| 郭江涛,张爱军.深厚覆盖层上土石坝的渗流控制方案研究[J].干旱地区农业研究,2012,30(2):181~187 |
| 深厚覆盖层上土石坝的渗流控制方案研究 |
| Research on seepage control schemes of earth-rock dam with deep overburden layer |
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| DOI：10.7606/j.issn.1000-7601.2012.02.31 |
| 中文关键词: 深厚覆盖层 土石坝 渗流控制 分析 |
| 英文关键词:deep overburden layer earth-rock dam seepage control analysis |
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| 中文摘要: |
| 我国西部地区地质条件复杂，土石坝建设中经常会遇到深厚覆盖层地基。深厚覆盖层地基的存在，将导致水库渗漏，并可能危及大坝安全，其渗流控制问题显得尤为突出和紧迫。以西藏某水利枢纽工程为例，采用有限元分析的方法，对该工程 “无防渗”、“上游黏土铺盖”、“下游褥垫排水”、“下游黏土压盖”及“坝基无防渗”、“悬挂混凝土防渗墙”、“混凝土防渗墙下接帷幕灌浆”、“全防渗墙”等8种防渗方案从渗漏量、浸润线和渗透稳定性等几个方面进行了二维及三维比较计算，得到了最优防渗方案的选取与坝基渗透系数之间的关系，验证了深厚覆盖层坝基垂直防渗方案的明显效果，可供同类工程参考。 |
| 英文摘要: |
| As the geological conditions in west China are are complicated, deep overburden foundation often exists in the construction of earth-rock dams. Deep overburden foundation results in the leakage of reservoir and possibly endangers the safety of the dam, so the seepage control problem is particularly prominent and urgent. A water conservancy project in Tibet was taken as an example and finite element analysis method was used to conduct two-dimensional and three dimensional calculation of infiltration line and seepage quantity and stability of 8 kinds of seepage control schemes of this project, such as“no impervious”,“upstream clay blanket”, “downstream mattress drainage”, “downstream clay gland”, “non-impervious dam foundation”, “hanging concrete anti-seepage wall”, “down with curtain grouting anti-seepage concrete wall”and“impervious wall”. The relationship between optimum anti-seepage scheme selection and seepage coefficient was found out, and the effect of the scheme of deep overburden layer of vertical seepage control was verified, wich may be used as a reference for similar engineering. |
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