Japanese National Committee on Large Dams. Dams in Japan, No. 10
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60.
SHINTSTIRT]KO
DAM
Location
Nearest
City
.
River
Purpose
Catchment
area
Mean
annual
discharge
Years
of
construction
.
Type
Foundation
Height
Crest
length
Volume
Spillway
Type
Type
and
number
of
gate
Maximum
discharge
capacity
Reservoir
Gross
capacity
Effective
capacity
.....:.
Area
Drawdown
range
Owner
Engineering
by
Construction
by
Obanazawa-shi,
Yamagata-ken
Yamagata-shi
Ny[
Irrigation
56.0km'?
2,600mr/s
re77-(re86)
Rockfill
Andesite
and Tuff Breccia
96m
284m
2,900,000m3
Uncontrolled
1,100m3/s
31.5X 106m3
29.8x 106m3
1.3km'
51m
Ministry
of Agriculture,
Forestry
and
Fisheries
Ditto
J. V. of Maeda construction
Co., Ltd.
and Tobishima
Corp.
a<
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T.
166
PLAN
The
Shintsuruko dam
is a rockfill
dam with a
center
impervious
zone. The
geology
of the
dam site
consists
of
Miocene Andesite, Pyroclastic Andesite
and Tuff Breccia,
which
are
partially
overlain by Tuff or Lappilli
Tuff.
From
the dynamic
stability analysis
it was recognized
that
the top
of the dam
would fairly shake by seismic
accelem-
tion, compared with other
lower dams. That
is often
observed
in such
dams about 1.00m high. So,
zoning
was designed
to strengthen
the upper
palt
of the dam
by filling with
rock material
as
much as
possible
except
the imPervious
zone.
ThJ rock is transported
ftom a quary located
2km upstream
and is utilized
for rock and transition
zones.
A
part
of
that is
used to manufacture
qushed
rock as the material
of
the
filter zone.
The core zone is filled
with river
deposit avail-
able in the teuace about 0.5km
downstream.
As for the foundation
treatment, curtain
grouting and
blanket
grouting are carried out
for the bedrock
of the
core
zone. The former is designed 45m
deep in maximum
and
the latter
is uniformly
15m deep.
Q
r-*.r-rr*
@
h6par
h,oLrery
@*-
6t t''t'o
"
NwLf!
3@5g
Nwt
@
Rock(Tronsition)
@
Rocx
Rz
e
noct
Rt
@
niprop
@
Blontet
grouting
@
curtoin
grouting
I
',J
sq
l\E
VI
\j-\3'
/:\
\v
TYPICAL
CROSS
SECTION
o.______:P_
rgo
(R)
/r l
\L/
*1
i
--l
I
I
r9
I
,,/
,/,
Inspecllon
Gol lery
o ro 20
3o4p
Spill woy
FROFILE ALONG
DAM
AXIS
Diversion
Tunnel
161
6I
.
TAKAMI
DAM
Location
Nearest
City
.
River
Purpose
Catchment
area
Mean
annual
discharge
Years
of
construction
Type
Foundation
Height
Crest
length
Volume
Spillway
Type
Type
and
number
of
gate
.
Maximum
discharge
capacity
Reservoir
Gross
capacity
Effective
capacity
Area
Drawdown
range
Owner
Engineering
by
Construction
by
S;Z
_-
____.__
.a
Shizunai-cho,
Shizunai-gun,
Hokkaido
Tomakomai
Shizunai
Flood
control and
Hvdroelectric
283km'?
22.4m3lsec
197&-1983
Rockfill
Schalstein
120m
435m
4,962,000m3
Uncontrolled
2,400m3/sec
229
x
106m3
1.49x
106m3
6.8km'
30m
The
Hokkaido Electric Power Co.,
Inc.
Ditto
J. V.
of Kajima Corporation,
Aoki
Construction
Kogyo
Co., Ltd.
Co.. I-td. and
Chizaki
N?
&-
168
PLAN
Takami
Dam is a rockfill
embankment with
a central
earth
core and a chute type
side overflow spillway. It is a multi-
purpose
dam
which
provides
flood control
for the Shizunai
River
and forms the upper
reservoir
of Takami
pumped-storage
power
station (installed
capacity of 2m MW).
The
dam
site is an asymmetdcal
valley, the left bank is steep, the middle
right bank is
overburdened with river terace
deposits.
Therefore,
a layer of
soft contact clay and fine contact core is
plac€d
between
the core
matorial and the founda-
tion
rock, in
order to
prevent
shear failure
and
differential settlement.
-
The foundation
rock
mainly consists
of schalstein and
has
sufficient bearing strength
as the foundation
of the rockfill
oetm.
Regarding
foundation treatment,
blanket
grouting (1-3m
deep) was executed
in the
bottom of core zone, also curtain
grouting
and consolidation
grouting
were
executed from
the inspection
gallery.
TYPICAL
CROSS SECTION
'rr,roo
! \con.olidcr;o
\.*
PROFILE
ALONG
DAM
AXIS
I
'/z,soo
O Ow
169
62.
TAMAGAI4{A
DAM
Location
Nearest
City
.
River
Purpose
Owner
Engineering
by
Construction
by
/
Tazawako-cho,
Senboku-gun,
Akita-ken
Omagari-shi
lama
Flood control, Maintenance
of normal
function
of
the river water,
Irriga-
tion,
Water supply
and
Hydroelectric
Catchment
area
287
km,
Mean
annual
discharge
2l.Zm3ls
Years
of
construction
1973--(1987)
TYpe
Gravity
Foundation
welded
tuff, Basalt
and ruff
breccia
Height
100m
Crest
length
43Zm
Volume
l,loo,ooom3
Spillway
TYPe
Controlled
Typ"
and
number
of
gate
.
Crest radial
gateX4,
Orifice
radial gate X
1
and
Conduit
ra6ial
gateX2
Maximum
discharge
capacity
3,500m3/s
Reservoir
Gross
capacity
254x106rn3
Effective
capacity
2Z9x10En3
Area
8.3kmt
Drawdown
range
48.7m
Ministry
of Construction
Ditto
J. v. of
Kajima
corp.,
okumura
corporation
and
chizaki
Kogyo
co.,
Ltd.
- -
Tamagawa
Dam
is a conqete gravity
dam
being constructed
on the
Tama
River,
the
largest
tributary
of the Omono
River
by Ministry
of Construction.
The foundation
rock
of the dam
consists
of welded
tui, basalt
and
tuff breccia in
Tertiary.
The
dam
is constructed
by
(RCD
Method).
Combination
of the
incline
.y.t"-
"rJ'ar-p
iricks for horizontal
bring
the remarkable
rise
of conqete
Ptacement
rate
and reduction
of manpowers
compared
with
the
mventional
mnstruc-
tion.method.
concrete
placement
using
maximum
aggegate size of
150
mm was proved
to be
saiisla;ory
after a large
number
of field
experimelts.
concrete placement
of
the dam began in
september
rbas
ana wi[
ue
finiJed in
1986.
- .-.T"
d-u"l
conveys
strong
acid water gushed
from the
spa of Tamagawa
(pH:1.1).
so
ttre neuiiaflzation
treatment
facilities
v/ill
be
constructed
for
water utilization,
and
preveniation
of deierioration
of d"-
con"r","
*J o,ner
facilities.
rn
qc-sf]=4s!-!:9
L=6lO
&-
170
p0
PLAN
o 50 too
t5om
EL
(m)
TJPSTREAM
VIEW
63.
TENZAI\
DAM
Location
Nearest
City
.
River
Purpose
Catchment
area
Mean
annual
discharge
Yedrs
of
construction
Type
Foundation
Height
Crest
length
Volume
Spillway
Type
Type
and
number
of
gate
.
Maximum
discharge
capacity
Reservoir
Gross
capacity
Effective
capacity
Area
Drawdown
range
Owner
Engineering
by
Construction
by
Kyuragi-cho,
Higashimatsuura-gun,
Saga-ken
Taku-shi
Tenzan
River, tributary
of Rokkaku
River
Hydroelectric
0.76km'
0.05m3/s
1979-(1985)
Under Construction
Rockfill
Crystalline
schist
69.0m
380.0m
1,550,000m,
Uncontrolled
spillway
51m3is
3.3X 101n3
3X 106m3
0.14km'
30m
The Kyushu Electric
Power
Co.,
Ditto
J. V. of Kajima
Corporation
and
Inc.
Aoki
Construction
Co., Ltd.
|3
\- /\\
r--\\-/^,\
-
^l-{'\*
.- t
)/
(
..-
,'1'l:-
/r\7
820m
772
PROFILE
ALONG
DAM
AXIS
GroJl
cudoin
+
NwL
zt90
-.+-!ry!
TYPICAL
CROSS SECTION
-^^-tl-t
Dam
ceates
the upper
rcsewoir
of Tenzan Pumped
Storage
Hydroelectric
Plant
of
maximum output of
{-YW'.
Il is
planned
to
generate
for six houn
at the rated output
ot
6OOUW, so
the required
active storage
capicity i,
3'm0'000nf.
The geology
of the dam
site
consists of crystatline
schist, and
its topograptry
is very
stcep and narrow.
The
:t9118:
caPacity
by construction
of
69m
high dam is
only about 1,000,000m'.
Theretore,
the active
storage capacity
3,000'000m1
must be
excavated around
the reservoir,
then the longest
cut slope
reaches
about
imm
tengfl.
Total
excavation
amounts
to
about 6,000,000m',
and of this volume
1,500,000m.
is
used for
dam coistruction
materials,
the
rest
must
be caried
out
of the reservoir
to sooil bank.
Another
characteristic
of Tenzan
Reservoir
is the rapid drawdown
of sn/hr.
O
Orrginol
qround
surfoce
@
Excowtion
line
@
Inspection
gollery
@
cote
@
Fitter
a
@
rlra B
@
noct
@
mprop
O
Curtoin
grwt
173
64.
TOKACHI
DAM
Location
Nearest
City
...
River
Purpose
Catchment
area
Mean
annual
discharge
Years
of
construction
Type
Foundation
Height
Crest
length
Volume
Spillway
Type
Type
and
number
of
gate
.
Maximum
discharge
capacity
Reservoir
Gross
capacity
Effective
capacity
Area
Drawdown
range
Owner
Engineering
by
Construction
by
Shintoku-cho,
Kamikawa-gun,
Hokkaido
Obihiro-shi
Tokachi
Flood
control
and
Hydroelectric
592km2
36m3/s
1e73-(re84)
Rockfill
Keratophyre,
Slate,
Schalstein
and Diabase
84m
443m
3,724,000m3
Controlled
Crest radial gateXZ
2,600m34
L12x101n3
88
X
106rn3
4.2km'
31.Lm
Hokkaido
Development
Bureau
Ditto
J. v.
of raisei
corp.,
Kajima
corp.
and
lto-Gumi
construction
co.,
Ltd.
Tokachi
dam
is
a rocKill
dam with
center
core
being
constructed in
the Tokachi
River.
The
dam
site is a wide
*U,,
shaped
vallery
and
the
foundation
of
the dam
in left
abitment
consists
of slate
and schalstein
-O
rr""
irre faults. These
faults
were
replaced
by concrete.
. -
To
discharge
large
amount
of flood
flow
safely the spillway
and tlle
outlets
are large
in
size. The
spillway is
equipped
with
two
radial gaters
of 13m high
and
15m wide
and thioutleis
with
high
pressure
sta? gatei
ot :.i-
ntli
"oa
z.+* *ia".
o
2@h
:\----'a
'
\\)'\)
.
''9-----.-.\
*{'..-
/
.-
Tokochi
Riv€r
174
((
PLAN
7
/{
350
e
(HW.LtEL3rlo.o
3/.0
t_--
_
_
t30
320
3r0
3oo
?90i
2E0
270
260
O
Ercovorion Line
@
tnspecrion Gollery
@
cor"
@
ritre.
@
nocr
@
niproo
O
curroin Grouring
@
atonxet Grouling
TYPICAL
CROSS
SECTION
Orlginol Gromd Sudfte
tii lllrr
-Jir
tlli
ULJU
L75
'=.-.'-
L.lv
L=
3Og
9
PROFILE
ALONG
DAM
AXIS