| Summary: | 碩士 === 國立屏東科技大學 === 土木工程系所 === 102 === Metal wire mesh is commonly practice for river bank protection, rock fall protection, and slope stabilization applications. Currently, the use of wire mesh for river bank protection and slope stabilization applications is more than 15 million square meters. Only the materials cost is more than 20 billion New Taiwan dollars. Currently, the replacement of wire mesh for these applications is too often. To develop a better mechanism to construct metal wire mesh is an important task.
The early age hand-made fourth-twisted hexagonal wire meshes were observed to be more durable than those current machine made triple-twisted hexagonal wire meshes. Therefore, the objective of this study is to study a better structural pattern and connection mechanism to produce durable hexagonal wire mesh.
Triple-twist and fourth-twist model hexagonal wire mesh panels were used to evaluate the tensile behavior of the test samples with or without one cut at the center of the test wire panels. The panels were oriented either parallel or perpendicular to the twist wire sections. Tensile tests were also conducted for panel to panel connection using binding-joint and twist-joint. ASTM A975 test procedure was used in the study. The mesh panels were constructed with metallic coated 4.0 mm steel wire with 12cmx15cm mesh opening. The results of the study indicated that the ultimate tensile strength for triple-twist or fourth-twist hexagonal wire mesh panel was similar for uncut conditions. However, the fourth-twist hexagonal wire panels showed better tensile resistance and less elongation after the wire cut at center of the panel for tensile tests conducting in both longitudinal and transverse directions. Tensile strength for the panels oriented in the direction parallel to the twist wire section was greater than those placed perpendicular to the twist wire section. Twist joint showed better tensile resistance than that for binding joint.
Keywords: hexagonal wire mesh, gabion, river bank protection, slope stabilization, rock-fall protection.
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