摘要
中跨合龙是大跨度混凝土桥梁悬臂施工中的关键工况。通过对跨越宁波奉化江大跨度V型连梁刚构桥悬臂施工过程中的中跨合龙施工进行模拟,分析了预加顶推力、合龙端两端高程高差以及温度变化等因素对中跨合龙施工的影响。根据得到的分析结果,给出了有益的施工建议,可为类似桥梁的施工提供有价值的参考。
The mid-span closure is the key stage in cantilever construction of large-span concrete bridge.According to the simulation of mid-span closure stage in cantilever construction of large-span continuous V-shaped rigid frame bridge over Ningbo Fenghua River, this paper analyzes the influencing factors of pre-imposed jacking force, elevation difference at two closure ends, and temperature variation on the construction of mid-span closure. Based on obtained analysis results, the paper provides the valuable construction proposal, which can be referred for the construction of the similar bridges.
出处
《城市道桥与防洪》
2014年第10期137-140,13,共4页
Urban Roads Bridges & Flood Control
基金
宁波市建设科技项目(甬建发[2011]187号
项目编号:20)
关键词
大跨度V型刚构
悬臂施工
中跨合龙
顶推力
影响因素
large-span v-shaped rigid frame,cantilever construction,mid-span closure,jacking force,factor analysis
