超宽桥面部分斜拉桥主梁线形控制分析

胡永

铁道工程学报 ›› 2007, Vol. 24 ›› Issue (9) : 34-39.

PDF(564 KB)
PDF(564 KB)
铁道工程学报 ›› 2007, Vol. 24 ›› Issue (9) : 34-39.
路网研究

超宽桥面部分斜拉桥主梁线形控制分析

  • 胡永
作者信息 +

Analysis of Linear Control of Main Beam of Partial Cable-stayed Bridge with Super Wide Deck

  • HU Yong
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文章历史 +

摘要

研究目的:为较好地控制超宽桥面的线形,研究超宽桥面部分斜拉桥主梁线形控制系统,分析影响主梁 挠度变化的因素及全桥合龙后高程理论值与实测值存在偏差的原因,取得现场实测数据以修正计算模型 参数。
研究方法:以基于最小二乘法的误差控制理论为基础,结合柳州三门江大桥施工特点,运用有限元分析软 件建立线形控制模型,通过实测数据与理论计算结果确保桥梁线形施工质量。
研究结论:超宽桥面部分斜拉桥主梁结构变位及高程变化特点与预应力混凝土连续箱梁相接近;采用现 场实测数据修正计算模型参数,达到理论计算模型与实桥相吻合,保证了主梁的安全施工;施工中要实时监测 挂篮变形,并根据梁段重量对预抬量进行适当调整。

Abstract

Research purposes :For the purpose of better linear control of super wide deck , the researches are done on the linear control system for main beam of partial cable-stayed bridge with super wide deck, the analyses are made for the influencing factors of deflection change and the causes for the difference in elevation between theoretic values and tested values after bridge closure , and the parameters of calculation model are modified with the tested data.
Research methods :On the basis of the error control theory based on the least bi-multiplication and the construction characteristics of Sanmenjiang Bridge in Liuzhou,the linear control model is established with the software of finite- element analysis to ensure the construction quality by using the tested data and results of theoretic calculation.
Research conclusions: The aracteristics of the deflection and change in elevation of main beam structure of partial cable-stayed bridge with super wide deck are close to the stressed concrete continuous box beam. Using the tested data to modify the parameters of calculation model, a perfect match is achieved between theoretic calculation and the real situation of the bridge,which ensures the safe construction of main beam. In the construction , it is necessary to monitor the distortion in real time and adjust the pre-elevation volume according to the weights of the section.

关键词

超宽桥面 / 部分斜拉桥 / 线形控制 / 桥梁观测

Key words

super wide deck / partial cable-stayed bridge / linear control / bridge observation

引用本文

导出引用
胡永. 超宽桥面部分斜拉桥主梁线形控制分析[J]. 铁道工程学报, 2007, 24(9): 34-39
HU Yong. Analysis of Linear Control of Main Beam of Partial Cable-stayed Bridge with Super Wide Deck[J]. Journal of Railway Engineering Society, 2007, 24(9): 34-39
中图分类号: U448.27    U445.1   

参考文献

[1]武芳文,薛成凤,赵雷.连续刚构桥梁悬臂施工线形控制 分析[J].铁道工程学报,2006(4):29-32.
[2]徐君兰.大跨度桥梁施工控制[M].北京:人民交通出版 社,2000.
[3]向中富.桥梁施工控制技术[M].北京:人民交通出版 社,2003.
[4]葛耀君.分段施工桥梁分析与控制[M].北京:人民交通 出版社,2003.
[5]雷俊卿.桥梁悬臂施工与设计[M].北京:人民交通出版 社,1999.

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