Technology Improvement Research of Construction of Prefabricated Concrete Canopy in Railway Passenger Station
There are some problems in the application process of prefabricated concrete canopy,such as insufficient applicability of calculation model,small tolerance of grouting sleeve connection,easy misalignment of column body,excessively wide and overweight of roof middle plate,easy collision damage of buckle cover waterproof base structure,and weak resistance to temperature deformation.Through analysis and research,a new calculation model of'limited elastic simple support',the beam bottom splitting between the vertical rail beam and the canopy column members,the corrugated hole back inserted steel grouting anchorage connection,splicing three pieces of the middle plate of the prefabricated roof of the single beam and double column canopy along the rail,roof span and span buckle cover waterproof protection design,as well as precise positioning and hoisting technology and implementation.The application effect is good,the production and hoisting efficiency of prefabricated concrete canopy components are improved comprehensively,and the hoisting quality is improved.
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