Fighting on the front line 丨 Sichuan's first eight -lane high -speed tunnel right hole runs through the cotton high -speed expansion project to accelerate

Chuanguan News reporter Cao Yiyuan

"This is an important moment in the construction of the project. Everyone must continue to maintain a sense of safety, carefully check each operating point, and also take the epidemic prevention and control measures to ensure the completion of the project's quality and quantity." On the afternoon of September 14th, experience After 500 days of struggle, the important controlling project of the Chengmian high -speed expansion project, the Maanshan Tunnel was smoothly connected at the right, which means that the project is closer to the next goal of opening the traffic.

The Chengmian high -speed expansion project is an important section of the national highway network's capital radiation G5 and the common road section of the G93 Chengyu region. The important position in the national and regional highway networks is an accelerator to help Sichuan Province integrate into the construction of the “Belt and Road” as a whole. It is an important support for the strategy of transportation aorta and the Shuangcheng Economic Circle of the Chengdu -Chongqing area in the western north and south.

"The importance is self-evident. This requires us to not stop for a moment to overcome the difficulty of promoting the project construction and ensure that the project is completed and delivered on time." Mei Chuan, deputy manager of the bid section.

At the construction site of the Chengmian high -speed capacity expansion project, more than 80 meters of bridge pier has been built. Cao Yiyuan Photo

The tunnel penetration of more than 2 months in advance

Mechanized and intelligent construction speed up the project construction

The Ma'anshan Tunnel started in Qiyun Village, Fuxing Town, Zhongjiang County, Deyang City. It ends in Longju Village, Xinzhong Town, Jingyang District, Deyang City. It is 890 meters in length and is the first eight -lane highway tunnel in Sichuan.

At the entrance of the Ma'anshan Tunnel, workers are preparing to carry out the next stage of construction. Cao Yiyuan Photo

"The maximum excavation width is 23.05 meters, and the maximum excavation height is 14.8 meters. This should be the biggest excavation section of the highway tunnel under construction in China." Meichuan summarizes the difficulties of the construction of the Ma'anshan Tunnel into three words, except "big big big," ", There are also" danger "and" difficulty " -" Tunnel surrounding rocks are five -level enclosures, the maximum buried depth is 120 meters, and the construction risk is high; The construction operation surface is more divided, and excavation operations are carried out in the narrow space, and the construction difficulty is also very difficult. "

There is no presence to learn from many factors such as high temperature, rainfall, and epidemic. What should I do if the construction progress is lagging behind? "Then let the machine, use intelligent means, and use technology to improve the efficiency of operation." Meichuan said.

Meikawa took out the mobile phone and pointed to the photo above introduced to the reporter: "We used the arms to cut the rock -cutting car. This car saves energy, low noise, many functions, and high efficiency. In the tunnel digging into mechanized operations Speed, greatly improving the working environment and reducing construction risks. "

In the Ma'anshan Tunnel, workers are conducting mechanized operations. Cao Yiyuan Photo

In the tunnel, the reporter also saw that the integrated trestle of the hydraulic bridge and the two -lined smart pouring platform was working. "All mechanized operations are the purpose of using machines to replace manpower to further improve construction efficiency and construction quality." Mei Chuan told reporters that according to the traditional construction method, the construction of the Ma'anshan Tunnel will need at least 3 or 400 people to operate at the same time at the same time, and the use of mechanized construction after the construction of mechanized construction. At present, only more than 50 workers are needed at the scene.

Not only that, in the construction of Ma'anshan Tunnel, the project uses distributed fiber and micro -displacement monitoring technology instead of traditional monitoring methods and intelligent management platforms to realize the all -weather three -dimensional visible model management of tunnel construction. At the same time, the use of big data technology for intelligent analysis and processing of monitoring data can also achieve dynamic design and security early warning forecasts of the tunnel. The purpose of the full periodic control of security risks and the transverse and vertical errors of the tunnel can be controlled within 5 mm.

"According to the construction plan, the right hole of the tunnel is connected at the end of this year. We have completed the goal after more than 2 months in advance." Meichuan said that next, we must continue to maintain the spirit of "fight" and scientifically build Promote.

On September 14, the right hole of Maanshan Tunnel was connected, and the picture shows mechanized operations in the tunnel. Interviewee confidence

Prevention and control measures for fun epidemic

Do a good job of coordination and guarantee for all parties in the project construction

Epidemic prevention is the prerequisite for safety construction. How does the construction site of Maanshan Tunnel pass the epidemic prevention level?

"We adopt closed -loop management. All job workers strictly abide by the requirements of nucleic acid testing. We must do a good job of scanning, registration, temperature measurement and other work every day before entering the work." Said Meichuan.

Not only that, for those who need to leave the construction site in urgent matters, they must be reported as required. Before re -work, a 48 -hour nucleic acid report must be provided to enter the field after completing the isolation. The reporter learned that in order not to delay the construction of the project, since the this round of epidemic occurred, no workers left the job at the site of the Ma'anshan Tunnel Construction Project to ensure that the construction speed was not affected.

The problem of prevention and control of the epidemic is resolved, but what should I do if the construction materials caused by the epidemic and the equipment cannot be present?

"Some building materials and equipment suppliers cannot produce and ship in Chengdu. We will contact the alternative supplier for the first time to adjust the goods from other regions to ensure construction needs." In this process, the Deyang City Transportation Bureau As the project lead unit, it provides a lot of support and help. "They provide us all the local supplier information to us. Let us choose freely according to the needs and solve the problem of our" first arrival, two eyebrows'. "

"The project is about 50.5 kilometers long in Deyang City, passing through Luojiang District, Zhongjiang County, Jingyang District, Economic Development Zone, and Guanghan City.During the process, the Deyang Municipal Government established a special class to provide factor coordination services to ensure the smooth progress of the project construction.The reporter learned that since the end of last year, the Deyang City Transportation Bureau took the lead in holding a monthly G5 for G5 to expand the capacity of the Deyang section construction scheduling meeting or special research promotion meeting to make full use of the monthly dispatch meeting mechanism to coordinate and solve the project demolition and construction promotionDifficulty at work.

"We have sorted out the current problems and difficulties of the project in detail, form a" one project, one list ", establish a supervision and accountability mechanism, and pay the account number according to the list of problems to form an early work atmosphere before grabbing the project.The bottleneck ', the current project construction is progressing smoothly, it is planned to be completed in 2024. "Xie Health said.

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