摘要
在非对称建筑荷载作用下,采用CRD法和预留核心土弧形导坑法两种施工开挖方案,对小净距隧道的施工过程进行了数值模拟研究。对两种施工方案的洞室周边竖向变形、地中围岩变形和洞室周边的围岩应力进行了对比分析,揭示了非对称建筑荷载作用下两种方案的洞室周边竖向变形规律和变形规律的相似性,获得了地中围岩变形的变化规律,对信息化反馈施工,指出了必须重点监控与关注的位置。
The numerical simulation of neighborhood tunnel is studied in the whole construction process under asymmetric building load,adopting two excavation methods.Contrast on vertical displacement,principle stress of surrouding rocks and subsidence curve of ground is conducted between two excavation methods.The vertical deformation law of surrounding rocks and the comparability of vertical deformation law along the tunnel boundary are revealed.The variation law of subsidence curve of ground is obtained.The key locations of measurement and control are given for the feedback information construction.
出处
《公路工程》
北大核心
2013年第4期34-39,共6页
Highway Engineering
基金
教育部新世纪人才支持项目(.NCET-11-0713)
中央高校基本科研业务费专题项目(SWJTU11ZT33)
创新项目(SWJTU11CX016)
关键词
非对称建筑荷载
小净距隧道
开挖方法
洞周变形
地层沉降
变化规律
asymmetric building load
neighborhood tunnel
excavation method
deformation along the tunnel boundary
subsidence of ground
variation law
