By Tutumluer, Erol
Bearing means of Roads, Railways and Airfields makes a speciality of concerns bearing on the bearing skill of road and airfield pavements and railroad music buildings and supplied a discussion board to advertise effective layout, building and upkeep of the transportation infrastructure. the gathering of papers from the 8th overseas convention at the Bearing capability of Roads, Railways and Airfields (BCR2A09) comprises contributions on numerous themes and should be of specific curiosity to teachers, researchers, and practitioners considering geotechnical, pavement, and railroad engineering disciplines. it's basically taken with the various concerns relating the bearing ability and mechanistic established layout of road and airfield pavements and railroad music structures.
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Additional info for Bearing Capacity of Roads, Railways and Airfields, Two Volume Set: Proceedings of the 8th International Conference (BCR2A'09), June 29 - July 2 2009, Unversity of Illinois at Urbana - Champaign, Champaign, Illinois, USA
15 metres 15 metres 5 Recycled ballast Figure 22. 4 Recycled ballast with Geocomposite 3 Fresh ballast with Geocomposite Displacement Transducers Installing settlement pegs and displacement transducers. Pressure cells Figure 24. 2b 2a 15 metres 2 1 Fresh ballast Layout of the test track on the down main at Bulli on the NSW South Coast. Settlement Pegs Figure 23. 15 metres Installing pressure cells beneath the concrete sleeper. 1 Ballast lateral deformations Data from the displacement transducers was collected from the data logger at regular intervals.
A train load was simulated by applying an equivalent, uniformly distributed vertical dynamic load on the sleeper. This dynamic load has the same average contact stress at the Table 1. Effect of geosynthetics on Marshal’s breakage index (Bg). 60 Figure 16. Finite element mesh used in PLAXIS for the prismoidal triaxial apparatus (Indraratna et al. 2005). 16 Table 2. Parameters of the rail track materials used in the finite element analysis. 33 – – – – – – – – – – 525 – – – – – – – – – ref HS = Hardening-Soil model, MC = Mohr-Coulomb model, γ = unit weight, E50 = secant stiffness at ref ref 50% strength for loading conditions, Eur = triaxial unloading/reloading stiffness, Eoed = tangent stiffness for primary oedometer loading, EA = elastic normal (axial) stiffness, ν = Poisson’s ratio for loading conditions, νur = Poisson’s ratio for unloading/reloading conditions, c = effective cohesion, ϕ = effective friction angle, Ψ = dilatancy angle, Pref = reference confining pressure, m = stress dependent stiffness facnc tor, ko = coefficient of earth pressure at rest for normal consolidation, Rf = failure ratio.
Factors influencing the resilient properties of granular materials. PhD thesis, University of California. , Darve, F. K. (2007). DEM analysis of angular ballast breakage under cyclic loading Geomechanics and Geoengineering: An International Journal, Vol. 2 (3): 175–181. , Ionescu, D. and Christie, D. (1998). Shear behaviour of railway ballast based on large-scale triaxial tests, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 124(5): 439–439. , Christie, D. and Chowdhury, R. (1997).