JPH11222814A - Steel composite composite bridge using precast prestressed concrete slab - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a steel composite composite bridge using a precast prestressed concrete slab, which has a large effect of combining with a steel main girder and has good workability. SOLUTION: A plurality of stud dowels 13, 14, 15 are provided on the upper surface of an upper flange 12 of a steel main girder 10, and precast prestressed concrete slabs 20 are laid in parallel on the upper surface of the upper flange 12, and adjacent precast members are provided. The stud dowel is located at the joint between the prestressed concrete slabs 20 and the lower part of the precast prestressed concrete slab 20, and the filler 40 injected and poured from the joints is connected to the upper flange. The plurality of precast prestressed concrete slabs are integrated with the steel main girder by burying each of the stud dowels so as to fill a space portion and a joint joint with the lower surface of the precast prestressed concrete slab 20. I tried to make it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a steel main girder and a precast prestressed concrete slab (hereinafter referred to as a PC slab) integrated with a filler filling the lower side of the PC slab and a stud dowel. P configured to combine
The present invention relates to a steel composite composite bridge using a C slab.

[0002]

2. Description of the Related Art Conventionally, a PC is provided on an upper flange of a steel main girder.
A composite bridge in which floor slabs are arranged and fixed with mortar or the like is known.

[0003]

However, simply using a flat PC slab or introducing a prestress is not much different from a concrete steel composite bridge using a cast-in-place concrete slab. The essential functions of the plate cannot be fully utilized.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object to be solved by the present invention is that the effect of combining a steel main girder with a PC slab is significantly greater due to the stud dowel. An object of the present invention is to provide a steel composite bridge using a PC slab that can withstand loads and vibrations and has good workability.

[0005]

In order to solve the above-mentioned problems, a steel composite composite bridge using a PC floor slab of the present invention is provided with a plurality of stud dowels on the upper surface of an upper flange of a steel main girder. Precast prestressed concrete slabs are laid in parallel on the upper surface, and the stud dowel is positioned at the joint joint between adjacent precast prestressed concrete slabs and the lower part of the precast prestressed concrete slabs. Filling the space between the upper flange and the lower surface of the precast prestressed concrete slab and the joint by filling the filler injected and poured from the joint to bury each of the stud dowels, whereby the plurality of precast prestresses are filled. A concrete slab and the steel main girder are integrated and combined. It is intended to.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a steel main girder and a PC slab according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a part of a steel composite composite bridge, and FIG. 3 is a cross-sectional view of FIG. It is.

As shown in FIG. 1, a steel composite composite bridge 101 according to an embodiment of the present invention has a steel main girder 10 and a PC floor slab 2.
This is a configuration in which 0 and 0 are integrated and combined.

A plurality of steel main girders 10 are arranged in parallel along the length direction of the steel composite composite bridge 101,
And a steel material having at least an upper flange 12 provided on an upper end surface of the web 11.

The PC floor slab 20 is a concrete plate-like member manufactured in a factory or the like. The lower surface of the PC slab 20 has a channel shape having a hollow portion 21 extending along a length direction. Prestress has been introduced. The PC slabs 20 are laid in parallel on the upper surfaces of the plurality of steel main girders 10 provided in parallel so as to be orthogonal to each other.

The PC slab 20 is provided with a cutout 22 at a part of a side edge located above the upper flange 12 of the steel main girder 10.
A joint space 23 penetrating from the upper surface to the lower surface is formed by coupling the two notches 22. Also, PC
A connection hole 24 is provided at the center of the floor slab 20 in the width direction so as to be located on the straight line of the left and right cutouts 22 and above the upper flange 12.

On the upper surface of the upper flange 12 of the steel main girder 10, a first stud dowel 13 is located at a joint space 23 of an adjacent PC slab 20, and a second stud is located at a connection hole 24. And the third stud dowel 15 located inside the space 21 are provided upright by welding or the like. Each of the stud dowels 13, 1
4 and 15 are round bar-shaped, steel composite composite bridges 1 to be constructed.
The number to be provided is set according to the scale of 01, required load resistance, vibration resistance and the like.

Next, a procedure for constructing the steel composite composite bridge 101 using the PC floor slab will be described below.

(1) A plurality of steel main girders 10 are installed in parallel on a fulcrum of a pier or the like.

(2) Next, the upper flange 12 of the steel main girder 10
A plurality of PC floor slabs 20 are arranged orthogonally and laid in parallel on the upper surface of the PC. In this case, on the upper flange 12,
The joint space 23 is formed between the adjacent PC slabs 20, and the first stud dowel 1 is formed in the joint space 23.
3 is inserted from below, and the second stud dowel 14 is inserted through the connection hole 24 of each PC floor 20 from below. A third stud dowel 15 is located. Therefore, a pillow material, a shape member, etc. (not shown) are interposed between the upper surface of the upper flange 12 and the lower surface of the side edge of the PC floor slab 20, and the narrow communication space 25 is formed.
Is formed at the construction site, the joint space 23 and the space 2
1 will be in communication.

(3) Next, at a position other than the steel main girder 10, a prestressed steel wire (not shown) is inserted into a prestressed steel wire insertion duct (not shown) provided on the PC floor slab 20. Is inserted, and a sufficient tension is applied to introduce a prestress by the post-tension method, and the adjacent PC floor slabs 20 are tightly connected by tightening. Thereafter, grout is injected into the prestressed steel wire insertion duct. Further, in the adjacent PC floor slabs 20, joints other than the upper surface of the upper flange 12 may be filled with a joint material such as mortar or concrete to close the joint.

(4) Disposable mold frames 30 which substantially match the lower surface shape of PC floor slab 20 are previously formed on the left and right side edges of upper flange 12.
Is provided, the left and right sides of the space including the space 21 and the joint space 23 in the lateral width range of the upper surface of the upper flange 12 are closed. Therefore, a filler 40 such as non-shrink mortar or concrete is injected into the space from the joint space 23 and cast.

The injected filler 40 is filled in the joint space 2
3 through the narrow communication space 25 between the upper flange 12 and the lower surface of the side edge of the PC floor slab 20, the upper flange 1
2 and the lower surface of the PC floor slab 20,
The left and right sides are filled in the space (including the empty space 21 of the PC floor slab 20) surrounded by the discarded frame 30, and the filling state can be confirmed from the connection hole 24. When the filling material 40 fills the space, the filling material 40 overflows from the connection hole 24. At this stage, the filling of the filling material from the joint space 23 is terminated, and the space is filled. It can be confirmed that the filler 40 has been filled.

When the filler 40 is hardened, it hardens in the space surrounded by the upper flange 12 and the lower surface of the PC floor slab 20 and in the joint space 23. Each of the stud dowels 13,1
4, 15 are buried. Accordingly, since the steel main girder 10 and the PC slab 20 are firmly integrated with the hardened filler 40 and the respective stud dowels to be synthesized, all parts of each steel main girder 10 and the PC slab 20 are combined. By operating as described above, the composite bridge 101 in which the steel main girder 10 and the PC slab are combined is constructed. Note that the scrap frame 30 may be removed after the filler 40 has hardened, or may be attached as it is.

Although the present invention has been described based on the embodiments shown in the drawings, the present invention is not limited to the embodiments described above. Each of the above embodiments is an exemplification, and has substantially the same configuration as the technical idea described in the claims of the present invention, and has the same effect. Are also included in the technical scope of the present invention.

[0020]

As described above, the steel composite composite bridge according to the present invention has studs on the upper surface of the upper flange of the main steel girder at the joints between the PC slabs and at the positions below the PC slabs. A plurality of PC slabs are laid in parallel on the upper surface of the upper flange, and a stud dowel is positioned at a joint joint between adjacent PC slabs and at a lower position of the PC slabs. Filling the space between the upper flange and the lower surface of the PC slab with the filler injected from the joint and embedding the stud dowels to integrate the plurality of PC slabs and the steel main girder. Characterized in that they are combined with each other.

For this reason, the synthetic effect of the steel main girder and the PC slab is remarkably large, so that the load carrying capacity and vibration resistance can be improved, and the functions of the PC slab can be sufficiently exhibited and the PC slab is designed in advance. It is possible to construct a steel composite composite bridge that can guarantee a load-bearing function and a vibration-proof function. Besides, the workability is improved, and a prefabricated member composed of a steel main girder and a PC slab can be formed. Therefore, a segment method, an extrusion method, an overhang method, and a multi-span continuous steel composite bridge using the prefab member can be formed. Can be installed. Also, by reducing the girder weight, labor saving of bridge construction, shortening of construction period, safe construction,
This has a practical effect that construction costs can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a steel main girder and a PC slab according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a part of the steel composite composite according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Steel main girder 11 Web 12 Upper flange 13 1st stud dowel 14 2nd stud dowel 15 3rd stud dowel 20 Precast prestressed concrete floor slab 21 Empty 22 Notch 23 Joint empty 24 Connecting hole 25 Connecting air Part 30 Discarded formwork 40 Filler material 101 Steel composite composite bridge using precast prestressed concrete slab

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenori Manabe 2-12-1 Tenjin, Chuo-ku, Fukuoka City, Fukuoka Prefecture Inside Tenjin Building Fuji PS Co., Ltd. (72) Inventor Hisanobu Iwamoto Chuo-ku, Fukuoka City, Fukuoka Prefecture 2-12-1 Tenjin Inside Tenjin Building Fuji PS Co., Ltd. (72) Inventor Shigeyuki Matsui 4-6-4 Yamada Nishi, Suita-shi, Osaka

Claims (2)

[Claims] 1. A plurality of stud dowels are provided on the upper surface of an upper flange of a steel main girder, precast prestressed concrete slabs are laid in parallel on the upper surface of the upper flange, and adjacent precast prestressed concrete slabs are joined to each other. Position the stud dowel at the joint and the lower part of the precast prestressed concrete slab,
Filling the space between the upper flange and the lower surface of the precast prestressed concrete slab and the joint by filling material injected and poured from the joint, and burying each of the stud dowels, thereby forming the plurality of precasts. A steel composite composite bridge using a precast prestressed concrete slab, wherein the prestressed concrete slab and the steel main girder are integrated and combined. 2. A stud dowel is formed on a top surface of an upper flange of a steel main girder at a joint joint between a plurality of adjacent precast prestressed concrete slabs, a lower portion of a precast prestressed concrete slab, and a precast prestress. The steel composite composite bridge using the precast prestressed concrete slab according to claim 1, which is provided at a position of the connection hole formed in the concrete slab.