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2D numerical analysis of the seismic response of a karst rock mass: importance of underground caves and geostructural details

nearby S. Oronzo’s cave were considered for the reconstruction of the geometry of the hypogeal caves, which have been identified with the geological surveys. Figure 5 Stratigraphy obtained from the core destruction borings. Figure 6 Stratigraphies obtained from rotation drills with continuous coring, RQD trend along verticals and depth of the rock samples for geotechnical laboratory tests. The S. Oronzo’s cave, indeed, is a karstic one of interlayer type with a planimetric development (91.00 m), which is predominant compared to the altimetric one

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Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

shear strength development and the volumetric deformation for a medium relative density (Dr = 50 %) will be established. Figures 7a and 7b show that the increase in the shear strength is proportional to the increase in fiber content. This is due to the increase in the contact area between fibers and soil particles that leads to increased friction at Figure 7 Effect of fibercontent on shear behavior, normal stress of 200kPa and a relative density Dr = 50 %: (a)variation of the shear strength versus horizontal displacement,(b)variation of vertical displacement

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Studia Geotechnica et Mechanica
The Journal of Wrocław University of Science and Technology and AGH University of Science and Technology
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Critical state constitutive models and shear loading of overconsolidated clays with deviatoric hardening

hardening mechanisms with a different loading and unloading modulus has earned it wide renown in geotechnical engineering practice. However, it is only adapted for normally consolidated soils. It does not include the critical state concept and omits the simulation of soil softening. More generalist formulations of constitutive models were presented as the hierarchical single surface (HISS) modeling approach that allows the development of models of different levels of complexities to take into account many soil characteristics as anisotropy and damage mechanisms (C. S

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Experimental and statistical analysis of blast-induced ground vibrations (BIGV) prediction in Senegal’s quarry

1 Introduction 1.1 Background of the research Explosives are used in most large-scale development projects such as high-speed lines, highway projects and hydroelectric development as an energy source to destroy rocks and concretes. [ 1 ] Several technics can be used to enhance the productivity of the operated site, for instance, by increasing the diameters of the borehole, by adjusting the total charge or by controlling the charge per delay. [ 2 ] Actually, it is difficult to control the explosive energy involved in mine blasting, which can be

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Hydraulic Characterization of a Self-Weight Compacted Coal

:1118–1126. 10.1061/(ASCE)1090-0241(1997)123:12(1118) Leong E.C. Rahardjo H. 1997 Permeability functions for unsaturated soils Journal of Geotechnical Engineering, ASCE 123 1118 1126 [35] Kool J.B., Parker J.C. (1987) Development and evaluation of closed-form expressions for hysteretic soil hydraulic properties. Water Resources Research, 23(1):105–114. 10.1029/WR023i001p00105 Kool J.B. Parker J.C. 1987 Development and evaluation of closed-form expressions for hysteretic soil hydraulic properties Water Resources Research 23 1 105 114 [36

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3D Numerical Modeling of Large Piled-Raft Foundation on Clayey Soils for Different Loadings and Pile-Raft Configurations

with piles of different lengths and diameters under vertical loading.” Advance in Deep Foundations 1-15. DOI: 10.1061/40778(157)20. Chow H. S. W. Small J. C. 2005 “Behaviour of piled rafts with piles of different lengths and diameters under vertical loading.” Advance in Deep Foundations 1 15 10.1061/40778(157)20 [5] Ghalesari A. T., Barari, A. P., and Fardad, A. I. L. B. (2015). “Development of optimum design from static response of pileraft interaction.” Journal of Material Science and Technology 20, 331-343. Ghalesari A. T. Barari

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Slurry shield tunneling in soft ground. Comparison between field data and 3D numerical simulation

the consideration of evolution of grouting pressure. In In book: Proceedings of GeoShanghai 2018 International Conference: Tunnelling and Underground Construction pp. 23-31, 2018. Qiao Y. Zhao T. & Ding W. 2018 Simulating synchronous grouting in shield tunnels with the consideration of evolution of grouting pressure In In book Proceedings of GeoShanghai 2018 International Conference: Tunnelling and Underground Construction 23 31 [20] Wang, F., Gou, B. & Qin, Y. (2013). Modeling tunneling-induced ground surface settlement development

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Effective Friction Angle Of Deltaic Soils In The Vistula Marshlands

.5°. The CD triaxial tests on organic silt confirmed the updated Robertson’s (2016) classification as a practical tool for qualitative description of soil behaviour type (SBT). Acknowledgements The research is supported by the National Centre for Research and Development grant PBS3/B2/18/2015. Some of the geotechnical data was provided by the General Directorate for National Roads and Motorways in Poland. References [1] Ajlouni, M.A. 2000. Geotechnical properties of peat and related engineering problems. Ph.D. thesis, Univ. of Illinois at Urbana

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Modelling Of Rock Joints Interface Under Cyclic Loading

friction wear of the contact layer. Figure 13 shows the generation of third body granular layer due to the shear process. The progressive abrasive wear considerably contributes to the formation and development of this structure. Therefore, a certain form of friction wear was introduced into the model: (19) w ˙ = | u ˙ t ‖ τ n | k w ( h max − h ) $$\dot{w}=\left| {{{\dot{u}}}_{t}}\left\| {{\tau }_{n}} \right. \right|{{k}_{w}}\left( {{h}_{\max }}-h \right)$$ where k w is a wear parameter and h max is maximal thickness of the granular layer

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