摘要
To ensure the safety of the integral hoisting of precast pier boxes for sea-crossing bridges,this study focused on the sidewall height of the pier box and the width of the hoisting sling as core variables,established a finite element model using ABAQUS,and conducted a safety analysis of the hoisting process.The results showed that optimal structural safety and cost-effectiveness were achieved by first casting the concrete base plate of the pier box,then constructing the sidewalls to a height of 500 mm,and subsequently using REE-100T eye&eye round slings for hoisting.Additionally,the implementation of local reinforcement measures(symmetrical stiffeners and steel sleeves)at the circular holes in the bottomplate of the pier box significantly alleviated stress concentration at these holes,effectively avoiding the risk of cracking caused by excessive local stress during the hoisting process.On-site hoisting practices verified the effectiveness of this optimized scheme,and the relevant research findings can provide a reference for the safety control of hoisting operations for similar large-scale precast components.
基金
the Professor Scientific Research Start-up Fund of Hezhou University(2025JSQD04)
the Special Project in Key Fields of the Guangdong Provincial Department of Education(No.2023ZDX3106).
