ARCHIVED REPORTS_1981 - Laserfiche WebLink

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TABLE . UNIFIED SOIL CLASSIFICATION SYSTEM AND CHARACTERISTICS PERTINENT TO SANITARY LANDFILLS *Values are for guidance only; design should be based IThe equipment listed will usually produce the desired iCompacted soil at optimum moisture content for on test results. densities after a reasonable number of passes when Standard AASHO (Standard Proctor) conpactive moisture conditions and thickness of Litt are properly elloft. controlled. S Y M B O L Potential Drainaget Permeabi I i ty Permeability Std AASIIO Max Requirements for Major Divisions N A M E Frost Characteristics* Value for Embankments Compaction Characteristics Unit Ory Weight Seepage Control Letter Hatching Color Action per sec Ib per cu ftp C Weil -graded gravels or gravel -sand None 10 very Excellent Very stable. pervious shells 1 k > 10 Good, tractor, rubber -tired 125-135 Positive cutoff GW •.0. c mixtures, little or no fines Slight of dikes and dams steel -wheeled roller GP ,I.•' Poorly graded gravels or gravel -sand None 10 very Excellent Reasonably stable, pervious k> Good, -tractor, rubber -tired IIS -125 Positive cutoff GRAVEL '. mixtures, little or no fines slight shells of dikes and dams 10_2 steel -wheeled roller AND GRAVELLY Fair to Reasonably stable• not part - SOILS a Silty gravels. gravel -sand -Silt Slight 10 poor icularly suited to shells, k = 10_6 Good, withclosecontrol GH j mixtures meAlllp Poor to but may be for imperv- to 10 120 -135 Toe trench t0 none used roller � practically ious cont or blankets m impervious Clayey gravels, gravel -sand -clay Slight to Poor to Fairly stable, may be used for k = 10-6 Fair, rubber -tired, sheepsfoot 115-130 None GC mixtures medlUm practically impervious core to 10"8 roller COARSE- impervious GRAINED SOILS 0 po 00011 Well -graded railed sands or gravelly sands None 10 very Excellent Very stable, prtrvi ars sections k > 10" 3 Good, tractor 110-130 Upstream blanket and SW o 0 0 little or no Pinos Slight slope Drolcction required toe drainage or wells ®ae Poorly graded sands or gravelly None t0 very Reasonably stable. may be used k> Upstream blanket and SAND SP 00 sands, little or no fines Sllghl Excellent in dike section with flat slopes 10-3 Good, tractor 100-120 toe drainage or wells AND SANDY SOILS Fair to Fairly stable, not par4 ic- 3 SN ; Silly sands, sand -silt mixtures Slight to D oor ularly suile.d to sholis.but k = 10 6 Good, with close control. I10-125 Upstream blanket and big Poor to may be used for impervious to 10- rubber—tired, sheepsfoot toe drainage or wells practically cores or dikes roller impervious > Clayey sands, sand -clay mixtures Slight l0 Poor to acticaliy Fairly stable, use for imperv- ious torn for flood control _ k = 10 8 Fair, sheepsfoot roller, 105-125 None sc high pr to 10 rubber -tired impervious structures Inorganic sit is and very fine sands rock o llrhilh Fair to Poor stability,may be used 3 kto Good to poor, Clos e control HL flour, si l ty or clayey fine sands or for embankmens with proper IO -6 essential, rubber -tired 95-120 Toe trench to none SILTS clayey silts with slight plasticity very Y g Door control roller, sheepsfoot roller AND ac Inorganic clays of low to medium Medium l0 Pr aclically Slabtr, impervious toms k 10 6 Fair to good, sheepsfoot CLAYS "' LL IS CL K. "' plasticit ravel) clays sand y' gravelly y y high impervious and blankets to 10-8 roller, rubber -tired 95-120 Mone LESS THAN 50 clays, silty ciays,lean clays til Organic silts and organic silt- Medium to Poor Not suitable for embankments k - o -' Fair to poor, sheepsfoot 80-100 None Fill(- OL til Clays of low plasticity high to 10"6 roller GRA SOILS Inorganic silts, micaceous or Medium ID Fair to Poor stability, core of hyd- k = 10 -q Poor to very poor, sheepsfoot 70.95 None HH If diatomaceous fine sandy or silty very high poor raulic dam. not desirable to 10-6 roller SILTS soils, elastic silts in roiled fill tonstrut tion AND wr CLAYS Inorganic clays of high last- 9 Y 9 P Practical) Y Fair stability with flat slopes. -6 Fair to poor, sheepsfoot LL IS CN icily• fat clays Medium impervious tike cores, blankets and k s 10 8 roller 75-105 None GREATER m dike sections to 10- THAN 50 Organic clays of medium to Medium Practically Not suitable for embankments k s Ip -6 Poor to very poor, sheepsfoot 65-100 None ON ♦� high plasticity, org anic silts impervious to 10" 8 roller HIGHLY ORGAN tc sous Pt Orange Peat and other highly organic soils NOT RECOMMENDED FOR SANITARY LANDFILL CONSTRUCTION *Values are for guidance only; design should be based IThe equipment listed will usually produce the desired iCompacted soil at optimum moisture content for on test results. densities after a reasonable number of passes when Standard AASHO (Standard Proctor) conpactive moisture conditions and thickness of Litt are properly elloft. controlled.