A method for dismantling the protective scaffolding of portal pier cover beams on existing railway lines

Abstract

The invention discloses a method for dismantling a protective shed frame of a gate-type pier capping beam of existing railway lines, and relates to the field of railway construction. According to the method, a steel pipe column is adopted in slotting; a carling of a D-shaped auxiliary beam is dropped inside the open slot of the steel pipe column, so that the height of the protective shed frame is decreased, and a working space is provided for dismantling a cross girder of the D-shaped auxiliary beam and oblique poles of the cross girder, and therefore the safety of existing railway lines is guaranteed, and meanwhile, the difficulty of taking out a pressed bearing bent cap of the protective shed frame is overcome. According to the method for dismantling the protective shed frame of gate-type pier capping beams of existing railway lines, after construction of the gate-type pier capping beam, the components positioned at the lower section of the gate-type pier capping beam, such as the D-shaped auxiliary beam, the steel pipe column, a joist steel, a scaffold and the like, are dismantled safely and quickly under the premise of guaranteeing the safety of the existing railway lines. The method for dismantling the protective shed frame of the gate-type pier capping beam of existing railway lines is suitable for large-scale promotion and application.

Description

【Technical field】 [0001] The invention relates to the field of railway construction, in particular to a method for dismantling a protective shed for a gate-type pier cover beam on an existing railway line. 【Background technique】 [0002] It is known that in order to meet the goal of building a well-off society in an all-round way, the railway network must expand its scale, improve its structure, improve its quality, rapidly expand its transportation capacity, and rapidly improve its equipment level. It is estimated that by 2020, the national railway operating mileage will reach 120,000 kilometers, the main busy trunk lines will realize passenger and freight separation, the double track rate and electrification rate will reach more than 50% and 60% respectively, and the transportation capacity will meet the needs of national economic and social development. At or close to the international advanced level. In the actual construction process of the railway, especially in some ...

AI Technical Summary

Problems solved by technology

Because the 37# and 38# gantry piers of the Baishan Village double-line extra-large bridge span the existing Hunan-Guizhou Railway, the cover beam weighs 480 tons, and the existing Bailey beam and rice steel overhead construction cannot be used due to the limitation of the clear height. The construction difficulty and The risk is very high. For this reason, the applicant has developed a construction method for the portal pier cover beam of the existing line. The D-shaped beams, steel pipe columns, I-beams, scaffolding, etc. are removed, so how to provide a more reasonable construction method is also particularly important.