maidan dam lugeon tests before primary
TRANSCRIPT
Ground Water Depth 16.55 m Below EGL
Effective Ground Water Depth 16.55 m Below EGL
L, Open Section Length 5.00 m
Center Section Depth 18.50 m Below EGL
Bottom Section Depth 21.00 m Below EGL
Upper Section Depth 16.00 m Below EGL
Gauge Height 0.8 m Above EGL
P0, Reference Pressure 1 MPa
2 62.3 37.35 33.43 97.7 47.35 41.34 132.7 57.35 46.33 131.5 47.35 55.52 102.4 37.35 54.8
Gauge Pressure [bar]q, Flow
[liter/min]
P, Total head
[meters]
Lugeon [ (q / L )/(P / 100m)]
Interpretation Houlzby, 1976: Wash‐Out
Maidan DamLugeon Test InterpretationTender No 14/2015 - Construction of Recharge Dam at Wadi Al-Maidan Al
Mudhaibi, North Sharqiyah Governorate
BH 01 ‐ Test No. 1
Manual Input Wash‐Out
Description:
Lowest Lugeon value recorded, corresponding either to low or medium water
pressures (1st, 2nd, 4th, 5th stage)
11.01.2017
Please note that some hydro‐jacking may occur since the test might be
interpreted as Dilation as well
Maidan Dam
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
1 2 3 4 5
Lugeon (Lu or l/s/min under 100m)
Total H
ead (m)
Period (Steps)Total Head Applied Obtained Lugeon
0.0 10.0 20.0 30.0 40.0 50.0 60.0
1
2
3
Lugeon
S
t
e
Lugeon Value (Houlsby, 1976): 55.54
Hydraulic conductivities increase as the test proceeds, regardless of the
changes observed in water pressure. This behavior indicates that seepage
induces permanent and irrecoverable damage on the rock mass, usually due to
infillings wash out and/or permanent rock movements.
Highest Lugeon value recorded (5th stage)
Equivalent Permeability (m/sec): 7.22E‐06
Core Boxe Picture
from 16.00 ‐ 21.00 m: Highly Fractured and
moderately weathered GABBRO/PERIDOTITE with
shear seams. Fractures filled with magnesite and
veins of sheared serpentinite
T
e
s
t
1
4
5
p
0
5
10
15
20
25
30
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Flow loss, q/L
Pressure Factor, P/P0
1 Lugeon
5 Lugeon
15 Lugeons
50 Lugeons
100 Lugeons
Lugeon
MINISTRY OF REGIONALMINISTRY OF REGIONALMUNICIPALITIES AND WATER
RESOURCES
Ground Water Depth 16.55 m Below EGL
Effective Ground Water Depth 16.55 m Below EGL
L, Open Section Length 5.00 m
Center Section Depth 23.50 m Below EGL
Bottom Section Depth 26.00 m Below EGL
Upper Section Depth 21.00 m Below EGL
Gauge Height 0.8 m Above EGL
P0, Reference Pressure 1 MPa
2.6 45.6 43.35 21.03.9 83.2 56.35 29.55.2 115 69.35 33.23.9 94.3 56.35 33.52.6 71.6 43.35 33.0
Gauge Pressure [bar]q, Flow
[liter/min]
P, Total head
[meters]
Interpretation Houlzby, 1976: Wash‐Out
Tender No 14/2015 - Construction of Recharge Dam at Wadi Al-Maidan Al Mudhaibi, North Sharqiyah Governorate
Maidan Dam
11.01.2017
BH 01 ‐ Test No. 2
Manual Input Wash‐Out
Lowest Lugeon value recorded, corresponding either to low or medium water
pressures (1st, 2nd, 4th, 5th stage)
Description:
Lugeon Test Interpretation
Please note that some hydro‐jacking may occur since the test might be
interpreted as Dilation as well
Lugeon [ (q / L )/(P / 100m)]
Maidan Dam
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
1 2 3 4 5
Lugeon (Lu or l/s/min under 100m)
Total H
ead (m)
Period (Steps)Total Head Applied Obtained Lugeon
0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0
1
2
3
Lugeon
S
t
e
T
e
s
t
2
Highest Lugeon value recorded (5th stage)
Equivalent Permeability (m/sec):
Lugeon Value (Houlsby, 1976): 33.47
Hydraulic conductivities increase as the test proceeds, regardless of the
changes observed in water pressure. This behavior indicates that seepage
induces permanent and irrecoverable damage on the rock mass, usually due to
infillings wash out and/or permanent rock movements.
4.35E‐06
Core Boxe Picturefrom 21.00 ‐ 26.00 m: Locally Highly Fractured and
slighlty weathered GABBRO/PERIDOTITE
4
5
p
0
5
10
15
20
25
30
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Flow loss, q/L
Pressure Factor, P/P0
1 Lugeon
5 Lugeon
15 Lugeons
50 Lugeons
100 Lugeons
Lugeon
MINISTRY OF REGIONALMINISTRY OF REGIONALMUNICIPALITIES AND WATER
RESOURCES
Ground Water Depth 16.55 m Below EGL
Effective Ground Water Depth 16.55 m Below EGL
L, Open Section Length 4.00 m
Center Section Depth 28.00 m Below EGL
Bottom Section Depth 30.00 m Below EGL
Upper Section Depth 26.00 m Below EGL
Gauge Height 0.8 m Above EGL
P0, Reference Pressure 1 MPa
3.3 2.97 50.35 1.474.9 35.6 66.35 13.416.5 63 82.35 19.134.9 69.3 66.35 26.113.3 39.7 50.35 19.71
Interpretation Houlzby, 1976: Wash‐Out
Tender No 14/2015 - Construction of Recharge Dam at Wadi Al-Maidan Al Mudhaibi, North Sharqiyah Governorate
Maidan Dam
11.01.2017
Manual Input Wash‐Out
Lowest Lugeon value recorded, corresponding either to low or medium water
pressures (1st, 2nd, 4th, 5th stage)
Description:
Lugeon Test Interpretation
Please note that some hydro‐jacking may occur since the test might be
interpreted as Dilation as well
Gauge Pressure [bar]q, Flow
[liter/min]
P, Total head
[meters]
Lugeon [ (q / L )/(P / 100m)]
BH 01 ‐ Test No. 3
Maidan Dam
0.00
5.00
10.00
15.00
20.00
25.00
30.00
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
1 2 3 4 5
Lugeon (Lu or l/s/min under 100m)
Total H
ead (m)
Period (Steps)Total Head Applied Obtained Lugeon
0.00 5.00 10.00 15.00 20.00 25.00 30.00
1
2
3
Lugeon
S
t
e
T
e
s
t
3
Highest Lugeon value recorded (5th stage)
from 26.00 ‐ 30.00 m: Slighlty weathered
GABBRO/PERIDOTITE. Closely to Medium Spaced
joints (60 to 600 mm, F4 ‐ F3).
Equivalent Permeability (m/sec): 3.39E‐06
Lugeon Value (Houlsby, 1976): 26.11
Hydraulic conductivities increase as the test proceeds, regardless of the
changes observed in water pressure. This behavior indicates that seepage
induces permanent and irrecoverable damage on the rock mass, usually due to
infillings wash out and/or permanent rock movements.
4
5
p
0
5
10
15
20
25
0 0.2 0.4 0.6 0.8
Flow loss, q/L
Pressure Factor, P/P0
1 Lugeon
5 Lugeon
15 Lugeons
50 Lugeons
100 Lugeons
Lugeon
MINISTRY OF REGIONALMINISTRY OF REGIONALMUNICIPALITIES AND WATER
RESOURCES