{"id":3952,"date":"2025-05-12T11:58:15","date_gmt":"2025-05-12T11:58:15","guid":{"rendered":"https:\/\/eurohinca.com\/?p=3952"},"modified":"2026-03-12T12:11:51","modified_gmt":"2026-03-12T12:11:51","slug":"what-are-the-characteristics-and-benefits-of-open-shield-excavation","status":"publish","type":"post","link":"https:\/\/eurohinca.com\/en\/cuales-son-las-caracteristicas-y-beneficios-de-la-excavacion-con-escudo-abierto\/","title":{"rendered":"What are the features and benefits of open shield excavation?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"3952\" class=\"elementor elementor-3952\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d6327ef e-flex e-con-boxed e-con e-parent\" data-id=\"d6327ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0d3dfe2 elementor-widget elementor-widget-text-editor\" data-id=\"0d3dfe2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"87\" data-end=\"296\">The <a href=\"https:\/\/eurohinca.com\/en\/open-shield\/\"><strong data-start=\"90\" data-end=\"123\">open shield excavation<\/strong><\/a> (open shield) is a tunneling method in which the cutting wheel works in air, without internal pressure in the chamber. This gives it several particularities and advantages:<\/p><p class=\"\" data-start=\"298\" data-end=\"331\"><strong data-start=\"298\" data-end=\"329\">Main characteristics<\/strong><\/p><ul data-start=\"332\" data-end=\"919\"><li class=\"\" data-start=\"332\" data-end=\"470\"><p class=\"\" data-start=\"334\" data-end=\"470\"><strong data-start=\"334\" data-end=\"359\">Unpressurized chamber<\/strong>The digging face remains visible, which facilitates inspections and replacement of cutting discs.<\/p><\/li><li class=\"\" data-start=\"471\" data-end=\"606\"><p class=\"\" data-start=\"473\" data-end=\"606\"><strong data-start=\"473\" data-end=\"495\">Dry evacuation<\/strong>The debris is removed by conveyor belts or wagons, reducing sludge management and bentonite consumption.<\/p><\/li><li class=\"\" data-start=\"607\" data-end=\"766\"><p class=\"\" data-start=\"609\" data-end=\"766\"><strong data-start=\"609\" data-end=\"630\">Rigid structure<\/strong>The shield acts as a temporary support ring, making it possible to advance in stable rock masses without the use of compensation fluids.<\/p><\/li><li class=\"\" data-start=\"767\" data-end=\"919\"><p class=\"\" data-start=\"769\" data-end=\"919\"><strong data-start=\"769\" data-end=\"799\">Compatibility with keystones<\/strong>Segmented lining can be installed immediately behind the TBM if waterproofing is required.<\/p><\/li><\/ul><p class=\"\" data-start=\"921\" data-end=\"943\"><strong data-start=\"921\" data-end=\"941\">Key benefits<\/strong><\/p><ol data-start=\"944\" data-end=\"1542\"><li class=\"\" data-start=\"944\" data-end=\"1052\"><p class=\"\" data-start=\"947\" data-end=\"1052\"><strong data-start=\"947\" data-end=\"975\">Lower operating cost<\/strong> on competent soils by avoiding slurry pumps and separation plants.<\/p><\/li><li class=\"\" data-start=\"1053\" data-end=\"1170\"><p class=\"\" data-start=\"1056\" data-end=\"1170\"><strong data-start=\"1056\" data-end=\"1086\">Simplified maintenance<\/strong>The cutting discs are accessible, thus shortening downtimes.<\/p><\/li><li class=\"\" data-start=\"1171\" data-end=\"1304\"><p class=\"\" data-start=\"1174\" data-end=\"1304\"><strong data-start=\"1174\" data-end=\"1204\">Reduced environmental impact<\/strong>The sludge footprint and associated logistics are minimized by not generating bentonite suspensions.<\/p><\/li><li class=\"\" data-start=\"1305\" data-end=\"1407\"><p class=\"\" data-start=\"1308\" data-end=\"1407\"><strong data-start=\"1308\" data-end=\"1340\">Superior feed rate<\/strong> when the geology is homogeneous, optimizing the construction time.<\/p><\/li><li class=\"\" data-start=\"1408\" data-end=\"1542\"><p class=\"\" data-start=\"1411\" data-end=\"1542\"><strong data-start=\"1411\" data-end=\"1434\">Security and control<\/strong>direct visibility of the front facilitates early detection of loose blocks or lithological changes.<\/p><\/li><\/ol><p class=\"\" data-start=\"1544\" data-end=\"1746\">In summary, the <a href=\"https:\/\/eurohinca.com\/en\/open-shield\/\"><strong>open shield<\/strong><\/a> is the ideal choice for tunnels in hard rock or self-supporting terrains where a clean, fast process with lower operating costs compared to pressurized methods is required.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>La excavaci\u00f3n con escudo abierto (open shield) es un m\u00e9todo de tunelaci\u00f3n en el que la rueda de corte trabaja al aire, sin presi\u00f3n interna en la c\u00e1mara. Esto le confiere varias particularidades y ventajas: Caracter\u00edsticas principales C\u00e1mara sin presurizar: el frente de excavaci\u00f3n se mantiene visible, lo que facilita inspecciones y sustituci\u00f3n de discos [&hellip;]<\/p>\n","protected":false},"author":80,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[146],"tags":[],"class_list":["post-3952","post","type-post","status-publish","format-standard","hentry","category-preguntas-frecuentes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Escudo abierto: caracter\u00edsticas y ventajas<\/title>\n<meta name=\"description\" content=\"Descubre c\u00f3mo el m\u00e9todo de escudo abierto reduce costes, simplifica mantenimiento y acelera t\u00faneles en roca sin lodos benton\u00edticos.\" \/>\n<meta name=\"robots\" content=\"index, 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