JPS6314906A - Construction method for re-covering bridge concrete floor panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for replacing bridge concrete deck slabs that require repair.

[Prior Art] In recent years, reinforced concrete deck slabs of bridges have become increasingly obsolete due to the increase in the number of heavy vehicles, and a large number of reinforced concrete deck slabs will need to be replaced in the near future.

Conventionally, when the need for such resurfacing arose, as shown in Fig. 2, a reinforced concrete slab d was fixed integrally onto the flange a of the main girder a via a dowel b, and had asphalt C laid on the top surface. First, the asphalt C and the reinforced concrete slab d are dismantled and removed by air gouging or a core breaker, and then reinforcement is placed, formwork is constructed, and concrete is poured in the same manner as in the construction of conventional reinforced concrete slabs. I am trying to restore it to the state shown in Figure 2.

However, in the conventional method described above, 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, installing formwork, and constructing scaffolding. This requires a very long construction period 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 slab d, the steel deck slab C is fixed onto the flange a° of the main girder a with bolts f, etc., as shown in Fig. 3. It is being considered to connect directly to the main girder a and re-clad it using a steel deck e.

[Problems to be solved by the invention] However, even in this method, it is necessary to remove the many existing dowels b (see Fig. 2) on the flange a° that obstruct work, and in addition, the flange of the main girder a It is difficult to precisely align and adjust the position of the new steel deck slab e on site (problems with bolt hole misalignment and number of holes), and the construction period is extended due to the above operations. It had

In view of these circumstances, the present invention is designed to allow concrete deck slabs to be easily replaced with steel deck slabs in a short period of time.

[Means for solving the problem] In the present invention, after removing the concrete slab, the key points of the dowel left on the main girder flange are completely treated, other parts are simply treated, and the fully treated part is A liner is placed and asphalt felt is placed in the simple treatment section, and a steel deck slab is installed on these liners and asphalt felt, and the steel deck slab and main girder flange are connected with bolts through the liner and integrated. I try to do that.

[Function] Therefore, the asphalt felt smoothes the irregularities of the dowel in the simple treatment section, and the liner equalizes the level difference due to the asphalt felt arrangement.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

In Fig. 1, 1 is the main girder after the reinforced concrete slab has been dismantled and removed, and in the present invention, the dowel 2 1° above the main girder flange is completely treated to a required extent to form a completely treated part 3, On the other hand, other parts of the dowel 2 are subjected to simple processing such as gas cutting to form a simple processing section 4.

Asphalt felt 5 is placed in the simple treatment section 4 to absorb the unevenness caused by the dowel 2 after cutting, and a liner 7 is placed in the complete treatment section 3 to eliminate the level difference caused by the asphalt felt 5, thereby creating a new floor. A steel deck slab 8, which is a plate, is placed on the main girder flange 1'' via the liner 7 and the asphalt felt 5, and the bolt holes 9 of the steel deck slab 8, which have been drilled in advance to match, and the liner 7 are placed on the main girder flange 1''. By passing the high tension bolts 12 through the bolt holes 10 of the main girder flange 1 and the bolt holes 11 of the fully processed part 3 of the main girder flange 1,
The steel deck slab 8 and the main girder 1 are integrated. In addition, 6 is asphalt pavement on the steel deck slab 8.

In the above, by tightening the high tension bolt 12, the dowel 2 remaining on the simple treatment section 4 is embedded in the asphalt felt 5 and is covered by the asphalt felt 5. Moreover, this also means that the remaining dowel 2 is subjected to corrosion-proofing, and furthermore, the transmission of vibration from the steel deck slab 8 is blocked, and the generation of noise is prevented.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the bridge concrete deck resurfacing method of the present invention, there is no need to remove all the dowels on the main girder flange, so resurfacing can be done easily and in a short period of time. This has the excellent effect of making it possible to carry out replacement work.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2 is a schematic diagram illustrating a general example of the conventional reupholstery method, and Fig. 3 is an explanatory diagram showing an embodiment of the present invention.
The figure is an explanatory diagram showing an example of a conventional recladding method using steel deck slabs. 1 is the main girder, lo is the flange, 2 is the dowel, 3 is the fully processed part, 4 is the simple processed part, 5 is the asphalt felt, 7 is the liner, 8 is the steel deck, and 12 is the tension bolt. .

Claims (1)

[Claims] 1) After removing the concrete slab, the key points of the dowel left on the main girder flange were completely treated, and other parts were lightly treated, with liner being applied to the fully treated area and asphalt felt to the lightly treated area. A bridge concrete deck tensioning method characterized in that a steel deck slab is installed on the liner and asphalt felt, and the steel deck and main girder flange are connected and integrated with bolts via the liner. Alternative method.