In the company of the mountains, the penetration of one tunnel after another has witnessed the trajectory of his growth. From the Baolan high-speed railway to the Guinan high-speed railway, and then to the plateau railway, between the mangy mountains in the southwest of the motherland, he has left the results of his technical research time and again.
Jiang Wentao, 35 years old this year, was recruited to the China Railway 12th Bureau Group in 2008 and is now the head of the 5th Standard And Five Engineering Zone of the Plateau Railway of the 12th Bureau of China Railway. For more than ten years, he has been sticking to the front line of national difficult tunnel construction, leading the team to successfully overcome international problems such as the construction of collapsible loess tunnels and the construction of shallow buried sections of loess tunnels, filling the gap in domestic railway construction technology, not only breaking the monopoly of foreign technology in one fell swoop, but also greatly reducing construction costs.
The reputation of the Twelfth Bureau of China Railway to fight and be good at building long tunnels is well-known at home and abroad, as a youth representative of the "infrastructure madness", Jiang Wentao knows the importance of mastering the core technology, and in the process of crossing mountains and mountains again and again, he has always held high the banner of striving and forging ahead, and the figure of young people in the new era has been fixed in the mountains and rivers of the motherland.
"I am a child of a peasant family, and I chose civil and underground engineering because I could bear hardships." The winner of the 26th Chinese Youth May Fourth Medal said.
The first project that Jiang Wentao participated in was the Xiamen-Shenzhen Passenger Dedicated Double Eagle Top Tunnel, with a total length of 9,275 meters, which crossed 10 faults and a goaf area. Jiang Wentao, a fledgling technician at the time, followed his master every day and squatted in the tunnel with a small book, recording how the workers measured and punched holes. What Jiang Wentao remembers most is that "a rock explosion occurred during construction, and more than two tons of stones almost hit him." Later, every time Jiang Wentao's master entered the tunnel, he went first to see the situation and let him follow behind.
Jiang Wentao recalled: "The first project coincided with the Beijing Olympic Games, and the whole industrial area was gathered around the canteen to watch the opening ceremony of the Beijing Olympic Games, and the whole industrial area was such a TV set. ”
The second project that Jiang Wentao participated in was a heavy-duty railway in Shanxi. "There is no road there, in the ravine, the project department relies on people to carry vegetables to the work area, and there is no signal." Jiang Wentao recalled the scene to the reporter of China Youth Daily and China Youth Network, "For about 9 months, we basically had no contact with the outside world. ”
Solid professional skills and hard-working quality, so that Jiang Wentao quickly stood out in the 12th bureau of China Railway.
"In the construction of the railway corridor in central and southern Shanxi, considering the geological environment of the loess, the upper side is sometimes soil, the lower side is stone, and the stone below is to explode, which will trigger the risk of the soil above shaking and falling off the block." How to solve the problem of loess silty clay tunnel construction is in front of us. In 2010, Jiang Wentao, who loved to think, took the initiative to take on this problem and began to tackle the problem of independent technology.
The construction of the long loess tunnel is an international problem, and there is no mature experience to learn from. Jiang Wentao led the team to set up a scientific research team, while humbly asking for advice from experienced old comrades, while optimizing the blasting method and finding a way to quickly achieve the sealing of the surrounding rock.
In view of the characteristics of loess with collapsing nature, silty clay with expansion, and poor stability of the soil-stone demarcation interface, Jiang Wentao aimed at "construction and measurement technology of collapsible loess tunnel", "geological construction technology of soil and stone horizontal contact surface of railway large-section tunnel", "construction technology of shallow buried section of loess tunnel" and other strong research.
Through the comparative analysis of the drilling position map and the site situation, the design optimization focuses on the key links such as the uncoupled charge coefficient, the peripheral eye spacing, the light burst layer, and the charge structure.
"Finally, the number of drilled holes was gradually reduced from 247 holes to 192, the single consumption of explosives was gradually reduced from 1 kg per cubic meter to 0.72 kg, and the average linear over-excavation of the arch wall was reduced from 18-20 cm in the previous period to 15-18 cm, achieving centimeter-level control accuracy on more than 140 square meters of working surfaces." Jiang Wentao said.
Up to 3 years of technical research, Jiang Wentao led the team to form a scientific research result such as the tunnel construction method of the earth-stone demarcation section with independent intellectual property rights, which reached the leading level in China and saved huge costs. Today, this achievement has become a "textbook" to guide the construction of long loess tunnels in China.
Jiang Wentao also took the lead in the research on the construction technology of shallow buried soft rock tunnels, participated in the construction of the Yingpanshan Tunnel of the Chengkun Railway in the difficult and dangerous mountainous areas of southwest china, and overcome the world's technical problems of "collecting gushing water, gas, rock explosion, and high-altitude stress are equal to one body", and completed the task that foreign experts called "impossible".
He told reporters: "We must have a spirit of not being afraid of death in this line, and when we encounter problems, we will do everything possible to overcome it, and the most direct thing is war." ”
"Come for responsibility, fight for dignity!" This is the belief that Jiang Wentao adheres to, "The builders of our generation have caught up with the good times of the great construction of the motherland, and many things they have done are groundbreaking, which is an honor and a mission." ”
In 2020, Jiang Wentao was selected as the construction leader of the first special high-risk tunnel on the entire line of the Plateau Railway, and he once again packed his bags and rushed to the Qinghai-Tibet Plateau.
This time, 90% of the construction work points of the pipe section that Jiang Wentao is responsible for are concentrated in the high mountain ravines, which is the lifeline of the plateau railway construction. The tunnel surface is more than 3,000 meters above sea level, with a slope of 60 to 70 degrees, the geology is loose, and the excavation of the sidewalk will be accompanied by dangerous rocks falling and the local power and material supply is very tight.
In just over 3 months, Jiang Wentao led the team to safely cross the 5 Yarra River active fault zones and their branch fault zones, efficiently completed the construction of the most difficult, longest, most complex geological terrain and the highest environmental protection requirements in the early stage of the plateau railway, won the "five firsts" excellent results of the whole line, and set up a plateau railway construction model.
The construction period of the plateau railway construction section undertaken by the 12th Bureau of China Railway is 10 years, Jiang Wentao told reporters: "The most difficult road sections in the first two years have been opened, and there will be new difficulties in the future, but we are confident that we can cope with it." ”
"General Secretary Xi Jinping has said that key core technologies are the most important tools of the country and are of great significance to promoting the high-quality development of the mainland economy and ensuring national security." Jiang Wentao believes that as China's young builders in the new era, we have the responsibility and mission to overcome key core technologies and contribute to the high-quality economic and social development of the mainland.
Affected by the epidemic, Jiang Wentao and all the personnel stayed at the construction site, and it became normal to be unable to go home and reunite with their families on holidays. "Many of our builders are selflessly dedicated and persevering, and during this year, some people's fathers fell ill and did not go back; Some people have wives who have children and don't go back, and they are worried about delaying the construction progress..." he said.
"Loyalty and filial piety are difficult to complete!" We are all honored and proud to be involved in the construction of the high-risk tunnel of the Highland Railway. Jiang Wentao said.
China Youth Daily, China Youth Network reporter around the circle Source: China Youth Daily
Source: China Youth Daily
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