超高混凝土塔柱C55高性能混凝土防裂技术研究  

Research on Crack Prevention Technology of C55 High-performance Concrete for Ultra-high Concrete Tower Columns

作　　者：杨斌 YANG Bin(Anhui Jiangxi Railway Anhui Co.,Ltd.,Hefei 230011,China)

机构地区：[1]皖赣铁路安徽有限责任公司,合肥230011

出　　处：《价值工程》2024年第35期97-100,共4页Value Engineering

摘　　要：公铁两用桥梁作为现代交通工程的杰出代表,其建设过程融合了复杂的工程技术和严格的质量要求,旨在满足公路与铁路的双重通行需求,并提升区域间的互联互通效率。大体积混凝土作为桥梁结构中的核心材料,其施工质量对于桥梁的安全性和耐久性具有至关重要的影响。本文以商合杭铁路芜湖长江公铁大桥工程为背景,进行桥塔大体积混凝土冬季施工温控分析研究。首先利用Midas/FEA有限元软件建立塔柱有限元模型,并对塔柱在两种配合比和有无冷却水管条件下的温度场及应力状态进行分析,结果表明,本文中所建立的有限元模型能够准确地预测塔柱在实际浇筑过程中的温度场变化,此研究结果可以为类似混凝土浇筑施工提供参考。As an outstanding representative of modern transportation engineering,the construction process of dual-use bridges for highways and railways integrates complex engineering technologies and strict quality requirements,aiming to meet the dual traffic needs of highways and railways and improve the efficiency of regional interconnection.As the core material in bridge structures,the construction quality of large volume concrete has a crucial impact on the safety and durability of bridges.This article takes the Wuhu Yangtze River Public Railway Bridge project of the Shanghe Hangzhou Railway as the background to conduct temperature control analysis and research on the winter construction of large volume concrete for the bridge tower.Firstly,a finite element model of the tower column was established by using Midas/FEA software,and the temperature field and stress state of the tower column were analyzed under two mix proportions and with or without cooling water pipes.The results showed that the finite element model established in this paper can accurately predict the temperature field changes of the tower column during the actual pouring process.This research result can provide reference for similar concrete pouring construction.

关 键 词：混凝土塔柱 大体积混凝土 水化热 温度场 温度应力 

分 类 号：U445[建筑科学—桥梁与隧道工程]