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How to lay the direct buried cable?

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1. Buried depth.
Because the direct buried optical cable is directly buried under the ground, it must be at a certain distance from the ground. The cable should not be damaged by the tension of the ground. At the same time, the optical cable should not be frozen.

2. Cleaning and backfilling of cable trenches.
The bottom of the ditch should be flat, and there are no debris such as gravel and hard clods that hinder the laying of the cable. If the groove is stone or semi-stone, the bottom of the ditch should be padded with 10 cm thick fine soil or sand and flattened. After the cable is laid, 30cm thick fine soil or sand should be backfilled as a protective layer. It is strictly forbidden to mix gravel, bricks and hard clods into the protective soil layer. The protective layer should be gently leveled by hand.

3. Cable laying.
When laying optical cables or cables in the same trench, they should be laid separately during the same period. If it is laid in the same trench as the direct buried cable, the cable should be laid first, then the optical cable should be laid and arranged in parallel at the bottom of the trench. If the cable is laid in the trench, it should be placed separately at the same time, and the bottom of the trench should not be crossed or overlapped. The cable should be placed flat on the bottom of the trench or bent naturally to release the cable stress. If it is bent or arched, it should be leveled, but it must not be rigid.

4. Carry out the logo.
Marks should be placed at the joints, turning points, reserved lengths or intersections with other pipelines of direct buried cables for future maintenance. The sign can use either an authoritarian logo or a permanent building near the cable to measure the distance between a part of the building and the cable and record it for inspection.