Attenuators for Controlling Rock Fall: Do We Know How They Work? Can We Specify What They Should Do?

Rock fall attenuator systems, also known as hybrid rock fall barriers or hanging nets….do we know how they work, do we know what should be specified to have the intended rock fall mitigation? What is the mitigation strategy? Is the expectation to slow the rock down or stop the rock? A joint testing program is being carried out by Wyllie & Norrish Rock Engineers Ltd. and Geobrugg North America, LLC to measure and validate the performance of rock fall attenuator systems. The preliminary stages of full-scale testing have been conducted at the Nicolum Quarry in Hope, BC. Tests were conducted using natural rocks and steel reinforced concrete cubes with dimensions of 0.75 m and 1 m dropped from heights of 60 m. The preliminary tests were documented with a high speed camera and load cells on the support ropes. The videos have been analyzed to determine the change in the rock fall velocity and energy, and the deflection of the attenuator net. The objective of the tests is to find how to optimize system designs to minimize the impact energy that is absorbed by the net and the support structure.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: pp 414-430
  • Monograph Title: Proceedings of the 66th Highway Geology Symposium (HGS 2015)

Subject/Index Terms

Filing Info

  • Accession Number: 01638276
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 9 2017 4:39PM