"Millimeter level" duel: unlock the "customs clearance" of Linjian high -quality road surface

Make quality creative benchmark

Report a series of Ping An Centennial Quality Engineering Series

At present, our province is solidly promoting the construction of the "Ping An Centennial Quality Project" and the three -year special action of the highway, and vigorously improve the quality of the road as asphalt pavement, and put forward higher requirements and larger goals for road engineering. As the main force of transportation construction in the province, Zhejiang Transportation Group's Linjian Expressway is exploring the "Quality of Zhejiang Road" and carried out a "millimeter" quality duel.

How to measure 0.1 mm? It is almost a piece of A4 paper, which is much thinner than our nail cap. If there is a 0.1 mm crack on the road, how much can the impact on the road?

"After the rainy weather, the repeated water evaporation, saturation, evaporation, saturation ... ', 0.1 mm cracks will become 1 mm and 2 mm cracks. With the accumulation of quantity, the cracks continue to increase, and a one forms a one. In a potholes, driving will bump, and directly reduce the comfort of the departure experience. "Linjian high -speed deputy commander Ying Junzhi said that the seemingly inconspicuous small cracks are the" block "of the quality of the pavement engineering. Working is to compete with such small cracks that are difficult to detect by the naked eye, and "cure" in advance to create a comfortable and durable quality road.

"The road should be unobstructed and comfortable. After taking friends, we will drive a more stable on our building high speed in the future, and their happiness will be improved a little. "So, for the quality of the quality pavement, you still have to make a volume."

It is understood that starting from last year, Linjian Highway is guided by the benchmark of the province's quality road surface, and plans the road surface construction plan in all directions. Carefully step by step, focus on improving the quality of asphalt pavement construction, extend the service life of the pavement, and promote the construction of a century -old quality project.

The plan is getting thicker, the goals are getting thinner, and the requirements are getting higher and higher, which means that the measures are becoming more and more real. In terms of quality common problems, the headquarters specially carried out special topic research on pavement crack treatment and "bridgehead jumping".

In response to the cracks of the bridge and tunnel road surface, the Linjian High -speed Headquarters jointly set up a working group to eventually use epoxy resin grouting and closed process to be closed on the cracks to effectively dispose of the quality of the concrete pavement. sex.

In addition, in order to solve the problem of "bridge head jumping", Lingjian high -speed "do" "make articles" from the back of the platform. On the one hand, improve the quality of mixing material, complete the mixing of water stability mixed materials in the factory, and accurately control the cooperation ratio of water stability; on the other hand, improve the standard in the construction process, set the thickness indicator bar in separate steps, layered compactness, compact compacation Each thickness is 15 cm, and after the construction is completed, the sand irrigation method is used to check the thickness and compactness. "Reducing the depression of the table to reduce the height difference between the back and the bridge deck, so that the bridge head can avoid jumping and improve the comfort of driving." ","

Nowadays, the construction of Linjian high -speed asphalt pavement continues to advance at a rate of more than 1,500 meters per day, and the time will also be verified to write a powerful answer to the improvement of the improvement of the quality of the high -speed road surface.

Produced | Ding Qiancheng Zheng Li

Edit | Sha Kaiyi

Reporter | Shen Yingyi Correspondent | Chen Jingwen

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