BEDDINGS AND FOUNDATIONS, SUBTERRANEAN STRUCTURES

CREEP AND LONG-TERM BEARING CAPACITY OF LONG PILES SUBMERGED INTO THE CLAY SOIL MASSIF

Vestnik MGSU 1/2013
  • Ter-Martirosyan Zaven Grigor’evich - Moscow State University of Civil Engineering (MGSU) +7 (499) 261-59-88, 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 .
  • Sidorov Vitaliy Valentinovich - National Research Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Assistant Professor of the Department Soil Mechanics and Geotechnics, Researcher at the Research and Education Center «Geotechnics», National Research Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ter-Martirosyan Karen Zavenovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 109-115

Interaction between long piles and the adjacent soil has a spatial and temporal nature. This phenomenon is based on a set of non-linear and rheological properties of soils. Distribution of lateral forces between the surface and the pile toe is heavily dependent on the above properties. The process of formation of the stress-strain state around the pile can demonstrate decaying, constant or progressive velocity depending on the rheological processes in the soil that may be accompanied by hardening and softening processes at one and the same time. These processes may be caused by destruction and restoration of ties between clay soil particles, soil compaction and de-compaction. Predominance of the process of hardening leads to damping, while predominance of the process of softening causes progressive destruction. Description of this multi-component process depends on the rheological model of the soil. This research is based on the modified rheological model originally designed by Maxwell. The authors consider solutions to the problem of quantification of the stressstrain state of soil around the pile and their interaction. This research makes it possible to project motion patterns of long piles over the time and evaluate the limit of their long-term bearing capacity.

DOI: 10.22227/1997-0935.2013.1.109-115

References
  1. Vyalov S.S. Reologicheskie osnovy mekhaniki gruntov [Rheological Fundamentals of Soil Mechanics]. Moscow, Vyssh. shk. publ.,1978, 442 p.
  2. Meschyan S.R. Eksperimental’nye osnovy reologii glinistykh gruntov [Experimental Fundamentals of Rheology of Clay Soils]. Moscow, 2008, 805 p.
  3. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p.
  4. Ter-Martirosyan Z.G., Nguen Zang Nam. Vzaimodeystvie svay bol’shoy dliny s neodnorodnym massivom s uchetom nelineynykh i reologicheskikh svoystv gruntov [Interaction between Long Piles and a Heterogeneous Massif with Account for Non-linear and Rheological Properties of Soils]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2008, no. 2, pp. 3—14.

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COMPARISON OF MECHANICAL PROPERTIES OF THE CLAY STONE OF THE EARLY PERMIAN AGE ACCORDINGTO THE RESULTS OF FIELD AND LABORATORY TESTS

Vestnik MGSU 2/2013
  • Ponomarev Andrey Budimirovich - Perm National Research Polytechnical University (PGTU) +7 (342) 2-198-374, Perm National Research Polytechnical University (PGTU), 29 Komsomol’skiy prospekt, Perm, 614990, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Sychkina Evgeniya Nikolaevna - Perm National Research Polytechnical University (PGTU) +7 (342) 2-198-374, Perm National Research Polytechnical University (PGTU), 29 Komsomol’skiy prospekt, Perm, 614990, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 55-63

The article covers the problem of parameters that underlie the choice of mechanical properties of the clay stone used as the foundation material in Perm. The object of this study is the clay stone of the early Permtric modulus, effective cohesion intercept and angle of internal friction constitute tian age. Mechanical properties, including the deformation modulus, oedomehe subjects of the study. The authors enumerate the following tasks:1) description of geological conditions of the two sites of experiments in Perm,2) development of the methodology of identification of strength and deformation properties of the clay stone in the laboratory (oedometry testing and shear box testing of water saturated and water free samples) and on site (cone penetration tests, pressuremeter tests) according to the Russian technical regulations,3) experiments aimed at identification of mechanical properties of the clay stone,4) analysis and comparison of mechanical properties of the clay stone using various methods,5) provision of conclusions and recommendations concerning mechanical properties of upper layers of the clay stone in Perm.A lot of attention is paid to the analysis of results of cone penetration tests, pressuremeter and laboratory tests. The study has revealed a significant effect of test methods on the resulting values of strength and deformation properties of the local clay stone.

DOI: 10.22227/1997-0935.2013.2.55-63

References
  1. Ponomarev A.B., Zakharov A.V., Sursanov D.N. K voprosu ispol’zovaniya verkhnepermskikh otlozheniy v kachestve gruntovykh osnovaniy [On the Use of Upper Perm Deposits as Foundation Soils]. Vestnik PGTU [Proceedings of Perm State Technical University]. Urbanistika [Urban Planning]. 2011, no. 1, pp. 74—80.
  2. Trofimov V.T., Korolev V.A., Voznesenskiy E.A., Ziangirov R.S. Gruntovedenie [Pedology]. Moscow, MGU Publ., 2005, 1024 p.
  3. Ryzhkov I.B., Isaev O.N. Staticheskoe zondirovanie gruntov [Cone Penetration Testing]. Moscow, ASV Publ., 2010, 496 p.
  4. Sychkina E.N., Ponomarev A.B. K voprosu opredeleniya nachal’nogo napryazhennogo sostoyaniya poluskal’nykh gruntov v laboratornykh usloviyakh [On Identification of the Initial Stress State of the Half Rock in the Laboratory Environment]. Izvestiya vuzov. Stroitel’stvo. [News of Institutions of Higher Education. Civil Engineering.] 2012, no. 6 (642), pp. 74—80.
  5. Otchet ob inzhenerno-geologicheskikh izyskaniyakh na ob”ekte «Zhiloy kompleks s pomeshcheniyami obshchestvennogo naznacheniya, mnogofunktsional’nym zdaniem po ul. Mira, 41 v Industrial’nom rayone g. Permi» (2 ochered’). [Report on Geological Engineering Survey of “Residential Housing Estate That Has Several Public Premises, or a Multi-functional Building located at: 41 Mira St., in the industrial area of Perm (Stage 2)”. VerkhnekamTISIz Publ., Perm, 2012.
  6. Zakharov M.S. Staticheskoe zondirovanie v inzhenernykh izyskaniyakh [Cone Penetration Testing in Engineering Research]. St.Petersburg, SPBGASU Publ., 2007, 72 p.
  7. Akbulyakov M.A., Sychkina E.N., Ponomarev A.B. Metodika opredeleniya predela prochnosti na odnoosnoe szhatie poluskal’nykh gruntov (na primere argillitov g. Permi) [Methodology of Identification of Ultimate Uniaxial Compressive Strength of the Half Rock (Exemplified by the Clay Stone in Perm)]. Mekhanika gruntov v geotekhnike i fundamentostroenii [Soil Mechanics in Geotechnics and Foundation Engineering]. Works of the All-Russian Scientific and Technical Conference. Novocherkassk, YuRGTU (NPI) Publ., 2012, pp. 250—256.

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Thermal behaviour of moscow soil and its influence on geotechnical properties of the active zone of bases of structures

Vestnik MGSU 3/2013
  • Kashperyuk Aleksandra Aleksandrovna - Moscow State University of Civil Engineering (MGSU) student, Department of Soils, Foundation Soils and Foundations; +7 (499) 129-18-72, 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 .
  • Kashperyuk Pavel Ivanovich - Moscow State University of Civil Engineering (MGSU) Candidate of Geological and Mineralogical sciences, Associate Professor, Department of Engineering Geology and Geo- ecology, 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 .
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, 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 .
  • Potapov Ivan Aleksandrovich - Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy engineer, Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy, ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 88-97

The authors consider particular aspects of influence of the thermal behaviour of soils of the active zone of bases of structures on the moisture and heat transfer inside the soil, their condition and deformation behaviour in the urban environment. It is noteworthy that any changes of the temperature gradient of soils caused by the moisture and heat transfer alter both the value of filtration ratios of soils having various compositions and their stress-strained state.The authors analyze the process of construction of a specific high-rise building in Moscow to prove that availability of systems of utilities emitting heat in Moscow soils at the depth of 3 — 10 meters below the ground level may increase the soil temperature up to 30 degrees C and even higher, whereas demounting of utility networks will cause an abrupt change in the thermal behaviour of the soil. Moisture redistribution causes heated and dehydrated soils to absorb moisture and to change their condition and principal physical mechanical properties.Having completed a series of field tests, the authors have identified that 1C reduction in the clay soil temperature reduces its modulus of deformation by 0.7…..1.0MPa. It is noteworthy that no projections of alterations in the principal physical and mechanical properties of base soils in the urban environment are possible absent of thermometrical tests accompanying geological engineering surveys. Findings of experimental and field research projects and their theoretical justification have proven that research into filtration properties of soils in the top zone of bases of buildings and structures and engineering networks in the environment of urban ecosystems require wide scale groundwater research to be performed within tight urban territories.

DOI: 10.22227/1997-0935.2013.3.88-97

References
  1. Osipov V.I. Fiziko-khimicheskaya teoriya effektivnykh napryazheniy v gruntakh [Physicochemical Theory of Effective Stresses in Soils]. Moscow, IFZ RAN Publ., 2012, 74 p.
  2. Sergeev E.M., Golodkovskaya G.A., Ziangirov R.S., edited by Sergeev E.M. Gruntovedenie [Soil Science]. Moscow, MGU Publ., 1971, 595 p.
  3. SNIP 11-02—96 Inzhenernye izyskaniya dlya stroitel’stva. Osnovnye polozheniya [Construction Norms and Rules 11-02—96. Engineering Surveys for Construction Purposes. Basic Provisions]. Moscow, Gosstroy Rossii publ., 1997, 44 p.
  4. Korolev V.A., Fadeeva E.A. Sravnitel’nyy analiz termovlagoperenosa v dispersnykh gruntakh raznogo granulometricheskogo sostava [Comparative Analysis of Moisture and Heat Transfer in Disperse Soils Having Different Granulometric Compositions]. Inzhenernaya geologiya [Engineering Geology]. 2012, no. 6, pp. 18—31.
  5. Korolev V.A., Fadeeva E.A., Akhromeeva T.Ya. Zakonomernosti termovlagoperenosa v nenasyshchennykh dispernykh gruntakh [Regularities of Moisture and Heat Transfer in Non-saturated Disperse Soils]. Inzhenernaya geologiya [Engineering Geology]. 1990, no. 3, pp. 16—29.
  6. Grifoll J., Gastor J.M., Cohel Y. Non-isothermal Soil Water Transport and Evaporation. Advances in Water Resources. 2005, no. 28, pp. 1254—1266.

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Particular aspects of research into application of trench barriers aimed at reductionof the energy of surface waves in the soil

Vestnik MGSU 3/2013
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, 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 98-104

Soil vibration represents a problem endangering buildings and structures. Waves propagate through the soil and interact with buildings. Their interaction may cause damage to nearby structures. Horizontal Rayleigh waves or any other waves generated by dynamic loads are considered in this paper. The soil medium is assumed to be linear, elastic, homogeneous and isotropic. The energy associated with any surface waves can be absorbed and damped by the barriers due to geometric and material damping. Application of wave barriers as a method of isolation of structures and foundations from vibrations transmitted in the soil enjoys moderate success. In this research, various open and in-filled trenches used as wave barriers are studied. For this purpose, an extensive parametric analysis has been completed using FLAC-2D software. The findings have proven the efficiency of wave barriers if used in the presence of the structure and applied to suppress the effect of impulse loading on the soil surface. The findings demonstrate that the proposed system composed of the in-filled trench and the structure performs well, as it efficiently reduces the energy of surface waves, although the findings have some exceptions. The discrepancy between the findings of the authors and other researchers may be explained by a different type of load and the presence of a structure.

DOI: 10.22227/1997-0935.2013.3.98-104

References
  1. Musaev V.K. Reshenie zadachi difraktsii i rasprostraneniya uprugikh voln metodom konechnykh elementov [Resolving the Problem of Diffraction and Propagation of Elastic Waves Using Method of Finite Elements]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Analysis of Structures]. 1990, no. 4, pp. 74—78.
  2. Musaev V.K. Structure Design with Seismic Resistance Foundations. Proceedings of the Ninth European Conference on Earthquake Engineering. Moscow, TsNIISK Publ., 1990, no. 4A, pp. 191—200.
  3. Kuznetsov S.V., Nafasov A.E. Gorizontal’nye seysmicheskie bar’ery dlya zashchity ot seysmicheskikh voln [Horizontal Seismic Barriers as Protection from Seismic Waves]. Vestnik MGSU [Proceeding of Moscow State University of Civil Engineering]. 2010, no. 4, pp. 131—134.
  4. Kuznetsov S.V. Seysmicheskie volny i seysmicheskie bar’ery [Seismic Waves and Seismic Barriers]. Akusticheskaya fizika [Acoustic Physics]. 2011, no. 57, pp. 420—426.
  5. Musaev V.K. Problem of the Building and the Base Interaction under Seismic Loads. Proceedings of the 12th World Conference on Earthquake Engineering. 2741. Auckland, University of Canterbury, 2000, pp. 1—6.
  6. Musaev V.K. Otsenka vliyaniya vzryvov na ob”ekty geotekhniki s pomoshch’yu polostey [Using Cavities to Assess Influence of Explosions on Objects of Geotechnics]. Geotekhnicheskie problemy megapolisov. Tr. Mezhdunar. konf. po geotekhnike [Geotechnical Problems of Megalopolises. Works of the International Geotechnics Conference]. Moscow, PI «Georekonstruktsiya» Publ., 2010, pp. 1733—1740.
  7. Musaev V.K. O dostovernosti rezul'tatov chislennogo metoda resheniya slozhnykh zadach volnovoy teorii uprugosti pri udarnykh, vzryvnykh i seysmicheskikh vozdeystviyakh [On Reliability of Results Generated Using the Numerical Method of Resolution of Complex Problems of the Wave Theory of Elasticity in the Event of Impacts, Explosions and Seismic Loads]. Uchenye zapiski Rossiyskogo gosudarstvennogo sotsial’nogo universiteta [Academic Works of the Russian State Social University]. 2009, no. 5, pp. 21—33.

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Efficiency of trench barriers used to protect structures from dynamic loads and studyof the stress — strain state of soils based on strain hardeningand elastic models

Vestnik MGSU 3/2013
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, 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 105-113

Wave barriers are intended to mitigate vibration transmission in the soil. They include open and infilled trenches, sheet piles, etc. In this study, a two-dimensional finite difference element analysis was performed using FLAC-2D software as a research into the efficiency of open and infilled barriers exposed to dynamic loading with or without the presence of structures. In this contribution, two constitutive models are considered to study the soil response in the elastic and elastoplastic range with account for yield, failure and potential functions of soil plasticity. The results were assessed with account for reduced soil particle displacements on the ground surface exposed to impulse loading.The numerical analysis has proven that the results obtained by assigning elastic properties to the soil material fail to comply with the results obtained by analyzing the model having non-linear properties of soils. The presence of a structure produces a significantly larger effect onto the efficiency of barriers by reducing the surface wave energy.

DOI: 10.22227/1997-0935.2013.3.105-113

References
  1. Barkan D.D. Dynamics of Bases and Foundations. McGraw-Hill Book Company Inc., 1962, pp. 374—406.
  2. Al-Hussaini T.M. and Ahmad S. Numerical and Experimental Studies on Vibration Screening by Open and Infilled Trench Barrier. International Workshop on Wave Propagation, Moving Load and Vibration Reduction. Brookfield, 2000, pp. 241—250.
  3. Musaev V.K., Kurantsov V.A. O razrabotke metodiki rascheta sooruzheniy neglubokogo zalozheniya pri vnutrennikh vzryvnykh volnovykh vozdeystviy [Development of Methodology of Analysis of Shallow Foundation Structures Exposed to Internal Explosive Wave Impacts]. Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti. [News Bulletin of Russian Peoples’ Friendship University. Comprehensive Safety Problems Series]. 2008, no. 1, pp. 75—76.
  4. Musaev V.K., Sazonov K.B. Chislennoe modelirovanie bezopasnosti sooruzheniy neglubokogo zalozheniya pri vneshnikh vzryvnykh vozdeystviyakh [Numerical Modeling of Safety of Shallow Foundation Structures Exposed to External Explosive Impacts]. Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti. [News Bulletin of Russian Peoples’ Friendship University. Comprehensive Safety Problems Series]. 2008, no. 3, pp. 6—13.
  5. Musaev V.K. Komp’yuternoe modelirovanie bezopasnosti okruzhayushchey sredy s pomoshch’yu polostey pri vzryvnykh vozdeystviyakh v sooruzheniyakh neglubokogo zalozheniya [Computer Simulation of Environmental Safety Using Cavities in Case of Exposure of Shallow Foundation Structures to Explosions] Bezopasnost’ i ekologiya tekhnologicheskikh protsessov i proizvodstv. Materialy Vserossiyskoy nauchno-prakticheskoy konferentsii. Poselok Persianovskiy Rostovskoy oblasti. [Safety and Ecology of Manufacturing and Production Processes. Works of the All-Russian Scientific and Practical Conference. Persianovskiy Settlement, Rostov Region.] Donskoy gosudarstvennyy agrarnyy universitet [Don State University of Agriculture]. 2009, pp. 110—115.
  6. Orekhov V.V., Negakhdar Kh. Nekotorye aspekty izucheniya primeneniya transheynykh bar’erov dlya umen’sheniya energii poverkhnostnykh voln v grunte [Particular Aspects of Research into Application of Trench Barriers Aimed at Reduction of the Surface Wave Energy in the Soil]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 1, pp. 98—104.

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СONSOLIDATION AND CREEPOF SUBFOUNDATIONS HAVING FINITE WIDTHS

Vestnik MGSU 4/2013
  • Ter-Martirosyan Zaven Grigor’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Science, Professor of the Department of Soil Mechanics and Geotechnics, Main Researcher at the Research and Education Center “Geotechnics”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ter-Martirosyan Armen Zavenovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor of the Department of Soil Mechanics and Geotechnics, Head of Research and Education Center “Geotechnics”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Nguyen Huy Hiep - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Subfoundations and Foundations, 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 38-52

The authors formulate and solve the problem of consolidation and creep of saturated clay subfoundations exposed to localized loads (the two-dimensional problem formulation). The findings have proven that, if the two-dimensional problem is considered, any excessive pore pressure is concentrated immediately under the area exposed to the localized loading, and it penetrates into the depth equal to 1/2 of the strength of the compressed width. Subfoundation subsidence is caused by both shear and 3D deformations of soil. Besides, the ratio of shear-to-3D deformations reaches 10. Therefore, the authors propose to represent the subfoundation subsidence as the sum of shear and 3D deformations.The differential equation of the filter consolidation, if considered as the 2D problem, is solved using the Mathcad software. The software is used to analyze the isolines of excessive pore pressure at any moment following the loading application. New depen- dence representing the ratio of the changing area of the diagram of the average effective tension to the area of the diagram of the average tension in the stabilized condition is proposed by the authors.In the final section of the article, the authors solve the problem of prognostication of the subsidence pattern for the water saturated subfoundation with account for the shear creep of the soil skeleton. The authors employ the visco-elastic Bingham model characterized by time-dependent viscosity ratios. The authors have proven that in this case the subsidence following the shear load will develop as of the moment of application of the external load pro rata the logarithm of time irrespectively of the process of filtration consolidation.

DOI: 10.22227/1997-0935.2013.4.38-52

References
  1. Koshlyakov N.S., Gliner E.B., Smirnov M.M. Osnovnye differentsial’nye uravneniya matematicheskoy fiziki [Basic Differential Equations of Mathematical Physics]. Moscow, Fizmat Publ., 1962, 765 p.
  2. Florin V.A. Osnovy mekhaniki gruntov [Fundamentals of Soil Mechanics]. Moscow, Stroyizdat Publ., 1959, vol. 1.
  3. Tsytovich N.A. Mekhanika gruntov [Soil Mechanics]. Moscow, Stroyzdat Publ., 1963, 636 p.
  4. Zaretskiy Yu.K. Vyazko-plastichnost’ gruntov i raschety sooruzheniy [Visco-plasticity of Soils and Analysis of Structures]. Moscow, Stroyizdat Publ., 1988, 350 p.
  5. SP 22.13330.2011. Osnovaniya zdaniy i sooruzheniy. [Construction Regulations 22.13330.2011. Subfoundations of Buildings and Structures]. Moscow, 2011, 85 p.
  6. Tikhonov A.N., Samarskiy A.A. Uravneniya matematicheskoy fiziki [Equations of Mathematical Physics]. Moscow, Nauka Publ., 1996, 724 p.
  7. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p.
  8. Ter-Martirosyan A.Z. Vzaimodeystvie fundamentov s osnovaniem pri tsiklicheskikh i vibratsionnykh vozdeystviyakh s uchetom reologicheskikh svoystv gruntov [Interaction between Foundations and Subfoundations in Case of Cyclical and Vibration Exposures with Account for Rheological Properties of Soils]. Moscow, MGSU Publ., 2010.
  9. Vyalov S.S. Reologicheskie osnovy mekhaniki gruntov [Rheological Fundamentals of Soil Mechanics]. Moscow, Vysshaya shkola publ., 1978, 447 p.
  10. Galin L.A. Kontaktnye zadachi teorii uprugosti i vyazko-uprugosti [Contact Problems of Theory of Elasticity and Visco-elasticity]. Moscow, Nauka Publ., 1980, 296 p.
  11. Spravochnik Plaxis V. 8.2 [Plaxis V. 8.2 Reference Book]. Translated by Astaf’ev M.F. 2006, 182 p.
  12. Florin V.A. Osnovy mekhaniki gruntov [Fundamentals of Soil Mechanics]. Moscow, Stroyizdat Publ., 1959, vol. 2.
  13. Arutyunyan N.Kh., Kolmanovskiy V.B. Teoriya polzuchesti neodnorodnykh tel [Theory of Creep of Heterogeneous Bodies]. Moscow, Nauka Publ., 1983, 307 p.

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EFFICIENCY OF TRENCH BARRIERS USED TO PROTECT STRUCTURES FROM DYNAMIC LOADS AND STUDY OF STRESS-STRAIN STATE OF SOIL USING STRAIN-HARDENING MODEL OF SOIL BEHAVIOUR

Vestnik MGSU 4/2013
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, 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 53-60

This study consists in numerical modeling of the nonlinear response of soil. The study is a research into the protective performance of both open and in-filled trenches and an examination of the influence produced by (1) the shape of trenches and (2) their position in relation to sources of vibration and structures on the isolation efficiency of barriers. Assessments were based on reduction in horizontal displacements of soil particles on the ground surface exposed to impulse loading. Also, results of numerical researches are analyzed and interpreted to provide recommendations for their implementation and guides for barrier designers. Three points of loading were analyzed and an attenuation curve of soil displacement was drawn; the curve follows the projected trends, as it decays in the horizontal direction on the ground surface. The structure produces substantial effect on the efficiency of open barriers in terms of the surface wave energy.

DOI: 10.22227/1997-0935.2013.4.53-60

References
  1. Musaev V.K., Kurantsov V.A. O razrabotke metodiki rascheta sooruzheniy neglubokogo zalozheniya pri vnutrennikh vzryvnykh volnovykh vozdeystviyakh [On Development of Methodology of Analysis of Shallow Foundation Structures Exposed to Internal Explosive Wave Impacts] Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti [Bulletin of the Russian University of the Friendship of Peoples. Problems of Comprehensive Safety Series]. 2008, no. 1, pp. 75—76.
  2. Musaev V.K., Popov A.A., Sitnik VT, Fedorov A.L. Upravlenie bezopasnost’yu stroitel’nogo ob”ekta pri ekspluatatsii [Management of Safety of a Construction Facility in the Course of Operation]. Problemy upravleniya bezopasnost’yu slozhnykh sistem. Materialy XVI Mezhdunarodnoy konferentsii [Problems of Management of Safety of Complex Systems. Works of the 16th International Conference]. Moscow, RGTU Publ., 2008, pp. 236—240.
  3. Musaev V.K. Upravlenie bezopasnost’yu sooruzheniy neglubokogo zalozheniya pri vneshnikh vzryvnykh vozdeystviyakh [Management of Safety of Shallow Foundation Structures Exposed to External Explosive Loads]. Nauchno-prakticheskaya konferentsiya “Bezopasnost’ i ekologiya tekhnologicheskikh protsessov i proizvodstv” [Scientific and Practical Conference “Safety and Ecology of Process Flows and Production Facilities”]. Donskoy gosudarstvennyy agrarnyy universitet [Don State University of Agriculture]. 2009, pp. 116—120.
  4. Musaev V.K. O sistemnom podkhode v proektirovanii i konstruirovanii tekhnicheskikh sredstv zashchity okruzhayushchey sredy [On System Approach to Design and Construction of Engineering Means of Environmental Protection]. Nauchnyy zhurnal problem kompleksnoy bezopasnosti [Scientific Journal of Comprehensive Safety Problems]. 2009, no. 1, pp. 103—104.
  5. Beskos D.E., Dasgupta G. and Vardoulakis I.G. Vibration Isolation Using Open or Filled Trenches. Part 1. Computational Mechanics. 1986, no. 1, pp. 43—63.
  6. Orekhov V.V., Negahdar H. Nekotorye aspekty izucheniya primeneniya transheynykh bar’erov dlya umen’sheniya energii poverkhnostnykh voln v grunte [Particular Aspects of Research into Application of Trench Barriers Aimed at Reduction of the Energy of Surface Waves in the Soil]. Vestnik MGSU [Proceeding of Moscow State University of Civil Engineering]. 2013, no. 3, pp. 98—104.
  7. Woods R.D. Screening of Surface Waves in Soil. Journal of Soil Mechanics and Foundation Engineering (ASCE). 1968, no. 94(SM4), pp. 951—979.

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TESTING RESULTS DEMONSTRATED BY PULSE-DISCHARGE TECHNOLOGY PILES EXPOSED TO THE VERTICAL LOAD UNDER CONDITIONS OF SOFT SOILS OF TUNIS COASTAL AREA

Vestnik MGSU 5/2013
  • Eremin Valeriy Yakovlevich - MPO RITA Candidate of Technical Sciences, Director of Technology, MPO RITA, 8/1 Vereyskaya St., Moscow, 121357, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Znamenskiy Vladimir Valerianovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Professor, Department of Soil Mechanics, Beddings and Foundations, 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 .
  • Kharin Yuriy Ivanovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Associate Professor, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federa- tion.
  • Yudina Irina Mikhaylovna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Professor, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 62-68

The paper is an overview of nationwide testing results demonstrated by pulse-discharge technology piles exposed to the vertical load under conditions of soft soils of Tunis coastal area. Bored cast-in=place piles are constructed through the employment of the pulse-discharge technology (PDT). In the construction norms of France, PDT piles are classified as bored piles, which are cast-in-place using a hollow stem auger; they are reinforced, and their diameter exceeds 25 centimeters. PDT piles are made through the application of high pressure to the surrounding soil in the course of concreting.Photos of testing facilities are provided in the paper. Graphs of cyclic and experi- mental load testing of piles, complying with the values of design loads for a 10-storey building under construction, are analyzed. The findings obtained by the authors have proven a considerable growth of the PDT pile bearing capacity in comparison with the analytical solutions obtained in accordance with Russian and French construction norms and regulations. It is pointed out that the results of pressuremeter testing can be reason- ably used in calculations as stated in the French norms. Negligible pile settlements and the high value of the bearing capacity of piles prove the expediency of employment of this technology in the course of construction of piles in the soft soils of the Tunis shoreline. It is concluded that further elaboration of the PDT pile calculation technique is required.

DOI: 10.22227/1997-0935.2013.5.62-68

References
  1. SP 24.13330.2011. Svaynye fundamenty. [Code of Practice 24.13330.2011. Pile Foundations]. Moscow, 2010, 85 p.
  2. TR 50-180—06. Tekhnicheskie rekomendatsii po proektirovaniyu i ustroystvu svaynykh fundamentov, vypolnyaemykh s ispol’zovaniem razryadno-impul’snoy tekhnologii dlya zdaniy povyshennoy etazhnosti (svai-RIT) [Technical Recommendations 50-180—06. Design and Construction of Pile Foundations for High-rise Buildings Using the Pulse-discharge Technology (PDT)]. Moscow, UITs “VEK” Publ., 2006, 68 p.
  3. Eremin V.Ya. Raschet visyachikh svay-RIT, izgotovlennykh po razryadno-impul’snoy tekhnologii [Analysis of Friction Pulse-discharge Piles]. Stroy klub [Construction Club]. 2001, no. 5-6, pp. 21—22.
  4. Roger Frank. Proektirovanie fundamentov po dannym ispytaniy pressiometrom Menara (IPM) [Design of Foundations Based on Menard Pressuremeter Testing Results]. Osnovaniya, fundamenty i mekhanika gruntov [Beddings, Foundations and Soil Mechanics]. 2009, no. 6, pp. 2—10.
  5. Roger Frank. Calcule des fondations superficielles et profondes. Presses Ponts et chauss?es, 2002, 138 p.
  6. Document Technique Unifi? (D.T.U. 13.20), Travaux de fondations profondes pour le b?timent, Chap. IV. Pieux for?s-ouits de fondations, piles colonnes. March 1966.
  7. Eurocode 7. Calcul g?otechnique. Partie 1. R?gles g?n?rales. XP ENV 1997-1 (P 91-250-1). AFNOR, Paris, December, 1996, 112 p.
  8. R?gle de justification des fondations sur pieux ? partir des r?sultats des essais pressiom?triques. LCPC-SETRA, Oct. 1985. Minist?re de l‘Urbanisme et des Transports, Direction des Routes, 32 p.
  9. NF P 94-150-1. Essai statique de pieu isol? sous un effort axial. Norme Fran?aise. AFNOR 1999.

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IMPROVEMENT OF EFFICIENCY OF APPLICATION OF CONDENSED SOIL CUSHIONS TO LOOSE SOILS

Vestnik MGSU 5/2013
  • Usmanov Rustam Alimdzhanovich - St.Petersburg State University of Architecture and Civil Engineering (SPbGASU) Doctor of Technical Sciences, Associate Professor, Professor, Department of Geotechnics; +7 (812) 316-01-43, St.Petersburg State University of Architecture and Civil Engineering (SPbGASU), 4 2nd Krasnoarmeyskaya St., St. Petersburg, 190005, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 69-79

In the civil engineering practice, construction operations in loose and high compressibility soils require the application of compressed sand cushions. Recently, there has been a substantial decline in the use of compacted ground beddings in the practice of industrial and civil engineering. This can be partly explained by the weaknesses of the existing calculation methods that may often generate higher values of the size of compacted cushions (width and thickness) and, consequently, cause a substantial increase in their cost. It is noteworthy that the existing methods of calculation do not take account of strength and deformation characteristics of the cushion material in the course of identification of the cushion size and their operating bearing capacity.However, the studies implemented by different authors suggest the possibility of reducing the size of compacted soil cushions applied to loose and high compressibility soils. Therefore, the most effective are the pads reinforced by high-strength reinforcing elements (as geo-textile, geo-grids, etc.) The author elaborates on the possible methods of expanding the scope of compacted ground bedding in the practice of industrial and civil construction. The analysis of the findings of experimental and theoretical studies of compacted and reinforced soil bedding in loose soils is performed

DOI: 10.22227/1997-0935.2013.5.69-79

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  4. Tugaenko Yu.F., B.A. Khutoryanskiy. Nekotorye rezul’taty polevykh issledovaniy deformatsiy v mnogosloynykh osnovaniyakh fundamentov [Particular Findings of Field Tests of Deformations of Multi-layered Beddings of Foundations]. Osnovaniya, fundamenty i mekhanika gruntov [Beddings, Foundations and Soil Mechanics]. Materialy 111 Vsesoyuznogo soveshchaniya [Works of the 111th All-Soviet Congress]. Kiev, 1971, pp. 64—69.
  5. Usmanov R.A. Ustroystvo fundamentov na neodnorodnykh osnovaniyakh, podstilaemykh slabymi vodonasyshchennymi lessovymi gruntami [Construction of Foundations on Heterogeneous Beddings Based on Loose Water-saturated Loesssial Soils]. Vestnik grazhdanskikh inzhenerov [Bulletin of Civil Engineers]. 2008. ¹ 2(12). S. 56—61.
  6. Usmanov R.A. Slabye vodonasyshchennye lessovye grunty kak osnovaniya zdaniy i sooruzheniy v usloviyakh Respubliki Tadzhikistan [Loose Water-saturated Soils as Beddings of Buildings and Structures in the Environment of Tajikistan]. St.Petersburg, SPbGASU Publ., 2009, 211 s.
  7. SP 22.13330.2011. Osnovaniya zdaniy i sooruzheniy. Aktualizirovannaya redaktsiya SNiP 2.02.01—83*. [Collection of Rules 22.13330.2011. Beddings of Buildings and Structures. Updated Version of Construction Norms and Regulations 2.02.01—83]. Moscow, 2011.
  8. Septieme Conference Internationale Sur les Geosynthetiques. Abstracts. Nicca, 2002.
  9. De Groot, Den Hoedt, Termaat. Geosynthedcs: Applications, Design and Constroction. EuroGeo 1 (eds). Rotterdam, Balkema, 1996, 1066 p.
  10. Ponomarev A.B., Sosnovskikh L.V. Riski i problemy primeneniya geosinteticheskikh materialov v stroitel’stve [Risks and Problems of Application of Geosynthetic Materials in Construction Works]. Nauchno-prakticheskie i teoreticheskie problemy geotekhniki. mezhvuz. tematicheskiy sb. tr. [Problems of Research, Application and Theory of Geotechnics. Interuniversity thematic collection of works]. St.Petersburg, SPbGASU Publ., 2007, pp. 132—138.
  11. Rukovodstvo pol’zovatelya PK Plaxis — versiya 7.2. [User Manual. Plaxis Software. Version 7.2.] NIP Informatika publ. 2008.

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