针对现有隧道渗流场解析公式没有从三维角度考虑防排水系统的问题，建立含有防排水系统的隧道渗流计算模型，并推导隧道涌水量的解析公式。通过将解析解与退化公式及数值模拟结果进行对比，验证解析解的合理性，进而分析土工织物渗透性、排水管间距和围岩渗透性对隧道涌水量的影响。研究结果表明： 1）土工织物堵塞、排水管间距增大、围岩渗透系数降低均会导致隧道涌水量减小。2）当土工织物渗透系数量级为10-4~10-7 m/s时，隧道涌水量会明显降低； 当土工织物渗透系数量级小于10-7 m/s时，排水系统完全堵塞，隧道丧失排水能力。3）排水管间距设计在8~12 m时最为合理。4）围岩渗透系数越小，隧道涌水量越小。
The existing tunnel seepage analytical solution
formula does not consider the threedimensional drainage system.
Therefore, a tunnel seepage calculation model with drainage system is
established, and the analytical formula of tunnel water inflow is deduced. In
addition, the analytical solution is compared with the degradation formula and
numerical simulation results to validate the rationality of the analytical
solution, and further examine the influence of geotextile permeability,
drainage pipe spacing, and surrounding rock permeability on tunnel water
inflow. The results show the following: (1) The blockage of geotextile, the
increase of drainage pipe spacing, and the decrease of surrounding rock
permeability coefficient will lead to the decrease of water inflow. (2) When
the geotextile permeability decreases in the range of 10-4 and 10-7 m/s, the tunnel water inflow reduces significantly. When the
geotextile permeability is less than 10-7 m/s, the tunnel drainage system is blocked completely and the
tunnel loses drainage capacity. (3) The most reasonable design spacing for
drainage pipes is 8~12 m. (4) The smaller the permeability of surrounding rock,
the less the tunnel water inflow.
