海底隧道全断面注浆渗流场分析

围岩的注浆效果直接影响到海底隧道的施工安全。采用数值计算方法对固定水头的海底隧道在不同注浆圈厚度、注浆圈渗透系数以及排水方式下,隧道的涌水量和衬砌外水压力进行计算与分析。并将数值模拟的结果与轴对称解析解结果进行对比,结果表明:(1)不同的隧道防排水方式对衬砌外压有着明显的影响;(2)注浆圈的径向加固范围对隧道涌水量和衬砌外水压力产生一定的影响,但其效果并不明显;(3)注浆圈的渗透系数对隧道的涌水量和衬砌的外水压力有较大影响。

Analysis of Seepage Field of Full-face Grouting for Submarine Tunnel

Grouting effect is directly related to the construction safety of a submarine tunnel. This paper, by using numerical simulation method,focusing on the submarine tunnel with constant water head under the conditions of different grouting circle thicknesses,different grouting circle seepage coefficients and different water drainage modes,calculated and analyzed the tunnel's water inflow and the lining's external water pressure. And then the result obtained from numerical simulation was compared with that obtained from axisymmetric analytical solution. The analysis and comparison results show that:( a) different tunnel waterproof and drainage modes have significant influences on the lining's external water pressure;( b) the radial scope of grouting circle has a certain influence on tunnel's water inflow and lining's external water pressure,but not obvious;( c) the permeability coefficient of grouting circle has greater influence on tunnel's water inflow and lining's external water pressure.