scholarly journals Railway Track Transition Zones: Design, Construction, Monitoring and Numerical Modelling

2013 ◽  
Vol 2 (4) ◽  
pp. 33-58 ◽  
Author(s):  
E. Fortunato ◽  
A. Paixão ◽  
R. Calçada
Keyword(s):  
Numerical Modelling ◽  
Railway Track ◽  
Construction Monitoring ◽  
Transition Zones ◽  
Design Construction

scholarly journals Modelling of Railway Track Temperature Regime with Real Heat-Technical Values for Different Climatic Characteristics

2017 ◽  
Vol 13 (2) ◽  
pp. 134-142 ◽  
Author(s):  
Stanislav Hodás ◽  
Alžbeta Pultznerová
Keyword(s):  
Numerical Modelling ◽  
Temperature Regime ◽  
Railway Track ◽  
High Quality ◽  
Time Operation ◽  
Negative Temperatures ◽  
Freezing Period ◽  
Long Time ◽  
Climatic Characteristics

Abstract High quality of railway track construction is a major priority. One of the quality elements is the resistance to load of railway formation with individual structural layers caused by negative temperatures during the critical freezing period of winter. Numerical modelling allows obtaining more control outputs at different climatic loads. The presented paper shows the load of railway track model with different variants of climate and shows the importance in the designing of the non-transport load under negative temperatures, i.e. observation of transition of the zero isotherm through the layers of railway subgrade. If the subgrade layers of the railway formation are built with high quality and durability then the axis of the track will keep its geometric spatial position during the long-time operation.

scholarly journals Under sleeper pads in transition zones at railway underpasses: numerical modelling and experimental validation

2014 ◽  
Vol 11 (11) ◽  
pp. 1432-1449 ◽  
Author(s):  
Cristina Alves Ribeiro ◽  
André Paixão ◽  
Eduardo Fortunato ◽  
Rui Calçada
Keyword(s):  
Numerical Modelling ◽  
Experimental Validation ◽  
Transition Zones

Numerical Modelling of Capillary Transition Zones

2000 ◽  
Author(s):  
Geir Terje Eigestad ◽  
Johne Alex Larsen
Keyword(s):  
Numerical Modelling ◽  
Transition Zones

The Countermeasures on Temperature and Shrinkage Crack of Mass Concrete

2014 ◽  
Vol 580-583 ◽  
pp. 2324-2327
Author(s):  
Xian Chun Zheng ◽  
Peng Fei Li ◽  
Si Zhong Sun
Keyword(s):  
Material Selection ◽  
Structure Design ◽  
Raw Material ◽  
Mass Concrete ◽  
Construction Monitoring ◽  
Shrinkage Crack ◽  
Shrinkage Cracks ◽  
Practical Engineering ◽  
Raw Material Selection ◽  
Design Construction

Combined with practical engineering，this paper analyzes the mechanism of mass concrete temperature and shrinkage cracks, from raw material selection, structure design, construction, monitoring and management five aspects,the author respectively gives the countermeasures on temperature and shrinkage crack of mass concrete, reference for engineers.

scholarly journals Design of ballasted railway track foundations using numerical modelling. Part II: Applications

2018 ◽  
Vol 55 (3) ◽  
pp. 369-396 ◽  
Author(s):  
Md. Abu Sayeed ◽  
Mohamed A. Shahin
Keyword(s):  
Numerical Modelling ◽  
Case Studies ◽  
Design Method ◽  
Field Measurements ◽  
Railway Track ◽  
Moving Loads ◽  
Practical Application ◽  
Field Case ◽  
Repeated Applications ◽  
Good Agreement

This paper is the second of two companion papers in relation to a new design method for ballasted railway track foundations. Development of the new design method has been explained in the first paper (i.e., Part I: Development), and the procedures for using the method and its practical application on some field case studies are presented in this paper. A special feature of the proposed design method is that it considers the true impact of train dynamic moving loads and number of repeated applications of the traffic tonnage. The proposed method is applied to four case studies of actual tracks and the results are compared with field measurements and found to be in good agreement. It should be noted that, although the proposed design method is able to overcome most shortcomings of the existing methods and found to provide excellent outcomes, further verification with more field case studies is highly desirable.

A Framework for Defining a Sustainability Rating System for Railway Track-Beds

2017 ◽  
Author(s):  
Sara Bressi ◽  
Gaetano Di Mino ◽  
Davide Lo Presti
Keyword(s):  
Best Practices ◽  
Renewable Resources ◽  
Rating System ◽  
Railway Track ◽  
Road Engineering ◽  
Maximum Score ◽  
Railway Infrastructure ◽  
Sustainability Framework ◽  
Economic And Social Impacts ◽  
Design Construction

Railways perform a significant role in the transportation system and they have relevant environmental, economic and social impacts. They are currently engineered optimizing every singular aspect rather than considering a broader system for improving the sustainability of the overall infrastructure. Thus, it is necessary to promote an effort to define a global sustainability framework for conceiving the design, construction and management of railway infrastructure. The Sustainable Rating System (SRS) proposed in this paper is a tool under development that evaluates different alternatives of railway track-bed structure. Inspired by similar efforts in the field of road engineering such as Greenroads and Greenpave, this SRS aims to be the first entirely dedicated to support railway engineers, designers and managers in taking more responsible decisions with regards to the sustainable design and maintenance of railway track-beds. It is based on a library that examines different solutions and treatments for each element of the track-bed and a table of points that assigns different scores to the different alternatives. To achieve the highest score in terms of sustainability it is necessary to maximize the points assigned to every element. In other words, the maximum score requires adopting best practices leading to more sustainable choices such as exploiting the use of recycled materials, reducing the use of non-renewable resources, the energy consumption, air pollutants and greenhouse gas emissions.

scholarly journals RESEARCH OF DEVELOPMENT TRENDS OF HIGH-SPEED TRAFFIC IN THE REPUBLIC OF KAZAKHSTAN

2021 ◽  
Vol 118 (3) ◽  
pp. 22-28
Author(s):  
Yermek Bitigov ◽  
Dinar Bekzhanov ◽  
Saule Bekzhanova
Keyword(s):  
High Precision ◽  
High Speed ◽  
Railway Track ◽  
Rolling Stock ◽  
High Tech ◽  
Technical Solution ◽  
Effective System ◽  
The Creation ◽  
The Republic ◽  
Design Construction

The start of work on the high-speed highway has become a real technological challenge. Since we are talking about a new high-tech railway facility, there is a need for fundamentally new engineering and technical solutions, innovative approaches to conducting surveys, designing, building and operating new rolling stock and infrastructure.High accuracy in the design, construction and maintenance of the railway track is of key importance in the creation of a high-speed highway. A thorough analysis of the experience of the world's leading organizations in China, Japan and European countries, specializing in the creation and operation of high-speed highways, shows that the most effective system-technical solution is the transition to the use of high-precision coordinate methods of design, construction and maintenance management of infrastructure and rolling stock.It is precisely the high-precision coordinate methods that open the way to the transition to the operation of the infrastructure in the design position. And this, according to the world's leading experts, is an opportunity to reduce the cost of the current maintenance of such an expensive infrastructure by 20-30%.The technical solution that ensures the use of coordinate methods in the" end-to-end " technological life cycle of infrastructure objects is the creation of a high-precision coordinate system along the directions of the high-speed highway.

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