Geotechnical Field @1geotechnic_soft.ppt

slope stability

1. Telegram:
@geotechnic_soft
کینکتئوژ ی یارحص یاه تست یامنهار

2. •Soil Sampling (Soil Profile)
–Hand Auger, Split-Spoon Sampling, Ground Water Level
•Laboratory Tests (Soil Type Determination)
–Grain Size Distribution, In-Situ water content
•In-situ Soil Density
–Sand Cone (Direct)
–Water Balloon (Direct)
–Nuclear Densometer (Indirect)
•Strength Relationships
–Standard Penetration, Vane Shear, Nilcon Vane (Indirect
methods)
•Plate Load Test
–Bearing Capacity (Direct method)
GeotechnicalInvestigations

3. Soil Sampling
Soil Identification and Classification
Augering Bore Holes for Soil Sampling

4. Bore hole
Start
Soil line at a
1 to 1 scale
showing soil
profile with
depth
Different soil
types
Soil line is
placed 2 m
from bore
hole
Hand Auger Soil Profile with Depth
Soil Sampling
Soil Identification and Classification

5. Auger to a
measured depth
Carefully remove
soil from auger
Lay soil on ground
(1:1 Scale)
Soil Sampling
Soil Identification and Classification

6. •Laboratory Tests (Soil Type Determination)
–Soil samples are to be taken for the following tests
•Sand cone & water balloon tests (each depth)
•Hand auger
•Standard Penetration Test (SPT)
–Determine the in-situ water content of each sample
–Oven dry the remaining samples
–Perform a grain size analysis for each sample
•Nameand classifyeach sample using the Unified Soil
Classification System(USCS)
Laboratory Test
Soil Identification and Classification

7. SandCone Test
Field Density
Sand Cone Equipment Field Application

8. Calibrating Sand Cone Equipment
SandCone Test
Field Density

9. Calibrating Sand Cone Equipment
SandCone Test
Field Density

10. Calibrating Sand Cone Equipment
SandCone Test
Field Density

11. CalibratingSand Cone Equipment
SandCone Test
Field Density

12. Water BalloonTest
Field Density
Water Balloon Equipment Field Application

13. CalibratingWater Balloon Equipment
Water BalloonTest
Field Density

14. Setup for Density Tests
Digging Test Pit
Ensuring Bottom is Level
Leveling Soil Surface

15. Digging Test Hole
Sand Cone Test in
Progress
Reading Water Level
Performing Density Tests

16. Standard Penetration (SPT)
Penetration Number, N: Used in the estimation of f’
and Design of Foundations (CVG 3106)
Soil Sample Recovered
within SPT Sampler
SPT Sampler Schematic
Assembled SPT Sampler

17. Our SPT Testing Apparatus
Standard Penetration (SPT)
Penetration Number, N: Used in the estimation of f’
and Design of Foundations

18. Truck Mounted SPT Apparatus.
“One Man Crew”
Augering Bore Hole
Standard Penetration (SPT)
Penetration Number, N: Used in the estimation of f’
and Design of Foundations

19. Raising 70 lb Weight
(Conventionally 140 lb
Weight is Used)
Proper Technique of Releasing the
Weight to Reduce Pulley Friction
Standard Penetration (SPT)
Penetration Number, N: Used in the estimation of f’
and Design of Foundations

20. Field Bore Hole Log
Standard
Penetration
Test (SPT)
Penetration Number,
N
Used in the estimation
of f’ and Design of
Foundations

21. Std. Penetration Number (N) with Depth

22. Vane Shear Test
In-situ shear strength of soft clays
Field Vane Showing Failure Surface

23. Inserting Field Vane to Desired Depth
Vane Shear Test
In-situ shear strength of soft clays

24. Sometimes the soil has a high shear strength
Vane Shear Test
In-situ shear strength of soft clays

25. Bore Hole
Spring
Balance
Vane
Drill Rod
15 cm
Proper Method to Apply Torque
to Field Vane
Field Vane Schematic
Vane Shear Test
In-situ shear strength of soft clays

26. Nilcon Vane Schematic Nilcon Vane Recorder
Nilcon Vane Test
In-situ shear strength of soft clays

27. Installing Anchors Installing Anchor Extensions
Nilcon Vane Test
In-situ shear strength of soft clays

28. Assembled Nilcon
Vane
Rods pass
through the
recorder and ...
Into bore
hole …
Nilcon Vane Test
In-situ shear strength of soft clays

29. Shearing the SoilLowering Field Vane into Soil
Nilcon Vane Test
In-situ shear strength of soft clays

30. Plate Load Test
In-situ Bearing Capacity
Plate Load Test Schematic

31. Plate Load Anchor Anchor Schematic
Plate Load Test
In-situ Bearing Capacity

32. Placing Anchors Torque
Wrench
Placing Anchors Torque
Wrench and Moment Arm
Extensions
Plate Load Test
In-situ Bearing Capacity

33. Placing Anchors
Ensuring Anchors are Level and Properly Orientated
Plate Load Test
In-situ Bearing Capacity

34. Digging Plate Load Test Pit
Plate Load Test
In-situ Bearing Capacity

35. Plate Stack at Beginning
of Test
Plate Stack at Failure.
Failure Depth = 25 mm
Plate Load Test
In-situ Bearing Capacity

36. Graph of Time vs. Settlement.
3 kg/cm
2
Load Increment
2
Graph of Applied Load vs.
Total Settlement
Plate Load Test
In-situ Bearing Capacity

37. Plate Load Test Using Dead Load
Plate Load Test
In-situ Bearing Capacity

38. Bearing Capacity Failure Envelop
Plate Load Test Schematic Foundation Failure
Plate Load Test
In-situ Bearing Capacity

39. Group List
Groups
A B C D E F G
Alkhatib Charette Ferreira Lacasse Luk Mustaard Toure
AucklandCharleboisFrancoeurLatimerMacDonald Nault
Wilke-
Alemany
Burtt Dowie Guignion Lehoux Michaluk Rowat Wood
Caron Duthie Hay Lesage Morcos Tahelali Yu
Cheung Deku BelleteteFerrari Lane Lauzon Andoseh
RegimbaldOstrowskiTchernychovTudor Bahia Bruneau Chan

40. Project List
Testing Schedule
TimeABCDEFG
7.30-8.00 Site Instructions, Tools Setup, Preparation
8.00-10.00SPTSPTSPT SW SW HA HA
10.00-12.00FV FV FV HA HA SW SW
12.00-1.00 Lunch
1.00-3.00SW SW HA SPT SPT SPT SPT
3.00-5.00HA HA SW FV FV FV FV
SW -Sand Cone / Water Balloon
SPT-Standard Penetration Test
FV -Field Vane Shear
HA-Hand Auger / Split Spoon Soil Sampling

41. Geo-Field School Report
•Treat The Report as if you are writing a Technical
Report as a Consulting Engineer on The Carp
Airport
–Typed, double spaced, bounded with a cover page
•Include name and student number of each member and
indicate the contribution of each student towards the report
•Laboratory Tests of Soil Samples
–Determine the in-situ water content of each sample
–Oven dry the remaining samples
–Perform a grain size analysis for each sample
•Nameand classifyeach sample using the Unified Soil
Classification System

42. Geo-Field School Report
•Sand Cone and Water Balloon
–Name and classify the soil at each depth
–Determine the soil’s in-situ density for each depth and for
each test
–Compare the soil densities for each depth and give reasons
for any differences
–Compare the soil densities determined by each method and
give reasons for any differences
•Standard Penetration Test
–Name and classify the soil at each depth from the samples
collected
–Determine the field standard penetration number profile with
depth
–Calculate the corrected standard penetration number

43. Geo-Field School Report
•Hand Auger
–Name and classify the soil at each depth
–If possible, determine the depth of the
Ground Water Table (GWT)
•Field Vane
–Determine the soil’s peak and remolded
shear strength Values using both Two
Gauges Method and Torque Wrench
–Compare Peak and Remolded Shear
Strength of the two methods

44. Any Questions