RU172964U1 - METAL SPAN STRUCTURE WITH CONTINUOUS BRIDGE WALLS WITH RAILWAY SANDLESS-WAY - Google Patents

Abstract

The utility model relates to the field of bridge building. EFFECT: increased reliability of a metal span with continuous walls of a bridge with a weld-free path. The metal span with continuous walls of the bridge with a continuous jointless rail contains two main beams connected to each other and supported by bridge supports through fixed and movable supporting parts, and a continuous jointless rail fixed uniformly on reinforced concrete prefabricated slabs of arbitrary length, resting on the upper shelves of the main beams through sliding carriages of antifriction material dispersed along the length of reinforced concrete prefabricated slabs and fixed supporting parts located under the ends of the iron Eton prefabricated panels in order to provide counterpart deformation of the main beams of the metal superstructure and reinforced concrete prefabricated slabs.

Description

The utility model relates to the field of bridge building.

Known metal span with solid walls with a ballast-free bridge fabric on reinforced concrete prefabricated slabs with direct attachment of rails to the plate, rigidly connected to the upper belts of the span (Metal bridges. Protasov K.G. and others. Publishing house 2nd Edition. in "Transport", 1973, p. 24).

The disadvantage of this design is the significant longitudinal temperature forces in the rails of the jointless track on the bridge, due to the joint work of the span and the rails of the jointless track on the bridge with changes in air temperature, resulting in a kink of the rail or ejection of the track, which reduces the reliability of the structure.

The closest technical solution to the claimed model adopted as a prototype is the span of a metal bridge with a weld-free path, containing two main trusses interconnected, a roadway made in the form of continuous metal continuous beams laid on transverse truss connected to nodes of the riding belt beams through movable and fixed supporting parts arranged in an order that provides the opposite direction of temperature deformations of the span and continuous longitudinal beams carriageway and rail track (RU No. 120107, E01D 6/00, 09/10/2014, bull. No. 25).

The disadvantage of this solution is the possibility of opening a large gap in the case of a break in the rails of the continuous joint path on the bridge with a significant decrease in air temperature.

The objective of the utility model is to reduce the longitudinal forces arising from the joint work of the span and the rails of the jointless track on the bridge with a change in air temperature in rails on a metal span with continuous bridge walls with a continuous jointless path.

EFFECT: increased reliability of a metal span with continuous walls of a bridge with a rail without joints.

The technical result is achieved by the fact that in a metal span with continuous walls of the bridge with a continuous jointless track, containing two main beams connected together, supported by bridge supports through fixed and movable supporting parts, and a jointless track laid on precast concrete slabs, The rail-free rail is evenly fixed to reinforced concrete prefabricated slabs of arbitrary length, resting on the upper shelves of the main beams through reinforced concrete prefabricated slabs distributed along the length t sliding carriages made of antifriction material and fixed supporting parts located under the ends of reinforced concrete prefabricated plates in an order that ensures counter deformations of the main beams of a metal span with solid walls and reinforced concrete prefabricated plates.

The essence of the utility model is illustrated by drawings: in FIG. 1 shows the proposed span, in FIG. 2 - section 1-1.

The metal span with continuous walls of the bridge with a continuous jointless rail contains two main beams 1, interconnected by ties 2, and rests on the bridge supports through fixed 3 and movable 4 supporting parts, and a railless jointless path 5 uniformly mounted on reinforced concrete prefabricated plates 6 of arbitrary length, resting on the upper shelves of the main beams 1 through reinforced concrete prefabricated slabs 6 distributed along the sliding carriage 8 of antifriction material, for example fluoroplastic, naphthene or metal roplasta and fixed support part 7 disposed under the ends of reinforced concrete precast slabs 6 in order providing reciprocal deformation of the main beams of the superstructure 1 of the metal and concrete precast slabs 6.

A metal span with continuous walls of a bridge with a continuous jointless rail with temperature changes works as follows. In the case of, for example, lowering the temperature, the main beams 1 of the span are shortened in the direction from the movable support parts 4, while the reinforced concrete slabs 6 are also shortened in the opposite direction. Due to the presence of slide carriages, 8 forces in the rails 5 of the jointless path do not occur, and in the case of a rail kink 5, a longitudinal force is transmitted to the fixed supporting parts 7 of the reinforced concrete slabs 6, while the gap opening size at the rail kink is reduced in proportion to the number of precast concrete slabs 6 laid to the main beams 1.

The described construction of a metal span with continuous walls of a bridge with a continuous welded rail allows to reduce longitudinal forces in the rails of a welded jointless path on a bridge due to the joint work of the span and rails with changes in ambient temperature, which increases the reliability and safety of operation of the structure.

Claims (1)

A metal span with continuous walls of a bridge with a continuous jointless track, containing two main beams connected to each other and supported by bridge supports through fixed and movable supporting parts, and a continuous jointless rail laid on precast reinforced concrete slabs, characterized in that the continuous jointless rail the path is uniformly fixed on reinforced concrete prefabricated slabs of arbitrary length, resting on the upper flanges of the main beams through sliding carriages dispersed along the length of the reinforced concrete prefabricated slabs of antifriction material and fixed support portions disposed at ends of the reinforced concrete precast slabs in a manner providing opposing main beams of the metal deformation of the span with solid walls and concrete precast slabs.

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