Forest Road Pavement Design in New Zealand (2009)

Type of Content
Conference Contributions - PublishedPublisher
University of Canterbury. School of ForestryCollections
Abstract
The New Zealand forest industry currently has an annual cut of 19 million m3 that is expected to increase over the next decade to 30 million m3 per year. Much of the new production is situated in first-rotation forests that are located on steep terrain and have minimal existing forest road networks. A survey conducted as part of this study identified that current road engineering practices vary widely between forest owners and that forest road construction owes more to the experience of roading supervisors than to formal design methods, qualifications and training. While the economical design of forest roads is affected by many factors, including: road location and surveying, geometric design, and construction and maintenance, the acquisition and placement of aggregates for pavement can contribute 60- 70% of forest road cost. The majority of forest owners use a single ‘improved’ aggregate layer to complete their forest road, as opposed to a multi-layered approach used for most public roads. This paper focuses on reviewing the aggregate grading standards available for forest road design, and notes there is considerable variation between standards. A series of eight aggregates actually used for East Cape forest road construction were analysed by sieve test and compared to the standards. It found that the aggregates had widely varied gradation and were dissimilar to the gradation envelopes of the reviewed standards. Further research is required to determine an aggregate grading standard that will best suit East Cape aggregate sources and conditions.
Citation
Fairbrother, S., Visser, R., McGregor, R. (2009) Forest Road Pavement Design in New Zealand. Kins Beach, CA, USA: 32nd Annual Meeting of the Council on Forest Engineering (COFE 09), 15-18 Jun 2009. 8pp.This citation is automatically generated and may be unreliable. Use as a guide only.
Related items
Showing items related by title, author, creator and subject.
-
Reducing sediment loading impacts through improved stream crossing design on forest roads
Brown, K.R.; Visser, R. (University of Canterbury. School of Forestry, 2015) -
Evaluating the potential for sediment delivery at forest road-stream crossings in New Zealand
Brown KR; Visser R (2016)Forest road-stream crossings can represent a significant pathway for sediment delivery to streams. Careful planning of road location, stream-crossing design and implementation of best management practices (BMPs) for ... -
On the design of Len Lye’s harmonic sculptures at the largest feasible size
McGregor, Angus (2021)“I don’t expect to see this sort of thing done in my lifetime, but the directions are there and when we’re ready to get around to it – go ahead. Don’t let me stop you!”-Len Lye [3] Len Lye (1901 - 1980), born in ...