KR20110109367A - Ease precast girder and bridge using the same - Google Patents

Abstract

The present invention combines the advantages of existing beam bridges and steel bridges, such as PSC beams and preplexes, and can be applied regardless of new or temporary construction or replacement, excellent load capacity, long span is possible, sag, noise and vibration It is small and can be easily transported and mounted by crane, and it can be rapidly installed, so it is possible to replace new and old bridges including road and railway bridges, and to quickly recover in the event of a disaster. By adopting a structure that synthesizes concrete in steel materials, it is possible to reduce temporary materials and to produce any shape as you want, and it is easy to connect members to precast that can be applied to bridge girder and building girder which is suitable for various site conditions. It is to provide a girder and a bridge structure using the same.
To this end, the present invention comprises a steel girder consisting of the upper and lower flanges formed on the left and right sides of the abdomen, and the upper and lower flanges formed on the upper and lower abdomen; A concrete part placed and cured in the inner space of the steel girder; It provides a precast girder and a bridge structure using the same; characterized in that it comprises a; upper longitudinal reinforcement formed in the longitudinal direction to increase the rigidity by increasing the cross-section secondary moment on the upper flange.

Description

Precast girder and bridge structure using the same

The present invention relates to a precast girder, and a bridge structure using the same, and more specifically, a bridge bridge, an access bridge, a berth and a large building, a prefabricated beam, a bridge including a bridge, and a permanent bridge. The present invention relates to precast girders applicable to new bridges and old bridges in the field of railway bridges, and bridge structures using the same.

In general, bridges consist of substructures such as shifts and piers, and superstructures such as girders that rise above them.

Representative girder bridges include pre-stressed concrete (PSC) beam bridges and preflex beam bridges, which have the following disadvantages.

First, PSC beams and preflex beam bridges are relatively complex in design and construction, difficult to repair in the event of cracks in concrete, retension of steel wires, and especially limited in linear applicability. Do.

In particular, the preflex beam bridge has a low height and a long span, which is advantageous for securing a space under the bridge, but has a disadvantage of severe deflection and vibration.

In addition, the PSC beam bridge has a high height compared to the width at the time of construction, and there is a risk of falling in the construction process, and the construction of a long span makes it difficult to increase the height and weight. Has the disadvantages.

In addition, when the PSC beam is applied to the road bridge, there is a problem that cross-sectional damage occurs when the vehicle collides with the girder, and when applied in a severe longitudinal inclination, it is pushed to the lower side by weight and horizontal force. It has the disadvantage of increasing resistance.

Conventional beam bridges mainly use PSC beam series which introduces prestress to RC structure and preflex which introduces prestress to the tension of steel girder.It has the disadvantage of making girder only in straight line to introduce tension force. Has the disadvantage of placing in a straight line and making the bottom plate curved.

Next, another girder bridge is a steel bridge made of steel only, the steel bridge has a problem that the deflection and vibration is severely generated, the local buckling of the impacted portion occurs during the collision, thereby reducing the load capacity have.

In particular, when the steel bridge uses high-strength steel other than general steel, the steel thickness can be thinned, but the cross-section secondary moment becomes smaller, causing sag and vibrations to be severe.

On the other hand, more than 50% of steel bridges currently in use in Korea are made up of bridges that have been in service for more than 50 years.In this way, fatigue and corrosion are reported due to major deterioration damages that affect the durability of old steel bridges. have.

The upper types currently applied to retrofitting old railway bridges include slab bridges, H-beam reclaimed slab bridges, steel reinforced bridges using steel reinforced concrete (SRC) bridges, and general composite plate girders. The application area is short within 10 meters, the fixed load is large, and the dynamic performance is excellent, but the lower self-reinforcement is necessary due to the increase of the upper weight, the slab curing period is required, the crane work is impossible, and the rebar is excessively required. There is this.

The H-beam buried slab bridge has excellent load capacity, large fixed load, and excellent dynamic performance, but it needs lower reinforcement due to the increase of upper weight, slab curing period and beam manufacturing period, and the beam and concrete joint due to lack of construction capacity. There is a possibility that the quality of the inhabit slab construction surface is deteriorated, and when the reinforcement is reinforced, the H-beam must be drilled, and the gap between the H-beam and the H-beam is narrow, which makes it difficult to work.

 SRC (Steel Reinforced Concrete) Haro Bridge is a concrete bridge inside the crossbeam and the mold of the Haro Bridge.It is low in shape, weak in load capacity, small in fixed load, and the lower reinforcement is smaller than the H-filled landfill bridge and slab bridge. Curing period and beam fabrication period are required, and the amount of steel beams such as cross beams is small, the rigidity is small, the vibration and deflection is large, and the thickness of the bottom plate is structurally unstable and the reinforcement is difficult.

Steel composite bridges using general steel composite plate girders are characterized by small fixed loads, increased torsional stiffness, bottom plate curing periods, and slightly higher mold heights.

On the other hand, the existing railway bridges have been constructed for a long time, a lot of bridges suffered from disasters, such as floods, the maintenance is inevitable, but due to the following characteristics of the railway bridges, maintenance is accompanied by difficulties in various aspects as will be described later.

Unlike road bridges, railway bridges are difficult to block or detour because of the trains operating. For example, in the case of the high-speed railway operation section, it is not possible to lengthen the slow running time during construction, and the rapid construction must be performed within this time as the operation blocking time is 3 to 4 hours.

In addition, the railway bridge has a large weight and a large amount of transportation due to the characteristics of the vehicle to be passed through it, so make sure to ensure safety during construction.

Existing railway bridges are designed according to the past design standards, and do not satisfy the current strengthened design standards, and many of them were constructed as non-plated plate-shaped bridges, and have much sag, vibration, and noise. Due to the risk of disaster, pier has gravity, pier and well foundation, direct foundation and wooden foundation, and in case of shift, there are many masonry. In addition, the bearing capacity of the foundation is small and the seismic resistance is very weak.

In other words, the existing railway bridges are designed according to the past design standards, and do not satisfy the current design standards that have been strengthened. Therefore, it is necessary to be constructed so that rapid construction is possible and the construction cost is low while satisfying the current design criteria by an appropriate method for improving an old bridge.

As mentioned above, the existing PSC beam and the bridges using the existing beam series and slab bridges or steel materials are difficult to be applied to both road bridges and railway bridges, and to be difficult to make long spans. It is difficult to do, there is a limitation in the linear applicability, it is extremely difficult to apply the bridge of the type changed to various site conditions, and steel bridges have problems such as severe sag and vibration.

The present invention is to solve the above problems, combining the advantages of the PSC beam and the existing beam-based beam bridge and steel bridge, and can be applied regardless of new or temporary construction or replacement, composite structure of steel and concrete As the load capacity is excellent, long span is possible, and sag, noise and vibration are small, and it is easy to transport and mount the crane by the factory production, and rapid construction is possible, so that new bridges including road bridges and railway bridges and old bridges are replaced and disasters occur. It is possible to quickly recover, significantly shorten the construction period and significantly reduce the construction cost compared to the existing construction method, and can be applied to various bridge types to provide a precast girder with excellent applicability according to site conditions, and a bridge structure using the same. There is a purpose.

In addition, an object of the present invention is to provide a precast girder that can be transformed into a girder such as an access bridge, a mooring berth, and a girder of a building, which is a large construction structure. .

In order to achieve the above object, the present invention, the left and right sides of the abdominal plate and the upper and lower flanges formed on the upper and lower abdominal plate formed of a steel girder to form a formulation or a square as a whole;

A concrete part placed and cured in the inner space of the steel girder;

And a longitudinal reinforcing member formed in a longitudinal direction on the upper flange upper surface to increase stiffness through the increase of the cross-section secondary moment is provided.

On the other hand, according to the first form of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides, the upper and lower flanges are formed in the overall formulation or quadrangle, and the upper portion Upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the upper surface of the flange, transverse reinforcing bars that penetrate through the upper longitudinal reinforcement, and placing and curing in the inner space of the steel girder A first precast girder segment comprising a concrete part to be segmented and manufactured;

 And a second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment. Bridge structures are provided.

On the other hand, according to the second form of the bridge structure to which the precast girder according to the present invention is applied, the steel girder formed of the upper or lower flanges formed on the upper and lower sides of the left and right sides, the upper and lower flanges formed as a whole or a quadrangle, and the upper portion Upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the upper surface of the flange, transverse reinforcing bars that penetrate through the upper longitudinal reinforcement, and placing and curing in the inner space of the steel girder A first precast girder segment comprising a concrete part to be segmented and manufactured;

 A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;

Outconcrete parts placed and cured in the outer space of the steel girder so as to surround the transverse reinforcing bars that are reinforced with the upper longitudinal reinforcement of each precast girder segment to connect the first precast girder segment and the second precast girder segment to each other. There is provided a bridge structure using a precast girder, characterized in that configured to include.

On the other hand, according to the third form of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides and the upper and lower flanges formed on the upper and lower sides of the abdominal plate to form the overall formulation or quadrangle, and the upper portion The first precast girder, which is composed of an upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the flange and a concrete part that is cast and cured in the inner space of the steel girder. Segments;

 A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;

A bridge structure using a precast girder is provided, comprising: a cross beam installed to connect the abdominal plates of the first precast girder segment and the second precast girder segment to each other.

On the other hand, according to the fourth form of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides and the upper and lower flanges formed on the upper and lower sides of the abdominal plate to form the overall formulation or quadrangle, and the upper portion The first precast girder, which is composed of an upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the flange and a concrete part that is cast and cured in the inner space of the steel girder. Segments;

 A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;

A cross beam installed to connect the first precast girder segment and the second precast girder segment to each other;

An arch rib erected along a longitudinal direction of the girder on an upper flange of the first precast girder segment and the second precast girder segment;

A bridge structure using a precast girder is provided, including; and a cable and a beam connected between the arch rib and the upper flange of the girder segment.

On the other hand, according to the fifth aspect of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides and the upper and lower flanges formed on the upper and lower sides of the abdominal plate to form the overall formulation or quadrangle, and the upper portion Upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the upper surface of the flange, transverse reinforcement which is reinforced through the longitudinal reinforcement, and concrete cast and cured in the inner space of the steel girder A first precast girder segment configured to segment and fabricate;

 A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;

A cross beam installed at regular intervals along the longitudinal direction of the girder to connect the first precast girder segment and the second precast girder segment to each other;

Provided is a bridge structure using a precast girder, comprising: a truss member erected in a truss structure along the longitudinal direction of the girder on the upper flange of the first precast girder segment and the second precast girder segment. .

On the other hand, according to the sixth form of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides and the upper and lower flanges formed on the upper and lower sides of the abdominal plate to form the overall formulation or quadrangle, and the upper portion The first precast girder, which is composed of an upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the flange and a concrete part that is cast and cured in the inner space of the steel girder. Segments;

 A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;

And a cross beam installed to connect the first precast girder segment and the second precast girder segment to each other.

The crossbeam is divided into left and right crossbeams coupled to the first precast girder segment and the second precast girder segment, and a central crossbeam connecting therebetween, and adjusting the connection height of the left and right crossbeams and the center crossbeam. There is provided a bridge structure using a precast girder, characterized in that the joint plate for the installation.

On the other hand, according to the seventh aspect of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides and the upper and lower flanges formed on the upper and lower sides of the abdominal plate to form the overall formulation or quadrangle, and the upper portion The first precast girder, which is composed of an upper longitudinal reinforcement formed in the longitudinal direction to increase rigidity by increasing the cross-section secondary moment on the flange and a concrete part that is cast and cured in the inner space of the steel girder. Segments;

 A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;

And a cross beam installed to connect the first precast girder segment and the second precast girder segment to each other.

A bridge structure using a precast girder is provided at a connection portion of the cross beam and the first precast girder segment and the second precast girder segment to install a joint plate for adjusting the height of the connection between the cross beam and each segment.

On the other hand, according to the eighth aspect of the bridge structure to which the precast girder according to the present invention is applied, the steel girder is composed of the upper and lower flanges formed on the upper and lower sides of the left and right sides and the upper and lower flanges formed on the upper and lower sides of the abdominal plate to form the overall formulation or quadrangle, and the upper portion Longitudinal reinforcement formed in the longitudinal direction to increase the rigidity by increasing the cross-section secondary moment on the upper surface of the flange, the transverse reinforcement is passed through the longitudinal reinforcement, and the concrete portion placed and cured in the inner space of the steel girder A precast girder segment comprising and segmented;

An outconcrete portion which is poured and cured in an outer space of the steel girder to surround the transverse reinforcement which is passed through the longitudinal reinforcement of the precast girder segment;

A bridge structure using a precast girder is provided, including a H beam in which the precast girder segment is pre-installed in a lower structure, and a composite shift formed by reinforcing reinforcing bars in the H beam and placing concrete. .

On the other hand, the steel girder of the precaster girder segment of each of the embodiments described above is characterized in that it is formed in a curved shape when applying a curved bridge.

The effects of the present invention are as follows.

The precast girder of the present invention combines the advantages of existing beam bridges and steel bridges, such as PSC beams and preplexes, and is applicable to road bridges and railway bridges, whether new or temporary construction or replacement, composite steel and concrete Its structure is excellent in load capacity, making it possible to make long spans, and to reduce sag, noise and vibration.It is possible to apply the best bridge type that best fits the application site by freely combining girder according to site conditions. It also has the advantage of excellent linear applicability by reflecting the vertical and planar curves.

In addition, the precast girder of the present invention is easy to transport and crane mounting and rapid construction by the factory production, it is possible to replace the new bridges and old bridges including road bridges and railway bridges, and to quickly recover in the event of a disaster, the existing construction work Compared with the construction method, the construction period is greatly shortened and construction cost is greatly reduced, and it can be applied to various bridge types.

In addition, the bridge structure to which the precast girder of the present invention is applied also can be applied to road bridges and railway bridges, regardless of new or temporary construction or replacement of old bridges. It has the effect of reducing sag, noise and vibration, and it is easy to transport and mount cranes and enables rapid construction, so that new bridges including road bridges and railway bridges and replacement of old bridges and old bridges can be quickly restored in case of disasters. Compared with the existing construction method, the construction period can be greatly shortened and construction cost can be greatly reduced.

Precast girder of the present invention is a structure that can be applied to the berth (Access Bridge), the mooring (Berth), such as the berthing structure of the port facilities, the precast concrete girder is installed on the pile after pile pier on the shore when the existing port structure construction The precast girders used in the existing method are shorter as concrete girders and have the disadvantage of having to separately cast concrete for joining with piles, but the precast girders of the present invention are composed of steel and concrete. It is possible to reduce the construction cost of the pile by widening the installation interval of the pile by making it possible to lengthen the span, and it is easy to join the pile because it is made of steel outside.

In addition, the existing concrete precast girder has a disadvantage that it takes a long time and costly to do the second cast in the field after the first production in the factory and the third cast in the site, but the precast girder of the invention is in the factory As it can be completed, the air is shortened and construction costs are also reduced.

On the other hand, the precast girders of the present invention can be used as a girder to connect to the pillar portion during the construction of large building structures, and has a good load-bearing strength with the composite structure of steel and concrete, easy to connect according to the use of steel and long diameter Can be simplified.

1 is a cross-sectional view showing a precast girder of the present invention
Figure 2 is a cross-sectional view of the girder bridge configuration of the first form of the bridge structure to which the precaster girder of the present invention is applied
Figure 3 is a side view showing an example of the structural expansion of the girder bridge, the first form of the bridge structure to which the precaster girder of the present invention is applied,
Figure 4 is a side view showing a structural expansion example of the girder bridge, which is the first form of the bridge structure to which the precaster girder of the present invention is applied, showing a truss reinforced girder bridge
5 and 6 are cross-sectional views showing respective embodiments of the slab bridge which is the second form of the bridge structure to which the precaster girder of the present invention is applied;
5 is a view showing a case where concrete is installed on the side of the abdominal plate
Figure 6 is a view showing a case where the concrete is removed from the side of the abdominal plate
Figure 7 is a cross-sectional view showing a third bridge of the bridge structure to which the precast girder of the present invention is applied
FIG. 8 is a view showing a modified example of the Haro bridge, which is the third form of the bridge structure to which the precaster girder of the present invention is applied.
9 is a cross-sectional view taken along the line of FIG. 8.
FIG. 10 is a view showing a modified example of the Haro bridge, which is the third form of the bridge structure to which the precaster girder of the present invention is applied, showing an induction fire railway bridge having a pipeline.
11 is a cross-sectional view showing the arch reinforcement halo bridge of the fourth form of the bridge structure to which the caster girder of the present invention is applied;
12 is a side view of the arch reinforcement haro bridge of FIG.
Figure 13 is a cross-sectional view showing the arch reinforcement halo bridge of the fifth form of the bridge structure to which the caster girder of the present invention is applied
14 is a side view of the truss reinforcing halo bridge of FIG.
15 and 16 illustrate the girder bridges for temporary construction which are the sixth and seventh forms of the bridge structure to which the precaster girder of the present invention is applied.
15 is a cross-sectional view showing an example of the first structure when the railway bridge is applied;
16 is a sectional view showing a second structural example when applying a railway bridge;
FIG. 17A is an enlarged view of part “A” of FIG. 16, and (B) is a front view showing a height adjusting joint plate applied to (A).
FIG. 18A is an enlarged view showing another modified example of part “A” of FIG. 16, and (B) is a front view of the height adjusting joint plate applied to (A).
Fig. 19 is a side view showing a ramen bridge as an eighth form of the bridge structure to which the caster girder of the present invention is applied;
20 is a cross-sectional view taken along the line II-II of FIG. 19.

Hereinafter, with reference to the accompanying drawings, the specific content for the practice of the present invention will be described in detail as follows.

Example 1

A precast girder of the present invention will be described with reference to FIG.

Precast girders according to the present invention, the left and right sides of the abdominal plate 13, and the upper and lower flanges (11, 12) formed on the upper and lower portions of the abdominal plate (13) is formed as a steel (form) or quadrangular as a whole A girder 10; A concrete part 20 which is poured and cured in the inner space of the steel girder 10; The upper flange 11 is configured to include an upper longitudinal reinforcement (15 ') formed in the longitudinal direction for increasing the rigidity by increasing the cross-section secondary moment on the upper surface.

At this time, the transverse reinforcing bar 30 is passed through the upper longitudinal reinforcing material (15 '), the lower flange 12 is also provided with a lower longitudinal reinforcing material (15).

On the other hand, the upper longitudinal reinforcement (15 ') can be installed on the upper or lower surface of the upper flange (11), the transverse reinforcement (30) penetrates the upper longitudinal reinforcement (15') as necessary when reinforcement Is installed.

The precast girder of the present invention configured as described above combines the advantages of the PSC beam and the existing beam-based beam bridges and steel bridges, and is a composite structure of steel and concrete, which enables long spans, and sag, noise, and vibration. Can be reduced.

In addition, the precast girder of the present invention is easy to transport and crane mounting and rapid construction by the factory production, it is possible to replace the new bridges and old bridges including road bridges and railway bridges, and to quickly recover in the event of a disaster, the existing construction work Compared to the construction method, the construction period is drastically shortened and construction costs are also greatly reduced due to the reduction of temporary materials (eg, ridges and formwork).

In addition, the precast girders of the present invention can be manufactured not only straight, but also curved, and can be transported and assembled to the production site in the form of segment, so that the site accessibility is good, the application of the connection structure between members is easy, and the bridge type can be adapted to various site conditions. It can be applied to any bridge use, such as new or temporary construction or replacement.

That is, the precast girder of the present invention exhibits excellent load capacity, such as by filling concrete in the closed space of the steel girder 10 to prevent local buckling due to a vehicle collision, to compensate for the disadvantages of the existing steel bridge. Due to the steel material, the linearity is excellent and the long span is possible, and it is possible to change from the basic beam structure to various types of bridges.

In addition, as a feature of the precast girder of the present invention, the exposure of the beam to the outside without putting it into the concrete, although somewhat disadvantageous in terms of maintenance, there is an advantage that it can be manufactured in any shape, which is the biggest feature of steel In addition, the applicability of the connecting structure of the girder is easier than that of concrete through the external exposure of steel.

On the other hand, the precast girder of the present invention exhibits a feature that the temporary material is unnecessary because the steel plays a form role.

Example 2

Fig. 2 is a sectional view showing the construction of a girder bridge, which is a first form of a bridge structure to which the precaster girder of the present invention is applied, showing an example of a railway bridge application.

According to the girder bridge, which is the first form of the bridge structure to which the precast girder according to the present invention is applied, it is composed of the upper and lower flanges 11 and 12 formed on the upper and lower sides of the abdominal plate 13 on both the left and right sides, and the overall formulation thereof. Steel girder 10 to form a square or quadrangle, and an upper longitudinal reinforcement 15 'formed longitudinally for increasing rigidity by increasing a second cross-sectional moment on the upper surface of the upper flange 11, Segmental fabrication including transverse reinforcing bars (not shown; see FIG. 1) and concrete parts 20 that are poured and cured in the inner space of the steel girder 10 through the upper longitudinal reinforcement. A first precast girder segment 1a; A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to make a line symmetry with respect to the first precast girder segment (1a); It is configured by.

On the other hand, the upper longitudinal reinforcement (15 ') can be installed on the upper or lower surface of the upper flange (11), the transverse reinforcement (30) penetrates the upper longitudinal reinforcement (15') as necessary when reinforcement Is installed.

Since the girder bridge configured as described above can be assembled at the site by segmental fabrication, the bridge can be completed and the construction cost can be drastically reduced and construction cost can be greatly reduced by reducing the amount of work due to concrete placement at the installation site.

In addition, the girder bridge of the present embodiment can be applied to not only the railway bridge but also the road bridge as shown, the straight line as well as the curve can be produced, and because it can be assembled and transported to the production site in the form of segment, the site accessibility is improved.

Example 3

Figure 3 shows an example of the structural expansion of the girder bridge, which is the first form of the bridge structure to which the precaster girder of the present invention is applied, the girder bridge of the embodiment basically takes the girder bridge structure of the second embodiment, the arch reinforcement is made.

That is, the girder bridge of the present embodiment includes an arch portion 40 which is erected along the longitudinal direction of the girder on the upper flange 11 of the first precast girder segment 1a and the second precast girder segment 1b, A cable and a beam 41 are further provided between the arch portion 40 and the upper flange 11 of the girder segment.

Therefore, the girder bridge of the present embodiment, in addition to the advantages of the girder bridge of the above-described embodiment 2, to make the length of the long span through the reinforcement of the arch to the girders, the beauty of the bridge is also beautiful by the introduction of the arch reinforcement. It also has the advantage of reducing the deflection by reducing the impact force.

Example 4

4 is a structural extension example of the girder bridge, which is the first form of the bridge structure to which the precaster girder of the present invention is applied, the girder bridge of the embodiment basically takes the girder bridge structure of the second embodiment, but the truss reinforcement is made.

That is, in the girder bridge of the present embodiment, the truss 45 which is erected in the truss structure along the longitudinal direction of the girder on the upper flange 11 of the first precast girder segment 1a and the second precast girder segment 1b. Is further provided.

Therefore, the girder bridge of the present embodiment, in addition to the advantages of the girder bridge of the above-described embodiment 2, it is possible to make the span longer by the truss reinforcement for the girder, the introduction of the truss reinforcement is also beautiful and the bridge looks beautiful It also has the advantage of reducing the deflection by reducing the impact force.

[Example 5]

5 is a cross-sectional view showing an embodiment of a slab bridge, which is a second form of the bridge structure to which the precaster girder of the present invention is applied, showing a case where concrete is laid on the side of the abdominal plate 13.

According to the slab bridge which is the second form of the bridge structure to which the precast girder according to the present invention is applied, the abdominal plate 13 on both the left and right sides and the upper and lower flanges 11 and 12 are formed on the upper and lower parts of the abdominal plate 13. Steel girder 10, which is generally formed into a formulation or quadrangle, and an upper longitudinal reinforcement 15 'formed longitudinally for stiffness through an increase in cross-sectional secondary moment on the upper flange 11 upper surface. And, the upper longitudinal reinforcing material (15 ') and the reinforcement in the transverse reinforcement (30) and the concrete part 20 that is cast and cured in the inner space of the steel girder 10 is made of segment One precast girder segment 1a; A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to form a line symmetry with respect to the first precast girder segment (1a); Steel girder to wrap the transverse reinforcement 30 which is reinforced with the longitudinal reinforcement 15 of each precast girder segment to connect the first precast girder segment 1a and the second precast girder segment 1b to each other. It is configured to include ;; out concrete portion 50 that is poured and cured in the outer space of (10).

That is, in the slab bridge according to the present embodiment, concrete is installed on the side of the abdominal plate (13).

At this time, the PC girder 51 (Prestressed Concrete Steel Wire Strand) for providing a tension force to the concrete portion 20 in the longitudinal direction of the steel girder 10 may be disposed.

Between the first precast girder segment 1a and the second precast girder segment 1b of the outconcrete portion 50, a “∩” shaped cutout 52 is formed to reduce the material.

Longitudinal reinforcement 53 in the longitudinal direction in the inner space of the steel girder 10 may be reinforcement.

The operation of the slab bridge of this embodiment configured as described above is as follows.

The slab bridge of the present embodiment is a bridge supplementing the shortcomings of the existing H-beam buried slab bridge. The slab bridge is a bridge that supplements the shortcomings of the general R.C concrete slab bridge while having a good rigidity and a small slab thickness and having a span length of 20 m or more when the railway bridge is applied.

Conventional H-beam buried slab bridges are embedded with H-beams, and the arrangement of many H-beams is narrow and the rebar is difficult. When reinforcing bars, the reinforcement holes need to be drilled in the abdominal plate 13 of the H-beam.

In order to improve this, in the present embodiment, a slab of a T-beam type having reduced the number of beams, widening the beam spacing, and reducing the concrete of the tension part has been proposed.

In addition, the slab bridge of the present embodiment can be assembled in the field by the production of the girder segment to complete the bridge, significantly reducing the construction period by reducing the amount of work due to formwork, reinforcement, concrete placement, curing, etc. at the installation site Not only that, but also the construction cost will be greatly reduced.

In addition, the slab bridge of the present embodiment is applicable to both railway bridges and road bridges, not only straight, but also curved, and can be assembled and transported to the production site in the form of segments, so that the site accessibility is improved.

[Example 6]

FIG. 6 is another sectional view of the slab bridge, which is the second form of the bridge structure to which the precaster girder of the present invention is applied, showing the case where concrete is removed from the side of the abdominal plate 13 in the bridge form shown in FIG.

That is, the basic configuration of the slab bridge shown in FIG. 6 is the same as that of the fifth embodiment, except that concrete is not poured out of the abdominal plate 13, and the slab bridge of the fifth embodiment also has a working surface. Therefore, further detailed description will be omitted.

Example 7

FIG. 7 is a cross-sectional view showing a halo bridge as a third form of the bridge structure to which the precast girder of the present invention is applied. FIG.

According to the Haro Bridge, which is a third form of the bridge structure to which the precast girder according to the present invention is applied, the abdominal plate 13 on both the left and right sides, and the upper and lower flanges 11 and 12 formed on the upper and lower portions of the abdominal plate 13 are generally formed. A first precast girder segment (1a) comprising a steel girder (10) to form a formulation and a concrete portion (20) that is poured and cured in the inner space of the steel girder (10). )Wow;

 A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to form a line symmetry with respect to the first precast girder segment (1a);

And a cross beam 60 installed to connect the abdominal plate 13 of the first precast girder segment 1a and the second precast girder segment 1b to each other.

On the other hand, this embodiment is to illustrate the case when applied to the railway bridge as a bridge bridge type, the crossbeam 60 for the railroad bridge application to form a "" shape and the sleeper 70 for installing the rail 75 is installed therein And, between the sleeper 70 and the cross beam 60 is shown a case where the dustproof pad 71 is further provided.

The cross beam 60 is installed to be spaced apart from each other in a direction perpendicular to the girder along the longitudinal direction of the girder, and in some cases, the concrete floor plate is poured or not poured in the space between the cross beam and the horizontal beam installed to be spaced apart from each other. When the concrete bottom plate is installed in the cross beam 60, the cross beam reinforcement 72 penetrates the cross beam in the longitudinal direction of the girder.

In addition, an upper longitudinal reinforcing member (not shown) may be further provided on the upper flange 11 in the longitudinal direction to increase rigidity through the increase of the cross-sectional secondary moment.

The greatest advantage of the Haro bridge of the present invention configured as described above is that the mold height can be extremely lowered by installing the sleeper 70 in the crossbeam 60. That is, since the vehicle runs through the cross beam between the girder and the girder, the height of the cross beam is constant unless the bridge is widened. Therefore, it is very advantageous to secure the space under the bridge because it can only increase the height of the mold and keep the height of the base plate constant when the span is long and the span is not changed.

That is, the haro bridge according to the present embodiment can adjust the spacing and height of the cross beam 60 while maintaining the basic skeleton of the present invention precast girder.

In addition, the haro bridge of the present embodiment is capable of providing a bridge that is strong against earthquakes and has a high load capacity by adopting a steel framed reinforced reinforced structure (SRC).

The Haro bridge of the present embodiment is applicable to road bridges and railway bridges, it is possible to apply the disconnection and double tracks when applying the railway bridge, as a structure connecting the crossbeam 60 to the precast girder of the above-described [Example 1], railway bridge application The height of the city cross beam 60 is 300 mm, in the case of a double wire can be higher, it is possible to use H-shaped steel, U-shaped steel.

And, the sleeper 70 can be directly installed on the U-shaped crossbeam 60 to further lower the mold height, and the lower plate is a system in which load is transmitted to the housing (that is, precast girder segment) through the crossbeam 60. It is.

If you adjust the stiffness and spacing of the cross beam 60 during the long span construction, the height of the bottom plate is kept constant while increasing the rigidity of the outer housing. Increasing the stiffness of the housing, the height of the girder does not affect the securing of the space under the bridge.

In addition, when the height of the girder is high, the cross section of the bridge becomes a U-shape, which has the noise blocking effect, and the girder itself acts as both sidewalks, so that evacuation routes are installed on both sides to prevent human injury. It is an effective structure that can.

On the other hand, there is no problem because only the stiffness of the crossbeam 60 may be applied when the road bridge width is wide when the road bridge is applied.

If the girder is damaged due to the collision of the vehicle, the girder can prevent the buckling of the girder because the girder is a synthetic filling girder rather than a general steel bridge.

The haro bridge of this embodiment is also capable of producing not only a straight line but also a curved line, and having to be transported and assembled to a production site in the form of a segment, of course, good site accessibility.

[Example 8]

FIG. 8 is a view showing a modified example of the Haro bridge, which is a third form of the bridge structure to which the precaster girder of the present invention is applied, and specifically, a diagram showing an unconverted railway bridge in which a pipeline is installed, and FIG. 9 is a cross-sectional view along the line of FIG. to be.

8 and 9, the structure of the haro bridge of the present embodiment is the same as the basic structure of the haro bridge of the seventh embodiment described above.

However, in the space between the longitudinal reinforcement 15 of the first precast girder segment 1a and the second precast girder segment 1b, the communication line 73 along the girder longitudinal direction is further installed. There is.

The aro bridge of the present embodiment configured as described above can increase the rigidity by increasing the cross-sectional secondary moment of the position of the longitudinal ribs on the upper flange 11, and by installing the communication conduit 73 on the girder of the communication conduit 73. Easy to check

In addition, when planning both side walks, it is possible to maximize the installation space by utilizing as an installation space of the communication pipeline 73, it is possible to maximize the safety of the inspector by using both side walks without the need for a separate bridge sidewalk.

In addition, the haro bridge of the present embodiment, as well as a straight line, can be produced in a curved line, because it can be transported and assembled to the production site in the form of a segment, such that the site accessibility is improved, as well as have the same effect as the above-described embodiment 7.

Example 9

FIG. 10 shows a modified example of the halo bridge, which is the third form of the bridge structure to which the precaster girder of the present invention is applied.

Referring to FIG. 10, the structure of the haro bridge of the present embodiment is also the same as the basic structure and effect of the haro bridge of the seventh embodiment described above.

However, since the haro bridge according to the present embodiment is applied to the railway bridge, gravel 74 and the horizontal beam 60 and the outer concrete portion is installed in the upper portion; There is a difference in that it comprises a sleeper 70 is installed on the gravel (74).

[Example 10]

11 is a cross-sectional view showing the arch reinforcement halo bridge of the fourth form of the bridge structure to which the precaster girder of the present invention is applied, and FIG. 12 is a side schematic view of the arch reinforcement halo bridge of FIG.

11 and 12, according to the arch reinforcement haro bridge, which is the fourth form of the bridge structure to which the precast girder is applied according to the present invention, the upper and lower flanges formed on the left and right sides of the abdominal plate 13 and the abdominal plate 13 (11) (12) is formed in the longitudinal direction for increasing the rigidity by increasing the cross-sectional secondary moment on the upper surface of the steel girder (10) to form a general formulation (蹄形) or quadrangle, and the upper flange (11) A first precast girder segment (1a) comprising an upper longitudinal stiffener (15 ') and a concrete portion (20) to be cast and cured in the inner space of the steel girder (10); A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to form a line symmetry with respect to the first precast girder segment (1a); A cross beam 60 installed to connect the first precast girder segment 1a and the second precast girder segment 1b with each other; An arch rib (40) erected along the longitudinal direction of the girder on the upper flange (11) of the first precast girder segment (1a) and the second precast girder segment (1b); And a cable 41 connected between the arch rib 40 and the upper flange 11 of the girder segment.

Operational effects of the arch reinforcement haro bridge according to this embodiment configured as described above are as follows.

If it is impossible to increase the stiffness by increasing the height of the girder to increase the long span, it is possible to increase the long span by installing a tensile steel wire, but the load capacity may be reduced due to the reduction of the tensile force in the long-term use.

In order to prevent this, the present embodiment is to allow the long span to be made longer through the reinforcement of the girder, the introduction of the arch reinforcement can be beautiful and the cross-sectional force on the girder can be reduced.

Arch reinforcement haro bridge of the present embodiment, the same operation and effect as in the above-described embodiment 7, such that it is possible to produce a curved bridge in the case of not a sharp curve section, such as a ramp section, and to be transported and assembled to the production site in the form of a segment. Of course you have.

Example 11

FIG. 13 is a cross-sectional view showing a truss reinforcing halo bridge as a fifth form of the bridge structure to which the precaster girder of the present invention is applied; FIG.

Referring to FIGS. 13 and 14, on the other hand, according to the truss reinforcement haro bridge, which is the fifth form of the bridge structure to which the precast girder is applied according to the present invention, the abdominal plate 13 on both the left and right sides and the upper and lower parts of the abdominal plate 13 are formed. The upper and lower flanges (11, 12) is composed of a steel girder (10) to form a general formulation (蹄形) or quadrangular, and to increase the rigidity by increasing the cross-sectional secondary moment on the upper flange (11) A first precast girder segment 1a comprising an upper longitudinal reinforcement 15 'formed in a direction and a concrete portion 20 cast and cured in the inner space of the steel girder 10 and segmented Wow; A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to form a line symmetry with respect to the first precast girder segment (1a); A cross beam 60 installed at regular intervals along the longitudinal direction of the girder so as to connect the first precast girder segment 1a and the second precast girder segment 1b to each other; And a truss 45 which is erected in a truss structure along the longitudinal direction of the girder in the upper flange 11 of the first precast girder segment 1a and the second precast girder segment 1b.

The action of the truss reinforcement haro bridge according to this embodiment configured as described above is as follows.

If it is impossible to increase the stiffness by increasing the height of the girder for the long span, it is possible to lengthen the span by installing a tensile steel wire, but it may cause a drop in load capacity due to the reduction of the tensile force in the long term use.

In order to prevent this, the present embodiment has a long span as a method of reinforcing the truss in the girder, the introduction of the truss has the advantage that the aesthetics of the bridge is also beautiful and the cross-sectional force on the girder can be reduced.

The truss reinforcing haro bridge of the present embodiment also has the same operational effect as that of the above-described embodiment 7, such that a curved bridge can be manufactured when it is not a sharp curve section such as a ramp section, and it can be transported and assembled to the production site in the form of a segment. Of course you have.

Example 12

FIG. 15 illustrates a temporary construction girder bridge as a sixth form of the bridge structure to which the precaster girder of the present invention is applied, and according to the sixth form of the bridge structure to which the precast girder is applied according to the present invention, the abdominal plates 13 on both sides of the left and right sides. ) And upper and lower flanges 11 and 12 formed on upper and lower portions of the abdominal plate 13 to form a steel girder 10 or a cross section on an upper surface of the upper flange 11. The upper longitudinal reinforcement (15 ') is formed in the longitudinal direction for increasing the rigidity through the increase of the second moment, and comprises a concrete part 20 is cast and cured in the inner space of the steel girder (10) A first precast girder segment 1a to be manufactured; A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to form a line symmetry with respect to the first precast girder segment (1a); And a cross beam 60 installed to connect the first precast girder segment 1a and the second precast girder segment 1b to each other.

The cross beam 60 includes left and right cross beams 61 and 62 coupled to the first precast girder segment 1a and the second precast girder segment 1b, and a center cross beam connecting therebetween. It is divided into (63), the joint plate 64a for adjusting the height of the connection between the left and right crossbeams 61 and 62 and the central crossbeam 63 is installed.

The operation of the temporary construction girder bridge of the present embodiment configured as described above is as follows.

When the precast girder of the present invention is used, it is possible to transform into a girder bridge for temporary construction, and when applied as a bridge for temporary construction, it is possible to form both a Sangro bridge and a Haro bridge.

In particular, when applied to railroad bridges, the existing bottom plate and the dwarf girder have low dynamic performance, so it is essential to slow down to 40 km / h.

However, the precast girder of the present invention is excellent in dynamic performance, it is possible to operate the train normally without a slow motion as a temporary bridge.

On the other hand, in the present embodiment has been described a case where the precast girder is applied as a temporary girder as an example, it can be used without distinguishing between the permanent girder and the temporary construction girder in terms of its function. In other words, when the temporary girder is used for construction, the girder may be partially or unfilled, and when used as a permanent girder, it may be used in the form of a synthetic composite.

In addition, not only a straight line but also a curved line can be produced, and the site accessibility is good because it can be transported and assembled in the form of a segment. Therefore, it is possible to input quickly in the event of a disaster.

That is, the temporary bridge of the present embodiment is capable of adjusting the level of the rail 75 by adjusting the assembly position of the cross beam 60. That is, the level of the rail 75 can be adjusted by raising or lowering the assembly position with the girder segment of the cross beam using the height adjusting joint plate 64a of the cross beam 60.

Example 13

FIG. 16 illustrates a temporary construction girder bridge as a seventh form of the bridge structure to which the precaster girder of the present invention is applied, and according to the seventh form of the bridge structure to which the precast girder is applied according to the present invention, the abdominal plates 13 on both sides of the left and right sides. ) And upper and lower flanges 11 and 12 formed on upper and lower portions of the abdominal plate 13 to form a steel girder 10 or a cross section on an upper surface of the upper flange 11. The upper longitudinal reinforcement (15 ') is formed in the longitudinal direction for increasing the rigidity through the increase of the second moment, and comprises a concrete part 20 is cast and cured in the inner space of the steel girder (10) A first precast girder segment 1a to be manufactured; A second precast girder segment (1b) segmentally manufactured in the same configuration as the first precast girder segment (1a) and laterally connected to form a line symmetry with respect to the first precast girder segment (1a); And a cross beam 60 installed to connect the first precast girder segment 1a and the second precast girder segment 1b to each other.

In addition, a joint plate 64a for adjusting a connection height between the crossbeam 60 and each segment is provided at the connection portion of the crossbeam 60, the first precast girder segment 1a, and the second precast girder segment 1b. Is installed.

The operation of the temporary construction girder bridge of the present embodiment configured as described above is as follows.

Basically, the operation of the present embodiment is the same as that of the twelfth embodiment.

In other words, the precast girders of the present invention can be modified into temporary construction girders (crosslinking), and when the crosslinking is applied, the shape of the Sangro Bridge Haro Bridge is possible.

In addition, the precast girder of the present invention is excellent in dynamic performance, it is possible to operate the train normally without a temporary bridge, even without a temporary bridge.

In addition, the temporary bridge of the present embodiment can be manufactured not only a straight line, but also a curved line, and can be transported and assembled to a manufacturing site in the form of a segment, so that site accessibility is good. Therefore, it is possible to input quickly in case of disaster.

In addition, the temporary bridge of the present embodiment is capable of adjusting the level of the rail 75 by adjusting the assembly position of the cross beam 60. That is, the level of the rail 75 may be adjusted by raising or lowering the assembly position with the girder segment of the cross beam 60 using the height adjusting joint plate 64a of the cross beam 60.

Specifically, FIG. 17A is an enlarged view of portion “A” of FIG. 16, and (B) is a front view showing the height adjusting joint plate 64a applied to (A), and formed on the joint plate 64a. The fastening hole 640 is basically formed in a matrix form along the horizontal and vertical directions.

Thereby, the level of the rail 75 installed in the cross beam 60 can be adjusted by changing the assembly position of the cross beam 60 with respect to the joint plate 64a.

The bolt spacing in the current design standard depends on the bolt used, but is usually 65-85mm. Therefore, for example, when the M25 bolt is used, since the center interval is 75 mm, the assembly position of the cross beam 60 can be changed at a 75 mm interval.

Example 14

FIG. 18A is an enlarged view showing another modified example of the portion “A” of FIG. 16, and (B) is a front view of the height adjustment joint plate 64b applied to (A).

Referring to these drawings, the fastening holes 640 formed in the joint plate 64b of the present embodiment have the same spacing d of the fastening holes 640 on the left and right sides of the joint surface, but are formed in the height direction. Characterized in that the position is formed differently.

Therefore, unlike the thirteenth embodiment, since the bolt center spacing becomes narrower, it is possible to adjust in smaller interval units, thereby allowing more precise and free height adjustment within the bolt center spacing range.

For example, in the present embodiment, since the center interval is adjusted to 35mm when using the M25 bolt, in this embodiment it is possible to change the assembly position of the crossbeam 60 at 35mm intervals.

Example 15

FIG. 19 is a side view illustrating a ramen bridge as an eighth form of the bridge structure to which the precaster girder of the present invention is applied, and FIG. 20 is a cross-sectional view taken along the line of FIG.

19 and 20, according to the eighth aspect of the bridge structure to which the precast girder according to the present invention is applied, the upper and lower flanges 11 formed on the left and right sides of the abdominal plate 13 and the upper and lower abdomen plates 13 are formed. Steel girder (10) consisting of (12) to form a general formulation or square, and the upper longitudinal longitudinally formed to increase the rigidity by increasing the cross-sectional secondary moment on the upper flange (11) A directional reinforcement 15 ', a transverse reinforcing bar 30 that penetrates through the upper longitudinal reinforcement 15', and a concrete portion 20 to be cast and cured in the inner space of the steel girder 10; A precast girder segment comprising and segmented; An outconcrete part 50 which is placed and cured in an outer space of the steel girder 10 so as to surround the transverse reinforcement 30 which is penetrated through the lower longitudinal reinforcement 15 of the precast girder segment; It is configured to include; H-beam 80 is installed in the alternating structure of the lower structure, and the composite shift 90 made of the concrete portion 20 synthesized in the H-beam 80.

At this time, the strut 91 (strut) is installed at the connection portion between the steel girder 10 and the H beam 80 of the precaster girder segment.

On the other hand, the steel girder 10 of the precaster girder segment of each embodiment described above is formed in a curved shape when applying a curved bridge.

The operation of the ramen bridge of this embodiment configured as described above is as follows.

When applied as a composite ramen bridge, the precast girders can be used to connect to the H beam 80 installed in the alternating portion. The precast girder is made of steel to take full advantage of the ease of connection, and the concrete composite at the end is synthesized using studs 92.

The long span can be reduced, and the thickness of the steel can be reduced by adjusting the thickness of the steel when designing the resistance section against the end parent, or by reinforcing the strut 91 on the haunting portion.

In addition, the ramen bridge of the present embodiment is also possible to manufacture not only a straight line, but also a curve, and because the girder is transported and assembled to the production site in the form of a segment, the site accessibility is good.

Precast girder and the bridge to which the present invention according to the embodiments described above are summarized as follows.

First, the biggest consideration in designing a bridge is a plan for securing a passing height of a vehicle and a maximum flood level. When the precast girder of the present invention is applied, it is easy to apply design criteria because it can be changed in the form of a vertical bridge and a narrow bridge.

In addition, when applied to railway bridges, it can be applied to guided and non-phased phases, and can be applied to both straight and curved sections.

In addition, it is possible to apply long span without reinforcing PC by applying truss and arch, and it is possible to apply long span without applying PSC steel wire and preflection, and to arrange steel wire and apply preflection if necessary. It is excellent, and the curve section can be applied at this time.

On the other hand, when cross-linking is applied to the road bridge can be made long enough to install the PC steel wire 51, and by using the precast girders for downhill bridge can increase the height of the girder to be long span.

In addition, trusses and arches can be applied to road bridges applied by bridges for long spans and aesthetics, and curved bridges can also be installed.

On the other hand, when applied as a girder and permanent girders for railway bridge construction, by connecting the girder and the cross beam 60 and installing a sleeper (70) between the cross beams while manufacturing in the form of a lower, it is possible to maintain a low mold height regardless of the height of the girder In addition, by using the aforementioned joint plate (64a) (64b) to selectively adjust the height of the cross beam 60 to adjust the level of the rail (75), when used as a permanent girder composite bottom plate structure You can use

In addition, when applying a long span or a double track can be applied to the precast girder form of the present embodiment, it is possible to quickly input to the site in the event of flood damage or disaster.

In addition, the precast girder of the present invention is excellent in the performance of the girder can be applied without the difference between the permanent girder and the temporary girder, light weight, easy to construct, and can be manufactured in both curved and straight lines.

The precast girder of the present invention has excellent field applicability such as T-type slab bridge, ramen bridge, girder bridge, haro bridge, bridge, etc., according to the site conditions, road bridge, railway bridge, new bridge maintenance bridges, girder of the port structure and large buildings It can be used as girder and its basic structure is using precast girder, and it is easy to apply steel structure to the outside of girder, so it can be changed into various structures, and it is not necessary for temporary materials such as formwork when manufacturing.

The present invention combines the advantages of the beam bridge and steel bridge of the PSC beam and the existing beam series, and can be applied regardless of new or temporary construction or replacement, the long span is possible because the load capacity is excellent as a composite structure of steel and concrete It has low deflection, noise and vibration, and it is easy to transport and mount crane by the factory production, and it is possible to rapidly construct, so it is possible to replace new and old bridges including road bridges and railway bridges, and to quickly recover in the event of a disaster. Compared to this, the construction period is greatly shortened, the construction cost is greatly reduced, and it can be applied to various bridge types.

1a: first precast girder segment 1b: second precast girder segment
10: steel girder 11: upper flange
12: Lower flange 13: Abdomen
15: longitudinal reinforcement 20: concrete part
30: Rebar 40: Arch beam
41: cable 45: truss
50: out concrete part 51: PC steel wire
52: Incision area of “∩” type 53: Longitudinal rebar
60: Horizontal 61: Left beam
62: Right crossbeam 63: Center crossbeam
64a, 64b: Joint plate 640: Fasteners
70: sleeper 71: dustproof pad
72: crossbar reinforcement 73: communication line
74: Pebbles 75: Rail
80: H beam 90: Synthetic shift
91: Strut 92: Stud

Claims (24)

A steel girder formed of an abdominal plate on both left and right sides and an upper and lower flange formed on upper and lower portions of the abdominal plate to form a formulation or a quadrangle as a whole;
A concrete part placed and cured in the inner space of the steel girder;
And an upper longitudinal reinforcement formed in a longitudinal direction on the upper flange to increase stiffness through an increase in cross-section secondary moment. The method of claim 1,
The upper longitudinal reinforcement may be installed on the upper or lower surface of the upper flange, the pre-cast girder, characterized in that the transverse reinforcement is installed through the upper longitudinal reinforcement as needed when reinforcement. The upper and lower sides of the abdominal plate, and the upper and lower flanges formed on the upper and lower flanges formed on the upper and lower sides to form a formulation or quadrangle as a whole, and the upper portion formed in the longitudinal direction for increasing rigidity by increasing the cross-sectional secondary moment on the upper flange A first precast girder segment comprising a longitudinal reinforcement member, a transverse reinforcing bar which penetrates through the upper longitudinal reinforcement member, and a concrete part that is cast and cured in the inner space of the steel girder;
And a second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment. Bridge structure using. The method of claim 3, wherein
An arch portion erected along the longitudinal direction of the girder on the upper flange of the first precast girder segment and the second precast girder segment;
The bridge structure using a precast girder, characterized in that the cable or beam further connected between the arch and the upper flange of the girder segment. The method of claim 3, wherein
Bridge structure using a precast girder, characterized in that the truss is provided by reinforcing the truss along the longitudinal direction of the girder on the upper flange of the first precast girder segment and the second precast girder segment. The upper and lower sides of the abdominal plate, and the upper and lower flanges formed on the upper and lower flanges formed on the upper and lower sides to form a formulation or quadrangle as a whole, and the upper portion formed in the longitudinal direction for increasing rigidity by increasing the cross-sectional secondary moment on the upper flange A first precast girder segment comprising a longitudinal reinforcement member, a transverse reinforcing bar arranged with the upper longitudinal reinforcement member, and a concrete part cast and cured in the inner space of the steel girder;
A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;
An outconcrete part which is poured and cured in an outer space of the steel girder so as to surround the transverse reinforcement which is reinforced with the longitudinal reinforcement of each precast girder segment to connect the first precast girder segment and the second precast girder segment to each other; Bridge structure using a precast girder, characterized in that configured to include. The method according to claim 6,
Bridge structure using a precast girder, characterized in that the longitudinal direction of the steel girder can be arranged in the PC steel wire (Prestressed Concrete Steel Wire Strand) for providing a tension force on the concrete portion. The method according to claim 6,
Bridge structure using a precast girder, characterized in that the "∩" shaped cutting area is formed between the first precast girder segment and the second precast girder segment of the outconcrete portion to reduce the material. The upper and lower sides of the abdominal plate, and the upper and lower flanges formed on the upper and lower flanges formed on the upper and lower sides to form a formulation or quadrangle as a whole, and the upper portion formed in the longitudinal direction for increasing rigidity by increasing the cross-sectional secondary moment on the upper flange A first precast girder segment comprising a longitudinal reinforcement and a concrete part that is cast and cured in the inner space of the steel girder and segmented;
A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;
And a cross beam installed to connect the abdominal plates of the first precast girder segment and the second precast girder segment to each other. 2. The method of claim 9,
The cross-beams take the form of "I, H, ∪", when the "∪" shape, the bridge structure using a precast girder, characterized in that the sleeper for rail installation is installed therein. The method of claim 10,
Bridge structure using a precast girder, characterized in that the dustproof pad is further provided between the sleeper and the cross beam. The method of claim 10,
The horizontal beams are installed to be spaced apart from each other along the longitudinal direction of the girder, concrete is placed in the space between the horizontal beams and the horizontal beams are spaced apart from each other, the horizontal beams are characterized in that the horizontal beam is penetrating through the horizontal beams in the longitudinal direction of the girder Bridge structures using precast girders. The method of claim 10,
The upper longitudinal reinforcement of the first precast girder segment and the second precast girder segment is installed to the upper flange upper surface, the precast girder is installed in the space between the upper longitudinal reinforcement along the girder longitudinal direction Bridge structure using girder. The method according to claim 6,
Gravel which is installed in the cross beam and the upper concrete portion;
Bridge structure using a precast girder, characterized in that it further comprises a sleeper installed on the gravel. Species for the stiffness increases with increasing moment of inertia for bokbupan and the steel girder which the bokbupan consists of upper and lower flanges formed at upper and lower portions constitute the overall dosage form or square, the top surface of the upper flange of the left and right sides formed in the longitudinal direction A first precast girder segment comprising a directional reinforcement and a concrete part cast and cured in the inner space of the steel girder and segmented;
A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;
A cross beam installed to connect the first precast girder segment and the second precast girder segment to each other;
An arcuate beam erected along the longitudinal direction of the girder on an upper flange of the first precast girder segment and the second precast girder segment;
And a cable connected between the arcuate beam and the upper flange of the girder segment. A longitudinal girder consisting of an abdominal plate on both left and right sides, upper and lower flanges formed on the upper and lower sides of the abdominal plate to form a formulation or quadrangle as a whole, and longitudinally formed to increase rigidity by increasing the second moment in cross section on the upper flange. A first precast girder segment comprising a directional reinforcement and a concrete part cast and cured in the inner space of the steel girder and segmented;
A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;
A cross beam installed at regular intervals along the longitudinal direction of the girder to connect the first precast girder segment and the second precast girder segment to each other;
And a truss formed in the upper flange of the first precast girder segment and the second precast girder segment in a truss structure along the longitudinal direction of the girder; and a bridge structure using the precast girder. A longitudinal girder consisting of an abdominal plate on both left and right sides, upper and lower flanges formed on the upper and lower sides of the abdominal plate to form a formulation or quadrangle as a whole, and longitudinally formed to increase rigidity by increasing the second moment in cross section on the upper flange. A first precast girder segment comprising a directional reinforcement and a concrete part cast and cured in the inner space of the steel girder and segmented;
A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;
And a cross beam installed to connect the first precast girder segment and the second precast girder segment to each other.
The crossbeam is divided into left and right crossbeams coupled to the first precast girder segment and the second precast girder segment, and a central crossbeam connecting therebetween, and adjusting the connection height of the left and right crossbeams and the center crossbeam. Bridge structure using a precast girder, characterized in that the joint plate is installed for. A longitudinal girder consisting of an abdominal plate on both left and right sides, upper and lower flanges formed on the upper and lower sides of the abdominal plate to form a formulation or quadrangle as a whole, and longitudinally formed to increase rigidity by increasing the second moment in cross section on the upper flange. A first precast girder segment comprising a directional reinforcement and a concrete part cast and cured in the inner space of the steel girder and segmented;
A second precast girder segment segmentally manufactured in the same configuration as the first precast girder segment and laterally connected to form a line symmetry with respect to the first precast girder segment;
And a cross beam installed to connect the first precast girder segment and the second precast girder segment to each other.
A bridge structure using a precast girder, characterized in that the connecting plate for adjusting the height of the connection between the cross beam and the first precast girder segment and the second precast girder segment is installed. The method of claim 17 or 18,
The fastening hole formed in the joint plate is a bridge structure using a precast girder, characterized in that formed in a matrix form along the horizontal and vertical directions. The method of claim 17 or 18,
The fastening hole formed in the joint plate is a bridge structure using a precast girder, characterized in that the forming height of the left and right fastening holes are formed differently based on the joint surface. A longitudinal girder consisting of an abdominal plate on both left and right sides, upper and lower flanges formed on the upper and lower sides of the abdominal plate to form a formulation or quadrangle as a whole, and longitudinally formed to increase rigidity by increasing the second moment in cross section on the upper flange. A precast girder segment comprising a directional reinforcement, a transverse reinforcing bar penetrating through the longitudinal reinforcement, and a concrete part cast and cured in the inner space of the steel girder;
An outconcrete portion which is poured and cured in an outer space of the steel girder to surround the transverse reinforcement which is passed through the longitudinal reinforcement of the precast girder segment;
H-beam coupled to the lower portion of the precast girder segment, Bridge structure using a precast girder, characterized in that it comprises a composite shift consisting of a concrete portion synthesized in the H beam. The method of claim 21,
Bridge structure using a precast girder, characterized in that the strut (strut) is installed in the connection portion of the steel girder and the H beam of the precaster girder segment. The method of claim 21,
The abdominal plate of the steel girder bridge structure using a precast girder, characterized in that the stud for connection with the concrete of the alternating portion is provided. The method according to any one of claims 1 to 18 or any of claims 21 to 23,
The steel girder of the precaster girder segment is a bridge structure using a precast girder, characterized in that formed in a curved shape for the application of a curved bridge.

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