摘要
从根治乌拉泊土坝病害工程的实际出发,对强透水性坝基进行防渗措施处理。利用三向渗流数值模型,研究防渗墙和灌浆帷幕两种防渗方案及防渗墙在四种不同长度条件下渗流场地下水等势线的分布情况和渗流要素的变化规律。同时根据已有的地勘资料,对坝基及下游地层进行渗透变形分析计算,提出允许坡降,从而选择了经济可靠的垂直防渗措施的合理长度。
With a view to permanently control the dangerous wulapo earth dam,seepage prevention measures were taken for seriously permeable dam foundation treatment.By application of three dimensional seepage numerical model,cutoff wall and grout curtain were considered as seepage control alternatives,distribution of underground water iso-potential in seepage field and changing regularity of key seepage factors under four lengths of cutoff wall were studied.In light of obtained geologic prospecting data, seepage deformation in dam foundation and downstream strata were studied and calcu-lated. Allowable gradient was prosposad for economically and reliablely selecting sui-table length of vertical seepage control installations.
出处
《四川水力发电》
1992年第2期31-37,88,共8页
Sichuan Hydropower
关键词
土坝
渗透
变形
地基
稳定性
earth dam, seepage deformation, dangerous dam, allowable gradient, numerical model.
