26 June 2012 Korea Rural Research Institute Gun Heo.
-
Upload
macy-usilton -
Category
Documents
-
view
215 -
download
1
Transcript of 26 June 2012 Korea Rural Research Institute Gun Heo.
![Page 1: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/1.jpg)
26 June 2012
Korea Rural Research Institute
Gun Heo
![Page 2: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/2.jpg)
Piezometer Installation
IntroductionII
ConclusionsVV
ContentsContents
In-situ ExperimentsIIII
Results and Discussion
IIIIII
IVIV
- Borehole Image Processing System (BIPS)
- In-Situ permeability test
![Page 3: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/3.jpg)
Background & PurposeBackground & Purpose
• Seawater Blocking
• Securing fresh water
• Development Internal
Purpose of Seadike
• The riprap-bottom layer connects
both
seaside and lakeside, so permeable
• Reclaimed with dredged sands
Construction Condition ofthe Final Closing Section
• Piping and Erosion Embankment
• Desalination delay due to
excessive infiltration
were Concerned
Evaluate the status of riprap layer
Establish a long-term monitoring plan
Evaluate the status of riprap layer
Establish a long-term monitoring plan
Determine whether need reinforcement
Effective Safety management seadike
Determine whether need reinforcement
Effective Safety management seadike
Dredged SandsDredged Sands
Riprap Bottom LayerRiprap Bottom Layer
![Page 4: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/4.jpg)
Outline
To evaluate the Filling Status
Filling Status
To evaluate the Permeation
Permeation
To measure the Pore Pressure
Installation PiezometerItems
Borehole Image Processing System (BIPS)
In-situ Permeability test Installation Piezometers and Building Monitoring System(Automated)
Visually check the Filling Status of the Bottom Layer.
Comparison the degree of
permeability
(General / Final closing)
Long-term Monitoring ⇒ Evaluate the temporal variation of Filling Status ⇒Propose Criteria for Monitoring
Purpose
Detailed Task
Utilization
• Determine whether need
reinforcement
• Safety Management
• Determine whether need
reinforcement
• Safety Management
Field test results + Data measured
• Evaluated Current state of the filling
& temporal variation of Filling Status
• Proposed Criteria for Monitoring
![Page 5: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/5.jpg)
Bottom Protection Layer of the Final Closing SectionBottom Protection Layer of the Final Closing Section
< General Section > < Final Closing Section L = 1.8 km > < General Section>
To find the most vulnerable sections…
![Page 6: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/6.jpg)
Electrical Resistivity ResultsElectrical Resistivity Results
electrical resistivity results of No. 59+60~No. 62+35 (5m electrode gap)electrical resistivity results of No. 59+60~No. 62+35 (5m electrode gap)
BelowBelow
Above Above
No. 60+25 Relatively low resistivity and showing the continuity sections No. 60+25 Relatively low resistivity and showing the continuity sections
![Page 7: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/7.jpg)
Selected Sections(3 Final Closing Sections, 1 General Section)Selected Sections(3 Final Closing Sections, 1 General Section)
<Final Closing> No. 60 + 25
<Final Closing> No. 65 + 00
<Final Closing> No. 69 + 80
<General> No. 82 + 00
![Page 8: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/8.jpg)
BIPS (Borehole Image Processing System)BIPS (Borehole Image Processing System)
BIPSBIPS
• To decipher the filling degree of the bottom layer
No of
HallsLocation Focused
4Near the
PiezometerRiprap
Bottom Layer
•Top (13.9m)
•Dredged Sands
•Riprap
• Riprap
• Dredged Sands
• Bottom (17.1m)
Results
![Page 9: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/9.jpg)
In-situ Permeability testIn-situ Permeability test
Permeability TestPermeability Test ResultsResults
To compare the differences in permeability coefficients Number Location Test Section
Permeability
Coefficient k(cm/s)Remarks
BH-1 60+25Embankment 1.48×10-3
Final Closing Section
Bottom Layer 3.25×10-3
BH-2 65+00Embankment 2.38×10-3
Bottom Layer 2.29×10-3
BH-3 69+80Embankment 9.41×10-4
Bottom Layer 2.09×10-3
BH-4 82+00Embankment 1.25×10-4
General SectionBottom Layer 9.17×10-4
<Embankment/Bottom Layer> <General/Final Closing>
The differences are not significant
No of
HallsLocation Focused
4Near the
PiezometerRiprap Bottom
Layer
Casing
![Page 10: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/10.jpg)
Installation PiezometersInstallation Piezometers
10
PiezometerPiezometer Cross-SectionalCross-Sectional
I General Section
3 Final Sections
Location
Piezometer
Items
• Automated measurement system
has been built for four-sections
• By measuring the pore pressure,
Compare those between general
section and Final closing sections,
evaluate the filling status of the
bottom layer
• In addition, by conducting long-term
monitoring , evaluate the safety of
seadike with hydraulic head loss ratio
• Arranged piezometers to compare the pore pressure of each
section
(between the final closing section and normal section)
• Arranged piezometers to compare the pore pressure of each point
• (between P1 and P3, P3 and P7)
• 4 piezometers in bottom protection layer (P-1,3,5,7)
• 4 piezometers in embankment (P-2,4,6,8)
CL
18.60
4.50
14.10
18.50
4.00
14.50
13.60
5.00
8.60
13.00
4.00
9.00
21.20
4.50
16.70
15.00
5.00
10.00
CLCL
CLCL
20.00 20.00 21.50
16.40
5.10
9.07
4.70
13.80P- 2
EL(+)5.25EL(+)3.88
EL(-)10.06
EL(-)5.56
EL(-)8.86
EL(-)10.64
EL(-)5.54
EL(-)9.14 EL(-)9.75 EL(-)9.89
EL(-)4.75 EL(-)5.19
EL(+)11.18 EL(+)10.91
EL(+)5.47EL(+)3.73
EL(-)7.42 EL(-)7.59EL(-)8.13 EL(-)9.27
EL(-)2.92 EL(-)3.59 EL(-)3.13
EL(-)5.27
W- 1 W- 2
P- 1P- 3
P- 3
P- 4
P- 4
P- 5
P- 5
P- 6
P- 6
P- 7
P- 7
P- 8
P- 8
P- 1
P- 2
![Page 11: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/11.jpg)
Monitoring ProgramMonitoring Program
방조제평면도
상단메뉴
계측단면도
최근계측데이터실시간표시
수두손실율그래프 간극수압그래프
경고표출범례
범례 및계측요약
Floor plan
Menu Bar
Cross-section
Hydraulic Head Loss Ratio Pore pressure
Legend
Measured Value
![Page 12: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/12.jpg)
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
센서 측정 테스트
Measurement Results No.60+25(Final Closing section)Measurement Results No.60+25(Final Closing section)
P1P1 P3P3
P5P5 P7P7
• Pore pressure changes due to tidal fluctuations that are quite stable
• From sea side to the lake side, the changes in pore pressure gradually decreases
Time(day) Time(day)
Time(day) Time(day)
![Page 13: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/13.jpg)
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
Measurement Results No.65+00(Final Closing section)Measurement Results No.65+00(Final Closing section)
P1P1 P3P3
P5P5 P7P7
• Pore pressure changes due to tidal fluctuations that are stable
• From the sea side to the lake side, the changes in pore pressure gradually decreases
Time(day) Time(day)
Time(day) Time(day)
![Page 14: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/14.jpg)
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
Measurement Results No.69+80(Final Closing section)Measurement Results No.69+80(Final Closing section)
P1P1 P3P3
P5P5 P7P7
• Pore pressure changes due to tidal fluctuations that are stable
• From the sea side to the lake side, the changes in pore pressure gradually decreases
Time(day) Time(day)
Time(day) Time(day)
![Page 15: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/15.jpg)
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.2
0.4
0.6
0.8
1.0
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
간극수압
(kg
/)
간극
수압
㎠
0.0
0.3
0.6
0.9
1.2
1.5
2011-09-10 2011-09-17 2011-09-24 2011-10-01 2011-10-08 2011-10-15
Measurement Results No.82+00(General section)Measurement Results No.82+00(General section)
P1P1 P3P3
P5P5 P7P7
• Pore pressure changes due to tidal fluctuations that are stable
• From the sea side to the lake side, the changes in pore pressure gradually decreases
• General section shows a smaller value than final closing section.
Time(day) Time(day)
Time(day) Time(day)
![Page 16: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/16.jpg)
Building Monitoring SystemBuilding Monitoring System
• Installation Piezometer
- 3 on the final closing sections(No.60+25, No.65+00, No.69+80)
- 1 on the general section(No.82+00)
- 8 Piezometers are installed on each section
• Monitoring Program
- Express the results and Monitor for long-term
• Installation Piezometer
- 3 on the final closing sections(No.60+25, No.65+00, No.69+80)
- 1 on the general section(No.82+00)
- 8 Piezometers are installed on each section
• Monitoring Program
- Express the results and Monitor for long-term
SummarySummary
• Every piezometer is operating properly
• Reliable pore pressure data are being collected
• Sea-side : Large Fluctuation, Lake-side : Small Fluctuation
• Every piezometer is operating properly
• Reliable pore pressure data are being collected
• Sea-side : Large Fluctuation, Lake-side : Small Fluctuation
![Page 17: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/17.jpg)
Hydraulic Head Loss RatioHydraulic Head Loss Ratio
Hydraulic Head Loss RatioHydraulic Head Loss RatioTide/Pore pressure HeadTide/Pore pressure Head
1
21
P
PP
H
HHa
• a : Hydraulic Head Loss Ratio
• ΔHp1,2 : changes of pore pressure head at P1, P2
• “a” has the value of 0~1
• when a=0, ΔHp1 = ΔHp2,
• a=1, ΔHp2 = 0 ← NOT affected by tide at all
P1=tide level EL(m)
P1
-P2
EL(
m)
R2=Coefficient of determination
• The value of 0~1
• Closer to 0, Unstable
• Closer to 1, stable
Time (day)
Tide (m)Pore pressure head (m)
• Overlapped two graphs.
• Gray : tide level
• Black : Pore pressure Head of somewhere inside the structure which is affected by tide
• but, depends on the position and the time, the ranges of pore pressure will be changed
• Hard to set a criteria
Criteria(?)Criteria(?)
P1 P2
해측
내측내측제체
Sea-side
inner-sideembankment
Hydraulic Head Loss RatioHydraulic Head Loss Ratio
![Page 18: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/18.jpg)
Hydraulic Head Loss RatioHydraulic Head Loss Ratio
Changes of TrendsChanges of Trends
Upward(Enlarged Head Difference)
Downward(Lessened Head Difference)
degree of dispersion(Change of the Infiltration Path)
Changes of inclination
![Page 19: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/19.jpg)
Evaluation by Hydraulic Head Loss Ratio (No.60+25)Evaluation by Hydraulic Head Loss Ratio (No.60+25)
Bottom Protection LayerBottom Protection Layer EmbankmentEmbankment
• At P1, a = 0.228 R2= 0.931,
Blocking the water looks worse,
but the behavior is stable
• At P7, a = 0.972 R2= 0.997
Closer to the Lake-side, values
getting higher
•At P2, a = 0.289 R2= 0.935,
Blocking the water looks worse,
but the behavior is stable
• At P8, a = 0.972 R2= 0.993
Closer to Lake-side, a value
becomes higher
a R2 a R2
With the Hydraulic Head Loss RatioWith the Hydraulic Head Loss Ratio
![Page 20: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/20.jpg)
Evaluation by Hydraulic Head Loss Ratio (No.65+00)Evaluation by Hydraulic Head Loss Ratio (No.65+00)
Bottom Protection LayerBottom Protection Layer EmbankmentEmbankment
• At P1, a = 0.312 R2= 0.950,
Blocking the water looks worse,
but the behavior is stable
• At P7, a = 0.917 R2= 0.997
Closer to Lake-side, a value
becomes higher
• At P2, a = 0.508 R2= 0.974,
Blocking the water looks worse,
but the behavior is stable
• At P8, a = 0.961 R2= 0.998
Closer to Lake-side, a value
becomes higher
aR2 a R2
![Page 21: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/21.jpg)
Evaluation by Hydraulic Head Loss Ratio (No.69+80)Evaluation by Hydraulic Head Loss Ratio (No.69+80)
Bottom Protection LayerBottom Protection Layer EmbankmentEmbankment
• At P1, a = 0.203 R2= 0.873
Closer to sea-side, Blocking the
water looks worse, but the
behavior is stable
• At P7, a = 0.855 R2= 0.991
Closer to Lake-side, a value
becomes higher
• At P2, a = 0.267 R2= 0.867
Closer to sea-side, Blocking the
water looks worse, but the
behavior is stable
• At P8, a = 0.957 R2= 0.997
Closer to Lake-side, a value
becomes higher
aR2 a R2
![Page 22: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/22.jpg)
Evaluation by Hydraulic Head Loss Ratio (No.82+00)Evaluation by Hydraulic Head Loss Ratio (No.82+00)
Bottom Protection LayerBottom Protection Layer EmbankmentEmbankment
• At P1, a = 0.295 R2= 0.937
Closer to sea-side, Blocking the
water looks worse, but the
behavior is stable
• At P7, a = 0.979 R2= 0.997
Closer to Lake-side, a value
becomes higher
• At P2, a = 0.671 R2=0.993
Even though it closes to sea-side
“a” value is relatively higher than
the Final closing section’s
• At P8, a = 0.984 R2= 0.999
Closer to Lake-side, a value
becomes higher
a R2a
R2
![Page 23: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/23.jpg)
SummarySummary
LocationP1 P3 P5 P7
a R2 a R2 a R2 a R2
No.60+25 0.2279 0.931 0.6899 0.978 0.9211 0.998 0.9722 0.997
No.65+00 0.3121 0.950 0.5111 0.924 0.6348 0.988 0.9169 0.997
No.69+80 0.2033 0.873 0.4448 0.924 0.7081 0.989 0.8549 0.991
No.82+00 0.2945 0.937 0.7458 0.993 0.9314 0.999 0.9788 0.997
- Sea-side (P-1,3) : Blocking the water looks Bad, but the behavior is stable - Lake-side(P-5,7)
: Blocking the water looks Good, and the behavior is stable
- Blocking the water of the general section is Good, but the final closing sections also
show a stable behavior
- Reinforcement does not require now at the final closing section, however, need to
monitor constantly
- Sea-side (P-1,3) : Blocking the water looks Bad, but the behavior is stable - Lake-side(P-5,7)
: Blocking the water looks Good, and the behavior is stable
- Blocking the water of the general section is Good, but the final closing sections also
show a stable behavior
- Reinforcement does not require now at the final closing section, however, need to
monitor constantly
![Page 24: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/24.jpg)
Criteria(Ⅰ)Criteria(Ⅰ)
Statistical MethodsStatistical Methods
• Three times the standard deviation
were set to the criteria
• By setting the criteria,
we could measure
- Abnormal data
- Upward mobility of trend lines
- Downward mobility of trend lines
- Changes of trend line inclination
• After long-term monitoring, we will
- Review the adequacy of 3σ
as criteria
- Set the check-list in case of
odd behavior
Regression and 3-sigma Graph
Tide(m)
Criteria (-3σ)
Criteria (+3σ)
P1-P2(m)
Criteria suitable for long-term MonitoringCriteria suitable for long-term Monitoring
![Page 25: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/25.jpg)
Examples of setting Criteria(Ⅰ) No.60+25Examples of setting Criteria(Ⅰ) No.60+25
P1P1 P3P3
P5P5 P7P7
![Page 26: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/26.jpg)
Criteria(Ⅱ)Criteria(Ⅱ)
Criteria based on the change of Hydraulic Head Loss RatioCriteria based on the change of Hydraulic Head Loss Ratio
![Page 27: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/27.jpg)
Criteria(Ⅱ)Criteria(Ⅱ)
• By plotting the daily values,
can predict changes of hydraulic
head loss ratio
Suitable for
long-term monitoring
Criteria based on the change of Hydraulic Head Loss RatioCriteria based on the change of Hydraulic Head Loss Ratio
Hydraulic H
ead Loss Ratio
![Page 28: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/28.jpg)
Section SelectSection Select
• 3 on the Final Closing Section (No. 60+25, No. 65+00, No. 69+80)
• 1 on the General Section (No. 82+00)
• 3 on the Final Closing Section (No. 60+25, No. 65+00, No. 69+80)
• 1 on the General Section (No. 82+00)
In-situ ExperimentsIn-situ Experiments
• BIPS
: The gap was deemed to have been filled with the dredged sands
• In-situ permeability test : comparison of the permeability coefficient - Bottom protection layer / Embankment - General / Final Closing Section Difference is not large
• BIPS
: The gap was deemed to have been filled with the dredged sands
• In-situ permeability test : comparison of the permeability coefficient - Bottom protection layer / Embankment - General / Final Closing Section Difference is not large
ConclusionsConclusions
![Page 29: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/29.jpg)
Building the Monitoring SystemBuilding the Monitoring System
• Every piezometer is operating properly
• Evaluated the infiltration charcteristic by Hydraulic Head Loss Ratio
- Sea-side (P-1,3) : Blocking the water looks Bad, but the behavior is stable - Lake-side(P-5,7)
: Blocking the water looks Good, and the behavior is stable until now, evaluated need not reinforcement, but we will follow up the trend
• Suggested 2 Methods for Long-term Monitoring
- Criteria Based on Statistical Method
(Review the adequacy of 3σ by long-term monitoring) - Criteria based on the change of Hydraulic Head Loss Ratio (By the regression equation of trend line)
• Every piezometer is operating properly
• Evaluated the infiltration charcteristic by Hydraulic Head Loss Ratio
- Sea-side (P-1,3) : Blocking the water looks Bad, but the behavior is stable - Lake-side(P-5,7)
: Blocking the water looks Good, and the behavior is stable until now, evaluated need not reinforcement, but we will follow up the trend
• Suggested 2 Methods for Long-term Monitoring
- Criteria Based on Statistical Method
(Review the adequacy of 3σ by long-term monitoring) - Criteria based on the change of Hydraulic Head Loss Ratio (By the regression equation of trend line)
![Page 30: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/30.jpg)
ApplicationsApplications
• Verify the stability of the sea-dike of the final closing section
• Monitoring technology for seawater intrusion were secured
• Methods for the structures affected by the tide were presented
• Verify the stability of the sea-dike of the final closing section
• Monitoring technology for seawater intrusion were secured
• Methods for the structures affected by the tide were presented
![Page 31: 26 June 2012 Korea Rural Research Institute Gun Heo.](https://reader030.fdocuments.net/reader030/viewer/2022032702/56649cb75503460f9497d284/html5/thumbnails/31.jpg)
Thank you very much!!