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由于隧道的开挖,使地下水的排泄有了新的通道,破坏了原有的补给循环系统,也加剧了地下水对围岩岩体的作用效果。该文结合江西省景婺黄(常)高速公路新建隧道工程,根据隧道现场的工程地质条件与隧道的设计参数建立模型,利用有限差分软件FLAC3D流固耦合模块对隧道开挖进行研究,分析在饱水状况下隧道开挖过程中渗流场的分布、围岩稳定性以及围岩变形情况,模拟计算结果对于裂隙发育、富水地层隧道稳定性设计、防排水设计与施工具有一定的指导意义。
Due to the excavation of the tunnel, the drainage of groundwater has a new channel, destroying the original supply circulation system and exacerbating the effect of groundwater on the surrounding rock mass. In this paper, a new tunnel project of Jing-Wu-Huang Expressway in Jiangxi Province was established. Based on the engineering geological conditions of the tunnel and the design parameters of the tunnel, a model was established to study the tunnel excavation with finite difference software FLAC3D. The distribution of seepage field, the stability of surrounding rock and the deformation of surrounding rock during tunnel excavation in the condition of saturated water are of guiding significance to the development of fractures, the design of tunnel stability in water-rich stratum and the design and construction of drainage and drainage.