岩溶区双孔隧道开挖稳定性数值分析

Numerical analysis of excavation stability of double-hole tunnel in karst area

随着我国社会经济发展的需要,地下工程项目越来越多,特别是隧道开挖工程。由于我国地形地质条件复杂多样,在开挖前必须对隧道周围地质条件进行分析和评估,减少安全隐患。文章以岩溶区隧道开挖为例,针对在岩溶区开挖隧道会产生的不良效果,通过运用国际上著名的大型岩土工程计算软件FLAC3D,快速分析出溶洞在隧道不同位置时会产生的应力和应变,通过讨论和计算最终得出当岩溶区存在于隧道周围时,应考虑偏压对隧道稳定性的影响,并加强隧道边墙的支护。

With the development of social economy,there are more and more underground engineering projects,especially tunnel excavation.The geological conditions around the tunnel must be analyzed and evaluated before excavation in order to reduce the hidden danger of safety due to the complicated geological conditions in China.Taking tunnel excavation in karst area as an example,in view of the adverse effects of tunnel excavation in the karst area,the stress and strain generated by the caverns in different locations of the tunnel can be quickly analyzed by using the internationally renowned large-scale geotechnical calculation software FLAC3D in this paper.When there is a karst zone on the side wall of the tunnel,the influence of the bias voltage should be taken into account in the design and construction,and the support of the tunnel at the side wall should be strengthened.