Portal crane rail foundation structure

The utility model discloses a portal crane rail foundation structure, including lifting by crane rail foundation and empty wagon rail foundation, lift by crane rail foundation by lower supreme A first substrate layer, a backfill layer, expansion basal layer and the subgrade box of including in proper order, empty wagon rail foundation is by lower supreme second stratum basale, the 2nd backfill layer and the 2nd subgrade box of including in proper order. The weight of lifting by crane state and the empty wagon state of advancing according to the portal crane is different, provides intensity different rail foundation and the empty wagon rail foundation of lifting by crane respectively, and the expansion basal layer that wherein lifts by crane among the rail foundation adopts concrete placement to form, bears the weight of the dynamic height, be out of shape and the settling amount little, safe and reliable constructs, and empty wagon rail foundation need not to set up the expansion basal layer, is showing the i