摘要
该文以重庆某隧道工程为依托,对新建平行近接隧道工法选取进行研究。利用有限差分软件对近接隧道施工进行数值模拟分析,研究了全断面法、台阶法与CD法3种基本开挖方法在近接隧道工程中的适应性。研究成果表明:台阶法对于围岩扰动较大,全断面法在控制临近隧道变形方面效果较好,CD法由于闭环早且对围岩扰动小,因此适用性最强。
In the context of proximity tunneling, the excavation of new tunnels may cause disturbance to the ground, resulting in different degrees of deformation and damage to existing tunnels. Through pre-simulation analysis, a full assessment of the possible impact of proximity construction and good control measures are the guarantee of safe construction of proximity tunnels. In this paper, a tunnel project in Chongqing is used as a basis to study the selection of a new parallel proximity tunnel method. Numerical simulations of the construction of the proximity tunnel were carried out using finite difference software, and the suitability of three basic excavation methods, namely the full section method, the step method and the CD method, for the proximity tunneling project was investigated. The results show that the step method is more disturbing to the surrounding rock, the full section method is more effective in controlling the deformation of the adjacent tunnel, and the CD method is the most applicable because it closes the loop early and is less disturbing to the surrounding rock.
作者
霍强
HUO Qiang(China Railway Eleventh Bureau Group Fourth Engineering Company Limited,Wuhan 430062,China)
出处
《广东水利水电》
2023年第1期43-47,共5页
Guangdong Water Resources and Hydropower
关键词
近接隧道
开挖工法
围岩变形
衬砌受力
proximity tunnel
excavation method
surrounding rock deformation
lining force
