CFRDs
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Using anti–spalling reinforcement in
canyons and developed solutions for future
design of higher structures.
tested preliminary innovative procedures
to
the central compression joints.
control face slab cracks in the face construction.
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Introducing compressible fillers in the central
compression joints to mitigate excessive
compression stresses.
The International Society of CFRDs
participated in the 5th Dam Engineering
Conference in Lisbon, Portugal in 2007. In
Distressing signs
t
h
i
s
During 2005-6 three CFRDs pre
compression d ss with a sudden and
noticeable increase in leakage through
central portion of the dam. The dams were: Barra
sented high
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Incorporating additional vertical joints near
abutments in narrow valleys.
Conference Dr Humberto Marengo, from the
Federal Commission of Electricity in Mexico,
pr d the experience of designing and
constructing El Cajon CFRD in Mexico, one of
i
s
t
r
e
es
the
Using competent well designed water stops.
e
s
e
n
te
Grande (185m) in Brazil; Campos Novos
in Brazil; Mohale (145m) in Lesotho.
(202m)
Following
these rules recent CFRDs have
the highest CFRDs built in the world
excellent performance.
with
been built successfully such as:
These dams were located in narrow valleys,
with uniform graded b producing relative
low modulus of compressibility
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Shuibuya (233m) in China.
In early 2008 the society was
o
ffi
c
i
a
ll
y
asalt
Bakun (205m) in Malaysia.
El Cajón (188m) in Mexico.
La Yesca (206m) in Mexico.
Kárahnjúkar (196m) in Iceland.
registered in California, US with the support of
Hydrou, an Engineering firm from China.
The journal of the society CFRD World has
been published from the beginning with articles
(50-60MPa).
During filling of the reservoir, friction forces
between the rockfill and face slab were
developed which resulted in high stresses
by members detailing their experiences of n
dams built in the
In May 2009, the society participated in
23rd ICOLD conference in Brazil and society
members Materon, Cruz and published
the book ncr e Face Rockfill Dams edited
ugu and English. It pr real cases
histories of 28 CFRDs including the highest
the
ew
world.
the
0
Freitas
C
o
e
t
in
P
o
r
t
e
s
e
esents
i
n
world.
In this conference, one of the members of the
society, Palmi Johannesson, gave a lecture about
the design, construction and performance of
Iceland’s Kárahnjúkar CFRD - the highest CFRD
built in Europe with excellent performance.
During the Second International Symposium on
Rockfill Dams, held in late October 2011 in Rio de
Janeiro and organised by the Brazilian Committee
of Dams and CHINCOLD, the International
of CFRDs updated articles on dam design
seismic ea
S
ociety
i
n
a
r
s
.
The use of the GIN method for
grouting was widely discussed and recommended
for future design of higher CFRDs.
Mexican Engineers from CFE, ass
ociated to
our organization, pr d data about La Yesca
esente
CFRD. Under construction in Mexico it is one of
the highest dams in the world incorporating
state of art in the design and construction of
type of dam.
this
Equipment for
t
r
an
s
i
t
i
on placing. La
Ye
s
c
a
CFRD México.
A recent area of discussion for the
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S
a
nb
El Cercado (130m) and Porce III (150m)
mb a.
axi (186m) in China.
International
performance of the Zipingpu CFRD. Built
chu China it was subject to an intensive
S
o
c
i
e
t
y of CFRDs has been the
breaking the slab and distressing the
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in
i
n
reinforcement bars. Analysis and observation of
the Campos Novos dam showed the critical zone
of the dam located at 30-40% of the maximum
C
o
l
o
i
S
i
an,
seismic event in May 2008 and
Bakun dam
recommendations are being applied on n
e
w
reservoir head. The correction of
phenomena has been solved by:
this
As a member of the Board of Consultants, I had
the opportunity to review, inspect and observe
designs to prevent damage to high dams subject
to seismic action.
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Increasing the rockfill modulus of
the performance of Bakun dam in Malaysia
May 2012, when the reservoir reached the
maximum height.
in
compressibility. This is obtained by selecting
well graded materials, reducing the layer
thickness for compaction, increasing the
number of passes of the vibratory roller
compactor and selecting heavier drum
An analysis of the design and construction of
the 233m high
reviewed by the society and some interesting
articles have been shared between members
produce such safe structures. General cr
Shuibuya CFRD has been
Bakun CFRD is 205m high with a volume of
compacted rockfill of almost 17Mm3. The
design of the dam follows the state of art for
structures located in a narrow valley and
preventive measures to control excessive
t
o
S
e
e
t
a
ry
weights.
Using generous amounts of water dur
spreading and rockfill compaction. (200-300 l/m³).
( >12t over the drum length).
Chen Qian is also preparing a book based on the
successful construction of the hu buya.
The CFRD International has also
worked with people involved with the design
and construction of dams and, in c unc
with pr ss ee manufacturers, have
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ing
S
i
Society
Using downstream layer thickness similar
upstream layers to avoid major differences
deformability.
to
stresses in the central compression joints were
i
n
adequately designed. The maximum
o
n
j
tion
settlement at the centre of the dam before
e
-
s
t
r
e
ed st l
September 2012