595
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Use of penetration testing for determination of soil properties in earth dam
ploi des essais de pénétration pour déterminer les propriétés de sol pour barrages en
terre
Mulabdic M.
nned, due to bad
order to assure
mpacted dam and
in situ
test on the
on the crest.
sed, since standard
acting clay. It has
, but also that one
nkments.
e mauvaise
avoir des données
t les propriétés de
s essais in situ sur
CPT) et les essais au dilatomètre (DMT) in
otentiel de ces essais dans la description des
de ces essais sont basées sur les
ontré que les essais CPT et
DMT sont utiles pour l’analyse d’état du sol compacté, mais qu’il faut être très attentif dans l’emploi des procédés standard
e ces essais quand il s’agit des essais pour les ouvrages en remblai.
cone test, flat dilatometer test, interpretation
e, essai au piézocône, essai au dilatomètre plat, interprétation
irrigation
e deepest
ay from
it was
ly follow
zoned
d degree
ng of the
covered
e were
d. It w
against
echni
ld ha
should have been checked in detail. The site test
program consisted of drilling boreholes for gett
samples for laboratory testing of clay, of penetrat
testing – CPT and a flat dilatometer test (Marchetti
dilatometer – DMT). This paper presents the results of
analysis of the properties of clay in the dam based on
in
situ
(CPT and DMT) and laboratory testing. Only
boreholes in the crest were used for the analysis, see
Fig. 1.
Em
University in Osijek, Croatia
ABSTRACT: The Paper describes a case of a small earth dam for which remediation work was pla
construction and possible damage to the dam that could have occurred during filling of the retention. In
relevant data for the remediation design solution it was necessary to determine the current state of the co
properties of the clay fill in the dam. Investigation work consisted of drilling boreholes and performing
dam, and of laboratory testing of soil samples. CPT and DMT
in situ
tests were carried out nearby the boreholes
Potential of these
in situ
tests in describing physical and mechanical properties of the clay was analy
methods of interpretation of these tests are based on natural soils, while the dam was constructed by comp
been shown that CPT and DMT tests are useful in describing properties of a compacted clay embankment
should be cautious in using common methods of interpretation of their test results in case of earth fill emba
RÉSUMÉ : L’article décrit le cas d'un petit barrage en terre, pour lequel une remise en état est planifiée à cause d
réalisation et du danger potentiel d’endommagement au cours de remplissage de la retenue. Afin d’
pertinentes pour les techniques de confortement il a été nécessaire de déterminer l’état actuel du barrage e
l’argile utilisée dans la construction du barrage. Les travaux de reconnaissance ont compris les forages et le
le barrage, ainsi que les essais en laboratoire. Les essais de pénétration au cône (
situ ont été faits auprès des trous de forage dans la crête du barrage. Le p
propriétés physiques et mécaniques d’argile est analysé, étant donné que les interprétations
sols naturels tandis que l’argile a été mise en œuvre dans le barrage par compactage. It est dém
d’interprétation des résultats d
KEYWORDS: earth dam, compacted clay, piezo
MOTS-CLÉS : barrage en terre, argile compacté
1. INTRODUCTION
A small earth dam was built as a part of a future
system. The dam was about 10-meter high at th
point in depression, and was constructed of the cl
its vicinity. During the construction of the dam
noticed that the construction company didn't ful
the design requirements and criteria related to
construction, replacement of foundation soil an
of compaction of the lifts of clay. During the filli
lake, when only few meters of dam slopes were
with water, problems with bottom discharg
observed and filling of water had to be stoppe
decided that the dam should be checked for safety
sliding and deformability, for which geot
properties of compacted clay in the dam shou
been
as
cal
ve
ing
ing
ion
Figure 1. Position of
in situ
tests and boreholes on the dam; most
important work was done on the crest (line B2-C4)
From the samples taken during drilling boreholes
specimens were formed for the laboratory testing
program, which comprised the testing of physical and
mechanical properties of clay from the dam. Fig. 2 shows
the plasticity of clay from the dam, determined on
samples from the B2 and B5 boreholes.
