红层隧道涌水流量衰减曲线特征分析——以雅康公路飞仙关隧道为例

岩溶隧道涌水在隧道建设过程中较为常见,但在红层隧道中鲜有先例。以雅康公路飞仙关隧道为例,基于泉流量衰减方程,将地质条件加以概化,拟合预测曲线,并与隧道涌水流量衰减实测曲线进行对比分析,采用"先拟合,后预测,再比较"的方法,分析了方程的适用性。结果显示,实测曲线与预测曲线相契合,表明方程选取适当,并且侧面佐证了隧道涌水的来源预测结果。

Analysis of tunnel water gushing attenuation curve characteristics in red bed: case of Feixianguan Tunnel on Yakang Highway

Water gushing often occurs in karst tunnels during the process of tunnel construction, but there are few precedents in red bed tunnel. Taking Feixianguan Tunnel on Yakang Highway as an example, the prediction curve was fitted based on analyzing the applicability of spring discharge attenuation equation and generalizing the geological conditions. The fitted curve was compared with the measured tunnel inrush flow attenuation curve. The method of “fitting-prediction-comparison” reveals that the measured curve corresponds well with the prediction curve, which proves that the selected equation is suitable and confirms the predicted water gushing source.