MediciĆ³n experimental del comportamiento de las tensiones en el bulbo de un anclaje postensado
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Fecha
2024
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Profesor/a GuĆa
Idioma
es
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Universidad AndrƩs Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Durante el desarrollo de este trabajo, uno de los objetivos principales fue, lograr que, durante el
proceso de aplicaciĆ³n de ciclos de cargas sobre un anclaje de cables de acero, se pudiera cuantificar
la magnitud de las tensiones desarrolladas a lo largo del bulbo. Dado que el bulbo de un anclaje se
encuentra inaccesible de forma directa una vez que esta ejecutado dentro de la perforaciĆ³n, se
generĆ³ una instrumentaciĆ³n para lograr medir estas tensiones generadas en la interfaz lechada suelo, con este objetivo se realizĆ³ investigaciĆ³n bibliogrĆ”fica, entrevistas y reuniones con diferentes
expertos dedicados a la mediciĆ³n de parĆ”metros de materiales y en mĆ©todos de mediciones
empĆricas de los laboratorios de IngenierĆa de las universidades chilenas; Universidad de Chile y
Universidad CatĆ³lica, consiguiendo un diseƱo que permitiĆ³ subsanar el problema de accesibilidad
para medir las solicitaciones en el bulbo, cuando este estĆ” ejecutado y con la inyecciĆ³n global Ćŗnica
realizada, se desarrollĆ³ con el apoyo de Dictuc, un sistema mecĆ”nico-electrĆ³nico de mediciĆ³n
basado principalmente en strain gauge adheridas a una barra de cobre recocida instalada entre los
separadores de cable del bulbo, que permite obtener esta informaciĆ³n, la perforaciĆ³n ejecutada
para recibir el anclaje instrumentado se realizĆ³ con sistema tubex 115mm en la grava de Santiago de
Chile, y se procediĆ³ a la ejecuciĆ³n de un anclaje previamente instrumentado en su bulbo, se procediĆ³
a realizar una prueba de carga ā aptitud, la que permitiĆ³ generar un serie de tablas de datos que
muestran el comportamiento de las fuerzas ejercidas dentro del bulbo del anclaje ejecutado
During the development of this work, one of the main objectives was to achieve that, during the process of applying load cycles on a steel cable anchor, the magnitude of the tensions developed along the bulb could be quantified in time. real. Given that the bulb of an anchor is inaccessible directly once it is executed inside the drilling, instrumentation was generated to measure these tensions generated in the grout-soil interface, with this objective bibliographic research, interviews and meetings with different experts dedicated to the measurement of material parameters and empirical measurement methods from the engineering laboratories of Chilean universities; University of Chile and Catholic University, achieving a design that allowed us to solve the accessibility problem to measure the stresses on the bulb, when this is executed and with the single global injection carried out, a mechanical-electronic system was developed with the support of Dictuc. measurement based mainly on strain gauges attached to an annealed copper bar installed between the cable separators of the bulb, which allows obtaining this information, the drilling carried out to receive the instrumented anchor was carried out with a tubex 115 system in the gravel of Santiago de Chile , and proceeded to the execution of an anchor previously instrumented in its bulb, a load-fitness test was carried out, which allowed generating a series of data tables that show the behavior of the forces exerted within the bulb of the anchor executed.
During the development of this work, one of the main objectives was to achieve that, during the process of applying load cycles on a steel cable anchor, the magnitude of the tensions developed along the bulb could be quantified in time. real. Given that the bulb of an anchor is inaccessible directly once it is executed inside the drilling, instrumentation was generated to measure these tensions generated in the grout-soil interface, with this objective bibliographic research, interviews and meetings with different experts dedicated to the measurement of material parameters and empirical measurement methods from the engineering laboratories of Chilean universities; University of Chile and Catholic University, achieving a design that allowed us to solve the accessibility problem to measure the stresses on the bulb, when this is executed and with the single global injection carried out, a mechanical-electronic system was developed with the support of Dictuc. measurement based mainly on strain gauges attached to an annealed copper bar installed between the cable separators of the bulb, which allows obtaining this information, the drilling carried out to receive the instrumented anchor was carried out with a tubex 115 system in the gravel of Santiago de Chile , and proceeded to the execution of an anchor previously instrumented in its bulb, a load-fitness test was carried out, which allowed generating a series of data tables that show the behavior of the forces exerted within the bulb of the anchor executed.
Notas
Proyecto de tĆtulo (Ingeniero Civil)
Palabras clave
Anclaje (IngenierĆa de Estructuras), Tensores de Anclaje