Post on 24-Jun-2020
Deep Ground Improvement by Controlled Modulus
Columns (CMC) and Prefabricated Vertical Drains (PVD)
Future Fuel Terminal
Tuxpan, Veracruz, México
1
TC211 Workshop
Cancún 2019
www.menard.com.mx / www.menard-group.com(52) 55 5241 1108 / menard@menard.com.mx
Contents
01 Project
02 Design
03 Execution
04 QA/QC
Project
01
www.menard.com.mx / www.menard-group.com(52) 55 5241 1108 / menard@menard.com.mx
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Deep Ground Improvement by CMC and PVD
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Deep Ground Improvement by CMC and PVD
Scope:
➢ Landfill of 3m thick (113,000m2), distributed load 50 kPa
➢ Foundation of 11 tanks, diameter 43m, applying 202 kPa on the ground
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Deep Ground Improvement by CMC and PVDNormalized plots
Min. elevation: -34.34 m
SOIL ANALYSIS FROM CPT
-34.4
-32.4
-30.4
-28.4
-26.4
-24.4
-22.4
-20.4
-18.4
-16.4
-14.4
-12.4
-10.4
-8.4
-6.4
-4.4
-2.4
-0.4
+1.6
+3.6
0 4 8 12
Ele
vati
on
(m
RL
)
Cone resistance qt (MPa)
-34.4
-32.4
-30.4
-28.4
-26.4
-24.4
-22.4
-20.4
-18.4
-16.4
-14.4
-12.4
-10.4
-8.4
-6.4
-4.4
-2.4
-0.4
+1.6
+3.6
0 2 4 6 8
Ele
vati
on
(m
RL
)
Friction ratio Rf (%)
GWT
-34.4
-32.4
-30.4
-28.4
-26.4
-24.4
-22.4
-20.4
-18.4
-16.4
-14.4
-12.4
-10.4
-8.4
-6.4
-4.4
-2.4
-0.4
+1.6
+3.6
-300 0 300 600 900 1200
Ele
vati
on
(m
RL
)
Pore pressures u0, u2 (kPa)
u0 u2
-34.4
-32.4
-30.4
-28.4
-26.4
-24.4
-22.4
-20.4
-18.4
-16.4
-14.4
-12.4
-10.4
-8.4
-6.4
-4.4
-2.4
-0.4
+1.6
+3.6
1 2 3 4
Ele
vati
on
(m
RL
)
SBTn index Ic
0 1 2 3 4 5 6 7 8 9+3.98
+1.98
-0.02
-2.02
-4.02
-6.02
-8.02
-10.02
-12.02
-14.02
-16.02
-18.02
-20.02
-22.02
-24.02
-26.02
-28.02
-30.02
-32.02
-34.02
Normalized Soil Behaviour Type SBTn
Ele
vati
on
(m
RL
)
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Deep Ground Improvement by CMC and PVD
Scope of work
• Landfill of 3m thick (113,000m2), distributed load 50 kPa
✓ Settlements (medium and long term)
➢ Prefabricated Vertical Drains and Preload
• Foundation of 11 tanks, diameter 43m, applying 202 kPa on the ground
✓ Total and differential settlements
✓ Bearing capacity
➢ Controlled Modulus Columns (CMC)
/ geotechnical challenges / ground improvement solution:
Design
02
www.menard.com.mx / www.menard-group.com(52) 55 5241 1108 / menard@menard.com.mx
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Deep Ground Improvement by CMC and PVD
Design basis:
- Controlled Modulus Columns (CMC)
- Diameter 400 mm
- Distance 2.0 to 2.5 m
- Depth from 35 to 38 m
- Prefabricated Vertical Drains (PVD)
- Prefabricated Material
- Distance about 2.0 m
- Depth from 33 to 35 m
Below the tanks
10 www.menard.com.mx / www.menard-group.com
Deep Ground Improvement by CMC and PVD
Design basis:
- Controlled Modulus Columns (CMC)
- Diameter 400 mm
- Distance 2.0 to 2.5 m
- Depth from 35 to 38 m
- Prefabricated Vertical Drains (PVD)
- Prefabricated Material
- Distance about 2.0 m
- Depth from 33 to 35 m
Below the tanks + preloaded areas
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Deep Ground Improvement by CMC and PVD
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Deep Ground Improvement by CMC and PVD
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Deep Ground Improvement by CMC and PVD
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Deep Ground Improvement by CMC and PVD
Determination of loading time Value Unit
Loading time t 4.00 month
undrained consolidation Uv 26.25 %
drained consolidation U 90.95 %
Soil parameters Value Unit
Vertical consolidation coefficient Cv 1.3E-07 m²/s
Radial consolidation coefficient Cr 3.9E-07 m²/s
Drained sides (1 ou 2) 2
Drained thickness h 10.00 m
Vertical Drains parameters Value Unit
Mesh L 2.0 m
Triangular (1,05); Squared (1,13) 1.13
Drains diameter d 0.05 m
Execution
03
www.menard.com.mx / www.menard-group.com(52) 55 5241 1108 / menard@menard.com.mx
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Deep Ground Improvement by CMC and PVD
CMC + PVD combined solution
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Deep Ground Improvement by CMC and PVD
Constructive details for
treatment below the ringwall
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Deep Ground Improvement by CMC and PVD
CMC equipments
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Deep Ground Improvement by CMC and PVD
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Deep Ground Improvement by CMC and PVD
PVD equipment
QA / QC
04
www.menard.com.mx / www.menard-group.com(52) 55 5241 1108 / menard@menard.com.mx
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Deep Ground Improvement by CMC and PVD
Real time monitoring system
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Deep Ground Improvement by CMC and PVD
➢ Hydraulic pressure
➢ Concrete pressure
➢ Pull-down
➢ Torque
➢ Penetration speed
➢ Extraction speed
➢ CMC’s profile
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Deep Ground Improvement by CMC and PVD
Load-bearing
control test
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Deep Ground Improvement by CMC and PVD
Load-bearing control test
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Deep Ground Improvement by CMC and PVD
Concrete slump
test
Compressive
strength tests
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Deep Ground Improvement by CMC and PVD
Piezometers
¡GRACIAS!
www.menard.com.mx / www.menard-group.com(52) 55 5241 1108 / menard@menard.com.mx