摘要
基于浆液扩散半径的概念,推导了方格形和梅花形两种布孔形式最优布孔的通用公式。方格形最优布孔为正方形,其孔、排距均为2^(1/2)R。梅花形最优布孔的α角随排数的增加而减小,作为特例,单排的α角为45°,多排的α角趋于下限值30°。从最优布孔的概念出发,提出了通过灌浆试验确定浆液扩散半径的方法。
In this paper,the optimum arrangement of grouting holes is studied,and a universal formula for deter- mining hole intervals are given as well.Square arrangement is better for rectangular system,the optimum intervals of holes and rows are all equal to 2~1/2 R.The optimum intervals of holes and rows for triangular system are dependent upon angle which decreases when row number increases.Especially,the optimum ar- rangement is obtained where a approaches 45° for single row,and 30° for infinite rows.The method to de- termine grout divergence radius by means of grouting test is also included.
出处
《人民黄河》
CAS
北大核心
1992年第8期38-40,共3页
Yellow River
关键词
灌浆
布孔
浆液扩散半径
grout
hole arrangement in square or rectangular
optimum arrangement
grout divergence radius
