How to avoid the underground construction of the cable?
Construction cut off the cable, underground pipes, gas pipe situation have occurred. How to know the exact location of the underground cable, to avoid these losses? State Grid Hangzhou power company spent a year studying a new technology that can achieve the precise positioning of underground pipelines, cracked the cable pipeline detection problems.
This technology is the first to be used at Zijing tunnel construction site of Zijingang Road. Yesterday morning, State Grid Hangzhou Power Supply Company cable operators to use this technology to determine the precise location of the power cables involved in the construction of the tunnel.
Where is the cable buried, is there no file in the power department can check it? Power department technical staff explained that before the national standard allows the laying of the cable when the error, the error value of 10% -15% can be. Therefore, the most accurate location of cable laying, we must use technical means to find out.
The original cable detection equipment and methods used are relatively simple technology, only to solve some of the relatively simple cable detection is not too deep, deep trenchless cable pipe for precise positioning there is no way. Therefore, last year, Hangzhou Power Company focused on research and development of trenching cable pipeline detection technology projects.
The Purple Tunnel just passes through the underground cable, so the power department needs to measure the exact location of the cable line, buried depth, and so on. "After the implementation of the project, some of the cable trenchless pipeline route clearer to ensure that the construction of the pipeline completely away from the trenched cable pipeline to reduce the occurrence of external damage." Introduction of field technicians, before the probe cable needs about a week Time, a variety of technical means are used, not accurate. Now it takes about half a day to a day, very precise, and it feels like taking a "X" light on the cable.
Utilizing the research results of this project, Hangzhou Electric Power Company will reduce the detection error within 25cm, avoid 220kV pipeline migration and directly save 21.56million RMB. Up to now, the economic benefits directly generated by the technology reached 48.98 million yuan.
At present, Hangzhou Company has sorted out the exact location of 164 undivided cable lines, established the "four-dimensional" information archives of each section of pipelines, and accurately displayed the trend of underground cables of 35-220 kilovolts in 124.75 kilometers. The preliminary construction covers 81 underground cables The "X-ray" file. Using the archiving information, we have discovered and avoided potential safety hazards of ground breaking near 25 cable jacking pipes.
It is understood that due to its versatility of pipeline detection technology, this detection method is not only common in the power industry, but also applicable in industries such as communications, water supply, gas and sewage, and is of great significance for promoting the process of digital urban construction.
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