Vibration reduction and deformation self-regulation composite track structure for high railway bridge transition section in alpine region

Abstract

The invention discloses a vibration reduction and deformation self-regulation composite track structure for a high railway bridge transition section in an alpine region, and belongs to the technical field of road bridge engineering. A track is connected with a track plate, a concrete bottom plate is arranged at the lower end of the track plate, a track plate groove is formed in the lower surface of the track plate, the top face of the track plate groove is an arc face and is provided with an in-plate anti-vibration pad, a force transmission plate groove corresponding to the track plate groove is formed in the upper surface of the concrete bottom plate, a jacking mechanism groove is formed in the bottom face of the force transmission plate groove, a vibration reduction mechanism is arranged between the track plate and the concrete bottom plate, the upper end of the vibration reduction mechanism makes contact with the in-plate anti-vibration pad, the lower end of the vibration reduction mechanism is connected with a hydraulic automatic jacking mechanism, and the hydraulic automatic jacking mechanism is arranged in the jacking mechanism groove. According to the invention, the smoothness of the track structure is ensured, the structural vibration and environmental noise of the transition section are reduced, the safety and comfort of a train running to the transition section are improved, and a method for adjusting the smoothness of the track is simple, high in adaptability, large in adjusting range and convenient to apply and popularize.

Description

technical field [0001] The invention relates to a vibration-reducing and deformation self-regulating composite track structure of a high-speed railway bridge transition section in an alpine region, belonging to the technical field of road and bridge engineering. Background technique [0002] With the development of the country's economy, my country's railway industry has also developed rapidly. Nowadays, my country's railways are mainly high-speed railways. High-speed railways have very strict requirements on the deformation control of uneven settlement. Among them, ballastless tracks require post-construction settlement not exceeding 15mm, and the settlement difference of the transition section cannot exceed 5mm. However, in high-speed railways Under the action of the train load, the problem of differential settlement caused by the huge stiffness difference between the bridge and the subgrade at the transitional section of the road bridge and the structural difference betwee...

AI Technical Summary

Problems solved by technology

[0009] In addition to the smoothness control of the track structure, there are currently few reports on engineering measures to improve track smoothness from the perspective of vibration reduction and isolation technology in the field of road-bridge transition sections in alpine regions. Structural vibrations caused by track irregularities will be significantly amplified due to the amplification of the wheel-rail force. On the other hand, considering the impact load of the train in the transition section is a long-term effect, the vibration reduction and isolation of the track structure should be considered in the transition section of the alpine region is very necessary

[0010] Based on the actual needs of high-speed rail projects in alpine regions to be developed in my country and the engineering problems of high precision and difficulty in differential settlement control of ballastless track road-bridge transition sections, we have invented a deformation that is suitable for high-speed railway bridge transition sections in alpine regions. The track structure with automatic regulation and vibration reduction is dedicated to providing a new idea for the active control of track comfort in the transition section of high-speed railway bridges in alpine regions

Images