the Re p THE GOVERNMENT OF THE PHILIPPINES pp ines - JICA · 2004. 5. 11. · EM 1110-2-1901...
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THE GOVERNMENT OF THE PHILIPPINES THE DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS The Study on Sabo and Flood Control for Western River Basins of Mount Pinatubo in the Republic of the Philippines JAPAN INTERNATIONAL COOPERATION AGENCY Figure 1.7.8 Presumed Riverbed Change with Two-Dimensional Mudflow Analysis in the Sto. Tomas River VI-F23
Transcript of the Re p THE GOVERNMENT OF THE PHILIPPINES pp ines - JICA · 2004. 5. 11. · EM 1110-2-1901...
THE G
OV
ERN
MEN
T OF TH
E PHILIPPIN
ES TH
E DEPA
RTM
ENT O
F PUB
LIC W
OR
KS A
ND
HIG
HW
AY
S
The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in
the Republic of the Philippines
JAPAN IN
TERNATIO
NAL C
OO
PERATION
AGEN
CY
Figure 1.7.8 Presum
ed Riverbed C
hange w
ith Tw
o-Dim
ensional Mudflow
Analysis
in the Sto. Tom
as River
VI-F23
THE G
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ES TH
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OR
KS A
ND
HIG
HW
AY
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in
the Re public of the Philippines
JAPAN INTERN
ATIONAL C
OO
PERATION AG
ENC
Y
Figure 1.7.9 Presum
ed Riverbed C
hange after 20 Years
with O
ne-Dim
ensional Sediment T
ransport A
nalysis in the Sto. Tom
as River
VI-F24
THE G
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LIC W
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KS A
ND
HIG
HW
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in the
Re public of the Philippines
JAPAN INTERN
ATIONAL C
OO
PERATION AG
ENC
Y
Figure 1.8.1 Im
aged Perspective Draw
ing of Proposed D
ike Heightening in the B
ucao River
Future AgriculturalDevelopment Plan
Botolan Side
Baquilan River
National Road No.7
Cabangan Side
Existing Swamp
Bucao River
VI-F25
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HIG
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in the
Re public of the Philippines
JAPAN INTERN
ATIONAL C
OO
PERATION AG
ENC
Y
Figure 1.8.2 Im
aged Perspective Draw
ing of Proposed D
ike Strengthening in the Middle reaches of
the Sto. Tom
as River
Future AgriculturalDevelopment Plan
Vega Hill
Santa Fe Side
To South China See
Sto. Tomas River
San Rafael Side VI-F26
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HIG
HW
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in
the Re public of the Philippines
JAPAN IN
TERNATIO
NAL C
OO
PERATION
AGEN
CY
Figure 2.2.1 G
eneral Plan of Proposed River Im
provement
in the Bucao R
iver
VI-F27
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KS A
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HIG
HW
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in
the Re public of the Philippines
JAPAN INTERN
ATIONAL C
OO
PERATION AG
ENC
Y
Figure 2.2.2 Presum
ptive Riverbed C
hange after 20 years in the B
ucao River
VI-F28
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ES TH
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RTM
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KS A
ND
HIG
HW
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in
the Re public of the Philippines
JAPAN INTERN
ATIONAL C
OO
PERATION AG
ENC
Y
Figure 2.2.3 L
ongitudinal Profile of Proposed River
Improvem
ent in the Bucao R
iver
VI-F29
DifferentWater Depth (d)
(Landside)Design Water Level
Estimated Seepage Line
Existing Ground Level
Lahar Embankment (Dike Heightening & Strengthening)
Discharge Point
Soil Block (1)
Soil Block (2)
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.0 4.0 6.0 8.0 10.0 12.0 14.0
Different Water Depth (m)
Com
pute
d Sa
fety
Fac
tor
1: 2.0
1: 3.0
1: 4.0
1: 4.5
1: 5.0
1: 6.0
Relation Between Different Water Depth and Computed Landside Slope Failure
Estimated Soil Properties
Soil Block AverageN-Value
Unit WetWeight
Unit SaturatedWeight
UnitSubmergible
Weight
ResistantAngle Cohesion
Unit N γt (kN/m3) γsat (kN/m3) γ' (kN/m3) φ C (kN/m2)(1) 15 17.0 19.0 7.0 30.0 0.0(2) 9 16.0 18.0 6.0 27.0 0.0
THE GOVERNMENT OF THE PHILIPPINES THE DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS
The Study on Sabo and Flood Control for Western River Basins of Mount Pinatubo in
the Republic of the PhilippinesJAPAN INTERNATIONAL COOPERATION AGENCY
Figure 2.3.1 Results of Computed Landside Slope Failure
Landside Slope Gradient
VI-F30
Line-BC: Line of Seepage BoundaryLine-CD: Seepage Exit Face BoundaryPoint-C: Seepage Discharge Point
Schematic Diagram of Phreatic Surface in Dike Body
a : Length of Seepage Exit Faceq: quantity of Seepage per unit Length of Embankment
Source:EM 1110-2-1901 Seepage Analysis and Control for Dam, U.S. Army Corps of Engineers (September 1986)
THE GOVERNMENT OF THE PHILIPPINES THE DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS
The Study on Sabo and Flood Control for Western River Basins of Mount Pinatubo in
the Republic of the PhilippinesJAPAN INTERNATIONAL COOPERATION AGENCY
Figure 2.3.2 The Manner of Estimated Phreatic Surface in Dike Body
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HIG
HW
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The Study on Sabo and Flood C
ontrol for W
estern River B
asins of Mount Pinatubo in the
Re public of the Philippines
JAPAN INTERN
ATIONAL C
OO
PERATION AG
ENC
Y
Figure 2.3.3 T
ypical Cross Section of Proposed N
ew D
ike in the B
ucao River
VI-F32
