摘要
通过室内试验研究了小浪底水库坝基防渗墙与心墙连接段的接触渗流控制性能。试验结果表明,如果防渗墙与心墙接触良好,则连接段具有较高的抗渗强度;若防渗墙与心墙接触不良,相互脱开,有集中渗流,则设置在渗流出口的级配良好的反滤层不仅可以防止心墙被接触渗流冲蚀,而且会使集中渗流最终消失;反滤层控制接触渗流的效果与其级配有关,细反滤层控制效果较好,对小浪底水库,当反滤层的d_(20)≤0.8mm时,可以保证防渗墙与心墙连接段的渗透稳定。
The paper studies the control function of contact leakage in the connected section between cut-off wall and core of the dam foundation of the Xiaolangdi Reservoir through indoor tests. The results shown that if the cut-off wall contacts well with the core, then the connected section has higher impervious strength; if it does not contact well, disjointed and has concentrated seepage, the filter which is located at the exit of seep age and in good gradation, can not only prevent the erosion in the core, but also disappear finally, the con centrated seepage. The result of seepage control of filter is related to the gradation and the fine filter has bet ter results. As to the Xiaolangdi Reservoir, when d_(20) of filter is≤0.8mm, stable seepage in the connected section can be guaranteed.
出处
《人民黄河》
CAS
北大核心
1993年第5期19-22,共4页
Yellow River
基金
国家自然科学基金
关键词
水库
坝基
截水墙
心墙
渗流控制
cut-off wall, core, contact seepage, seepage control, filter, the Xiaolangdi Reservoir
