JP2010229733A - Floor slab for bridge, made of steel pipe, floor slab structure for the bridge, and steel pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor slab for a bridge, which is constituted like a slab by connecting a plurality of steel pipes in parallel and suitably used, for example, as a steel floor slab of a road bridge; to provide a floor slab structure for the bridge, which is constructed using the floor slab for the bridge; and to provide the steel pipe for use in the constitution of the floor slab for the bridge. <P>SOLUTION: Top and bottom surfaces of the steel pipe 2 are flat approximately parallel to each other in a cross-section; both right and left side surfaces are perpendicular flat; a concave portion is provided in the approximately central portion of the perpendicular flat surface, and constituted in such a manner as to continue in an equal cross section in the longitudinal direction of the steel pipe 2; the steel pipes 2 and 2 adjacent to each other are arranged in parallel in such a manner as to face each other in the state of sandwiching a rod 20 between the lateral concave portions; connecting holes 2c are provided in symmetrical positions of both the right and left side surfaces of the each of the steel pipes 2, respectively; and the plurality of steel pipes 2 are joined like the slab and integrated together by means of a connecting steel material 3 which is inserted through the connecting holes 2c. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is configured by connecting a plurality of steel pipes in parallel to form a plate, and is constructed using, for example, a bridge floor slab suitably used as a steel floor slab of a road bridge, and the bridge floor slab The present invention belongs to the technical field of steel pipes used in the construction of bridge slabs and the construction of bridge slabs.

Conventionally, when it is necessary to renovate or renew a road bridge, for the purpose of short-term construction, renovation and renewal are carried out using a steel bridge floor slab constructed by connecting square steel pipes in parallel. Technology has been proposed and implemented.
For example, the invention of “floor slab and floor slab unit” disclosed in the following Patent Document 1 is a rod-shaped member in which a plurality of square steel pipes are arranged in a direction parallel to the bridge axis, and openings are provided on the side surfaces of the square steel pipes. Is passed in a direction orthogonal to the pipe axis, and the square steel pipes are fastened together to form a floor slab unit. Furthermore, the steel pipe for joining is arrange | positioned in parallel along the side surface of the said floor slab unit, the edge part of the said rod-shaped member is joined to the steel pipe for joining, and each floor slab unit is joined, and the floor slab bridge is comprised.

  In addition, the “bridge structure using a square steel pipe as a main girder” disclosed in Patent Document 2 below has a plurality of square steel pipes arranged in parallel and spaced apart, and a steel deck is placed on the plurality of square steel pipes. A floor slab is constructed by bridging, and a bridge structure is constructed by joining the square steel pipe and the steel slab with high-strength bolts.

Japanese Patent No. 3725892 (Japanese Patent Laid-Open No. 2004-285823) Japanese Patent No. 3726153 (Japanese Patent Laid-Open No. 2003-105716)

The inventions of “floor slab and floor slab unit” disclosed in Patent Document 1 and “bridge structure using a square steel pipe as a main girder” disclosed in Patent Document 2 each include a plurality of square steel pipes. You can pay attention to the novelty of using steel floor slabs and floor slab units by using them, and the fact that they have a weldless structure.
However, the present invention provides a steel slab that is superior in workability and high in safety to the floor slab unit described in Patent Documents 1 and 2 and the bridge structure.

  That is, the object of the present invention is that the steel pipe constituting the steel floor slab is a flat surface perpendicular to both the left and right side surfaces and has a concave surface portion at a substantially central portion thereof. When two matching steel pipes are arranged in parallel, both side surfaces are brought into a state where the flat portions are in intimate contact with each other, and further, a bar material is sandwiched between the concave surface portions so as to face each other. It is structured to support and reasonably handle the shearing resistance (shear stress) between the flat part that is closely attached and the bar and the concave part sandwiching it, ensuring structural integrity as a plate Bridge decks using steel pipes and bridge decks using the same bridge decks that provide excellent load-bearing performance and stability in the roadbed structure even when large tires are used when passing large vehicles. Structure, and its almost central part with a flat surface perpendicular to both sides The invention is to provide a steel pipe for use in construction of bridge floor plate has a concave portion.

As a means for solving the above-mentioned problem, the bridge slab according to the invention described in claim 1 is a bridge slab formed by connecting a plurality of steel pipes in parallel,
The steel pipe is a flat surface having a substantially parallel top and bottom surface in the cross section, and both the left and right side surfaces are vertical flat surfaces and has a concave portion at a substantially central portion thereof, and the concave surface portion is even in the longitudinal direction of the steel pipe. It is configured to be continuous in cross section,
Adjacent steel pipes are placed in parallel by facing each other with a bar between the concave parts of the side surfaces,
Each steel pipe is provided with a connecting hole in a symmetrical position on both the left and right side surfaces, and a plurality of steel pipes are joined and integrated in a plate shape by a connecting steel material passed through the connecting hole. To do.

The bridge floor slab according to the invention described in claim 2 is a bridge floor slab formed by connecting a plurality of steel pipes in parallel.
The steel pipe is a flat surface having a substantially parallel top and bottom surface in the cross section, and both the left and right side surfaces are vertical flat surfaces and has a concave portion at a substantially central portion thereof, and the concave surface portion is even in the longitudinal direction of the steel pipe. It is configured to be continuous in cross section,
Adjacent steel pipes are placed in parallel by facing each other with a bar between the concave parts of the side surfaces,
On both sides of the steel pipe group arranged in parallel, in the cross section, the upper surface and the bottom surface are flat surfaces that are substantially parallel, and the left and right side surfaces are vertical flat surfaces that have a concave portion at the substantially central portion thereof. The connecting steel pipe having a configuration in which the concave portion is continuous in a uniform cross section in the longitudinal direction of the steel pipe is disposed in parallel with the concave portion facing the concave portion of the adjacent steel pipe and the bar,
Each steel pipe and connecting steel pipe are provided with connecting holes at symmetrical positions on both the left and right side surfaces, and the end of the connecting steel material passed through the connecting hole of each steel pipe is fastened in the pipe of the connecting steel pipe. The plurality of steel pipes are joined and integrated in a plate shape.

The invention described in claim 3 is the floor slab for a bridge described in claim 1 or 2,
The rods sandwiched between the concave portions of a plurality of steel pipes arranged in parallel are arranged in an arrangement that does not interfere with the connecting steel material that has been passed through the connecting holes of each steel pipe.

The invention described in claim 4 is the bridge slab described in any one of claims 1 to 3,
The concave surface portion in the cross section of the steel pipe is formed by connecting an inclined surface inclined in an approximately 45 ° direction upward and downward with respect to the horizontal direction and an arc-shaped concave surface in a tangential direction.

The invention described in claim 5 is the bridge slab described in any one of claims 1 to 4,
The basic cross-sectional shape of the bar sandwiched between the concave portions formed on the side surfaces of the adjacent steel pipes is circular or octagonal.

The bridge slab structure according to the invention described in claim 6 is:
The bridge floor slab according to claim 1 or 2 is installed in an arrangement substantially perpendicular to the bridge girder for each steel pipe,
The bottom of one or a plurality of steel pipes selected from a plurality of steel pipe groups and the bottom of the connecting steel pipe are provided with consolidating openings for joining through studs installed on the bridge girder,
The steel pipe and the connecting steel pipe are characterized in that the bridge floor slab and the bridge girder are consolidated by filling a hardened material into a pipe formed by passing a stud installed on the bridge girder through the consolidation opening.

The invention described in claim 7 is the floor slab structure for a bridge described in claim 6,
The upper surface of the connecting steel pipe is provided with a working opening that exposes the end of the connecting steel material that has passed through the connecting hole on the side surface, and the connecting steel material that has been drawn into the pipe through the connecting hole of the connecting steel pipe. The end is fastened with a nut, tension is introduced into the connecting steel, a plurality of steel pipes are joined and integrated in a plate shape, and the pipe is filled with hardened material through the working opening, and the end of the connecting steel And a nut is embedded.

The invention described in claim 8 is the floor slab structure for a bridge described in claim 6 or 7,
In the connecting steel pipe, the end of the connecting steel material drawn into the pipe through the connecting hole on the side surface is fastened and the hardened material is filled in the pipe, and the stud installed on the bridge girder is passed through the fixing opening. A partition plate is installed in the pipe to limit the area where the hardener is filled and consolidated into the pipe, and the stud installed on the bridge girder is passed through the opening for consolidation in the steel pipe, and the hardener is filled in the pipe A partition plate for limiting and partitioning the area to be consolidated is installed in the pipe.

The steel pipe of the bridge slab according to the invention described in claim 9 is:
In the cross-section, the top and bottom surfaces are flat surfaces that are substantially parallel, the left and right side surfaces are vertical flat surfaces, and have a concave portion at the center. The concave surface is continuous in a uniform cross-section in the longitudinal direction of the steel pipe. It is set as the structure which carries out.

The invention described in claim 10 is the steel pipe of the bridge slab described in claim 9,
The concave surface portion of the steel pipe is formed by connecting an inclined surface inclined in an approximately 45 ° direction upward and downward with respect to the horizontal direction and an arc-shaped concave surface in a tangential direction.

The bridge floor board 1 of the invention described in claims 1 and 2 and the bridge floor slab structure described in claims 6 to 8 have flat surfaces 2a and 2a perpendicular to both the left and right side surfaces and a substantially central portion thereof. A plurality of steel pipes 2 having a concave surface portion 2b, 2b and a continuous cross section of the concave surface portion 2b in the longitudinal direction of the steel pipe 2, with a bar 20 or between the concave surface portions 2b, 2b on the side surface. The steel pipes 2 are arranged in parallel by facing each other with 21 sandwiched in a plate shape by a connecting steel material 3 passed through connecting holes 2c provided at symmetrical positions on both side surfaces,
In short, the steel pipe group 2... And the connecting steel pipe 5 are integrated with the bar 20 or 21 in parallel between the concave portions (2b and 2b) or (2b and 5b) on the side surfaces. The loading load (vertical load) acting on the floor slab is the flat part 2a or 5a in which the steel pipes (2 and 2) or (2 and 5) are in close contact, and the bar 20 or 21 and the concave part sandwiching this 2b is firmly received and supported by the shearing resistance (shear stress) exerted by it, and is transmitted to each other between the steel pipes so that the entire floor slab is loaded and processed. Therefore, it is possible to reliably prevent the vertical movement of the individual steel pipes 2 from occurring due to excellent load-bearing performance against a large tire pressure during passage of a large vehicle.

At that time, the steel pipe of the invention described in claims 9 and 10 is a flat surface in which the upper surface 2d and the bottom surface 2e are substantially parallel in the cross section, and the flat surface 2a, 2a perpendicular to both the left and right side surfaces. Since the concave surface portions 2b and 2b are formed by connecting an inclined surface inclined in an approximately 45 ° direction upward and downward with respect to the horizontal direction and an arc-shaped concave surface in a tangential direction, It is rational in terms of shear resistance (shear stress) exerted by the flat portion 2a in which the two and 2 are in close contact with each other, and the bar 20 or 21 sandwiched between the concave portions 2b and 2b between the side surfaces and the concave portion 2b sandwiching the rod Since it is configured to be received and supported effectively and transmitted between adjacent steel pipes and processed as an entire floor slab, when this steel pipe is used, structural integrity as a plate-like body is high, and large vehicles Big tie that acts when traveling It exhibits excellent load-bearing performance against such pressure.
Of course, even if the steel pipe 2 and the connecting steel pipe 5 are used, since the assembly can be performed without using any welding, the degree of freedom in design and construction is high. In addition, because it is a steel slab floor slab, it is lighter than a concrete structure and suitable for land transportation.

1 is a perspective view showing an embodiment of a bridge slab or a bridge slab structure according to the present invention. It is AA arrow sectional drawing of FIG. It is a BB arrow directional cross-sectional view of FIG. (A) is an expanded sectional view which shows the Example which used the rod material as the round bar. (B) is an enlarged sectional view showing an example in which the bar is a square bar having an octagonal cross section. It is a perspective view which shows the relationship between the bar in a steel pipe, and the steel for connection. It is the perspective view which showed the example of the connection means of a steel floor slab and a beam. It is the perspective view which showed the structural example of the road bridge by using the floor slab for bridges or the floor slab structure for bridges concerning this invention about the principal part.

In the cross section, the upper surface 2d and the bottom surface 2e are flat surfaces that are substantially parallel, the left and right side surfaces are vertical flat surfaces 2a, and have a concave portion 2b at a substantially central portion thereof, the concave surface portion 2b being in the longitudinal direction of the steel pipe 2 The steel pipe 2 having a continuous structure with a uniform cross section is used.
Adjacent steel pipes 2, 2 are arranged in parallel by facing each other with the bar 20 between the concave portions 2 b, 2 b on the side surfaces.
Each steel pipe 2 is provided with a connecting hole 2c in a symmetrical position on both the left and right side surfaces, and a plurality of steel pipes 2 are joined together in a plate shape by a connecting steel material 3 passed through the connecting hole 2c to be integrated into a bridge. A floor slab 1 is constructed.
Alternatively, as described above, on the both sides of the plurality of steel pipe groups 2 arranged in parallel, the upper surface and the bottom surface are flat surfaces that are substantially parallel, and the left and right side surfaces are vertical flat surfaces 5a at the substantially central portion thereof. The connecting steel pipe 5 having the concave surface portion 5b is arranged in parallel with the concave surface portion 5b facing the concave surface portion 2b of the adjacent steel pipe 2 with the bar 20 interposed therebetween, and both side surfaces of each steel pipe 2 and the connecting steel pipe 5 are arranged. The connecting steel 2 is passed through the connecting holes 2c and 5c provided in the above, and the ends thereof are fastened in the pipe of the connecting steel pipe 5 so that a plurality of steel pipes 2. Make up version 1.

  The above-mentioned bridge floor slab 1 or a bridge floor slab in which connecting steel pipes 5 are attached to both sides of the bridge floor slab 1 is installed in such a manner that each steel pipe 2 is arranged substantially perpendicular to the bridge girder 4. On the bottom surface of one or a plurality of steel pipes 2 selected from the steel pipe group 2... And the bottom surface of the connecting steel pipe 5, there are provided consolidating openings 5 e for coupling through studs 40 installed on the bridge girder. The stud 40 installed in the steel pipe 2 is passed through the consolidation opening 5e of the steel pipe 2 and the connecting steel pipe 5, the inside of the pipe is filled with a hardener 7, and the bridge floor slab 1 and the bridge girder 4 are consolidated to form a bridge floor. Build plate structure.

Hereinafter, the present invention will be described based on illustrated embodiments.
First, FIG. 1 conceptually shows the main part of an embodiment of a bridge slab according to the invention described in claims 1 and 2 and a bridge slab structure according to the invention described in claim 6. .
In the illustrated example, reference numeral 1 in FIG. 1 indicates a bridge floor slab that is laid and assembled on a bridge girder 4 using five steel pipes 2. The bridge slab 1 has a configuration in which the five steel pipes 2 are connected by passing through a connecting steel material 3 in a skewered manner in a horizontal direction perpendicular to the axis of the steel pipes 2 arranged side by side. A bridge floor slab structure is constructed by placing the bridge floor slabs 1 as a unit and arranging them in a continuous manner in the longitudinal direction on the bridge girder 4. Reference numeral 5 indicates connecting steel pipes arranged one by one along both side surfaces of the bridge floor slab 1. The connecting steel pipe 5 is a member for joining and integrating the adjacent bridge floor slabs 1 and 1 in series.
The bridge floor slab 1 of the present invention is preferably used when a bridge floor slab structure is constructed on a bridge girder 4 of a road bridge, but the application is not limited thereto. For example, it can be similarly used for construction of a steel floor slab structure of artificial ground.

  The steel pipe 2 used in the present invention is basically a rectangular shape whose upper surface 2d and bottom surface 2e are flat surfaces substantially parallel to the horizontal direction and long in the left-right direction, as shown in detail in FIGS. Shape. On both the left and right side surfaces, a concave portion 2b is formed at a substantially central portion of the vertical flat surface 2a so that the upper load can be applied and processed as a shearing stress with the bar 20 interposed therebetween. It is set as the structure which continues as a uniform cross section in the axial direction.

Incidentally, the size of the steel pipe 2 in the illustrated example is about 30 cm in length in the left-right direction and about 19 cm in height in the cross-sectional shape of FIGS. 2 and 3, and the thickness of the tube wall is about 12 mm. The vertical dimension of the flat surface 2a formed on the concave surface portions 2b on both sides is substantially 33 mm, and when the two adjacent steel pipes 2 and 2 are arranged in parallel, both side surfaces are The flat surfaces 2a and 2a are brought into close contact with each other.
The concave surface portions 2b and 2b on the both side surfaces are formed in the same shape and the same size with a depth to the back end of about 18 mm. The concave surface portion 2b has a direction of approximately 45 ° upward and downward with respect to the horizontal so that it is most reasonable to bear the loading load as a shear stress between the bar member 20 and the concave surface portion 2b sandwiching the bar member 20b. And an arcuate concave surface connected in a tangential direction.
The four corners of the steel pipe 2 and the corners of the concave surface portion 2b are rounded by about 2.5 times the tube wall thickness and are sufficiently rounded.
As shown in FIG. 3 and FIG. 4 (A), adjacent steel pipes 2 and 2 are parallel to each other with a round bar 20 in surface contact with the concave surface portion 2b between the concave surface portions 2b and 2b on the side surface. Shearing exerted by the flat portion 2a in which the steel plates 2 and 2 are brought into close contact with each other and the round bar 20 and the concave surface portion 2b sandwiching the steel plate 2 and 2 are applied to the bridge slab 1 for placement. Support firmly by resistance (shear stress). As shown in an enlarged view in FIG. 5, the bar 20 is cut in an arrangement that does not interfere with the connecting steel 3 that has been passed through the connecting hole 2 c of each steel pipe 2, and is perpendicular to the steel pipe 2. In the case of 5 is installed.
The bar sandwiched between the concave portions 2b and 2b of the steel pipes 2 and 2 can be implemented by a square bar having an octagonal cross section as shown in FIG. In this octagonal square bar, the angle of the upper and lower hypotenuses (inclined surfaces) is 45 ° upward or downward with respect to the horizontal direction, so that the inclined surface and the inclined surface of the concave portion 2b are in surface contact with each other. The load (vertical load) can be received and supported rationally and effectively by the shear resistance (shear stress) exerted by the square bar 21 and the concave portion 2b sandwiching the square bar 21. However, a square bar having a cross-sectional shape of a hexagonal shape, a decagonal shape, or the like can be sufficiently implemented as a bar material sandwiched between the concave portions 2b, 2b of the steel pipes 2, 2.

  At the symmetrical positions on both side surfaces of the steel pipe 2, there are provided connecting holes 2c penetrating in a straight line in the horizontal direction. The connecting holes 2c are provided at six locations in the axial direction of the steel pipe 2 at substantially equal intervals in the case of FIG. Therefore, as described above, the steel pipe group 2 in which the five pipes are laid as one unit of bridge floor slab penetrates into a common connecting hole 2c, one connecting steel member 3 in a skewered manner. As a result, joining that is integrated as a plate-like body is performed. For the connecting steel material 3, for example, a PC steel rod is preferably used.

In order to construct the above five steel pipes 2 as a unit slab for a bridge slab, on both sides of the bridge slab 1 laid on the bridge girder 4, there is a continuous structure with the adjacent bridge slab 1. As means for joining, connecting steel pipes 5 are arranged in parallel one by one (see FIG. 1). The connecting steel pipe 5 also basically has the same shape and size as the steel pipe 2 as shown in the enlarged cross section in FIGS. That is, the upper surface and the bottom surface are formed as flat surfaces that are the same height as the steel pipe 2 and are substantially parallel to the horizontal direction, the left and right side surfaces are vertical flat surfaces 5a, and have a concave surface portion 5b at a substantially central portion thereof. The concave surface portion 5 b is configured to be continuous in a uniform cross section in the longitudinal direction of the steel pipe 5. Therefore, the connecting steel pipe 5 is laid in parallel with the adjacent steel pipe 2 so that the bar 20 (or 21) is sandwiched between the concave portions 2b and 5b on the side surfaces.
This connecting steel pipe 5 is also provided with connecting holes 5c penetrating in a straight line in the horizontal direction at symmetrical positions on both side surfaces thereof. The connection holes 5c are arranged in common with the connection holes 2c of the adjacent steel pipes 2 and are provided at a plurality of locations (5 locations in the example of FIG. 1) in the tube axis direction. Further, the upper surface of the connecting steel pipe 5 is provided with the same number of work openings 5d for fastening the end portions of the connecting steel material 3 at positions close to the connecting holes 5c. As will be described later, the work opening 5d is a work for tightening the nut 6 to the end of the connecting steel material 3, and a work for filling a hardener 7 (usually concrete or mortar) as a rust preventive material. It is an opening used also for the operation | work which solidifies the said steel pipe 5 for connection to the bridge girder 4 using the stud mentioned later. Therefore, it is provided at a position suitable for each work in a shape and size that facilitates the work.

  As described above, the five steel pipes 2 laid in parallel on the bridge girder 4 so as to constitute one unit of the bridge slab 1 are connected to the connecting steel members 3 that are inserted into the connecting holes 2c in a skewered manner. Is connected to the inside of the connecting steel pipe 5 through the connecting hole 5c of the connecting steel pipe 5. As shown in FIG. 2, a male washer 3a previously machined into the end of the connecting steel member 3 is first fixed to the inner surface of the concave portion on the left side (or to the inner surface of the concave portion on the right side). After the washer 8) is installed, the nut 6 is screwed in, an appropriate tension (pre-stress) is introduced into the connecting steel material 3, and the plurality of steel pipes 2 are tightened in series and firmly joined in a single plate shape. Assemble the floor deck 1 for the bridge. Such assembling work is performed using the above-described work opening 5d of the connecting steel material 3. The nut 6 is a double nut for the purpose of locking.

FIG. 1 shows a configuration in which two bridge slabs 1 and 1 are adjacently joined to both sides of a connecting steel pipe 5 located in the center. And the state where another steel pipe 5 for connection is set to the near side position, and the next floor deck 1 for bridges is assembled and joined is shown. In the following, the same procedure as described above is sequentially repeated, and the necessary number of bridge floor slabs 1 are joined one after another on the long bridge girder 4 so that the necessary length for repairing, updating, or newly constructing the road bridge. Sano bridge slab structure is built.
As can be easily understood from the detailed view of FIG. 2, one connecting steel pipe 5 uses two connecting holes 5c, 5c on the left and right side surfaces thereof, so that two bridge floor slabs 1, 1 adjacent to both sides are provided. The ends of the connecting steel members 3 and 3 are introduced into the pipe (hollow part), and the nut 6 is screwed into the end of each connecting steel member 3 to structurally connect the two bridge slabs 1 and 1 on both sides. A bridge plate structure joined and integrated in a single plate can be reasonably and efficiently constructed.

  As shown in FIG. 2, as a final treatment after integrally joining two adjacent bridge floor slabs 1 and 1 on both sides of one connecting steel pipe 5, the work opening 5d described above is used. Then, a hardened material 7 such as concrete or mortar is filled in the hollow portion of the connecting steel pipe 5 for rust prevention to finish it into a structure that can be used permanently.

However, in order to complete the bridge floor slab structure, the structural connection between the bridge floor slab 1 and the bridge girder 4 is indispensable.
An example of the joining means is shown in FIG. FIG. 6 shows an example of a method for joining the bridge girder 4 using the above-described connecting steel pipe 5.
That is, an opening 5e for consolidation is provided in a necessary size and shape in advance on the bottom surface of the connecting steel pipe 5 and on the bridge girder 4. On the other hand, in the bridge girder 4, a plurality of studs 40 are erected vertically at a position where the consolidation opening 5 e on the bottom surface of the connecting steel pipe 5 is placed. The connecting steel pipe 5 is placed on the bridge girder 4 so that the stud 40 of the bridge girder 4 is inserted into the consolidation opening 5e on the bottom surface. After that, concrete as a hardener is filled into the pipe of the connecting steel pipe 5 and solidified with the stud 40, and the connecting steel pipe 5 and, consequently, the bridge floor slab 1 joined thereto are connected via the stud 40. The bridge girder 4 is structurally consolidated. In this case, the hardened material 7 (concrete) that rust-proofs the end portion of the connecting steel material 3 and the nut 6 and the hardened material that consolidates the stud 40 are used in common (that is, It is preferable that the concrete placement area is the same), since the number of operations is reduced and the ease and rationalization of each work can be achieved.
Further, when performing the work of filling the hardened material 7 into the pipe, as a technique for limiting the amount of the hardened material 7 to be filled into the pipe of the connecting steel pipe 5 to the necessary minimum limit, a connecting steel pipe is shown. It is effective to provide a partition plate 5f for partitioning the both sides in the tube axis direction of the working opening 5d and the consolidation opening 5e on the bottom surface to limit the concrete placement area. .

In addition, as another means for structurally consolidating the bridge floor slab 1 and the bridge girder 4, the bottom surface of one or more steel pipes 2 selected in consideration of the position from among the steel pipe groups 2 constituting the bridge floor slab 1 Further, a consolidating opening similar to the consolidating opening 5e on the bottom surface of the connecting steel pipe 5 is provided, and a stud is also provided at a position where the bridge girder 4 is aligned with the consolidating opening. Is placed on the bridge girder 4 so that the stud 40 of the bridge girder 4 is inserted into the opening for consolidation on the bottom surface. After that, it is also possible to carry out a method in which the steel pipe 2 is filled with a hardening material such as concrete and solidified with a stud, so that the steel pipe 2 and eventually the bridge floor slab 1 are solidified on the bridge girder 4.
However, the above-described consolidation means includes a case in which only the connecting steel pipe 5 is consolidated with the stud 40 or a method in which the steel pipe 2 is consolidated with the stud 40 separately, and an embodiment in which both are used in combination. Can be properly used.

Next, FIG. 7 shows the construction of a bridge floor slab structure on the bridge girder 4 using the bridge floor slab 1 constructed as described above, and applies it to a steel floor slab of a road bridge. An example of the case where a construction for renovating or updating a road bridge (or the same for a new construction) is performed is shown for the main part.
The illustrated road bridge is a series of a plurality of steel pipes 2 (or 20, 21; the same applies hereinafter) and a connecting steel pipe 5 on a bridge girder (beam) 4 straddling a river in the bridge axis direction. While constructing a bridge floor slab 1 joined in a plate shape, a steel bridge floor slab structure is constructed by laying it continuously over the entire length of the bridge girder 4 and using it as a steel floor slab, Concrete or base layer asphalt 10 as a roadbed is placed thereon, and a surface layer asphalt 11 is further laid to complete the road surface. Concrete is placed on both sides of the completed road bridge, that is, both ends in the pipe axis direction of the bridge floor slab 1 made of the steel pipe 2 and the connecting steel pipe 5 so as to serve as the road cover 13. Accordingly, the openings at both ends of the steel pipe 2 and the connecting steel pipe 5 are completely sealed by the ground cover 13 and can be used as a permanent structure. A rail 12 is built on the ground cover 13 to complete a road bridge.

  Although the present invention has been described above with the illustrated embodiment, the technical idea of the present invention is not limited to the embodiment. It should be noted that the present invention includes ordinary design changes, applications, and modifications made by those skilled in the art as needed without departing from the scope and spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Bridge deck 2 Steel pipe 2a Flat surface 2b Concave part 2c Connection hole 2d Steel pipe upper surface 2e Steel pipe bottom surface 40 Stud 5d Work opening 5e Solidification opening 5f Partition plate 6 Nut 7 Hardening material 20, 21 Bar material

Claims (10)

A bridge slab composed of a plurality of steel pipes connected in parallel,
The steel pipe is a flat surface having a substantially parallel top and bottom surface in the cross section, and both the left and right side surfaces are vertical flat surfaces and has a concave portion at a substantially central portion thereof, and the concave surface portion is even in the longitudinal direction of the steel pipe. It is configured to be continuous in cross section,
Adjacent steel pipes are placed in parallel by facing each other with a bar between the concave parts of the side surfaces,
Each steel pipe is provided with a connecting hole in a symmetrical position on both the left and right side surfaces, and a plurality of steel pipes are joined and integrated in a plate shape by a connecting steel material passed through the connecting hole. A floor deck for bridges. A bridge slab composed of a plurality of steel pipes connected in parallel,
The steel pipe is a flat surface having a substantially parallel top and bottom surface in the cross section, and both the left and right side surfaces are vertical flat surfaces and has a concave portion at a substantially central portion thereof, and the concave surface portion is even in the longitudinal direction of the steel pipe. It is configured to be continuous in cross section,
Adjacent steel pipes are placed in parallel by facing each other with a bar between the concave parts of the side surfaces,
On both sides of the steel pipe group arranged in parallel, in the cross section, the upper surface and the bottom surface are flat surfaces that are substantially parallel, and the left and right side surfaces are vertical flat surfaces that have a concave portion at the substantially central portion thereof. The connecting steel pipe having a configuration in which the concave portion is continuous in a uniform cross section in the longitudinal direction of the steel pipe is disposed in parallel with the concave portion facing the concave portion of the adjacent steel pipe and the bar,
Each steel pipe and connecting steel pipe are provided with connecting holes at symmetrical positions on both the left and right side surfaces, and the end of the connecting steel material passed through the connecting hole of each steel pipe is fastened in the pipe of the connecting steel pipe. A bridge floor slab characterized in that a plurality of steel pipes are joined and integrated in a plate shape.   The rods sandwiched between the concave portions of a plurality of steel pipes arranged in parallel are installed in an arrangement that does not interfere with the connecting steel material that is passed through the connecting hole of each steel pipe. Or the bridge slab described in 2.   The concave surface portion in the cross section of the steel pipe is formed by connecting an inclined surface inclined in an approximately 45 ° direction upward and downward with respect to the horizontal direction and an arc-shaped concave surface in a tangential direction. The bridge slab described in any one of 1 to 3.   The bridge slab according to any one of claims 1 to 4, wherein the basic cross-sectional shape of the bar sandwiched between the concave portions formed on the side surfaces of adjacent steel pipes is a circle or an octagon. . The bridge floor slab according to claim 1 or 2 is installed in an arrangement substantially perpendicular to the bridge girder for each steel pipe,
The bottom of one or a plurality of steel pipes selected from a plurality of steel pipe groups and the bottom of the connecting steel pipe are provided with consolidating openings for joining through studs installed on the bridge girder,
The steel pipe and the connecting steel pipe are characterized in that the bridge floor slab and the bridge girder are consolidated by filling a hardened material into a pipe passing through a consolidation opening with a stud installed on the bridge girder, Bridge slab structure.   The upper surface of the connecting steel pipe is provided with a working opening that exposes the end of the connecting steel material that has passed through the connecting hole on the side surface, and the connecting steel material that has been drawn into the pipe through the connecting hole of the connecting steel pipe. The end is fastened with a nut, tension is introduced into the connecting steel, a plurality of steel pipes are joined and integrated in a plate shape, and the pipe is filled with hardened material through the working opening, and the end of the connecting steel The bridge slab structure according to claim 6, wherein a nut and a nut are embedded.   In the connecting steel pipe, the end of the connecting steel material that has been drawn into the pipe through the connecting hole on the side surface is fastened and the hardened material is filled in the pipe, and the stud installed on the bridge girder is passed through the fixing opening. A partition plate is installed in the pipe to limit the area where the hardener is filled and consolidated into the pipe, and the stud installed on the bridge girder is passed through the opening for consolidation in the steel pipe, and the hardener is filled in the pipe The bridge slab structure according to claim 6 or 7, wherein a partition plate for restricting and partitioning the area to be consolidated is installed in the pipe.   In the cross-section, the top and bottom surfaces are flat surfaces that are substantially parallel, the left and right side surfaces are vertical flat surfaces, and have a concave portion at the center. The concave surface is continuous in a uniform cross-section in the longitudinal direction of the steel pipe. A steel pipe for a floor slab for bridges, characterized in that   The concave surface portion of the steel pipe is formed by connecting an inclined surface inclined in an approximately 45 ° direction upward and downward with respect to the horizontal direction and an arc-shaped concave surface in a tangential direction. Steel pipes for bridge slabs.

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