Memorias de investigación
Research Publications in journals:
Use of the gyrotheodolite in underground networks of long high-speed railway tunnels
Year:2015
Research Areas
  • Earth sciences,
  • Engineering
Information
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).
International
Si
JCR
Si
Title
Survey Review
ISBN
0039-6265
Impact factor JCR
0,577
Impact info
Volume
10.1179/1752270615Y.0000000043
Journal number
From page
1
To page
10
Month
JULIO
Ranking
Participants
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Geovisualización, Espacios Singulares y Patrimonio
  • Departamento: Ingeniería Topográfica y Cartografía
  • Departamento: Ingeniería Agroforestal