Stabilization of Paleo Stream Deposits Using High Tensile Steel Mesh

The SR 87 Curve Realignment project is located north of the Phoenix metropolitan area approximately 40 miles and was partially required due to safety issues related with accidents, some of which were fatalities because of how tight the curve was, and that it is located at the bottom of a 6% grade that is 4½ miles in length. To flatten the curve, the existing hillside must be excavated and the resulting slope stabilized. Though the existing paleo-stream deposits on the slope did not appear to be unstable, they could not meet the minimum factor of safety (FOS) of 1.5 in accordance with Arizona Department of Transportation (ADOT) requirements. The new slope cut into the paleo-stream deposits, would have to be designed to meet the minimum FOS requirement. Existing slope geometry inhibited laying the slope back sufficiently to meet the minimum required FOS, therefore, a slope stabilization system using high tensile steel mesh and grouted bar anchors was chosen from a list of five options to stabilize the slope. This paper will present the other alternatives and their shortcomings, and will provide the advantages and disadvantages, costs and logistics of the high tensile strength steel mesh and grouted bar anchor stabilization alternative.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: pp 317-329
  • Monograph Title: Proceedings of the 66th Highway Geology Symposium (HGS 2015)

Subject/Index Terms

Filing Info

  • Accession Number: 01638281
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 6 2017 11:58PM