2019
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04
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16
Cable laying and selection
I. Cable layingIn the wiring project, the common laying methods of cables mainly include direct burial laying, pipe laying, shallow trench laying, cable trench laying, cable tunnel laying, and overhead laying. These laying methods have their own advantages and disadvantages. Which ones need to be applied in actual construction depends on factors such as building density, cable line length, number of required cables and surrounding environment.In terms of construction difficulty, cable tunnel laying and cable trench laying are more convenient for construction and maintenance and later maintenance work. Many developed cities have adopted public tunnels for planning and construction. The public tunnel reduces the number of repetitive investments and the inconvenience caused by repeated excavation of the road. However, due to the high investment cost in the early stage, the development of such laying methods in China has been blocked and used less.Relatively speaking, direct burial and sha...