SU33554A1 - Method of reinforcing metal bridges - Google Patents

Description

Reinforcing metal bridges is extremely difficult, even when the structure of the bridge to be reinforced is simple. This is especially the case when capital enhancement is needed, when a whole series of systems and structures of superstructures, with existing reinforcement methods, either simply does not allow, or is not economically feasible, such as continuous trusses, trusses of all curvilinear systems. top som when driving on the bottom and so on.

By means of the proposed method, it is intended to eliminate the foregoing defects.

In FIG. 1-4 depict diagrams illustrating the proposed method for reinforcing metal bridges.

According to the proposed method, in the case, for example, of the need for capital strengthening of a two-span continuous truss, triangular metal trusses are installed on both sides of the support parts, on the outside of the span structure (Fig. 1, 2). The end nodes of the triangles are connected between themselves by transverse beams on which, through special supporting parts, a reinforced span structure rests. Between

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horizontal links are established on the lower triangular trusses themselves, and truss stands, above the old span, are cross-linked. The old span structure is thus reinforced by additional elastic supports, and in some cases it may be useful to initially create artificial reactions on these supports, which results in some unloading of the structure due to its own weight.

In the case when reinforcement of a multi-span bridge with a lowering is required, similarly to the first case, triangular trusses are installed on the supports, which should be provided with additional elastic supports for the spans to be reinforced. The terminal triangular trusses A are enclosed in the embankment (Fig. 3).

When reinforcing bridges consisting of split beam trusses, it may turn out that sometimes there will be negative support reactions at the ends of the reinforced trusses, and then it is necessary to put an anchor under each support end.

The proposed method, according to the inventor, is a method. reinforcing bridges by changing the system, which puts it in the same series as the reinforcement method using a spring chain or arch.

The subject matter of the invention.

A method of reinforcing metal bridges, characterized in that on the supporting parts of the cranes of the junction structure are installed on both sides of the triangular metal trusses, the lower end parts of which are connected by transverse beams designed to support the reinforced span structure.

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