Abstract：Research purposes:The current ballastless track structure design method does not specifically mention in the concept of controlling indicators，disadvantageous position and critical loading position. This paper selects static characteristics indicators of slab ballastless track structure based on the CRTS III high-speed railway. Simultaneously， it calculates the stress of BTS，getting BTS’s critical loading position and the most disadvantageous position.
Research conclusions:The results show:(1)The critical loading position of CRTS III ballstless track structure is slab end position:(2)The maximum transverse tensile stress is larger than the maximum longitudinal tensile stress in the bottom of track slab，the disadvantageous position is slab corner:(3)The maximum compressive stress of packed bed happens under the load:(4)The maximum longitudinal tensile stress is larger than the maximum transverse tensile stress on the support layer of ballstless track structure on the subgrade，the disadvantageous position is the load position， the longitudinal tensile stress does not happen on the base plate of ballstless track structure on the bridge，the transverse tensile stress happens on the longitudinal edge of support layer:(5)The research can provide reference for China getting the independent intellectual property rights and the international advanced design of ballastless track and method theory.
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2013, Vol. 30 
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