摘要
断层等软弱结构面是隧道工程中最常见的一类规模较大的地质不连续面。诸多工程实践和研究表明,隧道围岩的变形与破坏大多受到断层等软弱结构面的控制。结合大华岭隧道施工过程,根据隧址区断层实际走向、断层面产状与隧道轴线不同夹角,利用基于有限元方法的岩土与隧道分析系统(MIDAS/GTS)对断层影响下的隧道围岩稳定性进行数值模拟分析,以DX(V)位移等值线数据分析为例,分析了特定施工段支护前后沉降对比及位移量,讨论了围岩和支护体系的结构状态及工程效果。该方法可为同类隧道设计、施工和研究提供有益借鉴。
Weak structural planes such as fault crush belts are typical defective geological discontinuity plane, which are often encountered and must be solved effectively in tunnel engineering. Many corresponding cases and studies show that the deformation and failure of tunnel surrounding rock are mainly controlled by weak structural planes, while the mechanism of this control is still an ambiguous question. According to the fault crush belts＇ actual trend, occurrence and the cave tunnel axis＇ different included angle of the Dahualing Cave Tunnel, surrounding rock stability of cave tunnel affected by the fault crush belts is numerically analyzed by using the software MIDAS/GTS based on finite element method. In combination with the displacement contour lines of DX（V）, the contrast of sedimentation and the displacement of certain construction site are analyzed before and after the support. The structure condition and the effect of engineering of the surrounding rock and support are discussed. This analysis method and conclusion can provide the reference for the design, construction and research of similar tunnels.
出处
《公路》
北大核心
2011年第9期242-245,共4页
Highway
关键词
隧道工程
断层
围岩稳定
数值分析
tunnel engineering
fault crush belts
surrounding rock stability
numerical analysis
