Type of Document Dissertation Author Sleep, Matthew David Author's Email Address email@example.com URN etd-11222011-163016 Title Analysis of Transient Seepage Through Levees Degree PhD Department Civil Engineering Advisory Committee
Advisor Name Title Duncan, James Michael Committee Chair Brandon, Thomas L. Committee Co-Chair Filz, George G. Committee Member Mauldon, Matthew Committee Member Singh, Mahendra P. Committee Member Keywords
Date of Defense 2011-10-25 Availability restricted AbstractLevees are a significant part of the United States flood protection infrastructure.
It is estimated that over 100,000 miles of levees exist in the United States. Most
of these levees were designed many years ago to protect farmland and rural
areas. As growth continues in the United States, many of these levees are now
protecting homes and other important structures. The American Society of Civil
Engineers gave the levees in the United States a grade of D- in 2009. To bring
flood protection up to modern standards there requires adequate methods of
evaluating levees with respect to seepage, erosion, piping and slope instability.
Transient seepage analyses provide an effective method of evaluating seepage
through levees and its potentially destabilizing effects.
Floods against levees usually last for days or weeks. In response to a flood,
pore pressures within the levee will change from negative (suction) to positive as
the phreatic surface progresses through the levee. These changes can be
calculated by finite element transient seepage analyses. In order for the
transient seepage analysis to be valid, appropriate soil properties and initial
conditions must be used. The research investigation described here provides
simple and practical methods for estimating the initial conditions and soil
properties required for transient seepage analyses, and illustrates their use
through a number of examples.
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