The Optimal Design Principles and Method of Crushed-Rock Based Embankment in Cold Regions

Crushed-rock based embankment (CRBE) is widely adopted in road construction in cold regions for its active cooling effect. The factors influencing the cooling effect of CRBE mainly include environmental temperatures, the thickness of crushed-rock layer, the thickness of upper refilled layer, the crushed-rock diameter, and the ratio of crushed-rock layer width to height. The optimal CRBE design represents an embankment structure that has the most efficient cooling effect on the roadbed and that protects the frozen soil. This paper discusses five principles in optimal CRBE design and the restrictions to individual factors related to each principle. According to these restrictions and the relationships among the factors, the authors propose an optimal design method using the air-convection Rayleigh number, Ra, in crushed rocks. Taking CRBE of Qinghai-Tibet railway in Beiluhe area as an example, the authors calculate the optimal embankment structure using the design method. The results show that the optimal structure is similar to the construction embankment structure designed in light of experiments, which indicates the feasibility of the optimal design method.

• Record URL:
  • https://doi.org/10.1061/9780784412473.001
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784412473
• Supplemental Notes:
  • © 2012 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Wang, Aiguo
  • Ma, Wei
• Conference:
  • Cold Regions Engineering 2012
  • Location: Quebec City Quebec, Canada
  • Date: 2012-8-19 to 2012-8-22
• Publication Date: 2012-8

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1-11
• Monograph Title: Cold Regions Engineering 2012: Sustainable Infrastructure Development in a Changing Cold Environment

Subject/Index Terms

• TRT Terms: Cooling; Crushed rock; Design; Embankments; Frigid regions
• Identifier Terms: Qinghai-Tibet Railway
• Subject Areas: Design; Geotechnology; Railroads;

Filing Info

• Accession Number: 01893360
• Record Type: Publication
• ISBN: 9780784412473
• Files: TRIS, ASCE
• Created Date: Sep 18 2023 8:49AM