Location
Arlington, Virginia
Date
14 Aug 2008, 4:30pm - 6:00pm
Abstract
The natural river processes along a 30 m high riverbank of one of the largest tributaries to Lake Superior cause periodic landslides. After arresting toe erosion, local authorities needed to protect the infrastructure at the crest from further damage as the slope continued to flatten towards its long-term angle of repose. A long-term hazard management strategy was applied using the cautionary zone approach (CZA). Design criteria included a target safety factor, no construction impacts, no maintenance and a 75-year design life. The solution drew from 3 technologies: soil nails, laterally loaded piles and biotechnical stabilization. Steel nails, 35 mm diameter, were designed in bending perpendicular to slip surfaces and installed on a 1 to 1.5 m grid. Lightweight equipment working on the slope installed the 4 to 12 m long nails very rapidly without drilling or grouting. For shallow flow slides around a rigid nail, plate heads were added. A facing of roots controlled soil movements between nails and provided a natural look with the system completely out of sight. Three years of performance monitoring data are presented, and confirm a successful case history. This paper describes an innovative approach used to stabilize a landslide prone area in an urban environment.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
6th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2008 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Fabius, Michael; Bo, Myint Win; and Villegas, Bernardo, "Stabilization of a 30 m High Riverbank in Canada with Nails, Plates and Roots" (2008). International Conference on Case Histories in Geotechnical Engineering. 51.
https://scholarsmine.mst.edu/icchge/6icchge/session02/51
Stabilization of a 30 m High Riverbank in Canada with Nails, Plates and Roots
Arlington, Virginia
The natural river processes along a 30 m high riverbank of one of the largest tributaries to Lake Superior cause periodic landslides. After arresting toe erosion, local authorities needed to protect the infrastructure at the crest from further damage as the slope continued to flatten towards its long-term angle of repose. A long-term hazard management strategy was applied using the cautionary zone approach (CZA). Design criteria included a target safety factor, no construction impacts, no maintenance and a 75-year design life. The solution drew from 3 technologies: soil nails, laterally loaded piles and biotechnical stabilization. Steel nails, 35 mm diameter, were designed in bending perpendicular to slip surfaces and installed on a 1 to 1.5 m grid. Lightweight equipment working on the slope installed the 4 to 12 m long nails very rapidly without drilling or grouting. For shallow flow slides around a rigid nail, plate heads were added. A facing of roots controlled soil movements between nails and provided a natural look with the system completely out of sight. Three years of performance monitoring data are presented, and confirm a successful case history. This paper describes an innovative approach used to stabilize a landslide prone area in an urban environment.
