【作者】 陈伟君；

【导师】 邓荣贵；

【作者基本信息】 西南交通大学 ， 岩土工程， 2009， 硕士

【摘要】 隧道作为地下线性建筑物,修建过程中不可避免地穿越不同水文地质体。涌水是隧道施工中常见的地质灾害,同时也是其它地质灾害的主要诱因之一,其会造成开挖时的突水、突泥、翻浆冒泥等等,后果严重,危害巨大,故对隧道工程的地下水涌水量预测研究具有重大意义。本文以雅安至泸沽高速公路大相岭泥巴山隧道为研究对象,以地质分析原理及水文地质分析原理为基础,运用工程地质、水文地质、数值模拟等理论和方法,深入研究了隧址区区域地质环境特征和水文地质环境特征,并预测了隧道及断层涌水量。通过研究,本文主要得到了以下几个方面的结论:1、通过现场勘察和资料收集,隧址区地处四川盆地亚热带季风湿润气候与青藏高原大陆性干冷气候,雨量充沛,为隧道涌水提供了充分条件。隧址区共有16条断层发育,断层裂隙发育,为隧址区内地下水赋存提供了有利条件。2、通过对隧址区的水文地质结构特征及地下水类型分析表明,构造裂隙带为主要的含水体,完整的火山岩段为主要隔水体;隧址区地下水类型主要有第四系松散岩类孔隙水、裂隙水和碳酸盐岩岩溶裂隙水。裂隙水是隧道涌水的主要源头,主要赋存于隧址区的断层和破碎带中。3、通过采用大气降水入渗法、地下水径流模数法及地下水动力学法对泥巴山隧道涌水量理论计算预测结果的分析表明,隧道最大涌水量介于29000～38000m~3/d,正常涌水量介于21500～25000m~3/d。4、通过采用3D-FLOW数值软件对大相岭泥巴山隧道涌水量进行了模拟计算,并对不同模拟状态下隧道的整体涌水量、断层涌水量进行了分析。隧道整体涌水量为21383～41366m~3/d之间,并推测在隧道的主要断层发育处,隧道极易发生涌水的可能。因此在这有断层的区段施工时需注意加以防范,提前采取措施。更多还原

【Abstract】 As a kind of underground lineament building, the tunnel inevitably will pass through different hydrology geology in construction process. Waterinflow is a common geological disaster and the main inducement cause of other geological disasters.it will cause percolating water, emerge flooding ,inrush putty and other disasters in tunnel excavation. The consequence of tunnel disaster is serious,so it is significant of estimating on the waterinflow amount of the tunnel project.Based on the geological analysis principle and the hydrological geology analysis principle, the thesis apply the engineering geology, hydrological geology and numerical simulation theories and measures to the study of the Niba mountain tunnel of YAAN-LUGU highway,and forecast the waterinflow amount of the tunnel and fault.In the course of studying,the thesis draws some conclusions:1.Through on-site investigation and data-collected,the tunnel locates in Sichuan basin subtropical monsoon climate and the qinghai-tibet plateau continental dry climate. The abundant precipitation provide sufficient condition for the water-gushing in the tunnel. There is 16 faults in the tunnel zone,so it is the favorable condition for the existence of groundwater in the tunnel zone by the fracture,which grow in the faults.2.By analysis of the hydrological geology structural features and groundwater types in the tunnel zone,it indicates that the structral fracture zone is the main hydrous body,the intact lava segment is the main water-proof body; the groundwater types are mainly constituted by Q₄ loose rock fissure water, fissure water and carbonatite karst fissure water. Fissure water is the main source of waterinflow in the tunnel,it mainly exists in the fault and fractured area.3.The theoretical calculation of the Niba mountain tunnel waterinflow amount is calculated by atmospheric precipitation infiltration method, groundwater runoff module method and groundwater dynanmics method,.the result indicates that the maximum waterinflow amount of the tunnel is between 29000 to 38000m³/d,the normal waterinflow amount is between 21500 to 25000m³/d.4.The waterinflow amount of the Niba mountain tunnel is computed simulativily by using 3D-FLOW numerical software, and then we analyse the waterinflow amount of the whole tunnel and fractures under the different simulated conditions. The waterinflow amount of the whole tunnel 21383～41366m³/d.we speculate,it is possible to occur the wateburst accident in the main fault of the tunnel ,we should take measures to prevent water-gushing in advance when we work in the fractured zone.更多还原