JPH11166206A - Connection structure of corrugated steel plate for bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of corrugated steel plates constituting the side face of a bridge, which prevents decrease in the strength in the connection parts and sufficiently brings the connection faces into contact with each other. SOLUTION: Shape steels 31 having an L-shaped section such as an angle steel or a channel steel are arranged along the connection end 3 of corrugated steel plates 1 to be connected. One side 33 of the L-shaped part is superposed with the connection end and the corner 35 of the L-shaped part is positioned at the edge 37 of the connection end. And further, the other side 39 of the L-shaped part is arranged to cross with the connection end at right angles and the shape steel is welded in the state bolt holes 41 are opened. The corrugated steel plates 1 are transported to the construction site in the welded state. Mutual connection ends 3 are arranged to butt each other and the bolts are inserted in the bolt holes 41 formed by superposing the mutual other sides 39 of the L-shaped parts of the shape steels 31 and piercing them, and these connection ends are fastened with nuts to join them together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for joining corrugated steel sheets forming side walls of a bridge.

[0002]

2. Description of the Related Art In general, the side wall of a bridge is made of concrete (PC). However, since the concrete is heavy and difficult to transport, it is proposed that the side wall be made of corrugated steel plate. Have been. The corrugated steel sheet used in this case is formed so that the corrugation proceeds in the longitudinal direction of the bridge (in the oblique horizontal direction in FIG. 2), and is joined to the adjacent corrugated steel sheet at the longitudinal end.

[0003] As shown in FIG. 6, there are various joining structures. First, there is a joining structure in which joining ends 3 of the corrugated steel sheets 1 are joined by welding at the site (FIG. 6A).
(B)). The joining structure by this welding is one in which the joining ends 3 are overlapped and the fillet welding is performed (FIG. (A)), and those in which the joining ends 3 are butted and groove-welded (FIG. (B)) There is. However, joining by such welding requires on-site welding, which makes the on-site work difficult, which is not preferable.

[0004] On the other hand, there is no such difficulty in the case of joining by bolts and nuts (FIGS. 6 (C) (D) (E) (F)). That is, the joining ends 3 are overlapped,
What is called lap bolt joining (the same figure (C)) in which the bolt 7 is passed through the bolt hole 5 opened in the joining end 3 and tightened by the nut 9 (FIG. (C)), the joining ends 3 are butted, and the attachment plates 11 are overlapped on both surfaces, There is a so-called attachment plate bolt joint (FIG. 1B) in which a bolt 7 is passed through a bolt hole 5 opened in communication with a total of three steel plates and tightened with a nut 9.

The joining end 3 is bent into an L-shape by press working to form a flange 13. The flanges 13 are overlapped with each other, the formed bolt holes 5 are communicated, and the bolts 7 and nuts 9 are tightened. There is a method called flange press bending joining (FIG. (E)).

In addition, instead of bending using a press, a flange 13 is formed by welding a flange plate 15 to the joint end 3, and the flange 13 is formed by welding with a bolt 7 and a nut 9 for joining (referred to as flange plate welding joint). FIG.

[0007]

In the above-mentioned prior art, the joining by tightening the bolt 7 and the nut 9 is easier than the case of joining by welding, but the work at the site is easy, but the overlapping bolt joining (same as above). (C)) and the bolted joint plate ((D) in FIG. 6) are connected to the outer surface of the side wall of the bridge (FIG. 6).
The bolt 7 was exposed on the upper side of each figure), and the appearance was impaired.

Further, the work of tightening the bolts 7 and the nuts 9 is performed from both the inner surface and the outer surface of the corrugated steel plate 1, and the work efficiency is deteriorated.

Further, these joinings are called friction joinings in which the friction between the corrugated steel plates 1 or the friction between the corrugated steel plates 1 and the attachment plates 11 plays an important role. The bolt pitch between the bolts 7 must be sufficiently long, so that the joint 3 becomes long, and this joint is larger than the other when the bridge side wall is viewed from the outside. Was also long, which impaired the appearance of the corrugations.In order not to impair the appearance of the corrugations, it was necessary to adopt a corrugated steel sheet with a sufficiently large corrugation pitch, The waveform shape was restricted.

[0010] On the other hand, an L-shaped flange is formed at the joint end 3 and bolting is performed (FIG. 1E).
(F)) does not have the above problems, but in the flange press bending joining (FIG. (E)), the portion of the flange 13 is formed by cold bending, and distortion due to this bending is caused. In order to suppress a decrease in strength, the radius of curvature R of the bent portion
Must be made sufficiently large, and the appearance of the joint portion 3 is deteriorated.

Further, in the flange plate welding connection (FIG. 2F), the flange plate 15 is easily distorted by welding, and the L-shaped portion of the flange 13 cannot have a sufficient perpendicularity, so that the flange plate 15 is joined. Problems were likely to occur in the adhesion of the surface.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In the present invention, an L-shaped portion formed at a joint end portion is tightened by a bolt and a nut. It is an object of the present invention to provide a joint structure in which strength reduction due to cold bending for forming can be avoided and a squareness of an L-shaped portion can be sufficiently obtained.

[0013]

Means for Solving the Problems To achieve the above object, a first invention is a corrugated steel sheet constituting a side wall of a bridge, the corrugated steel sheet being formed so that a corrugation advances in a longitudinal direction of the bridge.
In a joint structure in which a corrugated steel plate and an adjacent corrugated steel plate are joined by a bolt at a longitudinal end, a shaped steel material including an L-shaped portion in a cross section is arranged along a joint end of the corrugated steel plate, and the L-shaped portion is formed. With one side of the L-shaped portion overlapped with the joining end, the corner of the L-shaped portion was made to coincide with the edge of the joining end, and the other side of the L-shaped portion was orthogonal to the joining end, and bolted, A welded structure for corrugated steel plates for bridges, wherein welding is performed, butted ends are joined to each other, the other sides of the L-shaped portion of the shaped steel material are overlapped, and bolts are joined through bolt holes that are communicated with each other. is there.

According to a second aspect of the present invention, the shape steel material including an L-shaped portion in cross section includes an equilateral angle steel, an unequal angle angle steel,
This is a joining structure of a corrugated steel plate for a bridge, characterized in that an unequal-sided unequal thickness angle steel, a ball flat steel, or a channel steel is used.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, the corrugated steel sheet 1 is for forming the side wall 19 of the bridge of the bridge 17.

That is, the bridge 17 has a box-shaped cross section in which the concrete upper slab 21 and the concrete lower slab 23 are connected by the left and right side walls 19. An internal cable 25 is buried in each floor slab 21 and 23 in the longitudinal direction for reinforcement. The box-shaped interior is divided by partitions 27 at various points in the longitudinal direction, and an outer cable 29 connecting the partitions 27 passes through the box-shaped interior.

FIG. 3 shows a state where the corrugated steel sheet 1 constituting the side wall 19 of such a bridge 17 is shipped from a factory. That is, the large waveform 29 has a pitch of 2 to 6 pitches (2
The both ends of the corrugated steel sheet 1 formed at the pitch) in the direction (horizontal direction in FIG. 3) formed so that the corrugation proceeds are joint ends 3, and are flat and have a straight cross section (FIG. A)).

A non-equilateral angle iron 31 is welded to the joining end 3 as a shape steel material. That is, the trapezoidal angle steel 31 is arranged along the joint end, and the trapezoidal angle iron 31
One side 33 of the L-shaped section is overlapped with the joint end 3, and the corner 35 of the L-shaped part is positioned at the edge 37 of the joint end 3.
Further, the other side 39 of the L-shaped portion is orthogonal to the joining end 3,
A process for opening the bolt hole 41 is performed.

The bolt holes 41 are arranged in three rows in this example. Of course, the number and number of bolts vary depending on the design. Then, in the state where the processing has been performed, the corner 35 of the L-shaped portion and the edge 37 of the joint end 3 are welded 43, and L
The tip of one side 33 of the letter-shaped portion and the side surface of the joint end 3 are welded 4
5 is done.

The length of the unequal angle steel 31 at the joint end 3 of the corrugated steel sheet 1 is shorter than the width of the joint end 3 in the width direction. There is a portion 46 where the angle iron 31 does not exist. This portion is where the corrugated steel plate 1 is connected to the concrete upper slab 21 and the concrete lower slab 23 (FIG. 2).

The corrugated steel sheet 1 (see FIG. 3) in a state where these weldings 43 and 45 have been performed is transported to a site where a bridge is constructed. Then, the joining ends 3 of the corrugated steel sheet 1 are abutted against each other, the other sides 39 of the L-shaped portion of the unequal angle steel 31 are overlapped, and the bolt holes 41 are communicated. A bolt is passed through the connected bolt hole 41 and a nut is screwed in from the opposite side and tightened.

According to the above embodiment, the following effects can be obtained. That is, since the trapezoidal angle steel 31 is formed by hot working, it is not necessary to form an L-shaped portion by cold bending as in the related art, and it is possible to avoid a decrease in strength due to cold working. Can be.

The perpendicularity of the L-shaped portion of the unequal angle iron 31 is sufficiently ensured in advance, and when the unequal angle iron 31 is welded 43 and 45 to the joining end 3, the welding 4
3, 45 do not impair the perpendicularity of the L-shaped part and therefore L
The joining surface of the other side 39 of the letter-shaped portion can be in close contact.

Further, the bolts and nuts are not exposed on the outer surface of the side wall 19 of the bridge, and a good appearance can be obtained. In addition, the bolts and nuts can be tightened from the inner surface of the side wall 19 of the bridge, and only one worker may be needed in some cases.
Unlike a conventional case where work is performed from inside and outside, a plurality of workers are not required, and work efficiency is improved.

The joint 3 fastened with bolts and nuts must be painted, but the side wall 19 of the bridge must be painted.
The painting work can be performed only from the inner surface of the work, and the work becomes easy. Further, since the tightening by the bolt and nut is performed at the L-shaped portion, there is no restriction on the waveform shape such as a long straight portion as in the case of the conventional overlapping bolt connection or flange attaching plate bolt connection.

When the thickness of the two corrugated steel sheets 1 to be joined is different from each other, an auxiliary plate called a filler is overlapped on the joining end of the corrugated steel sheet having a small thickness according to the conventional contact plate bolt joining method. Although the size of the gap is not allowed to be formed between the both attached plates and the steel plate 1, such a filler is not required according to this embodiment.

That is, even if the thickness of the two corrugated steel plates 1 is different, the bolt holes 4 for drilling the L-shaped portions are formed.
By shifting the position of No. 1 by the difference of the plate thickness, it is possible to easily cope with it, and it is possible to prevent a step from occurring even when viewed from the outer surface of the side wall 19 of the bridge.

Depending on the design of the bridge, the bridge may be bent in a plane. In this case, for example, in the case of the conventional lap bolt joint (FIG. 6C), the bridge is overlapped. In the part to be bent, a plate material having a wedge-shaped cross section was interposed and joined to obtain a bending curve, but such interposition of the plate material would frictionally join the three plate materials, Therefore, it becomes necessary to secure a sufficient bolt pitch.

On the other hand, at the joining end 3 of the corrugated steel sheet 1, the L-shaped portion of the trapezoidal angle steel 31 is formed such that one is slightly smaller than 90 degrees and the other is slightly larger than 90 degrees. It is possible to cope with this, and such a plate material is not required. This is not limited to the trapezoidal angle steel, and even if other steel shapes are used, such an intervention becomes unnecessary by changing the angle of the L-shaped portion of the steel shape material in advance.

(Other Embodiments) In the above embodiment, a non-equilateral angle steel is used as a section steel material including an L-shaped portion in the cross section. Equal thickness angle steel, ball flat steel, channel steel, or the like can be used.

FIG. 4 shows a case where the ball flat steel 47 is used as the shape steel material. The same parts as those in FIG. 1 showing the above embodiment are denoted by the same reference numerals. FIG. 5 shows a case where a grooved steel 49 is used as a shape steel material. Note that the same parts as those in FIG. 1 showing the above embodiment are denoted by the same reference numerals.

[0032]

As described above, according to the first or second aspect of the present invention, a sectional steel material including an L-shaped portion is used in the cross section, and this steel shape is formed by hot working. Therefore, it is not necessary to form an L-shaped portion by cold bending as in the related art, and a decrease in strength due to cold working can be avoided.

Also, the perpendicularity of the L-shaped portion of the shaped steel material is sufficiently secured in advance, and this welding may affect the L-shaped portion when welding the shaped steel material to the joining end. And does not harm the squareness, so that the joint surfaces can be in close contact.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) is a perspective view of a joining portion for joining corrugated steel plates, and (B) is a cross-sectional view showing a shaped steel material provided at the joining portion of (A). It is.

FIG. 2 is an overall perspective view showing a bridge having a side wall formed by the corrugated steel sheet joined in FIG.

FIG. 3 is a perspective view showing one corrugated steel sheet constituting a side wall of the bridge of FIG. 2;

4A and 4B show another embodiment of the present invention and correspond to FIGS. 1A and 1B, wherein FIG. 4A is a perspective view of a joining portion for joining corrugated steel plates, and FIG. 4B is provided at the joining portion of FIG. It is sectional drawing which shows a shape steel material.

5A and 5B show still another embodiment of the present invention and are views corresponding to FIG. 1, wherein FIG. 5A is a perspective view of a joining portion for joining corrugated steel plates, and FIG. 5B is provided at the joining portion of FIG. It is sectional drawing which shows the shape steel material to be obtained.

6A is a cross-sectional view showing a conventional fillet welding connection, FIG. 6B is a cross-sectional view showing a conventional groove welding connection, FIG. 6C is a cross-sectional view showing a conventional overlapping bolt connection, and FIG. (E) is a longitudinal sectional view showing a conventional flange press bending joint, and (F) is a sectional view showing a flange plate welding joint.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Corrugated steel plate 7 Bolt 9 Nut 17 Bridge 31 Irregular angle iron (shape steel) 33 One side 35 Corner 39 Other side 41 Bolt hole 43, 45 Welding 47 Ball flat steel (shape steel) 49 Channel steel (shape steel)

Claims (2)

[Claims] 1. A corrugated steel sheet constituting a side wall of a bridge,
In a joining structure in which a corrugation is formed so as to advance in the longitudinal direction of a bridge and is joined to an adjacent corrugated steel plate at an end in the longitudinal direction by a bolt, a shaped steel material including an L-shaped portion in a cross section is joined to the corrugated steel plate Placed along the edge, one side of the L-shaped portion overlaps the joining end, a corner of the L-shaped portion coincides with the edge of the joining end, and the other side of the L-shaped portion is joined In a state where a bolt hole was drilled perpendicular to the end, welding was performed, the joining ends were butted together, and the other sides of the L-shaped portion of the shaped steel material were overlapped with each other, and the bolts were joined through the connected bolt holes. A structure for joining corrugated steel sheets for bridges. 2. The steel member having an L-shaped section in cross section, wherein: an equilateral angle iron, an unequal angle iron, an unequal angle angle iron,
The joint structure of a corrugated steel plate for a bridge according to claim 1, wherein a ball flat steel or a channel steel is used.