High-speed railway subgrade considering vibration reduction and freezing prevention

Abstract

The high-speed railroad bed comprises a railroad bed body, a gravel layer is fixedly connected to the end, away from the ground, of the railroad bed body, a roadbed body is fixedly connected to the end, away from the railroad bed body, of the gravel layer, and a heat preservation layer is fixedly connected to the end, away from the gravel layer, of the roadbed body; the end, away from the roadbedbody, of the heat preservation layer is fixedly connected with a protective layer, and the end, away from the heat preservation layer, of the protective layer is fixedly connected with a shock pad. The high-speed railway subgrade has the advantages that the top ends of the subgrade body, the fixing layer, the damping material layer and the reinforcing layer are sealed by the heat preservation layer, so that the subgrade body is isolated from the outside by the heat preservation layer, and temperature conduction above the subgrade body and the heat preservation layer is isolated; therefore, theheat exchange capacity between the roadbed body and the outside is reduced, the anti-freezing capacity of the railroad bed can be effectively improved, and the protective performance of the railroadbed is improved.

Description

technical field [0001] The invention relates to the technical field of railway embankment engineering, in particular to a high-speed railway embankment which takes into account vibration reduction and antifreeze. Background technique [0002] The railway subgrade is a structure that bears and transmits the gravity of the track and the dynamic action of the train. It is the foundation of the track and an important building to ensure the operation of the train. The subgrade is a kind of earth-stone structure, which is in various topographical, geological, hydrological and climatic environments, and sometimes suffers from various disasters, such as floods, mudslides, collapses, earthquakes, etc. With the development of the national economy, my country's railway industry is nearly It has also developed rapidly in the past ten years, including about 45,000 kilometers of high-speed railways, and the operating mileage of high-speed railways in seasonally frozen regions will reach 10...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing high-speed railway subgrade has a poor thermal insulation effect on the subgrade. When the temperature is low, the subgrade is prone to cracks and deformation, which affects the stability of the railway;

[0004] 2. The existing high-speed railway roadbed is affected by the vibration generated by the train during the long-term use, and the roadbed is prone to damage, which is easy to trigger accidents such as landslides, sideslips, and collapses, and the stability is low

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