穿越富水断层深埋引水隧洞涌水量预测研究
发布时间：2018-11-10 23:52
【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。
[Abstract]:In order to solve the problem of geological hazards of water gushing through the broken zone of composite water-rich fault in the complex geological environment such as high in-situ stress and high hydraulic gradient, the deep-buried diversion tunnel is based on the Longjinxi diversion tunnel in Fujian Province. Based on one-dimensional differential equation of flow in plane, a method for calculating the water inflow of water-controlling model of water-rich fault combined with water-rich tunnel is proposed. The location relationship between tunnel and fault is considered from two angles of fault inclination and inclination. The geometric calculation parameters of three typical plane one-dimensional flow inrush modes in the model are determined. Based on the spatial position relationship between the tunnel and the fault, the calculated area is divided into three calculation subsections: area I (the tunnel is in the common surrounding rock), area II (the tunnel is in the fault influence zone) and area III (the tunnel is in the fault fracture zone). The total water inrush of the whole section is calculated by the piecewise integral of the three subzones. The effect of fault and high hydraulic gradient on the 鈪，
本文编号：2323927
[Abstract]:In order to solve the problem of geological hazards of water gushing through the broken zone of composite water-rich fault in the complex geological environment such as high in-situ stress and high hydraulic gradient, the deep-buried diversion tunnel is based on the Longjinxi diversion tunnel in Fujian Province. Based on one-dimensional differential equation of flow in plane, a method for calculating the water inflow of water-controlling model of water-rich fault combined with water-rich tunnel is proposed. The location relationship between tunnel and fault is considered from two angles of fault inclination and inclination. The geometric calculation parameters of three typical plane one-dimensional flow inrush modes in the model are determined. Based on the spatial position relationship between the tunnel and the fault, the calculated area is divided into three calculation subsections: area I (the tunnel is in the common surrounding rock), area II (the tunnel is in the fault influence zone) and area III (the tunnel is in the fault fracture zone). The total water inrush of the whole section is calculated by the piecewise integral of the three subzones. The effect of fault and high hydraulic gradient on the 鈪，
本文编号：2323927
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