Bridge trackway longitudinal spacer assembly

Abstract

The invention provides a bridge track longitudinal isolation device belonging to the field of railway bridge and track engineering, which comprises a longitudinal partition wall between a steel track and a bridge, a slide layer and a limit support outside an abutment in sequence; both the longitudinal partition wall and the slide layer are arranged along the direction of the bridge length; ends of the longitudinal partition wall and the slide layer are put across the abutment and extended in the direction of the limit support; the longitudinal partition wall and the slide layer are identical in width, and the width is bigger than that of the steel track. The invention can be utilized to convent longitudinal strength between steel tracks and bridges into rather low friction force before transmitting the friction force to the limit support. Therefore, the invention greatly improves stress conditions between bridges and steel tracks; besides, temperature regulators can be eliminated for use on steel tracks, so as to reduce volume of routine maintenance work for steel tracks. Moreover, the invention can optimize structural dimensions of bridges, considerably reduce casting work volumeof abutments and bridge piers, therefore, construction investment is saved and construction cost is lowered.

Description

technical field [0001] The invention relates to railway bridge and track engineering, in particular to a bridge track longitudinal isolation device used in railway bridge and track engineering to reduce the transmission of the longitudinal interaction force between the bridge and the track. Background technique [0002] In the current railway bridge track engineering, such as figure 1 , 2 The shown rail 4 is connected to the bridge, and the rail 4 is arranged above the beam body of the bridge, and the rail 4 is connected to the beam body of the bridge through the fulcrum 5 . The bridge beam body is supported on the pier 9 and the abutment 2. The bridge girder body includes a continuous structural beam body 3 and a simply supported structural beam body 6, the support includes a movable support 7 and a fixed support 8, and the rail fulcrum 5 includes fasteners, sleepers and ballast beds. Under the action of temperature changes or train loads, the bridge will undergo displac...

AI Technical Summary

Problems solved by technology

However, the paradox is that due to the setting of the temperature regulator, the rail 4 becomes a weak link in this area. As the temperature changes and the driving frequency increases, the tip of the temperature regulator is prone to bending deformation or even breaking

Therefore, in order to ensure driving safety, the maintenance and repair work has to be increased and the temperature regulator replaced in time, so that the cost of the rail 4 continues to increase with the passage of time

On the other hand, in order to overcome the reaction force transmitted by the rail 4 to the bridge pier 9 and abutment 2 of the bridge, so that the structure of the bridge pier 9 and abutment 2 meets the force requirements, it is usually necessary to increase the structural dimensions of the pier 9 and abutment 2 Ways to solve this problem, the amount of masonry work of pier 9 and abutment 2 will increase like this, and the project investment will increase

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