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TABLE 3: TYPICAL SOIL 8 ROCK PROPERTIES <br />•- <br />• <br />TABLE 1 - TYPICAL SOIL AHD ROCK PROPERTIES <br />Description Uni[ weight Fric[Ion Cohesion <br /> (Saturated/d <br />) <br /> ry angle <br />Type NateriaL Zb/fit IW/m7 dagrara Zb/ft2 kPa <br /> Loose sand uniform grain size ~ 118/90 19/14 28-j4• <br /> Dense sand, uniform grain sire 130/109 21/I] 32-40• <br /> v <br />e <br />Loose sand, raised grain size <br />124/99 <br />20/16 <br />34-40• <br /> m <br /> Dense sand, mined grain size 135/116 21/18 38-46• <br />~ ~ Gravel, uniform grain size 140/13D 22/20 34-31• <br />c <br />~ <br />v <br />Sand and gravel, mized grain size <br />120/110 <br />19/17 <br />48-45• <br />V <br />O Y <br /> ~ Basalt 140/110 22/17 40-50• <br /> r Chalk 80/62 1}/10 30-40* ~~ <br /> n. <br />4 <br />Granite <br />lzs/It0 <br />2x/17 <br />45-50' <br /> t° Limestone 12Q/too 19/16 35-40• <br /> 0 <br /> :: Sandstone 110/BO ]7/13 35-45• <br /> shale 125/loo 20/16 30-35• <br /> m <br /> So (t bentonite 80/30 13/6 )-13, 200-400 10-20 <br /> Very soft organic clay 90/40 14/6 12-16 200-600 10-30 <br /> Soft, slightly organic clay 100/60 115/IO 22-27 400-1000 20-50 <br /> ~, Soft glacial clay 110/76 11/12 27-32 600-1500 30-70 <br /> a <br />v <br />stiff glacial cl ar <br />130/105 <br />20/17 <br />10-32 <br />500-3000 <br />70-150 <br /> Glacial tilt, mined grain size 145/130 23/2D 32-35 000-5000 150-250 <br />i Hard igneous rocks - •• ' <br />72oootl- <br />35Dtltl- <br />~ granite, basalt, porphyry 16o to l90 25 to 30 35-45 1150000 55000 <br />0 <br /> Hetamo rphic rocks - ~ <br />160 to 180 <br />25 to 28 <br />70-40 400000- 20000- <br /> quartzite, 9ne iss, slate 800000 40000 <br /> x <br />Hard sedimentary rot ks - <br /> <br />150 co 180 <br /> <br />2; to 28 <br /> <br />75-45 <br />200000- <br />10000- <br /> 600000 30000 <br /> limestone, dolomite, sandstone <br /> so (t sedimentary rock - 110 to 150 17 to 27 25-35 20000 - 1000- <br /> sandstone. coal, chalk, shale 400000 20000 <br />-1 Higher friction angles In coheslonless materials occur at for confining or normal <br />stresses as discussed In Chapter 5- <br />++ For intact rock, [he w(t weight of the materlal•does not vary signlf (candy be[.een <br />saturated and dry states ri th the eaceptlon of materials such as porous sandstones. <br />• FROM ROCK SLOPE ENGINEERING, CHAPTER 2 "BASIC N.ECHANICS OF <br />SLOPE FAILURE" REVISED THIRD EDITION, PAGE 23. <br />Revised 3/82 3.5B-4 <br />.._ .. _. ..Rra -. ,.a-. <br />