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TABLE 3.5-10 TYPICAL SOIL 8t ROCK PROPERTIES <br />• <br />• <br />TA BCE I - TYPICAL SOIL AHD ROCK PROPERTIES <br />Description Uni[ weight <br />(S <br />) Friction Cohesion <br /> aturate d/dry angle <br />Type Ha ter„Q1 Zb/ftI kN/m3 degrees Zb/jt~ W'a <br /> loose sand uni(o rm grain size 118/90 19/14 28-34• <br /> Dense sand, uniform grain size 130/109 21/17 32-40• <br /> '4 <br />p <br />Loose sand, mixed qra in size <br />124/99 <br />20/16 <br />34 -40~ <br /> h <br /> Dense sand, mixed grain size 13$/116 21/18 38 -46s <br />-° > Gravel, uniform grain size 140/130 22/20 34-37• <br />c <br />~ <br />U <br />Sand and gravel, mined grain size <br />120/110 <br />19/1] <br />48-45' <br />u <br />O Y <br />o <br />Basalt <br />140/110 <br />22/17 <br />40-50' <br /> r Cna lk 80/62 }3/10 30-40= <br /> d <br />o <br />Granite <br />125/110 <br />20/17 <br />45-90• <br /> r- <br />`° <br />limestone <br />124/100 <br />19/16 <br />35-40= <br /> v <br /> .°2 sandstone 110/80 17/13 35-45° <br /> m <br />.3 <br />shale <br />125/100 <br />20/16 <br />30-35° <br /> m <br /> soft ben[onite 80/30 13/6 7-13 200-400 10-10 <br /> Very soft organic clay 90/40 14/6 12-16 200-600 10-30 <br /> Soft, slightly organic clay 100/60 16/10 22-27 400-1000 20-50 <br /> ~, Soft glacial clay 110/16 17/12 27-32 600-1500 30-70 <br /> a <br />v <br />S[if( glacial clay <br />130/105 <br />20/17 <br />30-32 <br />500-3000 <br />70-150 <br /> Glacial till, mixed grain size 145/130 23/20 31-35 000-5000 150-250 <br />i Hard igneous rocks - ~* <br />160 to 190 <br />z5 to 30 <br />35-45 <br />720000- <br />35DOD- <br />u granite, basalt, porphyry 1150000 55000 <br />0 <br /> Metamorphic rocks - <br />160 to t80 <br />25 to 28 <br />30-40 400000- 20000- <br /> 800000 40000 <br /> quartzite, gneiss, state <br /> Y <br />o <br />Hard sedimentary rocks - <br /> <br />150 [0 180 <br /> <br />23 to 28 <br /> <br />3$-45 <br />200000- <br />f0000- <br /> 2 600000 30000 <br /> limestone, dolomite, sandstone <br /> Soft sedimentary rock - ~ 110 to 150 17 to 23 25-35 20000 - I000- <br /> sands[one, coal, chalk, shale 400000 20000 <br />Higher friction angles in coheslonles5 materials occur at low confining or normal <br />stresses as discussed in Cha D[er S. - <br />~• For IntacC rock, the unit weight of the material does no[ vary significantly between <br />• saturated and dry states with the cxte ption of materials such as porous sandstones. <br />FROtJ ROCK SLOPE ENGINEERING, CHAPTER TV1'O: "BASIC MECHANICS OF FAILURE," <br />REVISED THIRD EDITION, PAGE 23 <br />3.5-14 <br />