大断面黄土隧道三岔口区域前期变形分析及开挖优化  

Early Deformation Analysis and Excavation Optimization of Junction Sections of Large Cross-section Loess Tunnels

作　　者：王玥[1] 史继尧[1] 

机构地区：[1]中铁隧道集团有限公司技术中心,河南洛阳471009

出　　处：《隧道建设》2015年第1期83-88,共6页Tunnel Construction

摘　　要：为提高大断面黄土隧道关键部位的施工安全,通过监测数据分析,总结宝兰客专14标多个三岔口的变形规律,指出主隧道中台阶开挖和仰拱浇筑分别是变形发展和变形控制的关键时期,由此预测了古城岭隧道3#斜井三岔口的最大变形,并优化了开挖方法,最终较好地控制了变形。The regularity of the deformation of the junction sections of tunnels in No.14 bid section of Baoji-Lanzhou passenger dedicated line is studied on basis of the monitoring results,so as to improve the construction safety of critical positions of large cross-section loess tunnels.It is concluded that the intermediate bench excavation and the invert casting are critical points in terms of deformation development and deformation control.Furthermore,the maximum deformation of the junction section of No.3 inclined shaft of Guchengling tunnel is predicted on basis of the study results,and the excavation method is optimized accordingly.In the end,the deformation of the mentioned junction section has been well controlled.

关 键 词：大断面黄土隧道 宝兰客运专线 监测 三岔口 前期变形 开挖优化 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]