Análisis del método de Baass y Vouland para obtención de trazados en elevación.
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Date
2025
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Publisher
Universidad de Concepción
Abstract
La geometría de la vía es necesaria para realizar modificaciones de esta o para analizar su seguridad vial. Esta se representa con los parámetros geométricos que se encuentran en los planos de construcción, y cuando no se poseen estos, se debe realizar un levantamiento de datos topográficos para obtener los parámetros de la vía. Una opción obtener estos datos es con un GPS cinemático en tiempo real (Real Time Kinematics). Este trabajo tiene como objetivo, analizar el método de Baass y Vouland para obtener los parámetros geométricos del trazado en elevación utilizando datos de GPS RTK.
Para cumplir con el objetivo propuesto, se realizó una revisión del estado del arte sobre alineamiento vertical y métodos de obtención de sus parámetros geométricos. Se creó un código que realiza el método de Baass y Vouland; y se analizó como influyen las variables en el resultado final del método utilizando curvas de prueba. Finalmente se utilizaron medidas de la Ruta Ch-158 entre Rafael y peaje Agua Amarillas para obtener los parámetros geométricos verticales con el método de Baass y Vouland.
Se identificó que el método de Baass y Vouland requiere que los datos utilizados posean una variabilidad mínima. Ya que una variabilidad del orden de metros puede dificultar la identificación de los elementos del trazado en elevación. Se observaron errores menores a 0,01 (m/m) en la estimación de pendientes uniformes, y estos provocaron errores en el cálculo del punto de intersección de las pendientes uniformes, siendo menores a 100 m de distancia recorrida y para distancias de pendientes uniformes mayores a 1 km, este error es mayor a 100 m de distancia recorrida. Todos estos datos son necesarios para el cálculo de longitud de curva vertical que pueden presentan errores en los mejores casos menores a 200 m, pero en otros casos pueden ser errores del orden de 1 km.
Se concluye que se debe reducir la variabilidad en los datos, o complementar la medición de estos. Se puede intentar obtener la ecuación de la pendiente uniforme aparte de los datos del GPS RTK para reducir los errores en el cálculo de longitud de curva.
The geometry of the road is necessary to make modifications to it or to analyze its road safety. This is represented with the geometric parameters found in the construction plans, and when these are not available, a survey of topographic data must be carried out to obtain the parameters of the road. One option to obtain this data is with a real-time kinematic GPS (Real Time Kinematics). This work aims to analyze the Baass and Vouland method to obtain the geometric parameters of the elevation layout using GPS RTK data. To meet the proposed objective, a review of the state of the art on vertical alignment and methods for obtaining its geometric parameters was carried out. A code was created that performs the Baass and Vouland method; and how the variables influence the final result of the method was analyzed using test curves. Finally, measurements of Route Ch-158 between Rafael and Agua Amarillas toll were used to obtain the vertical geometric parameters with the Baass and Vouland method. It was identified that the Baas and Vouland method requires that the data used have minimal variability. Since a variability of the order of meters can make it difficult to identify the elements of the layout in elevation. Errors less than 0.01 (m/m) were observed in the estimation of uniform slopes, and these caused errors in the calculation of the intersection point of uniform slopes, being less than 100 m of distance traveled and for distances of uniform slopes. greater than 1 km, this error is greater than 100 m of distance traveled. All these data are necessary for the calculation of the length of the vertical curve, which may present errors in the best cases of less than 200 m, but in other cases they may be errors of the order of 1 km. It is concluded that the variability in the data must be reduced, or the measurement of these should be complemented. You can try to obtain the uniform slope equation separately from the RTK GPS data to reduce errors in the curve length calculation.
The geometry of the road is necessary to make modifications to it or to analyze its road safety. This is represented with the geometric parameters found in the construction plans, and when these are not available, a survey of topographic data must be carried out to obtain the parameters of the road. One option to obtain this data is with a real-time kinematic GPS (Real Time Kinematics). This work aims to analyze the Baass and Vouland method to obtain the geometric parameters of the elevation layout using GPS RTK data. To meet the proposed objective, a review of the state of the art on vertical alignment and methods for obtaining its geometric parameters was carried out. A code was created that performs the Baass and Vouland method; and how the variables influence the final result of the method was analyzed using test curves. Finally, measurements of Route Ch-158 between Rafael and Agua Amarillas toll were used to obtain the vertical geometric parameters with the Baass and Vouland method. It was identified that the Baas and Vouland method requires that the data used have minimal variability. Since a variability of the order of meters can make it difficult to identify the elements of the layout in elevation. Errors less than 0.01 (m/m) were observed in the estimation of uniform slopes, and these caused errors in the calculation of the intersection point of uniform slopes, being less than 100 m of distance traveled and for distances of uniform slopes. greater than 1 km, this error is greater than 100 m of distance traveled. All these data are necessary for the calculation of the length of the vertical curve, which may present errors in the best cases of less than 200 m, but in other cases they may be errors of the order of 1 km. It is concluded that the variability in the data must be reduced, or the measurement of these should be complemented. You can try to obtain the uniform slope equation separately from the RTK GPS data to reduce errors in the curve length calculation.
Description
Tesis presentada para optar al título de Ingeniero Civil.
Keywords
Vías terrestres, Trazado de carreteras, Levantamiento topográfico