Laserfiche WebLink
Repon of Soils Investigation <br />22i5 South Standard Ave,, Proposed Addition <br />Santa Ana. California <br />Page 23 of27 <br />Job No. 40-0613 <br />ils. 1999 <br />The following preliminary structural pavement section is designed according to <br />Caltrans Department of Transponation Highway Manual (Method 301) for <br />flexible pavements based on the preliminary design R-Value of 10. Presented <br />below are the structural pavement sections for flexible pavements lor auto parking <br />areas <br />It is recommended that subsequent R-Value testing be performed following <br />parking and drive area grading in order to provide final structural pavement <br />section recommendations. <br />We recommend that soils underlying all proposed pavement areas be prepared in <br />the following manner. Loose or disturbed subgrade soils should be removed to <br />the depth of competent materials. Exposed soils should be moisture conditioned <br />and compacted to 95 percent ofthe maximum dry density (ASTM D-1557). Soils <br />should then be compacted in lifts not exceeding 8" to subgrade elevation at 95 <br />percent of the maximum dry densit1,. All Class II Base materials should be <br />compacted to at least 95 percent oflaboratory maximum densin'(ASTM D-1557). <br />Traffic Area Traffic Index A.C. Thickness <br />(in) <br />Auto Travel Lanes and <br />Parking Area <br />3.5 8 <br />I0.5.2 .{sphalt Par ement Design <br />I Class tr Base <br />] <br />Thickness (in) <br />I <br />I