穿越富水断层深埋引水隧洞涌水量预测研究  

On the prediction of water inflow in deep buried diversiontunnel through water-rich fault

作　　者：朱彬彬 董道军[1,2] 吴立 吴义[3] 郝勇 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]岩土钻掘与防护教育部工程研究中心,湖北武汉430074 [3]浙江省第七地质大队,浙江杭州310000

出　　处：《铁道科学与工程学报》2017年第11期2407-2417,共11页Journal of Railway Science and Engineering

基　　金：国家自然科学基金面上资助项目(41672260);湖北省自然科学基金重点资助项目(2013CFA110);中国地质大学工程学院包头城建基金资助项目

摘　　要：针对高地应力及高水力梯度等复杂地质环境下,深埋引水隧洞穿越组合富水断层破碎带发生突、涌水地质灾害的问题,以福建龙津溪引水隧洞为工程依托,提出基于平面一维流微分方程的引水隧洞组合富水断层控水模型涌水量计算方法,并从断层倾角和倾向2个角度考虑隧洞与断层的位置关系,从而确定模型中的3种典型平面一维流涌水模式的几何计算参数。基于隧洞与断层的空间位置关系,将计算区域划分为3个计算子区间:Ⅰ区(隧洞处于普通围岩)、Ⅱ区(隧洞处于断层影响带)和Ⅲ区(隧洞处于断层破碎带),分别对3个子区间的涌水量展开计算,并通过分段积分得到整个区段总涌水量,其中Ⅱ和Ⅲ区受断层以及高水力梯度的影响,需要考虑高速非达西修正。最后将理论计算结果与工程常用的裘布依公式、数值模拟计算以及现场实测数据进行对比,结果表明该方法计算组合富水断层隧洞涌水量具有切实可行性,且准确度较高。In respect to the water inflow and inrush disasters of diversion tunnel engineering through thecompound water-rich fault in complex geological environments, such as high initial geostress and high hydraulicgradient, the method based on one-dimensional flow differential equations for calculating the water inflow of thewater-rich faults water control model was proposed, based on the research work on Fujian Longjinxidiversiontunnel project. The parameters of three types of typical water inflow patterns were determined by considering theSpatial position relation of the tunnel and the fault from two aspects of fault dip and inclination. Then thecalculation interval was divided into three parts, zone I （the tunnel is located in the common rock masses）, zone II（the tunnel is located in the influence belt of faults） and zone III （the tunnel is located in the fault zone）. The water inflow in the section was obtained by subsection integral calculation. In addition, zone II and III influenced byfaults and high hydraulic gradient should be corrected for non-darcy flow. Finally, the results show that waterinflow calculated by the proposed method is feasible and more accurate, as compared with classical Dupuitformula, numerical simulation and measured data.

关 键 词：组合富水断层 涌水量预测 断层影响带 非达西渗流 平面一维流微分方程 

分 类 号：TU45[建筑科学—岩土工程]