Reinforced damping railway embankment structure

Abstract

The invention provides a reinforced damping railway embankment structure, and belongs to the technical field of railway environmental vibration control. The reinforced damping railway embankment structure comprises a multi-layer reinforced layer, embankment filling, a roadbed and a ballast bed. Combined with railway subgrade construction, the multi-layer reinforced layer is arranged in a subgradestructure, the strength of the embankment structure is effectively enhanced, and the uneven settlement and deformation of the roadbed are alleviated. At the same time, the multi-scattering phenomenonof a vibration wave is used for enabling the vibration wave to reflect back and forth between the reinforcement layers to consume energy, a damping material is used for transforming the vibration waveinto heat energy to absorb energy; furthermore, the reinforced damping railway embankment structure is tightly connected with a CFG pile, the vibration wave can be transmitted to the depth of the foundation, the vibration response caused by train operation is subjected to vibration-reducing and vibration-isolating treatment. The reinforced damping railway embankment structure is applicable to thevibration sensitive areas along rail transit lines which are newly built or subjected to expanding and rebuilding capability, especially for the situation that when a railway passes through dense buildings and the line sections which are close to the building.

Description

technical field [0001] The invention belongs to the technical field of railway environment vibration control, and in particular relates to a railway embankment structure embedded with an energy-dissipating reinforcement layer. It is suitable for vibration-sensitive areas along the rail transit line for new construction or capacity expansion, especially for the line section where the railway passes through dense building groups and is close to the building. Background technique [0002] With the rapid development of railway traffic, the environmental vibration problem induced by it has become increasingly prominent. The long-term repeated vibration has affected the safety of adjacent buildings, the normal use of precision instruments, and the work and life of residents along the line. Therefore, it is necessary to take appropriate vibration reduction measures to reduce the impact of vibration caused by train operation on the surrounding environment and achieve sustainable dev...

AI Technical Summary

Problems solved by technology

Vibration control from the vibration source, such as using heavy-duty steel rails and seamless railways, and setting vibration-absorbing fasteners, but the vibration isolation frequency band is mainly for high-frequency vibrations, and the cost of raw materials and transportation is high, which is uneconomical

For the line section where the railway passes through dense building groups or is close to the building, due to the limitation of the construction site, it is difficult to implement vibration isolation measures such as empty trenches, filled trenches and row piles to control the vibration from the transmission path

In the design of the existing railway subgrade structure, the vibration damage of the subgrade structure under the long-term repeated load of the train is not considered. Especially, the soft soil subgrade is prone to liquefaction under long-term repeated loads, which reduces the strength of the subgrade, resulting in deformation of the subgrade structure, affecting The comfort of the train may even affect the safe operation of the train; at the same time, the conventionally designed embankment-type high-speed railway soft soil subgrade usually uses CFG piles (Cement Fly-ash Grave, cement fly-ash gravel piles) for foundation treatment, Enhanced the strength of the subgrade and has a certain vibration isolation effect, but it is still not ideal

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