斜拉桥合龙施工方案优化与对比分析  

Optimization Scheme of Cable-Stayed Bridge Closure Construction and Its Comparison Analysis

作　　者：杨康[1] 陈月[1] 李铎[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《山东交通学院学报》2017年第3期62-66,73,共6页Journal of Shandong Jiaotong University

摘　　要：为解决合龙段浇筑过程中结构整体升温对劲性骨架的不利影响,以一座主跨为380 m的双塔三跨预应力混凝土斜拉桥为例,着重分析中跨合龙后再解除塔梁临时固结与合龙前先解除塔梁临时固结实现主梁纵向飘浮两种方案对桥梁施工阶段与成桥阶段的内力影响。根据现场实际情况采取先飘浮再合龙的优化施工方案。分析表明:优化方案在满足劲性骨架受力要求的情况下对结构永存内力与线形影响很小。该方案对悬臂浇筑的预应力混凝土斜拉桥施工有一定的参考作用。In order to solve the adverse effect of temperature rise of the overall structure in the process of closure, a double-tower and three-span prestressed concrete cable-stayed bridge with 380 m main span is taken as an example to analyze the effect in the construction stage and the completion stage of two central span closure construction schemes. According to the actual situation, the optimal construction program is achieved through the method of floating first and closing later, which provides some reference for the construction of theprestressed concrete cable-stayed bridge with cantilever casting.

关 键 词：斜拉桥 合龙 施工方案 

分 类 号：U448.275[建筑科学—桥梁与隧道工程]