Dovela resistant to the fire, for tunnels and similar, and procedure of manufacture of the same (Machine-translation by Google Translate, not legally binding)

• Main Authors: RIO SUAREZ OLGA, BOSCH CANTALLOPS BARTOLOME CARLO, FERNANDEZ LUCO LUIS
• Format: Patent
• Language: English; Spanish
• Published: 21.10.2009
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

Fire resistant canopy, for tunnels and similar and the manufacturing process thereof. The voussoir, for use in tunnels, wells and even false tunnels, is characterized by presenting a multi-layer structure obtained in a single phase in a mold, comprising a layer of porous concrete of artificial light aggregates (3) in the intrados, and a high-performance self-compactable concrete layer (2) towards the extrados. The porous concrete layer (3) is resistant to the action of fire for the time necessary to preserve the structural integrity of the voussoir, so that based on its low weight and low stiffness it does not induce significant additional mechanical stresses on the structure, while its low thermal conductivity retards the heating of the self-compacting concrete layer (2), preserving its structural function. (Machine-translation by Google Translate, not legally binding) Dovela resistente al fuego, para túneles y similares y procedimiento de fabricación de la misma. La dovela, para su utilización en túneles, pozos e incluso falsos túneles, se caracteriza por presentar una estructura multi-capa obtenida en una sola fase en un molde, comprendiendo un capa de hormigón poroso de áridos ligeros artificiales (3) en el intradós, y una capa de hormigón auto-compactable de altas prestaciones (2) hacia el extradós. La capa de hormigón poroso (3) es resistente a la acción de fuego durante el tiempo necesario para preservar la integridad estructural de la dovela, de manera que en base a su bajo peso y baja rigidez no induce solicitaciones mecánicas adicionales significativas sobre la estructura, mientras que su baja conductividad térmica retarda el calentamiento de la capa de hormigón auto compactable (2), preservando su función estructural.