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Parametric Study of Levee Saturation for Undrained Rapid Drawdown Analysis
Başlık:
Parametric Study of Levee Saturation for Undrained Rapid Drawdown Analysis
Yazar:
Poston, Kalie B., author.
ISBN:
9780355941340
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (95 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Daniel R. VandenBerge Committee members: Joseph Asante; Alfred J. Kalyanapu.
Özet:
As infrastructure continues to age and natural disasters highlight weaknesses in this infrastructure, there has been an increased focus to analyze levees for rapid drawdown (RDD) failure; however, practitioners are lacking the guidance to do so. Geotechnical engineers have typically used multistage undrained methods to analyze the RDD condition in dams. In order to analyze the RDD condition for a levee with multistage undrained methods, the likely saturated zone within the levee must be determined, followed by the shear strength for both the saturated and unsaturated zones. The saturated zone can be estimated using transient seepage analysis. However, as there are more than 100,000 miles of levees in the United States alone, it is impractical to perform transient seepage analyses for multiple flood scenarios along every levee reach. Taking into account the considerable variance in levee characteristics and flood conditions that may be experienced, it would be beneficial to have a quick and simple method to determine the approximate extent of the saturated zone within a levee at the end of a flood (i.e., the start of drawdown).
In support of this broader goal, a method is presented that uses soil properties, flood hydrograph, and levee geometry that can be used to quickly estimate the saturated zone in a levee following a flood. The method was developed by performing a parametric study that involved more than 180 transient seepage analyses. The results of these analyses were used to define a relationship between the extent of levee saturation and a combination of levee geometry, flood hydrograph, and soil properties. Utilizing a wide range of values for the properties varied for each transient seepage analysis, the method allows a user to predict the saturated zone in a levee for conditions that were not used in the development of the method. The method allows an analyst to use either a chart or a set of equations to define the saturated zone in a simple manner for levees that are isotropic, initially unsaturated, and have an impervious foundation. This saturated zone can then be used as a starting point for undrained RDD analysis.
Notlar:
School code: 0390
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(690388.1) | 690388-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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