基于检测及数值计算的运营岩溶隧道涌水综合处治研究

Study on Comprehensive Treatment of Water Inrush in Operating Karst Tunnel Based on Detection and Numerical Calculation

涌水是运营岩溶隧道的常见病害。重庆某运营隧道岩溶段涌水病害反复出现,虽然采用了多种常规病害处治手段,但效果均不佳,严重威胁了隧道的运行稳定和行车安全。为了根治岩溶隧道运营期突涌水问题,利用多种隧道病害检测方法(包括地质雷达、外观、二次衬砌净空断面、数值模拟等)进行综合检测,结合实际隧道病害部位和破损程度,演算出了不同水压作用下的衬砌结构安全系数,得到了隧道衬砌结构的安全性和稳定性情况,并通过采用主洞内粘贴钢带加固+增设泄水洞相结合的方法进行了涌水隧道综合治理。

Water inrush is a common disease in operating karst tunnel.The water inrush disease of a karst tunnel oc-curs repeatedly in Chongqing.The conventional treatment methods of various operating tunnels are ineffective,which seriously threatens the stability and traffic safety of the tunnel.In order to solve the problem of water inrush in karst tunnel during operation period,a variety of tunnel disease detection methods(including geological radar,ap-pearance,secondary lining clearance section,numerical simulation,etc.)were applied to comprehensive detection.Combined with the actual tunnel disease position and damage degree,the safety factor of lining structure under dif-ferent water pressure was calculated,and the safety and stability of tunnel lining structure were obtained.The com-prehensive treatment of water inrush tunnel is carried out by the method of pasting stel strip reinforcement in the main tunnel and adding drainage tunnels.