Abstract
With the constant development of construction technology of embankment dam, the constructed embankment dam becomes higher and higher, and the embankment dam with its height over 200m will always adopt the current design criteria of embankment dam only suitable for the construction of embankment dam low- er than 200m in height. So the design criteria of high embankment dam shall be improved. We shall calculate the stability and safety factors of dam slope of high embankment dam under different dam height, slope ratio and different seismic intensity based on ratio of safety margin, and clarify the change rules of stability and safety factors of dam slope of high embankment dam with its height over 200m. We calculate the ratio of safety margin of traditional and reliable method by taking the stable, allowable and reliability index 4.2 of dam slope of high embankment dam with its height over 200m as the standard value, and conduct linear regression for both. As a result, the conditions, where 1.3 is considered as the stability and safety factors of dam slope of high embank- ment dam with its height over 200m under seismic condition and 4.2 as the allowable and reliability index, are under the same risk control level.
Highlights
With the constant development of construction technology of embankment dam, a series of dams, such as Nuozhadu, Shuibuya and Shuangjiangkou dam, with their height over 200m have been constructed
This paper uses non-linear intensity index to calculate the safety factor and reliability index for the stability model of dam slope of high embankment dam under normal and seismic condition [5,6,7], and determine the stability and safety factor of dam slope of embankment dam with its height over 200m based on the theory [7,8] of ratio of safety margin and by comparing the corresponding ratio of safety margins for both
With the increase of dam height, the non-linear feature of intensity index of dam body material leads to the decrease of overall intensity index along the slip surface of dam material, and the properly slowing down the dam slope is one of the method to ensure the anti-slippery stability of dam slope of high embankment dam meets the criteria and requirement
Summary
With the constant development of construction technology of embankment dam, a series of dams, such as Nuozhadu, Shuibuya and Shuangjiangkou dam, with their height over 200m have been constructed. This paper uses non-linear intensity index to calculate the safety factor and reliability index for the stability model of dam slope of high embankment dam under normal and seismic condition [5,6,7], and determine the stability and safety factor of dam slope of embankment dam with its height over 200m based on the theory [7,8] of ratio of safety margin and by comparing the corresponding ratio of safety margins for both
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