Comparing dam movements obtained with Terrestrial Laser Scanner (TLS) data against direct pendulums records

Authors

  • Luis Ramos-Alcázar Universidad Politécnica de Madrid
  • Miguel Marchamalo-Sacristán Universidad Politécnica de Madrid
  • Rubén Martínez-Marín Universidad Politécnica de Madrid http://orcid.org/0000-0002-2433-9354

DOI:

https://doi.org/10.17533/udea.redin.n76a12

Keywords:

TLS, dam seasonal movements, pendulums, precision, area- based analysis

Abstract


The results of the study carried out in a gravity-arch dam to measure its seasonal movements with TLS are presented. These values are compared with radial movements of the dam crest recorded by direct pendulums. The results show differences, only few millimeters, being the best result one millimeter discrepancy. The factors that have been considered are the precision and accuracy of the equipment, distance and angle of incidence of the laser beam, the density of the point cloud and the size of the triangles of the meshes. Considerations about density of point clouds and size of triangular meshes are made. In this study, a 7 cm distance between points and a 20 cm mesh size have given good results. Finally, a methodology is proposed to compare by reference to one of the meshes.

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Author Biographies

Luis Ramos-Alcázar, Universidad Politécnica de Madrid

Laboratorio de Topografía y Geomática, Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos

Miguel Marchamalo-Sacristán, Universidad Politécnica de Madrid

Laboratorio de Topografía y Geomática, Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos

Investigador titular, Departamento de Ingeniería y Morfología del terreno 

 

Rubén Martínez-Marín, Universidad Politécnica de Madrid

Laboratorio de Topografía y Geomática, Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos

Investigador catedrático, Departamento de Ingeniería y Morfología del terreno

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Published

2015-09-27

How to Cite

Ramos-Alcázar, L., Marchamalo-Sacristán, M., & Martínez-Marín, R. (2015). Comparing dam movements obtained with Terrestrial Laser Scanner (TLS) data against direct pendulums records. Revista Facultad De Ingeniería Universidad De Antioquia, (76), 99–106. https://doi.org/10.17533/udea.redin.n76a12