Settlement of embankments constructed of unsaturated compacted soil
Date
2014-09-17
Authors
Annandale, George William
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Abstract
The purpose of this investigation was to establish a
method to determine settlement in compacted unsaturated soil
(with special reference to embankments) by using oedometer
test results.
A review of the behaviour and the principle of effective
stress in unsaturated soil is g i v e n . The conclusion is
reached that consolidation in unsaturated soil is largely
controlled by the dissipation of excess pore-air pressure.
Methods are described to determine the soil parameters
that are required to estimate pore-air pressures in
unsaturated soil from oedometer tests.
A computer program is described to estimate pore-air
pressures in embankments at the end of construction and at
specified time intervals after completion.
A case study on the Mita Hills dam in Zambia is reported
and calculated settlements of this embankment are compared
with observed settlements.
Description
A Dissertation submitted to the Faculty of Engineering,
University of the Witwatersrand , Johannesburg in partial
fulfilment of the requirements for the degree of Master
of Science in Engineering
JOHANNESBURG
1979