无限深透水地基上土石坝坝基垂直防渗的保角变换渗流计算

Seepage calculation of earth-rockfill dams with vertical cut-off wall on infinite deep pervious foundation by using transformation method

摘要: 近年来,在无限深透水地基或深厚覆盖层地基上修建土石坝的水利工程日趋增多,且有很多采用倒悬挂式防渗墙进行渗流控制.对于这种坝型的渗流计算,尚缺乏精确而简捷的理论公式,常采用近似的估算或经验公式.本文采用保角变换的方法,通过建立数学模型推导出在均质且理想边界条件下,土石坝基垂直防渗的渗透压力、渗流量和出逸坡降计算公式.公式简单,不仅可以计算渗透坡降和坝基渗流量,还可以计算渗透压力的分布,且相对于有限元和边界元计算模型,其计算量要小的多,计算结果的精度也能满足要求.

Abstract: In recent years,more and more hydraulic projects are built on the infinite deep pervious foundation and many of them take the hanging cut-off walls to solve the seepage control of dam foundation problems.But as for the seepage calculation of these dams,there is not any accurate theoretical formula.As a result,approximate formulas or empirical functions are often used.In this paper the conformal transformation method is used to get the inferential reasoning formulas: seepage pressure formula,seepage discharg...