铁道标准设计2018，Vol.62Issue(7)：109-114,6.DOI:10.13238/j.issn.1004-2954.201708060002
京沈客专朝阳隧道下穿既有锦赤铁路桥梁施工安全性数值分析
A Numerical Analysis of Construction Safety of Chaoyang Tunnel under Existing Railway Bridge on Beijing-Shenyang High Speed Railway
陈宇1
作者信息
- 1. 中国铁路设计集团有限公司,天津 300251
- 折叠
摘要
Abstract
Based on the engineering project of the Chaoyang tunnel on the newly-built Beijing-Shenyang dedicated passenger line passing under the existing Huojia extra-long bridge on Jinzhou-Chifeng Railway,the influence of excavation with new tunnel mining method on the deformation and displacement of the existing bridge is analyzed by finite element numerical simulation software.The results of calculation and analysis show that during the construction of the tunnel passing under No.4 and No.5 piers,the soil and the pier structure are greatly deformed.By taking a series of measures such as isolation protection,grouting and water shutoff,and advanced support,the displacements caused subsequently following tunnel excavation step are less than 5 mm of the early warning value.This indicates that the engineering measures taken in the construction are feasible and could provide theoretical basis and experience for practical construction.关键词
高速铁路/隧道/下穿/铁路桥梁/变形和位移/施工安全性Key words
High speed railway/Tunnel/Passing under/Railway bridge/Deformation and displacement/Construction safety分类
交通工程引用本文复制引用
陈宇..京沈客专朝阳隧道下穿既有锦赤铁路桥梁施工安全性数值分析[J].铁道标准设计,2018,62(7):109-114,6.
