Field data analysis in construction of escalator tunnel at Spasskaya Station of the Saint-Petersburg Metro using tunnel boring machine

Authors: Kostenko B V

In April–June 2012 in the Saint-Petersburg Metro, an escalator tunnel was constructed at Spasskaya Station using a tunnel boring machine (TBM). That was the world’s fourth event of the escalator tunnel heading by TBM under additional load applied on the face from the overlying strata. The article discusses the escalator tunnel heading results. The field data were obtained in geotechnical monitoring accomplished by NIPII Lenmetrogiprotrans LLC. It was interesting how the new heading technologies influenced ground surface subsidence. The ground surface subsidence versus time and the subsidence trough by the end of the geotechnical monitoring were plotted. The individual heading factors of the highest effect on ground subsidence were analyzed: overlying strata pressure and quality of mortar grouting injection in the void behind the lining. The subsidence observation duration was taken into account. Based on the field data, the parameters of subsidence troughs were calculated, namely: distance to the subsidence trough bend—i; maximum subsidence in the lateral trough—Sv,max; coefficient of the site geology—k; subsidence trough width—L; subsidence trough volume—Vs; volume loss—VL. The calculated parameters were compared with the theoretical values.

Keywords: escalator tunnel, subsidence trough, grouting, overlying rock load, field data, geotechnical monitoring.
For citation:

Kostenko B. V. Field data analysis in construction of escalator tunnel at Spasskaya Station of the Saint-Petersburg Metro using tunnel boring machine. MIAB. Mining Inf. Anal. Bull. 2022;(4):100-115. [In Russ]. DOI: 10.25018/0236_1493_2022_4_0_100.

Acknowledgements:
Issue number: 4
Year: 2022
Page number: 100-115
ISBN: 0236-1493
UDK: 624.121.542
DOI: 10.25018/0236_1493_2022_4_0_100
Article receipt date: 02.07.2021
Date of review receipt: 26.01.2022
Date of the editorial board′s decision on the article′s publishing: 10.03.2022
About authors:

B.V. Kostenko, Engineer, Scientific, Research, Design and Surveying Institute «Lenmetrogiprotrans», 191002, Saint-Petersburg, Russia, e-mail: polo_olop@mail.ru.

 

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