Report - PEER - University of California, Berkeley
Report - PEER - University of California, Berkeley
Report - PEER - University of California, Berkeley
- No tags were found...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Table 1. Geotechnical Site Categories.SiteABCDEFCategoriesHard RockRockWeathered/S<strong>of</strong>t Rock or Shallow Stiff SoilDeep Stiff SoilS<strong>of</strong>t ClaySpecial, e.g., Liquefiable SandSite Description SiteCommentsPeriodA Hard Rock ≤ 0.1 s Hard, strong, intact rock; V s ≥ 5000 fpsB Rock ≤ 0.2 s Most "unweathered" <strong>California</strong> rock cases;V s ≥ 2500 fps or < 20 ft. <strong>of</strong> soil.C-1 Weathered/S<strong>of</strong>t Rock ≤ 0.4 s V s ≈ 1200 fps increasing to > 2000 fps,weathered zone > 20 ft. and < 100 ft.-2 Shallow Stiff Soil ≤ 0.5 s Soil depth > 20 ft. and < 100 ft.-3 Intermediate Depth Stiff ≤ 0.8 s Soil depth > 100 ft. and < 200 ft.SoilD-1 Deep Stiff Holocene Soil,either S (Sand) or C(Clay)≤ 1.4 s Soil depth > 200 ft. and < 700 ft. Sand haslow fines content (< 15%) or non-plasticfines (PI < 5). Clay has high fines content(> 15%) and plastic fines (PI > 5).-2 Deep Stiff PleistoceneSoil, S (Sand) or C (Clay)≤ 1.4 s Soil depth > 200 ft. and < 700 ft. See D 1for S or C sub-categorization.-3 Very Deep Stiff Soil ≤ 2 s Soil depth > 700 ft.E-1 Medium Depth S<strong>of</strong>t Clay ≤ 0.7 s Thickness <strong>of</strong> s<strong>of</strong>t clay layer 10 ft. to 40 ft.-2 Deep S<strong>of</strong>t Clay Layer ≤ 1.4 s Thickness <strong>of</strong> s<strong>of</strong>t clay layer > 40 ft.FSpecial, e.g., PotentiallyLiquefiable Sand or Peat≈ 1 sHolocene loose sand with high water table(z w ≤ 20ft.) or organic peats.