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A platform for research: civil engineering, architecture and urbanism
Centrifuge Testing of Levees: Saturation Techniques during Model Construction
Levees in the Sacramento-San Joaquin Delta, located in Northern California, were constructed by placing soils dredged from adjacent channels in an unengineered manner atop highly compressible organic soils (i.e. peat). Two 9 m radius centrifuge experiments were performed at the NEES@UCDavis facility with the overall objective to evaluate (1) the seismic deformation potential of peat, (2) levee-peat interaction (analogous to soil-structure interaction), and (3) the liquefaction potential and seismic deformations of saturated loose sand fill overlying soft peat. This paper focuses on development and validation of a water pluviation device constructed to form saturated levee fill. P-wave velocity measurements using an ultrasound system were utilized to verify the degree of saturation achieved in the levee material by various construction methods. Correlations between P wave velocities and B-values are discussed. The vacuum saturation system is shown to provide a high degree of saturation, whereas more traditional water pluviation techniques are shown to produce unsaturated fill.
Centrifuge Testing of Levees: Saturation Techniques during Model Construction
Levees in the Sacramento-San Joaquin Delta, located in Northern California, were constructed by placing soils dredged from adjacent channels in an unengineered manner atop highly compressible organic soils (i.e. peat). Two 9 m radius centrifuge experiments were performed at the NEES@UCDavis facility with the overall objective to evaluate (1) the seismic deformation potential of peat, (2) levee-peat interaction (analogous to soil-structure interaction), and (3) the liquefaction potential and seismic deformations of saturated loose sand fill overlying soft peat. This paper focuses on development and validation of a water pluviation device constructed to form saturated levee fill. P-wave velocity measurements using an ultrasound system were utilized to verify the degree of saturation achieved in the levee material by various construction methods. Correlations between P wave velocities and B-values are discussed. The vacuum saturation system is shown to provide a high degree of saturation, whereas more traditional water pluviation techniques are shown to produce unsaturated fill.
Centrifuge Testing of Levees: Saturation Techniques during Model Construction
Yniesta, Samuel (author) / Cappa, Riccardo (author) / Lemnitzer, Anne (author) / Brandenberg, Scott J. (author)
IFCEE 2015 ; 2015 ; San Antonio, Texas
IFCEE 2015 ; 1197-1206
2015-03-17
Conference paper
Electronic Resource
English
CENTRIFUGE TESTING OF LEVEES: SATURATION TECHNIQUES DURING MODEL CONSTRUCTION
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