摘要
依托福州滨海快线火车站上跨既有线联络通道工程,基于ABAQUS建立管幕预支护下箱涵顶进数值模型,结合现场实测数据,研究既有线竖向位移和地表沉降的发展规律。结果表明:既有线受上方开挖卸载效应影响逐渐隆起,竖向位移曲线呈近似抛物线状,主要隆起增量发生在穿越阶段;地表横向沉降曲线呈槽状分布,纵向沉降曲线随箱涵顶进由V形向U形演变;现场实测数据与数值模拟较为吻合,但既有线竖向位移峰值较数值模拟略小10%。
Based on the connection passage works of Fuzhou Binhai Express Railway Station across the existing line,ABAQUS is employed to establish a numerical model of box culvert jacking under pipe roof pre-support.Combined with the field measured data,this paper studied the development law of vertical displacement and surface subsidence of the existing line.The result shows that,the existing line is gradually uplifted under the influence of the excavation unloading effect above,with the vertical displacement curve being approximately parabolic and the main uplift increment occurred in the crossing stage.The transverse settlement curve of the ground surface is distributed in a groove shape,and the longitudinal settlement curve evolves from V-shaped to U-shaped with the jacking of the box culvert.The field measured data are in good coincidence with the numerical simulation,but the peak vertical displacement of the existing line is slightly 10%smaller than that of the numerical simulation.
作者
陈思明
罗嵩
白伟
谢轶轲
CHEN Siming;LUO Song;BAI Wei;XIE Yike(China Railway South Investment Group Co.,Ltd.,Shenzhen 518052,Guangdong,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China)
出处
《路基工程》
2025年第3期188-193,共6页
Subgrade Engineering
基金
福建省住建厅科技研究开发计划项目(2022-K-222)。
关键词
复杂地质
管幕箱涵法
上跨既有线
监控量测
微扰动
位移控制
安全性
complex geology
pipe roof culvert box advancing method
crossing the existing line on the top
monitoring measurement
micro-disturbance
displacement control
safety
