marine geotechnical services - marinerenewables.ca · • consulting firm providing specialist...
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BGC Engineering Inc.
• Consulting firm providing specialist services in applied
earth sciences.
• Particular focus on the impacts of geology on engineered
structures.
• Our team of professional engineers, geoscientists, and
support staff provide a full range of geotechnical,
hydrological, hydrogeological and construction review
services.
• BGC provides technical expertise in Marine Geotechnical
Engineering for Pipeline, Marine Infrastructure, and
Energy Sectors.
Marine Geotechnical Services
• Owner’s Engineer
RFP development and review
Quality Assurance
Technical Review
• Prime Contractor
Site Investigation
Advanced Laboratory Testing
Geotechnical Interpretation
Engineering Analyses
Geohazard Assessment
Foundation Design
Example - Site Investigation Program
• 900 km Pipeline Project in BC
• 125 km of which traverses marine environment
• Drilled in water depths of up to 80 m, steep seabed
slopes, tidal environment
Varied Subsurface Stratigraphy
Borehole drilling
included:
• Sampling in
coarse, granular
material
• Soft sediment
sampling and
testing
• Bedrock Coring
… Multiple techniques were
used on a single project based
on geology, metocean
conditions and project needs
Options for Intrusive Marine Investigation
• Floating Barge (spud/anchor)
• Jack-up Platform
• Drill Ship
• Remotely Operated Drill
Laboratory Testing and Interpretation
• Automated Triaxial system
• Cyclic Dynamic DSS
• Automated Oedometers
Laboratory Testing and Interpretation
• Specialized equipment for soft marine sediments
• Testing of instrumented rock core for strength and
stiffness
Geotechnical Interpretation, Analyses
and Design
• Interpretation of engineering
parameters
• Geohazard Assessment
• Foundation Design
Undrained Shear Strength (su) kPa
0 20 40 60 80 100 120 140 160 180 200
Depth
belo
w m
udlin
e (
m)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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20
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35
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40
UU
Sv (lab)
CKoU
CPT-BGC14-NASS-12 (Nkt=15)
CPT-BGC14-NASS-11 (Nkt=15)
Sv (f ield)
su/p
o'=0.22
idealized su prof ile
Effective Stress s ' (kPa)
0 50 100 150 200 250 300 350 400 450
Sh
ea
r S
tre
ss
t (
kP
a)
0
50
100
150
200
250
300
At peak strength
At critical state
f ' CRIT= 36.5
o
y= 6
.5o
Bay of Fundy Wharf Improvements
• Lord’s Cove, Charlotte County, NB
• Dipper Harbour, Charlotte County, NB
• Capital Dredging of Cortenay Bay and
Main Channel, Saint John NB.
• Lower Wedgeport, NS
• Clark’s Harbour, NS
Geotechnical Investigations for Wharves, Breakwaters
and Dredging: