{"id":4744,"date":"2025-11-04T11:22:47","date_gmt":"2025-11-04T11:22:47","guid":{"rendered":"https:\/\/eurohinca.com\/?p=4744"},"modified":"2025-11-04T11:24:51","modified_gmt":"2025-11-04T11:24:51","slug":"when-intermediate-spindle-maintenance-shutdowns-are-appropriate-and-how-they-can-be-scheduled-without-affecting-deadlines","status":"publish","type":"post","link":"https:\/\/eurohinca.com\/en\/cuando-conviene-paradas-intermedias-de-mantenimiento-del-cabezal-y-como-se-programan-sin-afectar-plazos\/","title":{"rendered":"When is it convenient to make intermediate maintenance stops for the spindle and how can they be scheduled without affecting deadlines?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"4744\" class=\"elementor elementor-4744\" 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 data-start=\"111\" data-end=\"555\">In works of <strong data-start=\"139\" data-end=\"220\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/pipe-jacking-2\/\" target=\"_new\" rel=\"noopener\" data-start=\"141\" data-end=\"218\">pipe jacking (microtunneling)<\/a><\/strong> y <strong data-start=\"223\" data-end=\"238\">Direct Pipe<\/strong>, The intermediate stops are justified by <strong data-start=\"282\" data-end=\"306\">head wear<\/strong>, <strong data-start=\"308\" data-end=\"336\">torque\/thrust trends<\/strong>, <strong data-start=\"338\" data-end=\"353\">abrasiveness<\/strong> y <strong data-start=\"356\" data-end=\"382\">pressure conditions<\/strong>. They are programmed in <strong data-start=\"400\" data-end=\"425\">planned windows<\/strong> (logistics\/HSE) to inspect, replace tooling, regrease and recalibrate, maintaining the <strong data-start=\"519\" data-end=\"539\">average production<\/strong> of the schedule.<\/p><h2 data-start=\"562\" data-end=\"608\">Objective signals for deciding to stop<\/h2><ul data-start=\"609\" data-end=\"1279\"><li data-start=\"609\" data-end=\"764\"><p data-start=\"611\" data-end=\"764\"><strong data-start=\"611\" data-end=\"637\">Machine trends:<\/strong> sustained increase in <strong data-start=\"662\" data-end=\"669\">par<\/strong> y <strong data-start=\"672\" data-end=\"682\">thrust<\/strong>, drop of <strong data-start=\"693\" data-end=\"703\">feed<\/strong> at equal set-point, increase of <strong data-start=\"734\" data-end=\"745\">consumption<\/strong> (foams\/sludge).<\/p><\/li><li data-start=\"765\" data-end=\"889\"><p data-start=\"767\" data-end=\"889\"><strong data-start=\"767\" data-end=\"793\">Terrain and abrasiveness:<\/strong> step by <strong data-start=\"801\" data-end=\"818\">gravels\/cobbles<\/strong>, sandstones or hard layers; index of <strong data-start=\"855\" data-end=\"870\">abrasiveness<\/strong> high in polls.<\/p><\/li><li data-start=\"890\" data-end=\"1017\"><p data-start=\"892\" data-end=\"1017\"><strong data-start=\"892\" data-end=\"919\">Pressure conditions:<\/strong> instability of <strong data-start=\"937\" data-end=\"958\">chamber pressure<\/strong> (EPB\/Slurry), level losses or abnormal leaks.<\/p><\/li><li data-start=\"1018\" data-end=\"1146\"><p data-start=\"1020\" data-end=\"1146\"><strong data-start=\"1020\" data-end=\"1048\">Geometry and tolerances:<\/strong> need for <strong data-start=\"1062\" data-end=\"1083\">recalibrate guidance<\/strong> (laser\/gyro) or fine corrections before a critical section.<\/p><\/li><li data-start=\"1147\" data-end=\"1279\"><p data-start=\"1149\" data-end=\"1279\"><strong data-start=\"1149\" data-end=\"1178\">Preventive maintenance:<\/strong> hours\/meters of service achieved for <strong data-start=\"1220\" data-end=\"1240\">spades\/cutters<\/strong>, <strong data-start=\"1242\" data-end=\"1252\">stamps<\/strong>, <strong data-start=\"1254\" data-end=\"1265\">lubrication<\/strong> y <strong data-start=\"1268\" data-end=\"1278\">bolts<\/strong>.<\/p><\/li><\/ul><h2 data-start=\"1286\" data-end=\"1350\">Indicative periodicity (adapt to DN\/L, terrain and method)<\/h2><ul data-start=\"1351\" data-end=\"1636\"><li data-start=\"1351\" data-end=\"1474\"><p data-start=\"1353\" data-end=\"1474\"><strong data-start=\"1353\" data-end=\"1411\">Very abrasive soils (gravels\/cobbles, siliceous sands):<\/strong> review every <strong data-start=\"1426\" data-end=\"1438\">60-150 m<\/strong> o <strong data-start=\"1441\" data-end=\"1452\">20-40 h<\/strong> of effective progress.<\/p><\/li><li data-start=\"1475\" data-end=\"1546\"><p data-start=\"1477\" data-end=\"1546\"><strong data-start=\"1477\" data-end=\"1510\">Mixed soils (alternations):<\/strong> each <strong data-start=\"1516\" data-end=\"1529\">150-300 m<\/strong> o <strong data-start=\"1532\" data-end=\"1543\">40-80 h<\/strong>.<\/p><\/li><li data-start=\"1547\" data-end=\"1636\"><p data-start=\"1549\" data-end=\"1636\"><strong data-start=\"1549\" data-end=\"1599\">Competent silts\/clays (low abrasiveness):<\/strong> each <strong data-start=\"1605\" data-end=\"1618\">300-600 m<\/strong> o <strong data-start=\"1621\" data-end=\"1633\">80-120 h<\/strong>.<\/p><\/li><\/ul><blockquote data-start=\"1637\" data-end=\"1808\"><p data-start=\"1639\" data-end=\"1808\">These are ranges <strong data-start=\"1650\" data-end=\"1667\">references<\/strong>The decision is made by <strong data-start=\"1693\" data-end=\"1706\">trend<\/strong> data (torque\/thrust\/pressure\/returns) and the <strong data-start=\"1751\" data-end=\"1761\">risk<\/strong> to face a critical stretch without intervention.<\/p><\/blockquote><h2 data-start=\"1815\" data-end=\"1882\">How to schedule them without penalizing the deadline (production tactics)<\/h2><ol data-start=\"1883\" data-end=\"2589\"><li data-start=\"1883\" data-end=\"2018\"><p data-start=\"1886\" data-end=\"2018\"><strong data-start=\"1886\" data-end=\"1913\">Synchronized windows:<\/strong> aligns the stop with <strong data-start=\"1935\" data-end=\"1955\">shift changes<\/strong>, arrival of <strong data-start=\"1968\" data-end=\"1982\">materials<\/strong> or emptying of <strong data-start=\"1996\" data-end=\"2015\">sludge plant<\/strong>.<\/p><\/li><li data-start=\"2019\" data-end=\"2191\"><p data-start=\"2022\" data-end=\"2191\"><strong data-start=\"2022\" data-end=\"2047\">Parallel work:<\/strong> while intervening in the spindle, run <strong data-start=\"2094\" data-end=\"2123\">topographic recalibration<\/strong>, <strong data-start=\"2125\" data-end=\"2148\">line inspection<\/strong>, pump maintenance and HSE review.<\/p><\/li><li data-start=\"2192\" data-end=\"2332\"><p data-start=\"2195\" data-end=\"2332\"><strong data-start=\"2195\" data-end=\"2232\">Pre-assembled spare parts packages:<\/strong> spades\/cutters, <strong data-start=\"2251\" data-end=\"2269\">stamp kits<\/strong>, and pernery ready in the well; minimizes downtime.<\/p><\/li><li data-start=\"2333\" data-end=\"2445\"><p data-start=\"2336\" data-end=\"2445\"><strong data-start=\"2336\" data-end=\"2365\">Timed checklists:<\/strong> target times per task (access, blocking, replacement, testing, start-up).<\/p><\/li><li data-start=\"2446\" data-end=\"2589\"><p data-start=\"2449\" data-end=\"2589\"><strong data-start=\"2449\" data-end=\"2474\">Intelligent Re-entry:<\/strong> takes up with <strong data-start=\"2486\" data-end=\"2503\">gentle ramps<\/strong> pressure\/torque and pressure\/torque <strong data-start=\"2540\" data-end=\"2562\">land balance<\/strong> to avoid settlements.<\/p><\/li><\/ol><h2 data-start=\"2596\" data-end=\"2646\">Safe sequence (HSE + QA\/QC) for shutdown<\/h2><ol data-start=\"2647\" data-end=\"3203\"><li data-start=\"2647\" data-end=\"2749\"><p data-start=\"2650\" data-end=\"2749\"><strong data-start=\"2650\" data-end=\"2676\">Blocking and consignment<\/strong> (LOTO) energy\/ferro-fluid; atmosphere verification at the front.<\/p><\/li><li data-start=\"2750\" data-end=\"2847\"><p data-start=\"2753\" data-end=\"2847\"><strong data-start=\"2753\" data-end=\"2777\">Stabilizes the front<\/strong>Pressure stable chamber (EPB\/Slurry) or wedges\/frame depending on method.<\/p><\/li><li data-start=\"2848\" data-end=\"2968\"><p data-start=\"2851\" data-end=\"2968\"><strong data-start=\"2851\" data-end=\"2881\">Inspection and replacements<\/strong>: head tooling, <strong data-start=\"2903\" data-end=\"2913\">stamps<\/strong>, <strong data-start=\"2915\" data-end=\"2937\">perimeter lubrication<\/strong>, bolts; adjustment of clearances.<\/p><\/li><li data-start=\"2969\" data-end=\"3060\"><p data-start=\"2972\" data-end=\"3060\"><strong data-start=\"2972\" data-end=\"2989\">Recalibration<\/strong>: guided <strong data-start=\"2998\" data-end=\"3019\">laser\/gyroscopic<\/strong>, total stations, total stations, sensor tests.<\/p><\/li><li data-start=\"3061\" data-end=\"3203\"><p data-start=\"3064\" data-end=\"3203\"><strong data-start=\"3064\" data-end=\"3086\">Testing and start-up<\/strong>: check-ups of <strong data-start=\"3100\" data-end=\"3109\">leaks<\/strong>, pressure and <strong data-start=\"3121\" data-end=\"3133\">returns<\/strong>; registration in the <strong data-start=\"3150\" data-end=\"3157\">ITP<\/strong> and updating of the <em data-start=\"3178\" data-end=\"3188\">as-built<\/em> of production.<\/p><\/li><\/ol><h2 data-start=\"3210\" data-end=\"3247\">Where to place them in the layout?<\/h2><ul data-start=\"3248\" data-end=\"3596\"><li data-start=\"3248\" data-end=\"3362\"><p data-start=\"3250\" data-end=\"3362\"><strong data-start=\"3250\" data-end=\"3278\">Before critical sections<\/strong>: low <strong data-start=\"3285\" data-end=\"3315\">sensitive infrastructures<\/strong>, areas, areas of <strong data-start=\"3326\" data-end=\"3337\">NF high<\/strong> or change of lithology.<\/p><\/li><li data-start=\"3363\" data-end=\"3479\"><p data-start=\"3365\" data-end=\"3479\"><strong data-start=\"3365\" data-end=\"3391\">After completing modules<\/strong>per beaten length (e.g., every N rings or meters of driving defined in the plan).<\/p><\/li><li data-start=\"3480\" data-end=\"3596\"><p data-start=\"3482\" data-end=\"3596\"><strong data-start=\"3482\" data-end=\"3507\">In operational accesses<\/strong>when the <strong data-start=\"3519\" data-end=\"3540\">well logistics<\/strong> allows fast lifting\/repositioning and safety of the equipment.<\/p><\/li><\/ul><h2 data-start=\"3603\" data-end=\"3662\">Control metrics (to decide to continue vs. stop)<\/h2><ul data-start=\"3663\" data-end=\"3946\"><li data-start=\"3663\" data-end=\"3719\"><p data-start=\"3665\" data-end=\"3719\"><strong data-start=\"3665\" data-end=\"3696\">Average torque\/thrust and peaks<\/strong> (weekly trend).<\/p><\/li><li data-start=\"3720\" data-end=\"3785\"><p data-start=\"3722\" data-end=\"3785\"><strong data-start=\"3722\" data-end=\"3743\">Chamber pressure<\/strong> y <strong data-start=\"3746\" data-end=\"3769\">flow rates<\/strong> (EPB\/Slurry).<\/p><\/li><li data-start=\"3786\" data-end=\"3865\"><p data-start=\"3788\" data-end=\"3865\"><strong data-start=\"3788\" data-end=\"3810\">Wear rate<\/strong> (number of tools\/cutters replaced per hour\/meter).<\/p><\/li><li data-start=\"3866\" data-end=\"3946\"><p data-start=\"3868\" data-end=\"3946\"><strong data-start=\"3868\" data-end=\"3890\">Geometric quality<\/strong> (axis\/slope deviation) and <strong data-start=\"3923\" data-end=\"3945\">land balance<\/strong>.<\/p><\/li><\/ul><h2 data-start=\"3953\" data-end=\"3988\">Necessary documents and means<\/h2><ul data-start=\"3989\" data-end=\"4311\"><li data-start=\"3989\" data-end=\"4072\"><p data-start=\"3991\" data-end=\"4072\"><strong data-start=\"3991\" data-end=\"4015\">Maintenance ITP<\/strong> with stopping points, responsible parties and target times.<\/p><\/li><li data-start=\"4073\" data-end=\"4142\"><p data-start=\"4075\" data-end=\"4142\"><strong data-start=\"4075\" data-end=\"4111\">Critical spare parts inventory<\/strong> (with batch traceability).<\/p><\/li><li data-start=\"4143\" data-end=\"4229\"><p data-start=\"4145\" data-end=\"4229\"><strong data-start=\"4145\" data-end=\"4158\">Registrations<\/strong> torque\/thrust\/pressure\/returns and <strong data-start=\"4192\" data-end=\"4201\">minutes<\/strong> signed intervention agreements.<\/p><\/li><li data-start=\"4230\" data-end=\"4311\"><p data-start=\"4232\" data-end=\"4311\"><strong data-start=\"4232\" data-end=\"4258\">Lifting\/lowering plan<\/strong> well insurance for consumables and head tools.<\/p><\/li><\/ul><p data-start=\"4313\" data-end=\"4591\">If you want us to set up your <strong data-start=\"4340\" data-end=\"4371\">preventive shutdown plan<\/strong> married to geotechnical and production targeting, our team of geotechnical <strong data-start=\"4440\" data-end=\"4536\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/technical-assistance-and-engineering\/\" target=\"_new\" rel=\"noopener\" data-start=\"4442\" data-end=\"4534\">Technical assistance and engineering<\/a><\/strong> can be integrated into the construction schedule and the ITP.<\/p><p data-start=\"4593\" data-end=\"4923\"><strong data-start=\"4593\" data-end=\"4654\">To expand programming criteria and best practices<\/strong>, it is useful to contrast with the <a href=\"https:\/\/www.ice.org.uk\/\"><strong data-start=\"4682\" data-end=\"4734\">BTS\/ICE <em data-start=\"4692\" data-end=\"4722\">Specification for Tunnelling<\/em> (3rd ed.)<\/strong><\/a>, which includes guidelines for maintenance and operational control in mechanized tunnels.<\/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>En obras de hinca de tuber\u00eda (microt\u00fanel) y Direct Pipe, las paradas intermedias se justifican por desgaste del cabezal, tendencias de par\/empuje, abrasividad y condiciones de presi\u00f3n. Se programan en ventanas planificadas (log\u00edstica\/HSE) para inspeccionar, sustituir \u00fatiles, reengrasar y recalibrar, manteniendo la producci\u00f3n media del cronograma. Se\u00f1ales objetivas para decidir una parada Tendencias de m\u00e1quina: [&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-4744","post","type-post","status-publish","format-standard","hentry","category-preguntas-frecuentes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Paradas de mantenimiento del cabezal: cu\u00e1ndo y c\u00f3mo<\/title>\n<meta name=\"description\" content=\"Cu\u00e1ndo conviene parar el cabezal (par\/empuje, abrasividad, presi\u00f3n) y c\u00f3mo programarlo sin afectar plazos: ventanas, repuestos, HSE y reentrada controlada.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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