1. Optical cables laid in the same groove shall not cross or overlap, and should be pulled separately and laid at the same time. fibconet.com
fiber home dwdm
fiber home dwdm
2. The laying of direct buried optical cables shall meet the following requirements:
1) The depth of the optical cable trench should meet the regulations, and the bottom of the trench should be flat without gravel; the bottom of the stony or semi-stony trench should be covered with 10 cm thick fine soil or sand;
2) Ground pulleys should be used for mechanical traction;
3) When lifting and placing manually, the optical cable should not be bent less than the specified radius of curvature, mopping the floor, and pulling too tightly;
4) The optical cable must be laid flat at the bottom of the trench, and must not be vacated and arched;
5) Optical cable laying or treatment according to the design requirements;
6) During the laying process or after laying, the outer skin of the optical cable should be checked in time, and if it is damaged, it should be repaired immediately; after the direct buried optical cable is laid, the insulation resistance of the optical cable sheath to the ground should be checked;
7) The optical fibers and copper wires in the optical cable must be checked and confirmed to meet the quality acceptance standards before the full trench can be returned to the soil. fibconet.com
fiber home dwdm
fiber home dwdm
3. The backfill soil of the optical cable trench should meet the following requirements:
1) Backfill 15 cm thick broken soil or fine soil first, it is strictly forbidden to push stones, bricks, frozen soil, etc. into the ditch, and should be leveled manually;
2) The backfill should be 10 cm above the ground. fibconet.com
fiber home dwdm
fiber home dwdm
4. The anti-jamming measures of the buried optical cable should be in accordance with the design regulations and meet the following requirements:
1) When the optical cable line passes through the railway and the road without excavation, the pipe jacking method should be adopted. The pipe jacking should be kept straight. The specification and position of the steel pipe should meet the design requirements. The position where the ground is allowed to be broken can be protected by pipe, pipe jacking or buried protection. The orifice of the pipe should be blocked.
2) When the optical cable line crosses the mechanized road, the rural road, the urban area, the residential area or the easy-moving land section, it should be constructed according to the protection method required by the design. When laying red bricks above the optical cable, 20 cm thick crushed soil should be covered first, and then red bricks should be laid vertically.
3) When the optical cable line passes through the trenches, canals and ponds with dredging and dredging for fertilizer, the top of the optical cable should be covered with cement boards or cement sandbags for protection.
4) When the optical cable passes through the ditch and terrace of more than 0.8 meters (including 0.8 meters), slope protection should be used, and the slope protection method should be according to the design requirements. When crossing the ditch below 0.8 meters, unless there are special requirements for design, generally no slope protection is required, but it must be rammed and restored to its original state.
5) When the optical cable line crosses the termite activity area, it should be treated with termite prevention according to the regulations.
6) Lightning protection measures for optical cable lines must be handled in accordance with design regulations. When lightning protection drainage lines are used, single or double drainage lines should be laid 30 cm above the optical cables; when the optical cables are dug out after backfilling and re-laying, it is necessary to strictly check whether the drainage lines are located above the optical cables. An inversion occurs. fibconet.com
fiber home dwdm
fiber home dwdm
