{"id":178,"date":"2015-02-04T08:30:46","date_gmt":"2015-02-04T16:30:46","guid":{"rendered":"http:\/\/research.engineering.ucdavis.edu\/gpa\/?page_id=178"},"modified":"2015-02-17T15:31:59","modified_gmt":"2015-02-17T23:31:59","slug":"alluvial-deposit-2","status":"publish","type":"page","link":"https:\/\/research.engineering.ucdavis.edu\/gpa\/site-characterization\/alluvial-deposit-2\/","title":{"rendered":"Alluvial Deposit-2"},"content":{"rendered":"<h2>Sacramento<\/h2>\n<hr \/>\n<p>These photos are from an alluvial deposit of sand and gravel, as exposed in an aggregate mining pit in Sacramento, California, in 1997. The excavation allows us to see the subsurface stratigraphy in its entirety. Imagine trying to infer the stratigraphy using SPT samples taken every 1.5-m in boreholes spaced 15-30 m apart. This simple exercise is a valuable learning opportunity and worth repeating every time you come a across a cut-exposure of soil or rock. This is because Geotechnical engineers must understand the limitations of most site characterization methods for capturing certain subsurface details, and understand how the resulting uncertainties affect different design procedures.<\/p>\n<div id=\"attachment_327\" style=\"width: 181px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P1-Labeled.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-327\" class=\"wp-image-327 \" src=\"http:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P1-Labeled-198x300.jpg\" alt=\" This cut exposure in the pit wall shows 1-2 m of silty clay near the ground surface, underlain by interbedded layers of sand, gravelly sand, and sandy gravel.\" width=\"171\" height=\"259\" srcset=\"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P1-Labeled-198x300.jpg 198w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P1-Labeled-99x150.jpg 99w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P1-Labeled.jpg 487w\" sizes=\"auto, (max-width: 171px) 100vw, 171px\" \/><\/a><p id=\"caption-attachment-327\" class=\"wp-caption-text\">This cut exposure in the pit wall shows 1-2 m of silty clay near the ground surface, underlain by interbedded layers of sand, gravelly sand, and sandy gravel.<\/p><\/div>\n<div id=\"attachment_325\" style=\"width: 269px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P2-Labeled.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-325\" class=\"wp-image-325 \" src=\"http:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P2-Labeled-300x198.jpg\" alt=\" Close-up view of the above exposure. Notice the interlayering of the sand, gravelly sand, and sandy gravel lenses.\" width=\"259\" height=\"171\" srcset=\"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P2-Labeled-300x198.jpg 300w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P2-Labeled-227x150.jpg 227w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P2-Labeled-150x99.jpg 150w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P2-Labeled.jpg 741w\" sizes=\"auto, (max-width: 259px) 100vw, 259px\" \/><\/a><p id=\"caption-attachment-325\" class=\"wp-caption-text\">Close-up view of the above exposure. Notice the interlayering of the sand, gravelly sand, and sandy gravel lenses.<\/p><\/div>\n<div id=\"attachment_326\" style=\"width: 181px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P3-Labeled.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-326\" class=\"wp-image-326 \" src=\"http:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P3-Labeled-197x300.jpg\" alt=\"Another cut exposure.\" width=\"171\" height=\"260\" srcset=\"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P3-Labeled-197x300.jpg 197w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P3-Labeled-98x150.jpg 98w, https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-content\/uploads\/sites\/43\/2015\/02\/Alluvial-2-P3-Labeled.jpg 491w\" sizes=\"auto, (max-width: 171px) 100vw, 171px\" \/><\/a><p id=\"caption-attachment-326\" class=\"wp-caption-text\">Another cut exposure.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<h2>Sacramento<\/h2>\n<p>These photos are from an alluvial deposit of sand and gravel, as exposed in an aggregate mining pit in Sacramento, California, in 1997. The excavation allows us to see the subsurface stratigraphy in its entirety. Imagine trying to infer the stratigraphy using SPT samples taken every 1.5-m in boreholes  \u2026 <a href=\"https:\/\/research.engineering.ucdavis.edu\/gpa\/site-characterization\/alluvial-deposit-2\/\"> Continue reading <span class=\"meta-nav\">&rarr; <\/span><\/a><\/p>\n","protected":false},"author":10,"featured_media":0,"parent":41,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-twocolumns-left.php","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-178","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/pages\/178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/comments?post=178"}],"version-history":[{"count":2,"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/pages\/178\/revisions"}],"predecessor-version":[{"id":324,"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/pages\/178\/revisions\/324"}],"up":[{"embeddable":true,"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/pages\/41"}],"wp:attachment":[{"href":"https:\/\/research.engineering.ucdavis.edu\/gpa\/wp-json\/wp\/v2\/media?parent=178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}