Multi-steel columns with a height of 8 meters and a weight of 8 tons are automatically welded together by an arm robot... Recently, the second-stage southeast group project of the second phase of the City Sub-center of the General Group ushered in a "new member": welding robots . This is also the first application of welding robots in the construction of the city's sub-center. At present, the main structure of the project has completed 65%, and it is sprinting towards the goal of capping the main structure in June.

New member "Welding Robot" is on duty

The total construction area of the second bid section of the second-phase southeast cluster of the city sub-center is more than 150,000 square meters. The site is divided into two plots, east and west, each containing a single building with 3 floors underground and 8 floors above ground.

“The construction of the steel structure of the tender section starts from the underground part, from bottom to top, a total of 1,725 steel structure columns are required, each steel structure column is 2 stories high. Among them, the largest single steel structure column weighs 8.9 tons, and the largest slab The thickness is 40 mm.” According to Yang Jie, the person in charge of quality in the project department, the joint steel structural columns are completely connected by welding. The quality and efficiency of welding are directly related to the quality, safety and construction period of the entire building. In the face of such a large-scale steel structure construction work, the project department boldly innovated and applied welding robots that usually work on the assembly line to the construction site, becoming a "new member" participating in the construction of the sub-center.

The welding robot is composed of four parts: the robot body (robotic arm), control cabinet, welding machine and welding torch. The reach of the robot can reach 1.4 meters. The welding torch barrel is specially made according to the project and slightly longer than ordinary welding torches. It is mainly used between steel structure columns. Welding. What are the benefits of using welding robots? "In the traditional manual welding process, the quality of welding often depends on the level of the welder, but for welding robots, after manual programming has been assigned to it, the robot can automatically complete the welding, and the width and narrowness of each weld is in a positive or negative error. It is between 1 mm and 2-3 mm in traditional welding, and the accuracy of welding is greatly improved." Field technicians said that in order to ensure the quality of welding, the welding procedure of each weld is "tailor-made."

In addition to beautiful welding seams and high accuracy, welding robots can also improve work efficiency. According to Hao Han, assistant to the production manager of the project department, through actual calculations, the efficiency of a single welding robot is at least 20% higher than that of manual labor. "In traditional welding, two people can weld about 3 steel columns a day, and a single technician can use welding robots to operate 2 to 3 robots at the same time. The efficiency and quality have been effectively improved."

Every steel member has an "ID card"

The second phase of the sub-center project adopts the prefabricated steel structure construction technology and the factory production of steel structure components, which greatly reduces the dust pollution and construction noise of wet operations on site, reduces the construction waste by more than 80%, and saves energy and environmental protection.

At the construction site, multiple construction machines are working at the same time, and workers are busy shuttled between the steel structures. Each steel component installed on site is printed with a series of component numbers and a QR code label is also affixed. Each QR code label is equivalent to the unique "identity card" of the component. After taking out the mobile phone and scanning it, you can immediately see the detailed information about the component from the manufacturer's production to the construction process, so that the source can be traced.

According to reports, the steel structure of the two office buildings of the project requires a total of more than 11,000 components, with a total weight of more than 13,000 tons. The components need to be installed with a tower crane, which requires a total of 11,500 hoisting times. At the same time as the hoisting, the site has to be interspersed for structural construction. Limited by many factors such as the narrow site, coordination and cooperation are very difficult. In order to speed up project construction and improve installation accuracy, a BIM (Building Information Modeling) team was established at the beginning of the project. “We use BIM technology to actually simulate the lifting, installation and construction of steel components, and through careful planning and accurate grasp of the lifting time and installation sequence of each component, so as to improve construction efficiency.” Hao Han introduced, through BIM technology to optimize the design , Dredge production, facilitate installation, reduce costs, open up all links in the full life cycle of the steel structure, and lay a solid foundation for the high-quality performance of the project.

Install "smart chip" on the helmet

At present, more than 500 construction workers on the project site are sprinting towards the target node at the end of June, strengthening on-site management and control, and escorting the entire process with intelligent and information technology.

After a little attention, you can find that the project department, including the managers, are equipped with a small yellow circular device on the helmet, which is equivalent to a "smart chip", similar to the GPS positioning system installed on the car, through the signal The information exchange between receiving and sending and the system network can monitor the information of the personnel at any time. As long as people enter the venue, the activity track points can be displayed on the large screen of the visualization center of the project department. It can reflect the area where the worker is located in real time. If working at height, it can identify the height, which is equivalent to adding a safety protection to the worker. If you stay in a certain location for too long, it will also give an alarm to indicate that there may be a dangerous situation, which is convenient for timely detection and rapid disposal. "This kind of dynamic monitoring on the one hand facilitates the grasp of personnel attendance and improves the refined management of labor services; on the other hand, it can realize the intelligent management of safe production and build a strong barrier for safe production."

In addition, the project department also applies an online noise and dust monitoring system to continuously collect data such as dust and noise on the construction site for 24 hours. The LED screen at the entrance of the construction site is displayed in real time and can be viewed through mobile phones. When the value exceeds the warning, the system will alarm the first time, and the construction site can adjust the construction schedule in time. This spring experienced sand and dust weather, the project department formulated plans in advance and took decisive measures. On-site water trucks, turbine washers, fog cannon machines, and ring-field spraying were all launched to minimize dust pollution and create a green construction environment. Editor/Bao Hongying