地铁矿山法区间隧道下穿大型市政排水箱涵影响分析

Analysis on Influence of Tunnel Construction Under the Large Drainage Box Culvert

以徐州地铁3号线某矿山法区间隧道下穿解放南路大型市政排水箱涵为依托,根据拟定的设计方案,采用MIDAS/GTS有限元软件建立了隧道-土-市政排水箱涵相互作用的三维非线性有限元计算模型,通过合理的简化和假设,变化各种参数,采用有限差分法分析了地铁矿山法区间隧道掘进过程中排水箱涵的变形及地表变形,来研究隧道开挖对其上部排水箱涵的扰动响应机理,对工程设计及后续施工具有一定的借鉴和指导意义。

In this article,the influence of the construction of the mining tunnel of No. 3 line of Xuzhou metro on the existing overcrossing drainage box culvert of Jiefangnanlu is numerically simulated by means of MIDAS / GTS finite element software. According to the proposed design scheme,through the reasonable simplification and assumptions,changing some parameters,the finite difference method is used to analyses the deformation of the drainage box culvert and the ground surface by the excavation process of the tunnel,in order to study the influence and discipline of the upper drainage box culvert caused by tunnel excavation. It has a certain reference and guidance for engineering design and construction.