Anclajes en la mecánica de rocas con aplicación a túneles
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Cañas Vesga, Daniel Enrique
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Los anclajes se reconocen como uno de los sistemas de sostenimiento más eficientes en la construcción de túneles, y es común su aplicación en la actualidad. Este trabajo de investigación profundiza en el diseño de un sistema de anclajes para estabilizar cuñas críticas en obras subterráneas. Un código en MatLab fue desarrollado para identificar la cuñas cinemáticamente inestables, y se propone una metodología para estudiar la interacción entre cuñas y los sistemas de anclajes. Las variables incluidas son los sistemas de discontinuidades, resistencia a lo largo de los planos de discontinuidad, tipos de anclajes, y casos de carga para túneles de sección circular. Los resultados de la metodología propuesta presentan una mejor precisión y una menor incertidumbre respecto a programas de uso comercial, facilitando el desarrollo de un software de diseño y generando nuevas oportunidades de investigación.
Abstract. Anchoring systems are widely used around the world as one of the most important stabilization techniques during tunnel construction. This research focused on the design of anchoring systems for stabilization of critical wedges in underground environments. A MatLab code was developed to identify kinematically unstable wedges and a methodology was postulated to study the interaction between such wedges and the anchoring system. Study variables included jointing, strength along joint planes, several anchor technologies, and a number of loading scenarios for a tunnel circular section. The results showed higher precision and lower uncertainty when compared to available commercial software programs. The outcomes of this work will facilitate future software development for engineering design as well as new research opportunities.
Abstract. Anchoring systems are widely used around the world as one of the most important stabilization techniques during tunnel construction. This research focused on the design of anchoring systems for stabilization of critical wedges in underground environments. A MatLab code was developed to identify kinematically unstable wedges and a methodology was postulated to study the interaction between such wedges and the anchoring system. Study variables included jointing, strength along joint planes, several anchor technologies, and a number of loading scenarios for a tunnel circular section. The results showed higher precision and lower uncertainty when compared to available commercial software programs. The outcomes of this work will facilitate future software development for engineering design as well as new research opportunities.