Laserfiche WebLink
Repon of Soils Investigation <br />2215 South Standard Ave., Proposed Addition <br />anta ali a <br />:l <br />.l <br />-I <br />l <br />repeatable high bedrock acceleration. The estimated repeatable acceleration is <br />0.299. Design of structures for seismic loading should comply with the <br />requirements of governing jurisdictions, applicable building codes, and practices <br />ofthe Association of Structural Engineers ofCalifornia. <br />8.45 I .iquefaction Evaluation <br />Liquefaction occurs when saturated fine grained sands or silts lose their physical <br />strengths during shaking and behave as a liquid. This is due to loss of point-to- <br />point grain contact and transfer of normal stress to pore water. Liquefaction <br />potential is a function of water level, soil type, material gradation, relative <br />density, and probable intensity and duration ofground shaking. <br />According to the referenced geologic maps, the subject site is located in a <br />liquefaction zone. Based on in-place density, physical grain size characteristics <br />and depth to groundwater, liquefaction potential is considered too be high. <br />Senlement, due to liquefaction during the anticipated seismic events would be on <br />the order of 0.9 inches. <br />8..{.6 Seismic Settlement Evaluation <br />Seismic settlement occurs when loose to medium dense granular soils densify <br />during seismic events. The underlying deposits were generally found to be stiffto <br />very stiff; therefore, are not considered likely to experience significant seismic <br />settlement- <br />l <br />Page l1of27 <br />Job No. 40-0613 <br />Anril 5 l9QQ <br />I