摘要
依据深圳彩田路北延段工程新彩隧道北口段(拟建)近距离上跨厦深铁路梅林隧道两条隧道叠置的工程设计实例,运用有限元分析软件MIDAS-GTS进行三维模型数值分析,对比明挖暗埋法和暗挖法新建隧道施工时既有隧道的变形及内力变化规律,对既有隧道的安全性进行评价.结果表明:明挖方案与暗挖方案从技术安全角度皆可行,经过综合比较,推荐明挖隧道方案.将数值分析结果与工程实例相结合,提出了新建隧道与既有隧道之间中隔岩体的加固措施、临时边坡开挖时锚喷网的设计方案及施工过程中新建隧道及既有隧道的监控量测方案.
Relying on engineering design examples,and by means of finite element analysis software MIDAS-GTS,deformation,internal stress and safety evaluation of existing tunnel are studied in condition of the two engineering programme,open surface buried method and subsurface excavation method.The results indicate that both of the open surface and subsurface excavation programme can be ok from the technical safety.But in comprehensive comparison,the open surface programme is recommended.Combining the results of numerical analysis with the engineering instance,reinforcement measures of the rock between the new tunnel and existing tunnels,design project of shotcrete rockbolt mesh during temporary slope excavation and monitoring program of new tunnels and existing tunnel in the process of construction are brought up.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2013年第1期40-45,共6页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
关键词
隧道工程
交叠隧道
数值模拟
明挖暗埋法
暗挖法
tunnel engineering
overlap tunnels
numerical simulation
open surface buried method
subsurface excavation method
