东山供水工程隧洞穿公路段稳定研究

Stability Research on the Tunnel-highway Intersection of Dongshan Water Supply Project

东山工程9#隧洞与和汾高速公路交叉,交叉段围岩情况不良,地下水位较高,文中运用土力学理论初算公路与隧洞的相互作用,并在地质工作基础上,建立有限元模型进行计算,考虑隧洞喷锚支护,得出计算结果:在隧洞深埋的情况下,公路与隧洞相互影响较小,印证了初算结论。为保证隧洞开挖安全进行,根据计算结果,给出具体开挖支护建议。

No.9 tunnel of the Dongshan Water Supply Project intersects with the Hefen Highway. Surrounding rock condition of the intersection is poor,and the groundwater level is high. In this paper,the interaction between the highway and the tunnel was calculated by using the soil mechanics theory preliminary. Based on the geological works,a FEM model was established considering combined bolting and shotcrete of the tunnel to calculate the effect of tunnel on highway. The results show that the effect of tunnel on highway can be ignored when the tunnel is deeply buried,which confirms the early conclusion. To ensure the safety of tunnel excavation,some supporting suggestions are proposed according to the results.