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A new case of intelligent construction! For the first time in the country, the Nanjing section of the Ligao Expressway was constructed by domestic intelligent complete road machine equipment

  • 2021.09.24

Construction time

August 2020

Construction site

Jiangsu Ligao Expressway

The type of project

highway

Device type

Road machinery

 

In 20208month14On the same day, sponsored by Jiangsu Provincial Traffic Engineering Construction Bureau and Nanjing Public Works Construction Center, and undertaken by Jiangsu Changxin Road and Bridge Group Co., Ltd., the Jiangsu Provincial Expressway Asphalt Pavement Intelligent Rolling Construction Technology Exchange Conference was held in Liyang, Jiangsu. Leaders from local transportation departments, industry authoritative experts and representatives of pavement construction units300More people attended the meeting and came to the Nanjing section of the Li (Yang) Gao (Chun) Expressway (LYG-NJ21Bid section), observed the on-site construction of Sany's high-end intelligent black pavement complete sets of paving and compaction equipment.
 
On-site observation The intelligent construction of the complete set of road machine is shocking
 
The construction of expressways in Jiangsu Province has always been known for its high standards and strict requirements, and has led the development of the industry. By the end of 2019, the total mileage of highways in Jiangsu Province was about1610,000 km, the density of highways has reached154kilometer/100 square kilometers. According to the plan,2020Jiangsu Expressway mileage will break through5000Kilometer. Jiangsu Province is not only densely populated with expressways, but also has particularly strict construction standards for expressways, with requirements for asphalt surface course flatness that are even smaller than national norms0.4mm, which puts forward high requirements for pavement paving.
 
As an important part of the "Hengba" Gaochun-Taicang Expressway of the main skeleton of the "five vertical, nine horizontal and five linked" expressway network in Jiangsu Province, Ligao Expressway is the first fast passage connecting Gaochun to southern Jiangsu and even Shanghai, which is of great significance for improving the expressway network in the Yangtze River Delta region, strengthening the economic ties in southern Jiangsu, and promoting economic development along the route. In order to improve the quality of the project and improve the construction efficiency, this year3In January, the Jiangsu Provincial Transportation Department and the construction unit of Ligao Expressway boldly tried to use intelligent equipment to put Sany high-end intelligent black pavement paving compaction equipment into the construction of Ligao Expressway.

 



The pavement construction of the Nanjing section of the Ligao Expressway is the first application of Sany's complete set of intelligent compaction assistance system in the expressway, and it also makes the Nanjing section of the Ligao Expressway the first expressway in the country to be constructed by domestic intelligent complete sets of road machine equipment, and becomes a new case of intelligent construction of the expressway, which has attracted the participants to come to the site to observe.
The complete sets of intelligent pavement paving equipment involved in the construction are all Sany C8 series products, and its representative Sany Yellow injects a different scenery into the Ligao Expressway. They are specially developed for high-grade pavement with large width and large thickness paving compaction, and are equipped with Sany intelligent compaction assist system. Construction site, two sets of three12m large widthC8PaversSAP120C-8Parallel paving, two30tonSPR300C-8Tyre rollers,5platform13tonSTR130C-8Tandem rollers followed, compacting the road back and forth, creating a spectacular and lively atmosphere.

 



On the control platform, you can clearly see the running track, blanking data, production orders and other data of the equipment in construction, and can automatically generate quality reports to realize the collaborative operation of the equipment. The construction party can view the construction progress and construction quality in real time, and can play back the construction track animation to provide big data support for construction process improvement and later equipment maintenance.

 



Sany Intelligent Compaction Assist System is a new generation of digital intelligent construction assistance system developed based on high-precision Beidou positioning, intelligent sensors, wireless networks, cloud platforms and big data. According to Zhong Huiping, deputy director of Sany Intelligent Research Institute, Sany Intelligent Compaction Assist System has changed the shortcomings of traditional paving and compaction operations, and its communication speed and positioning accuracy are powerful, and it can also give voice prompts to the driving speed and compaction temperature to avoid the impact of too fast and too low temperature to affect the construction effect. At the same time, the system can completely record each rolling process, reducing the difficulty of construction measurement and improving the efficiency of construction data collection.
 
Shi Lixin, project manager of the LYG-NJ21 standard of Jiangsu Changxin Road and Bridge Group Co., Ltd., said in an interview at the site that the use of intelligent compaction technology reflects three major characteristics: first, it improves the traditional post-construction inspection to the "in-process", which is convenient for the construction party to control the compaction situation in time; Second, it greatly improves the quality of the pavement by accurately grasping the technical indicators such as compaction, water seepage, and structural depth; Third, it greatly improves the construction efficiency, thereby also improving the economy of construction. On this basis, in the future, they will also actively try the construction of unmanned road machines.

 


Shi Lixin, project manager of Jiangsu Changxin Road and Bridge Group Co., Ltd. Ligao Expressway LYG-NJ21 standard, was interviewed

 

With the construction of complete sets of paving and compaction equipment for Sany Road, the three-layer asphalt paving process of Ligao Expressway will be completed in late August. After the completion of the three-layer asphalt paving, it represents the official completion of the pavement project of the Nanjing section of the Ligao Expressway, and the next step will be to install guardrails and mark markings. estimate10At the beginning of the month, the highway constructed by the domestic complete set of intelligent road machine equipment will be opened to traffic.
 
Xiao Zhengwen, general manager of Sany Heavy Industry Road Machinery Co., Ltd., said that as a leading enterprise of construction machinery, Sany Heavy Industry has been keeping up with the trend of the times and taking intelligence as the starting point to promote the transformation from "Made in China" to "Created in China". The highway asphalt paving and compaction operation used a full set of domestic intelligent road machine equipment for the first time, which is a new breakthrough in the national road machinery industry. This means that the national brand has made a breakthrough in the high-grade highway asphalt paving market, which represents the improvement of the overall strength of the road machinery equipment manufacturing industry, and also indicates that the national road machinery equipment manufacturing industry has made a qualitative leap.

 

   Expert Discussions  Intelligent construction is a powerful tool to improve the quality of projects

 



At the exchange meeting, Sun Quandao, the LYG-NJ21 standard project department of Jiangsu Changxin Road and Bridge Group Co., Ltd., made a report entitled "Introduction to the Construction Technology of Ligao Expressway", introducing the principle, application effect and promotion prospects of intelligent compaction assistance technology. He introduced that intelligent compaction assistance technology belongs to the cutting-edge digital construction technology, which is mainly composed of:RTKPositioning system, on-board computer, intelligent sensor, wireless communication network, etc. This technology can make up for the shortcomings such as the lack of detection means in traditional construction, difficult to repair defects, lack of quantitative indicators and in-process control measures, it enables the driver to eliminate leakage and underpressure in time in the construction process through real-time prompts, reduce overpressure, adjust the compaction position and the number of times, significantly improve the accuracy and uniformity of compaction, promote the overall construction quality of the road surface, so it has a good promotion prospect.

 


Sun Quandao, Jiangsu Changxin Road and Bridge Group Co., Ltd., Ligao Expressway LYG-NJ21 Standard Project Department, introduced the application of intelligent compaction technology

 

Wang Ruiwen, director of the laboratory of the Ligao Expressway Project Center of Jiangsu Provincial Traffic Technician College, brought the "Construction Quality Evaluation of the Pavement Intelligent Rolling Auxiliary System". After strict comparison of experimental data, he affirmed the effect of intelligent Sany pavement complete sets of paving and compaction equipment in Ligao high-speed construction, and believed that the intelligent rolling system is a weapon for continuous improvement of engineering quality, which conforms to the cyclical rate characteristics of quality engineering, conforms to the in-process control concept of process control theory, is the internal embodiment of lean production, is the inevitable result of equipment iteration, and is a project quality solution from the future.

 


Wang Ruiwen, director of the laboratory of the Ligao Expressway Project Center of Jiangsu Provincial Traffic Technician College, conducted detailed experimental data analysis

 

Huang Xiaoming, deputy dean of the School of Transportation of Southeast University, explained the "roadbed pavement intelligent compaction technology", he introduced the ground penetrating radar, magnetic induction imaging, capacitance tomography and other road microscopic detection technology, that the connotation of intelligent compaction includes modern vibration compaction equipment, intelligent detection system, map, data feedback and control system, etc., the significance of intelligent compaction is to obtain better compaction performance, save money and improve efficiency, increase the amount of information, and achieve better quality control. He said that new technologies need to be continuously improved in specific practice, and the application of Sany complete sets of intelligent road machines in Ligao Expressway is a very good exploration.
 


Huang Xiaoming, deputy dean of the School of Transportation of Southeast University, expects that intelligent compaction technology will be more applied and continuously improved in practice.
 
In the technical exchange session, Huang Xiaoming, deputy dean of the School of Transportation of Southeast University, and Liu Qiubao, dean of the Sanyi Road Machinery Research Institute, interacted with the participants to discuss the technical status and future development trend of intelligent road construction.
 


Liu Qiubao, President of Sanyi Road Machinery Research Institute, answered the technical questions raised by the participants
 
It is understood that after more than 4 months of inspection, the surface construction effect of Sany high-end black pavement complete set of paving and compaction equipment equipped with intelligent compaction assistance system has been verified: the road surface is smooth and clean, no color difference, and the material segregation control is excellent, which fully meets the highway construction standards. The owner and relevant leaders gave a high degree of affirmation: "Sany paver walks, feeds stably, has a high degree of automation, and the flatness and compactness of the surface layer meet the design requirements. ”
 
Connect upstream and downstream  Assist in the intelligent construction and maintenance of the whole life cycle of the project
 
After more than 20 years of unremitting efforts, Sany has made great progress in the field of complete road paving and compaction. Sany high-end intelligent pavement paving compaction equipment participating in the construction of Ligao Expressway once again demonstrated the strength of the national brand with excellent performance, and Sany Yellow will always stay in the construction process of Ligao Expressway and stay in the milestone of highway construction.
 



In the era of the Internet and big data, intelligence has become a key factor leading the development of the construction machinery industry. In fact, Sanyi Road Machine has been exploring in intelligent construction for a long time. In 2018, Sanyi Road Machinery launched an unmanned single-drum roller, opening a chapter of unmanned;2019In the year, Sany Road Machine once again took the lead in the industry to launch unmanned paving+rolling complete sets of intelligent equipment;2019year12In January, Sany unmanned pavers and unmanned roller crews were put into trial operation for the first time at the construction site of Shanghai Zhujian Road Road Reconstruction Project, boosting road construction to a new level of intelligence and unmanned.
 
Intelligent construction provides a broad prospect for the development of the pavement construction industry. The advent of Sany intelligent compaction assistance system is like installing a "smart brain" on the equipment, which is of great significance to improving the level of highway modernization in China. The intelligent assisted compaction construction amazed the participants and will also bring new changes to the pavement construction industry.
 
At present, the development momentum of new infrastructure and intelligent construction in the field of transportation is rapid. Some industry experts said that the intelligent rolling construction of highway asphalt pavement shows the strong construction effect of intelligent equipment, and it can be combined with BIM and other technologies with fine construction process data, and extends to the maintenance link upward, providing a new perspective and way to improve the level of intelligent construction and maintenance and operation management of the whole life cycle of the project.

Next article: 2019 Shanghai|This "future technology" debuted in Shanghai, and since then the pavement has been paved with asphalt "without people"

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