断层与平行隧道空间位置关系对涌水量的影响研究  

Research on the influence of the spatial position relationship between faults and parallel tunnels on water inflow

作　　者：傅鹤林[1,2] 安鹏涛 成国文 李鲒 陈龙 余小辉[3] FU Helin;AN Pengtao;CHENG Guowen;LI Jie;CHEN Long;YU Xiaohui(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Laboratory for Construction Technology of High Speed Railway,Central South University,Changsha 410075,China;Guangdong Nanyue Transportation Investment&Construction Co.,Ltd.,Guangzhou 510101,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程试验室,湖南长沙410075 [3]广东省南粤交通投资建设有限公司,广东广州510101

出　　处：《铁道科学与工程学报》2022年第4期1032-1040,共9页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51978668);广东省交通运输厅课题(DFH(201904)YS1-001)。

摘　　要：作为渗流影响边界,断层是制约富水断层区隧道设计及施工的重要影响因素,研究断层对隧道涌水的影响具有重要的理论意义和工程应用价值。为分析断层与隧道空间位置关系对隧道涌水量的影响,将断层视为定水头边界,利用反映法将有界含水层用映射原理转化为无界问题,构建含断层的深埋平行隧道涌水简化计算模型。利用地下水力学理论、达西定律及线性叠加原理推导涌水量及结构承担的渗水压力计算式。忽略断层及平行隧道的干扰,初步验证本文构建模型的合理性及公式推导的正确性。基于理论公式对相关特征参数进行敏感性分析,揭示断层对隧道涌水的影响机理,探讨平行隧道及断层对涌水的影响特征。通过在建鸿图特长隧道检验涌水简化计算模型的适用性及有效性。研究结果表明:断层倾角竖直时,平行隧道与断层的垂直距离最大,渗流稳定时平行隧道涌水量最小;平行隧道水平距离对隧道涌水影响较为复杂,应综合考虑平行隧道与断层的相互干扰;平行隧道涌水量理论值与实测值差异分别为6.8%及10.5%,误差在可接受范围内。研究成果可为富水断层区隧道涌水量的计算及结构设计提供理论参考。As the influencing boundary of seepage,fault is an important factor restricting the design and construction of tunnel in water-rich fault area.Therefore,the study of the influence of fault on tunnel water inflow has important theoretical significance and engineering application value.In order to analyze the influence of the spatial relationship between the fault and the tunnel on the water inflow of the tunnel,the fault was regarded as the constant head boundary,the bounded aquifer was transformed into an unbounded problem by using the reflection method,and a simplified calculation model of water inflow of deep buried parallel tunnel with fault was constructed.Based on the theory of underground hydraulics,the Darcy’s law and the principle of linear superposition,the calculation formulas of water inflow and seepage pressure borne by the structure were deduced.Ignoring the interference of faults and parallel tunnels,the calculation results could degenerate to the existing analytical solution.The rationality of the model constructed in this paper and the correctness of the derivation of the formula were preliminarily verified.The sensitivity analysis of relevant characteristic parameters was carried out based on the theoretical formula.The influence mechanism of faults on tunnel water inflow was revealed,and the influence characteristics of parallel tunnels and faults on water inflow were discussed.Finally,the applicability and effectiveness of the simplified calculation model of water inflow were tested through the Hongtu super long tunnel under construction.The results show that when the fault dip angle is vertical,the vertical distance between the parallel tunnel and the fault is the largest,and the water inflow of the parallel tunnel is the smallest when the seepage is stable.The influence of horizontal distance of parallel tunnel on tunnel water inflow is complex,and the mutual interference between parallel tunnel and fault should be considered comprehensively.The difference between the theoretical and measur

关 键 词：断层 反映法 叠加原理 势函数 渗水量 

分 类 号：U45[建筑科学—桥梁与隧道工程]