Abstract
The study goal was to demonstrate that PENCEL
pressuremeter (PPMT) test would generate reliable
engineering parameter to allow engineers to more precisely
carry out the standardized tests, and to produce the p-y curves
for analysis and design of laterally loaded piles. The PENCEL
was pushed to the desired test depth using the Cone
Penetrometer equipment. Based on the results of a
comprehensive testing program the evaluation indicates the
testing procedure is acceptable. A recommended interpretation
and procedure are presented. An evaluation of the proposed
methods is presented using data from a number of in-situ
PPMT tests conducted in Cape Canaveral site. From PPMT
data, which were reduced to graphs of pressure versus volume
and pressure versus relative change in probe radius, soil
parameters including the lift-off pressure, the initial elastic
moduli, the reload moduli, and the limit pressure of the soils
were determined. The two latter parameters were utilized to
establish the p-y curves via the conversion of the PPMT stress
to force per unit length and the PPMT strain to obtain
displacement.The PPMT soil parameters show good agreement
with published values. Dilatometer (DMT) tests were
conducted for comparisons with PPMT data. Correlations were
developed between the PPMT and DMT results, which show
consistency in soil parameters values. Comparison between
PPMT and DMT p-y curves were performed based on the slope
of the initial portion of the curve, the curves shape, and the
ultimate soil resistance. The initial slope shows a good
agreement for this comparison. The expected PPMT and DMT
deflections within the elastic range are identical, while the
expected DMT and PPMT ultimate loads are not similar. It is
possible to install the PPMT in a manner which models the
disturbance caused during pile installation and predict the
analysis of the laterally loaded soil resistance.
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