Ballast track beam expansion device

The utility model belongs to the technical field of bridge expansion devices, and particularly relates to a ballast track beam expansion device. The ballast track beam expansion device is mainly technically characterized by comprising anchor bars, steel sections with clamping grooves and a waterstop with clamping strips at two ends, the clamping strips are clamped in the clamping grooves, the upper end of each clamping groove is provided with a groove, a sealing protruding strip is arranged above each clamping strip and connected with the clamping strip into a whole, and the top end of each sealing protruding strip is clamped in the corresponding groove. In the mounting and replacing process, the sealing protruding strips are easier to push in and more convenient and quicker to mount and replace and can be replaced under the condition of not breaking; the top end of each sealing protruding strip is in face seal with the corresponding clamping groove, and accordingly sealing effect is better.