Research on Cantilever Pouring Equipment for Railway Continuous Beams by Pretensioning Method
At present,the post-tensioning method is used to construct the vertical prestressing bar(finish-rolled thread steel bar)of the railway concrete continuous beam,due to the bad ductility of the existing vertical prestressing material(finish-rolled thread steel bar),the difficulty in controlling the verticality of installation,the difficulty in guaranteeing the quality of post-tensioning grouting,and the uncontrollable tensile stress,etc.,it is easy to cause the fracture and break-out accident of the vertical prestressed bar,and there is a hidden danger.In addition,there are some problems such as low work efficiency,low mechanization,and unensured material quality for continuous beam or T-type rigid frame cantilever pouring construction equipment.To sum up,this paper studies a set of XZXG-4 bridge-building machine equipment which integrates the construction of vertical prestressing bar by pretensioning method and cantilever pouring of beam section,this equipment has the characteristics of good stability,high degree of mechanization,less human intervention,easy installation and dismantling,and safe and reliable.This article elaborates on the structural composition and key construction technologies of bridge-building machines,and conducts finite element analysis on the overall stress of the equipment.
continuous beamvertical prestressed barcantilever pouringequipment of bridge-building machineforce analysis
万方数据
维普
