{"id":649,"date":"2024-02-02T06:28:27","date_gmt":"2024-02-02T06:28:27","guid":{"rendered":"https:\/\/eurohinca.es\/?page_id=649"},"modified":"2026-03-12T10:43:24","modified_gmt":"2026-03-12T10:43:24","slug":"closed-shield-hydroshield","status":"publish","type":"page","link":"https:\/\/eurohinca.com\/en\/escudo-cerrado-hidroescudo\/","title":{"rendered":"Closed shield hydroshield"},"content":{"rendered":"
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Hydroshield Tunnel Boring Machine<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Eurohinca<\/strong> (Europea de Hincas Teledirigidas, S.A.), Trenchless specialist since 1996 - 14 TBMs and >120 km executed.<\/p>

The closed shield \/ hydro-shield<\/strong> It is ideal for use in water-saturated soils (sand\/silt): control of front-end pressure, watertightness, and precise alignment at intersections and service tunnels.
See pipe jacking (microtunneling)<\/a>, segment tunnel<\/a>,choice of tunnel boring machine<\/a>, technical assistance and engineering<\/a> y\u00a0references<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tRequest for information<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tCall us now<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\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
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"hydro\t\t\t\t\t\t\t\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Efficiency of hydroshield TBMs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The hydroshield tunnel boring machines<\/strong> These are advanced machines designed for excavation in areas with a high water table, granular soils, or unstable soils. Their system of circulation of bentonite slurry<\/strong> It maintains pressure at the excavation face, preventing water infiltration and ensuring the tunnel's stability.
This technology is particularly useful in projects involving submarine emissaries<\/strong><\/a>, crossings of marine protected areas<\/strong><\/a> y sea water catchments<\/strong><\/a>, where terrain conditions require maximum safety.<\/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\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Advantages of using a closed shield tunnel for excavations<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The hydro shield<\/strong> It offers numerous advantages over other excavation technologies. Its ability to control pressure in sandy, gravelly, or saturated soils makes it the ideal choice for construction projects at risk of leaks. In addition, it allows for precise excavation while minimizing surface impact.<\/p>

This method is used in projects involving complex civil engineering projects<\/strong><\/a>, urban supply systems<\/strong><\/a> y dam spillways<\/strong><\/a>.
In comparison, the EPB tunnel boring machine<\/strong><\/a> It is better suited for clay soils with low permeability, while the hydroshield is ideal for environments where water is present.<\/p>

This technology is regulated under the CEN Standard EN 12110:2014 on slurry pressure tunnel boring machines<\/strong><\/a>, a European leader in the safety and operation of water cannons.<\/p><\/blockquote>\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"hydro-shield\t\t\t\t\t\t\t\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Service Specifications for Closed-Shield Hydro-Shield (Slurry)<\/strong><\/h2>

The Slurry Shield is a tunnel boring machine designed to operate in granular, permeable, or highly saturated soils, maintaining a stable cutting face through a pressurized slurry system. Its application is defined by the following technical parameters:<\/p>

\u2022 Main applications:<\/strong> Microtunnels and mechanized tunnels under rivers, watercourses, port areas, alluvial lands, or urban environments with high water tables, where strict pressure control is required to prevent soil loss and surface movements.<\/p>

\u2022 Compatible land conditions:<\/strong> Sand, gravel, silt, non-cohesive soils, permeable soils, and formations with a high water content. The Slurry system allows the face to be stabilized even under conditions of high permeability.<\/p>

\u2022 Front Pressure and Support System:<\/strong> The excavation chamber is filled with bentonite slurry or polymers that are kept under pressure. This ensures stability against the surrounding soil and minimizes the risk of seepage, siphoning, or decompression.<\/p>

\u2022 Construction method:<\/strong> Excavation using a rotary head, mixing the excavated material with slurry, hydraulic transport of the debris through pipes to the separation plant, and installation of the lining (segments or driven pipe) depending on the project.<\/p>

\u2022 Sludge separation plant:<\/strong> An essential component of the slurry system. It allows for the recovery of slurry, the separation of sand and gravel, the adjustment of rheological properties, and the recirculation of the fluid back to the pressurized chamber.<\/p>

\u2022 Range of diameters and lengths:<\/strong> Suitable for microtunnels and tunnels of various diameters. Advancement lengths depend on pumping capacity, allowable pressure, ground conditions, and site logistics.<\/p>

\u2022 Civil works prerequisites:<\/strong> Launch pits or portals with space for the hydroshield, the slurry plant, pumping equipment, return pipes, ventilation, and maneuvering areas for segments or pipes.<\/p>

\u2022 Parameter Control and Guidance:<\/strong> Monitoring of chamber pressure, slurry density and viscosity, inlet and outlet flow rates, thrust, torque, and alignment. Guidance is provided by laser or gyroscope, depending on the route tolerances.<\/p>

\u2022 Quality control and safety:<\/strong> Continuous inspection of the working face stability, shield tightness, slurry separation efficiency, atmosphere monitoring, internal pressure, safe access to the borehole, and geometric verification of the installed lining.<\/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

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What they think of us<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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