"Electric power Tiejun" helps power relocation of Fuzhou Xiamen high speed railway to realize the future of Xiamen high speed railway entering Beijing

This is a high-speed railway with a speed of 350 kilometers per hour, an important channel of "eight vertical and eight horizontal" southeast coastal high-speed railway, realizing Xiamen's "high-speed railway to Beijing" in the future. A 6031 a 6031? This is a group of "power Iron Army" struggling in the front line of construction, shouldering the arduous mission of the "belt and road" key projects, overcoming difficulties, day and night.

? On September 30, 2017, the construction of Fuzhou Xiamen high speed railway was officially started. As the first cross sea high speed railway in China, the project volume is huge, and there are also a large number of power relocation projects. Across the four districts outside Xiamen Island, the power relocation of Fuzhou Xiamen high speed railway involves 24 projects of high-voltage power line relocation, 60 projects of 10kV and below. In front of us are mountains of difficulties and dangers: heavy tasks, tight construction period and difficult construction coordination. In the face of the test, State Grid Xiamen power supply company took the initiative to face the difficulties, made full efforts to coordinate with various parties, carefully organized the construction scheme, strictly and carefully carried out the safety risk prevention and control, and took multiple measures to achieve the project acceleration, demonstrating a strong combat effectiveness.

? Up to now, 7 high-voltage power relocation projects and 1 civil engineering project have been completed for Fuzhou Xiamen high speed railway, another 3 civil engineering sites are under construction, 34 low-voltage projects and 18 on-site construction. Starting from January 2019, the battle has made high-quality and efficient progress and is still in full swing. A 6031 a 6031? A 6031 a 6031 is a part of the Beijing Fuzhou Xiamen high-speed railway passenger transport channel, which is also a high standard passenger transport link between the Yangtze River Delta and the Pearl River Delta through the West Bank of the Straits. The Fuzhou Xiamen high-speed railway, from the moment of construction, will affect the hearts of people in the coastal areas.

? It passes through Haicang, Jimei, Tong'an and Xiang'an. The Xiamen section of Fuzhou Xiamen high speed railway is 45.59km long in total. The power relocation involves 84 main distribution lines and one substation. Among the four areas involved in Xiamen, there are 24 35kV and above relocation projects, 3 in Haicang, 8 in Jimei, 9 in Tong'an and 4 in Xiang'an. "The power relocation project of Fuzhou Xiamen high speed railway has a wide range of points. Each node is related to the construction progress of the high speed railway. The construction amount, span and coordination amount are far more than the previous power relocation projects." Such a "hard bone" made Huang Shunan, the manager of the high-voltage power relocation project of Fuzhou Xiamen high speed railway, difficult.

? Right inside, construction difficulty and power failure are imminent. "The geology of Xiamen is soft. The Xiang'an section was constructed in rainy season at the beginning. The environment for road breaking construction is poor and difficult. There are still traffic conditions nearby, and there are many obstacles when starting." Huang Shunan said that the power relocation construction section often intersects with the high-speed rail construction or residential area, and multiple construction sites operate at the same time, so it is necessary to reasonably arrange the power outage to reduce the impact on the outside world.

? External, land acquisition difficulties and approval coordination are more anxious. The electric power relocation of Fuzhou Xiamen high speed railway involves four areas outside Xiamen Island, and the difference of promotion strength leads to uneven land acquisition speed, as well as the problems of railway, high-speed and oil-gas pipeline crossing. Traffic modification, green relocation and crossing construction shall be coordinated one by one and approved according to the process. Only the external communication link needs to deal with more than ten departments. A 6031 a 6031? Overcoming difficulties and flexibly responding to emergencies a 6031 a 6031? "Geological problems and land exchange process are two major problems that take the longest time." Standing at the construction site of Xiangan 220kV gangnei I and II circuit project, Huang Shunan recalled the details of power relocation and construction. He said: "the good thing is that the method is more difficult than the method."

? That's the construction of 110kV Xianglin I and II × 29- × 43 relocation project of Fuzhou Xiamen high speed railway. According to the original design scheme, the whole station of 110kV Linwei substation needs to be cut off, and 17 10kV outgoing circuits of Linwei substation need to be cut off or transferred to power supply, which will cause a wide range of power cuts to the surrounding areas, and the residents' lives will be affected, which is the biggest concern of the project team.

? After repeated field investigation and certification, the project team optimized the technical scheme and changed the power supply mode of the grid. "Start from the source of the design to demonstrate the connection scheme. Though the construction cost has increased through the temporary jumper connection, it is necessary to ensure that the forest tail transformer does not need to stop completely and that the residential power consumption is not affected." Sudden situations emerge one after another. Their determination to solve problems properly drives them to work hard and spare no effort. The project team was also impressed by the

? 110kV Guanxiang (neicuo) project. In the original design scheme, the ground wire across the railway needs to be removed during the power outage construction, waiting for the railway to open the "skylight". How to control the time without affecting the construction progress? The design, operation inspection and construction personnel made partial adjustment to the original scheme, and transformed the original three-phase cross arm of the × 12 tower with the tripod to lengthen the hanging point. 35 technicians and 40 migrant workers have been put into operation. On the premise of ensuring that the old line is not demolished, the cable will be stopped and the connection will be changed, so as to minimize the external power outage and meet the construction requirements of high-speed railway.

? The hardest work day and night without complaint

? Huang Shunan, who has been in operation for 18 years, is an experienced "old power man". He once served as the power relocation project manager of Xiamen North bullet train station. He has rich experience in the control of project quality and overall situation. For the first time, he asked the team to keep improving in the face of such a project that spans many projects, has high safety risk and is difficult to construct.

? On the fourth day of this year's lunar new year, electric power construction personnel entered the construction site early to carry out civil construction. In order to meet the urgent needs of railway construction, two sides of the construction site shall be excavated at the same time, and multiple working procedures shall be carried out simultaneously. In case of collision with the Xiamen Shenzhen bullet train, the electric power workers cooperated with each other, and all the staff went to the battle in more than an hour when the bullet train stopped working at night, so as to start the work as soon as possible. Since the Spring Festival, during holidays such as may day and Dragon Boat Festival, the power construction has never been shut down, and all staff have always adhered to their posts to ensure the rapid progress of the project.

? It is understood that during the peak period of construction, nearly 100 people will be put into the project at most, eight hours a day of flow operation, day and night. "We snatched the time for the project," Huang told the leader A 6031 a 6031? The most advanced technology UAV helps the "excellent project" a 6031 a 6031? There are human efforts and new technical means to support it. In response to the belt and road initiative and to enhance the soft power of China's engineering construction, the project team also benchmarked the international engineering technology standards and optimized many traditional practices.

? The 110kV Dingzhu line, located in Dongfu section of Shenyang Haikou expressway, has been temporarily relocated from chen40 to chen45. The line crosses the Dongfu Expressway gas station and has a large traffic flow. If the traditional way is adopted, the conductor will be placed on the ground and crimped, which will affect the normal traffic order around the gas station, and there are certain safety risks. Therefore, the project team is brave to innovate, simplify the steps of conductor ground crimping and re tightening, and erect conductor high-altitude crimping, which not only completes smoothly, but also improves the working efficiency by 30% and saves 50% of crimping construction time.

? In addition to the high-altitude crimping construction of the stringing, the process of power relocation and transformation has also used UAV setting out for many times. In the past, it was necessary to open up a special setting out track to clear the site. Now, only a small "aircraft" is enough to avoid the impact on the land under the line.

? Take multiple measures to complete the relocation as soon as possible? On September 29, 2019, Xiamen Road and Bridge Construction Group Co., Ltd. sent a thank-you letter to the project team. In the case of tight time and heavy tasks, the power relocation project team of Fuzhou Xiamen high speed railway took the initiative to overcome difficulties and effectively ensure the smooth progress of the construction of Fuzhou Xiamen high speed railway project, which was affirmed and acknowledged by all parties.

? Starting from the overall situation of Xiamen's urban development and planning, the power relocation project of Fuzhou Xiamen high speed railway also adopts a large number of cable transformation. Once densely interwoven overhead lines are now buried deep underground, improving the disaster resistance of typhoon days and thunderstorm days, making Ludao more beautiful.

? Next, Xiamen power supply company will coordinate with China Railway Nanchang Bureau Group Co., Ltd. to open "skylight" procedures, coordinate with relevant units to promote, continue to make efforts in the aspects of power relocation project crossing railway construction, cable line project, land acquisition and demolition, strive to complete the power relocation construction of Fuzhou Xiamen high speed railway as soon as possible, and help Haixi city of Fujian Province City group construction.