Development of New Solid-bed Track Equipped with Resilient Sleepers Using the Shear-key to Achieve Efficient Construction Work

摘要

We developed a new solid-bed track equipped with resilient sleepers (STR) using the shear-key on each side of the sleepers to resist lateral load, to achieve the efficient construction work. As a result of full-scale track model tests, we confirmed that the STR has sufficient performance. The STR was actually adopted in the construction, and it was confirmed that the construction cost of the concrete trackbed could be cut by 60 %, compared with the existing one, reducing the overall construction cost by 20 %. Furthermore, the narrower concrete trackbed makes track laying 1.7 times faster, reducing the construction time.