Railway train excited vibration ground vibration reduction method and row pile

By employing variational mode decomposition and multi-layer material pile design, vibration reduction was achieved across the entire frequency band of train-excited vibrations, thus solving the problems of high-frequency and low-frequency vibrations during the construction of the railway-crossing swing bridge and effectively controlling the stability and noise of the bridge structure.

CN122344902APending Publication Date: 2026-07-07CHINA RAILWAY NO 10 ENG GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY NO 10 ENG GRP CO LTD
Filing Date
2026-06-02
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively reduce high-frequency and low-frequency vibrations caused by train excitation during the construction of railway swing bridges. In particular, high-frequency vibrations have a significant impact on bridge stability and noise, and traditional pile-type vibration reduction methods are not effective at close range.

Method used

The vibration signal is split using variational mode decomposition technology. The pile area and spacing are designed according to Rayleigh wavelength. Combined with the multi-layer material pile design, including HDPE sleeve, RCM cladding and phase change material, a multi-level energy dissipation system is formed to reduce vibration in different frequency bands.

Benefits of technology

It achieves full-frequency vibration reduction of train-induced vibration, significantly reduces the impact of high-frequency and low-frequency vibrations on the swing bridge, reduces bridge damage and noise, and improves construction stability.

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Abstract

The present application belongs to the technical field of subgrade vibration reduction, and relates to a method for reducing vibration of a subgrade excited by a train and a row pile. The method for reducing vibration of the subgrade excited by the train performs variational modal decomposition or multi-source variational modal decomposition on a vibration source signal, splits the vibration source signal into multiple vibration modal components, respectively calculates Rayleigh wavelengths of the multiple vibration modal components according to central frequencies of the multiple vibration modal components, divides a region between a railway and a bridge foundation of a rotary bridge into multiple row pile regions, each of the multiple row pile regions corresponds to a Rayleigh wavelength of a decomposition modal, and designs row pile spacings and row pile lengths of the multiple row pile regions according to the Rayleigh wavelengths. The row pile has a rigid core column inside, a HDPE sleeve pipe is sleeved on a periphery of the core column, an RCM coating layer is processed on an outer layer of the HDPE sleeve pipe, a phase change material is filled in a cavity between the HDPE sleeve pipe and the core column to form a phase change composite layer, and end covers are detachably installed at both ends of the core column. The present application makes a vibration reduction effect comprehensively cover more frequency bands, and the row pile achieves a multi-level energy dissipation effect.
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