双隧道开挖有限元模拟

Finite Element Simulation of Twin Tunnel Excavation

摘要: 隧道开挖将不可避免地对其邻近建筑物产生影响，利用有限元COMSOL软件建立双连拱隧道的二维模型，通过建立空间有限元模型，对双隧道开挖的空间效应的变形和稳定性进行了分析。需考虑两个隧道之间的稳定性，确保隧道施工的安全。通过对应力应变以及内力的变化规律分析，了解开挖过程采用的结构以及开挖方式的安全性及可靠性，从而提高施工的安全性，分析后给出了土体开挖前后的应力云图、塑性区示意图。为控制地表沉降、保护地面建筑物和确定隧道衬砌或支护方案提供了重要的参考依据，研究结果为双隧道的设计和施工提供了很好的参考价值。

Abstract: Tunnel excavation will inevitably have an impact on adjacent buildings. A two-dimensional model of a double arch tunnel was established using the finite element COMSOL software. By establishing a spatial finite element model, the deformation and stability of the spatial effect of double tunnel ex-cavation were analyzed. It is necessary to consider the stability between two tunnels to ensure the safety of tunnel construction. By analyzing the changes in stress, strain, and internal force, we aim to understand the safety and reliability of the structure and excavation method used during the excavation process, in order to improve the safety of construction. After analysis, we provide stress cloud maps and plastic zone diagrams of the soil before and after excavation. This provides an im-portant reference basis for controlling surface settlement, protecting ground buildings, and deter-mining tunnel lining or support plans. The research results provide good reference value for the design and construction of double tunnels.