Behavior and Control of the Ballastless Track‐Subgrade Vibration Induced by High‐Speed Trains Moving on the Subgrade Bed with Mud Pumping

Huang, Junjie; Su, Qian; Liu, Ting; Wang, Wei

doi:10.1155/2019/9838952

Cited by 15 publications

(17 citation statements)

References 54 publications

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“…During the test, the signals of all the sensors have been acquired via a dynamic acquisition system and transformed to the vibration acceleration. Further details about the field test can be found in [32].…”

Section: Validation Of Numericalmentioning

confidence: 99%

Characterization of Vertical Response of Asphalt Trackbed Concrete in Railway Substructure to External Loads

Yusupov

Qiu

Sharipov

et al. 2020

Advances in Materials Science and Engineering

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Optimizing the dynamic responses of a slab track system is a key aspect to improve the quality of a railway track structure. In this paper, numerical modelling and simulation of vertical dynamics of the railway track structure engaging the asphalt concrete in substructures were carried out. us, a 3D finite element (FE) model was developed. e developed model was validated by comparing its outputs, that is, acceleration with the measured ones from realistic experimental data. e good agreement between the simulated and measured data which resulted from the validation confirmed that the proposed model has a capability of simulating the complex dynamic performances of the train-track-ground system under different loading conditions. Analyses of the determined results from the simulation model performances revealed that three specific factors, which were the speed of the train, the temperature, and thickness of the asphalt concrete trackbed, mainly influenced the dynamic behavior of the railway structure. ereby, those factors were taken into consideration while evaluating the dynamic responses and designing the asphalt concrete trackbed in railway substructures.

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Section: Validation Of Numericalmentioning

confidence: 99%

Characterization of Vertical Response of Asphalt Trackbed Concrete in Railway Substructure to External Loads

Yusupov

Qiu

Sharipov

et al. 2020

Advances in Materials Science and Engineering

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“…To investigate how track slab damages initiate and how they affect vehicle-track system dynamics and track irregularities, previous studies carried out numerical simulations [3][4][5][6][7][8][10][11][12][13][14][15][16], full-scale tests [9,[17][18][19], and field tests [15,20,21]. These studies shed some light on repair works for defects, slab maintenance, and life-cycle management of slab track.…”

Section: Introductionmentioning

confidence: 99%

“…A straightforward method of damage detection for slab track is regular visual inspection or non-destructive testing (NDT) methods [20][21][22][23][24][25][26][27][28]. The NDT techniques are powerful in damage detection for concrete structures, especially in structural health monitoring of bridges [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…The NDT techniques are powerful in damage detection for concrete structures, especially in structural health monitoring of bridges [29][30][31]. The NDT techniques adopted in ballastless railway detection mainly includes impact-echo method [21,23,24], ground-penetrating radar (GPR) [21], digital image correlation (DIC) [25,26] and synthetic aperture focusing technique (SAFT) ultrasound imaging method [27,28]. They can detect specific slab defects and report the size and even geometry of defects through customized devices.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Temperature-Induced Deformation for HSR Slab Track Using Track Geometry Measurement Data

Liu

2019

Sensors

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Slab track is widely used in many newly built high-speed rail (HSR) lines as it offers many advantages over ballasted tracks. However, in actual operation, slab tracks are subjected to operational and environmental factors, and structural damages are frequently reported. One of the most critical problems is temperature-induced slab-warping deformation (SWD) which can jeopardize the safety of train operation. This paper proposes an automatic slab deformation detection method in light of the track geometry measurement data, which are collected by high-speed track geometry car (HSTGC). The characteristic of track vertical irregularity is first analyzed in both time and frequency domain, and the feature of slab-warping phenomenon is observed. To quantify the severity of SWD, a slab-warping index (SWI) is established based on warping-sensitive feature extraction using discrete wavelet transform (DWT). The performance of the proposed algorithm is verified against visual inspection recorded on four sections of China HSR line, which are constructed with the China Railway Track System II (CRTSII) slab track. The results show that among the 24,806 slabs being assessed, over 94% of the slabs with warping deformation can be successfully identified by the proposed detection method. This study is expected to provide guidance for efficiently detecting and locating slab track defects, taking advantage of the massive track inspection data.

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“…Mud pumping has occurred in several spots in Chinese high-speed railways in recent years [6][7][8]. Several scholars have studied the main parameters that induced the defect of mud pumping under slab tracks [9][10][11]. eir studies show that when the sealing material of slab tracks has some cracks, the rainwater could penetrate into the subgrade surface easily.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Vibration Responses in High‐Speed Railways considering Mud Pumping Defect

Shao

et al. 2019

Shock and Vibration

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As a newly appeared defect under slab tracks in high-speed railways, mud pumping weakens the support ability of the subgrade to slab track, bringing about deviations on the vibration responses of the vehicle, slab track, and subgrade. Therefore, this paper proposes a vehicle-slab track-subgrade coupled model based on the multibody simulation principle and the finite element theory to highlight the influences of mud pumping defect. As an external excitation to this model, random track irregularity is considered. In order to simulate the mud pumping defect, the contact between the concrete base and subgrade is described as a spring-damper system. This model is validated by field test results and other simulation results, and a very good agreement is found. The vibration responses of the vehicle, slab track, and subgrade under different mud pumping lengths and train speeds are studied firstly. The deviations of vibration responses in high-speed railways induced by mud pumping are then obtained, and the limited mud pumping length is put forward finally to provide a recommendation for maintenance works of high-speed railways in practice.

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Behavior and Control of the Ballastless Track‐Subgrade Vibration Induced by High‐Speed Trains Moving on the Subgrade Bed with Mud Pumping

Cited by 15 publications

References 54 publications

Characterization of Vertical Response of Asphalt Trackbed Concrete in Railway Substructure to External Loads

Characterization of Vertical Response of Asphalt Trackbed Concrete in Railway Substructure to External Loads

Identification of Temperature-Induced Deformation for HSR Slab Track Using Track Geometry Measurement Data

Numerical Analysis of Vibration Responses in High‐Speed Railways considering Mud Pumping Defect

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