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总结现有关于水下隧道渗流场解析研究的优点和不足,基于稳态渗流控制方程,结合保角变换方法,严格推导了水下隧道渗流场的解析解。该解能求解任意埋深考虑注浆圈作用的水下衬砌隧道渗流量以及水压力分布,并能退化到无衬砌水下隧道以及水下不透水管道两种极端情况,应用Comsol软件建立数值模型验证了新解答的正确性。利用本文解研究了隧道埋深、衬砌渗透系数、衬砌厚度等因素对隧道渗流量、衬砌外水压以及总水头分布的影响。研究发现当隧道埋深较小时,最大水压力出现在隧道顶部,而埋深较大时,则出现在隧道底部;衬砌外圈平均水压力及分布不均匀程度随着埋深的逐渐增大先减小后增加;其他参数不变时,存在某个埋深或者衬砌厚度使衬砌外水压力接近均布。
Based on the steady-state seepage control equations and the conformal mapping method, the analytical solutions of underwater tunnel seepage field are strictly deduced. The solution can solve the seepage and water pressure distribution of underwater lining tunnel with grouting circle buried at any depth, and can degenerate into two kinds of extreme cases of linerless underwater tunnel and underwater impervious pipeline. Comsol software is used to establish numerical model Verify the correctness of the new solution. The effects of tunnel depth, lining permeability coefficient and lining thickness on tunnel seepage flow, lining external hydraulic pressure and total head distribution are studied by using this solution. The results show that when the tunnel depth is small, the maximum water pressure appears at the top of the tunnel, while when the depth is larger, it appears at the bottom of the tunnel. The average water pressure and uneven distribution of lining outer ring increase with the depth increasing Decrease and then increase; other parameters remain unchanged, there is a depth or lining thickness of lining water pressure near the uniform.