| Summary: | 碩士 === 逢甲大學 === 土木及水利工程研究所 === 82 === In general, we use tradtional consolidation ring at the
labortary to analyze soil settlements of foundation. But, the
Terzaghi's one-dimensional consolidation theory must maintain
one-dimensional draining and consolidation settlements. The
diameter,thickness and the ratio of diameter to thickness must
be limited. And the lateral deformations occurring during
the consolidation test was not allowed. Therefore, the test
results could not satisfy the one-dimensional theory. there
have no papers mention about the lateral deformations and
influnces causing by the traditional consolidation test. We
took a view of the framework of the traditional consolidation
aparatus first. After that, we calculated the lateral
deformations and analyzed the excess pore water pressure of the
test specimen. In wiew of the abov , a true Ko consolidation
aparatus is proposed in this research. To demonstrate the
differences of the test results of a true Ko consolidation test
from a tradition one, six difference clayed soils were selected
in this research. The empirical equations of compression index
(Cc) an recompression index (Cr) deduced from the true Ko test
results have wide difference from Terzaghi and Peck's. The
compression index and recompression index of the tru Ko test
are smaller than the traditional's. The maximum differences
between them are 56.7% and 64.9%. Usually, the maximum past
vertical effective stresses of the true Ko test are greater
than the tradition's. And the coefficient of consolidation (Cv)
is generally subjected to change irregularly with the change of
the effective consolidation pressure. Thus, the obtained
results from this research is not sufficient to give a certain
conclusion for the influence of lateral deformation on the
coefficient of consolidation.
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