Multiobjective Railway Alignment Optimization Using Ballastless Track and Reduced Cross-Section in Tunnel

Sustainability

卷:13

Salvatore Antonio Biancardo¹  Ernesto Di Lisa¹  Gianluca Dell’Acqua¹  Francesco Avella¹  Francesco Abbondati²  Xinqiang Chen³ 

[1] Department of Civil, Construction and Environmental Engineering, Federico II University of Naples, 80125 Naples, Italy;

[2] Department of Engineering, Parthenope University of Naples, 80133 Naples, Italy;

[3] Institute of Logistics Science and Engineering, Shanghai Maritime University, Shanghai 201306, China;

关键词: railway alignment optimization;    decision process;    cost-benefit analysis;    facilities planning and design;   

DOI  :  10.3390/su131910672

来源: DOAJ

【 摘 要 】

The increasing need for railway planning and design to connect growing cities in inland mountainous areas has pushed engineering efforts toward the research of railway tracks that must comply with more restrictive constraints. In this study, a multiobjective alignment optimization (HAO), commonly used for highway projects, was carried out to identify a better solution for constructing a high-speed railway track considering technical and economic feasibilities. Then, two different and innovative scenarios were investigated: an unconventional ballastless superstructure, which is more environment-friendly than a gravel superstructure, and a reduced cross-section in a tunnel, which enables a slower design speed and then, less restrictive geometric constraints and earthmoving. The results showed that the first solution obtained a better performance with a slight increase in cost. Moreover, both scenarios improved the preliminary alignment optimization, reducing the overall cost by 11% for the first scenario and 20% for the second one.

【 授权许可】

Unknown