Construction requirements for wire mesh fence

Summarize the construction requirements of various fences

(1) The construction site fence should be implemented as soon as possible after the completion of the roadbed project; the contractor should prepare a detailed construction organization design and submit it to the supervision engineer for review before construction. The contractor shall, according to the approved construction organization design, carry out the construction and lofting according to the requirements of the drawings and the actual topography and features, determine the centerline of the column, carry out the necessary clearing and excavation of the roots to block the slope according to the regular slope and the linear structure. Grid.

 

(2) The burial of the column should be carried out in sections, first burying the columns at both ends, and then pulling the line to bury the intermediate column. From the longitudinal direction, the axis of the column should be on a straight line, and the phenomenon of unevenness should not be presented; from the height point of view, the top of the column should be smooth and should not be in a state of unevenness.

 

(3) If there is a break in a row of barriers or at a road intersection, the distance of the column may be properly adjusted as needed. When crossing the river, when the width of the river is not more than 6m, it should be connected as shown in the drawings or with barbed wire; when the width of the river is greater than 6m, the barrier should be closed and closed.

 

(4) When the drawings require that the columns, supports or anchor heads be buried in the concrete roots, the contractor shall provide the necessary temporary cables or supports to hold the columns in place until the concrete hardens. During the 7-day period of concrete maintenance, no material or parts should be installed or tensioned on the columns, cables and supports. All columns shall be laid vertically in accordance with the drawings and vertical lines.

 

(5) Barrier meshes of the size and type conforming to the requirements shall be made from the end of the column to the hook of the column according to the rules of the drawing rules; or the mesh device shall be placed in the structure, and the structure and the column shall be firmly connected. All mesh and wire should be tight and not deformed, and the height of the device should conform to the drawing rules. After the barrier device is completed, the bottom of the column needs to be compacted.

 

(6) Where the high-voltage transmission line passes through the barrier of the device, the barrier grid shall be connected to the ground wire according to the rules of the power department.

 

(7) When the wires are parallel or close to the barrier grid and the wires are above the barrier grid, the ground wire should be buried at each end or at a distance of not more than 400 m. The grounding resistance is less than 10 Ω (ohms).

 

(8) The barrier grid should generally be placed along the terrain. If necessary, geotechnical leveling is required to achieve a neat appearance. In the low-lying areas, when the vertical profile of the local area changes suddenly and the ruled ground height cannot be maintained, a longer column can be used, and then a plurality of barbed wires are pulled. The vertical clearance between the barbed wire is equal to or less than 150 mm. After excavation or drilling, all columns shall be buried as approved. Generally, the column should be slanted on both sides of the column every 100m to ensure its stability; the barrier should be set in a direction of change, and the column should be provided with three-way diagonal support.