不同地质边界条件岩溶隧道涌水量预测及展望

Prediction of Water-bursting Volume in Karst Tunnel under Different Geological Boundary Conditions

研究目的:我国目前岩溶隧道涌水量有许多计算方法。虽然方法众多,但对隧道设计要求的正常涌水量及最大涌水量还不能完全满足,仍存在较大误差,有必要深入研究,寻求新的途径。研究方法:根据浅埋岩溶长隧道-南岭隧道涌水量及地表泉的长期观测资料,利用反演推导得出新的方法。研究结果:通过研究得出大泉流量预测法、隧道涌水曲线反演分析法(新均衡法),同时根据长期观测资料得出隧道影响半径(集水范围)、枯水期涌水量、枯水期单位长度富水量、降雨入渗系数等重要水文地质参数及不同季节隧道涌水量比值。研究结论:建议在水文地质参数和涌水量取值方面,转变设计、施工观念;岩溶隧道的修建应贯彻科学发展观进行全面评估。

Research purposes： At present, there are many methods in China of computing the water - bursting volume in karst tunnel. Although there are many methods, but they can not completely meet the tunnel design requirements for computing normal water -bursting volume and max. water -bursting volume with big gaps, so it is necessary to do the researches for the purposes of seeking new way. Research methods：A new method is obtained by surface spring water -bursting volumes in Nanling adopting inversion derivation with long - term observed data about and Tunnel, a long shallow buried karst tunnel. Research results ：The prediction method of big spring flow and curve inversion analysis method （new balance method） of water- bursting in tunnel are obtained through doing researches, and at the same time, many important hydrological and geological parameters and the ratios of water - bursting volumes in tunnel in different seasons are obtained with long -term observed data, including water -collection area, water - bursting volume in dry season, water- enriching volume for one unit length in dry season and the factor of rain penetrating into tunnel. Research conclusions： The design and construction concepts on hydrological and geological parameters and sampling water -bursting volume should be changed, and the construction of karst tunnel should be evaluated with scientific development outlook.