Cascade Subdivision Mile 10.20 - Rock Fall Analysis and Protection of Railway with Ring Net Attenuator and Rock Fall Barrier

The unique requirements of operating a railroad combined with the need to cross extensive stretches of mountainous terrain present many challenges to the Canadian Pacific Railway (CP) in dealing with rock fall hazards. As part of CP’s rock slope stabilization program, rock fall analysis indicated a potential hazard at Mile 010.20 of the Cascade Subdivision on the west side of the Fraser Canyon. Rock fall records and site investigation identified a source area located approximately 270 meters above track level. The height of the source area combined with a slope topography that resulted in multiple potential paths to the track indicated that the most cost-effective overall solution for the site would be two separate mitigation systems. A 42 meter long attenuator using Geobrugg’s ROCCO ring nets was installed at the location where it was possible to excavate catchment ditches. Just to the west of this system above a tunnel portal, a 32 meter long GBE-500A rock fall barrier was installed. After construction a LIDAR scan was performed in order to record the as-built condition of the site. This paper will discuss the site investigation, the design process, and the installation of the systems. It will illustrate the ways in which both solutions were chosen relative to the site conditions and how the specific protection goals were met at the site.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 215-229
  • Monograph Title: Proceedings of the 63rd Annual Highway Geology Symposium (HGS 2012)

Subject/Index Terms

Filing Info

  • Accession Number: 01661544
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 2018 12:25AM