Low-thermal-resistance backfilling method for direct-buried cable

• Main Authors: XIAO MINGJIE, WU GAOBO, LIU SINING, XIANG YU, LUO CHUJUN, WANG RUSONG, LI TIEDING, YUE HAO
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES

The invention discloses a low-thermal-resistance backfilling method for a direct-buried cable. The method comprises the following steps of: 1, uniformly mixing cement and fine sand to prepare a low-thermal-resistance backfill material; 2, excavating a cable direct burial trench, and uniformly laying the low-thermal-resistance backfill material at the bottom of the trench; 3, laying a high-voltage cable, and backfilling the periphery of the high-voltage cable with the low-thermal-resistance backfilling material; and 4, laying a cover plate, and backfilling undisturbed soil around the cable. With the method adopted, the current-carrying capacity of the direct-buried high-voltage cable can be improved, the construction cost of cable engineering is reduced, and safe operation of a cable line is ensured. 本发明公开了一种直埋电缆低热阻回填方法。它包括如下步骤，步骤一：采用水泥和细沙均匀混合配制成低热阻回填材料；步骤二：开挖电缆直埋沟，将低热阻回填材料均匀铺设在沟底；步骤三：敷设高压电缆，将低热阻回填材料回填在高压电缆四周；步骤四：铺设盖板，并回填电缆周围原状土。本发明具有能够提高直埋敷设高压电缆的载流量，降低电缆工程建设成本，保证电缆线路安全运行的优点。