A DEGRADATION MECHANISM OF CLAYEY ROADBEDS UNDER BALLASTLESS-TRACK AND ITS COUNTERMEASURES

概要

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Recently, ballast-less tracks with cement grouted into ballast have been constructed on a full-scale operation. This method is very effective to reduce the frequency of track maintenance. Where roadbed constituents however are of clay, outflow of roadbed soils or even voids in the roadbed are likely to occur after heavy rainfalls. Since the process of such roadbed failures due to interactions between trainloads and roadbeds under ballast-less tracks has not been clarified, reasonable countermeasures have not been developed as of yet. Authors carried out tests with a substantial scale model of ballast-less track set on a saturated clayey roadbed. As a result, the mechanism of the clayey roadbed defects under ballast-less tracks has been clarified. In addition, authors have confirmed the improved effect of two countermeasures against roadbed failures by tests with substantial scale models.
社団法人　土木学会の論文