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BEDDINGS AND FOUNDATIONS, SUBTERRANEAN STRUCTURES. SOIL MECHANICS

Investigation of foundation pit excavation influence on adjacent buildings

Vestnik MGSU 6/2014
  • Zertsalov Mikhail Grigor'evich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Soil Mechanics and Geotechnics, 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 .
  • Kazachenko Sergey Andreevich - Moscow State University of Civil Engineering (MGSU) Assistant Lecturer, Department of Soil Mechanics and Geotechnics, 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 .
  • Konyukhov Dmitriy Sergeevich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Soil Mechanics and Geotechnics, 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 77-86

Modern urban policies, particularly in major towns, involve the active use of underground space that poses the problem of assessing the impact of excavation on the existing buildings as one of the most urgent. Surface and semi-closed construction methods are currently widespread in the process of urban civil and transport underground facilities construction. The depth of excavation can reach 30 m, but more often, in everyday practice common foundation pits have shallower depth, accommodating 2—4 underground levels (6—12 m).
In the process of solving such problems not only the forces occurring in the foundation pit fence are of great interest, but also a quantitative change in the stress-strain state of the rock mass. In modern engineering practice in order to solve them numerical methods based on the finite element method are widely applied, which can quantify soil stress-strain state.
In this study, the authors present the investigation of the influence of various factors within their variation on the additional deformations of adjacent buildings located in the influence zone, using the design of experiment method. The study is based on 3-dimensional numerical simulation with the use of finite element method. Such calculated factors were taken: the depth of excavation (X1), modulus of deformation (X2), the distance to the building (X3) and distributed load of the building (X4).
As a result, regression equations to determine the maximum additional deformation of building and horizontal displacement of the pit fence were derived from the calculations carried out. Also, the graphs describing these dependencies and illustrating the effect of each factor were presented

DOI: 10.22227/1997-0935.2014.6.77-86

References
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  2. Rechitskiy V.V. Prognozirovanie velichin osadok zdaniy pri stroitel'stve podzemnykh sooruzheniy [Forecasting of the Additional Deformations of Buildings under Construction of Underground Structures]. Izvestiya Tul'skogo gosudarstvennogo universiteta [News of Tula State University]. 2003, pp. 21—24.
  3. Znamenskiy V.V., Chunyuk D.Yu., Morozov E.B. Ustroystvo ograzhdayushchikh sistem kotlovanov v stesnennykh gorodskikh usloviyakh [Arrangement of Protecting Systems of Foundation Pits under Constrained City Conditions]. Zhilishhnoe stroitel'stvo [Housing Construction]. 2012, no. 9, pp. 60—63.
  4. Garagash B.A. Nadezhnost' prostranstvennykh reguliruemykh sistem «sooruzhenieosnovanie» pri neravnomernykh deformaciyakh osnovaniya [Reliability of Spatial Adjustable Systems "Structure-Foundation" with Nonuniform Deformation of the Base]. Sochi, Kuban’kino Publ., 2004.
  5. Zertsalov M.G., Konyukhov D.S. Primenenie vysokikh tekhnologiy pri osvoenii podzemnogo prostranstva gorodov [High Technologies in the Use of Cities Undeground Space]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 4, pp. 37—43.
  6. Konyukhov D.S., Leushin V.Ju., Shishkin V.Ja., Karabaev M.I., Shmykov V.E. Analiz deformatsiy v okruzhayushchey zastroyke pri sooruzhenii glubokikh kotlovanov v Moskve [Analysis of the Adjacent Buildings Deformations, while Constructing Deep Excavations]. BST «Dostupnoe i komfortnoe zhil'e» [Bulletin of Construction Technologies. Affordable and Comfortable Housing]. 2011, no. 3, pp. 57—63.
  7. Razvodovskiy D.E., Shulyat'ev O.A, Nikiforova N.S. Otsenka vliyaniya novogo stroitel'stva i meropriyatiya po zashchite sushchestvuyushchikh zdaniy i sooruzheniy [Impact Assessment of New Construction and Measures for the Protection of Existing Buildings and Constructions]. Available at: http://www.eccpf.com. Date of access: 4.04.2014.
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  9. Konyukhov D.S., Lamonina E.V. Stroitel'stvo podzemnykh sooruzheniy otkrytym sposobom v usloviyakh neblagopriyatnykh geologicheskikh protsessov v g. Moskve [Construction of Underground Structures with the Surface Method in Unfavorable Geological Processes in Moscow]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2009, special issue no. 1, pp. 500—502.
  10. Zertsalov M.G., Ustinov D.V., Korolev M.V., Skrylev G.E., Guterman M.S. Modelirovanie rekonstruktsii i novogo stroitel'stva sooruzheniy isto-richeskoy zastroyki [Numerical Simulation of Reconstruction and Construction of Historical Structures]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 4, pp. 85—87.
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THREE-DIMENSIONAL GEOFILTRATIONAL MODEL OF THE ROGUN HYDRO POWER PLANT CONSTRUCTION SITE

Vestnik MGSU 5/2017 Volume 12
  • Khokhotva Sergey Nikolaevich - Branch of JSC «Planning and Surveying Scientific Research Institute "Gidroproekt" named after S.Ya. Zhuk» - "Center for Geodynamic Observations in the Energy Industry" (Branch of JSC"Gidroproekt Institute -"CSGNEO") head of the Seismic Capacity Department, Branch of JSC «Planning and Surveying Scientific Research Institute "Gidroproekt" named after S.Ya. Zhuk» - "Center for Geodynamic Observations in the Energy Industry" (Branch of JSC"Gidroproekt Institute -"CSGNEO"), 2 Volokolamskoe shosse, Moscow, 125993, Russain Federation.
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Chief Scientific Officer, Scientific and Technical Center “EXPO”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Bykovsky Dmitry Vladimirovich - the Moscow Branch of ENEX (OJSC) Сandidate of Technical Sciences, project chief engineer, the Moscow Branch of ENEX (OJSC), 7A, bdg 9, Stroitel’ny pr., Moscow, 125362, Russian Federation.

Pages 512-518

The article deals with technique of creation and results of calculations of the three-dimensional geofiltrational model of the Rogun HPP construction site. When performing works on creation of the Rogun HPP three-dimensional geofiltration model, geological and hydrogeological conditions of the Rogun HPP construction site were analyzed. They showed that the construction site consists mostly of fractured rocks of various weathering degrees. In terms of preservation, four preservation zones were identified in the rock mass. These zones define the features of hydrogeological conditions that have emerged in the area of construction. Calculation results illustrated the absence of seepage areas on the lower slope of dam; this is the indication of normal operation of the dam impervious circuit. The drainage system of the underground hydropower plant has a high efficiency. Operation of the drainage galleries complex leads to a significant reduction of piezometric pressure on roofs of the machine and transformer halls. Above the underground structures a completely drained area is formed. Completed forecast calculations on geofiltration model of the Rogun hydropower plant determine the hydrostatic pressure and piezometric pressure at any point of the modeled area. These data can be used as loads while designing of lining of underground workings.

DOI: 10.22227/1997-0935.2017.5.512-518

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