Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dynamic Characteristics of Subgrade Bed for Ballastless Track
In order to study the characteristics of dynamic stress in subgrade bed, a large-scale, ballastless track dynamic model test was made based on the Suining-Chongqing high-speed railway. The results indicate that the dynamic stress has an uneven distribution along subgrade cross-section, and the unevenness is more and more obvious as the dynamic loading increases. Along the depth direction, the dynamic stress in the surface layer of subgrade bed decays more rapidly than in the base layer. The dynamic stress can be calculated by Odemark and Elasticity theory as its distribution under foundation slab of ballastless track is simplified uniform along lateral direction, and triangular along longitudinal direction. On the premise of dynamic stress was known, this paper assumed each soil layer of subgrade to be one-dimensional compression model and determined the limited thickness of compression layer. Based on this, an approach of conversion from multi-layer system to the equivalent Winkler foundation was explored, and the coefficient of subgrade reaction in different working conditions can be acquired.
Dynamic Characteristics of Subgrade Bed for Ballastless Track
In order to study the characteristics of dynamic stress in subgrade bed, a large-scale, ballastless track dynamic model test was made based on the Suining-Chongqing high-speed railway. The results indicate that the dynamic stress has an uneven distribution along subgrade cross-section, and the unevenness is more and more obvious as the dynamic loading increases. Along the depth direction, the dynamic stress in the surface layer of subgrade bed decays more rapidly than in the base layer. The dynamic stress can be calculated by Odemark and Elasticity theory as its distribution under foundation slab of ballastless track is simplified uniform along lateral direction, and triangular along longitudinal direction. On the premise of dynamic stress was known, this paper assumed each soil layer of subgrade to be one-dimensional compression model and determined the limited thickness of compression layer. Based on this, an approach of conversion from multi-layer system to the equivalent Winkler foundation was explored, and the coefficient of subgrade reaction in different working conditions can be acquired.
Dynamic Characteristics of Subgrade Bed for Ballastless Track
Kong, Xianghui (Autor:in) / Jiang, Guanlu (Autor:in) / Xiao, Dong (Autor:in) / Li, Anhong (Autor:in)
Second International Conference on Geotechnical and Earthquake Engineering ; 2013 ; Chengdu, China
IACGE 2013 ; 105-111
09.10.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Dynamic Characteristics of Subgrade Bed for Ballastless Track
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