15 ATTACHMENT 9 - Laserfiche WebLink

Project No. 9929.G Geotechnical Investigation/Vineyard Avenue, Pleasanton 8 August 2003 indicate sufficient saturation. The subgrade for other flatwork slabs should be thoroughly wetted prior to the pouring of concrete. b. Driveway slabs should be underlain by a minimum of 4 inches of angular gravel or clean crushed rock material placed between the finished subgrade and the slabs to serve as a capillary break between the subsoil and the slab. See the "Guide Specifications For Rock Under Floor Slabs", Appendix C. c. The slabs should be adequately reinforced as determined by the project structural engineer for the anticipated loads. The reinforcement shall be placed in the center of the slab unless otherwise designated by the design engineer. d. All exterior flatwork slabs should be poured structurally independent of the foundations. A 30-pound felt strip, expansive joint material, or other positive separator should be provided around the edge of all floating slabs to prevent bond to the structure foundation. Retaining Walls and Sound Walls 51. Any retaining walls that are to be incorporated into the development should be designed to resist lateral pressures exerted from a media having an equivalent fluid weight as follows. ~radier~t of Equivalent Fluid Weight (p c f.~~' ~oeffic~,nt = ~~~` ~ B~cl` S1npe~'` ~Y ~" ~ ~~ `'' _ ~ ~ `'j s r F' 7 ofFriction UIU'es~rained, x~; Passive '` ~ ~ Condrtian ~ ~ . Resistance: : ~" . ~ E Horizontal 45 300 0.30 2:1 65 300 0.30 TERRASEARCH, inc. Page 25 of 53