The 3.57 km tunnel was fully penetrated in only 10 months. This is a new world record set by Sichuan Road and Bridge, a subsidiary of Shudao Group, in the construction of Zhenguang Expressway. In addition, Zhenguang Expressway has also realized the first time that Sichuan Expressway uses Sany unmanned intelligent pavement fleet for intelligent asphalt pavement construction.

The high speed that creates the world's construction miracle

The Zhenba (Sichuan-Shaanxi border)-Guangan Expressway is a "red highway" with a total length of 261 kilometers. After the completion of the entire line, it will open up the red tourism channel in the Sichuan-Shaanxi-Soviet area, connecting the former residence of Deng Xiaoping, the Huaying Mountain Scenic Area, and the Sichuan-Shaanxi Revolution. The regional red tourism resources such as the Base Museum and Wangping Martyrs Cemetery will promote the economic and social development of the old revolutionary areas, and will realize the rapid exit from Sichuan to Shaanxi, becoming the most convenient passage from Xi’an to Chongqing.

"The starting point is to sprint. To complete this challenging task, we must fully inherit and carry forward the'Red Army Spirit' and the'Iron Army Spirit'." Ma Fubin, the project manager of the A3 section of the Wangtong Section of Zhenguang Expressway, said that the bridge-tunnel ratio of the A3 section is better. As much as 83%, basically except for the bridge, it is the tunnel. The difficulty of construction is self-evident. Ma Fubin, who feels the heavy responsibility and "heavy pressure", only sleeps for 3-4 hours a day for a long time.

After 10 months, overcoming many difficulties such as complex geological conditions, poor transportation channel conditions, and high safety risks of mountain floods in the rainy season, the Wangtong section of Zhenguang Expressway successfully completed 85% of the physical engineering volume and realized 7 tunnels (including 3.57 kilometers of extra-long tunnels), All 25 bridges (including 3 extra-large bridges with the highest pier height of 102 meters) are connected, creating a new miracle of the world's highway construction progress.

Contribute to the quality construction of Zhenguang Expressway

It is one of the construction concepts of Zhenguang Expressway to build a smart highway and let travel experience "speed on the cloud". “In terms of road paving, we use the Sany unmanned intelligent pavement machine cluster for intelligent paving operations. This is the first time in Sichuan!” Ma Fubin said that the intelligent construction of unmanned vehicle clusters is the development trend of the industry. For Shudao Group, the high-speed also opened a new chapter in intelligent construction.

The high bridge-tunnel ratio is a major feature of Zhenguang Expressway

"From the data of paving flatness, compactness and other aspects, it fully meets the requirements of construction design standards." Ma Fubin said that the construction of Sany's unmanned intelligent road machine group not only saves manpower, improves construction efficiency, and more importantly. Through precise control, information such as roller process parameters and rolling passes can be recorded in the intelligent compaction quality control system in real time, which achieves visualization of the construction process, controllable construction quality, and traceability of construction data, ensuring road paving pressure The quality and safety of implementation workers.

Unmanned fleet construction is the trend

Shudao Group is committed to building Zhenguang Expressway into the country’s first red-themed expressway, using slopes, tunnel openings, and tunnel widening along the route to implement red landscape design, theme sculptures, stone carvings, etc., to create an immersive red for tourists The vigorous implementation of new technologies such as highway construction and Sany unmanned intelligent road cluster construction has provided strong technical support for the creation of a "quality town".

The Sany road roller with an empty cab is under construction

"At present, most of the high-speed road construction equipment still adopts imported brands. In the future, more advanced and smarter unmanned spreader group construction modes will allow domestic brands to play a leading role in highway construction!" Ma Fubin said, expressway Intelligent construction of road unmanned vehicles is definitely the future development direction.

All the personnel involved in the construction of Zhenguang Expressway are the creators of miracles. The construction records they created have made the world once again see the remarkable "acceleration" of China's construction, and the successful application of Sany's unmanned intelligent road vehicle construction in Zhenguang Expressway , It also provides a brand-new construction solution for the construction of mountain expressways. Editor/Tian Zengpeng