基于稳定环境同位素质量平衡模型的隧道涌水来源识别  

Identification of the Water Sources of Tunnel Inflow Based on a Stable Isotopes Mass Balance Model

作　　者：刘建[1] 刘丹[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,成都610031

出　　处：《现代隧道技术》2015年第6期106-110,共5页Modern Tunnelling Technology

基　　金：铁道部科技研究开发计划课题(2010Z001-D)

摘　　要：在对既有三元线性稳定同位素质量平衡模型进行改进的基础上,文章以大气降水、地表水和含水层中的地下水作为隧道涌水的可能来源,以水中δD和δ18O作为质量平衡因子,建立了基于稳定环境同位素质量平衡的隧道涌水来源识别模型。该模型应用于垫邻高速铜锣山隧道,结果表明,铜锣山隧道涌水主要来自含水层中的地下水(50%),其次是大气降水(33%),地表水的贡献率最小,仅为17%。上述研究结论与实际情况基本相符,为该模型在其它隧道应用奠定了基础。Based on modification of the current three-component linear mixing model, a stable isotopes mass balance model is established using the values of deuterium and oxygen-18 in water as balance factors and taking precipitation, surface water as well as groundwater in aquifer as the possible water sources of tunnel inflow. By a case study on Tongluoshan Tunnel on Dianjiang-Linshui expressway, it is found that the groundwater from aquifer is the major source of tunnel inflow, whose contribution rate reaches 50% on average, followed by the precipitation （33%） and surface water （17%）. The deduced conclusions are approximately consistent with the truth, implying that the modified model can be used in other tunnels to identify the probable sources of tunnel inflow.

关 键 词：稳定同位素 质量平衡 隧道涌水 来源识别 优化 

分 类 号：U453.61[建筑科学—桥梁与隧道工程]