Large-span rail-mounted platform lorry with prestressed structure

The invention relates to the field of engineering construction, and discloses a large-span rail-mounted platform lorry of a prestress structure. The platform lorry comprises a rail-mounted platform lorry body and a prestress device. The rail-mounted platform lorry body comprises a platform lorry and platform lorry steel support legs arranged at two ends of the platform lorry and used for driving the platform lorry to walk; and the prestress device comprises a prestress steel strand transversely arranged below the platform lorry, one end of the prestress steel strand is fixed to one side of theplatform lorry, the other end of the prestress steel strand is fixed to the other side of the platform lorry, and the prestress steel strand is in a tensioned state. Running safety and stability of the rail-mounted platform lorry can be effectively improved. 本发明公开了一种预应力结构的大跨度轨道式平板车，涉及工程建设领域，包括轨道式平板车本体和预应力装置，所述轨道式平板车本体包括平板车，以及设于平板车两端用于带动平板车行走的平板车钢支腿；所述预应力装置包括横向设置于平板车下方的预应力钢绞线，所述预应力钢绞线的一端固定于平板车的一侧，另一端固定于平板车的另一侧，且所述预应力钢绞线呈紧