"Xiong'an Quality" in Power Grid Construction: The World's First UHV Transmission Line Cut and Cut Project

"The height difference of the column construction of the 1000 kV UHV steel tower is in accordance with the national construction standard. The horizontal error is allowed to be within 5 mm. Now we can improve the standard and improve the process to achieve the breakthrough of the height difference of all the foundation construction within 2 mm. , created the 'Xiong'an quality' of power grid construction." On June 4, in the Xiangzhuang Village, Xiong County, Xiong'an New District, 1000 kV UHV Dinghe (Hebei Baoding-Tianjin Haihe) AC transmission line construction site, construction project department party Branch secretary Song Wei introduced.

According to the latest design standards, the 1000 kV UHV Dinghe line is resistant to earthquakes with a 7 degree intensity, 11 levels of squally winds, and 10 mm ice coating.

The new double-circuit steel tube tower is 8 bases, and the newly-built line is 2.26 kilometers. After the completion of the project, it will provide strong security for the operation of the two high-speed railways in the Xiong'an New District.

The 1000 kV UHV Dinghe Line under construction is across the proposed Jingxiong Intercity Railway and the Beijing-Hong Kong-Taiwan High-speed Railway Project. It is the first large-scale power grid construction project in Xiong'an New District and the world's first UHV transmission line cutting project.

On June 4, Xiangzhuang Village, Xiong County, Xiong'an New District, 1000 kilovolt UHV Dinghe AC transmission line construction site. Photo by Gu Yulong

The 1000 kV UHV Dinghe line is also an important transmission channel for the 100% clean-up of external power in Xiong'an New District. With the help of National Grid, the world's largest energy Internet, to optimize the allocation of energy resources nationwide, wind power in northern China and hydropower in the south will be continuously transported to Xiong'an New District to help this city become a green wisdom. New town.

The “Xionan Quality” of power grid construction comes from top-level design and system design. In order to ensure that “Xiong’an Quality” is effective in the implementation of the project, the State Grid Hebei Electric Power Company has specially formulated a safety and quality control plan for the 1000 kV UHV Dinghe line relocation project, involving 22 aspects of six major categories, from the design plan, Material inspection, construction operations, process management, personnel training, subcontracting team management and other aspects have made stricter than industry standards. According to the latest design standards, the 1000 kV UHV Dinghe line can withstand earthquakes with a strength of 7 degrees, 11 winds, and 10 mm ice; the importance coefficient of the tower structure is increased to 1.2, which enhances the overall strength of the tower structure and resists nature. Disaster capacity.

The project site implements “trace management”, and each key process leaves image and video materials and is included in project file management.

At the construction site numbered N2, a rugby-sized camera on a wooden frame is particularly eye-catching. This "rugby", which is sometimes still and sometimes rotating, has a great use. It can monitor the safety and quality of on-site construction throughout the day without dead ends. Five hundred meters away from the camera, a fingernail-sized thing can be seen clearly. The camera is connected to the mobile phone of the project department computer and key management personnel. The management personnel can understand and master the real-time dynamics of the construction site even if they are thousands of miles away.

Construction workers told reporters that the “Xiong’an quality” of the power grid comes from technological innovation and technological innovation. He introduced the self-developed 3D animation technology software, which simulates the real situation of key construction links through 3D digital technology. It has the characteristics of visualization, coordination, optimization, simulation and information synthesis, and is applied for the first time in engineering construction. Through the "war chess show", the real situation of the construction was simulated with a 1:1 standard, which effectively improved the quality control of the key links.

The project site implements “trace management”, which leaves image and video materials for each key process and is included in the project file management to ensure that the construction quality can be verified and traceable.

Countless construction nodes are completed on time in hours or even minutes

In the 1000-kilovolt ultra-high pressure Dinghe line 8-base steel tube tower, the heaviest N8 tower has a total weight of 242 tons, the tallest N3 tower has a full height of 120.4 meters; the lightest N6 tower has 137.6 tons, and the lowest N1 tower has a total height of 95 meters. . Each base tower consists of thousands of towers and tens of thousands of bolts. These giant towers, which look similar, have different forces due to different geological, geomorphological, hydrological and meteorological conditions. Each tower and even every bolt is carefully calculated and tailored. Tens of thousands of bolts are fastened. The rate is 100%.

Song Wei said that the "mass quality" of the power grid comes from the spirit of craftsmen, and numerous construction nodes are completed on time and in hours. In the 8-base steel tube tower, there are also 96 base towers with the least number of ground nuts, which add up to nearly a thousand. When the foundation is poured, the nuts and bolts are separated and paired during installation to ensure that the anchor bolts and nuts are absolutely precisely matched.

“'Xiong'an Quality' was created by one project, one detail, and one operation. The 1000 kV UHV Dinghe River relocation project is the benchmark for the construction of Xiong'an New District Power Grid.” State Grid Hebei Electric Power Company The person in charge said that this year, Xiong'an New District will start construction of 22 large-scale power grid projects. They will do every project according to the highest standards and the strictest requirements, and add to the high-quality development of Xiong'an New District.