摘要
城市轨道交通的大规模兴建,不可避免地导致了各类近接工程的出现,给实际施工带来了极大挑战。文章依托长沙地铁1号线涂家冲站—铁道学院站区间隧道下穿京广铁路工程,对盾构下穿既有运营铁路的施工控制深入开展了研究,提出了包括旋喷桩加固、线路架空加固(横挑纵抬)等针对性的施工控制方案,并进行了数值模拟计算分析。结果表明,在上述控制措施的保护下,既有运营铁路路基与铁轨的变形值均能够满足铁路安全运营的要求,所提出的控制措施是有效可靠的,可供类似工程参考。
With the large-scale construction of urban rail transit, it's very common to approach various types of construction works, which poses great construction challenges. A study on the construction control of shield tunneling beneath an existing railway is conducted based on the running tunnel from Tujiachong station to Tiedaoxueyuan sta- tion of Changsha Metro Line I. Construction control programs such as rotary pile reinforcement and overhead line re- inforcement (longitudinal lifting of the existing railroad using cantilevers of I-beams) are proposed, and a numerical simulation is carried out. The results indicate that the deformations of the subgrade and existing railroads can meet the requirements of railway operation safety when the above construction control measures are used and that the pro- posed control measures are effective and reliable.
作者
李军
雷明锋
林大涌
LI Jun;LEI Mingfeng;LIN Dayong(Tianjin Construction Engineering Co. Ltd. of the China Railway First Engineering Group, Tianjin 300250;School of Civil Engineering, Central South University, Changsha 410075)
出处
《现代隧道技术》
EI
CSCD
北大核心
2018年第2期174-179,共6页
Modern Tunnelling Technology
基金
国家自然科学基金项目(51508575)
中国博士后科学基金项目(2016T90764)
湖南省创新平台与科技人才项目(2015RS4006)
关键词
盾构隧道
运营铁路
下穿施工
控制技术
数值计算
Shield tunnel
Operational railway
Construction underneath existing railway
Control technology
Nu- merical simulation