{"id":1395,"date":"2014-05-27T15:46:11","date_gmt":"2014-05-27T15:46:11","guid":{"rendered":"http:\/\/theflatironblog.com\/?p=1395"},"modified":"2016-07-28T16:18:10","modified_gmt":"2016-07-28T16:18:10","slug":"field-note-sorrento-miramar-double-track-phase-one-2","status":"publish","type":"post","link":"https:\/\/www.flatironcorp.com\/news\/field-note-sorrento-miramar-double-track-phase-one-2\/","title":{"rendered":"Field Note: Sorrento to Miramar Double Track, Phase One"},"content":{"rendered":"<p><strong>San Diego, Calif. &#8211;\u00a0<\/strong>The Sorrento to Miramar Double Track project is the first of two phases of construction to speed passenger and freight rail services on the Los Angeles-San Diego-San Luis Obispo rail corridor. The project involves straightening part of the slowest, steepest, and highest-curve territory of any segment along the corridor. A wooden trestle bridge built in the early 1940s will also be replaced, and a new track crossover will be installed.<\/p>\n<p>Flatiron proposed using innovative permanent soldier pile tieback walls\u00a0on a portion of the project to owner SANDAG as a value engineering alternative to the conventional reinforced concrete walls, saving both time and money. The alternative wall design consisted of drilled-in soldier piles with temporary treated timber lagging between, and a permanent rock sculpted shotcrete architectural facing. Lateral support for the wall was provided by permanent tiebacks at taller wall heights. This wall system is traditionally constructed as a \u201ccut\u201d wall but was constructed successfully and economically as a \u201cfill\u201d wall in this instance. Project completion is expected in April 2014.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>San Diego, Calif. &#8211;\u00a0The Sorrento to Miramar Double Track project is the first of two phases of construction to speed passenger and freight rail services on the&hellip;<\/p>\n","protected":false},"author":3,"featured_media":1396,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[40],"tags":[82,130,147,179,198,254,268,316,334,367,374,377,390],"class_list":["post-1395","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-project-news","tag-bridge","tag-construction","tag-double-track","tag-flatiron","tag-freight","tag-los-angelea","tag-miramar","tag-passenger","tag-rail-corridor","tag-san-diego","tag-san-luis-obispo","tag-sandag","tag-sorrento"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/posts\/1395"}],"collection":[{"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/comments?post=1395"}],"version-history":[{"count":0,"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/posts\/1395\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/media\/1396"}],"wp:attachment":[{"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/media?parent=1395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/categories?post=1395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.flatironcorp.com\/wp-json\/wp\/v2\/tags?post=1395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}