Experimental Study On Temperature Field Characteristic Of Crts â…  Twin-Block Ballastless Track

Ballastless track is a composite structure made of reinforced concrete material, and within the scope of its life cycle, it withstands the change of temperature changes. In the actions of multiple factors, such as the meteorological factors and the thermal conductivity properties of track structure, the track formate it temperature field, and the change of surrounding environmental conditions affects the temperature field and stress of track structure. Based on the analysis of the temperature field characteristics of CRTS I twin-block ballastless track structure and the relative meteorological affecting factors, this paper mainly includes the following contents and conclusions:(1) Based on summarizing the relative references at home and abroad, clearitified the formation of temperature field of track structure and therelative effections of meteorological factors.(2) Having analyzed the affecting actions of meteorological factors, designing the testing experiments of ballastless track structure temperature field, monitoring the temperature of track structure and the surrounding meteorological factors, providing the experimental basis for analyzing the temperature field distribution law of track structure and effections of temperature of track structure affected by meteorological factors.(3) Having analyzed the relationship between the meteorological factors and facial temperature of track structures, put forward a method of calculating the surface heat transfer coefficient of track slab, primarily put forward the formula of calculating the maximum facial temperature of track slab in winter.(4) Having analyzed the temperature field, temperature gradient and temperature distribution law of twin-block ballastless track, primarily put forward the formula of predicting the maximum temperature of track slab.