论文部分内容阅读
转体施工连续刚构桥在跨铁路桥型中具有施工干扰小、工期短的突出优点,其在中国应用日益广泛。桥梁转体施工时,上部结构及主墩自重全部由球铰传递至墩底承台,承台受力状态与成桥阶段差异显著。该文结合武汉市长丰大道跨汉宜铁路、汉丹铁路转体施工连续刚构桥群桩基础设计,建立承台-桩-土整体分析模型,分析转体球铰集中荷载作用下群桩基础的受力性能。结果表明:考虑桩-土接触的数值分析方法模拟球铰集中荷载作用下群桩基础荷载传递机理是可行的,并据此验证了承台结构设计的合理性。
Swivel construction of continuous rigid frame bridge in the railway bridge with the construction of small interference, short duration of the outstanding advantages of its increasingly widespread use in China. During the construction of the bridge, the self-weights of the superstructure and the main pier are all transferred from the ball joints to the pier caps, and there is significant difference between the bearing state and the bridge completion stage. Based on the design of the continuous rigid frame bridge group pile foundation constructed by swivel construction of Han-Yixing Railway and Han-Dan Railway in Wuhan Changfeng Avenue, the whole pile-soil-pile analysis model is established and the pile foundation under the concentrated load of swivel ball joints is analyzed The force performance. The results show that it is feasible to consider the pile-soil contact numerical simulation method to simulate the load transfer mechanism of pile foundation under the concentrated load of spherical joints, and verify the rationality of the structure design of the pile cap.