辽宁工程技术大学学报（自然科学版）2026，Vol.45Issue(2)：205-215,11.DOI:10.11956/j.issn.1008-0562.20250456
软土地层盾构侧穿高铁桥墩变形分析
Analysis of deformation of high-speed railway bridge piers subjected to lateral shield tunneling in soft soil layers
摘要
Abstract
To analyze the control effect of the portal isolation structure on ground settlement and the displacement of high-speed railway bridge piers in soft soil layers,as well as the stress state of the isolation structure itself,a three-dimensional model was established based on the Nanjing Metro Line 6 shield side-crossing the Shanghai-Nanjing intercity high-speed railway bridge pier project.The simulated results were compared with the field measured values to verify the reliability of the three-dimensional model.On this basis,the sensitivity of the key parameters of the isolation pile was analyzed and the optimal parameter combination was proposed.The results show that the ground displacement caused by shield tunneling is distributed in a"V"shape,which conforms to the Peck curve.The displacement of the pier exhibits dynamic response characteristics,with its deformation mainly occurring during the stage when the shield enters and exits the affected area.The portal isolation structure has a significant effect on the deformation control of the affected section,which can effectively control the displacement of high-speed railway bridge piers.The thickness of the isolation pile,the depth into the tunnel bottom and the distance from the shield have a significant effect on the control effect of surface settlement and pier displacement.An isolation pile with a thickness of 1.2 m,a depth of 3.0 m into the bottom of the tunnel,and a distance of 1.0 m from the shield is adopted,and a connecting beam with a spacing of 6.0 m is set up,which can ensure the safe operation of the high-speed railway while taking into account the engineering economy.The research conclusions can provide design reference for similar projects of shield side-crossing sensitive structures in soft soil layer.关键词
高铁桥墩/盾构侧穿/门式隔离结构/软土地层/变形控制Key words
high-speed railway bridge piers/lateral shield tunneling/portal isolation structure/soft soil layers/deformation control分类
建筑与水利引用本文复制引用
杨平,曲孟洋,葛玉飞,丁宇浩..软土地层盾构侧穿高铁桥墩变形分析[J].辽宁工程技术大学学报（自然科学版）,2026,45(2):205-215,11.基金项目
国家自然科学基金项目(52178337) （52178337）
