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Tunnel deformation measurements with high resolution laser scanning

Timothy Nuttens (UGent) , Alain De Wulf (UGent) , Lander Bral (UGent) , Bart De Wit (UGent) , Leen Carlier, Marijke De Ryck (UGent) and Hans De Backer (UGent)
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Abstract
Terrestrial high resolution laser scanning is a still growing technique for geodetic deformation measurements of civil technical constructions, i.c. newly built tunnels. By delivering millions of very accurate 3D points, laser scanning is an alternative for classical topographical measurements with a total station or digital photogrammetry for measurements in difficult field conditions. In the following paper, the error values during processing of a measured tunnel section and the final determination of the deformations of this tunnel section based on 3D laser scan point clouds will be further detailed. The results that are presented in this paper are results of measurements obtained with a terrestrial high resolution Time-of-Flight laser scanner Leica ScanStation 2. The subject of this research is the still ongoing construction of two railway tunnels in Zaventem (Belgium) as a northern access road for the national airport (Brussel Airport) (Diabolo-project, NV Infrabel). The twelve specified tunnel sections that have to be closely monitored, have to be scanned immediately after placement of the tunnel section, once a week during the first month after placement and once a month from then on until stabilization of the construction. The concrete surface of the walls is scanned with an average lateral resolu-tion of 5 mm. During the research until now, a workflow to determine the deformations of the tunnel sections is developed for processing the data with one laser scan software package (Trimble Realworks), followed by further analysis with a CAD software. The differences that are determined between the different points in time show a stabilization of the construction after the second control measurement. The comparison of the second control measurement with the previous control measurement shows a systematic and random error of less than 1 mm. Further improvement and extension of the workflow is planned in the near future, together with research on the correlation between the measured tunnel deformations and simultaneous measured tension measurements.
Keywords
Tunnel, Deformation Measurements, Laser Scanning

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Chicago
Nuttens, Timothy, Alain De Wulf, Lander Bral, Bart De Wit, Leen Carlier, Marijke De Ryck, and Hans De Backer. 2009. “Tunnel Deformation Measurements with High Resolution Laser Scanning.” In Proceedings of the 4th International Workshop on 3D Geo-Information., ed. Philippe De Maeyer, Tijs Neutens, and Marijke De Ryck, 167–181. Zelzate, Belgium: DCL Print&Sign.
APA
Nuttens, T., De Wulf, A., Bral, L., De Wit, B., Carlier, L., De Ryck, M., & De Backer, H. (2009). Tunnel deformation measurements with high resolution laser scanning. In Philippe De Maeyer, T. Neutens, & M. De Ryck (Eds.), Proceedings of the 4th International Workshop on 3D Geo-Information. (pp. 167–181). Presented at the 4th International Workshop on 3D Geo-Information (3DGeoInfo - 2009), Zelzate, Belgium: DCL Print&Sign.
Vancouver
1.
Nuttens T, De Wulf A, Bral L, De Wit B, Carlier L, De Ryck M, et al. Tunnel deformation measurements with high resolution laser scanning. In: De Maeyer P, Neutens T, De Ryck M, editors. Proceedings of the 4th International Workshop on 3D Geo-Information. Zelzate, Belgium: DCL Print&Sign; 2009. p. 167–81.
MLA
Nuttens, Timothy, Alain De Wulf, Lander Bral, et al. “Tunnel Deformation Measurements with High Resolution Laser Scanning.” Proceedings of the 4th International Workshop on 3D Geo-Information. Ed. Philippe De Maeyer, Tijs Neutens, & Marijke De Ryck. Zelzate, Belgium: DCL Print&Sign, 2009. 167–181. Print.
@inproceedings{778608,
  abstract     = {Terrestrial high resolution laser scanning is a still growing technique for geodetic deformation measurements of civil technical constructions, i.c. newly built tunnels. By delivering millions of very accurate 3D points, laser scanning is an alternative for classical topographical measurements with a total station or digital photogrammetry for measurements in difficult field conditions. In the following    paper, the error values during processing of a measured tunnel section and the final determination of the deformations of this tunnel section based on 3D laser scan point clouds will be further detailed. The results that are presented in this paper are results of measurements obtained with a terrestrial high  resolution Time-of-Flight laser scanner Leica ScanStation 2. The subject of this research is the still ongoing construction of two railway tunnels in Zaventem (Belgium) as a northern access road for the national airport (Brussel Airport) (Diabolo-project, NV Infrabel). The twelve specified tunnel sections that have to be closely monitored, have to be scanned immediately after placement of the tunnel section, once a week during the first month after placement and once a month from then on until stabilization of the construction. The concrete surface of the walls is scanned with an average lateral resolu-tion of 5 mm. During the research until now, a workflow to determine the deformations of the tunnel sections is developed for processing the data with one laser scan software package (Trimble Realworks), followed by further analysis with a CAD software. The differences that are determined between the different points in time show a stabilization of the construction after the second control measurement. The comparison of the second control measurement with the previous control measurement shows a systematic and random error of less than 1 mm. Further improvement and extension of the workflow is planned in the near future, together with research on the correlation between the measured tunnel deformations and simultaneous measured tension measurements.},
  author       = {Nuttens, Timothy and De Wulf, Alain and Bral, Lander and De Wit, Bart and Carlier, Leen and De Ryck, Marijke and De Backer, Hans},
  booktitle    = {Proceedings of the 4th International Workshop on 3D Geo-Information.},
  editor       = {De Maeyer, Philippe and Neutens, Tijs and De Ryck, Marijke},
  isbn         = {9789090248202},
  keyword      = {Tunnel,Deformation Measurements,Laser Scanning},
  language     = {eng},
  location     = {Ghent, Belgium},
  pages        = {167--181},
  publisher    = {DCL Print\&Sign},
  title        = {Tunnel deformation measurements with high resolution laser scanning},
  year         = {2009},
}