SAFETY PROVISION IN THE CONSTRUCTION OF A TWO-TRACK SUBWAY TUNNEL IN QUATERNARY DEPOSITS

For the first time in the practice of construction of subways in the territory of the Russian Federation, a double-track running tunnel was built. Tunnelling excavation was carried out within the quaternary deposits — water-saturated completely unstable soils, as well as in dense Proterozoic clays. Tunnelling excavation was carried out using a tunnel-boring mechanized complex (TBMC) with earth pressure balance. The tunnel route crossed the traffic junctions, the railway; in the zone of influence of the construction there were buildings and structures. To ensure the safety of construction, geotechnical monitoring was carried out, one of the tasks of which was to adjust the technological parameters of the shield. For the possibility of prompt decision-making in the event that the controlled-parameters of the stress-strain state of the «tunnel-soil massif» system approach the criterion values, the measurements were performed by automated systems with real-time monitoring. This allows not only qualitatively to carry out emergency response in case of need, but also to make an operative correction of the technological mode of penetration, aimed at reducing deformations of the surrounding soil massif.

For citation: Lebedev M. O. Safety provision in the construction of a two-track subway tunnel in quaternary deposits. Gornyy informatsionno-analiticheskiy byulleten'. 2019;3:88-96. [In Russ]. DOI: 10.25018/0236-1493-2019-03-0-88-96.

Keywords

Subway, double-track running tunnel, quaternary deposits, mode of penetration, geotechnical monitoring.

Issue number: 3
Year: 2019
ISBN: 0236-1493
UDK: 69.035.4
DOI: 10.25018/0236-1493-2019-03-0-88-96
Authors: Lebedev M. O.

About authors: M.O. Lebedev, Candidate of Technical Sciences, Assistant Professor, Deputy General Director for Research, e-mail: lebedev-lmgt@yandex.ru, SJC NIPII Lenmetrogiprotrans, Saint-Petersburg, Russia.

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