Unified training-part-b
-
Upload
zakee-kazmee -
Category
Documents
-
view
813 -
download
0
description
Transcript of Unified training-part-b
![Page 1: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/1.jpg)
Unified Soil Classification Unified Soil Classification System TrainingSystem Training
Part B - USCS using Laboratory DataPart B - USCS using Laboratory Data
![Page 2: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/2.jpg)
Comparison of Particle Size Comparison of Particle Size DefinitionsDefinitions USDA
cobblessandclay gravel
3”2 .05 mm # 4
silt
USCS
cobblessandfines gravel
.074 mm # 4 3”
# 200
![Page 3: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/3.jpg)
ASTM StandardsASTM Standards
Lab Data Classification is byLab Data Classification is by
ASTM D2487 ASTM D2487
Classification of Peat Samples, see Classification of Peat Samples, see
ASTM D 4427ASTM D 4427
Field Classification is by D2488Field Classification is by D2488
![Page 4: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/4.jpg)
Comparison of Particle Size Comparison of Particle Size DefinitionsDefinitions
![Page 5: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/5.jpg)
Activity 2Activity 2 - Particle Size Comparisons - Particle Size Comparisons
![Page 6: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/6.jpg)
USCS Flow Chart - Activity 3USCS Flow Chart - Activity 3
![Page 7: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/7.jpg)
Flow Chart OverviewFlow Chart Overview
Two Broad CategoriesTwo Broad Categories– Fine-Grained - 50% or more finer than the Fine-Grained - 50% or more finer than the
# 200 sieve# 200 sieve
– Coarse-Grained - Less than 50% finer than Coarse-Grained - Less than 50% finer than the # 200 sievethe # 200 sieve
![Page 8: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/8.jpg)
USCS OverviewUSCS Overview
F in e -G ra in ed
S o ils
5 0 % or M o rep a sse s the# 2 00 sie ve
C o a rse-G ra in ed
S o ils
L e ss tha n 5 0 %is f ine r th an
th e # 2 0 0 s ie ve
M e a su re %F in e r th an
# 20 0 S ie ve
![Page 9: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/9.jpg)
Flow Chart OverviewFlow Chart Overview
Fine-Grained SoilsFine-Grained Soils– Organic ( LL ratio < 0.75 )Organic ( LL ratio < 0.75 )
– Inorganic (no odor and LL ratio not < 0.75)Inorganic (no odor and LL ratio not < 0.75)
– Classify by LL, PIClassify by LL, PI
– Modifiers are H or L for LL value, C or M Modifiers are H or L for LL value, C or M for plasticity and O for organicfor plasticity and O for organic
![Page 10: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/10.jpg)
USCS OverviewUSCS Overview
O L
A ir-d ry LLis < 50
O H
A ir-D ry L Lis = o r > 50
O rg a n icS o ils
R a tio o f O ve n -d ryto A ir-d ryL L V a lu esis < 0 .75
C la ss ify b yP lo tt in g L L &
P I o n P la s tic ityC h a rt
In o rga n icS o ils
R a tio o f O ve n -d ryto A ir-d ryL L V a lu esis > 0 .75
D e te rm ineW h eth erO rg a n icO r n o t
![Page 11: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/11.jpg)
Activity 4 - Organic Soil Activity 4 - Organic Soil
Solve 4 samplesSolve 4 samples
![Page 12: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/12.jpg)
Abbreviations Fine-GrainedAbbreviations Fine-Grained
H - High LL ( H - High LL ( >> 50 ) 50 ) L - Low LL ( < 50 ) L - Low LL ( < 50 ) C - Plastic FinesC - Plastic Fines M - Nonplastic or slightly plastic M - Nonplastic or slightly plastic
finesfines O - OrganicO - Organic Pt - PeatPt - Peat
![Page 13: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/13.jpg)
Activity 5 - Plasticity ChartActivity 5 - Plasticity ChartUnified Soil Classification System Plasticity Chart
0
10
20
30
40
50
60
0 10 20 30 40 50 60 70 80 90 100
LIQUID LIMIT
PL
AS
TIC
ITY
IND
EX CH
CL
ML
MH
CL-ML
![Page 14: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/14.jpg)
Activity 5 - Plasticity Chart Activity 5 - Plasticity Chart
Solve 4 samplesSolve 4 samples
![Page 15: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/15.jpg)
Activity 7 - Classify Fine-Activity 7 - Classify Fine-Grained Samples Grained Samples
Assume 6 samples are Assume 6 samples are not not
organicorganic and classify by USCS and classify by USCS
![Page 16: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/16.jpg)
Flow Chart OverviewFlow Chart Overview
Coarse-Grained Soils - 3 GroupsCoarse-Grained Soils - 3 Groups
– Clean - Less than 5 % FinesClean - Less than 5 % Fines
– Dirty - More than 12 % FinesDirty - More than 12 % Fines
– Dual - From 5% to 12% Fines, Dual - From 5% to 12% Fines,
inclusiveinclusive
![Page 17: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/17.jpg)
Coarse-grained SoilsCoarse-grained Soils
C le anC o a rse-G ra in ed
L e ss tha n 5 %fin er th an
# 2 00 sie ve
D u a lC o a rse-G ra in ed
F ro m 5 % to 1 2 %(in c lu s ive )f in e r th an
# 2 00 sie ve
D irt yC o a rse-G ra in ed
M o re tha n 1 2 %fin er th an
# 2 00 sie ve
L e ss tha n 5 0 %is f ine r th an# 2 00 sie ve
![Page 18: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/18.jpg)
Abbreviations Sands and GravelsAbbreviations Sands and Gravels
G - GravelG - Gravel
S - SandS - Sand
P - Poorly GradedP - Poorly Graded
W - Well GradedW - Well Graded
![Page 19: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/19.jpg)
Sieve AnalysesSieve Analyses
% fines = % finer than # 200 sieve
% sand = % finer # 4 minus % finer # 200
% gravel = % finer 3”minus % finer # 4
![Page 20: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/20.jpg)
Percent Particle CategoriesPercent Particle Categories
To compute % Gravel subtract % finer To compute % Gravel subtract % finer
than # 4 from % finer than 3”than # 4 from % finer than 3”
To compute % Sand subtract % finer To compute % Sand subtract % finer
than # 200 from % finer than # 4than # 200 from % finer than # 4
Percent Fines is % finer than # 200Percent Fines is % finer than # 200
![Page 21: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/21.jpg)
Activity 8Activity 8
For 7 samples, fill out ActivityFor 7 samples, fill out Activity
![Page 22: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/22.jpg)
Additional DefinitionsAdditional Definitions
To Classify Clean Coarse-Grained Soils, To Classify Clean Coarse-Grained Soils,
you must first plot grain-size curve and you must first plot grain-size curve and
determine three parametersdetermine three parameters
DD1010, D, D3030, D, D6060
![Page 23: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/23.jpg)
Determining DDetermining D1010, D, D3030, and D, and D6060
D10, millimeters
10
% f
iner
D30, millimeters
30
D60, millimeters
60
![Page 24: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/24.jpg)
Computing CU and CCComputing CU and CC
10
60
D
DCU
6010
230
DD
DCC
Coefficient of Uniformity
Coefficient of Curvature
High Values Indicate Well-Graded Soil
Values Between 1-3 Indicate Well-Graded Soil
![Page 25: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/25.jpg)
Activity 9Activity 9
Plot Curve from Data, compute Plot Curve from Data, compute
CU ValueCU Value
![Page 26: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/26.jpg)
Activity 10Activity 10
Plot Curve from Data, compute Plot Curve from Data, compute
CC ValueCC Value
![Page 27: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/27.jpg)
CCharacterizing Clean haracterizing Clean Sands and GravelsSands and Gravels
Particle SizeParticle Size
% F
iner
% F
iner Well gradedWell graded
Clean Well Graded Sands and Gravels have Clean Well Graded Sands and Gravels have less than 5 % fines and a wide range of less than 5 % fines and a wide range of particle sizes that are equally distributedparticle sizes that are equally distributed
![Page 28: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/28.jpg)
Poorly GradedPoorly Graded Sands and GravelsSands and Gravels
Poorly gradedPoorly graded
% F
iner
% F
iner
Particle SizeParticle Size
Either Mostly One-Size Particle
Gap gradedGap graded
Particle SizeParticle Size
% F
iner
% F
iner
Or Gap-
Graded
![Page 29: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/29.jpg)
Clean, Well/Poorly Graded Clean, Well/Poorly Graded DefinitionsDefinitions
SandsSands– less than 5 % less than 5 %
finesfines
– CU > 6CU > 6
– CC = 1-3CC = 1-3
GravelsGravels– less than 5 % less than 5 %
fines fines
– CU > 4CU > 4
– CC = 1-3CC = 1-3
![Page 30: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/30.jpg)
Activity 11 - ProblemsActivity 11 - Problems
1. Verify % Fines - Coarse-Grained/Clean1. Verify % Fines - Coarse-Grained/Clean
2. Compute % Gravel and % Sand2. Compute % Gravel and % Sand
3. Note which predominates3. Note which predominates
4. Using provided CU and CC, Determine 4. Using provided CU and CC, Determine whether poorly or well gradedwhether poorly or well graded
5. Determine Correct USCS classification5. Determine Correct USCS classification
![Page 31: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/31.jpg)
Activity 12Activity 12
Review Example SoilReview Example Soil
![Page 32: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/32.jpg)
Activity 13Activity 13
Use Flow Chart, Classify SoilUse Flow Chart, Classify Soil
![Page 33: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/33.jpg)
Activity 14 Summary of Classifications of Activity 14 Summary of Classifications of Coarse-Grained SoilsCoarse-Grained Soils
Clean Sands and Gravels (< 5% fines)Clean Sands and Gravels (< 5% fines)– Clean Poorly Graded Gravels GPClean Poorly Graded Gravels GP
– Clean Well Graded Gravels GWClean Well Graded Gravels GW
– Clean Poorly Graded Sands SPClean Poorly Graded Sands SP
– Clean Well Graded Sands SWClean Well Graded Sands SW
![Page 34: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/34.jpg)
Dirty Coarse-Grained SoilsDirty Coarse-Grained Soils
If a sample has less than 50 % FinesIf a sample has less than 50 % Fines
And it has more than 12 % Fines, it is a And it has more than 12 % Fines, it is a
Dirty Coarse-Grained SoilDirty Coarse-Grained Soil
To Classify, follow the flow chart and To Classify, follow the flow chart and
the following stepsthe following steps
![Page 35: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/35.jpg)
Dirty Coarse-Grained SoilDirty Coarse-Grained Soil
Determine whether there is a greater % Determine whether there is a greater %
of Sand or Gravelof Sand or Gravel– % G = % finer 3” minus # 4% G = % finer 3” minus # 4
– % S = % finer # 4 minus # 200% S = % finer # 4 minus # 200
Determine where minus # 40 fines plot Determine where minus # 40 fines plot
on plasticity charton plasticity chart
![Page 36: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/36.jpg)
Dirty Sands and GravelsDirty Sands and Gravels
SC - Fines Plot Above A-LineSC - Fines Plot Above A-Line SM - Fines Plot Below A-LineSM - Fines Plot Below A-Line SC-SM - Fines Plot in Hatched ZoneSC-SM - Fines Plot in Hatched Zone
GC - Fines Plot Above A-LineGC - Fines Plot Above A-Line GM - Fines Plot Below A-LineGM - Fines Plot Below A-Line GC-GM - Fines Plot in Hatched ZoneGC-GM - Fines Plot in Hatched Zone
Sands
Gravels
![Page 37: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/37.jpg)
Activity 16 - ProblemsActivity 16 - Problems
![Page 38: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/38.jpg)
Activity 17 - Example of Activity 17 - Example of Classifying Dual-Classification Classifying Dual-Classification Coarse-Grained SoilCoarse-Grained Soil
![Page 39: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/39.jpg)
Activity 18 - ProblemActivity 18 - Problem
![Page 40: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/40.jpg)
Activity 20 - Review QuestionsActivity 20 - Review Questions
![Page 41: Unified training-part-b](https://reader034.fdocuments.in/reader034/viewer/2022042713/5496e950b479596a588b460b/html5/thumbnails/41.jpg)
Activity 21 - Comprehensive Activity 21 - Comprehensive ProblemsProblems