摘要
运用岩土隧道分析有限元软件MIDAS-GTS对广州桂城—南桂路区间地铁建设的围岩稳定性进三维动态施工过程数值模拟研究,探讨了溶洞尺寸、溶洞与隧道间的径距等对围岩稳定性的影响。研究结果表明,溶洞的尺寸以及溶洞与隧道间的径距对围岩的变形、地表沉降量、土层塑性区的分布以及衬砌管片的弯矩分布等有较大影响,而对土层应力分布的影响较小。
Influence of karst scale and the distance between karst scale and tunnel on stability of surrounding rock was studied using finite element analysis software MIDAS - GTS of 3 - D dynamic construction simulation analysis. The resuits show that the karst scale and the distance between karst and tunnel have great influence on the deformation of surrounding rockmasses of tunnel, surface subsidence, the distribution of soil plastic lining and the tablets moment, but have less influence on the stress distribution in the soil.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2008年第2期57-63,共7页
Journal of Railway Science and Engineering
基金
湖南省自然科学基金资助项目(07JJ3104)
福建省教育厅科技计划项目(JA04253)
广州市地下铁道设计院科研项目
关键词
岩溶
城市地铁
围岩稳定性
数值模拟
地表沉降量
karst
subway
stability of surrounding rock
numerical simulation
settlement
