Key Points for Construction of Outdoor Direct-Buried Optical Cables: These Details Determine Project Quality

Outdoor direct-buried optical cables are widely used in long-distance trunk lines, urban access networks, industrial special environments and other scenarios due to their high strength, corrosion resistance and anti-external force damage characteristics. Although direct burial laying has the advantages of low cost and flexible construction, it is greatly affected by terrain and environment. Many details in the construction are directly related to the project quality and later operation and maintenance costs, which must be strictly controlled.

Route survey is a key link in the early stage of construction. It is necessary to avoid underground pipelines and obstacles and mark them in complex terrain areas. The burial depth standard must be strictly followed: the burial depth under the carriageway is not less than 0.8 meters, and that under the sidewalk is not less than 0.6 meters. Special areas need to be deepened and protected pipes installed. During the laying of optical cables, the traction force should be controlled to avoid exceeding the allowable range and causing fiber damage. At the same time, sufficient slack should be reserved for later maintenance. The backfilling link needs to be compacted in layers, and warning tapes should be laid to remind subsequent construction. The joint box should be installed at a higher terrain and properly waterproof and sealed. In addition, the test and acceptance after construction cannot be ignored. Use OTDR to detect and ensure normal optical cable attenuation, and establish a complete route file to facilitate later operation and maintenance.

The core of direct-buried optical cable construction is "prevention of damage, water ingress and injury". The control of every detail can lay the foundation for stable operation in the later period.