GEOTECHNICAL MONITORING IN CONSTRUCTION OF ESCALATOR TUNNELS

Construction of escalator tunnels in the Saint-Petersburg subway uses the ‘classical’ technology with artificial freezing of soil. With such method involved, the maximum subsidence of ground surface was observed in the period of soil thawing and reached 550 mm, and even 900– 1000 mm sometimes. In the recent 15 years, the escalator tunnels were constructed using two novel technologies characterized with small subsidence of ground surface: with enclosing structures and with mechanized tunneling using tunnel boring machinery. The ground surface subsidence was not more than 100 mm in the first (pilot) application of the technologies and made 20–25 mm during subsequent applications. During construction of escalator tunnels, geotechnical monitoring involves geotechnical survey of the lining–soil mass system. The geotechnical monitoring enables safe construction of escalator tunnels, with adjustment of process variables, or design of support and lining. The database created during the observations makes it possible to analyze the research finding in terms of the technologies and structural solutions in use, and to amend the next similar projects.


For citation: Lebedev M. O., Egorov G. D. Geotechnical monitoring in construction of escalator tunnels. MIAB. Mining Inf. Anal. Bull. 2019;(10):146-159. [In Russ]. DOI: 10.25018/0236-1493-2019-100-146-159.

Keywords

Escalator tunnel, new technologies, geotechnical monitoring, deformation, database.

Issue number: 10
Year: 2019
ISBN: 0236-1493
UDK: 624.191.22; 624.121.532
DOI: 10.25018/0236-1493-2019-10-0-146-159
Authors: Lebedev M. O., Egorov G. D.

About authors: M.O. Lebedev, Cand. Sci. (Eng.), Vice Director for Research, e-mail: lebedev-lmgt@yandex.ru, G.D. Egorov, Senior Researcher, e-mail: krisha1@yandex.ru, Open Joint Stock Company «Scientific, Research, Design and Surveying Institute «Lenmetrogiprotrans», 191002, Saint-Petersburg, Russia. Corresponding author: M.O. Lebedev, e-mail: lebedev-lmgt@yandex.ru.

REFERENCES:

1.     Bezrodnyy K. P., Lebedev M. O., Egorov G. D. Construction of escalator tunnels of the St. Petersburg metro. Metro i tonneli. 2015, no 1, pp. 14—17. [In Russ].

2.     Bezrodnyy K. P., Maslak V. A., Markov V. A., Lebedev M. O., Starkov A. Yu., Morozov A. V., Ukhanov A. V. Combined technology of soil stabilization in the construction of escalator tunnels of the St. Petersburg metro. Metro i tonneli. 2009, no 5, pp. 35—37. [In Russ].

3.     Sillerico Mayta E., Reader D., Suarez Diaz J., Vivier R., Marchand E., Ahmad S. Design and construction of escalator shafts and an inclined access passage at the new Elizabeth line Liverpool Street station (The Crossrail Project). ITA—AITES World Tunnel Congress 21—26 April 2018, paper proceedings.

4.     Sillerico Mayta E., Suarez Diaz J., Vivier R., Marchand E., Ahmad S. Design and Construction of Inclined Escalator Shafts and Stair Adit at Liverpool St and Whitechapel Stations, Crossrail Project, January 2018, pp. 195—222.

5.     Ryan McCarron. Victoria Station Upgrade. PAL 10. The challenges of mining an escalator barrel within an operational station, Harding Prize Submission Paper. 2015, pp. 1—12.

6.     Shtern G. Ya., Sorokin N. A. Construction of an escalator tunnel in Moscow by Lovat’s TBM. Metro i tonneli. 2009, no 2, pp. 6—7. [In Russ].

7.     Bezrodnyy K. P., Salan A. I., Maslak V. A., Markov V. A., Lebedev M. O. The practice of implementation of nonstop technologies in the construction of the St. Petersburg metro. Zapiski Gornogo instituta. 2012, vol. 199, pp. 190—195. [In Russ].

8.     Lebedev M. O., Egorov G. D. Stress-strain state of sloping tunnel linings constructed according to different technological schemes. Izvestiya Tul'skogo gosudarstvennogo universiteta. Tekhnicheskie nauki. 2015. Issue 8, part 2, pp. 18—26. [In Russ].

9.     Li Y., Hewett B. Borehole seismic quantitative diagnosis of a seismic velocity model for 3D seismic imaging of subsurface structures, EAGE. Geophysical Prospecting. 2014, Vol. 62, pp. 719—739.

10.    Julius K. von Ketelhodt, Thomas Fechner, Musa S. D. Manzi, Raymond J. Durrheim Joint inversion of cross-borehole P-waves, horizontally and vertically polarized S-waves: tomographic data for hydro-geophysical site characterization. Near Surface Geophysics. 2018. No 16, pp. 529—542.

11.    Brunton M., Preston J., Whelan B. E. Monitoring of Sprayed Concrete Lined Tunnels Using Fibre Bragg Grating Sensors, Monitor Optics Systems Pty. Ltd. 2015.

12.    Garber V. A., Kashko A. A., Panfilov D. V. Spatial modeling in the construction of transport tunnels. Metro i tonneli. 2004, no 5, pp. 46—48. [In Russ].

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