Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line

In order to improve the force condition of ballasted railway subgrade structure and reduce maintenance cost, it is necessary to study the influence of subgrade structure parameters on subgrade dynamic response under train load. Orthogonal test was designed and used to analyze the sensitive relations...

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Auteurs principaux:	WANG Wei, LU Sikui, YANG Chengzhong, FENG Qingsong
Format:	article
Langue:	ZH
Publié:	Editorial Office of Journal of Shanghai Jiao Tong University 2021
Sujets:	ballasted railway dynamic response orthogonal experiment analytic hierarchy process (ahp) Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989
Accès en ligne:	https://doaj.org/article/3941464dbc9642acb7ca37e592db1e77
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id	oai:doaj.org-article:3941464dbc9642acb7ca37e592db1e77
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spelling	oai:doaj.org-article:3941464dbc9642acb7ca37e592db1e772021-11-04T09:35:15ZOptimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line1006-246710.16183/j.cnki.jsjtu.2019.235https://doaj.org/article/3941464dbc9642acb7ca37e592db1e772021-01-01T00:00:00Zhttp://xuebao.sjtu.edu.cn/CN/10.16183/j.cnki.jsjtu.2019.235https://doaj.org/toc/1006-2467In order to improve the force condition of ballasted railway subgrade structure and reduce maintenance cost, it is necessary to study the influence of subgrade structure parameters on subgrade dynamic response under train load. Orthogonal test was designed and used to analyze the sensitive relationship between dynamic response of railway subgrade structure and parameters of each structural layer, and the optimal parameter combination of subgrade structure of ballasted railway was determined by combining analytic hierarchy process (AHP) and linear evaluation index. The parameters include elastic modulus of ballast bed, elastic modulus of surface and bottom layer of subgrade bed, thickness of ballast bed, thickness of surface and bottom layer of subgrade bed, and elastic modulus of foundation. The results show that the thickness of track bed is the main factor that affects dynamic stress of ballast bed, dynamic stress and vibration acceleration of surface layer of subgrade bed. The elastic modulus of foundation is the main factor that affects the vertical displacement of the sleeper. The mechanical optimum parameter combination of ballast track structure parameters is determined as the elastic modulus ballast bed is 250 MPa, elastic moduli of surface and bottom layer of subgrade bed are 120 MPa and 115 MPa, the thickness of ballast bed is 0.35 m, the thickness of surface and bottom layer of subgrade bed are 1.1 m and 2.3 m, and the elastic modulus of foundation is 70 MPa.WANG WeiLU SikuiYANG ChengzhongFENG QingsongEditorial Office of Journal of Shanghai Jiao Tong Universityarticleballasted railwaydynamic responseorthogonal experimentanalytic hierarchy process (ahp)Engineering (General). Civil engineering (General)TA1-2040Chemical engineeringTP155-156Naval architecture. Shipbuilding. Marine engineeringVM1-989ZHShanghai Jiaotong Daxue xuebao, Vol 55, Iss 01, Pp 48-55 (2021)
institution	DOAJ
collection	DOAJ
language	ZH
topic	ballasted railway dynamic response orthogonal experiment analytic hierarchy process (ahp) Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989
spellingShingle	ballasted railway dynamic response orthogonal experiment analytic hierarchy process (ahp) Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989 WANG Wei LU Sikui YANG Chengzhong FENG Qingsong Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line
description	In order to improve the force condition of ballasted railway subgrade structure and reduce maintenance cost, it is necessary to study the influence of subgrade structure parameters on subgrade dynamic response under train load. Orthogonal test was designed and used to analyze the sensitive relationship between dynamic response of railway subgrade structure and parameters of each structural layer, and the optimal parameter combination of subgrade structure of ballasted railway was determined by combining analytic hierarchy process (AHP) and linear evaluation index. The parameters include elastic modulus of ballast bed, elastic modulus of surface and bottom layer of subgrade bed, thickness of ballast bed, thickness of surface and bottom layer of subgrade bed, and elastic modulus of foundation. The results show that the thickness of track bed is the main factor that affects dynamic stress of ballast bed, dynamic stress and vibration acceleration of surface layer of subgrade bed. The elastic modulus of foundation is the main factor that affects the vertical displacement of the sleeper. The mechanical optimum parameter combination of ballast track structure parameters is determined as the elastic modulus ballast bed is 250 MPa, elastic moduli of surface and bottom layer of subgrade bed are 120 MPa and 115 MPa, the thickness of ballast bed is 0.35 m, the thickness of surface and bottom layer of subgrade bed are 1.1 m and 2.3 m, and the elastic modulus of foundation is 70 MPa.
format	article
author	WANG Wei LU Sikui YANG Chengzhong FENG Qingsong
author_facet	WANG Wei LU Sikui YANG Chengzhong FENG Qingsong
author_sort	WANG Wei
title	Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line
title_short	Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line
title_full	Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line
title_fullStr	Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line
title_full_unstemmed	Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line
title_sort	optimization of subgrade structure parameters of ballasted track passenger dedicated line
publisher	Editorial Office of Journal of Shanghai Jiao Tong University
publishDate	2021
url	https://doaj.org/article/3941464dbc9642acb7ca37e592db1e77
work_keys_str_mv	AT wangwei optimizationofsubgradestructureparametersofballastedtrackpassengerdedicatedline AT lusikui optimizationofsubgradestructureparametersofballastedtrackpassengerdedicatedline AT yangchengzhong optimizationofsubgradestructureparametersofballastedtrackpassengerdedicatedline AT fengqingsong optimizationofsubgradestructureparametersofballastedtrackpassengerdedicatedline
_version_	1718444952765071360

Optimization of Subgrade Structure Parameters of Ballasted Track Passenger Dedicated Line

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