Trackless maintenance car for simply supported girder bridge of high-speed rail

The invention discloses a trackless maintenance car for a simply supported girder bridge of a high-speed rail, and relates to the technical field of maintenance cars for simply supported girder bridges of high-speed rails, the trackless maintenance car comprises a concrete beam, both sides of the concrete beam are provided with walking pendants, and the bottoms of the walking pendants are provided with trackless walking system assemblys.The trackless maintenance car has the beneficial effects that conventional rail arrangement is effectively simplified; the load of the track weight on the beam body is greatly reduced, meanwhile, aiming at the continuous beam body with dense holes, the maintenance car can be rotated by a certain angle or folded, passes through the bridge pier and then is unfolded, so that one maintenance car does not need to be arranged in each bridge opening, the configuration number of the maintenance cars is effectively reduced, namely, the budget cost is reduced, and the maintenance effici