摘要
天然沉积或填筑的散粒状粗粘土的渗透性，存在各向异性，通常水平向大于垂直向，当渗流为水平向时，需进行原位水平渗透试验。由于现场渗流边界条件复杂，试验有一定难度。笔者在天生桥一级电站混凝土面板堆石坝的碎石垫层料碾压层上进行原位水平渗透试验，采用试坑注射，隔水材料用粘土保证水平渗流，效果较好，方法简单易行。
The permeability of natural deposit or filling particulated coarse clay has anisotropy Usually, the horizontal one is greater than the virtical one. When the seepage is horizontal, an in-situ horizontal seepage test is necessary. But it is difficult at some extent because boundary conditions of seepage are complex on site. The authors carried out an in-situ horizontal seepage test in a compacted crushed stone layer of the concrete face rockfill dam at Tianshengqiao Ⅰ Hydropower Station. Water injection test pit was adopted. Clay was used as water-resisting material to ensure the horizontal seepage successful. Good effect was achieved. It showed that the method was simple and easy.
出处
《云南水力发电》
1997年第2期62-64,共3页
Yunnan Water Power
