{"id":122271,"date":"2019-09-03T14:19:23","date_gmt":"2019-09-03T12:19:23","guid":{"rendered":"https:\/\/www.ferrovial.com\/business\/projects\/espino-tunnel\/"},"modified":"2024-11-18T17:33:59","modified_gmt":"2024-11-18T16:33:59","slug":"espino-tunnel","status":"publish","type":"project","link":"https:\/\/www.ferrovial.com\/en-gb\/business\/projects\/espino-tunnel\/","title":{"rendered":"Espi\u00f1o Tunnel (Madrid-Galicia high-speed railway line)"},"content":{"rendered":"    <m-hero type=\"detail\">\n            <c-breadcrumb label-text=\"Breadcrumb\" slot=\"breadcrumbs\" type='1' align='left left' wrap='wrapped wrapped' aria-label='You came from Projects'>\n                        <ol>\n\n                                                            <li><a href=\"https:\/\/www.ferrovial.com\/en-gb\/\" title=\"Ferrovial\">Ferrovial<\/a><\/li>\n                                                                        <li><a href=\"https:\/\/www.ferrovial.com\/en-gb\/business-lines\/\" 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style=\"object-position: center center;\">\n            <\/picture>\n                \n        <section slot=\"hero\">\n            <article bgtype='image' path='2'>\n                <h1>Espi\u00f1o Tunnel<\/h1>\n                                    <ul class=\"icons\">\n                                                        <li>\n                                    <a href='https:\/\/www.ferrovial.com\/en-gb\/business-lines\/construction\/' title='Construction' icon='construction'>\n                                    <\/a>\n                                <\/li>\n                                                    <\/ul>\n                                <\/article>\n        <\/section>\n    <\/m-hero>\n\n    \n\n    <m-project-detail pathfront=\"1\" pathback=\"2\" paginationseparator=\"of\">\n        <img decoding=\"async\" class=\"dots\" slot=\"bg\" src=\"https:\/\/www.ferrovial.com\/wp-content\/themes\/global\/front\/dist\/static\/img\/dots.svg\" alt=\"\">\n\n                        <c-icon slot=\"location\" icon=\"location\">\n                <\/c-icon>\n                <p slot=\"location\">\n                    Orense, Spain                <\/p>\n                                    <p slot=\"tags\" text=\"Innovation\">\n                    <\/p>\n                                        <p slot=\"tags\" text=\"Sustainability\">\n                    <\/p>\n                                    <ul slot=\"cypher\">\n                    \n                            <li>\n                                                                <div><span >8<\/span><div>.10 km<\/div><\/div>\n                                                                    <p>Length<\/p>\n                                                            <\/li>\n                            \n                            <li>\n                                                                <div><span >35 <\/span><div>t<\/div><\/div>\n                                                                    <p>Tecnosol<\/p>\n                                                            <\/li>\n                            \n                            <li>\n                                                                <div><span >70<\/span><div>%<\/div><\/div>\n                                                                    <p>Non-hazardous waste<\/p>\n                                                            <\/li>\n                            \n                            <li>\n                                                                <div><span >17000<\/span><div>m\u00b3<\/div><\/div>\n                                                                    <p>of Tecnosol<\/p>\n                                                            <\/li>\n                                            <\/ul>\n                                <c-icon slot=\"carouselIcon\" icon=\"airports\">\n                <\/c-icon>\n                    <\/m-project-detail>\n    \n\n\n<m-wysiwig class=\"wp-block-components-wysiwyg\"><div slot=\"maincontent\">    <p class=\"intro\">The project consists of building 8.1 km of rail bed for the new high-speed railway line linking Madrid and Galicia, within the 7.9 km Espi\u00f1o Tunnel. The work, with a budget of 100 million euros, is located in the province of Orense.<\/p>\n    \n\n\n<h2 class=\"wp-block-heading\">Environmental project: Tecnosol<\/h2>\n\n\n\n<p><strong>Pyrite (FeS<sub>2<\/sub>)<\/strong>&nbsp;and&nbsp;<strong>heavy metals<\/strong>&nbsp;were expected to be found during excavation of the right-hand bore of the Espi\u00f1o tunnel in Orense (Galicia). These materials cause hyper acidification of water due to oxidation, and cause the release of heavy metals into the environment.&nbsp;We are applying a customized artificial soil solution to treat the pyrite material from the tunnel. It is called Tecnosol.<\/p>\n\n\n\n<p>This new technology, developed by the&nbsp;<a href=\"http:\/\/www.usc.es\/\">University of Santiago de Compostela<\/a>, is <strong>more effective than the solution envisaged in the original plan<\/strong>. It also involves comprehensive oversight and tracking of the excavated material and leached waters, which will continue for a period of five years after the tunnel is delivered in order to ensure tailing piles are stable and the new methodology is effective.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Environmental advantages of Tecnosol<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Extraction and transport of over 32,000 m<sup>3<\/sup>\u00a0of limestone material is avoided (there are no quarries for this material in the region).<\/li>\n\n\n\n<li>Greater efficiency in the control of leachate.<\/li>\n\n\n\n<li>Guarantee of chemical stability in landfills, avoiding leaching of acidified water.<\/li>\n\n\n\n<li>Reduction in carbon emissions.<\/li>\n<\/ul>\n\n\n\n<p style=\"font-size:18px\">The Tecnosoles used are manufactured in Galicia, using&nbsp;<strong>70% of non-hazardous waste<\/strong>. Works are expected to last a further 5 years in order to guarantee adequacy of treatment and stability of the areas being treated. According to projections, approximately <strong>35,000 tons of technical soil <\/strong>will be used for<strong> a total of 1.2 million cubic metres of excavated materials<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Energy Efficiency Measures<\/strong><\/h2>\n\n\n\n<p>The main aim of this set of actions is the efficient use of energy and to reduce site dependency on generators and other sources of diesel consumption.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Use of\u00a0<strong>solar panels<\/strong>\u00a0to supply the hut and weighbridge. Two panels generate\u00a0<strong>320\u00a0W\/day<\/strong>, and there is a\u00a0<strong>storage battery<\/strong>\u00a0providing an output of\u00a0<strong>230\u00a0V<\/strong>\u00a0and\u00a0<strong>24\u00a0V<\/strong>. The system further includes a\u00a0<strong>light sensor<\/strong>\u00a0which automatically turns off the inside lighting when there is sufficient natural light.<\/li>\n\n\n\n<li>Installation of LED lights in the\u00a0<strong>7,900-metre-long<\/strong>\u00a0tunnel. These lights consume\u00a0<strong>only 24\u00a0W, three times less than a fluorescent light<\/strong>, and guarantee at least the same light intensity within the tunnel. They can be connected in series, which further simplifies work. High impact resistance means that there is minimal replacement necessary.<\/li>\n\n\n\n<li><strong>Extension of electricity supply networks\u00a0<\/strong>from population centres: two generators and two light towers using diesel engines were removed, whilst maintaining electricity supply to the facilities and huts at the mouth of the tunnel, as well as lighting of the platform.<\/li>\n\n\n\n<li>Fitting of\u00a0<strong>timers<\/strong>\u00a0and\u00a0<strong>light sensors<\/strong>\u00a0in outside areas where lighting is provided.<\/li>\n\n\n\n<li>Heating of the site office using a\u00a0<strong>pellet stove<\/strong>, removing the existing oil boiler.<\/li>\n\n\n\n<li>Installation of a\u00a0<strong>picoturbine<\/strong>\u00a0for electricity generation to use the treated water from the tunnel (60 m<sup>3<\/sup>\/h and a 16 m drop between basin and discharge). The electricity generated feeds the water treatment plant itself.<strong>\u00a0In 300 days, 408.5 kWh have been generated<\/strong>.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Reuse of water from runoff basins<\/strong><\/h2>\n\n\n\n<p><strong>Efficient use of water is a priority aim<\/strong>, which implies that all available initiatives for reuse and saving of water must be applied.<\/p>\n\n\n\n<p>The water used in this building site is extracted mainly from&nbsp;<strong>superficial sources (rivers),<\/strong>&nbsp;6,044 m<sup>3<\/sup>, and&nbsp;<strong>underground sources (wells),<\/strong>&nbsp;42,167 m<sup>3<\/sup>. Total volume of water used was 150,415 m<sup>3<\/sup>.<\/p>\n\n\n\n<p>The digging of a tunnel generates large amounts of water through infiltration and the tunnelling work itself. This water, which tends to have a large content of solid matter, is collected in basins and vertical tanks for treatment, which consists in the decantation and cleaning of the water and an adjustment of its pH to comply with accepted discharge parameters.<\/p>\n\n\n\n<p>However, instead of being discharged back into the rivers, much of this water is&nbsp;<strong>reused<\/strong>&nbsp;elsewhere on site, thereby considerably&nbsp;<strong>reducing the volume of water collected<\/strong>&nbsp;and the corresponding effect on the environment.<\/p>\n\n\n\n<p>The 102,204 m<sup>3<\/sup> of recycled water produced was&nbsp;used as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>109 m<sup>3<\/sup> in water for\u00a0<strong>hydro seeding.<\/strong><\/li>\n\n\n\n<li>700 m<sup>3<\/sup> for watering\u00a0<strong>newly planted areas.<\/strong><\/li>\n\n\n\n<li>A small amount set aside for\u00a0<strong>fire prevention\u00a0<\/strong>(firefighting helicopter).<\/li>\n\n\n\n<li>Close to 100% of the water used for\u00a0<strong>cleaning of roads and elimination of dust<\/strong>.<\/li>\n<\/ul>\n<\/div><\/m-wysiwig>\n\n\n    <m-gallery :translations='{\n        &quot;prev&quot;:&quot;Previous&quot;,\n        &quot;next&quot;:&quot;Next&quot;,\n        &quot;paginationseparator&quot;:&quot;of&quot;,\n        &quot;close&quot;:&quot;Close&quot;\n    }' class='gutenberg'>\n\n    <div slot=\"header\">\n                    <p>Description placeholder<\/p>\n                <\/div>\n\n                    <div slot=\"carouselItem\" v-lazy:background-image=\"'https:\/\/static.ferrovial.com\/wp-content\/uploads\/2019\/09\/13134911\/tunel-del-espino-2-1280x720.jpg'\">\n                                    <\/div>\n                                <div slot=\"carouselItem\" v-lazy:background-image=\"'https:\/\/static.ferrovial.com\/wp-content\/uploads\/2019\/09\/13134915\/tunel-del-espino-3-1280x720.jpg'\">\n                                    <\/div>\n                                <div 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","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":83191,"menu_order":0,"template":"","nivel-1":[5494],"nivel-2":[6288,6105,5840,6619,10245,6019,6634,5862,5988,5853],"nivel-3":[5889],"nivel-4":[6031,5890],"nivel-5":[7728],"class_list":["post-122271","project","type-project","status-publish","has-post-thumbnail","hentry","nivel-1-construction-en-gb","nivel-2-alternative-energy-en-gb","nivel-2-energy-en-gb","nivel-2-energy-efficiency-en-gb","nivel-2-environment-en-gb","nivel-2-high-speed-rail-en-gb-2","nivel-2-infrastructures-en-gb","nivel-2-projects-en-gb","nivel-2-rail-transport-en-gb","nivel-2-water-en-gb","nivel-2-works-en-gb","nivel-3-spain-en-gb","nivel-4-galicia-en-gb","nivel-4-madrid-en-gb","nivel-5-ferrovial-construction-en-gb"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Espi\u00f1o Tunnel (Madrid-Galicia high-speed railway line) - 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