【作者】 孟春晓；

【导师】 黄涛；

【作者基本信息】 西南交通大学 ， 市政工程， 2011， 硕士

【摘要】 由于工程环境的特殊性和可能发生涌水灾害的严重性,水下隧道也成了种高风险的地下工程。因此,开挖前对隧道研究区可能发生的灾害进行分析预测,是保障隧道安全施工和正常运营的关键。目前,隧道涌水预测的主要方法是对隧道场区的动态地下水流场进行模拟。而实现这一目的前提则是建立起科学、合理、准确的水文地质概念模型。本文以狮子洋水下隧道为例,通过收集该隧道场区的地质、水文地质等资料,对其水文地质条件进行概化,并分析了隧道所在区域边界条件、含水层的源汇项及渗透系数等。文章得到了以下研究结论：(1)分析了影响水文地质单元划分的因素,筛选了地层岩性、地质构造、地形地貌、渗透系数、水位、隧道埋深等六个评价指标；(2)采用层次分析-模糊综合的数学方法,建立了隧道水文地质单元划分的判别模型；(3)将研究区分成了DIK33+660～DIK34+710.DIK34+710～DIK38+520、DIK38+520～950、DIK38+950～DIK39+940、DIK39+940～DIK42+260、DIK42+260～DIK43+000六段,从而分段建立起隧道的水文地质概念模型。本文为建立准确、科学的狮子洋水下洋隧道水文地质概念模型提供了依据,也对其他水文地质概念模型的建立有理论参考价值和指导意义。更多还原

【Abstract】 As the specific characteristics of engineering environmental and the severity of potential groundwater inflow disaster, underwater tunnels have become to be high-risk underground projects. Therefore, predicting the possible disasters in the tunnel area before excavation becomes important to the security of tunnel construction and normal operation. So far, the general method for prediction of tunnel inflow is to simulate the dynamic groundwater flow field within the tunnel area. And the precondition to realize this step is to set up a scientific, reasonable and accurate hydrogeological conceptual model of the study area.This thesis took the Shiziyang Underwater Tunnel for example. By collecting the geological and hydrological data from the tunnel area, this thesis conceptualized the hydrogeological conditions of the tunnel and analyzed the parameters like boundary conditions, sources and sinks, permeability of the aquifers. The thesis has such research results:(1) An evaluation index system was established by inferring the factors that could impact the division of hydrogeological units, including the strata lithology, geological structure, geographic and geomorphic conditions, permeability, water table and the embedded depths of tunnel.(2) By using the AHP-fuzzy comprehensive method, we set up a discriminative model for the division of hydrogeological units.(3) Then the Shiziyang Tunnel was divided into 6 sections by this model and the hydrogeological conceptual model was set up for each tunnel division. These 6 divisions were DIK33+660～DIK34+710, DIK34+710～DIK38+520, DIK38+520～950, DIK38+950～DIK39+940, DIK39+940～DIK42+260 and DIK42+260 DIK43+000.This thesis proposed a way of establishing scientific and accurate hydrogeological conceptual model for Shiziyang Underwater Tunnel, and also has provided a theoretical reference and the guiding sense for other underwater tunnels.更多还原