摘要
同联多T构转体就位后合龙口两侧不可避免地出现竖向误差,该类误差调整困难,存在调整后仍不满足规范要求的情况。以重庆市快速路二横线5桥同转项目为依托,研究在施工线形控制误差下,T构转体后利用球铰转动进行姿态调整后合龙口误差满足规范要求的概率,并基于遗传算法提出了合龙口误差调整的计算方法。结果表明:推导的转体合龙状态数学模型对于同联多T构转体桥具有良好的适应性,可较好地预测同联多T构转体桥合龙口高差满足规范要求的概率;基于遗传算法的合龙口误差调整模型可快速得到同联多T构合龙口竖向高差调整的最优方案。
The unite of multi-T structure swivel bridge inevitably has vertical errors on the both sides of the closure after the bridge is rotated in place.It is difficult to adjust the closure error,and it still can not meet the specification requirements after adjustment.Based on the simultaneous swivel project of five bridges on the second horizontal line of Chongqing expressway,the probability that the closure error meets the specification requirements after the posture adjustment by using the ball joint rotation after the rotation of T-structure under the construction alignment control error was studied,and the calculation method of closure error adjustment was proposed based on genetic algorithm.The results show that the derived mathematical model of swivel closure state has good adaptability to the unit of multi-T structure swivel bridge,and can better predict the probability that the closure height difference of unit of multi-T structure swivel bridge meets the specification requirements.The closure error adjustment model based on genetic algorithm can quickly obtain the optimal adjustment scheme of closure vertical height difference of multi-T structure.
作者
干昌洪
梁昆
许明奎
曹喜良
张文学
冯维宁
GAN Changhong;LIANG Kun;XU Mingkui;CAO Xiliang;ZHANG Wenxue;FENG Weining(China Construction Tunnel Construction Co.Ltd.,Chongqing 404100,China;School of Architecture and Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《铁道建筑》
北大核心
2021年第10期53-56,116,共5页
Railway Engineering
关键词
转体桥
同联多T构
遗传算法
线形误差
合龙口误差
姿态调整
swivel bridge
unit of multi-T structure
genetic algorithm
alignment error
closure error
posture adjustment
