JPH022738Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a steel deck member for replacing bridges made of reinforced concrete deck slabs that require repair.

[Prior Art] When the reinforced concrete deck slab of a bridge becomes old and cracks appear, which poses a danger to its strength, it is necessary to replace the reinforced concrete deck slab.

Traditionally, when the need for reupholstery arose,
As shown in Fig. 4, in a reinforced concrete slab d which is integrally fixed onto the flange a of the main girder a via a dowel b and has asphalt c laid on the upper surface, the asphalt c and the reinforced concrete slab d are first laid. After being dismantled and removed by air gouging or core breaker, the structure is restored to the state shown in Figure 4 by arranging reinforcement, building formwork, and pouring concrete in the same manner as in the construction of conventional reinforced concrete bridges.

However, in the above conventional method, when replacing the reinforced concrete slab, the reinforced concrete slab is constructed again, which requires a large amount of on-site work such as reinforcing reinforcement, installing formwork, and constructing scaffolding. The construction period is extremely long due to the amount of concrete poured and its curing.

The long time it takes to replace reinforced concrete slabs in this way means that traffic is blocked during that time, which has become an important problem in light of recent traffic conditions.

For this reason, as described above, after dismantling and removing the reinforced concrete deck d, the steel deck slab e is welded and fixed to the flange a' of the main girder a as shown in FIG. 5, or as shown in FIG. As shown in the figure, it is considered that the steel deck slab e can be directly connected to the main girder a by fixing it with bolts g or the like, and then the steel deck slab e can be used for recladding.

[Problems to be solved by the invention] However, in both of these methods, it is necessary to remove the existing dowel b (see Figure 4) on the flange a', which obstructs the work, and the flange of the main girder a must be removed.
It is difficult to precisely align a' and the new steel deck e and make on-site adjustments (maintaining groove accuracy in the case of welding, and problems with hole misalignment and number of holes in the case of bolts). Furthermore, there was a problem in that the construction period was extended due to the above operations.

The present invention was developed in view of these circumstances.

[Means for Solving the Problems] The steel deck slab member for bridge re-cladding of the present invention includes a steel deck slab for laying asphalt etc. on the upper surface, and a steel deck member for laying asphalt etc. on the upper surface, and A connecting rib attached parallel to the lower surface of the steel deck, a compartment formed by a partition plate at a predetermined position between the connecting ribs, a bolt for level adjustment of the steel deck installed in the compartment, and the compartment. Adjustment holes formed in the steel deck above the room to adjust the bolts; and openings drilled at appropriate positions in the steel deck so that concrete can be poured between the connecting ribs in areas other than the compartments. It has a configuration comprising:

[Function] Therefore, the level of the steel deck is adjusted by adjusting the bolts through the adjustment holes, and the steel deck and main girder are connected by pouring concrete between the connecting ribs through the openings. Ru.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 shows the main girder 2 where the reinforced concrete slab has been dismantled and removed with most of the existing dowel 1 remaining.
The steel deck member 4 of the present invention is shown placed on the flange 3 of the figure.

As shown in FIGS. 2 and 3, the steel deck member 4 is installed parallel to the lower surface of the steel deck 5 so as to be located on both ends of the flange 3 in the width direction. The connecting ribs 6, 7, the partition plates 9 provided between the connecting ribs 6, 7 so as to be arranged at at least three locations on the entire steel deck 5 to form a compartment 8 between the connecting ribs 6, 7, A nut 11 is installed in the chamber 8 via a mounting plate 10, a level adjustment bolt 12 is screwed downward onto the nut 11, and the bolt 12 can be adjusted with a torque wrench (not shown). An adjustment hole 13 bored at the compartment 8 position of the steel deck slab 5, and a side dowel 14 fixed on the inner surface of the connecting ribs 6, 7 located in a part other than the compartment 8.
and an opening 15 provided in the steel deck slab 5 for pouring concrete at a position between the connecting ribs 6 and 7 other than the compartment 8. Note that 16 is an auxiliary U-trough.

When placing such a steel deck member 4 on the main girder 2,
Only the dowel 1 at the position corresponding to the compartment 8 is removed in advance. Alternatively, the compartment 8 may be designed to correspond to the position between the dowels 1.

After placing the steel deck member 4 on the main girder 2, insert a torque wrench or the like into the compartment 8 through each adjustment hole 13 on the steel deck 5 to adjust the screwing of the bolts 2. Then, the overall level of the steel deck slab 5 is adjusted.
After the level adjustment of the steel deck 5 is performed, concrete is poured from each opening 15 on the steel deck 5 to the position between the connecting ribs 6 and 7 excluding the compartment 8. When the concrete hardens, the steel deck 5 is integrated with the flange 3 via the connecting ribs 6, 7, side dowels 14, concrete, and dowels 1. If a gap is formed between the connecting ribs 6, 7 and the flange 3 during concrete pouring and the gap is larger than the allowable gap, fill the gap with caulking material 17 as shown in Figure 3. or provide a patch.

After that, the bolt 12 is pulled up so that the bolt 12 and the flange 3 do not come into contact with each other. Also, at this time, remove the bolts 12 as necessary and open the compartment 8.
Concrete may also be placed inside. After the above work is completed, asphalt or the like is laid on the steel deck slab 5.

As described above, when the steel deck member 4 of the present invention is used, the existing dowel 1 can be left as it is or almost as is and used for fixing the steel deck 5, which facilitates the disassembly and removal work. The existing structure can be used effectively, the steel deck slab 5 can be manufactured in advance at a factory, etc., and the main girder 2 is fixed onto the flange 3 using concrete. A considerable amount of error can be absorbed by concrete, and since the amount of concrete placed is small, on-site work can be reduced and the overall construction period for re-covering work can be significantly shortened. In addition, since the level of the steel deck 5 can be precisely adjusted using the bolts 12 inside the compartment 8, on-site adjustment is easy. As a result, metal contact between the steel deck slab 5 and the main girder 2 can be eliminated, and generation of noise due to vibrations of automobiles and the like can also be prevented.

Note that the present invention is not limited to the above-mentioned embodiments, and the asphalt may be laid on the steel deck slab 5 in advance in a factory or the like, and various other methods may be used as long as they do not depart from the gist of the present invention. Of course, modifications can be made.

[Effects of the invention] As explained above, according to the steel deck slab member for bridge resurfacing of the invention, the following effects can be achieved.

(i) Existing dowels on the main girder can be left as they are, or almost as they are, and used for fixing the steel deck slab, making dismantling and removal work easier and making effective use of the existing structure.

(ii) Since the existing main girder and the new steel deck can be integrally connected via concrete, considerable errors can be absorbed by the concrete, which eliminates the need for a high degree of connection accuracy. do not.

(iii) Since the amount of concrete to be poured is small, the time required for pouring is short and costs can be kept low.

(iv) Adjustment of the installation level of the steel deck can be easily and precisely performed on site.

(v) Through (i), (ii), (iii), and (iv) above, on-site work will be easier and simpler, and the overall construction period will be significantly shortened.

[Brief explanation of the drawing]

Fig. 1 is an overall explanatory diagram of the steel deck member for re-cladding a bridge according to the present invention, Fig. 2 is a view taken in the - direction of Fig. 1, Fig. 3 is a view taken in the - direction of Fig. 1, and Fig. 4 is a view taken in the - direction of Fig. 1. A schematic diagram to explain a general example of the conventional reupholstery method,
FIGS. 5 and 6 are explanatory diagrams showing an example of a conventional recladding method using steel deck slabs. 1 is a dowel, 2 is a main girder, 3 is a flange, 4 is a steel deck member, 5 is a steel deck slab, 6 and 7 are connecting ribs, 8 is a compartment, 9 is a partition plate, 10 is a mounting plate, 12 is a A bolt, 13 is an adjustment hole, and 15 is an opening.

Claims (1)

[Scope of utility model registration request] A steel deck slab for laying asphalt etc. on the upper surface, a connecting rib installed parallel to the lower surface of the steel deck so as to be located on the width end of the main girder flange, and a required position between the connecting ribs. A compartment formed by a partition plate, bolts for adjusting the steel deck level provided in the compartment, and adjustment holes formed in the steel deck above the compartment to adjust the bolts; A steel deck slab member for re-cladding a bridge, comprising an opening bored at an appropriate position in the steel deck so that concrete can be injected between the connecting ribs other than the compartments.