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A closer look at the 500kV power line, Circuit 3, before its completion in Ha Tinh province. Video: Pham Truong |
In the final days of August, construction workers are rushing to complete the remaining tasks on the 500kV power line project, Circuit 3, which spans from Quang Trach to Quynh Luu and passes through Ha Tinh province. The goal is to finish in time for the National Day celebrations on September 2nd.
The Circuit 3 power line stretches approximately 225.5 kilometers across three provinces: Quang Binh, Ha Tinh, and Nghe An. With its treacherous terrain, the majority of the line traverses the Hoanh Son mountain range in Quang Binh and Ha Tinh provinces, presenting a significant challenge to the electrical workers since the project’s inception.
According to the Central Power Project Management Board, the Ha Tinh section of the Quang Trach-Quynh Luu 500kV power line project is the largest in scale among the provinces, with a length of over 141 kilometers. It comprises 285 pole foundations, 284 pole spans, and 113 anchor spans across nine localities. Currently, three locations—positions 08, 20, and 22 in Ky Anh town—are being expedited for pole installation. The image shows the installation of pole 08, situated atop Deo Ngang pass in Quang Trach district, Quang Binh province.
“Pole number 8 is designed as a two-body anchor pole with feet offset by up to 4 meters. Each pole stands at 83 meters tall and weighs 315 tons. The installation process faced considerable challenges due to the pass’s steep terrain, limited space, and location between two mountain ranges, with the open sea directly in front, creating a ‘wind tunnel’ effect with strong gusts,” shared Mr. Nguyen Sy Thang, Director of Ha Tinh Power Transmission (the unit in charge of pole installation).
Due to the strong and persistent winds, the construction workers are divided into multiple groups, taking turns working around the clock. They seize moments of calm to install the steel frames, striving to complete the poles as soon as possible.
A 220-ton crane is utilized to lift materials to great heights, but strong winds pose a challenge. Meanwhile, pole number 9 in Ky Nam commune, Ky Anh town, Ha Tinh province, has been successfully installed, and the team is now stringing the wire through this pole.
“The wind can be so strong that it stings our faces and whips off our clothes. Safety is of utmost priority when working at such heights,” shared Mr. Dau Dinh Duc, a technical officer of Ha Tinh Power Transmission.
Mr. Nguyen Sy Thang, Director of Ha Tinh Power Transmission, consistently emphasizes the importance of safety belts and secure practices when working at elevated heights.
Apart from strong winds, the poles perched precariously on mountain ridges hundreds of meters above the ground also present a challenge to the installation crew.
The scorching heat, coupled with strong winds and swirling dust, quickly drains the workers’ energy, necessitating frequent hydration.
“Most of the locations along the Hoanh Son mountain range are extremely challenging. Consequently, the installation of poles and wires in these areas takes a significant amount of time,” Mr. Hoang remarked.
The construction workers eat and sleep hastily next to the power poles to ensure the project stays on schedule.
Positions 20 and 22, situated precariously on the Hoanh Son mountain range hundreds of meters above the ground, are among the most challenging locations for the construction team.
A worker is putting the finishing touches on a pole in Ky Tan commune, Ky Anh district, while another is stringing the wire. “We’ve completed 60% of the wire stringing for this section and are working on the remaining positions and final tasks. The unfinished pole installations are all located in challenging areas. We have urged the contractors to expedite their work to meet the deadline,” shared Mr. Bui Xuan Thai, Deputy Head of the Technical Department of the Central Power Project Management Board.
At positions 135 and 136, which span Upper Tuy Lake in Cam Thinh commune, Cam Xuyen district, workers are installing a frame and inspecting the wire. These poles are among the project’s unique features, standing at 145 meters tall (compared to the typical 50-80 meters) and weighing 426 tons, equivalent to a 30-35-story building.
“This wire span stretches over a kilometer across the lake, resulting in a significant sag. Our team is working at a height of over 100 meters, braving the hot sun and strong winds. It requires good physical condition and a strong mindset. Despite the challenges, we are determined to meet the upcoming grid connection deadline, so we start early and work through the midday heat,” shared Mr. Le Van Hai, a worker from PC1 Hanoi Joint Stock Company.
Working on such a unique power line demands courage, dexterity, and a high level of skill and experience from the technicians.
The contractors are in the final stages of completing the power line to meet the target deadline for grid connection.
The Ha Tinh section of the 500kV power line, Circuit 3, spans over 141 kilometers and includes 285 pole foundations, 284 pole spans, and 113 anchor spans across nine districts and towns. The image shows the near-complete power line.
The inauguration ceremony for the 500kV power line, Circuit 3, is expected to take place before
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