The assembly rate is increased to 80%! Zibo City, Shandong Province has entered a new stage of development of bridge assembly construction

On the morning of December 8, a 320-ton crawler crane slowly lifted a prefabricated pier with a height of 8.9 meters and a weight of 65 tons at the site of the Changguo Road and Baoshan Road interchange project of the first phase of the Zibo Urban Express Road Network. It landed steadily at Pier No. 334 of the project. After about 30 minutes of intensive construction, the first prefabricated pier column of the expressway project was successfully hoisted, and Zibo entered a new stage of bridge prefabricated construction development.

With the success of the first hoisting, the bridge construction in Zibo City has realized beneficial attempts of fully prefabricated assembly of piers, cap beams, box beams, etc. The assembly rate has been greatly increased, and the assembly rate of the Baoshan Road project alone can reach 80%.

The first prefabricated assembly of the whole line

The pier is hoisted smoothly

"Get up! Okay, spin...slower, fall!" Under the precise "calibration" of technicians at the vertical observation points of the Changguo Road and Baoshan Road Interchange Overpass Project, the 38 grouting sleeve openings at the lower end of the pier column and the embedded steel bars above the cap are perfectly inserted together. The 8.9-meter-high, 65-ton prefabricated pier column falls steadily, and its hoisting accuracy is measured in millimeters. With the smooth hoisting of the first prefabricated pier, the construction of this section of the project has successfully entered the prefabricated assembly stage.

Construction staff prepare for hoisting

The prefabricated construction method used in the hoisting of prefabricated piers is to transfer a large number of operations such as traditional on-site pouring to the prefabricated beam yard. The production of prefabricated components such as piers, cap beams, box beams, etc. is carried out first. After the design strength is met, the prefabricated components are transported to the construction site for hoisting and assembly, that is, the factory "makes parts" and "builds blocks" on site. Compared with traditional construction methods, prefabricated construction can not only ensure the quality of the project, but also greatly reduce the construction period, and can effectively reduce the impact on the surrounding environment, making it more environmentally friendly and safer.

According to Zhang Peng, director of the Baoshan Road project of Shandong Dongtai Engineering Consulting Co., Ltd., in order to ensure the smooth hoisting of the first pier, the goal is to "implement the five requirements, promote the spirit of craftsmanship, and create a quality project", the technical staff conducts plan comparison and research in advance, and combs the process flow and related work of the installation of prefabricated piers in detail. A detailed plan is made for the problems that may occur during the installation of the pier. During the installation process, a professional team with experience in hoisting construction will carry out the operation, and the project safety, technology, and surveying personnel will monitor all aspects of the project, which fully guarantees the smooth hoisting of the first prefabricated pier.

Expressway project

5 smart beam fields have been built

"The production and installation of prefabricated piers are basically not restricted by weather, except for rain and snow. Up to now, all the 74 pier columns required for the construction of the main line bridge of the express road Changguo Road and Baoshan Road interchange have been prefabricated in the intelligent comprehensive prefabrication station of the Baoshan Road Project of the Eighth Bureau of China Construction, and only awaiting hoisting." The person in charge of the Baoshan Road Project of the First Construction Co., Ltd. of China Construction Eighth Engineering Co., Ltd. said with full confidence that the construction efficiency of prefabricated construction can reach about 10 times that of traditional cast-in-place bridge construction. It is expected that by the end of December, all the piers of the main line bridge of the overpass will be fully installed.

On the morning of December 8, two prefabricated piers were successfully hoisted. During the interview, the reporter was informed that in the construction of the first phase of the urban express road network in Zibo City, most of the bridge piers, cap beams, and box beams use assembly technology, and the prefabricated assembly components are used in the prefabrication station to adopt large-scale, standardized, and information-based production molding. . Under the conditions of more guaranteed product quality, more environmentally friendly treatment, and shorter construction period, the modernization and factory management of bridge component products have been realized, when the site conditions permit. In a short time, fewer workers can be used, rapid installation can be realized, and project safety, quality and construction period can be guaranteed. According to relevant statistics, compared with traditional cast-in-place technology, the assembly process can shorten the construction period by 25% to 30%, save water by about 50%, and reduce construction waste by more than 70%. It is of great significance to the surrounding environmental protection and is an important measure to implement the concept of park city construction.

According to Mu Shoufeng, a special class for the construction of the urban expressway network in Zibo, since the start of the expressway, Zibo has rapidly built 5 smart prefabricated beam yards in the city. This is the first large-scale construction of smart integrated prefabricated yards in Zibo. Since it was put into operation, the total production capacity of each station has been able to fully meet the current demand for expressway construction, which has laid a solid foundation for the smooth progress of project construction.

Zibo bridge construction and assembly rate increased to 80%

The interchange project of Changguo Road and Baoshan Road is located at the southeast intersection of the first ring of the "Two Rings and Five Rays" expressway network. It is an important node for the conversion between Changguo Expressway and Baoshan Expressway. In the construction of the first phase of the urban express road network in Zibo City, five interchanges will be constructed simultaneously at the South Square of the Railway Station, Jinjing Avenue and Lutai Avenue, Changguo Road and Lushan Avenue, Changguo Road and Baoshan Road, and Lutai Avenue and Baoshan Road. The design of the interchange overpass fully considers the traffic demand of the ring line to ensure the rapid passage and conversion efficiency of the ring line traffic. After completion, it will greatly improve the traffic operation efficiency of the inner ring.

Citizens who witnessed the hoisting process praised the expressway construction

"Prefabricated buildings are the key direction of the transformation and upgrading of the construction industry, which is conducive to saving resources and energy, reducing construction pollution, and improving labor production efficiency and quality and safety. The success of the first hoisting of prefabricated piers indicates that the bridge construction in Zibo City has achieved full prefabricated construction of piers, cap beams, box beams, etc. The assembly rate has been greatly increased, and the assembly rate of Zibo bridge construction can be increased to 80%. Since then, Zibo has entered a new stage of development of bridge prefabricated construction. "

At the scene, Li Qiang, the relevant person in charge of the special class for the construction of the urban expressway network in Zibo City, said that while the project construction is being promoted in an orderly manner, the project departments are catching up with each other and actively innovating construction methods and methods. At present, the whole line has fully entered the stage of fast-drying.