Research methods: Five kinds of volume that taken out in slab are selected out and five kins of numerical value of equivalent solid slab are calculated out by a software tool of ANSYS. Then fitting function and Newton interpolation function can be structured, and the numerical value of equivalent solid slab thickness can be solved aften the two functions are contrastive analysed.
Research conclusions: The thickness of solid slib is effected greatly by the size of sleeper, where are embedded is empty, and can be structured by some function.
2007, Vol. 24 
