Research purposes:The regulation of all-day temperature variation on general-slab and frame-slab is presented through temperaturemeasurementofballastless track slab. The regulation of all-day temperature gradientof slab is given. The temperature effecton the slab is analyzed and researched for purpose of instructing the design.
Research conclusions:Throughmeasuremen,t themaximum temperatures of the upper surface and the lower surface of slabs are respectively 16eand 3ehigher than the localmaximum temperature. The temperature difference in the top-bottom surfaces of slab is between 10eand 13e. The temperature gradientof the slab profile is approximately 0. 5e/cm, approaching the linearvariation. A calculationmodelof thermalwarping stress ofslab is established. Upon calculation, thewarping stresses andwarping deformations ofgeneral-slab are smaller than those of frame-slab, and thewarping deformations of general-slab and frame-slab are 0. 82 mm and 0. 61 mm respectively. The maximum longitudinalwarping stresses of general-slab and frame-slab are respectively 1. 81 MPa and 1. 51 MPa, and the maximum transversewarping stresses ofgeneral-slab and frame-slab are 0. 75MPa and 0. 58MPa respectively.
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