水下隧道渗流场解析解及其应用

 以复变函数和地下水水力学理论为基础，推导由围岩、注浆圈、衬砌混凝土组成的水下隧道渗流场解析解。以厦门海底隧道F4风化囊地段为工程背景，研究影响围岩、注浆圈、衬砌的渗流参数对衬砌外水压力和渗流量的影响。研究结果表明，注浆圈和初期支护施工效果对衬砌后水压力和渗流量的影响很大，应重视注浆圈和初期支护的施工。当排水系统堵塞，渗流量减小时，初期支护和二次衬砌的外水压力会重新分配。结合理论计算和现场实测水压力结果，提出在堵水限排情况下，初期支护水压力可降至静水压力的1/3。

ANALYTIC SOLUTION FOR SEEPAGE FIELD OF SUBSEA TUNNEL AND ITS APPLICATION

Based on complex function and groundwater hydraulics theory，the analytic solution for seepage field of subsea tunnels，which is made up of surrounding rock，grouting circle and lining concrete，has been deduced. Using the F4 entire strong weathering bursa of Xiamen subsea tunnel as engineering background，the influences of seepage parameters of surrounding rock，grouting circle and lining on water pressure on primary support and seepage discharge are studied. The study results indicate that the construction qualities of grouting circle and primary support have great influence on seepage discharge and water pressure on primary support，so the constructions of grouting circle and primary supporting should be emphasized. In case of the blocked drainage system and the decreasing seepage discharge，the water pressure on the primary and second support will be redistributed. Considering the theoretical analysis result and the data by real time monitoring of water pressure on site comprehensively，it is put forward that in the circumstance of limit drainage，the water pressure behind the primary support can be reduced to 1/3 of the full hydrostatic pore pressure.