A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method
The invention relates to a design method of a ballastless track roadbed structure of a high-speed railway. The method comprises the following steps of providing aA simplified model of ballastless track load distribution is provided; establishing a dynamic modulus-strain relationship model of the coarse-particle roadbed filler; carrying out homogenization treatment on the supporting layer, the subgrade surface layer and the subgrade bottom layer by adopting modulus and thickness equivalent assumption of an Odemark method, and calculating subgrade stress and strain from the supporting layer by adopting a Buchner Boussinesq formula; considering a nonlinear relationship between roadbed filler strain and deformation modulus, and constructing a roadbed structure design method based on iterativecomputation; and optimizing a roadbed structure based on roadbed surface dynamic deformation and a roadbed bottom layer dynamic strain control criterion. According to the design method, fFor the ballastless track roadbed structure, the roadbed load distribution rule can be more reasonably represented, the influence of the nonlinear relationship between roadbed filler strain and deformation moduluson roadbed stress-strain calculation is reflected, and the refinement degree of ballastless track roadbed structure design is improved.
本发明涉及一种高速铁路无砟轨道路基结构设计方法，提出无砟轨道荷载分布的简化模型；建立粗颗粒路基填料动模量‑应变关系模型；将支承层、基床表层、基床底层采用Odemark法的模量与厚度当量假定进行均一化处理，采用布辛内斯克Boussinesq公式从支承层开始计算路基应力与应变；考虑路基填料应变与变形模量的非线性关系，构建基于迭代计算的路基结构设计方法；基于路基面动变形与基床底层动应变控制准则，优化路基结构。本发明的设计方法针对无砟轨道路基结构，能够更合理的表征路基荷载分布规律，反映路基填料应变与变形模量非线性关系对路基应力应变计算的影响，提高无砟轨道路基基床结构设计的精细化程度。
Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method
The invention relates to a design method of a ballastless track roadbed structure of a high-speed railway. The method comprises the following steps of providing aA simplified model of ballastless track load distribution is provided; establishing a dynamic modulus-strain relationship model of the coarse-particle roadbed filler; carrying out homogenization treatment on the supporting layer, the subgrade surface layer and the subgrade bottom layer by adopting modulus and thickness equivalent assumption of an Odemark method, and calculating subgrade stress and strain from the supporting layer by adopting a Buchner Boussinesq formula; considering a nonlinear relationship between roadbed filler strain and deformation modulus, and constructing a roadbed structure design method based on iterativecomputation; and optimizing a roadbed structure based on roadbed surface dynamic deformation and a roadbed bottom layer dynamic strain control criterion. According to the design method, fFor the ballastless track roadbed structure, the roadbed load distribution rule can be more reasonably represented, the influence of the nonlinear relationship between roadbed filler strain and deformation moduluson roadbed stress-strain calculation is reflected, and the refinement degree of ballastless track roadbed structure design is improved.
本发明涉及一种高速铁路无砟轨道路基结构设计方法，提出无砟轨道荷载分布的简化模型；建立粗颗粒路基填料动模量‑应变关系模型；将支承层、基床表层、基床底层采用Odemark法的模量与厚度当量假定进行均一化处理，采用布辛内斯克Boussinesq公式从支承层开始计算路基应力与应变；考虑路基填料应变与变形模量的非线性关系，构建基于迭代计算的路基结构设计方法；基于路基面动变形与基床底层动应变控制准则，优化路基结构。本发明的设计方法针对无砟轨道路基结构，能够更合理的表征路基荷载分布规律，反映路基填料应变与变形模量非线性关系对路基应力应变计算的影响，提高无砟轨道路基基床结构设计的精细化程度。
Design method of ballastless track roadbed structure of high-speed railwayHigh-speed railway ballastless track roadbed structure design method
高速铁路无砟轨道路基结构设计方法
YE YANGSHENG (author) / CAI DEGOU (author) / ZHANG QIANLI (author) / HAN ZILI (author) / WEI SHAOWEI (author) / YAN HONGYE (author) / YAO JUNKAI (author) / CHEN FENG (author) / YAO JIANPING (author)
2020-06-26
Patent
Electronic Resource
Chinese
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