Browsing Undergraduate Research by Author "A., Douglas"
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ItemA site-specific geotechnical study of forest drainage ditches in Finland(University of New Brunswick, 1987) Kusnierczyk, David; A., DouglasIn undertaking a forest drainage study near Kemijarvi, Finland, a ditch spacing of 20 metres was proven to be optimal. The water table fluctuation in the soil during one summer was measured across 20, 40, and 60 metre ditch spacings where the ditch excavation was carried out at the beginning of the summer. The soil located at the study site was a eutrophic sphagnum-sedge peat approximately 4.0 metres in depth and the peatland was characterized as a pine bog. Graphical and tabular representations of the raw and compiled data are included as are recommendations for further study. ItemAddendum to filtration properties of forest road filter layers(University of New Brunswick, 1986) Kelly, Michael Andrew; A., Douglas ItemAn analysis of the impact of road roughness on haul truck speed with affects of gradient on haul truck speed and gradient on road roughness for a forest access road in Southern Quebec.(University of New Brunswick, 2000) Cameron, Marcel R.; A., Douglas ItemAn economic comparison of two Swedish first thinning systems in a Scots pine stand (Pinus Sylvestris L.)(University of New Brunswick, 1986) Moberg, Lennart; A., DouglasThe results of an economic comparison of two Swedish thinning systems in the first thinning of a Scots pine (Pinus sylvestris L.) stand is presented. The operation was performed in a 36 year-old stand located 30 km north of Stockholm, Sweden. The conventional thinning system used in Sweden today is associated with a high density of forest trails and difficult physiological working conditions for the cutter. This system was compared with a system designed to improve the biological situation in the stand after the thinning by increasing the distance between forwarding trails and to improve the physiological working conditions for the cutter performing the cutting function by using a thinning roller. The study was to determine if this modified thinning system would be an economically viable alternative to the conventional system. Differences in cost components was also to be determined through a detailed analysis of the working methods used for each system. A time study was carried out for each function in both systems to find the composition of productive work and the productive performance rate in each function. This rate was related to unit costs (industry averages) to find the total cost for each function. The cost of the biological implications of the introduction of clearcut forwarding trails into the stand in each system was found by relating the expected loss in volume and quality to the present value of the wood. The total cost of each system was calculated for three levels of small-scale operations and one company operation. This total cost was found to be between 19-35 SK/m3 (Swedish-kronor-per-cubic-metre-cut) lower for the conventional system. This was mostly due to the extra cost induced by the winching function and, to a much lesser extent, a lower performance rate for the cutting function in the modified system. The difference from these factors, however, was offset by 7 SK/m3 in lower biological costs and about 10 SK/m3 in a lower cost in the forwarding function for this system. Thus, the modified system was found not to be cost-competitive with the conventional system. It has been recommended that a similar study to the one presented in this report be conducted on a system which employs the thinning roIler, extends the traiI spacing used in the conventional system (to 30 m or more), but does not use a winch. ItemAnalysis and synthesis of subgrade stress and strain measurements for single layer unpaved roads(University of New Brunswick, 1996) Mahoney, David C.; R. Douglas; A., DouglasA series of tests were performed at the Transport Research Laboratory in Crowthorne, Berkshire, England for research by Prof. R. Douglas, DC. Campbell Chair in Highway Construction and Pavement Research at the University of New Brunswick. The purpose of these tests was to analyse the subgrade stress and strain response of a single layer unpaved road with the three variables being layer thickness, tire pressure, and wheel load. Rutting on the surface of unpaved roads had been observed after vehicles with inflated tire pressures passed over them. Therefore the initial objective of this report was to place stress and strain gauges in the clay subgrade to check if this rutting was caused by significant stress and strain increases in the subgrade. The other objective was to analyse the effects on the life of a single layer unpaved road by altering the three variables mentioned above. The testing procedures involved using layer thicknesses of 200mm, 350mm, and 560mm, tire pressures of 50psi and lOOpsi, and wheel loads of 45kN and 80kN. The stress and strain gauges were placed in a subgrade of gault clay (common to England) at varying depths. This report outlines the results of the testing and the effects the various combinations have on the life of a single layer unpaved road. The results could prove beneficial to those operating on unpaved roads, specifically in the forestry and mining industries. ItemAnalysis of an existing retaining wall to facilitate a new design(University of New Brunswick, 1995) VanBuskirk, Cynthia; R. Douglas; A., Douglas ItemAssessment of the environmental regulations dealing with watercourse alterations in New Brunswick(University of New Brunswick, 1997) van Loon, Monica G.; Douglas, Robert; A., DouglasWatercourse alterations are any temporary or permanent changes made at, near or to a watercourse or to water flow in a watercourse. They not only involve the physical alterations of the watercourse, they include all activities taking place within a prescribed distance of the bank of any watercourse involving a disturbance of water, soil or vegetation (Watercourse Alterations Technical Guidelines, 1994). The installation and repair of culverts is a common watercourse alteration in New Brunswick. Watercourse alterations are carefully evaluated according to the pertinent environmental regulations. The jurisdiction of the federal and provincial government in the area of environmental legislation is not divided by geographical boundaries. As a result, overlaps and inconsistencies exist in the environmental process. The diversity of the regulations and the different fields of jurisdiction add to the complexity of the process. For engineers, contractors, or others responsible for engineering or construction projects, overlaps or inconsistencies in the environmental process posse a challenge. Failure to comply with any term or condition of approval, licence, permit, registration, determination or exemption issued or granted, or violation of any provisions of the statutes or regulations can result in fines, lost wages, and delay in the work schedule. In relation to watercourse alterations, several initiatives have been implemented to simplify and accelerate the process, such as the introduction of the Provisional Watercourse Alteration Permit. These developments are a clear indication of the need to keep improving the environmental process. The goal of this report is to assess the current environmental process dealing with watercourse alterations, to identify overlaps, gaps and conflicts, and to make recommendations to improve the process. The focus will be on the current policies, technical al guidelines and standards, recommended by the provincial departments in New Brunswick, for the installation and repair of culverts on private, freehold, and crown lands. ItemCase history of a solution to low bearing capacity soils, its success and alternate solutions(University of New Brunswick, 1988) Spence, Coleman R.; A., Douglas ItemCase study using geotechnical fabric to stabilize poor subgrade soil(University of New Brunswick) Harvey, Steven; A., Douglas ItemComparative evaluation of ROADENG© and ROADCALC® for the design of forest access roads(University of New Brunswick, 1994) Rollins, David J.; A., Douglas ItemComparison of road aggregates on Spruce Fall Inc. limits in Northern Ontario(University of New Brunswick, 1999) Badcock, Rod; A., Douglas ItemControlling grain size distribution of aggregate using screw-type washers(University of New Brunswick, 1987) Debly, Louis Raymond; A., Douglas ItemDesign alternative for construction over soft soil near Blackville, N. B.(University of New Brunswick, 1997) Underhill, Ian; A., Douglas ItemDesign and construction of forest access roads(University of New Brunswick, 1990) St. George, D. Seumas; Douglas, R.; A., DouglasF o r e s t a c c e s s roads have been e v o l v i n g over the past t h i r ty y e a r s from crude p o r t a s h roads to heavy duty haul roads. As loads and t r a f f i c d e n s i t y have i n c r e a s e d t h e r e has been a r a p i d ly growing requirement f o r the a p p l i c a t i o n of modern e n g i n e e r i ng methods and procedures. The i n c r e a s i n g loads have c r e a t e d an on going demand for more s t a b l e subgrades and smooth and durable s u r f a c e s . As well geometric requirements based on horsepower demand and safety have been c a l l i n g for longer r a d i u s c u r v e s and f l a t t e r grades. A l l of this w i t h i n the c o n f i n e s of very t i g ht monetary budgets. This has put a t e r r i f i c burden on the f o r e st i n d u s t r y and the optimal r e s o l u t i o n of these problems can only be a c h i e v e d through intense a p p l i c a t i o n of better engineering s t a n d a r d s. ItemDesign of ditch digging blade for clay roads in Northeastern Ontario(University of New Brunswick, 2000) Nielsen, Dirk Rudolf; A., Douglas ItemDesigning and building roads for all terrain vehicles on private woodlots(University of New Brunswick, 2000) Delage, Renée Dominique Michèle; A., Douglas ItemDesigns for an unsurfaced road over peat subgrade using engineering fabric(University of New Brunswick, 2008) Knappe, Jeff M.; A., Douglas ItemDetermining mechanical properties of wood-polymer composite material(University of New Brunswick, 1984) Jones, Richard Todd; A., Douglas