关于土质路基上的有碴轨道,采用日本铁道技术研究所轨道研究室佐藤吉彦主任研究员提出的新轨道破坏理论。用这种理论,根据给出的轨道、车辆各特性值,能分别计算出道床、路基的下沉量,合计这些数值,可得出轨道全部下沉量。但是,关于所说的道床下沉公式和路基下沉公式中的下沉系数B、k以及在这些理论式中所采用的各特性值,在现阶段, As for the ballast track on soil subgrade, the theory of new orbital failure proposed by researcher Yoshihiro Sato, orbital laboratory of Japan Railway Institute of Technology was used. With this theory, according to the given orbit, the vehicle characteristics, can calculate the subsidence of the roadbed, subgrade, totaling these values, we can get the total amount of subsidence orbit. However, with respect to the subsidence coefficients B, k in the ballast bed subsidence formula and the subgrade subsidence formula and the respective characteristic values ​​used in these theoretical formulas, at this stage,