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|Title:||Geotechnical centrifuge experiments to evaluate piping in foundation soils|
|Authors:||Flood and Coastal Storm Damage Reduction Research Program (U.S.)|
Leavell, Daniel A.
Wibowo, Johannes L.
Yule, Donald E.
Strange, Ryan C.
|Publisher:||Geotechnical and Structures Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||ERDC/GSL TR ; 14-14.|
Abstract: The general objectives of the centrifuge tests for this research were to model a realistic geologic prototype of a levee with a foundation containing a sand layer that is susceptible to an internal erosion/piping failure mechanism with objectives to initiate and monitor piping. Parameters that could influence piping/erosion in levee foundation soils were evaluated (i.e., depth of erodible material, density of erodible material, and confining stress). Centrifuge testing and numerical modeling were performed on three geotechnical models constructed with soils similar to those found in the US Army Corps of Engineers levee portfolio. Models 1 and 2 had a clay levee that was founded on a Nevada Sand layer sandwiched between two Longhorn Red Clay layers. Model 3 had a foundation consisting of a Longhorn Red Clay top layer, then a clayey sand layer, followed by Nevada Sand and, finally, a bottom layer of Longhorn Red Clay. Varying gravity loadings were selected based on a prototype structure 5 to 12 ft. in height. All models developed piping that moved from a downstream relief hole back under the levee toward the upstream reservoir. The results from the three centrifuge tests showed that subsurface erosion could be modeled in a centrifuge.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|