Use of the gyrotheodolite in underground networks of long high-speed railway tunnels

Velasco Gómez, Jesús and Prieto Morin, Juan Francisco and Herrero Tejedor, Tomas Ramón and Pérez Martín, Enrique and Molina, I. and Fábrega Golpe, José (2016). Use of the gyrotheodolite in underground networks of long high-speed railway tunnels. "Survey Review", v. 48 (n. 350); pp. 1-10. ISSN 0039-6265. https://doi.org/10.1179/1752270615Y.0000000043.

Description

Title: Use of the gyrotheodolite in underground networks of long high-speed railway tunnels
Author/s:
  • Velasco Gómez, Jesús
  • Prieto Morin, Juan Francisco
  • Herrero Tejedor, Tomas Ramón
  • Pérez Martín, Enrique
  • Molina, I.
  • Fábrega Golpe, José
Item Type: Article
Título de Revista/Publicación: Survey Review
Date: 2016
ISSN: 0039-6265
Volume: 48
Subjects:
Freetext Keywords: Gyrotheodolite, Tunnels, Geoid, Deviation of the vertical
Faculty: E.T.S.I. en Topografía, Geodesia y Cartografía (UPM)
Department: Ingeniería Cartográfica y Topografía
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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).

More information

Item ID: 41437
DC Identifier: http://oa.upm.es/41437/
OAI Identifier: oai:oa.upm.es:41437
DOI: 10.1179/1752270615Y.0000000043
Official URL: https://doi.org/10.1179/1752270615Y.0000000043
Deposited by: Memoria Investigacion
Deposited on: 22 Mar 2017 13:30
Last Modified: 14 Mar 2019 19:00
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