scholarly journals Justification of a rational option of development of the highspeed railway according to technical, technological and economic criteria

2021 ◽  
pp. 129-135
Author(s):  
Anna Leonidovna Kravets ◽  
Arkadii Valerievich Chernolutskyi ◽  
Svyatoslav Vitalievich Serpokrylov
Keyword(s):  
Travel Time ◽  
Capital Investment ◽  
High Speed ◽  
Systemic Effect ◽  
Single Track ◽  
High Speed Railway ◽  
Passenger Traffic ◽  
First Case ◽  
Distribution Of Resources ◽  
Economic Criteria

When a new high-speed railway is designed on the routes with the existing mixed(freight and passenger) traffic, part of the trains can be relocated from the existing railway to thenew one. This will have an additional effect of the increasing current capacity of the existing railway. A method is proposed for justification of a rational option for the development of a high-speedrail on the basis of technical, technological and economic criteria. It is proposed to solve the problemof determining the rational option for the development of a high-speed railway as the problem ofoptimal distribution of resources among the components of the railway, taking into account technical,technological and economic criteria. The result is a set of solutions consisting of options for thedevelopment of each component of the railway, which will provide the maximum systemic effect forthe railway as a whole. Each jth option of the development of the ith component of a high-speed railwaycan be described by three main indicators: the travel time of a high-speed train; capital investmentsrequired to implement this option; and the available traffic capacity of the component. Depending onthe problem being solved, each of the listed parameters can act both as a criterion and as a limitation.Depending on the purposes of the design, it is proposed to consider the problem of determiningthe rational option for the railway development either in the direct or inverse setting. In the first case,the systemic effect is expressed by an objective function that minimizes the amount of necessarycapital investments in the railway infrastructure while ensuring the stipulated travel time of a highspeed train. In the second case, the purpose is to minimize the travel time of the train withoutexceeding the specified amount of capital investment in the development of all components of therailway.The results obtained can be used to justify decisions on the use of single-track components andto determine the rational configuration of single-track lines when high-speed traffic is organized.

Typical Portal Structure for Single Track High Speed Railway Tunnel in Rugged Mountainous Area with High and Abrupt Slope

2014 ◽  
Vol 716-717 ◽  
pp. 342-346
Author(s):  
Xiao Jun Zhou ◽  
Bo Jiang ◽  
Yue Feng Zhou ◽  
Yu Yu
Keyword(s):  
High Speed ◽  
Southwest China ◽  
Earth Pressure ◽  
Mountainous Area ◽  
Single Track ◽  
Railway Tunnel ◽  
High Speed Railway ◽  
Railway Line ◽  
Bridge Abutment

On the basis of different landform and multifarious topography in rugged mountainous area in southwest China, typical tunnel portals for single track tunnels in a new high speed railway line have been presented in the paper. The portal comprises headwall, shed tunnel, bridge abutment and its support. Portal with headwall is suitable for tunnel to resist front earth pressure on high and abrupt slope. Shed tunnel is placed in front of headwall so as to prevent rockfall; its outward part is built into a flared one. Meanwhile, the installation of bridge and its abutment are also included in the portal according to landform in the paper.

scholarly journals Optimal High-Speed Railway Timetable by Stop Schedule Adjustment for Energy-Saving

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Dingjun Chen ◽  
Sihan Li ◽  
Junjie Li ◽  
Shaoquan Ni ◽  
Xiaolong Liu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Travel Time ◽  
High Speed ◽  
Optimization Techniques ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Running Time ◽  
Total Travel Time ◽  
Timetable Optimization

Timetable optimization techniques offer opportunity for saving energy and hence reducing operational costs for high-speed rail services. The existing energy-saving timetable optimization is mainly concentrated on the train running state adjustment and the running time redistribution between two stations. Not only the adjustment space of timetables is limited, but also it is hard for the train to reach the optimized running state in reality, and it is difficult to get feasible timetable with running time redistribution between two stations for energy-saving. This paper presents a high-speed railway energy-saving timetable based on stop schedule optimization. Under the constraints of safety interval and stop rate, with the objective of minimizing the increasing energy consumption of train stops and the shortest travel time of trains, the high-speed railway energy-saving timetable optimization model is established. The fuzzy mathematics programming method is used to design an efficient algorithm. The proposed model and algorithm are demonstrated in the actual operation data of Beijing-Shanghai high-speed railway. The results show that the total operating energy consumption of the train is reduced by 3.7%, and the total travel time of the train is reduced by 11 minutes.

South-east Asian aviation faces growing pains

2019 ◽  
Keyword(s):  
High Speed ◽  
Aviation Industry ◽  
South East Asia ◽  
Kuala Lumpur ◽  
High Speed Railway ◽  
Content Type ◽  
Passenger Traffic ◽  
Development Costs ◽  
Growing Pains ◽  
The World

Subject Challenges facing South-east Asia's aviation industry. Significance South-east Asia is experiencing one of the sharpest increases in air passenger traffic anywhere in the world. Besides intensifying competition between airlines, this is prompting disputes over airspace and straining capacity at many of the region’s airports. Impacts Indonesia’s establishment of air defence identification zones could intensify territorial and airspace disputes in the South China Sea. The deferral of the Kuala Lumpur-Singapore high-speed railway will mean little change to air traffic levels between the two places. Changes to funding for Malaysian airport operators could result in higher fees being passed on to passengers to cover development costs.

scholarly journals Innovative Geoinformation Systems for the Design of Communication Paths

2020 ◽  
Author(s):  
Yevheniia Ugnenko ◽  
Olha Tymchenko ◽  
Elena Uzhviieva ◽  
Nataliia Sorochuk ◽  
Gintas Viselga
Keyword(s):  
High Speed ◽  
Railway Network ◽  
High Speed Railway ◽  
Passenger Traffic ◽  
Gradual Introduction ◽  
Railway System ◽  
Basic Characteristics ◽  
The Cost ◽  
Cost Of Construction ◽  
Communication Paths

The article analyses the volume of passenger traffic from 1990 to 2019 for land, water and air transport. From the materials obtained and the experience of the networks of European and world high-speed railways, goals are set. High-speed lines designed exclusively for passenger traffic. This moment plays an important role in reducing the cost of construction, increasing the market and economic profitability. According to the data from the State Statistics Service of Ukraine, it is possible to calculate the passenger flow based on the known parameters for 2020–2032 in the direction of Kiev–Lviv. The design of high-speed lines should meet general requirements aimed at satisfying the basic characteristics of a high-speed railway system, which works in conjunction with the European High-Speed Railway network. The compatibility of the parameters of high-speed lines with the parameters of traditional lines is part of the operational requirements for the gradual introduction of a network of high-speed railways. Possible scenarios to achieve the required compatibility should cover all subsystems.

scholarly journals Alternate Double Single Track Lines

2016 ◽  
Author(s):  
Zacarias Grande Andrade ◽  
Paola Moraga Contreras ◽  
Enrique Castillo Ron
Keyword(s):  
Travel Time ◽  
High Speed ◽  
Time Increase ◽  
Single Track ◽  
Maintenance Costs ◽  
Railway Infrastructure ◽  
Double Track

The paper discusses the advantages and shortcomings of alternate double single track (ADST) lines with respect to double track lines for high speed lines. ADST lines consists of sequences of double and single track segments optimally selected in order to reduce the construction and maintenance costs of railway lines and to optimize the timetables used to satisfy a given demand. The single tracks are selected to coincide with expensive segments (tunnels and viaducts) and the double tracks are chosen to coincide with flat areas and only where they are necessary. At the same time, departure times are adjusted for trains to cross at the cheap double track segments. This alternative can be used for new lines and also for existing conventional lines where some new tracks are to be constructed to reduce travel time (increase speed). The ADST proposal is illustrated with some examples of both types (new lines and where conventional lines exist), including the Palencia-Santander, the Santiago-Valparaíso-Viña del Mar and the Dublin-Belfast lines, where very important reductions (90 %) are obtained, especially where a railway infrastructure already exist.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3426

scholarly journals Research on Selection of Prefabricated Lining Design for Single-Track Tunnel of High Speed Railway

2020 ◽  
Vol 455 ◽  
pp. 012134
Author(s):  
Shenglong Zhang ◽  
Zhiwei Wang ◽  
Kai Chang ◽  
Peng Zhao ◽  
Zihong Wang ◽  
...  
Keyword(s):  
High Speed ◽  
Single Track ◽  
High Speed Railway ◽  
Selection Of

A Method for Predicting Probabilistic Resource Conflicts between Trains

2014 ◽  
Vol 641-642 ◽  
pp. 745-752
Author(s):  
Jian Bo Zheng ◽  
Jing Wen Guo
Keyword(s):  
Travel Time ◽  
High Speed ◽  
Influence Factors ◽  
Travel Time Reliability ◽  
High Speed Railway ◽  
Resource Conflicts ◽  
Railway Construction ◽  
Train Dispatching ◽  
Conflict Prediction ◽  
Reliable Basis

The development of high-speed railway construction and operation greatly shorten people's travel time, however, the demand of people on travel time reliability becomes more and more prominent, so train dispatching plans are becoming more and more important. This paper defines probabilistic conflicts between trains, analyses probabilistic conflict influence factors and comes up with a method for predicting probabilistic resource conflicts between trains. The method aims to improve the accuracy of train conflict prediction, provide more reliable basis to solve train conflicts and develop more efficient train dispatching plans.

scholarly journals Estimation of conditions of using combined single-track and double-track railways at high-speed traffic

2018 ◽  
Vol 216 ◽  
pp. 02010 ◽  
Author(s):  
Alexei Dmitrenko ◽  
Sergei Karasev ◽  
Alexandra Kalidova ◽  
Dmitry Sivitsky
Keyword(s):  
Simulation Modeling ◽  
High Speed ◽  
Capital Investments ◽  
Single Track ◽  
Railway Transportation ◽  
Relevant Issue ◽  
Important Condition ◽  
High Speed Railway ◽  
Double Track ◽  
Track Line

An important condition when arranging high-speed railway transportation with insignificant traffic is saving of capital investments in construction of new lines or the reconstruction the existing ones. Development of methods for multi-criteria estimation of the possibility of using fully single-track blocks on a line with high-speed traffic, as well as single-track blocks with double-track inserts, is a relevant issue. The purpose of the study is to develop the criteria and the method for estimation of the feasibility of using single-track elements on a line with high-speed traffic. Methods of simulation modeling, mathematical statistics, regression analysis were used. A method that includes estimation of the technological conditions of using single-track elements on a line with high-speed traffic instead of double-track blocks was developed. The method can be used for multi-criteria optimization of the configuration of a combined single-track and a double-track line using single-track elements in high-cost areas.

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