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路基不均匀沉降分为正(余)弦型、错台型和折角型,对无砟轨道的影响主要考虑线路纵向正(余)弦型不平顺。应用有限元法计算路基不均匀沉降对轨道结构的影响,采用弹性地基上的梁板计算模型和叠合梁计算模型计算基础变形的无砟轨道荷载弯矩,并进行比较分析,两种模型的计算结果吻合较好。路基不均匀沉降对双块式无砟轨道结构的受力影响较大,建议对双块式无砟轨道变形特别是因线下工程沉降引起的永久变形制定控制标准,设计和检算考虑路基不均匀沉降对轨道结构的影响。
Uneven subgrade subsidence is divided into positive (residual) chord type, the wrong typhoon type and angle, the main impact on the ballastless track longitudinal (Yu) chord type irregular. The application of finite element method to calculate the influence of subgrade uneven subgrade settlement on the track structure. Based on the calculation method of beam plate and composite beam on elastic foundation, the load moment of ballastless track under basic deformation is calculated and compared. The calculated results agree well. Subgrade uneven subsidence has a great influence on the force of the double-block ballastless track structure. It is suggested that the control standard should be set for the deformation of the double-block ballastless track, especially for the permanent deformation caused by the subsidence of the line project. Influence of uniform settlement on track structure.