钢箱拱桥步履式顶推施工力学行为分析  

Mechanical Behavior Analysis of Step-up Push Construction of Steel Box Arch Bridge

作　　者：王国兴 WANG Guo-xing(The 1st Engineering Co.,Ltd.of China Railway 12th Bureau Group,Xi'an 710038,China)

机构地区：[1]中铁十二局集团第一工程有限公司,西安710038

出　　处：《价值工程》2020年第10期139-142,共4页Value Engineering

摘　　要：本文以某钢箱拱桥跨越城市高速公路为工程背景,介绍了步履式顶推施工技术,建立了全桥结构仿真模型,研究了拱肋和主纵梁的力学行为,揭示了应力和挠度的变化规律;现场布置弦式应变计对结构应力实时采集,布设沉降观测标进行挠度监控,并与计算值对比分析,确保施工顺利进行,对类似工程具有一定的借鉴意义。Based on the engineering background of a steel box arch bridge crossing an urban expressway,this paper introduces the walking push construction technology,establishes a full bridge structure simulation model,studies the mechanical behavior of arch ribs and main longitudinal beams,and reveals the change law of stress and deflection;arranges the string strain gauges to collect structural stress in real time,lays out settlement observation standards for deflection monitoring,and compares and analyzes with calculated values to ensure that the construction proceeds smoothly and has certain reference significance for similar projects.

关 键 词：步履式顶推 仿真分析 应力实测 力学行为分析 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]