Forest operations across Canada are encountering increasingly difficult road conditions and more frequent access interruptions related to wet and weak road sections. Resource roads are considered a liability by many forest companies and their business model has been to create the lowest cost, lowest standard, resource road network possible that also will provide tolerable levels of access (i.e., some but not too many failures and hauling disruptions). Increasingly difficult operating conditions and frequent access interruptions, however, drive up costs and threaten the economic sustainability of forest operations.
Starting in 2017, FPInnovations has launched a project to provide its members with techniques and strategies that will offer more reliable and strong road sections and reduce overall road costs. A state-of-practice survey of FPInnovations members provided researchers with a comprehensive understanding of conventional means of responding to wet, weak road conditions in Canada. The report summarizes the responses to wet, weak resource road sections that were identified in the state-of-practice survey and provides an overview of the chief causes and related site indicators for wet, weak road conditions.
Recommended best practices are provided for a variety of conventional industry responses to wet, weak road sections. These address common misconceptions and knowledge gaps that reduce the effectiveness and increase the overall cost associated with the industry responses. These best practice recommendations were based upon findings from a literature review, product manufacturer information, and from researcher expertise.
The report also considers improvements to conventional practices, and advanced solutions that are potentially more effective and economic than the state-of-practice but are not widely exploited by industry. Eleven potential solutions from these two categories were compared and ranked in order of potential. The practice improvements selected for further study were soil compaction, and corduroy and access mats. The advanced solutions selected for further study were geosynthetics that offer both soil reinforcement and enhanced drainage, geocells, and TPCS, a technology to improve truck road-friendliness. Starting in 2021, FPInnovations will initiate field trials and life cycle cost analyses of these technologies.
This guide provides users with easy to use charts to assist with the design of geosynthetic-reinforced unpaved roads over weak soils. It permits the estimation of key input parameters through simple procedures and judgment based on experience. Further optimization of designs may however be possible through detailed calculations and lab testing which are encouraged
Ce guide propose des graphiques simples d’utilisation afin d’aider les utilisateurs dans la conception de routes non revêtues renforcées avec des géosynthétiques. Il permet d’estimer les principaux paramètres d’entrée à travers des procédures
simples et le recours au jugement découlant de l’expérience. Lorsque possible, le recours à des essais en laboratoire est préconisé pour l’obtention de certaines données d’entrée.