Soil nailing for highway construction and maintenance in Ontario

Tae-C Kim, Stephen Lee, Jinyuan Liu

In the proceedings of: GeoRegina 2014: 67th Canadian Geotechnical Conference

Session: Transportation Geotechnics

ABSTRACT: This paper presents a state-of-the-practice report on the development of soil nailing technique and a prospective review for its applications in the highway construction and maintenance in Ontario, Canada. Soil nailing is a passive reinforcing technique where the stability of a soil mass is reinforced by mobilizing mainly the pullout contribution of regularly spaced nails inserted in the soil mass when there is a ground movement. Among various construction techniques, the drilled-and-grouted soil nail is the most popular soil nailing in practice. Soil nailing has been successfully applied in different ground conditions around the world since its inception four decades ago. Related to highway construction, soil nailing has been applied in many cases, including new road cut support, existing road widening, repairing of existing retaining structures, and reinforcing unstable slopes. Given the vast land of Ontario and existence of favorable ground conditions, it is expected that soil nailing will become a very popular reinforcing system in the near future in Ontario. The easy set-up of plant and mobility of soil nail equipment is extremely attractive for highway development and maintenance or repair work in remote areas, particularly in Northern Ontario. A total of more than three hundred design codes, guidelines, research articles, and case histories have been collected for this study. The new developments of risk categories, reliability-based design, and new facing types will be discussed in this paper. In summary, soil nailing is a very promising technique and will have a bright future for infrastructure development in Ontario. RÉSUMÉ Cet article présente un rapport d'état de la pratique sur le développement du sol clouage technique et une étude prospective de ses applications dans la construction de la route et d'entretien en Ontario, au Canada. Clouage des sols est un passif renforcement technique où la stabilité d'un sol masse est renforcée en mobilisant principalement la contribution de l'arrachement des clous espacés régulièrement insérés dans la masse du sol lorsqu'il y a un mouvement de terrain. Parmi les différentes techniques de construction, le clou du sol foré et jointoyé est le plus populaire du sol clouage dans la pratique. Clouage des sols a été appliquée avec succès dans des conditions de sol différents partout dans le monde depuis sa création il y a quatre décennies. Liés à la construction de l'autoroute, clouage des sols a été appliquée dans de nombreux cas, y compris la nouvelle route de réduire le soutien, existant route élargissement, la réparation de structures de soutènement existantes, renforcer les pentes instables. Étant donné les vastes terres de l'Ontario et les disponibilités des conditions favorables diversement au sol, il est prévu que le clouage des sols deviendra un système très populaire qui se renforcent dans un proche avenir en Ontario. L'installation facile de la plante et de la mobilité du matériel ongle sol sont extrêmement attractifs pour l'aménagement routier et de travaux de maintenance ou de réparation dans des régions éloignées, particulièrement dans le nord de l'Ontario. Un total de normes de conception de plus de trois cents, lignes directrices, recherche articles et histoires de cas ont été rassemblés pour cette étude. Les nouveaux développements des catégories de risque, la conception basée sur la fiabilité et nouveau face à types seront discutés dans cet article. En résumé, le clouement de sol est une technique très prometteuse et aura un bel avenir pour le développement de l'infrastructure en Ontario. 1 INTRODUCTION Soil nailing technology is evolved from rock bolting technique in tunnelling and has been developed for approximately four decades. One of its first field applications was actually reported in Vancouver, Canada in 1969 (FHWA 1998). Soil nailing is a passive reinforcing technique where soil nails contribute to the stability of a slope only when there is a ground movement. Among various construction techniques, the drilled-and-grouted soil nail is the most popular construction method. Soil nailing has been successfully applied in various ground conditions around the world. Due to its cost-effectiveness and satisfactory performance, it has gained popularity in many parts of the world, including Western Canada. Related to highway construction, soil nailing has been applied in many areas, including new road cut support, existing road widening, and reinforcing unstable embankments. However, it is not a popular system in Ontario. Given the vast land of Ontario and existence of favorable ground conditions, it is expected that it will become a very popular reinforcing system in the future. Based on a collection of over three hundred related reports and articles, this paper presents a state-of-the-practice report on the development of soil nailing and

RÉSUMÉ: nailing for highway construction and maintenance in Ontario

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Cite this article:
Tae-C Kim; Stephen Lee; Jinyuan Liu (2014) Soil nailing for highway construction and maintenance in Ontario in GEO2014. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GeoRegina14Paper332,author = Tae-C Kim; Stephen Lee; Jinyuan Liu,title = Soil nailing for highway construction and maintenance in Ontario,year = 2014}