|
TERM GRAIN SIZE EXAMPLES
<br /> k r, >Basketball CI► Boulders >12"
<br /> $ Cobbles 3-to12" Fist to basketball FIELD REFERENCE
<br /> Gravel-coarse 3/4'to3" Thumb to fist SOIL CLASSIFICATION
<br /> 1 Gravel-fine #4 to 314" Pea to thumb
<br /> i Sand-coarse #10 to#4(5 mm) Rock sat to peat MOISTURE CONTENT
<br /> Dry Dusty,dry to the touch
<br /> Sand medium #40 to#10(2 min) Sugar torock saR �Moist Da but no visible
<br /> Sand-fine #200 to#40(0.4 mm) Flour to sugar water near optimum
<br /> <#200 0.08 min Grains not visible Visible free water,
<br /> Fines ( ) Wet saturated,over optimum
<br /> RELATIVE DENSITY OF COARSE-GRAINED(COHESIONLESS)SOILS
<br /> (Cohesionless Silt,Sand,and Gravel)
<br /> N.SPT, RELATIVE
<br /> BLOWSIFT DENSITY FIELD TEST FOR RELATIVE DENSITY OF SAND
<br /> t 0 to 4 Very loose Easily penetrated with 1/2'reinforcing rod pushed by hand
<br /> 4 to 10 Loose Easily penetrated with 1/2"reinforcing rod pushed by hand
<br /> 10 to 30 Medium dense Penetrated one foot with 112"reinforcing rod driven with 5-Ib hammer
<br /> EXAMPLES 3010 50 Dense Penetrated one foot with 1/2'reinforcing rod driven with 54b hammer
<br /> Very dense,bghl brown,slightly silty, Over 50 Very dense Penetrated only a few inches with 112'reinf.rod driven with 54b hammer
<br /> sandy fine GRAVEL,trace of cobbles;
<br /> moist;scattered owls;(Weathered Tilq
<br /> y GP-GM. RELATIVE CONSISTENCY OF FINE-GRAINED(COHESIVE)SOILS
<br /> 5 Medium stiff,dark gray,silly CLAY,trace (Cohesive Silt,Clayey Silt,and Clay)
<br /> Q of fine sand;moist;laminated(<2mm) N.SPT. RELATIVE TORVANE,tsf POC.PEN.,lsf
<br /> ;0 with right gray silt,occasional BLOWS/FT CONSISTENCY SHEAR STR. UNCONF.STR. MANUAL PENETRATION TEST
<br /> o slickensides;(Glaciolacusbine)CL. <2 Very soft <0.13 <0.25 Easy several inches by fist
<br /> 1; Medium dense,dark brown,sandy SILT, 2 to 4 Soft 0.13 to 0.25 0.25 to 0-5 Easy several inches by thumb
<br /> z, trace of clay;wet;numerous organics and 4 to 8 Medium stiff 0.25 to 0.5 0.5 to 1 Moderate several inches by thumb =
<br /> strong organic odor;(Marsh Deposits)ML.
<br /> 8 to15 Stiff 0.5 to 1 1 to 2 Readily indented by tllurrhb _
<br /> c Loose and soft,mottled black and green, 15 to 30 Very stiff 1 to 2 2 to 4 Readily indented by thumbnail
<br /> silty SAND and clayey SILT;moist: Over 30 Hard >2 >4 Difficulty by thumbnail
<br /> hydrocarbon sheen and faint hydrocarbon =
<br /> 3 odor,(Fill)SM/ML 2 -
<br /> L —_
<br /> u STRUCTURE
<br /> TERM THICKNESS GROUP TYPICAL DESCRIPTION -
<br /> MAJOR DIVISIONS SYMBOL
<br /> EJ
<br /> "z Parting 0 to 1116" Well-Graded Gravels,Gravel-Sand Mixtures,
<br /> Seam 1/16 to 112" Clean Gravels GW Little or No Fines 4
<br /> Gravels (less than _
<br /> W Layer >1/2" (more than 50% 5%fines) GP Poody-Graded Gravels,Gravel-Sand Mixtures
<br /> Lamination <6 mm,<1/4" of coarse fraction
<br /> Pocket Irregular,<1 foot maim on Gravels with Fines GM Silty Gravels,Gravel-Sand-Silt Mixtures S =
<br /> u Varved Alternating seams or lam. Coarse-Grained No.4 sieve) (more than =
<br /> - Occasional <1 per foot SONS 12%fines) GC Clayey Gravels,Gravel-Sand-Clay Mixtures —
<br /> e Dian
<br /> Frequent >-1 per foot ( retained
<br /> al ed n WefiSraded Sands,Gravelly Sands, 6 -
<br /> Clean Sands SW Little or No Fines
<br /> DESCRIPTION CRITERIA,LIST THOMSS No.200 sieve) Sands less than =
<br /> c (50%or more of 5%fines Poorly-Graded Sands,Gravely Sands, 7 =
<br /> Stratfied Altemating layers ) SP =
<br /> Use Dual coarse fraction Little or No Fines
<br /> Interbedded Alternating layers>1/2" =
<br /> I passes the _
<br /> Laminated AIL layers<6 mm thick Symbols for No.4 sieve) Sands with Fines SM Silty Sands,Sand-Sift Mixtures s
<br /> Fractured Breaks easily along 5 to 12%Fines (more than =
<br /> % definite fractured planes (i.e.GP-GM)) 12%fines) Sc Clayey Sands,Sand-Clay Mixtures =
<br /> o Slickensided Polished,glossy,striated Inorganic Silts and Very Fine Sands,Rock Flour, g
<br /> fractured planes ML Silty or Clayey Fine Sands or Clayey Silts with =
<br /> 0 Slight Plasticity —_
<br /> 0 Blocky,Diced Easily breaks into small Sits and Clays Inorganic
<br /> v, angular lumps (liquid limit Inorganic Clays of Low to Medium Plasticity, 1�-
<br /> Lensed Small pockets of diff.soils less than 50) CL Gravelly Clays,Sandy Clays,Silt'Clays,
<br /> cHomogenous Same color and Lean Clays '
<br /> appearance throughout Fine-Grained _
<br /> y ppe W9 Sots Organic Silts and Organic Silty Gays of -
<br /> Sheared Disturbed texture,mix of Organic OL Low Plasticity
<br /> strengths (�%or more =
<br /> passes the 12=
<br /> z No.200 sieve] CH Inorganic Clays of Medium to High Plasticity, _
<br /> ORGANIC CONTENT Sandy Fat Gay,Gravely Fat Clay
<br /> ADJECTIVE PERCENT BY VOLUME Inorganic
<br /> Silts and Gays Inorganic Silts,Micaceous or Diatomaceous Fine [144'=_=_
<br /> }" Occasional 0 to 1 (liquid limit RAH Sands or Salty Soils,Elastic Sift Scattered 1 to 10 50 or more)
<br /> Numerous t0 to 30 Organic Gays of Medium to High Plasticity,Organic OHOrganic Sifts
<br /> Organic 3010 50,minor constituent
<br /> PEAT 50 to 100,MAJOR const Highly Organic Primarily organic matter,dark Peat,Humus,Swamp Soils with High Organic
<br /> E PT
<br /> Describe type and size of organic debris. Soils in color,and organic odor Content(See D 4427-92)
<br /> Inches
<br /> I�III�II I�III�I I�III�II I�III�I I'III�III�III�I III I�III�III�I I� III�III�IIIII IIIIII III�IIIII
<br />
|