Shenzhong Bridge was a 580 m+1 666 m+580 m full-floating suspension bridge,with upper,middle,and lower beams.The lower beam was a large-size box-shaped structure with variable cross-sections,which was located on the top surface of the cap and was in a consolidated form with the pylon and the cap.The structure was situated in the tidal change area of the Lingding Ocean.In view of the characteristics and difficulties in the construction of the lower beam structure,an asynchronous construction method was adopted,and the structure of drilled grouting piles with loc-king steel pipes was selected as the support and positive sealing system for the lower beam.To avoid temperature,shrinkage,and creep effects on the lower beam,a construction plan was proposed that adopted vertical pouring in 3 lay-ers and reserved a 1.5m post-pouring belt.
关键词
下横梁/异步施工/止水系统
Key words
lower cross beam/asynchronous construction/waterstop system
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