隧道开挖位置对边坡稳定性的影响研究  

Influence of Tunnel Excavation on the Slope Stability

作　　者：刘志伟[1] 

机构地区：[1]国网福建省电力有限公司经济技术研究院,福州350012

出　　处：《土工基础》2014年第5期79-82,共4页Soil Engineering and Foundation

摘　　要：在有限元程序的基础上,建立了边坡隧道平面应变数值模型,对比分析了隧道不同开挖位置对边坡稳定性的影响。研究表明:隧道在边坡上部开挖,其扰动对隧道本身以及边坡影响不大,当隧道开挖至边坡中部,边坡出现明显位移变化。随着隧道开挖位置向坡底移动,对边坡以及隧道周边土体迅速产生较大扰动,甚至产生破坏。由此,确定隧道开挖位置的合理范围,为此类隧道建设提供了定性或定量分析结果,使实际工程设计更加合理。The tunnel within a slope is modeled by two-dimensional finite element method.The impact of different excavation locations on the slope stability was compared on the analytical model.The results indicate that,the stability of the slope has very minor impact when the excavation is performed at the top of the slope,but this has little practical applications.When the tunnel is excavated to the middle of the slope,an obvious deformation on the slope can be found.A significant disturbance on the slope soils even failures can be resulted when the excavation is approaching to the bottom of the slope.An optimized tunnel excavation zone can be determined throughout the numerical analysis and the result can provide guidance to the tunnel design and constructions.

关 键 词：边坡 隧道 开挖位置 位移 数值模拟 

分 类 号：P642[天文地球—工程地质学]