Vibration isolation device for the bed plate end of the floating track

Abstract

The invention belongs to the field of vibration control and relates to a slab end isolation mounting device for supporting a floating slab in a floating track bed. The slab end isolation mounting device comprises a top slab, a bottom slab, an elastic element and a damping element, wherein the elastic element and the damping element are arranged between the top slab and the bottom slab. The slab end isolation mounting device is characterized in that the top slab is provided with a slab end horizontal limiting device; the slab end horizontal limiting device comprises a slab end transverse limiting device or / and a slab end lengthwise limiting device. The slab end isolation mounting device and a prefabricated short slab in the length of 1.2-8m form the structure of the floating track bed together, the prefabricated production and lifting construction of the floating slab are possible, and the prefabricated short slab is limited lengthwise and transversely through the slab end horizontal limiting device, so that the stability and safety of the structure of the floating track bed in the travelling process are guaranteed, the construction speed is greatly improved, the construction period is further shortened, the construction difficulty is reduced, and the production cost is saved. The isolation mounting device is high in practicability, safe, reliable and high in cost performance and has a wide market application prospect.

Description

technical field [0001] The invention belongs to the field of vibration control, and relates to a vibration isolation device for a railway floating track bed, in particular to a plate end vibration isolation device for supporting a floating plate in the floating track bed. Background technique [0002] Vibration and noise are recognized as the most widely affected public hazards, and they are also a problem that needs to be solved urgently in the development of rail transit in recent years. Among the existing rail transit vibration and noise reduction technologies, the most successful practical application is the component floating technology, typically the floating ballast bed technology, which has high vibration isolation efficiency and stable working performance, which has become a consensus in the industry, such as patent No. The Chinese patent ZL200410035441.1 discloses a typical built-in floating ballast bed structure and a corresponding vibration isolation device. How...

AI Technical Summary

Problems solved by technology

However, a traditional floating slab with a length of 25m weighs more than 70 tons. The carrying capacity of the hoisting and transporting tools in the existing tunnel is only 10 tons. The difference is too large, and the overall prefabrication cannot be transported; In curved areas, it is difficult for prefabricated long slabs to adapt to changing curve elements, so prefabricated slab technology has not been able to be applied in the construction of multi-point supported floating track bed projects such as steel spring floating slabs

In theory, although there is a feasible solution to change long floating slabs to short floating slabs, changing long slabs to short slabs will bring a series of problems in dynamics, safety and installation. For example, the application of existing elastic vibration isolation After the length of the slab is shortened, the horizontal position and stability requirements of the floating slab cannot be met. In addition, the sinking of the floating slab is too large when the train passes by, and the force on the rail is too large, and there will be a seesaw effect, which seriously affects the safety of the train. Safety, etc., so the technical solution of changing the long floating plate to the short floating plate has not been applied in the project

How to further increase the construction speed has become an industry problem that restricts the further promotion and application of floating ballast bed technology

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