Roadbed slab frequency modulation and vibration reduction device and floating ballast bed

The utility model relates to the technical field of rail transit vibration isolation. The roadbed slab comprises a fixing support and a weight box, the fixing support comprises a base plate and a U-shaped connecting assembly, the two ends of the base plate are connected with steel spring roadbed slabs respectively, the U-shaped connecting assembly is located below the base plate and connected withthe base plate, and the weight box is placed on the U-shaped connecting assembly. According to the roadbed slab and the roadbed slab frequency modulation and vibration reduction device thereof, the amplitude of the steel spring floating slab in an inherent frequency range can be effectively reduced, vibration energy in a characteristic frequency range is consumed, a better vibration isolation effect is achieved, and meanwhile noise in a vehicle in a steel spring floating slab section is reduced. 本实用新型涉及轨道交通隔振技术领域，公开了一种道床板及其道床板调频减振装置，其包括固定支架以及配重箱，所述固定支架包括两端分别与钢弹簧道床板连接的基板，以及位于所述基板下方并与所述基板连接的U形连接组件，所述配重箱放置在所述U形连接组件上。本实用