Index Catalog // ScholarsArchive@OSU

Load bearing capacity of alder, spruce and hemlock tail trees

Creator:: Pugh, Edwin V.
Abstract:: This paper presents an evaluation of the cable loading support capacity of red alder, Alnus rubra Bong., Sitka spruce, Picea sitchensis (Bong.) Carr, and western hemlock, Tsuga heterophylla (Raf.) Sarg., tail trees. Capacity is measured in terms of combined stress resulting from compression and bending, rather than the traditional methods...
Resource Type:: Capstone Project

Load-deformation characteristics of multiple stump anchor systems

Creator:: Toupin, Richard C.
Abstract:: This paper documents the development of a model which determines multiple stump anchor system displacement as a response to skyline load for four anchor rigging configurations: 1. Series multiple, 2. Tieback, 3. Elevated tieback, and 4. Equalizer block. It also documents the field testing of four two stump anchors rigged...
Resource Type:: Capstone Project

Laboratory investigation of the mechanics of raveling soils

Creator:: Saunders, George P.
Abstract:: Oregon's forestry industry has and will continue to be a vital component of Oregon's economy, with twenty-two percent of Oregon's 1986 gross state product and thirty-nine percent of Oregon's 1986 gross manufacturing product related the forestry goods. An integral component to proper management of Oregon's forestry lands is Sustaining the...
Resource Type:: Masters Thesis

An investigation of the influence of root reinforcements on soil strength and the initiation of static liquefaction in forest soils

Creator:: Smith, Russell S.
Abstract:: A study was conducted to investigate the influence of root reinforcements on soil strength and the initiation of static liquefaction in forest soils. The design and operation was developed of an apparatus capable of modeling rainfall-induced shallow hill-slope failures that also permitted observation of the soil volume change tendencies at...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: Marvin R,'yles A study was conducted to investigate the influence of root

Modelling root reinforcement in shallow forest soils

Creator:: Skaugset, Arne E.
Abstract:: A hypothesis used to explain the relationship between timber harvesting and landslides is that tree roots add mechanical support to soil, thus increasing soil strength. Upon harvest, the tree roots decay which reduces soil strength and increases the risk of management -induced landslides. The technical literature does not adequately support...
Resource Type:: Dissertation

The short term temporal and spatial variability of nitrogen and phosphorus in two Oregon Coast Range streams

Creator:: Scherer, Robert A.
Abstract:: High intensity sampling was undertaken to characterize the temporal and spatial variability of oxidized nitrogen (NO3-N + NO2-N), ammonia-nitrogen (NH3-N), total dissolved phosphorus, total unfiltered phosphorus and orthophosphorus (PO4-P) from two adjacent small streams in Western Oregon's Coast Range, Deer Creek (303 ha) and Flynn Creek (203 ha). Deer Creek...
Resource Type:: Masters Thesis

Mechanics and movement of the Lookout Creek Earthflow

Creator:: Mills, Keith A.
Abstract:: The Lookout Creek Earthflow is located in the Cascade Mountain Range in western Oregon. The Cascade Mountains are mainly volcanic in origin, and deposits in and around the slide have a complex geomorphic history,, affected by glacial, mass movement, and fluvial processes. The currently moving land mass is about 1600...
Resource Type:: Masters Thesis

Test procedures for low-confining stress, multistage triaxial testing of compacted cohesive soils

Creator:: Kliewer, Julie E.
Abstract:: The use of the triaxial test to characterize the strength of soils for civil engineering applications is widespread. These tests are typically conducted with confining stresses in excess of 5 psi. To characterize the strength of a soil located in the upper layers of the subgrade of an aggregate surfaced...
Resource Type:: Masters Thesis

Peakflow causative mechanisms and frequencies at Reynolds Creek, southwestern Idaho

Creator:: Kirkham, Tracie
Abstract:: Peakflow frequency analysis is used in forest hydrology for designing stream crossing structures such as culverts and bridges. The traditional approach to frequency analysis is based on the assumption that the observed sample of peakflows represents a homogeneous population. It is not clear if using the "homogeneous" population of the...
Resource Type:: Masters Thesis
Full Text:: Reynolds Creek, Southwestern Idaho. Abstract Approved: ---------~~--~--------Marvin R. Pyles Peakflow

Mechanical stresses in trees resulting from strain compatibility in an anisotropic material

Creator:: Lyons, Charles Kevin
Abstract:: Consider the bole of a tree to consist of a linear elastic material that is orthotropic with respect to the cylindrical coordinates. When the bole of a tree is subjected to resultant loads in the directions of the Cartesian base vectors, the S₁₁, S₂₂, S₃₃, and S₁₂ stresses in Cartesian...
Resource Type:: Dissertation

ScholarsArchive@OSU

Load bearing capacity of alder, spruce and hemlock tail trees

Load-deformation characteristics of multiple stump anchor systems

Laboratory investigation of the mechanics of raveling soils

An investigation of the influence of root reinforcements on soil strength and the initiation of static liquefaction in forest soils

Modelling root reinforcement in shallow forest soils

The short term temporal and spatial variability of nitrogen and phosphorus in two Oregon Coast Range streams

Mechanics and movement of the Lookout Creek Earthflow

Test procedures for low-confining stress, multistage triaxial testing of compacted cohesive soils

Peakflow causative mechanisms and frequencies at Reynolds Creek, southwestern Idaho

Mechanical stresses in trees resulting from strain compatibility in an anisotropic material

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