Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway

The characteristics of the vibrations induced by the passage of a high-speed train do not only depend on the train speed, axle load, and track irregularity but also depend on the properties of the foundation soil and the surrounding topography. Estimating the vibration characteristics in different t...

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Main Authors: Wujian Yan, Haizhong Zheng, Zhijian Wu, Tong Wan, Xinxin Tian
Format: Article
Language:English
Published: Wiley 2020-01-01
Series:Shock and Vibration
Online Access:http://dx.doi.org/10.1155/2020/4529842
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author Wujian Yan
Haizhong Zheng
Zhijian Wu
Tong Wan
Xinxin Tian
author_facet Wujian Yan
Haizhong Zheng
Zhijian Wu
Tong Wan
Xinxin Tian
author_sort Wujian Yan
collection DOAJ
description The characteristics of the vibrations induced by the passage of a high-speed train do not only depend on the train speed, axle load, and track irregularity but also depend on the properties of the foundation soil and the surrounding topography. Estimating the vibration characteristics in different terrains is therefore essential. This study investigates the characteristics of propagation and attenuation of the vibrations induced by high-speed trains in loess-terraced slopes. The influence of the soil mechanical properties on the propagation of vibrations is analyzed through a numerical simulation. Field experiments are conducted to measure the vibration induced by a high-speed train at a loess-terraced slope site in Qin’an, Gansu, China. The measured acceleration time history is analyzed in the time domain and frequency domain. The results show that, at the edge of each terrace level, the vibration in the Y direction is the strongest, followed by those in the X and Z directions. The peak ground acceleration values are amplified in all three directions at the fourth terrace level. A model describing the vehicle-roadbed-foundation-terraced slope system is established to study the influence of the elastic modulus of the soil on the vibration characteristics. A change in the elastic modulus of the foundation soil is found to have an evident influence on the horizontal and vertical vibrations in each terrace level. However, a change in the elastic modulus of the soil in a terrace only affects the vibration in that terrace and in the adjacent ones, whereas it has no effect on the vibrations in terraces located farther away. This study can provide some reference values for slope reinforcement along railways.
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series Shock and Vibration
spelling doaj-art-bb3b3ff36e6146129afe9baa1ec90ff22025-02-03T01:03:56ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/45298424529842Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed RailwayWujian Yan0Haizhong Zheng1Zhijian Wu2Tong Wan3Xinxin Tian4Key Laboratory of Loess Earthquake Engineering, China Earthquake Administration, 450 Donggang West Road, Lanzhou 730000, ChinaKey Laboratory of Loess Earthquake Engineering, China Earthquake Administration, 450 Donggang West Road, Lanzhou 730000, ChinaSchool of Transportation Engineering, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211800, ChinaSchool of Civil Engineering, Guangzhou University, Waihuan West Road, Guangzhou 510006, ChinaKey Laboratory of Loess Earthquake Engineering, China Earthquake Administration, 450 Donggang West Road, Lanzhou 730000, ChinaThe characteristics of the vibrations induced by the passage of a high-speed train do not only depend on the train speed, axle load, and track irregularity but also depend on the properties of the foundation soil and the surrounding topography. Estimating the vibration characteristics in different terrains is therefore essential. This study investigates the characteristics of propagation and attenuation of the vibrations induced by high-speed trains in loess-terraced slopes. The influence of the soil mechanical properties on the propagation of vibrations is analyzed through a numerical simulation. Field experiments are conducted to measure the vibration induced by a high-speed train at a loess-terraced slope site in Qin’an, Gansu, China. The measured acceleration time history is analyzed in the time domain and frequency domain. The results show that, at the edge of each terrace level, the vibration in the Y direction is the strongest, followed by those in the X and Z directions. The peak ground acceleration values are amplified in all three directions at the fourth terrace level. A model describing the vehicle-roadbed-foundation-terraced slope system is established to study the influence of the elastic modulus of the soil on the vibration characteristics. A change in the elastic modulus of the foundation soil is found to have an evident influence on the horizontal and vertical vibrations in each terrace level. However, a change in the elastic modulus of the soil in a terrace only affects the vibration in that terrace and in the adjacent ones, whereas it has no effect on the vibrations in terraces located farther away. This study can provide some reference values for slope reinforcement along railways.http://dx.doi.org/10.1155/2020/4529842
spellingShingle Wujian Yan
Haizhong Zheng
Zhijian Wu
Tong Wan
Xinxin Tian
Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway
Shock and Vibration
title Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway
title_full Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway
title_fullStr Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway
title_full_unstemmed Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway
title_short Experimental Study and Numerical Analysis on the Vibration Characteristics of a Terraced Slope along an Embankment Section of a High-Speed Railway
title_sort experimental study and numerical analysis on the vibration characteristics of a terraced slope along an embankment section of a high speed railway
url http://dx.doi.org/10.1155/2020/4529842
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