scholarly journals Design and construction of simple beam bridges for high-speed rails in China: standardization and industrialization

2016 ◽  
Vol 11 (4) ◽  
pp. 274-282 ◽  
Author(s):  
Gonglian Dai ◽  
Miao Su ◽  
Y. Frank Chen
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Eastern China ◽  
Experimental Tests ◽  
High Speed Rail ◽  
Load Models ◽  
Construction Methods ◽  
Construction Experience ◽  
Dynamic Performances ◽  
Design And Construction

High-speed rail provides a safe, efficient, and economic transportation system for regions with high population density such as eastern China. To accommodate the rapid development of high-speed rails in China, the bridges with standard spans have been identified as the main infrastructure type. This article provides a state-of-the-art review on the design and construction of the standard simply-supported beam (simple beam) bridges for high-speed rails in China. The structural components discussed include the main girder, deck, and substructure. The live load models, deformation limiting values, and construction methods for the bridges are also discussed. Additionally, the experimental tests were conducted to verify the static and dynamic performances of the structure. The main objective of this paper is to provide the latest design and construction experience of Chinese standard simple beam bridges in high-speed rail and show how a quick and quality engineering has been achieved by utilizing these standardized bridges.

scholarly journals How Does the Spatial Structure of High-Speed Rail Station Areas Evolve? A Case Study of Zhengzhou East Railway Station, China

2021 ◽  
Vol 11 (23) ◽  
pp. 11132
Author(s):  
Xiaomin Wang ◽  
Jingyu Liu ◽  
Wenxin Zhang
Keyword(s):  
Spatial Structure ◽  
High Speed ◽  
Rapid Development ◽  
Economic Activities ◽  
Land Rent ◽  
High Speed Rail ◽  
Production Factors ◽  
Market Factors ◽  
And Diffusion

The rapid development of high-speed rail (HSR) and station areas has shortened the spatial and temporal distances among cities, improved the accessibility of cities, and affected the spatial agglomeration and diffusion of populations and of social and economic activities. This has led to spatial reconfiguration of production factors within cities, which has the potential to drive the reconstruction of urban spatial structures. Based on POI and land-use data, this paper defines the spatial scope of the HSR station area and explores the characteristics and influencing factors of its spatial structure from the perspective of industry. The study area i is set at 2000 m. Since the opening of the HSR, the industrial distribution has exhibited a significant circular, multi-core, and axial belt spatial structure. The spatial structure of each sub-industry is different. On the whole, internal and external transport and agglomeration economies have significant impacts on the industrial spatial distribution, and land rent has gradually decreased in importance with the development of HSR station areas. The intensity of the effects of different factors varies among different industries. The mechanisms by which the spatial structure of the station area is formed are discussed and include location accessibility, micro-market factors, node station attributes, the availability of a sufficient amount of undeveloped land, the characteristics and needs of HSR passengers, and policies and systems.

Research on Spacial Displacement Regulations in Soft Surrounding Rock Tunnel

2013 ◽  
Vol 690-693 ◽  
pp. 886-889
Author(s):  
Bao Long Lin
Keyword(s):  
High Speed ◽  
Surrounding Rock ◽  
Construction Process ◽  
High Speed Rail ◽  
Tunnel Stability ◽  
Construction Methods ◽  
Minimum Principal Stress ◽  
Initial Support ◽  
Rock Tunnel ◽  
Weak Surrounding Rock

Based on the engineering background of Dongkeling tunnel of Guizhou-Guangzhou high-speed rail, construction process in soft surrounding rock is simulated by using finite difference software——FLAC according to large-deformation characteristics in water-rich and weathering altered granite weak surrounding rock. Several aspects, such as vault settlement, invert uplift, clearance convergence, surface settlement, the maximum and minimum principal stress of the initial support and plastic zone of surrounding rock, are analyzed to determine the tunnel stability with different construction methods.

High Speed Rail: Track Construction Considerations

2011 ◽  
Author(s):  
Blaine O. Peterson
Keyword(s):  
High Speed ◽  
Optimal Solution ◽  
Rolling Stock ◽  
High Speed Rail ◽  
Track Geometry ◽  
Slab Track ◽  
Passenger Rail ◽  
Construction Methods ◽  
Track System ◽  
Ballasted Track

This paper discusses general High Speed Rail (HSR) track geometry, construction and maintenance practices and tolerances. The discussion will reference several key international projects and highlight different construction methods and the track geometry assessments used to establish and ensure serviceability of a typical HSR system. Historically, established tighter tolerances of “Express” HSR (i.e. operating speeds greater than 240 km/h or 150 mph) systems have favored the use of slab track systems over ballasted track systems. Slab track systems offer greater inherent stability while ballasted track systems generally require more frequent track geometry assessments and anomaly-correcting surfacing operations. The decisions related to which system to use for a given application involve numerous considerations discussed only briefly in this paper. In many cases, the optimal solution may include both track forms. Rolling stock considerations and their influence on track infrastructure design are considered beyond the scope of this paper. This paper will focus predominantly on two slab track systems widely used in international HSR projects: the Japanese J-slab track system; and the German Rheda slab track system. The French track system will be referenced as the typical ballasted track HSR design. The practices discussed in this paper generally apply to systems which are either primarily or exclusively passenger rail systems. In the U.S., these types of systems will necessarily exclude the systems the Federal Railway Administration (FRA) refers to as “Emerging” or “Regional” HSR systems which include passenger train traffic to share trackage on, what are otherwise considered, primarily freight lines.

Cracking Analysis and Reinforcement Method for a Thin-Wall Plain-Concrete Pier

2014 ◽  
Vol 578-579 ◽  
pp. 1007-1011
Author(s):  
Wen Ya Ye ◽  
Xiao Qing Wu
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Plain Concrete ◽  
Thin Wall ◽  
High Speed Rail ◽  
Railway Bridges ◽  
Massive Concrete ◽  
Increasing Trend ◽  
Treatment Measures ◽  
Construction Condition

In view of the rapid development of the high-speed rail construction in China at present, some new plain concrete piers of railway bridges cracked in an increasing trend. Combining a real project, this paper analyzed the causes of the cracking in massive concrete piers through the actual construction condition and the materials prosperities, and made corresponding prevention and improvements for the cracking, provided the reinforcing treatment of cracking piers with corresponding programmes. The analysis and treatment measures for the project will present a reference for the similar projects in the future.

Failure analysis and fatigue life prediction of high-speed rail clips based on DIC technique

2021 ◽  
Vol 13 (12) ◽  
pp. 168781402110662
Author(s):  
Yan Liu ◽  
Xiujie Jiang ◽  
Qiutong Li ◽  
Huan Liu
Keyword(s):  
Fatigue Life ◽  
Service Life ◽  
Fatigue Failure ◽  
High Speed ◽  
Experimental Tests ◽  
Image Correlation ◽  
Fe Model ◽  
Rail Transportation ◽  
High Speed Rail ◽  
Dic Technique

With the development of rail transportation, the fatigue failure of rail clips has become an issue, which affects the operational safety of trains. In this study, reasons for the fatigue failure of rail clips were investigated to improve their service life. A digital image correlation (DIC) technique was conducted to obtain strain fields, vibration modes, and natural frequencies of a rail clip. The strain and displacement of a rail clip under dynamic cyclic loading were also obtained. A fastener system refinement model was developed to analyze the static, dynamic, and modal responses of the clip. The experimental tests and modal simulation results were mutually verified. The fatigue life was analyzed based on the verified FE model. The results revealed that the maximum strain and minimum fatigue life occur at the heel of the clip, in good agreement with the actual fracture position. As the amplitude and frequency of dynamic cyclic load increased, the fatigue life of the clip decreased sharply. Moreover, the normal wheel–rail force accompanied by high-frequency rail corrugations accelerated crack initiation and reduced the fatigue life. The findings of this study provide guidance for improving the service life of rail clips.

Analysis on the Main Factors Influencing the High-Speed Railway Passenger Flow

2014 ◽  
Vol 919-921 ◽  
pp. 1085-1090
Author(s):  
Yuan Huang ◽  
He Song ◽  
Chun Yan Jia
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Service Level ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Factors Affecting ◽  
Passenger Flow ◽  
Survey Statistics ◽  
Main Factors ◽  
The Times

With the rapid development of our national economy, the fast process of city, regional passenger demand is increasing rapidly, high-speed railway emerging as the times requiring. High-speed railway has many advantages in essence and also some disadvantages. How to use its advantages, how to avoid their disadvantages, is important for the advantageous to improve the interests of the company on high speed railway transport department and railway sector, as well as the social development. Through the way of questionnaire survey, statistics and analyzes the main factors affecting the High-speed Rail passenger flow, provides more active mode of operation for the High-speed Rail department. This paper raised the urgent and realistic basis to improve the service level.

Research of High-Speed Rail Express Delivery Market Demand Prediction Problem in China

2016 ◽  
Vol 851 ◽  
pp. 899-903
Author(s):  
Li Hua Shao ◽  
Yu Zhao
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Market Demand ◽  
High Speed Rail ◽  
Environmental Friendliness ◽  
Demand Prediction ◽  
Utility Index ◽  
Combination Forecasting ◽  
Freight Volume ◽  
Transportation Organization

The rapid development of high-speed railway brought tremendous opportunity for the quick transport of goods development. Great efforts to build high-speed rail not only release the existing railway transport capacity, but also provide a new choice to the quick transport of goods. This paper choose some factors to analysis which will influence the express transport, using time series forecasting prediction and gray combination forecasting method to predict results of the 2020 Express Freight shipments. By selecting the integrity, economy, efficiency, convenience, punctuality, service and environmental friendliness those seven Utility Index, established Logit cargo flow rate balancing model, to concluded that high-speed fast freight volume in 2020, which provide references for high-speed rail fast cargo transportation organization.

Sign in / Sign up

Export Citation Format

Share Document