An apparatus to measure the crosscut shearing strength of roots
نویسندگان
چکیده
ZI E M E R, R. R. 1978. An apparatus to measure the crosscut shearing strength of roots. Can. J. For. Res. 8: 142-144. Loss of tree root strength after timber cutting is a principal mechanism leading to slope failure and landslides. Measurement of root shear strength changes can be useful in evaluating effects of logging on slope stability. The simple apparatus described measures shear strength directly on roots up to 50 mm diameter. Tests on live roots showed excellent correlation between measurements of shear strength and tensile strength.
منابع مشابه
تعیین اثر ریشه درختان پده و گز بر مقاومت برشی خاک ساحل کارون در محل
Downslope soil movement along riverbanks is a significant erosion process. Plant roots, particularly of woody vegetation, apparently stabilize soil on slopes because in most areas where the vegetation is removed, frequent bank failure occurs. Plant roots increase soil-shearing resistance both directly by mechanical reinforcement and indirectly through removal of pore water by transpiration. In ...
متن کاملتعیین اثر ریشه درختان پده و گز بر مقاومت برشی خاک ساحل کارون در محل
Downslope soil movement along riverbanks is a significant erosion process. Plant roots, particularly of woody vegetation, apparently stabilize soil on slopes because in most areas where the vegetation is removed, frequent bank failure occurs. Plant roots increase soil-shearing resistance both directly by mechanical reinforcement and indirectly through removal of pore water by transpiration. In ...
متن کاملAn experimental study of axial load transfer mechanisms of cable bolts using axially split embedment apparatus
The load transfer mechanisms of cable bolts differ from those for normal rebar bolts. The cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way they are laid. Tendon bolts (rebar and cable) are normally evaluated for their strength and load transfer properties. The tendon strength can be evaluated by the tensi...
متن کاملAnalytical and Numerical Investigation of Significant Parameters on Strength of Electromagnetically Assembled Aluminum Tube Joints
Electromagnetic forming is a high energy rate forming process in which an electromagnetic Lorentz body force is used for deformation of products. In this article, electromagnetic forming process was simulated for the assembly of parts as an innovative method. The effect of important process parameters such as discharge energy, radius and width of rectangular groove on the strength of the asse...
متن کاملAnalytical and Numerical Investigation of Significant Parameters on Strength of Electromagnetically Assembled Aluminum Tube Joints
Electromagnetic forming is a high energy rate forming process in which an electromagnetic Lorentz body force is used for deformation of products. In this article, electromagnetic forming process was simulated for the assembly of parts as an innovative method. The effect of important process parameters such as discharge energy, radius and width of rectangular groove on the strength of the asse...
متن کامل