High-speed railway ballast flight mechanism analysis and risk management – A literature review

2019 ◽  
Vol 223 ◽  
pp. 629-642 ◽  
Author(s):  
Guoqing Jing ◽  
Dong Ding ◽  
Xiang Liu
Keyword(s):  
Risk Management ◽  
Literature Review ◽  
High Speed ◽  
Mechanism Analysis ◽  
Railway Ballast ◽  
High Speed Railway

scholarly journals UNDERSTANDING CRITICAL VARIABLES CONTRIBUTING TO COMPETITIVE ADVANTAGES OF INTERNATIONAL HIGH-SPEED RAILWAY CONTRACTORS

2019 ◽  
Vol 25 (2) ◽  
pp. 184-202 ◽  
Author(s):  
Yanliang Niu ◽  
Xiaopeng Deng ◽  
Limao Zhang ◽  
Xiaochen Duan
Keyword(s):  
Risk Management ◽  
Factor Analysis ◽  
Pilot Study ◽  
Literature Review ◽  
Marketing Strategy ◽  
High Speed ◽  
Competitive Advantages ◽  
High Speed Railway ◽  
Management Capability

This article is devoted to identifying and explaining the critical variables contributing to competitive advantages in international High-Speed Railway (HSR) projects from the contractor’s perspective. A total of 24 variables were identified by the literature review and a pilot study. An international questionnaire survey was performed to obtain professional opinions from both practitioners and the academy. The 24 variables were ranked and clustered into 6 factors using exploratory factor analysis. Furthermore, a case study of the Early Train Operator project of the California HSR was carried out by the survey, interview, and first-hand data. The results indicated that the top six ranked variables are (1) None Accident History, (2) Eligibility & International Criteria, (3) Contract Reputation, (4) Marketing Strategy, (5) Risk Management Capability, and (6) Technical Responsiveness. Furthermore, the 24 variables are grouped into six dimensions: Glocalization, Marketing, Safety, Economics, Technology, and Responsibility. The case study indicated that the factor framework was suitable and tractable for the application. The findings of this paper could (1) assist international HSR contractors in obtaining a better understanding of the deeper determinates of competitive advantages and (2) serve as a valuable reference for developing their competitive advantages in the international HSR market.

Method to Quantify Realistic Particle Shape Angularity and Texture of High-Speed Railway Ballast Aggregate

ICTE 2013 ◽  
2013 ◽  
Author(s):  
Zhaoxing Fu ◽  
Chengbiao Cai ◽  
Peng Xu ◽  
Zhenchao Zhagn ◽  
Xueyi Liu
Keyword(s):  
Particle Shape ◽  
High Speed ◽  
Railway Ballast ◽  
High Speed Railway

scholarly journals The mechanism analysis of micro frost heave coarse-grained filling material in the high-speed railway

2016 ◽  
Vol 2 (47) ◽  
pp. 1660-1663 ◽  
Author(s):  
Yang-sheng Ye ◽  
De-goui Cai ◽  
Hong-ye Yan ◽  
Jian-ping Yao ◽  
Qian-li Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
Coarse Grained ◽  
Frost Heave ◽  
Filling Material ◽  
Mechanism Analysis ◽  
High Speed Railway

scholarly journals Investigating Political Risk Paths in International High-Speed Railway Projects: The Case of Chinese International Contractors

2019 ◽  
Vol 11 (15) ◽  
pp. 4157 ◽  
Author(s):  
Tengyuan Chang ◽  
Xiaopeng Deng ◽  
Bon-Gang Hwang
Keyword(s):  
Risk Factors ◽  
Social Support ◽  
Risk Management ◽  
High Speed ◽  
Political Risk ◽  
Equation Modeling ◽  
The Political ◽  
Clear Understanding ◽  
External Interference ◽  
High Speed Railway

Contracting in international high-speed railway (HSR) projects is a risky business. The success of these projects and the sustainable development of international contractors are inseparable from effective risk management. However, limited research has been conducted to investigate the political risk involved in international HSR projects. As HSR development is becoming a more major part of the global construction market, this paper investigates the political risk factors specific to the projects and the relationships among the factors. Through a literature review and a pilot interview conducted with five Chinese professionals, 26 political risk factors were proposed. A questionnaire was then administered to 112 experts from both academia and industry to assess the significance of the factors. By applying partial least-squares structural equation modeling (PLS-SEM) technology, the 26 factors were clustered into eight groups, and 10 significant risk paths were identified. Specifically, “government attitudes” can directly influence the “investment profile” and “social support” can directly influence “government attitudes,” while “government instability,” “economic climate,” “financing and costs,” “external interference,” and “contractors’ operations” can indirectly influence investment profile by directly influencing “government attitudes” or “social support.” The findings of this study can assist international contractors with gaining a clear understanding of the political risk involved in international HSR projects, which will lead to more effective political risk management as well as better business decisions. Furthermore, this paper will contribute to the global body of knowledge in the area of political risk management for large-scale international projects.

scholarly journals Experimental study of flying ballast at high speed railway applying track vibration

2020 ◽  
Vol 21 (4) ◽  
pp. 401
Author(s):  
Mohammad Reza Talaee ◽  
Behtash Hakimzadeh
Keyword(s):  
Wind Tunnel ◽  
High Speed ◽  
Risk Mitigation ◽  
Mass Range ◽  
Air Velocity ◽  
Railway Ballast ◽  
High Speed Railway ◽  
New Strategy ◽  
Track Surface ◽  
Mitigation Methods

In this paper the complete approach is introduced for study of Ballast flying in wind tunnel considering track vibrations and aerodynamic loads. The air velocity profile under high speed train with speed of 300 km/h is introduced using an analytical approach and the intensity of under train wind is defined. About 50 kg of Iranian high speed railway ballast is adopted by random sampling and classified according to mass and aerodynamic shape. The critical velocities of ballast moving are measured by wind tunnel for all classification to obtain the ballast flying probability factor (BFPF) at two modes of with and without track vibration. Also, the conventional ballast flying risk mitigation methods in wind tunnel are reviewed and a new strategy for ballast flying risk mitigation is introduced and tested, based on the design of track surface by a special sieved group of ballasts with minimum flying probability factor. Results show that the BFPF increases in presence of vibration and the minimum value of BFPF is occurred at mass range of 150–200 g. It's stated that application of this group on the track surface may prevent from ballast flying due to passing of train with maximum speeds of 300 km/h.

Study on the Safety Management System of High-Speed Railway

2015 ◽  
Vol 744-746 ◽  
pp. 1838-1842
Author(s):  
Hong Wen Guo ◽  
Yu Guang Wei
Keyword(s):  
Risk Management ◽  
Management System ◽  
High Speed ◽  
Safety Management ◽  
Aviation Safety ◽  
Safe Operation ◽  
High Speed Railway ◽  
Safety Management System ◽  
Basic Module ◽  
Operation Characteristics

Safety management system is a kind of aviation safety management idea[1]. With the mileage increase of the high-speed railway of China, there is an urgent need to establish a structured safety management system according to its own characteristics, which can ensure the safe operation of high-speed railway. First this paper considers the life cycle of high-speed railway, then learns aviation safety management system, and studies the operation characteristics of high-speed railway, finally this paper establishes the system based on the theory of PDCA、risk management, and the principle of the system. The safety management system of high-speed railway have four modules: the basic module, operation module, supervision module, improvement module.

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