JPH03271408A - Steel floor bed for repairing bridge and method of attaching thereof - Google Patents

Abstract

PURPOSE:To eliminate height differences by forming a road surface plate and cross ribs, separately from each other, by providing an auxiliary main beam having a height which is low so that the upper surface of the road surface plate may be flush with the concrete floor plate having been removed, at the lower surface of the road surface plate, and by setting and fixing the auxiliary main beam onto a main beam. CONSTITUTION:A road surface plate 10 and cross ribs 11 are formed separately from each other. An auxiliary main beam 12 having a height which is low so that the upper surface plate of the road surface plate may be flush with a concrete floor plate having been removed, is provided at the lower surface of the road surface plate 10. Then, the auxiliary main beam 12 is set and fixed on a main beam from which the concrete floor plate have been removed. Ribs 15 for reinforcing the sides of the road surface plate 10 are made to abut against and is then connected to side rib reinforcing plates 17 on the upper surfaces of the cross ribs 11 having their ends fixed to both sides of the main beam 1. With this arrangement, it is possible to eliminate a height difference between the attached road surface and the existing road surface.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to bridges such as expressways, which are used to replace concrete deck slabs used for road surfaces with steel deck slabs because they have become obsolete. This article relates to repair steel deck slabs and how to install them.

[Conventional technology] As shown in Figure 3, conventional bridges have a concrete deck slab 2 in which reinforcing bars are inserted and concrete is cast on top of the main girder l.
There are some that have been installed as road surfaces.

If it becomes necessary to replace the road surface because such a concrete slab 2 has become obsolete due to long-term use, the aged concrete slab 2 is removed, new reinforcing bars are erected and concrete is poured, and a new one is constructed. concrete floor slab 2
If the bridge is replaced, it will take several days to assemble the reinforcing bars, place the concrete, and harden the concrete, which is not desirable for bridge repair work because it will lengthen the period of disruption to traffic.

On the other hand, a steel deck slab 3 shown in FIG. 5, which is assembled from steel plates by welding or the like, is used as the deck surface of a bridge. The steel deck slab 3 has horizontal ribs 5 welded to the lower surface of the road plate 4.
The vertical rib 6 and the auxiliary main girder 7 are welded in a direction perpendicular to the vertical rib 6 and the auxiliary main girder 7.

In order to make the strength of the steel deck slab 3 the same as that of the concrete deck slab 2, the height 8 of the steel deck slab should be made larger than the height 9 of the concrete deck slab (see Figure 3). There is a need.

[Problems to be Solved by the Invention] As shown in Fig. 4, when the conventional steel deck slab 3 is installed as is on the main girder 1 after the concrete deck slab 2 has been removed, the height 8 of the steel deck slab is Since the height of the steel deck slab 3 is greater than the height 9, the position of the road surface plate 4 of the steel deck slab 3 is higher than the top surface of the concrete slab 2 that had been used up until then, creating a step between it and the access road. There was a problem with it.

The present invention solves these problems and provides a steel deck slab for bridge repair and a steel deck slab for bridge repair that does not create a level difference between the concrete deck and the access road even if the concrete deck is replaced with a steel deck. The purpose is to provide a mounting method.

[Means for Solving the Problems] The present invention configures a road board and a horizontal rib separately, and the bottom surface of the road board is placed on the main girder while the top surface of the road board is placed on the main girder. A low-height auxiliary main girder is fixed to the same height as that of the concrete deck slab, and a large number of vertical ribs are fixed to the lower surface of the road slab in parallel with each other. and the lower surface of the road surface plate, and a lateral rib side reinforcing rib is vertically fixed to the upper surface of the lateral rib in a manner corresponding to the position of the road surface plate side reinforcing rib. Steel deck slabs for bridge repair are featured, and horizontal rib side reinforcing ribs are fixed vertically to the upper surface.Both ends of the horizontal ribs are fixed to the sides of the main girder.The concrete deck slab is removed and the road plate is placed on the main girder. The auxiliary main girder fixed on the lower surface is placed and fixed, and the surfaces of the reinforcing rib on the road plate side fixed vertically across the vertical rib on the lower surface of the road plate and the lower surface of the road plate and the reinforcing rib on the horizontal rib side are brought into contact and connected. This is a method for installing steel deck slabs for bridge repair, which is characterized by:

[Function] The separate road surface plate and horizontal ribs will be connected later to form an integrated steel deck.

By connecting the auxiliary main girder to the reinforcing rib on the side of the road plate of the road plate, which fixes the auxiliary main girder on the main girder, to the reinforcing rib on the side of the transverse rib on the upper surface of the transverse rib, which has both ends fixed to the side surface of the main girder. ,
The steel deck deck will be at the same height as the top of the removed concrete deck.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, 10 is a road board, l! is a horizontal rib,
Conventionally, the parts were integrated as explained in FIG. 5, but in the present invention, they are constructed separately.

An auxiliary main girder 12 and a large number of mutually parallel vertical ribs 13 are fixed to the lower surface of the road surface board IO. The height 14 of the auxiliary main girder 12 to the top surface of the road plate 10 is lower than the height 8 of the conventional steel deck shown in FIG.
2 is placed on the main girder L as shown in Figure 2, the height of the top surface of the road slab IO is the same as the height 9 of the concrete slab (see Figure 3). ing. A road plate side reinforcing rib 15 is fixed vertically across each pair of vertical ribs 13, which are fixed in parallel to the lower surface of the road plate 10, and the lower surface of the road plate 10. 1
5 has a large number of bolt insertion holes I6 bored therein.

On the upper surface of the horizontal rib 11, the aforementioned road plate side reinforcing rib 15 is provided.
The horizontal rib side reinforcing ribs 17 are fixed vertically so as to correspond to the positions of the horizontal rib side reinforcing ribs 17, and the horizontal rib side reinforcing ribs 17 are arranged so as to match the arrangement of the bolt insertion holes l6 of the road plate side reinforcing ribs 15. A bolt insertion hole 18 is bored.

On the side of the main girder 1 from which the concrete slab 2 has been removed, the first
As shown in FIG. 2, the sub-plate 19 is fixed, and this
Both ends of the horizontal ribs 11 are fixed to the side surfaces of the main girder 1 via bolts 9. Both ends of the horizontal rib 11 are fixed to the sub-plate 19 by bolting or welding.

The auxiliary main girder 12 of the road plate 10 is placed on the main girder l as shown in FIG. The lower end of the main girder 12 is fixed to the main girder 1.

Next, a bolt is inserted into the bolt insertion hole 113° 18 of the road plate side reinforcing rib 15 and the horizontal rib side reinforcing rib 17 whose surfaces are in contact with each other, and the road plate side reinforcing rib 15 and the horizontal rib side reinforcing rib 17 are inserted. Combine with. As a result, the road surface board 10 and the horizontal ribs 11, which are constructed separately, are integrally coupled via the road surface board side reinforcing ribs 15 and the horizontal rib side reinforcing ribs 17, thereby maintaining sufficient strength.

Note that the road plate side reinforcing ribs 15 and the horizontal rib side reinforcing ribs 17 may be connected by welding instead of bolts. In this case, there is no need to drill the bolt insertion holes 16, 18.

[Effects of the Invention] When replacing the concrete deck slab of a bridge with a steel deck slab, the present invention comprises the steel deck slab with a separate road plate and horizontal ribs, and connects the horizontal ribs between the main girder side parts. Since the road slab is fixed on the main girders and horizontal ribs, the height of the road surface of the steel deck slab can be made the same as that of the concrete deck slab, making it easier to maintain the same height as the access road. There is no difference in level between the two, and sufficient strength can be maintained while keeping the height of the road surface low.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view showing a state in which a road plate and horizontal ribs are combined, Fig. 3 is a longitudinal cross-sectional view of a concrete slab, and Fig. 4 FIG. 5 is a vertical cross-sectional view showing the difference in height between a concrete deck slab and a conventional steel deck slab, and FIG. 5 is a vertical cross-sectional view of a conventional steel deck slab. In the figure, 1 is the main girder, 2 is the concrete slab, IO is the road plate, 11 is the horizontal rib, ■2 is the auxiliary main girder, 13 is the vertical rib, 14
15 is the height, 15 is the reinforcing rib on the road board side, and 17 is the reinforcing rib on the side rib side. Figure 1

Claims (1)

[Scope of Claims] 1) In the case where the road surface plate and the horizontal ribs are configured separately, the lower surface of the road surface plate is placed on the main girder, and the upper surface of the road surface plate is a concrete floor plate before removal. A low-height auxiliary main girder is fixed to the lower surface of the road surface plate, and a large number of vertical ribs are further fixed in parallel to each other on the lower surface of the road surface plate. For bridge repair, characterized in that a reinforcing rib on the road plate side is vertically fixed to the upper surface of the horizontal rib, and a reinforcing rib on the side rib is fixed vertically to the upper surface of the horizontal rib in a manner corresponding to the position of the reinforcing rib on the road plate side. Steel floor version. 2) Both ends of the horizontal rib, with the horizontal rib side reinforcing rib fixed vertically to the upper surface, are fixed to the side of the main girder, and the auxiliary main girder fixed to the lower surface of the road plate is placed on the main girder from which the concrete floor plate has been removed. 2. The reinforcing rib on the road surface board and the reinforcing rib on the lateral rib side, which are fixed and fixed vertically across the vertical rib on the lower surface of the road surface board and the lower surface of the road surface board, are joined by bringing their surfaces into contact with each other. How to install steel deck slabs for bridge repair.