SU1222739A1 - Construction of expansion with reinforcements of bridge span structure - Google Patents

Description

one

The invention relates to a bridge structure and can be used to broaden with the strengthening of bridge superstructures during their reconstruction,

The purpose of the inventions is to reduce the complexity of the reconstruction by eliminating the broadening of the girders of the bridge supports,

Figure 1 shows the broadening structure with reinforcement of the bridge span: in Figure 2, section AA is shown in Figure 1.

The broadening construction with reinforcement of the bridge span contains supports 1, girders 2, additional main beams 3 rigidly connected along the carriageway with the existing main beams 4 of the span, a device for supporting additional main beams having prestressed vertical suspensions 5 reinforced by upper the ends in the carriageway plate are parts of the existing main beams 4, transverse traverses 6 fixed on the suspensions 5 under the span near the supports 1 and projecting as cantilever sections extreme main beams 4 existing Spans, vkladshi the stop 7 placed with a tight fit between the

1222739J

corresponding transverse cross members 6 and lower ones on the existing nifix of the extreme main beams 4, with the broadening design with reinforcement

5 is provided with horizontal tension elements 8, located at least under the existing extreme main beams 4 and anchored in jmopax 7, and additional

10 main beams 3 are installed on the console sections of the transverse cross member 6 with the help of the supporting parts 9.

In the slab of the roadway beams 4 drill holes for suspension

15 5, they are installed with cross-arms 6 and stops 7, tension suspensions 5 to such a level that, under the most unfavorable loading of the span, the tensile stresses remain in the suspension-facing suspensions 5. A horizontal tension element 8 is installed and, for example, a bridge, up to the design force, after which additional 25 beams 3 are mounted.

The use of the proposed construction, with widening of the superstructure, reduces the labor intensity of the reconstruction by eliminating the work

30 for broadening the existence of the bridge supports.

V

V

l

Editor 0. Head

Compiled by, Zubkov

Tehred O. Sopko Proofreader V. But ha

1675/27 Circulation 514Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Branch PPP Patent, about Uzhgorod, ul „Project, 4

at

J

Claims (1)

STRENGTHENING STRENGTH CONSTRUCTION WITH BRIDGE STRENGTH STRENGTH, containing supports, crossbars, additional main beams rigidly connected on the carriageway plate with existing main span beams, device for supporting additional main beams, characterized in that, in order to reduce the complexity of reconstruction due to elimination the broadening of the crossbars of the bridge supports, the device for supporting the additional main beams is made in the form of prestressed vertical suspensions reinforced by the upper ends in the square those of the carriageway of the existing main beams, transverse traverses mounted on suspensions under the span structure near the supports and protruding by cantilever sections to the extreme main beams of the existing span structure, and liners with stops placed tightly between the corresponding transverse traverses and lower belts along at least existing extreme main beams, and the design of the broadening with reinforcement is provided with horizontal tensile elements located at least under the existing Raina main beams and anchored in the end, and additional main beams mounted on the cantilever portion laterally traverse. FIG. I