改进阻力系数法与AUTOBANK有限元分析法对某水闸防渗墙不同贯入度的对比研究

Comparative Study on Different Penetration of Impervious Wall of a Sluice by Improved Resistance Coefficient Method and Auto Bank Finite Element Analysis Method

水闸防渗一直是水闸设计过程中技术性难题。改进阻力系数法是水闸设计规范推荐土基上闸基渗透计算方法,该文结合实际工程案例,研究水闸防渗墙不同贯入度所产生的防渗效果,通过AUTOBANK有限元分析法和改进阻力系数法的对比分析,得出了防渗墙不同贯入度产生防渗效果的一般规律,提出了工程实际应用水闸防渗墙最佳贯入度。根据计算结果,表明两种计算方法在闸基渗流求解问题上均较为可靠,同时改进阻力系数法计算结果偏小且存在计算局限性,AUTOBANK有限元分析法计算结果偏大,更有利于工程安全稳定。

The seepage prevention of sluice has always been a technical problem in the design process of sluice.The improved resistance coefficient method is the seepage calculation method recommended by the sluice design code for the foundation on the soil foundation.In this paper,the seepage prevention effect of different penetration of the cutoff wall of the sluice is studied in combination with the actual engineering case.Through the comparative analysis of the autobank finite element analysis method and the improved resistance coefficient method,the general law of seepage prevention effect produced by different penetration of the cutoff wall is obtained,and the optimal penetration of the cutoff wall of the sluice is put forward.According to the analysis results,it is shown that the two calculation methods are reliable in solving the seepage problem of gate foundation.At the same time,the calculation result of the improved resistance coefficient method is small and has limitations.The calculation result of the autobank finite element analysis method is large,which is more conducive to the safety and stability of the project.