| 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 |
| Key Words: deep overburden layer earth-rock dam seepage control analysis |
| Author Name | Affiliation | | GUO Jiangtao | College of Water Resources and Arcthitectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China
Yangling Vocational and Technical College, Yangling, Shaanxi 712100, China | | ZHANG Aijun | College of Water Resources and Arcthitectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| 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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