JPS5858308A - Repairing of bridge beam floor plate by steel 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] The present invention is a bridge deck in which the aged reinforced concrete slab of a bridge is removed and restored by replacing it with a panel-type steel deck slab in a short period of time, and the load-bearing capacity of the bridge is increased. This is related to how to restore the version.

Conventionally, in a bridge having an ordinary steel main girder 1 as shown in Fig. 1, the following methods have been used to repair or restore the aged concrete slab 2 that has developed cracks, for example. There is.

(1) Apply resin, etc. to the cracked part of the concrete IJ-to.
There are methods of repairing the problem, such as by using a 4E person or by pasting steel tape on the bottom of the floor slab, but this method is only temporary and is not permanent.

(2) There is a method of adding vertical girders between each main girder, but this method does not provide a fundamental countermeasure against cracks in concrete.

(3) There is also a method of removing old concrete IJ-1 and pouring new concrete, but this method generally tends to increase the thickness of the concrete, and the dead load is undesirable because it increases

As described above, conventional repair and restoration methods have various drawbacks, so recently there has been an increase in the number of cases in which aged concrete is removed and replaced with steel deck panels.

In such cases, generally, the asphalt pavement 3 and concrete deck slab 2 of the bridge as shown in Fig. 1 are removed, and the deck plate 4 constituting the steel deck slab is removed as shown in Fig. 2.
A connecting member 5 made of, for example, T-shaped steel is placed at a position facing the main girder 1 on the surface of the
The vertical ribs 6 made of type steel, Lm steel, etc. are welded 1 to 1, respectively.
This is placed on a cross beam 7 attached to the main girder 1 and fixed to the flanges of the connecting member 5 and the vertical rib 6 by bolts to the flanges of the main girder 1 and the cross beam 7, respectively.

By the way, in such a conventional bridge restoration method using steel deck panels, there are many problems as described below, and an early solution has been desired.

(1) When restoring a bridge, there is generally a constraint that the road surface height must be the same before and after restoration.
The roughness of the connecting member 5 cannot be sufficiently removed. Therefore, the space between the flange of the main girder 1 and the deck plate 4 becomes particularly narrow, making it extremely difficult to fix the flange of the connecting member 5 to the flange of the main girder 1 with bolts.

(2) Since the bolt holes of the flange of the connecting member 5 and the flange of the vertical rib 6 are usually machined at the factory, it is extremely troublesome and time-consuming to match the bolt holes of the 7 langes of the main girder 1 machined on site. There is also a problem with 18 degrees - Hi, not just Gaka\ru Bakayo. .

(3) As shown in Fig. 3, when there is an on-site attachment part 1a on one side of the flange of the main girder 1, it is difficult to remove the connecting member 5 due to the existing bolts getting in the way. (4) Since the crossbeam 7t has the above-mentioned height, a notch must be provided at the connection with the main girder 1.
Not only is the work troublesome, but there is also a problem with strength.The present invention was made to solve the above-mentioned problems.It is easy to install steel deck panels, and the upper girder The purpose of this invention is to provide a method for constructing bridge decks that can increase the load-bearing capacity of the entire bridge, even though its rigidity is low.

In the present invention, when repairing or replacing an aging reinforced concrete deck of a bridge, after removing the reinforced concrete deck, a single digit web is welded to the flange of each main 1i, This relates to a method for restoring a bridge deck using a steel deck panel, which is characterized by placing a deck plate on the flange of 4(r) and welding its side end to the flange of the front @[!T girder. The present invention will be explained below using the drawings.

FIG. 4 is a perspective view of a temporary bridge for explaining an embodiment of the present invention;
FIG. 5 is a front view of the main parts. Note that the same parts as in FIG. 2 are denoted by the same reference numerals, and explanations thereof will be omitted. 8 is a stiffener plate welded to both sides of the main girder 1 made of T-shaped steel, 7a is a cross beam that supports the vertical rib 6 of the deck plate 4, and is made of ■-shaped steel, T-shaped steel, etc. It is attached to the stiffener plate 8 provided in 1. 5a is a single girder made of T-shaped steel, and its web is fillet welded to the flange of the main girder 1 on site as shown in FIG. Note that 10 is a cover plate 1/-t that connects the deck plate 4 in the bridge axis direction.

The restoration method of the present invention will be explained using the above-mentioned members as follows. First, the stiffener plates 8 are welded to both sides of each main girder 1, and the cross beams 7a are attached to the stiffener plates 8 of the main girder 1 using the splice plates 9. The cross beam 7a may be attached to the main girder 1 after removing the concrete slab 2, but the work time can be shortened if it is attached before removal. Then, as shown in FIG. 5, the web of one girder 5a is fillet welded to the flange of each main girder 1.

On the other hand, vertical ribs 6 made of T-shaped steel) L-shaped steel etc. are attached to the surface at the factory.
Transport the deck plate 4 with the web welded to the site,
The deck plates 4 are placed on the main girder 1 and the cross beam 7a, and the side ends of each deck plate 4 are placed on the flange of the first girder 5a at a predetermined interval, and the bridge axis of the deck plate 4 is placed on the main girder 1 and the cross beam 7a. Fillet weld the side end of the direction to the flange of the main girder 1. Next, the flange of each vertical rib 6 is fixed to the flange of the cross beam 7& with bolts, and finally, the cover plate 10 is attached to the joint of the deck plate 4 in the bridge axis direction.

According to the restoration method of the present invention as described above, the deck plate 4 is attached to the 1-digit flange by fillet welding.
It is easy to install even if there are some errors. Also, even if there is a joint part 1a (Fig. 6) on the flange of the main girder 1, 1
Since there are no bolts on the web to which the girder 5a is welded, attachment is possible, and therefore the deck plate 4 can be attached continuously in the bridge axis direction. Furthermore, the vertical rib 6
Since it is fixed with bolts only on the crossbeam 7a, the number of bolts is small and there is sufficient work space, making installation easy.

As detailed above, according to the present invention, not only is it extremely easy to install steel deck panels, but the existing main girder is integrated with the newly constructed single girder, so the upper flange is reinforced. The effects of implementation are significant, such as increased rigidity and load-bearing capacity of the main girder, that is, the entire bridge.

[Brief explanation of drawings]

Figure 1 is a side view to explain a reinforced concrete deck bridge, Figure 2 is a perspective view to explain the blowing method using conventional steel deck panels, and Figure 6 shows the flange part of the main girder. FIG. 4 is a perspective view for explaining an embodiment of the present invention, and FIG. 5 is a front view of the main parts thereof. 1. Main girder, 2. Reinforced concrete deck slab, 4. Deck plate, 5a. 'p girder, 6. Vertical rib, 7a. Cross beam. Agent Patent Attorney Masaru San Figure 1 Figure 2 Figure 3 Tsuba〆 Figure 4 Figure 5 Procedures Sodeichi (self-motivated) Mr. Commissioner of the Japan Patent Office 1985+= 111
Bi (On 1, Incident Display Percent Request No. 56-156090 No. 2, Title of Invention Method for Restoring Bridge Slabs Using Steel Deck Panels 3, Person Performing Sleeve 1F 4, Agent 6° Supplement, +Ti (7) Target: "Title of the invention", "Claims", "Detailed description of the invention", "
Drawing 7, "Brief explanation of the contents of the amendment" column and the appendix to the drawing (1) In the title of the invention in the specification, "Method for restoring bridge deck slabs using steel deck panels" is replaced with "Steel deck slab". Revised as ``Method for restoring bridge decks using panels.'' (2. The entire scope of the claims is amended as per the appendix. (3) The specification is amended as follows. (4) The phrase [reinforced concrete version] in lines 13 to 14 of page 1 of the specification is amended. (5) On page 6 of the specification, lines 3 to 6, the statement [consisting of vertical ribs 6... fixed with bolts] should be corrected as follows: [The vertical ribs 6 are in contact with each other and are fixed to the flange of the 7-lung metal main girder 1 of this connecting member 5 with bolts.'' (6) Specification '4F, page 5, line 11. ``R5a is a single digit made of T-shaped steel,'' is corrected to ``R5a is a single digit.'' (7) In the specification, page 5, lines 18 to 20, [stainer plate on the side] 8, and attach it to the stiffener plate 8.'' is corrected as follows. Wear 7a.” (8)
``Main digit 1'' on page 6, line 10 of the specification is corrected to [゛T digit 5aJ. (9) [1st digit 5] on page 6, line 19 to line m20 of the specification
The statement "There are no bolts on the web to be welded a" was corrected to "There are no bolts at the intersection of the first girder 5a and the splice part 1a attached to the top surface of the flange of the main girder 1." −
αQ Figures 6 and 4 of the drawings are amended as shown in the attached sheet. 11'81=d1 after amendment: Claim ``Repair or restoration of aged reinforced concrete 1/deck of bridge. After removing the reinforced concrete slab, weld one web to the flange of each main girder, place it on a deck plate on the flange of said one girder, and attach the side end to the flange of said one girder. A method for restoring bridge decks using steel deck panels characterized by welding." Figure 3 Figure 4

Claims (1)

[Claims] When repairing or restoring the aged reinforced concrete deck of a bridge, after removing the reinforced concrete deck, a web of Tm is welded to the flange of each main girder, and a deck plate is attached to the flange of that one girder. A method for restoring a bridge deck using a steel deck panel, the method comprising placing the steel deck panel on top and welding its side end to the flange of the single digit.