318 meters! The world's pump king helped Changsha "Meixi Lake's tallest building" core tube capped

The tower becomes a mountain, Meixi Lake is water, the viewing island is a continent, and a landscape and a city are in the painting. On May 8, the Jinmao Meixi Building project in Xiangjiang New Area, Hunan Province ushered in the capping node of the core tube of the 318-meter main building.

With a total investment of about 3.5 billion yuan, covering an area of 18,500 square meters and a total construction area of 210,000 square meters, Jinmao Meixi Building project is the first project and commanding heights of Meixi Lake Super Central Axis.

At the beginning of the project, the concrete pouring construction of the large floor of the main building of Changsha Jinmao Building was started. After 68 hours of fierce battles day and night, the concrete pouring of the large floor of the main building of Changsha Jinmao Building, developed and constructed by Changsha Fangxing Xingye Real Estate Co., Ltd., undertaken by Zhongnan Branch of China Construction Fifth Bureau Third Company, and pumped by Changsha Dingchen Machinery Equipment Leasing Co., Ltd. was successfully completed.Five Sany C10 series pump trucks worked hard overnight to achieve "on-time arrival" and "0" failure of pumping, and the single-power amount of concrete pouring also created a new record in China's Jinmao Central China region.

As the height increases, so does the difficulty of project construction. "The core section has undergone two indentations, which brings great challenges to the construction of the structure." Fang Ning, the chief of the core tube building of the project, said. The project not only exceeds the height limit, but also faces the problems of twisting irregularities, sudden changes in size and bearing capacity, etc., and belongs to a complex high-rise building with double overrun of height and irregularity.

In order to ensure the stability of the super high-rise structure, the project is equipped with ring belt trusses on the 20th and 38th floors. The hybrid structure of frame-core tube with X-ring frame reinforcement layer can effectively improve the lateral stiffness and torsional stiffness of the overall structure, and improve the seismic and wind resistance of the structure. At the same time, the project adopts the internal support and external climbing system (the internal use of scattered aluminum mold, the external use of climbing formwork), and the synchronous construction of horizontal and vertical structures, which effectively solves the construction problem after the core tube is retracted.

On May 8, at the construction site, Xie Zhenwei, the quality officer, was checking the concrete pouring situation, and the project wanted to transport 500 tons of concrete to an altitude of more than 300 meters through the method of "one pump to the top", and "go straight to the sky" within 6 minutes to complete the capping and pouring of the core tube. Due to the pumping pressure in the concrete pump pipe is as high as 21MPa, the project specially set up the ultra-high pressure concrete pump pipe to ensure that the pipeline has a stable anti-explosion ability during the pumping process, and installed a hydraulic electric placing machine as the terminal equipment in concrete conveying.

Finally, Sany 11030C-10On-board pumpsThe successful completion of the pouring task has won unanimous praise, "worthy of being the world's pump king!" ”

"Since the start of the project, more than 600 builders have worked hard during the peak period to promote the construction with high efficiency and high quality in three days, and it is expected to be fully capped by the end of May this year." Project manager Li Meng said.It is understood that the Jinmao Meixi Building project is undertaken by Zhongnan Company of China Construction Fifth Bureau No. 3 Company, and the company has always adhered to the concept of green and sustainable construction, deeply combined with the long history and culture of the territory, and built a "modern new city" that the people yearn for through the close combination of nature, construction, humanities and other elements.