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Signorini型变法不等式方法是求解有自由面渗流问题的一种新方法,该方法理论基础严密,并克服了渗流溢出点的奇异性。通过给出一种含有Signorini型互补条件的抛物变分不等式(PVI)方法,将Signorini型变法不等式方法从稳定渗流分析拓展到非稳定渗流分析,并给出了其有限元数值计算格式和数值模拟流程。在此基础上,针对已有的砂槽模型试验数据,通过对比研究基于PVI方法的非稳定渗流分析成果和饱和-非饱和渗流分析结果,论证了该方法的有效性,并讨论了该方法的适用条件。最后,应用上述方法对含有复杂渗控措施的水布垭工程开展了非稳定渗流分析,通过与大坝坝体、趾板、灌浆廊道围岩、地下厂房围岩等部位实测渗压数据和坝后量水堰实测流量数据的对比分析,表明计算结果很好地反映了水布垭工程厂、坝区岩土体在蓄水及运行过程中渗流场的变化规律,系统揭示了混凝土面板、防渗帷幕、排水孔幕及排水廊道等工程渗控措施的渗流控制效应。研究成果对于含有复杂渗控措施、并具有稳定补给源的岩土工程非稳定渗流分析具有指导意义。
Signorini-type transformation inequality method is a new method to solve the seepage problem with free surface. The method is based on theory and overcomes the singularity of seepage overflow point. By means of a parabolic variational inequality (PVI) method with Signorini type complementary conditions, the Signorini type inequality method is expanded from steady flow analysis to unsteady seepage analysis, and its finite element numerical calculation format and numerical simulation Process. On this basis, according to the existing experimental data of sand tank model, the non-steady-state seepage analysis results based on PVI method and the saturated-unsaturated seepage analysis results are compared to demonstrate the effectiveness of the method. The effects of this method Applicable conditions. Finally, the unsteady seepage analysis of Shuibuya Project with complicated seepage control measures is carried out by the above method. Through the measured seepage pressure data with the dam body, plinth, the surrounding rock of the grouting corridor, the surrounding rock of the underground plant and other parts The comparative analysis of measured flow data after the dam weir shows that the calculation results well reflect the variation regularity of seepage field of rock and soil in Shuibuya Project Works and dam areas during the water storage and operation. The system reveals the concrete slabs, Seepage control curtain wall, drainage hole curtain and drainage corridor and other seepage control measures seepage control effect. The research results are instructive for unsteady seepage analysis of geotechnical engineering with complicated infiltration control measures and stable supply sources.