Laserfiche WebLink
2.6 <br /> TABLE 1 - TYPICAL SOIL AND ROCK PROPERTIES <br /> Description Unit weight Friction Cohesion <br /> �jpe Material (Saturated/dry) angle 2 kPa <br /> Zb/ft kN/m3 degrees Zb/-`t <br /> Loose sand. uniform grain size 118/90 19/14 28-34" <br /> Dense sand, uniform grain site 130/109 21/17 32-40" <br /> oose sand, mixed grain size 124/99 20/16 34-40* <br /> [Dense sand, mixed grain size 135/116 21/18 38-46* <br /> n <br /> A N <br /> Gravel, uniform grain size 140/130 22/20 34-3P <br /> v Sand and gravel , mixed grain size 120/110 19/17 48-45" <br /> u <br /> o Basalt 140/110 22/17 40-50* <br /> c <br /> Chalk 80/62 13/10 30-40" <br /> Granite 125/110 20/17 45-50" <br /> Limestone 120/100 19/16 35-40* <br /> Sandstone 110/80 17/13 35-45* <br /> y <br /> m <br /> Shale 125/100 20/16 30-35" <br /> Soft bentonite 80/30 13/6 7-13 200-400 10-20 <br /> Very soft organic clay 90/40 14/6 12-16 200-600 10-30 <br /> Soft, slightly organic clay 100/60 16/10 22-27 400-1000 20-50 <br /> Soft glacial clay 110/76 17/12 27-32 600-1500 30-70 <br /> Stiff glacial clay 130/105 20/17 30-32 1500-3000 70-150 <br /> Glacial till, mixed grain size 145/130 23/20 32-35 3000-5000 150-25C <br /> N Hard igneous rocks - 160tto 190 25 to 30 35-45 720000- 35000- <br /> c granite, basalt, porphyry 1150000 55000 <br /> 0 <br /> Metamorphic rocks - 160 to 180 25 to 28 30-40 400000- 20000- <br /> quartrite, gneiss. slate 800000 40000 <br /> o Hard sedimentary rocks - 200000- 10000- <br /> limestone, dolomite, sandstone 150 to 180 23 to 28 35-45 600000 30000 <br /> Soft sedimentary rock - 20000 - 1000- <br /> 110 to 150 17 to 23 25 35 <br /> 400000 20000 <br /> sandstone, coal, chalk, shale <br /> * Higher friction angles in cohesionless materials occur at low confining or normal <br /> stresses as discussed in Chapter 5. <br /> *• For intact rock, the unit weight of the material does not vary significantly between <br /> saturated and dry states with the exception of materials such as porous sandstones. <br />