CA mortar layer located between the slab and the damping pad of the vibration damping ballastless track in the subway functions for supporting, load transfer and adjustment. Due to the presence of the damping pad, CA mortar layer is prone to failure and it is necessary to study carefully the influence of track parameters on the stress of CA mortar. Based on the elastic foundation beam-solid model, this paper analyses the influence of track parameters such as the concrete grade of slab, the elastic modulus of CA mortar, the stiffness of damping pad and the length of slab on the stress of CA mortar, and identifies reasonable matching track parameters through stress matching map. The research concludes that the elastic modulus of CA mortar is the most sensitive parameter of the stress of CA mortar. The impact of the track parameters, such as the concrete grade of slab, the elastic modulus of CA mortar, the stiffness of damping pad and the length of slab on the maximum tensile stress of CA mortar is much larger than the maximum compressive stress of CA mortar. Based on stress matching map, the paper offers the reasonable matching track parameters:the concrete grade of slab is C80 , the elastic modulus of CA mortar is 3 000 MPa, the stiffness of damping pad is 0. 04 N/mm3 and the length of slab is 4. 097 m.
国家科技期刊平台
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维普
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