A construction method and structure for closing the mid-span of catenary non-stop continuous beam

Abstract

The invention belongs to a continuous beam mid-span closure construction method achieving uninterrupted power of a contact line and a structure of the method. The method comprises the steps of machining a lifting frame, laying a rail, installing an upper truss and a lower truss and transferring the lifting frame to a construction section, pouring reinforced concrete of the continuous beam mid-span closure construction section, dismantling formworks and moving and dismantling the lifting frame. The structure comprises the rail, a winch and the lifting frame, and the lifting frame is composed of the upper truss and the lower truss; the upper truss is located at the upper end of the lower truss, the four corners of the lower end of the upper truss are provided with lifting chain devices, and the lower ends of lifting chains of the lifting chain devices are connected with the four corners of the upper end of the lower truss; four steel wheels for supporting and moving are arranged at the lower end of the upper truss at intervals and located on the rail. According to the method and the structure thereof, outage of an electric railway line does not occur, uninterrupted power of the contact line is achieved, and the advantages of being high in construction speed, capable of saving labor, low in construction cost, good in pouring effect, high in safety, easy to operate and high in popularity are achieved.

Description

technical field [0001] The invention belongs to a construction method and a structure for closing the mid-span of continuous girders without power failure of catenary. Background technique [0002] At present, in the construction of the mid-span closure of the continuous beam of the two bridge parts (or the construction of the mid-span closure of the two bridge parts, that is, the construction of pouring reinforced concrete at the butt joint of the ends of the two bridge parts will connect the ends of the two bridge parts into an integrated structure. ), since the mid-span of the continuous girder of the two bridges is often located at or across the top of the catenary of the existing electric railway line, the safety management requirements for the construction of the existing line are strict, and the approval process is complicated, requiring that the construction must be within a given time (for The catenary power outage stop operation time of the existing electric railwa...

AI Technical Summary

Problems solved by technology

As a result, it takes a long time to set up and dismantle scaffolding, a long time to break the circuit, slow construction speed, laborious work, high construction cost, large impact on electric railway line transportation and poor safety.

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