摘要
为了提高大斜度高塔在单塔悬臂施工过程中的稳定性和安全性,需要合理设计主动临时横撑结构,用来消除上下塔柱连接部因混凝土水平力产生的拉应力。本文以永宁黄河公路大桥主塔施工为背景,通过建立模型对施工阶段进行模拟计算后提出横撑的设计方案;对横撑施工过程的质量安全控制进行全面阐述;塔柱施工过程中的施工监控以应力监测为主、变形控制为辅以确定主动横撑的顶推力;根据工程进展及监控数据,在保证安全的前提下逐步进行横撑拆除。
In order to improve the stability and safety of the large inclined tower during the cantilever construction of a single tower, it is necessary to reasonably design an active temporary horizontal support structure to eliminate the tensile stress caused by the horizontal force of the upper and lower column connection. Taking the construction of the main tower of the Yellow River Highway Bridge in Yongning as the background, the author put forward the design scheme of the transverse support after the simulation calculation of the construction stage by establishing a model, and comprehensively expounded the quality and safety control of the construction. Construction monitoring during the construction of the tower column was mainly based on stress monitoring and deformation control. The top thrust of the active transverse support was determined. According to the progress of the project and monitoring data, the transverse support was gradually dismantled under the premise of ensuring safety.
作者
安德柱
An Dezhu(China Railway 16th Bureau Group Co. Ltd., Tangshan Hebei 064000, China)
出处
《铁道建筑技术》
2019年第7期40-43,60,共5页
Railway Construction Technology
基金
中铁十六局集团公司新技术开发研究项目(K2014-5B)
中国铁建股份有限公司科技开发研究项目(14-C17)
关键词
主动横撑
结构计算
应力监测
施工控制
active transverse support
structural calculation
stress monitoring
construction control
