SU1571126A1 - Widened span of bridge - Google Patents

Abstract

The invention relates to bridge construction and can be used in the reconstruction of steel-reinforced concrete and reinforced concrete bridge span structures. The aim of the invention is to reduce the laboriousness of installation, increase reliability and provide the possibility of using for spans with a slab having cantilevered overhangs with cutouts for fastening pavement blocks. The widened bridge span includes the main beams 1, the reinforced concrete slab 2 of the carriageway combined with them, the brackets 3 fixed on the main beams and the blocks of the 4 widths of the carriageway mounted on them. Each broadening unit is made in the form of a pair of runs 5, which are joined together by a metal sheet. The closest to the slab of the carriageway, 5 blocks of 4 widening, are provided with 2 supporting tables 12 located under the protrusions of the cantilever 11 overhangs of the reinforced concrete slab with a gap relative to its lower edge, into which the wedges are installed. 11 il.

Description

: l

4j

The invention relates to bridge construction and can be used in the reconstruction of steel-reinforced concrete and reinforced concrete bridge span structures.

The aim of the invention is to reduce the laboriousness of installation, increase reliability and provide the possibility of using for spans with a slab having cantilever overhangs with cutouts for attaching pavement blocks.

FIG. I shows the transverse structure of the superstructure, in cross section, cross section1, in Fig. 2, an expandable superstructure with hanging brackets, cross section} in FIG. 3 shows a broad span with metal wide blocks} in FIG. 4 shows a bridge, a view of the facade (blocks of widening are not shown), in FIG. 5 is a fragment of an extended span, in plan view, in FIG. 6 - block widening, top view; figure 7 is a section aa in figure 6; in FIG. 8 - section B-B in (Fig. 6; in Fig. 9 - section B-B in Fig. 6; in Fig. 10 - mounting of the kronschains | in Fig. 11 - mounting of the wider blocks.

The broadened span of the bridge includes the main beams 1, the reinforced concrete slab 2 of the carriageway combined with them, the brackets 3 fixed on the main beams and the blocks of the 4 width of the carriageway mounted on them. Each block 4 is broadened in the form of a pair of runs 5, combined on top by a metal sheet 6 with a cantilever section 7, mounted on the corresponding cantilever overhang 8 of an expanded concrete slab 2 with overlapping cut-outs 9 in it. Sheet metal 6 is supported from below by transverse ribs 10 projecting cantilever into the notches S of slab 2. The gates of the 5 blocks widening wider on either side of the carriageway on both sides of the superstructure are equipped with 11 supporting overhangs of the reinforced concrete slab 11 protruding from the 11 its faces, into which are installed wedges (not shown) 9, and between the cantilever section 7 of the 4 widening blocks and the corresponding cantilever overhang of the gel concrete slab 2 of the roadway is n flashing leveling layer made, for example, based on bitumen-epoxy kompozi- tion (not shown).

The installation of the widening construction is carried out as follows.

Worn pavement is preliminarily removed from reinforced concrete slab 2 and pavement blocks 13 are dismantled. After this, crane 14 hangs the main beams 1 on brackets 3 (figure 10) and fixes metal blocks 4 on them (Fig. "11). Thus, the supporting tables 12 are located under the protrusions 11 of the cantilever overhangs of the slab 2. Then the protrusion 11 is podked from the supporting tables and the pavement is laid. Before installing the next widening block on the overhangs of the reinforced concrete slab 2 and the protrusions 1 1 are placed in the bottom of the contact of the plate with the cantilever section 7 of the widening block 4 leveling waterproofing layer

Thus, the use of the proposed broadening design reduces labor intensity and increases reliability by using blocks

5 0 5 0

. . .

five

broadening in the form of metal-reinforced transverse ribs 10 with sheet 6, girders 5, fastened on brackets 3 and provided with supporting tables 12 for supporting after protrusion of protrusions 11 cantilever overhangs of reinforced concrete slab 2. As a result, temporary loading on cantilever overhangs 8 expandable reinforced concrete slab 2 ensuring its reliable operation on these effects.

The overlap in terms of cut-outs 9 and protrusions 11 with cantilever sections 7 of metal sheet 6 widening blocks 4 eliminates the need for concreting the cut-outs with exposed reinforcement of protrusions and cantilever overhangs of the reinforced concrete slab, which significantly reduces the labor-intensive work on broadening the span. The establishment of the transverse ribs 10 reinforcement of the sheet b between the projections 11 provides the required stiffness of the sheet to the local load between the projections. At the same time, the elimination of wet joints between the widening blocks 4 and the reinforced concrete slab 2 simplifies the work and further improves the operational reliability by turning off the wider blocks 4 from the joint bending work with the span, and therefore eliminates the overloading of the mount brackets 3 on the main beams. Laying in the zone of contact of the reinforced concrete slab 2 with the cantilever sections 7 of the sheet 6 of the 4 blocks of the broadening leveling waterproofing layer ensures the elimination of gaps between these elements, as well as their joint work. In addition, the use of blocks of the broadening of the described construction (instead of traditional reinforced concrete) also provides a reduction in the constant load on the expandable span and the brackets 2.5–3.0 times.

Claims (1)

Invention Formula The broadened span of the bridge, including the main beams, the reinforced concrete slab of the carriageway combined with them, the brackets fixed on the main beams and the blocks of the broadening of the slab of the carriageway mounted on them, in order to reduce the labor intensity assembling, increasing reliability and providing the possibility of using for spans with a slab having cantilever overhangs with cutouts for fixing pavement blocks, each widening block is made in the form of a pair of purlins combined on top with a metal sheet with a cantilever section attached to a corresponding cantilever overhang of the reinforced concrete slab with overlapping cutouts in it, while the metal sheet of the blocks of the broadening is supported by the bottom field, river ribs, protruding console-jr insulating layer FIG. 2 but in the cutouts of the reinforced reinforced concrete slab, and the runs of the broadening blocks on the sides of the span adjacent to the slab of the roadway are equipped with supporting tables with a gap relative to the lower edge of the cantilever overhangs of the reinforced concrete slab, and between the console section of the lower side leveling and corresponding cantilever overhang of the reinforced concrete slab of the carriageway is placed leveling hydro Fig. 1 Fig.z Fcgl Thebes, 5 / ///  t № § 1№ f ..y., .- w h | Г | F xjr W II And NKv / wwwVv / about 7 6B B I / ten FIG. eight 3.33  -J at - BUT FIG. eight H 5 6 / I 6 3- b7 / Thebes. 9 12 uk Editor L. Veselovska Compiled by V. Gonik Tehred M. Morgental Proofreader O. Kravtsova Order 1490 Circulation 460 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 / J + Subscription