JPS5830441B2 - steel assembly bridge - Google Patents

Description

[Detailed Description of the Invention] This invention is a steel construction with a simple structure in which earth and sand is directly laid on a blank sheet floor plate to form a road surface without pouring concrete or using a reinforced concrete floor plate. This is about an assembly bridge, and its purpose is to create a simple bridge with excellent construction properties in which earth and sand are laid down as a road surface. Although it has a simple structure, it solves problems such as overturning of the ground covering material and absorption of stepping impact (impact like a clunk caused by passing vehicles, etc.) at both ends of the bridge.
The aim is to provide a steel assembly bridge that increases the rigidity of the bridge as a whole and enables long-term use.

Hereinafter, the structure of a steel assembly bridge according to an embodiment of the present invention will be described in detail with reference to the drawings. Reference numerals 1 and 2 indicate the bridge substructure that spans and passes the main girder 3, and this is composed of the H-shaped piles 4 and the upper end of the bridge structure. It is composed of pile beams 5 attached to the ground, and is retained by retaining walls 6 made of blank sheets.

The above-mentioned main girder 3 has several pieces placed at intervals between the pile beams 5 of the rain substructures 1 and 2 and is attached by bolt joints, and the upper surface of the main girder is covered with a floor slab 7 extending from a blank sheet. are arranged side by side and attached by bolted joints.

In addition, both ends of this deck I in the bridge axis direction are made into a soft reinforcing structure by the heavy attachment of attached blanks (7a), and the treads are shock absorbing treads made of channel steel placed at the ends of the girders to absorb shocks. material 8.

This stepping shock absorber 8 is attached to the main girder 3 by making a part protrude above both ends of the main girder 3 and being fitted into a bolt joint in a direction perpendicular to the bridge axis direction (as shown clearly in FIG. 2).

Reference numeral 9 denotes a ground covering material disposed at both ends of the road width, which is placed on the upper surface of the above-mentioned stepping shock absorbing material 8 and is firmly attached in the direction of the bridge axis by bolt connection, and is attached to the channel steel. Both ends of the floor slab 7 are fixed to the ground covering material 9 made of the above-mentioned material, and braces 10 are installed obliquely at close intervals between the ends of the floor slab and the ground covering material 9.

The attachment of this brace 10 to the floor slab 7 is simplified by using the attachment bolts of the floor slab blank sheet.

Reference numeral 11 denotes a column 12 that is erected on both sides of the bridge width, and is supported at two points by a base plate 1"3 on the floor slab 7 and a bracket 14 horizontally protruding from the top edge of the ground covering material 9. (as shown in Figure 4).

Reference numeral 15 shows a frame of an assembled bridge constructed by connecting the main girder 3, deck slab 7, treading impact absorbing material 8, and ground covering material 97), and earth and sand 16 is directly laid on the deck slab 7 of this framework. It is considered as a road surface.

As described above, this invention includes installing deck slabs made of blank sheets in parallel on the upper surface of the main girder, attaching treading impact absorbing materials to both ends of the main girder in a direction perpendicular to the bridge axis, and The framework of the prefabricated bridge is constructed by placing the ground covering material on top of the timber and attaching it to both ends of the road width in the direction of the bridge axis, and the road surface is created by directly laying earth and sand on this framework deck. Therefore, the on-site work only requires assembly and earthwork, and the construction is extremely easy and can be completed in a short period of time.

Even if the bridge has a simple structure with such earth and sand as the road surface, the collapse of the road surface earth and sand will not occur because the ground covering material is installed at both ends of the road surface spanning between the road shock absorbing materials. ,
Furthermore, there is no problem of the ground covering material falling over due to the Tonosho effect.

On the other hand, in the case of a road surface structure made by laying earth and sand, when a vehicle or the like passes at both ends of a bridge, a shock is applied to the treads such as a clunk, but in this invention, the tread shock absorbers that absorb this impact are Since it is attached to the
Problems such as damage to the step due to impact are completely eliminated.

Therefore, although the assembled bridge of the present invention has a very simple structure by laying earth and sand, the stability and rigidity of the bridge as a whole are improved, and it can be used for a long time.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of the steel prefabricated bridge of the present invention, Fig. 2 is an enlarged view of the end portion of the bridge, Fig. 3 is an enlarged view of the side portion of the bridge, and Fig. 4 is the constituent country of the elevated column mounting part. 3... Main girder, 7... Floor slab, 8... Treading shock absorber, 9... Ground covering material, 15... Bridge frame, 16... Earth and sand.

Claims (1)

[Claims] 1. A plurality of main girders are laid out at a predetermined bridge location, a deck slab consisting of blank sheets is placed in parallel on the upper surface of the upper girders, and a bridge axis is constructed by partially protruding above both ends of the main girders. A stepping impact absorbing material made of channel steel bolted in a direction perpendicular to the direction; and a ground covering material placed on the top surface of the stepping impact absorbing material at both ends of the road width and installed in the bridge axis direction. A steel assembly bridge characterized in that a road surface is formed by directly laying earth and sand on the deck of a frame constructed by connecting these to each other.