顶管隧道穿越独墩单桩人行天桥施工影响研究

STUDY ON CONSTRUCTION INFLUENCE OF PIPE JACKING TUNNEL CROSSING SINGLE COLUMN PIER PEDESTRIAN OVERCROSSING

独墩单桩人行天桥抗侧向变形能力差,大直径顶管隧道穿越独墩单桩人行天桥施工过程中,土体卸荷产出偏心荷载,会对其产生较大影响。在分析独墩单桩人行天桥变形控制标准的基础上,应用数值模拟方法,深入研究了大直径顶管隧道施工过程中,桥体结构的应力和变形特征,并与其变形控制标准进行了对比分析。

The single column pier pedestrian overcrossing has poor resistance to lateral deformation.during the construction of the large diameter pipe jacking tunnel passing through the single column pier pedestrian overcrossing,the soil unloads and produces eccentric loads,which will have a greater impact on it.Based on the analysis of the deformation control standard of single column pier pedestrian overcrossing,the stress and deformation characteristics of the bridge structure in the construction process of large diameter pipe jacking tunnel are studied by numerical simulation method.