Here comes the 3D printed highway?! Yes, better and more stable quality!

3D printing We've heard of "printing parts" and "printing houses", but 3D printing roads?! You haven't heard of it, have you?

In order to promote the project construction with higher quality and efficiency, the 14th Bureau of China Railway has broken through the traditional construction mode and actively explored the new technology of 3D digital intelligent paving in Zhanjiang Ring Expressway Project Department.

Yes, the 3D printing highway is coming, and the quality is better and more stable! The new technology of

3D digital intelligent paving, commonly known as "3D printing" of pavement, realizes construction automation, intelligence and precision through three steps of data acquisition, fitting and modeling, site three-dimensional spatial positioning and automatic construction control, and can automatically control the paving height, slope and direction in the whole process.

The application of 3D digital intelligent paving technology for pavement operation

"The traditional paving technology is manually adjusted, requiring multiple points to measure elevation and temperature, complicated measurement work and the superposition of errors, which adds a great burden to the operators." Zhao Changdong, the person in charge of the scene, introduced. After using the new 3D digital intelligent paving technology, the intelligent construction is realized, and each working face can reduce about 9 workers during construction, which not only reduces the impact of human factors and construction machinery on construction quality, but also greatly improves the construction safety. The

3D digital intelligent paving system interface

technical consultant introduced that the 3D paving system tracks the optical target installed on the paver body through the total station and transmits the position information to the system on the paver body, so as to obtain the positioning accuracy within 3 mm error, without the need for lofting, piling and hanging. Digital construction is really realized. At the same time, it can also automatically control the screed to the design elevation, and the slope sensor installed on the screed can accurately capture the screed posture, so that the system can adjust the screed to the design slope, so as to accurately control the paving thickness and slope.

"The qualified rate of pavement flatness, thickness and cross slope paved by 3D technology has reached 100%, which is 10% -15% higher than that of traditional technology, and the pavement thickness index has good uniformity and small discreteness." Project leader Du Yu said. In addition, 3D technology is in line with the general trend of national high-quality development, and has obvious advantages in promoting the establishment of quality engineering, promoting the improvement of engineering quality, and promoting the development of modern engineering construction management to specialization, standardization, informatization and refinement.

It is reported that Zhanjiang

Ring Expressway is the first expressway leading to the three southern islands. After the project is opened to traffic, it will expand the development space of Zhanjiang City, enhance the cohesion and radiation influence of regional economic development, alleviate the traffic pressure of urban road network, and improve the external travel of the central area.