Geotechnical Examples
Geotechnical Examples
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
0
0
1000
1000
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0
1000
1000
1
11
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
BH-SD-01 Sonic Drilling Investigation
1
543820.5
4819425.7
543820.5
4819425.7
328.4
60
0
25
0
8262026170401
1
1
0
0
0
0
0
46260
46261
Cambridge, Ontario
Completed
46260
Sonic Drilling Services Ltd.
0
46261
0
0
6
Track-mounted rotosonic drilling with continuous core barrel
0
Continuous sonic core
5
5
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
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0
0
0
0
0
0
0
0
100
0
0
0
0
0
0
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0
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0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
1
0
2
{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}\f0\fs18 SAND AND GRAVEL FILL; compact, brown, moist, trace asphalt fragments.}
SAND AND GRAVEL FILL;
compact, brown, moist, trace
asphalt fragments.
Sand and gravel fill
Brown
None
Compact
3
2
0
0
1
0
5
USCS
0
0
1
1
0
16774360
0
16777215
6
1
0
90
50
0
0
1
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
2
2
12
{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}\f0\fs18 SILTY SAND; loose to compact, brown, moist, trace gravel.}
SILTY SAND; loose to compact,
brown, moist, trace gravel.
Silty sand
Brown
None
Loose to compact
3
2
0
0
1
0
6
USCS
0
0
1
1
0
16777177
0
16777215
6
1
0
90
50
0
0
1
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
3
12
25
{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}\f0\fs18 SILTY CLAY; soft to firm, grey, wet, medium plasticity, occasional silt seams.}
SILTY CLAY; soft to firm, grey,
wet, medium plasticity,
occasional silt seams.
Silty clay
Grey
None
Soft to firm
3
2
0
0
1
0
9
USCS
0
0
1
1
0
15132390
0
16777215
6
1
0
90
50
0
0
1
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
4
25
40
{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}\f0\fs18 SAND AND GRAVEL; compact to dense, grey-brown, wet, occasional cobbles.}
SAND AND GRAVEL; compact
to dense, grey-brown, wet,
occasional cobbles.
Sand and gravel
Grey-brown
None
Compact to dense
3
2
0
0
1
0
5
USCS
0
0
1
1
0
16774360
0
16777215
6
1
0
90
50
0
0
1
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
5
40
52
{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}\f0\fs18 SANDY SILT TILL; dense to very dense, grey, moist, gravel and cobbles.}
SANDY SILT TILL; dense to very
dense, grey, moist, gravel and
cobbles.
Sandy silt till
Grey
None
Dense to very dense
3
2
0
0
1
0
11
USCS
0
0
1
1
0
15790320
0
16777215
6
1
0
90
50
0
0
1
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
6
52
60
{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}\f0\fs18 WEATHERED SHALE; very weak to weak, grey, closely fractured becoming more competent with depth.}
WEATHERED SHALE; very
weak to weak, grey, closely
fractured becoming more
competent with depth.
Weathered shale
Grey
None
Very weak to weak
3
2
0
0
1
0
17
USCS
0
0
1
1
0
13421772
0
16777215
6
1
0
90
50
0
0
1
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
1811450
1813450
722650
724650
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
260
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
1
2.5
R-01: 4 min/ft; smooth advance
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
2
7.5
R-02: 5 min/ft; minor casing vibration
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
3
12.5
R-03: 7 min/ft; cohesive core swelling
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
4
17.5
R-04: 8 min/ft; wet core
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
5
22.5
R-05: 7 min/ft; soft clay and silt seams
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
6
27.5
R-06: 6 min/ft; water return established
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
7
32.5
R-07: 8 min/ft; gravel and cobbles
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
8
37.5
R-08: 7 min/ft; moderate vibration
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
9
42.5
R-09: 10 min/ft; dense till
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
10
47.5
R-10: 12 min/ft; frequent cobbles
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
11
52.5
R-11: carbide bit installed
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
12
57.5
R-12: 11 min/ft; fractured shale
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
1
18.5
Groundwater encountered during drilling.
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
2
24
Core extrusion slowed by swelling silty clay.
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
3
33
Cobbles caused temporary core blockage.
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
4
42
Casing advanced to 42 ft to maintain borehole stability.
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
5
52
Tooling changed to carbide bit at weathered shale contact.
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Remarks
6
60
Target depth reached; borehole pressure-grouted on completion.
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
1
0
SC-01
SONIC
0
92
0
0
5
23
0
1
0
0
16777215
0
SP-SM
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
2
5
SC-02
SONIC
0
94
0
0
5
23
0
1
0
0
16777215
0
SM
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
3
10
SC-03
SONIC
0
90
0
0
5
23
0
1
0
0
16777215
0
SM
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
4
15
SC-04
SONIC
0
78
0
0
5
23
0
1
0
0
16777215
0
CL
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
5
20
SC-05
SONIC
0
72
0
0
5
23
0
1
0
0
16777215
0
CL
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
6
25
SC-06
SONIC
0
84
0
0
5
23
0
1
0
0
16777215
0
GW-GM
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
7
30
SC-07
SONIC
0
88
0
0
5
23
0
1
0
0
16777215
0
GW-GM
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
8
35
SC-08
SONIC
0
91
0
0
5
23
0
1
0
0
16777215
0
SW-GM
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
9
40
SC-09
SONIC
0
86
0
0
5
23
0
1
0
0
16777215
0
ML
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
10
45
SC-10
SONIC
0
82
0
0
5
23
0
1
0
0
16777215
0
ML
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
11
50
SC-11
SONIC
0
76
0
0
5
23
0
1
0
0
16777215
0
SHALE
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
12
55
SC-12
SONIC
0
88
0
0
5
23
0
1
0
0
16777215
0
SHALE
0
0
None
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
1
LOG OF SONIC BORING:
BH-SD-01 Sonic Drilling Investigation
3
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
2
PROJECT:
Geotechnical Examples
5
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
3
PROJECT NO.:
Geotechnical Examples
6
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
4
DATE STARTED:
08/26/2026
14
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
5
GROUND ELEVATION:
328.4 ft
11
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
6
LOCATION:
Cambridge, Ontario
12
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
7
CLIENT:
Regional Infrastructure Authority
22
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
8
DRILLING CONTRACTOR:
Sonic Drilling Services Ltd.
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0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
9
SONIC RIG / METHOD:
Track-mounted rotosonic; continuous core
20
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
10
GROUNDWATER:
18.5 ft during drilling; 16.8 ft next morning
0
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
11
LOGGED BY:
M. Geotechnical Engineer
0
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
12
DATE COMPLETED:
08/27/2026
0
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
13
BOREHOLE DIAMETER:
6 in
0
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
14
CASING / CORE BARREL:
8 in casing; 6 in, 5 in and 4 in core barrels
0
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
15
TERMINATION DEPTH / REASON:
60.0 ft; target depth reached in competent shale
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0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
16
NOTES:
Continuous cores logged in 5 ft runs; borehole pressure-grouted on completion
0
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
1
FILL
0
2
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
2
SM
2
12
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
3
CL
12
25
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
4
GW-GM
25
40
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
5
ML
40
52
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
6
SHALE
52
60
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
1
R-01
0
5
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
2
R-02
5
10
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
3
R-03
10
15
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
4
R-04
15
20
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
5
R-05
20
25
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
6
R-06
25
30
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
7
R-07
30
35
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
8
R-08
35
40
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
9
R-09
40
45
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
10
R-10
45
50
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
11
R-11
50
55
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
12
R-12
55
60
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Method and Tooling
Drilling Method and Tooling
1
6 in core barrel; 8 in override casing
0
10
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Method and Tooling
Drilling Method and Tooling
2
5 in core barrel; casing advanced to 25 ft
10
30
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Method and Tooling
Drilling Method and Tooling
3
4 in core barrel; casing advanced to 42 ft
30
52
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Method and Tooling
Drilling Method and Tooling
4
4 in core barrel with carbide bit
52
60
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
Drilling Data
1
Smooth advance; 3-5 min/ft; low vibration
0
12
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
Drilling Data
2
Slow advance in cohesive soil; core swelling noted
12
25
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
Drilling Data
3
Moderate vibration; water return; cobbles locally
25
40
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
Drilling Data
4
High vibration and slower advance in dense till
40
52
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
Drilling Data
5
Carbide bit; firm advance; fractured shale core
52
60
0
1
0
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
USCS Classification
USCS Classification
155
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Sonic Run
Sonic Run
27
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Method and Tooling
Drilling Method and Tooling
27
Geotechnical Examples:H-SD-01 Sonic Drilling Investigation
Drilling Data
Drilling Data
260