{"id":5109,"date":"2026-01-27T08:58:02","date_gmt":"2026-01-27T08:58:02","guid":{"rendered":"https:\/\/eurohinca.com\/?p=5109"},"modified":"2026-01-27T09:01:27","modified_gmt":"2026-01-27T09:01:27","slug":"how-to-manage-the-risk-of-surface-seating-in-sensitive-urban-environments","status":"publish","type":"post","link":"https:\/\/eurohinca.com\/en\/como-se-gestiona-el-riesgo-de-asientos-en-superficie-en-entornos-urbanos-sensibles\/","title":{"rendered":"How is the risk of surface seating managed in sensitive urban environments?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"5109\" class=\"elementor elementor-5109\" 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=\"90\" data-end=\"543\">In urban environments (buildings, services, traffic and existing networks), the risk of seating is managed by a combination of <strong data-start=\"219\" data-end=\"240\">geotechnical design<\/strong>, <strong data-start=\"242\" data-end=\"273\">method\/equipment selection<\/strong>, <strong data-start=\"275\" data-end=\"315\">real-time parameter control<\/strong> y <strong data-start=\"318\" data-end=\"357\">auscultation with alarm thresholds<\/strong>. In projects of <strong data-start=\"375\" data-end=\"456\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/pipe-jacking-2\/\" target=\"_new\" rel=\"noopener\" data-start=\"377\" data-end=\"454\">pipe jacking (microtunneling)<\/a><\/strong>, The objective is to avoid volume losses in the field and maintain a stable front.<\/p><p data-start=\"545\" data-end=\"617\"><strong data-start=\"545\" data-end=\"615\">1) Reducing uncertainty before work (design and planning)<\/strong><\/p><ul data-start=\"618\" data-end=\"1732\"><li data-start=\"618\" data-end=\"954\"><p data-start=\"620\" data-end=\"954\">Geotechnical and hydrogeological campaign aimed at identifying sensitive soils, abrupt changes and the presence of water; it results in a risk model and preventive measures (see <strong data-start=\"797\" data-end=\"950\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/what-geotechnical-risks-are-most-common-in-microtunneling-and-how-to-mitigate-them-on-site\/\" target=\"_new\" rel=\"noopener\" data-start=\"799\" data-end=\"948\">geotechnical risks and mitigation<\/a><\/strong>).<\/p><\/li><li data-start=\"955\" data-end=\"1344\"><p data-start=\"957\" data-end=\"1344\">Selection of the excavation system that best controls the stability of the face in urban areas: typically <strong data-start=\"1061\" data-end=\"1153\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/closed-shield-tunnel-boring-machines\/\" target=\"_new\" rel=\"noopener\" data-start=\"1063\" data-end=\"1151\">closed shield tunnel boring machines<\/a><\/strong> (EPB or hydroshield) when there is a water table, granular soils or high sensitivity to settling; see also <strong data-start=\"1263\" data-end=\"1341\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/choice-of-tunnel-boring-machine\/\" target=\"_new\" rel=\"noopener\" data-start=\"1265\" data-end=\"1339\">choice of tunnel boring machine<\/a><\/strong>.<\/p><\/li><li data-start=\"1345\" data-end=\"1732\"><p data-start=\"1347\" data-end=\"1732\">Design of wells and civil works to avoid movements induced by auxiliary excavations: <strong data-start=\"1439\" data-end=\"1565\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/how-to-dimension-attack-and-reception-wells\/\" target=\"_new\" rel=\"noopener\" data-start=\"1441\" data-end=\"1563\">how to dimension attack and reception wells<\/a><\/strong> y <strong data-start=\"1568\" data-end=\"1731\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/what-are-the-civil-works-and-manholes-requirements-for-a-pipeline-jacking-project\/\" target=\"_new\" rel=\"noopener\" data-start=\"1570\" data-end=\"1729\">civil works and well requirements<\/a><\/strong>.<\/p><\/li><\/ul><p data-start=\"1734\" data-end=\"1843\"><strong data-start=\"1734\" data-end=\"1841\">2) Control of the face and volume balance during excavation (which has the greatest impact on seating).<\/strong><\/p><ul data-start=\"1844\" data-end=\"2890\"><li data-start=\"1844\" data-end=\"2368\"><p data-start=\"1846\" data-end=\"1929\">Maintain a <strong data-start=\"1859\" data-end=\"1889\">adequate chamber pressure<\/strong> to balance the soil and water:<\/p><ul data-start=\"1932\" data-end=\"2368\"><li data-start=\"1932\" data-end=\"2042\"><p data-start=\"1934\" data-end=\"2042\">In fines\/cohesives it is usually applied to <strong data-start=\"1969\" data-end=\"2039\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/closed-shield-epb\/\" target=\"_new\" rel=\"noopener\" data-start=\"1971\" data-end=\"2037\">EPB closed shield<\/a><\/strong>.<\/p><\/li><li data-start=\"2045\" data-end=\"2368\"><p data-start=\"2047\" data-end=\"2368\">In saturated granulars or at high pressures, it is usually preferable to <strong data-start=\"2114\" data-end=\"2200\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/closed-shield-hydroshield\/\" target=\"_new\" rel=\"noopener\" data-start=\"2116\" data-end=\"2198\">closed shield hydroshield<\/a><\/strong> and a strategy of <strong data-start=\"2221\" data-end=\"2365\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/pressure-management-under-high-groundwater-with-hydroshields\/\" target=\"_new\" rel=\"noopener\" data-start=\"2223\" data-end=\"2363\">pressure management under high groundwater<\/a><\/strong>.<\/p><\/li><\/ul><\/li><li data-start=\"2369\" data-end=\"2551\"><p data-start=\"2371\" data-end=\"2551\">Coordinated adjustment of <strong data-start=\"2392\" data-end=\"2435\">advance, torque, thrust, pull-out\/return<\/strong> (especially in slurry) to avoid over-excavation, loss of fines or \u201cvoids\u201d that result in settling.<\/p><\/li><li data-start=\"2552\" data-end=\"2890\"><p data-start=\"2554\" data-end=\"2890\">Lubrication and friction control to avoid blockages and forced stops (poorly managed stops increase the risk of pressure losses and deformations), within the approach of <strong data-start=\"2736\" data-end=\"2889\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/what-geotechnical-risks-are-most-common-in-microtunneling-and-how-to-mitigate-them-on-site\/\" target=\"_new\" rel=\"noopener\" data-start=\"2738\" data-end=\"2887\">geotechnical risks and mitigation<\/a><\/strong>.<\/p><\/li><\/ul><p data-start=\"2892\" data-end=\"2962\"><strong data-start=\"2892\" data-end=\"2960\">3) Auscultation and \u201cobservational method\u201d (measure-compare-act).<\/strong><\/p><ul data-start=\"2963\" data-end=\"3709\"><li data-start=\"2963\" data-end=\"3062\"><p data-start=\"2965\" data-end=\"3062\">A monitoring plan is defined with <strong data-start=\"3003\" data-end=\"3015\">thresholds<\/strong> (alert\/alarm\/stop) and associated actions.<\/p><\/li><li data-start=\"3063\" data-end=\"3310\"><p data-start=\"3065\" data-end=\"3310\">Real-time monitoring of digging and quality parameters, see <strong data-start=\"3138\" data-end=\"3307\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/production-quality-and-safety-metrics-are-monitored-in-a-microtunnel-project\/\" target=\"_new\" rel=\"noopener\" data-start=\"3140\" data-end=\"3305\">metrics to be monitored in a microtunnel<\/a><\/strong>.<\/p><\/li><li data-start=\"3311\" data-end=\"3709\"><p data-start=\"3313\" data-end=\"3709\">Typical external survey (according to criticality): topographic control of surface and buildings, control of sensitive services, piezometry if applicable. At intersections with administrative requirements (roads\/railways), the approach is integrated in the <strong data-start=\"3563\" data-end=\"3708\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/how-are-subway-infrastructure-crossings-managed\/\" target=\"_new\" rel=\"noopener\" data-start=\"3565\" data-end=\"3706\">management of subway infrastructure crossings<\/a><\/strong>.<\/p><\/li><\/ul><p data-start=\"3711\" data-end=\"4173\"><strong data-start=\"3711\" data-end=\"3776\">4) Geometric accuracy for minimizing aggressive corrections<\/strong><br data-start=\"3776\" data-end=\"3779\" \/>Maintaining tolerances and avoiding abrupt corrections helps to reduce lateral loads and ground disturbance: <strong data-start=\"3891\" data-end=\"4054\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/how-to-control-the-alignment-curvature-and-elevation-of-a-remote-controlled-pipe-jacking-system\/\" target=\"_new\" rel=\"noopener\" data-start=\"3893\" data-end=\"4052\">alignment, curvature and dimension control<\/a><\/strong> y <strong data-start=\"4057\" data-end=\"4172\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/how-the-alignment-is-controlled-in-real-time\/\" target=\"_new\" rel=\"noopener\" data-start=\"4059\" data-end=\"4170\">real-time alignment control<\/a><\/strong>.<\/p><p data-start=\"4175\" data-end=\"4611\"><strong data-start=\"4175\" data-end=\"4237\">5) Contingency plan (what to do if entries appear)<\/strong><br data-start=\"4237\" data-end=\"4240\" \/>In sensitive urban areas, in addition to prevention, a \u201cplan B\u201d is defined: immediate adjustment of parameters (pressure\/advance\/extraction), reinforcement of auscultation, and corrective measures compatible with the method (e.g., compensation\/injection actions according to design), coordinated by <strong data-start=\"4514\" data-end=\"4610\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/technical-assistance-and-engineering\/\" target=\"_new\" rel=\"noopener\" data-start=\"4516\" data-end=\"4608\">Technical assistance and engineering<\/a><\/strong>.<\/p><p data-start=\"4613\" data-end=\"5018\">In typical urban networks (sewers, water supply, crossings), these practices are systematically applied in the following areas <strong data-start=\"4727\" data-end=\"4827\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/urban-sewage-systems\/\" target=\"_new\" rel=\"noopener\" data-start=\"4729\" data-end=\"4825\">urban sewage systems<\/a><\/strong>, <strong data-start=\"4829\" data-end=\"4928\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/urban-supply-system\/\" target=\"_new\" rel=\"noopener\" data-start=\"4831\" data-end=\"4926\">urban supply systems<\/a><\/strong> y <strong data-start=\"4931\" data-end=\"5017\"><a class=\"decorated-link\" href=\"https:\/\/eurohinca.com\/en\/infrastructure-crossings\/\" target=\"_new\" rel=\"noopener\" data-start=\"4933\" data-end=\"5015\">infrastructure crossings<\/a><\/strong>.<\/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 entornos urbanos (edificios, servicios, tr\u00e1fico y redes existentes), el riesgo de asientos se gestiona con una combinaci\u00f3n de dise\u00f1o geot\u00e9cnico, selecci\u00f3n del m\u00e9todo\/equipo, control de par\u00e1metros en tiempo real y auscultaci\u00f3n con umbrales de alarma. En proyectos de hinca de tuber\u00eda (microt\u00fanel), el objetivo es evitar p\u00e9rdidas de volumen en el terreno y mantener [&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-5109","post","type-post","status-publish","format-standard","hentry","category-preguntas-frecuentes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gesti\u00f3n de asientos urbanos en microt\u00fanel | Eurohinca<\/title>\n<meta name=\"description\" content=\"C\u00f3mo minimizar asientos en microt\u00fanel urbano: presi\u00f3n de frente, balance de vol\u00famenes, lubricaci\u00f3n e instrumentaci\u00f3n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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