KR101817142B1

KR101817142B1 - U-type girder of lower route bridge for decreasing noise, and construction method for the same

Info

Publication number: KR101817142B1
Application number: KR1020150057746A
Authority: KR
Inventors: 강윤석; 고효인; 정영도; 전진택; 김동완
Original assignee: 한국철도기술연구원; 주식회사 포스코건설
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2018-01-12
Also published as: KR20160127234A

Abstract

It is possible to suppress the occurrence of cracks in the inclined web after the curing of the concrete by the corrugated structure of the corrugated steel sheet synthesized on the inclined web by using the sound absorbing plate integrated with the corrugated steel sheet in the production of the U- It is possible to effectively reduce the noise of the railway car by absorbing the noise and to prevent corrosion of the corrugated steel sheet formed of the steel material and also by using the sound absorbing plate integrated with the corrugated steel sheet as the inner formwork in the production of the U- Shaped girder for reducing noise and a method of constructing the U-shaped girder for reducing the noise can be provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a U-shaped girder for reducing noise and a method of constructing the U-

More particularly, the present invention relates to a U-shaped girder of a hanging bridge, and more particularly, to a U-shaped girder which is provided with a U-shaped girder having an inclined web to compensate for the rigidity of the inclined web during construction, U girder and a construction method thereof.

Generally, bridges can be classified in various ways, but can be classified into Sangyo Bridge, Middle Bridge, and Halo Bridge depending on the residential area and the location of the vehicle. Specifically, Sangyo Bridge means a bridge whose upper surface is above the girder or truss of the bridge, and the middle bridge means a bridge whose upper surface is near the middle of the height of the girder, and the lower bridge is located at the lower part of the girder It means a bridge.

Of these, the Lower Route Bridge is divided into Steel Reinforced Concrete (SRC) harrows, which are steel framed, concrete framed, and composite framed depending on the structural type and material composition.

In the case of domestic light rail, most of the routes pass through the city center, so construction workability, securing of luster and economical construction of the bridge superstructure are becoming important factors of the project. In addition, shortening of air, minimization of inconvenience of citizens during construction, and provision of cityscape are becoming major challenges.

In other words, in the case of a light rail structure constructed at a high price, there is a demand for a structure with a narrower and more beautiful appearance in order to reduce the urban landscape, infringe the view right, and minimize the visual rejection. In this respect, the Precast Stressed Concrete (RCC) harrow type U girder has many advantages over any other type. In the case of such a UC girder bridge, the slab thickness is as thin as 23 cm, and the slope is as high as 1.66 m in the general section between the standard papers.

Compared with a typical overhead girder bridge, such a PSC hanging bridge U-girder can be adjusted downward by about 1.7 m or more by arranging the longitudinal main component side-by-side. Therefore, it is possible to reduce the bending moment generated in the lower structure by downward adjustment of the horizontal load acting position such as the lateral load of the vehicle. In addition, such a PSC harness U type girder can avoid the steep end slope of the route, thereby increasing the operation efficiency of the railway car.

On the other hand, a general bridge type has a soundproof wall and a barrier wall on the side of the bridge to block the vehicle noise. In the case of light rail, which is an unmanned operation system, an emergency evacuation route (walkway) is installed so that passengers can be safely evacuated to nearby stations in case of emergency during operation.

The U-shaped girder of PSC Halo bridge is a main structure member web that functions as a soundproof wall and a fire wall, and the upper flange can provide a space with sufficient evacuation, so that it is unnecessary to install it by separate fire wall, It has the advantage of cost reduction.

However, in the case of such a PSC harness U type girder, the web is not only directly receiving the noise of the railway vehicle but also may cause concrete crack due to repetitive compressive stress, so that reinforcement and supplementation thereof are required .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a state in which a section steel is mounted in a composite structure lower bridge according to a conventional technique. FIG.

A composite structure lowering bridge according to the prior art comprises a pair of residential units installed between two adjacent alternating piers or bridges, a plurality of cross beams mounted between the residential units, And a slab placed in a form to surround them, and a steel section is provided in the inside of the residence.

Referring to FIG. 1, in the composite structure lowering bridge according to the related art, the mounting state of the section steel 10 is such that, when two housings are mounted on the coordinate system, the two sections 10 are spaced apart by the separation distance b ' Respectively. Since the slab is installed so as to cover both of the left and right sides of the section 10, the overall width B 'of the slab is greater than the width of the concrete piling lines L '). Each of the sections 10 at this time mainly uses an H-section steel in which the web 13 is vertically positioned between the upper flange 11 and the lower flange 12, which are usually arranged side by side.

On the other hand, as a prior art, Korean Patent No. 10-825444 discloses an invention entitled " Inclined Composite Structure Falling and Method of Construction ", which will be described with reference to FIG.

Fig. 2 is a view showing a state in which a section steel is mounted in an inclined composite structure hoistway applied to a railway according to a conventional technique. Fig.

The slant type composite structural halos according to the prior art are respectively installed so that two left and right residential houses facing each other between adjacent two alternating or piercing bridges are placed over alternating or pivotally mounted quadrangles, Further mounted. In addition, reinforcing bars are laid in the sections defined by the beams and the residential houses, and the slabs are laid between the left and right residential houses and on both sides thereof.

2, each of the left and right dwellers is provided with a section 10a in which a lower flange 12a of the section 10a is arranged inwardly of the upper flange 11a to form a web 13a, Is formed to be inclined. As a result, the distance between the left and right residential houses becomes shorter, and as a result, the length of the crossbar installed between the left and right residential houses can be reduced.

2, the section steel 10a is manufactured by using a steel plate or the like, and the upper flange 11a is narrower than the lower flange 12a and the web 13a connecting between the upper flange 11a and the lower flange 12a is narrowed Welded to be inclined. That is, since the upper flange 11a is disposed so as to protrude outward beyond the lower flange 12a, as compared with the above-described FIG. 1, the section steel 10a has the lower flange 12a, .

Compared with the above-described FIG. 1, it means that the distance b of the section steel 10a can be made as short as 2G, which means that the length of the crossbar installed between the left and right dwells can be reduced by 2G . At this time, the separation distance b may vary according to the inclination a of the web 13a.

Further, in casting the concrete, the concrete is usually laid outward by a certain thickness from the end of the upper flange 11a and the lower flange 12a, which are the ends of the section steel 10a. At this time, the concrete sparse line L may be inclined by the inclination angle a of the upper flange 11a and the lower flange 12a, or the concrete may be laid up to the concrete sparse line L '.

In the case of the inclined type composite structure lowering according to the prior art, the upper and lower sections of the lower bridge can be minimized by forming the lower portion of the section steel which constitutes the residential mortar provided on both sides, , The thickness of the bottom plate is reduced, the mold space can be secured easily, and the load and stress applied to the beam can be reduced by reducing the distance between the beams. Also, it is possible to distribute load and reduce stress with only reinforced concrete without using cross beams by reducing the distance between houses.

However, in the case of the inclined composite structure hoisting according to the prior art, the web 13a has a problem that there is no means for preventing cracking of the concrete. In addition, there is a problem that the construction cost is increased because it is made of a section steel of a residence and a side view.

3 is a view showing noise generated from a rail in a hanging U-shaped girder applied to a railway according to a conventional technique.

As shown in FIG. 3, in the conventional U-shaped girder 20 applied to a railway track, noises are generated from the rail 30 according to the operation of the railway car 40.

Railway rails are constructed by intermittently installing sleepers on gravel roads or concrete roads, and securing the rails on these sleepers using rail fixing devices such as fixing bolts and spring clips.

In such a case, the wheel of a heavy railway vehicle sequentially passes through the sleepers, causing a large amount of force to be applied to the sleeper at regular intervals, causing vibrations to propagate to the surrounding area through the sleepers and tracks, And causes various vibration related problems such as the occurrence of structure borne noise. In addition, the impact vibration generated when the wheel passes through the rail joint is transmitted to the surroundings through the above-mentioned propagation path, thereby causing vibration and noise problems. In addition, the noise generated between the rails and the sleepers, and the structural noise due to the vibration of the rails themselves cause noise pollution. Particularly, since the noise generated in the railway bridge is generated mostly by the vibration of the rail, there is a need to prevent this.

Korean Patent No. 10-825444 filed on Dec. 20, 2007, entitled "Inclined Composite Structure Falling Bridge & Korean Patent No. 10-1071642 filed on Sep. 21, 2009, entitled "Method of constructing a hanging bridge using a side beam and a slab of a psi" Korean Patent No. 10-1496356 filed on Aug. 26, 2014, entitled "Composite girder structure provided with a corrugated steel sheet web having a rectangular shape and a rectangular shape, and a method of constructing a bridge using the same" Korean Patent No. 10-1476290 filed on May 9, 2014, entitled "Steel composite PSC corrugated steel sheet U girder" Korean Patent No. 10-603906 filed on Dec. 28, 2005, entitled " Korean Patent No. 10-625304 filed on Jan. 6, 2006, entitled "U-shaped steel girder bridge construction method using a prefabricated U-shaped steel girder with a corrugated steel plate installed on the abdomen, Korean Patent No. 10-1273156 filed on Jan. 17, 2012, entitled "Composite Structure of Abdominal Corrugated Steel Sheet and Concrete of Composite Girder of Abdominal Corrugated Steel Sheet Prestressed with Covering Member"

The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a U-shaped girder which is capable of suppressing the occurrence of cracks in inclined webs by using a corrugated structure of a corrugated steel sheet synthesized on an inclined web by using a sound- A U-shaped girder which is capable of absorbing noise and which is integrated with a corrugated steel plate and capable of absorbing noise, and a method of constructing the same.

Another object of the present invention is to provide a lower U-shaped girder for reducing noise and a method of constructing the U-shaped girder, in which a sound absorbing plate integrated with a corrugated steel sheet can be utilized as an inner formwork in the production of a U-shaped girder.

According to an aspect of the present invention, there is provided a hoistway U-shaped girder for reducing noise, comprising: a lower flange having a constant width; A protective oblique web having a predetermined protection height extending from both ends of the lower flange at a predetermined inclination angle with respect to the bottom face so as to be inclined upward upward and having corrugated curved surfaces in the direction of the protection height respectively; An upper flange formed to protrude inwardly from an upper end of the protective inclined web; A corrugated steel plate having a plurality of studs, a corrugated steel plate closely attached to the inner side curved surface portion of the guarded inclined web and having an upper end extended to surround the upper flange; And a sound absorbing plate filled with a lightweight concrete, an ascon or a sound absorbing material at a predetermined height for noise reduction to be integrated with the corrugated steel sheet, and the lower flange, the warp inclined web and the upper flange are poured with concrete And a sound absorbing plate integrated with the corrugated steel plate is used as a permanent inner formwork of the protective sloping web to be connected to the web wall foam with a tie so that the sound absorbing plate integrated with the corrugated steel plate is exposed .

In this case, an opening-type railroad track for the railroad car is opened longitudinally and upwardly by the lower flange, the guard sloping web and the upper flange, and a rail on which the railroad car can be operated is installed on the railroad track do.

delete

A plurality of PS strands are installed on the end faces of the lower flange and the warp inclined web to introduce compression force into the U-shaped girder.

Wherein the corrugated steel plate is extended to the upper flange and the corrugated steel plate has a corrugated structure in which the corrugations and valleys are repeated at a predetermined pitch in the inner height section of the corrugated web, The structure may be arranged in the horizontal or vertical direction, or the horizontal and vertical directions may be arranged in the zigzag direction.

As another means for achieving the above technical object, a method of constructing a lower bridge U-shaped girder for noise reduction according to the present invention is a construction method of a lower bridge U-shaped girder having a lower flange, The method includes the steps of: a) forming a corrugated steel plate having a predetermined length, to which a plurality of sheathed connecting members are coupled; b) attaching a sound absorbing plate to the corrugated steel sheet to integrate the same; c) placing and fixing a web wall foam having a predetermined inclination on the bottom mold, and mounting a reinforcing frame on the bottom mold and the web wall foam and a sound absorbing plate integrated with the corrugated steel sheet; d) connecting a sound absorbing plate integrated with the corrugated steel plate to the reinforcing steel frame using a foam tie; e) installing a lower flange inner form on the reinforcing steel frame, placing and curing concrete between the bottom formwork, the inner flange formwork and the corrugated steel plate; And f) forming a U-shaped girder for noise reduction by demolding in the order of the lower flange inner form, the web wall form, and the floor form, wherein the sound absorbing plate integrated with the corrugated steel sheet in step b) The upper end of the corrugated steel sheet is extended so as to enclose the upper flange of the U-shaped girder in step (f), and f) in the step (c) And then the sound-absorbing plate integrated with the corrugated steel plate is exposed between the inner side surfaces of the protective inclined web, and the corrugated steel plate has a plurality of studs coupled to the inside thereof as concrete shear connectors to form the protective inclined web, Wherein the U-shaped girder is made of a synthetic resin.

Here, the reinforcing steel frame of the step c) may be manufactured such that a sheath pipe for introducing the PS strand for introducing the prestress is embedded.

According to the present invention, by using the sound absorbing plate integrated with the corrugated steel sheet in the manufacture of the hanging U-shaped girder, it is possible to suppress the occurrence of cracks in the inclined web after curing the concrete by the corrugated structure of the corrugated steel sheet synthesized on the inclined web.

According to the present invention, the sound-absorbing plate integrated with the corrugated steel plate absorbs the noise, thereby effectively reducing the noise of the railway car, and preventing corrosion of the corrugated steel sheet formed of the steel material.

According to the present invention, since the sound absorbing plate integrated with the corrugated steel sheet is used as the inner formwork in the production of the hanging U-shaped girder, it is possible to reduce the installation amount of the formwork, thereby reducing the manufacturing cost and shorten the manufacturing process of the U- .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a state in which a section steel is mounted in a composite structure lower bridge according to a conventional technique. FIG.
Fig. 2 is a view showing a state in which a section steel is mounted in an inclined composite structure hoistway applied to a railway according to a conventional technique. Fig.
3 is a view showing generation of noise from a rail in a hanging U-shaped girder applied to a railway according to a conventional technique.
4 is a perspective view of a hanging U-shaped girder for noise reduction according to an embodiment of the present invention.
5 is a front view of a hanging U-shaped girder for noise reduction according to an embodiment of the present invention.
6 is a diagram specifically showing a corrugated steel sheet applied to Fig.
Fig. 7 is a view illustrating the sound-absorbing plate applied to Fig.
8 is a flowchart illustrating a method of constructing a hanging U-shaped girder for noise reduction according to an embodiment of the present invention.
FIGS. 9A to 9F are views for explaining the method of constructing the lower bridge type U girder for noise reduction shown in FIG. 8, respectively.
10 is a view showing that a hanging U-shaped girder for noise reduction is installed on a railway bridge according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. 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 order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Harness bridge U-shaped girder for noise reduction (100)]

FIG. 4 is a perspective view of a U-shaped girder of a hanging bridge for noise reduction according to an embodiment of the present invention, FIG. 5 is a front view of a U-shaped girder of a hanging bridge for noise reduction according to an embodiment of the present invention, Fig. 5 is a diagram specifically showing a corrugated steel sheet to which the present invention is applied.

4 and 5, a lower bridge U-shaped girder 100 for noise reduction according to an embodiment of the present invention includes a lower flange 110, a warp inclined web 120, an upper flange 130, (140) and a sound absorbing plate (170). At this time, the lower flange 110, the protection oblique web 120, and the upper flange 130 are formed by pouring concrete, and the lower flange 110, the protective oblique web 120, and the upper flange 130, An opening-type railway car passage 210 is opened which is opened longitudinally and upwardly by the cargo passage.

The lower flange 110 has a constant width w as shown in Fig. 5, and the bottom surface and the upper surface are made flat. In addition, the lower flange 110 may have the same thickness t with respect to the entire section or may be formed such that the thickness of the lower flange 110 increases in the section of the bridge piercing portion.

The guard sloping web 120 performs a barrier function and an anti-sound barrier function in the passage of the railway vehicle. Specifically, the protective inclined web 120 is disposed at both ends of the lower flange 110 so as to extend upwardly and obliquely with a predetermined inclination angle? With respect to the bottom surface. In addition, the protective warp web 120 has a certain protection height h, and the corrugated surface portion 121 is formed on the inner surface in the direction of the protection height. At this time, the protection height h is formed to be smaller than the width w of the lower flange 110.

The upper flange 130 is formed to protrude inwardly from the upper end of the protective slanting web 120. At this time, the upper flange 130 may be utilized as a part of a platform. That is, the upper flange 130 can reduce the number of I-girders for platform installation in a station section, and also facilitate installation of a station during operation of the railway.

The corrugated steel plate 140 is used to prevent concrete cracking of the guard sloping web 120, as shown in Fig. Specifically, the corrugated steel plate 140 is fixed so as to be in close contact with the corrugated curved surface portion 121 on the inner surface side of the protective oblique web 120, respectively.

Preferably, the corrugated steel plate 140 is combined with the concrete of the protective inclined web 120 via the stud 150, which is a shear connection material provided on the inner surface of each of the corrugated steel plates 140, to form a composite structure. At this time, it is preferable that the corrugated steel plate 140 has a corrugated structure in which the corrugation and the corrugation are repeated at a certain pitch in the inner height section of the inclined web 120, but the present invention is not limited thereto. Further, the corrugated structure in which the crests and valleys of the corrugated steel plate 140 are repeated may be arranged in the horizontal direction or the vertical direction, and the horizontal direction and the vertical direction may be arranged in the zigzag direction.

In addition, the corrugated steel plate 140 may be extended to cover the upper flange 130. According to the corrugated steel plate 140 according to the embodiment of the present invention, it can be utilized as a permanent formwork in terms of construction, and in addition, by increasing the converted cross-section in the structural aspect, the sectional rigidity of the inclined web 120 can be increased , It is possible to prevent buckling of the inclined web 120 and to protect the concrete surface from the viewpoint of usability, thereby preventing cracking of the concrete.

The sound-absorbing plate 170 is integrated with the corrugated steel plate 140 by filling and attaching a lightweight concrete, an ascon or a sound-absorbing material to the corrugated steel plate. At this time, the sound absorbing material of the sound absorbing plate 170 may be composed of, for example, a porous sound absorbing material, a polyester sound absorbing material, a polyurethane sound absorbing material, a perforated sound absorbing material, or a perforated sound absorbing board. In addition, a protective layer (not shown) may be additionally provided to block the adsorption of the concrete on the sound-absorbing plate 170 when the concrete is laid.

Therefore, in the case of the lower bridge U-shaped girder 100 for noise reduction according to the embodiment of the present invention, the lower flange 110, the warp inclined web 120 and the upper flange 130 are formed by pouring concrete, The noise of the railway vehicle generated in the railway car passage 210 is absorbed and reduced by the sound-absorbing plate 170 integrated with the corrugated steel plate 140. [ In addition, the sound absorbing plate 170 integrated with the corrugated steel sheet can be used as an inner mold of the protective slant web 120.

5, the U-shaped girder 100 for reducing noise according to the embodiment of the present invention includes a lower flange 110 and a protective inclined web 120 for introducing a compressive force, A plurality of PS stranded wires 160 may be installed on the cross section. Specifically, the PS strand 160 is poured by curing the concrete of the hanging U-shaped girder 100, and then a tensile force is introduced to generate compressive force in the U-shaped girder 100 of the hanging bridge. At this time, the PS strand 160 may be installed on the concrete in a conventional or non-attached manner.

7 is a perspective view of the sound-absorbing plate. Fig. 7 (b) is a plan view of the sound-absorbing plate. Fig. 7 (c) is a side view of the sound-absorbing plate.

7, in the U-shaped girder 100 for noise reduction according to the embodiment of the present invention, the sound absorbing plate 170 is formed to include the rear plate 171, the sound absorbing material 172 and the front plate 173 can do.

Specifically, the back plate 171 may be formed of a galvanized steel sheet, and the sound absorbing material 172 may be a porous sound absorbing material, a polyester sound absorbing material, a polyurethane sound absorbing material, a perforated sound absorbing material, or a perforated sound absorbing board. The front plate 173 may be a bamboo-shaped aluminum front plate. Accordingly, the sound absorbing plate 170 is aesthetically bamboo-shaped and the curved shape of the front surface is advantageous for absorbing diffuse noise, and the rear plate 171 is formed of a zinc-coated steel plate, It can be easily attached to the corrugated steel plate 140.

In the case of the U-shaped girder 100 for reducing noise according to the embodiment of the present invention, by using the sound absorbing plate 170 integrated with the corrugated steel sheet during manufacture of the U-shaped girder, 140 can prevent the occurrence of cracks in the inclined web 120 after the curing of the concrete, thereby improving the strength of the concrete structure and exhibiting the compressive strength.

In addition, in the case of the U-shaped girder 100 for reducing noise according to the embodiment of the present invention, the noise absorbing plate 170 integrated with the corrugated steel sheet absorbs noise to effectively reduce the noise of the railway car 300 , Corrosion of the corrugated steel plate 140 formed of a steel material can be prevented.

In addition, in the case of the U-shaped girder 100 for reducing noise according to the embodiment of the present invention, the sound-absorbing plate 170 integrated with the corrugated steel plate 140 is used as an inner formwork when the U- The manufacturing cost can be reduced by reducing the number of steps, and the manufacturing process of the U-shaped girder 100 of the hanging bridge can be shortened.

[Method of constructing a hanging U-shaped girder (100) for noise reduction)

8 is a flowchart illustrating a method of constructing a hanging U-shaped girder for noise reduction according to an embodiment of the present invention. FIGS. 9A to 9F illustrate a method of constructing a hanging U-shaped girder for noise reduction shown in FIG. 8, FIG.

8, a method of constructing a lower bridge U-shaped girder for noise reduction according to an embodiment of the present invention includes a lower flange 110, a guard sloping web 120, and a lower bridge U- As a method of constructing the girder 100, a corrugated steel plate 140 having a predetermined length, to which a plurality of studs 150 are coupled, is formed (S110). 9A, the corrugated steel plate 140 is coupled with a plurality of studs 150, which are shear connection members. In order to install a foam tie 250 to be described later, A hole 151 is formed. As described above, the corrugated steel plate 140 has a corrugated structure in which the corrugation and the valley are repeated at a predetermined pitch in the inner height section of the corrugated web 120. At this time, the corrugation and the valley of the corrugated steel plate 140 are repeated The corrugated structure may be arranged in the transverse direction or the longitudinal direction, and the transverse direction and the longitudinal direction may be arranged in the zigzag direction. Accordingly, according to the corrugated steel plate 140 according to the embodiment of the present invention, it can be utilized as a permanent mold in terms of construction, and in the structural aspect, the cross-section is increased to increase the section rigidity of the inclined web 120 It is possible to prevent buckling of the inclined web 120 and to protect the concrete surface from the viewpoint of usability, thereby preventing cracks of the concrete.

Next, a sound absorbing plate 170 is attached to the corrugated steel plate 140 so as to be used as an inner mold of the protective slant web 120 (S120). Specifically, as shown in FIG. 9B, the corrugated steel plate 140 and the sound absorbing plate 170 are integrated by filling a lightweight concrete, an ascon or a sound absorbing material into the corrugated steel plate 140 to form a sound absorbing plate 170 . Alternatively, the sound absorbing plate 170 may be selected from a porous sound absorbing material, a polyester sound absorbing material, a polyurethane sound absorbing material, a perforated sound absorbing material, or a perforated sound absorbing board. Alternatively, the sound absorbing plate 170 may include a rear plate 171, a sound absorbing material 172, and a front plate 173 as shown in FIG. At this time, a protective film (not shown) may be additionally installed to prevent concrete from being adsorbed on the sound absorbing plate 170 when concrete is laid.

Next, the reinforcing frame 240 and the sound absorbing plate 170 integrated with the corrugated steel plate are mounted on the floor mold 220 and the web wall foam 230 (S130). Specifically, as shown in FIG. 9C, after the bottom mold 220 is installed, the web wall foam 230 is fixedly installed on the bottom mold 220 and the bottom mold 220 and the web wall foam 230 are fixed, A reinforcing mantle 240 and a sound absorbing plate 170 integrated with the corrugated steel plate are installed. At this time, the reinforcing mantle 240 is fabricated so that the sheath pipe 260 for introducing the PS strand 160 described above is introduced for the prestress introduction.

Next, the sound absorption plate 170 integrated with the corrugated steel plate is connected to the reinforcing barrel 240 using the foam tie 250 (S140). 9D, the sound absorbing plate 170 integrated with the corrugated steel plate is connected to the web wall foam 230 using a foam tie 250, for example, a tie bolt, (240).

Next, a lower flange inner formwork 270 is installed on the reinforcing mantle 240, and concrete is cured and cured (S150). 9E, a lower flange inner mold 270 is installed in the reinforcing mantle 240 and a plurality of inner molds 270 are installed between the bottom mold 220, the lower flange inner mold 270 and the corrugated steel plate 140. [ The concrete is poured and cured.

Next, the U-shaped girder 100 for noise reduction is formed by demolding the lower flange inner form 270, the web wall form 250, and the floor form 220 (S160). Specifically, as shown in FIG. 9F, when the concrete is hardened and the required strength is secured, the lower flange inner mold 270, the web wall foam 230, and the floor mold 220 are demoulded in this order, The U-shaped girder 100 for noise reduction is transported to the installation position of the railroad bridge.

Accordingly, the U-shaped girder 100 for noise reduction according to the embodiment of the present invention can be formed by the corrugated structure of the corrugated steel plate 140, after the curing and curing of the concrete, Cracks can be suppressed.

In addition, since the sound absorbing plate 170 integrated with the corrugated steel plate is used as a part of the inner mold, the number of the inner molds to be installed can be reduced, and the production cost can be reduced, thereby shortening the manufacturing process. Also, the sound absorbing plate 170 can prevent corrosion of the corrugated steel plate 140.

Meanwhile, FIG. 10 is a view showing that a hanging U-shaped girder for noise reduction is installed on a railway bridge according to an embodiment of the present invention.

10, the sound-absorbing plate 170 integrated with the corrugated steel plate may be installed on the railway car 300 and / or on the railway bridge, By absorbing the noise generated from the rail 200, it is possible to effectively reduce the noise and to suppress the cracks that may occur in the protective slant web 120.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Harness bridge type U girder for noise reduction
110: Lower flange
120: inclined web
121: Waveform curve portion
130: upper flange
140: corrugated steel plate
150: Stud
160: PS wire
170: Sound absorption plate
171: Galvanized steel plate (rear plate)
172: Sound absorbing material
173: Bending perforated plate (front plate)
200: rail
210: Corridor
220: floor mold
230: web wall foam
240: a reinforcing mantle
250: Foam Tie
260: Sheath tube
270: Lower flange inner die
300: railway vehicle

Claims

For a hanging U-shaped girder,
A lower flange 110 having a constant width;
The upper flange 110 has a predetermined curvature height h and is inclined upwards at a predetermined inclination angle with respect to the bottom face at both ends of the lower flange 110, (120);
An upper flange 130 formed to protrude inward from the upper end of the protective incline web 120;
A corrugated steel plate 140 having a plurality of studs 150 tightly fixed to an inner surface side curved surface portion 121 of the protective inclined web 120 and having an upper end extended to surround the upper flange 130, ; And
And a sound absorbing plate (170) that is filled with and attached to the corrugated steel plate (140) with a lightweight concrete, an ascon or a sound absorbing material at a predetermined height for noise reduction and is integrated with the corrugated steel plate (140)
The sound absorbing plate 170 integrated with the corrugated steel plate is formed by inserting concrete into the inner flange 110, the guard sloping web 120 and the upper flange 130, The sound absorbing plate 170 integrated with the corrugated steel plate 140 is exposed between the inner side surfaces of the protective sloping web 120 and the sound absorbing plate 170 integrated with the corrugated steel plate 140,
Wherein the corrugated steel plate (140) is combined with concrete laid to form the protective inclined web (120) with a plurality of studs (150) coupled to the inside as a front end connection material. Type girder.

The method according to claim 1,
The open railway passageway 210 opened longitudinally and upwardly is secured by the lower flange 110, the guard slope web 120 and the upper flange 130, and on the passageway 210, Wherein a rail (200) on which the vehicle (300) can be operated is installed.

delete

The method according to claim 1,
Wherein a plurality of PS strands 160 are installed on the end faces of the lower flange 110 and the warp inclined web 120 to introduce compression force into the U-shaped girder 100. [ Girder.

The method according to claim 1,
The corrugated steel plate 140 is extended to the upper flange 130. The corrugated steel plate 140 has a corrugated structure in which the corrugation and the valley are repeated at a predetermined pitch in the inner height section of the inclined web 120, Wherein a corrugated structure in which the crests and valleys of the corrugated steel plate (140) are repeated is arranged in the transverse direction or the longitudinal direction, or the transverse direction and the longitudinal direction are arranged in the zigzag direction.

A method of constructing a U-shaped girder (100) having a lower flange (110), a guarded inclined web (120) and an upper flange (130)
a) forming a corrugated steel plate (140) having a predetermined length, to which a plurality of shear connection members (150) are coupled;
b) attaching a sound absorbing plate (170) to the corrugated steel plate (140) and integrating them;
c) a web wall foam 230 having a predetermined inclination is fixedly installed on the bottom mold 220 and the reinforcing frame 240 and the corrugated steel plate are integrally formed on the bottom mold 220 and the web wall foam 230, (170);
d) connecting the sound absorbing plate (170) integrated with the corrugated steel plate to the reinforcing bar (240) using a foam tie (250);
e) installing a lower flange inner formwork (270) in the reinforcing mantle (240), placing and curing concrete between the floor formwork (220), the lower flange inner formwork (270) and the corrugated steel plate (140); And
f) forming a U-shaped girder (100) for noise reduction by demoulding the lower flange inner form (270), the web wall form (230) and the floor form (220)
The sound absorbing plate 170 integrated with the corrugated steel sheet in step b) is used as a permanent permanent wall form of the protective sloping web 120 by being connected to the web wall foam 230 by a foam tie 250, The upper end of the corrugated steel plate is extended so as to enclose the upper flange 130 of the U-shaped girder in the step (f), and after the step f), the sound absorbing plate 170 integrated with the corrugated steel plate 140 is inserted into the protective inclined web 120 and the corrugated steel plate 140 is combined with the concrete to be laid to form the guard sloping web 120 with a plurality of studs 150 coupled to the inside thereof as shear connection members Wherein the U-shaped girder is provided with a plurality of U-shaped girders.

8. The method of claim 7,
Wherein the sound absorption plate (170) in the step b) is formed by filling a lightweight concrete, an ascon or a sound absorption material on the corrugated steel plate (140) and attaching the light absorption concrete to the corrugated steel plate (140).

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8. The method of claim 7,
Wherein the reinforcing frame 240 of the step c) is manufactured such that the sheath pipe 260 for introducing the PS strand 160 for introducing the prestress is embedded.