Analysis about the Influence of Clay Core Wall Structure towards the Slope Stability of High Embankment Dam
1 Tianjin Port Engineering Institute Ltd. of CCCC First Harbor Engineering Company Ltd., Tianjin, China
2 Key laboratory of port geotechnical engineering, ministry of communications, PRC Tianjin, China
3 Key laboratory of port geotechnical engineering of Tianjin, Tianjin, China
As the main part of the anti-seepage system, core wall is a key point in the design of high em-bankment dam. The dam slope stability is a major factor for the type of core wall. But it is still unclear what effects the core wall structure might have on the slope stability. Based on practical projects of high embankment dam in Nuozhadu, Lianghekou and Shuangjiangkou, this paper analyzes safety factors and dangerous slip sur-faces of dam slopes of high embankment dams in both straight and slanting core wall structures and compares the influences of different core wall structures on the slope stability of high embankment dam through numerical calculations. The safety margin of the embankment dam of straight core wall is larger than that of slanting core wall in the operating condition of the reservoir water level’s drawdown. Compared with that of the straight core wall scheme, the position of the dangerous slip surface of the downstream dam slope is closer to the dam crest in the slanting core wall scheme.
Key words: high embankment dam / core wall type / dam slope stability / safety factor
© Owned by the authors, published by EDP Sciences, 2015
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