新建线路宜采用同塔双回架空架设。在线路走廊特别紧张地区，可建设同塔多回

Newly-built lines should adopt double-circuit overhead erection on the same tower. In areas where the line corridors are particularly tight, multiple overhead lines (including mixed pressure) can be built on the same tower. In narrow sections where angle steel towers cannot be erected, the lines can be erected with steel pipe poles. <br>The cable route in the urban area should be arranged uniformly with other underground pipelines in the city. The width and depth of the passage should consider the requirements of long-term development. The laying of cables should consider the requirements of safety, convenient maintenance and saving investment. The cable laying method should be determined based on the voltage level, the final number of circuits, construction conditions and initial investment and other factors, and the corresponding laying methods can be adopted according to different situations [13]. <br>The selection of the transmission line path plan should be based on the basic principles of overall planning and mutual coordination, and be determined according to the following specific principles:

The new line should be set up with the same tower double back overhead. In areas where the route corridor is particularly tense, the same tower can be constructed with the Tower back overhead line (including mixed pressure). In narrow sections where the corner steel tower cannot be erected, the line may be set up with a steel pipe rod.<br>The urban cable line path should be arranged uniformly with other underground pipelines in the city. The width and depth of the channel should take into account the requirements of long-term development. Cable laying should take into account safety, maintenance convenience and investment savings. Cable laying method should be combined with voltage level, the final number of circuits, construction conditions and initial investment and other factors to determine, according to different circumstances can be adopted the corresponding laying method.<br>The choice of transmission line path scheme should be based on the basic principles of overall planning and coordination, and be determined by the following specific principles:

The new lines should be erected overhead with double circuits on the same tower. In areas where the line corridor is particularly tight, multi circuit overhead lines (including mixed voltage) on the same tower can be built. In the narrow section where the angle steel tower cannot be erected, the line can be erected with steel pipe pole.<br>The urban cable route should be arranged with other underground pipelines in the city. The width and depth of the passage should consider the requirements of long-term development. The cable laying should consider the requirements of safety, convenient maintenance and saving investment. The cable laying method should be determined by combining the voltage level, the number of final circuits, construction conditions and initial investment, and corresponding laying methods can be adopted according to different situations [13].<br>The selection of transmission line route scheme should be based on the basic principles of overall planning and mutual coordination, and determined according to the following specific principles:<br>