The Gloucester test fill

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Pages299317; # of pages: 19
Subjectmarine clay; shear stresses; pressure tests; strain; contrainte de cisaillement; essai de pression; deformation
AbstractA granular test fill 12 ft (3.7 m ) high, 30 ft (9.1 m) wide at the top, and 120 ft (36.6 m) long with 1.5 to 1 side slopes was constructed on the floor of a 4-ft (1.2 m) deep excavation in marine clay near Ottawa, Canada. Earth pressure cells were installed to measure the normal ( vertical and horizontal) and shear stresses transmitted at the base of the fill. Pore water pressures, vertical settlements and horizontal deformations were monitored at various positions and depths, both within and below the fill. A closed form solution, assuming linear elasticity, provided a good estimate of the stresses at the end of construction. A solution that assumed a trapezoidal loading for the embankment did not correlate with the measured stresses. Laboratory CIU, CAU and plane strain strength tests were performed to provide data for predicting stress and pore water pressure distribution and displacements. A good agreement was obtained between measured and predicted initial excess pore water pressures using a pore pressure equation that accounted for changes in all three principal stresses. Agreement was also obtained between the measured and predicted values for elastic heave due to excavation and for recompression due to construction of the fill.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number12729
NPARC number20374230
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Record identifierbe1065a3-2682-4f01-8e00-91a1d380f684
Record created2012-07-23
Record modified2016-05-09
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