Analysis of the Key Control Points of the Load Test of Diamond-Shaped Hanging Baskets in the Cast-in-Place Cantilever Construction of Continuous Rigid Frame Bridges
The cantilever construction technology with hanging baskets of large-span bridges has high require-ments and high safety control pressure.This article takes the Niulanjiang Bridge on the Xuanwei-Huize Express-way in Yunnan as an example,and mainly discusses the assembly of diamond-shaped hanging baskets,the load test,measurement observation,deformation observation and data analysis.A graded preloading test is conducted,and when it is loaded to 120%of the construction load state of the box girder and the deformation of the support is less than 1mm/h,the preloading settlement of the hanging basket tends to be stable,ensuring the safety of the hanging basket structure.The load test provides technical support and reference for similar cast-in-place cantilever con-struction with diamond-shaped hanging baskets.
Diamond-shaped hanging basketCast-in-place cantileverPre-compression testKey control point
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