Research on Construction Technology of Large-tonnage Prefabricated Box Girders for Passenger Dedicated Lines
Box girders play an important load-bearing role in railway bridges on passenger ded-icated lines.Therefore,research is being conducted on the construction technology of large ton-nage prefabricated box girders for passenger dedicated lines to meet increasingly high construction requirements.The construction process of large-tonnage prefabricated box girders for passenger dedicated lines is designed from three aspects:beam yard planning and layout,prefabricated box girder pouring,and prefabricated box girder transportation frame.The results show:as time in-creases,the electrical flux of each measuring point is less than 1 000 C,indicating that the box girder has strong impermeability;as the number of freeze-thaw cycles increases,the relative val-ues of elastic modulus do not exceed the construction standards and the change in mass loss is rel-atively small,indicating that the box girder has strong frost resistance;as the load increases,the deflection of the box girder continues to increase.When loaded to the final maximum load,the deflection is still less than 10 cm,indicating that the box girder has strong deformation resistance and meets construction standards.
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NSTL
万方数据
维普
