The invention provides a longitudinal connecting plate type ballastless track refined bar planting modeling and renovation method and
system, and the method comprises the steps: building a plate type ballastless track-bar planting geometric model, setting a track structure interlayer relation and a track-pin action relation, inputting a
temperature load, setting a boundary condition, and calculating a ballastless track temperature effect. Performing
deep mining analysis on model calculation data, evaluating the influence of the
temperature load on the
disease degree, predicting the possible
disease development trend in the future, and establishing a
disease prediction model; based on a
deep mining analysis result, an improvement
countermeasure is intelligently adjusted, an improvement scheme is determined, construction preparation, on-site construction, real-time monitoring and improvement effect evaluation are performed according to the improvement scheme, the construction quality and safety are ensured, and the improvement scheme is adjusted and optimized. According to the method, the accurate three-dimensional finite
element model is constructed, the reasonable
temperature load is applied, and the common embedded
steel bar disease factors are introduced, so that the accurate prediction of the upward arch deformation of the track structure is realized.