{"id":3538,"date":"2026-04-14T13:16:47","date_gmt":"2026-04-14T11:16:47","guid":{"rendered":"https:\/\/www.igeas.com\/?post_type=realizzazioni&#038;p=3538"},"modified":"2026-04-24T19:31:19","modified_gmt":"2026-04-24T17:31:19","slug":"state-road-no-29-del-colle-di-cadibona-construction-works-of-the-altare-bypass-province-of-savona-between-km-138-00-and-km-141-750","status":"publish","type":"realizzazioni","link":"https:\/\/www.igeas.com\/en\/projects\/state-road-no-29-del-colle-di-cadibona-construction-works-of-the-altare-bypass-province-of-savona-between-km-138-00-and-km-141-750\/","title":{"rendered":"State Road No. 29 \u201cdel Colle di Cadibona\u201d \u2013 Construction works of the Altare bypass (Province of Savona) between km 138.00 and km 141.750."},"content":{"rendered":"<p><strong>Project objective<\/strong><\/p>\n<p>As part of the works for the construction of the Altare bypass (SV), our Company provided the executive construction design on behalf of the contractor.<br \/>\nIn addition to the design activities, throughout all construction phases our Company provided the contractor with technical assistance and geotechnical consultancy, including excavation-face surveys and processing of data from the monitoring system.<\/p>\n<p><strong>Main works<\/strong><\/p>\n<p><em>\u201cRastello\u201d viaduct<\/em><br \/>\nThe Rastello viaduct deck is a prestressed reinforced-concrete structure and was built using precast segments installed with a launching gantry.<br \/>\nOverall length 415.60 m with spans of 46.0 m.<br \/>\nThe piers and abutments are reinforced concrete and were cast entirely in situ. The foundations are set directly on the rock substrate, where consolidation and rock-bolting works were provided. The tallest pier is approximately 65 m high.<\/p>\n<p><em>Gazzana viaduct<\/em><br \/>\nThe Gazzana viaduct deck is a prestressed reinforced-concrete structure built with precast girders erected by mobile crane.<br \/>\nOverall length 415.60 m with spans of 46.0 m.<br \/>\nThe piers and abutments are reinforced concrete and were cast entirely in situ. The foundations are set directly on the rock substrate, where consolidation and rock-bolting works were provided. The tallest pier is approximately 65 m high.<\/p>\n<p><em>\u201cFugona\u201d tunnel<\/em><br \/>\nIt comprises two natural tunnel sections with only a short cut-and-cover section in between, effectively forming a single tunnel with an overall length of approximately 2,000 m.<br \/>\nGeotechnical investigations were integrated by excavation of a \u201cpilot bore\u201d with TBM (Tunnel Boring Machine) to verify the difficult geomechanical conditions due to a rock mass with extremely poor mechanical characteristics, which had already caused numerous instabilities in the area. This made it possible to define the most suitable excavation and support methods, as well as the first-stage and final lining.<\/p>\n","protected":false},"featured_media":1391,"parent":0,"template":"","settore":[26,30],"class_list":["post-3538","realizzazioni","type-realizzazioni","status-publish","has-post-thumbnail","hentry","settore-road-infrastructures","settore-underground-works"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>State Road No. 29 \u201cdel Colle di Cadibona\u201d \u2013 Construction works of the Altare bypass (Province of Savona) between km 138.00 and km 141.750. - IGEAS Engineering S.r.l.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.igeas.com\/en\/projects\/state-road-no-29-del-colle-di-cadibona-construction-works-of-the-altare-bypass-province-of-savona-between-km-138-00-and-km-141-750\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"State Road No. 29 \u201cdel Colle di Cadibona\u201d \u2013 Construction works of the Altare bypass (Province of Savona) between km 138.00 and km 141.750. - IGEAS Engineering S.r.l.\" \/>\n<meta property=\"og:description\" content=\"Project objective As part of the works for the construction of the Altare bypass (SV), our Company provided the executive construction design on behalf of the contractor. In addition to the design activities, throughout all construction phases our Company provided the contractor with technical assistance and geotechnical consultancy, including excavation-face surveys and processing of data [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.igeas.com\/en\/projects\/state-road-no-29-del-colle-di-cadibona-construction-works-of-the-altare-bypass-province-of-savona-between-km-138-00-and-km-141-750\/\" \/>\n<meta property=\"og:site_name\" content=\"IGEAS Engineering S.r.l.\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-24T17:31:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.igeas.com\/wp-content\/uploads\/2026\/03\/035_LOMBARDINI_Variante_SS29_Altare-0-13.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"768\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.igeas.com\\\/en\\\/projects\\\/state-road-no-29-del-colle-di-cadibona-construction-works-of-the-altare-bypass-province-of-savona-between-km-138-00-and-km-141-750\\\/\",\"url\":\"https:\\\/\\\/www.igeas.com\\\/en\\\/projects\\\/state-road-no-29-del-colle-di-cadibona-construction-works-of-the-altare-bypass-province-of-savona-between-km-138-00-and-km-141-750\\\/\",\"name\":\"State Road No. 29 \u201cdel Colle di Cadibona\u201d \u2013 Construction works of the Altare bypass (Province of Savona) between km 138.00 and km 141.750. - 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