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排水孔幕常用于减小作用于重力坝坝基、拱坝的拱座、地下洞室及岩石边坡的扬压力,由于排水孔孔径太小,受排水孔幕影响的渗流场分析是长期以来未有满意解答的一个问题。本文建议了一种有效的解法,要点是将含有排水孔幕的单元分解成若干子结构,每个子结构含有一个排水孔。本文提出了一种子结构求解方法,并给出一介实际工程的实例分析。
Drainage hole curtains are commonly used to reduce the uplift pressure acting on the foundation of gravity dam, arch abutment, underground cavern and rock slope. Due to the too small diameter of drainage hole, the analysis of seepage field affected by drainage hole curtain has not been done for a long time A question that has a satisfactory answer. In this paper, an effective solution is proposed. The key point is to decompose the unit containing the drainage hole curtain into several substructures. Each substructure contains a drainage hole. This paper presents a substructure solution method and gives an example analysis of the actual project.