波浪影响下半无限含水层中隧道渗流场分析

Analysis of Seepage Field of Underwater Tunnels in a Semi infiniteAquifer under Wave Action

摘要:

根据线性波浪引起水下土体残余孔压增长理论，采用Laplace变换得到衬砌在受波浪荷载下的外水压力及渗流量，并得到水底带衬砌隧道渗流量和衬砌周边水头解答。计算结果表明：（1）波陡H/L>0.09后衬砌将要承担比静水压力引起的更大的外水压力，土体渗透系数减小波浪对隧道外水压力和渗流量的影响反而逐渐升高，当kL=1×10-7 m/s时，无论是波浪还是静水压力作用下隧道的渗流量都得到有效控制；（2）5~10 s周期的波浪及水深d

Abstract:

The existing seepage field calculation model of underwater tunnels generally ignores the influence of waves.On the basis of the theory of linear wave-induced pressure in soil，Laplace transformation was used to obtain the lining pressure and inflow.The results indicate that when the wave steepness exceeds 0.09，the lining bears more than that when pressure is applied by still water.The lining pressure and inflow increase as the soil permeability coefficient decreases.When the lining permeability coefficient kL=1×10-7 m/s both the lining inflow caused by waves and still water decrease.Moreover，the lining seepage field is influenced both when the water period ranges is 5~10 s and the depth d