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Mariola Chomczyńska, Vladimir Soldatov, Henryk Wasąg and Marcin Turski

REFERENCES Aggarwal P., Choudhary K.K., Singh A.K., and Chakraborty D., 2006. Variation in soil strength and rooting characteristics of wheat in relation to soil management. Geoderma, 136, 353-363. Bohm W., 1979. Methods of studying root systems. Springer, Berlin, Heidelberg, New York. Cao X., Chen C., Zhang D., Shu B., Xiao J., and Xia R., 2013. Influence of nutrient deficiency on root architecture and root hair morphology of trifoliate orange ( Poncirus trifoliata L. Raf.) seedlings under sand culture. Sci. Hort., 162, 100

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Marián Drusa, Filip Gago and Jozef Vlček

References [1] BULKO, R. - DRUSA, M. - VLČEK, J. - MEČÁR, M.: CPT Profiling and Laboratory Data Correlations for Deriving of Selected Geotechnical Parameter. In: Civil and Environmental Engineering, Vol. 11, Issue 2/2015, p. 152 - 157, DOI: 10.1515/cee-2015-0020. [2] MAYNE, P. W.: In-Situ Test Calibrations for Evaluating Soil Parameters, Overview Paper, Characterization and Engineering Properties of Natural Soils II (Proceedings of Singapore Workshop). Taylor & Francis Group, London, United Kingdom, 2006. [3] LUNNE, T. - ROBERTSON, P. K

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Jasim M. Abbas, Zamri Chik and Mohd Raihan Taha

on [ 5 ]. This model represents Hooke’s law of isotropic linear elasticity used for modeiling the stress–strain relationship of the pile material. The model involves two elastic stiffness parameters, namely, the effective Young’s modulus, E ’, and the effective Poisson’s ratio, ν ’. Soil Model : The surrounding soil is represented by Mohr–Coulomb’s model. This elasto-plastic model is based on soil parameters that are known in most practical situations. The model involves two main parameters, namely, the cohesion intercept, c ’, and the friction angle, f ’. In

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Zbigniew Młynarek, Katarzyna Stefaniak and Jędrzej Wierzbicki

References Benjamin J. R., Cornell C. A. (1970) Probability, Statistics, and Decision for Civil Engineers, McGraw-Hill Book Co., New York. Horn A. (1964) Die Scherfestigkeit von Schluff, Westdeutschr Verlag, Koln. Kezdi A. (1969) Handbuch der Bodenmechanik, Akademiai Kiado, Budapest. Kezdi A., Młynarek Z. (1980) Static penetration test results with soils having slight or medium cohesion, Acta Technica Academiae Scientiarum Hungaricae, 90 (3-4), 187-199. Lunne T., Powel J. J. M

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Marek Wojciechowski

1 Introduction In soil and rock mechanics, the Mohr-Coulomb (MC) shear strength criterion, along with its parameters, namely friction angle and cohesion, is treated as a kind of standard and reference concept for other shear strength criteria. This is due to the fact, that it fits well the experimental data, where asymmetric strength response in triaxial compression (TXC) and triaxial extension (TXE) tests is observed. Moreover, the MC criterion parameters have clear engineering interpretation and they are typically obtained in most geotechnical

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Wojciech Sas, Andrzej Głuchowski and Jarosław Margielski

References AL-MUKHTAR et al. 2010: Behavior and mineralogy changes in lime-treated expansive soil at 50°C. Applied Clay Science 50(2): 199-203. AZADEGAN O., YAGHOUBI E., Li J. 2013: Evaluation of the Performance of Lime and Cement Treated Base Layers in Unpaved Roads. The Electronic Journal of Geotechnical Engineering 18: 1593-1602. CODUTO D.P., MAN-CHU R.Y., KITCH W.A. 2010: Geotechnical Engineering: Principles & Practices. Prentice Hall, New York. FERGUSON G. 1993: Use of self-cementing fl y

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Piotr Pezowicz and Krystyna Choma-Moryl

REFERENCES [1] A likonis A., The influence of natural humidity upon the index of the compression of limnoglacial clay , Civil Engineering, Wilno, 2001. [2] B łaszczyk J., Szczegółowa Mapa Geologiczna Polski – Arkusz Krotoszyn – 619 , Wyd. PIG, Warszawa, 1993. [3] B orowczak P., O właściwościach gruntów mało spoistych zmieniających się w procesie konsolidacji , Geologia, Kraków, 2008. [4] Based on investigation of soil paste. [5] C homa -M oryl K., Chemiczno-fizyczne własności iłów poznańskich Polski południowo-zachodniej na

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Eszter Horvath-Kalman

Civil Engineering , 53/2 (2009) 101-106 DOI: 10.3311/, 2009 [12] Schaid F. , In Situ Testing in Geomechanics, Taylor & Francis Group , London 2009 [13] Szechy K. , The art of Tunnelling, Budapest:Tankönyvkiadó, 1961 [14] Terzaghi V. K., Theoretical Soil Mechanics, John Wiley and Sons , Inc., New York, 1943

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Tymoteusz Zydroń and Ewa Prawica

REFERENCES BEDNARCZYK Z. 2005: Examples of the mass movement investigations in different types of deposits. Proceedings of the Conference “Mass movement hazard in various environments”. Polish Geological Institute Special Papers 20, 14–26. BORECKA A., HERZIG J., KACZMARCZYK R., WOŹNIAK H. 2006: Właściwości fizykomechaniczne wybranych gruntów spoistych ze zboczy wyrobiska KWB „Bełchatów” (Phisical and mechanical properties of cohesive soils from the slope of the working in the Brown Cole Mine „Bełchatów”). Zeszyty Naukowe Politechniki Białostockiej

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Abdol Majid Moinfar and Gholamhossein Shahgholi

References Abbaspour-Gilandeh, Y. - Khanramaki, M. 2013. Design, construction and calibration of a triaxial dynamometer for measuring forces and moments applied on tillage implements in field conditions. In Journal of Metrology Society of India, vol. 28, no. 2, pp. 119-127. Al-Janobi, A. A. - Al-Suhaibani, S. A. 1998. Draft of primary tillage implements in sandy loam soil. In Transaction of the ASAE, vol. 14, no. 4, pp. 343-348. Arvidson, J. - Keller, T. - Gustafson, K. 2004. Specific draught for mouldboard