Scientific Substantiation of Constructive-technological Parameters of St. Petersburg Subway Underground Structures

Frolov, Yuri; Konkov, Alexander; Larionov, A.A.

doi:10.1016/j.proeng.2017.05.107

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Numerical calculations were used to obtain the permissible displacement values of the lining, taking into account the presence of a screen made of low modulus material and depending on the tunnel deformable section length. Carrying out of work related to man-induced impacts, the project provided monitoring the tunnel and geo-massif structure [17].…”

Section: Figure 12 Design Of the Collector Tunnel Potentially Dangero...mentioning

confidence: 99%

Modeling and Monitoring of Structural Safety of Long-Operating Underground Structures of the Sewage System in the Conditions of Increasing Anthropogenic Actions in Order to Provide Sustainable Lifecycle of Engineering Infrastructure of the Megacity (The Experience of St. Petersburg)

Perminov¹,

Mangushev²

2022

IJCCSE

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Long-term operation in difficult engineering-geological conditions of unique underground sewage facilities creates the danger of violating their structural safety. A long-term study of the dynamics of changes in a technical state of large pumping stations and deep sewage tunnels made it possible to establish patterns of influence of intensive anthropogenic and dynamic actions on this process. The developed discrete and continuous diagnostic models of defect development in tunnel structures allow identifying potentially hazardous areas subjected to manifestation of critical failures and methods of their localization. On the basis of numerical modeling the boundaries of defect-free joint operation of the system “source of impact – geo-mass – sewage underground structure” have been determined. The geotechnical and structural calculations are used to simulate the interaction of the facilities with the soil environment and predict adaptive stress-strain control system parameters. With increasing external anthropogenic and dynamic impacts, modeling zones of urban areas with potentially dangerous sections of underground sewage facilities constitute the basis for development of regulatory documents on monitoring methods and safe development of the geotechnical infrastructure of a megacity.

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Section: Figure 12 Design Of the Collector Tunnel Potentially Dangero...mentioning

confidence: 99%

Modeling and Monitoring of Structural Safety of Long-Operating Underground Structures of the Sewage System in the Conditions of Increasing Anthropogenic Actions in Order to Provide Sustainable Lifecycle of Engineering Infrastructure of the Megacity (The Experience of St. Petersburg)

Perminov¹,

Mangushev²

2022

IJCCSE

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“…For many years the Department "Tunnels and subways" conducted scientific experiments on physical modeling by equivalent materials [4,5,6,7,8]. This method is based on the replacement of natural grounds and construction materials with artificial materials in the model so that indicators of physical and mechanical properties are in certain ratios with similar indicators of the same properties of nature.…”

Section: Tests Of Equivalent Materialsmentioning

confidence: 99%

Laboratory test of equivalent material as artificial ground

2020

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Appearing in the scientific literature in the second half of the twentieth century, the term “artificial ground” currently does not cover the entire range of geological formations associated with human activity. The authors of the article proposed a classification of artificial grounds, as well as put forward a number of considerations for strength tests of special group of artificial grounds – the equivalent materials for laboratory modeling.

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“…The building material supplier shall present its basic physical and mechanical characteristics, but not in bulk but in the compacted state in which the building material will operate as part of railway embankments. Provided physical and mechanical characteristics are not only necessary for analytical calculations of the stability of embankments or retaining walls but are particularly important for the design of artificial structures on railways, such as bridges and traffic tunnels [3][4][5][6][7]. A full-scale in-situ experiment is the most revealing and reliable way of doing this [8], but such studies require a rather high investment.…”

Section: Introductionmentioning

confidence: 99%

Laboratory measurements of dispersed soils as construction materials for railway embankments

2023

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Compacted construction sand - dispersed soil - is the main construction material for the construction of railway embankments. The supplier is obliged to present the main physico-mechanical properties of the building material not in free-flowing state, but in a compacted state, in which the material will work as part of railway embankments. A major problem in laboratory dispersed soil application tests is the inability to keep the specimen in its compacted state before placing it in a shear instrument or stabilisation meter. Hence, laboratory testing of dispersed soils can only be carried out in the bulk state and therefore the question of directly determining the physical and mechanical characteristics of building materials at their maximum density remains open. Methodology of direct testing of compacted samples in a single plane shear apparatus for determination of strength properties was developed and tested by the authors of the article, and also the methodology of determination of deformation properties by indirect way was suggested for preliminary evaluation of soil suitability as a building material for construction of railway embankments.

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Scientific Substantiation of Constructive-technological Parameters of St. Petersburg Subway Underground Structures

Cited by 4 publications

References 2 publications

Modeling and Monitoring of Structural Safety of Long-Operating Underground Structures of the Sewage System in the Conditions of Increasing Anthropogenic Actions in Order to Provide Sustainable Lifecycle of Engineering Infrastructure of the Megacity (The Experience of St. Petersburg)

Modeling and Monitoring of Structural Safety of Long-Operating Underground Structures of the Sewage System in the Conditions of Increasing Anthropogenic Actions in Order to Provide Sustainable Lifecycle of Engineering Infrastructure of the Megacity (The Experience of St. Petersburg)

Laboratory test of equivalent material as artificial ground

Laboratory measurements of dispersed soils as construction materials for railway embankments

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