Observatorio de I+D+i UPM

Descripción
The quality of geodetic networks for guiding Tunnel Boring Machines (TBMs) inside long tunnels depends largely on the correct use of a gyroscope. These networks are based on a series of control points at the tunnel entrance, and link each station by means of survey observations as they advance along the tunnel. Once, the networks are used to guide the TBM, they are no longer checked again. It is necessary to perform high accuracy astronomical observations to stars in order to determine the gyrotheodolite constant. Since astronomical observations cannot be made inside tunnels, geodetic azimuths have to be used for the computations. However, these azimuths cannot theoretically be compared with the astronomical azimuths obtained by the gyrotheodolite. An alternative is to compute the instrument constant using the values of the deviation of the vertical derived from a geoid model. That is the approach used in this work where a methodology for the design of underground networks in long tunnels is also presented. This procedure has been implemented during the construction of the Guadarrama and Pajares high-speed railway tunnels (Spain).
Internacional	Si
JCR del ISI	Si
Título de la revista	Survey Review
ISSN	0039-6265
Factor de impacto JCR	0,577
Información de impacto
Volumen
DOI	10.1179/1752270615Y.0000000043
Número de revista
Desde la página	1
Hasta la página	10
Mes	JULIO
Ranking

Esta actividad pertenece a memorias de investigación

• Autor: Jesus Velasco Gomez (UPM)
• Autor: Juan Francisco Prieto Morin (UPM)
• Autor: Tomas Ramon Herrero Tejedor (UPM)
• Autor: Enrique Perez Martin (UPM)

• Creador: Grupo de Investigación: Geovisualización, Espacios Singulares y Patrimonio
• Departamento: Ingeniería Topográfica y Cartografía
• Departamento: Ingeniería Agroforestal