SAFETY OF BUILDING SYSTEMS. ECOLOGICAL PROBLEMS OF CONSTRUCTION PROJECTS. GEOECOLOGY

GEOMECHANICAL MONITORING OF UNDERGROUND CONSTRUCTION PROJECTS

Vestnik MGSU 11/2012
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Chair, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Manko Artur Vladimirovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 227 - 235

The authors argue that optimization of monitoring systems is a complicated task, as multiple
factors need to be taken account of at one and the same time. The authors consider a monitoring
system as a system of "supervision" that incorporates a set of tools, as well as registration,
archiving, classification, and analysis of inspection results, inclusive of their comparison with the
projected data, development and implementation of engineering solutions.
The basic goal of any geomechanical monitoring project consists in development of a methodology
of rational arrangement of items of monitoring equipment that employ GIS technologies. The
objective of this research is to apply advanced numerical methods in combination with geographic
information systems with a view to the optimization of a system of monitoring applicable to subterranean
structures. Should the proven methodological and scientific validity of the research findings
be in place, long-term geomechanical projections of the structural behaviour will be feasible. The
proposed methodology may be introduced as a standard method of structural behaviour monitoring
in the course of construction and operation of structures for engineering solutions to be made in the
real-time mode. The principal goal of a monitoring system is the identification of the rock nature,
processes initiated in the medium, their development pattern, and the identification of technical and
economic factors of impact onto the engineering solutions to be made at each stage of engineering
surveys, design, construction and operation of major subterranean structures.
The analysis of calculations made for various loading scenarios have proven that any further
research should take account of a lateral load that is equal to doubled vertical loads.
The research was performed at a subterranean structure composed of two parallel chamber pits.
The analysis of GIS modeling methods has proven that development of GIS projects requires
the employment of statistical methods of the multidimensional analysis. Employment of multidimensional
analysis methods makes it possible to examine the geological features that demonstrate a
high degree of complexity. Terrain modeling requires the employment of models of formal characterization
and differentiation. Identification of positions of geological strata and tectonic dislocations
may be reduced to interpolation and extrapolation.
The model of a subterranean structure is implemented in the GIS and databases, and it incorporates
the data banks entitled "Rock", "Massif", "Structure and Massif", as well as the data banks.
that contain surveying, geological and supplementary information. The GIS also comprises a topographic
site plan, a geologic description of a massif (stratifi cation, lamination, as well as a complete
assessment of each major massif crack).
The subterranean structure of a radioactive waste storage site was the subject of a 3D numerical
experiment. Its results were entered into the GIS project database. Positions and lengths
of extensometers were optimized on the basis of the simulation performed in furtherance of the
methodology developed by the authors. Positions of extensometers were registered in the GIS as
reference points.

DOI: 10.22227/1997-0935.2012.11.227 - 235

References
  1. Man’ko A.V. Organizatsiya optimal’nogo monitoringa okruzhayushchey sredy dlya podzemnogo stroitel’stva [Organization of Optimal Monitoring of the Environment for the Purposes of Underground Construction]. Moscow, ASV Publ., 2009.
  2. Bereznyakov A.I. and other coauthors. Monitoring geotekhnicheskikh sistem: zadachi, osobennosti i metodologiya vypolneniya [Monitoring of Geotechnical Systems: Objectives, Peculiarities and Methodology of Performance]. Moscow, 1998.
  3. Berlyant A.M. Geoinformatsionnoe kartografirovanie [Geoinformational Mapping]. Moscow, Russian Academy of Natural Sciences, MGU Publ., 1997, 64 p.
  4. Geoinformatsionnye sistemy: obzornaya informatsiya. Seriya: geodeziya, aeros”emka, kartografiya [Overview of Geoinformation Systems. Geodesy, Aerial Mapping, Cartography Series]. Moscow, TsNIIGAiK Publ., 1992, 52 p.
  5. Konovalov N.V., Kapralov E.G. Vvedenie v GIS [Introduction into GIS]. Moscow, Biblion Publ., 1997, 160 p.
  6. Bernhardsen T. Georgaphic Information Systems: an Introduction. New York, John Wiley & Sons, 2002. 320 p.
  7. Trofimov V.T., editor. Gruntovedenie [Pedology]. Moscow, Nauka Publ., 2005, 1024 p.
  8. Pashkin E.M., Kagan A.A., Krivonogova N.F. Terminologicheskiy slovar’-spravochnik po inzhenernoy geologii [Dictionary and Reference Book of Engineering Geology]. Moscow, Knizhnyy dom publ., 2011, 950 p.
  9. Anan’ev V.P., Potapov A.D. Inzhenernaya geologiya [Engineering Geology]. Moscow, Vyssh. shk. publ., 2008, 260 p.

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LOGICAL-PROBABILISTIC METHOD IN ASSESSING THE RELIABILITY OF WATERPROOFING SYSTEMS OF UNDERGROUND PARTS OF BUILDINGS AND STRUCTURES

Vestnik MGSU 6/2018 Volume 13
  • Sokova Serafima Dmitrievna - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Associate Professor, Department of Housing and Communal Services, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Smirnova Nadezhda Vital’evna - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate, Department of Housing and Communal Services, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Smirnov Andrey Vyacheslavovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate, Department of Housing and Communal Services, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 748-755

Subject: the article considers one of the possible solutions to the problem of choosing the optimal waterproofing system for underground parts of buildings and structures using logical-probabilistic method. Selection of reliable hydro insulation of underground structures is a complex multi-task, and for successful functioning of the insulation it is necessary to focus on the systematic approach upon its creation. When choosing a waterproofing system, it is necessary to solve a multi-task and account for the specifics and status of a specific object, hydrogeological conditions, the depth of the structures, acting loads, the quality of construction works, etc. Apriori neglect of these factors and the lack of a systematic approach in the selection of hydro insulation system lead to accelerated wear and failure of structures. During operation as the main stage of life cycle of the building, the waterproofing of underground load-bearing frames of constructions is exposed to several rather difficult conditions. Hence, to avoid frequent overhaul, they should be chosen with the increased operational properties. The irregular choice of the protective coating leads to the accelerated wear and failure of the design. Objective assessment of the right choice of protective materials for an underground waterproofing and also selection of the most reliable and long-lived materials, especially for the bases, is a relevant task. The scientific novelty of this work consists in theoretical justification and the proof of a possibility of objective assessment of the choice of long-lived protection of designs of an underground part of buildings with the use of a logical-probabilistic method. Criteria of operational assessment of optimum long-lived materials are established and also the model of a tree of failures for different types of original materials of organic and mineral structure is proposed: bituminous, bituminous and polymeric, elastomeric, thermoplastic, clay, cement. Research objectives: choose an effective and durable hydro insulation system for underground structures of buildings under certain conditions of their operation using mathematical models and tools. Materials and methods: the “wall-foundation plate” system is considered which includes waterproofing membrane, waterproofing key, a repair mix, fillet, foundation mat, cast in-situ reinforced concrete, drainage geocomposite. We have applied logical-probabilistic method, the idea of which is the description of possible ways of functioning of the system by means of mathematical logic and the determination of its operability with the help of probability theory. Results: logical-probabilistic method allows us to analyze alternative options for creating waterproofing system by means of description of the possible ways of functioning of the variants being analyzed with the help of mathematical logic and determine the probability of their operability, based on which the optimal system that meets the requirements can be selected. A lot of factors were considered including the specificity and a status of a specific facility, hydrogeological conditions, depth of structures, acting loads, the quality of construction and installation works, etc. Conclusions: for achievement of the goal of the research, a set of factors including specificity and a condition of a specific facility, hydrogeological conditions, depth of structures, acting loads, quality of installation and construction works, etc. was considered. Taking into account the specified factors and systematic approach when choosing the waterproofing system proved its effectiveness by use of a logical-probabilistic method as the most accurate and reliable mathematical method.

DOI: 10.22227/1997-0935.2018.6.748-755

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