS Block
124: longitudinal hole
125: finish plate
126: U-shaped connecting bar
127: non-contraction concrete
128: longitudinal tension material
129: longitudinal tension material
200: bridge infrastructure
210: piers
220: filled concrete
230: branch concrete

Claims (6)

Installing a bridge substructure 200 including a shift and a pier in a longitudinal direction;
A beam comprising a body part 111 in the form of a hollow rectangular box body and a lower support body 112 formed integrally protruding from the inner bottom surface of the body part by one span between the upper surfaces of the bridge substructures using a lifting device. Mounting by mounting in the longitudinal direction, but installing both side beams 110 to be spaced apart in the transverse direction; And
Including the slab 120 in the transverse direction between the upper surface of the lower support of the both side beams 110 to integrate with both side beams 110,
In the longitudinal connection portion of both side beams located in the branch portion (A) of the bridge substructure (200) to form the site-casting concrete in the horizontal direction by the point portion concrete, the point portion concrete 230 and the The slab 120 is compressed to each other by the longitudinal tension member 128 to be integrated,
The slab 120 is used to connect the light hollow hollow body extending in the longitudinal direction to each other in the longitudinal direction, the bottom of both ends is supported by the support 116 including a rubber pad on the upper surface of the lower support of both side beams Filled concrete is placed in the space between both end faces and the inner side of the trunk of both side beams so that the slab is integrated with both side beams and the branch concrete 220.
The both side beams 120 are manufactured in the form of a rectangular box body in which the EPS block 113 is embedded, and a lower portion of the trunk portion 111 is formed so that the longitudinal tension member 114 is formed in the longitudinal direction to introduce the prestress. ); And a lower support 112 protruding in the form of a rectangular box on the lower inner surface of the body portion 111 and having a cross-sectional height capable of supporting the weight of the slab. The inner side of the body portion 111 is horizontally extended in the horizontal direction and bent downward so that the lower end is fixed to the upper surface of the lower support body is formed so that the connection bar 115 is formed,
An end surface of the slab 120 is horizontally extended in the horizontal direction and bent downward while the c-shaped connecting rebar 116 is further extended and fixed to the end surface of the multi-slab slab is formed a-shaped connecting bars (115) of both side beams ) So that the connecting rods and the filling section longitudinal reinforcing bars 127 are filled with concrete 220 by penetrating both connecting bars 115 and 126 overlapped with the filling section longitudinal reinforcing bars 127. The construction method of the aarrow bridge, which is constructed by integrating the side beam and the slab made of a hollow box body without lateral tension, characterized in that it is buried by. delete The method of claim 1,
The slab 120 is
A body portion 121 which is a hollow box structure in which the EPS block 123 is embedded in the longitudinal direction and the longitudinal hole 124 is formed in the longitudinal direction in the longitudinal direction so that the longitudinal tension member 114 is inserted in the longitudinal direction; And a lower protrusion support part 122 formed to support a closing plate 125 installed between upper and lower protrusion support parts 122 of the adjacent slab 120 as a support part protruding from the lower outer surface of the body part 121. Haro bridge construction method is constructed by integrating the side beam and the slab made of a hollow box body without lateral tension, characterized in that to be used to include. The method of claim 3,
Hollow box without transverse tension, characterized in that the non-concrete concrete 127 is filled in the longitudinal separation space of the adjacent slab 120 is installed with the closing plate 125 so that the slab 120 is integrated with each other in the longitudinal direction. The construction method of Haro Bridge which is constructed by integrating the side beam and the slab made of a sieve. delete The method of claim 1,
The support 117 is formed by the non-concrete concrete around the support 116, so that the slab load acting on the support and the support is distributed to both side beams. The construction method of the bridge is constructed by integrating the side beam and the slab.

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