摘要
近年来双线平行隧道以其高灵活性和施工的简易性逐渐成为地铁隧道开挖的常见形式,对双线平行隧道开挖所造成的地表沉降也越发引起人们的注意。北京轨道交通7号线九龙山—大郊亭区间采用双线隧道正台阶开挖,穿越北京地区特定的砂性土、粘性土互层的地质条件。运用MIDAS/GTS软件,在简化地质模型的基础上,利用软件模拟反演得到地层参数。选取典型的隧道区间,利用数值模拟软件对相同隧道间距情况下不同掌子面距离对地表沉降造成的影响进行分析,得出相应的规律,可为日后北京地区地铁施工提供依据和指导。
The parallel tunnels with their high flexibility gradually have become the common forms of the subway construction. Beijing Metro Line 7 Jiulongshan-Dajiaoting interval with double line tunnel positive step excavation, through Beijing area specific sand soil, cohesive soil inter-bedded geologic conditions. Using MIDAS/GTS software, based on the simplified geological model, to simulate the inversion parameters and to analysis the surface subsidence on the different tunnel spacing and the different distance of the tunnel, obtained the corresponding rules, provide the guidance for the construction of the project.
出处
《西部探矿工程》
CAS
2016年第9期187-191,共5页
West-China Exploration Engineering
关键词
平行隧道
数值模拟
左右线掌子面距离
隧道间距
地表沉降
parallel tunnel
numerical simulation
distance between left and right tunnel faces
distance between tunnels
surface subsidence
