|4. Expansion of the applicable scope of turnout-studded long-rails|
In Japan, each long-rail section is generally equipped with no more than one turnout set, since no methods have yet been established to analyze the axial force of long-rails studded with two or more turnouts. To evaluate the axial force in such cases, the RTRI constituted a finite element model and proposed a method of analysis based on this. The method enables calculation of the lateral resistance required for the ballast and discussion of a method of laying long-rails studded with successive turnouts. The RTRI also performed a measurement test on a long-rail section of ballast track where two turnouts were installed without a break (Fig. 1), confirming the validity of the analysis method.
Fig. 1 A long-rail section installed with two turnouts in succession
Fig. 2 Analysis of rail axial force in a long-rail section studded with successive turnouts
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