Tianjin continues to promote the construction of a prefabricated industrial chain, initially forming 14 characteristic bases

"Prefabricated building" refers to the transfer of a large number of on-site operations from traditional construction methods to factories, batch processing of components and accessories, and transport to the construction site, assembling and installing directly like building blocks, which not only improves efficiency, but also saves energy and environmental protection. As the first batch of prefabricated building demonstration cities in the country, the city continues to improve the prefabricated building industry chain to promote the green development of the construction industry.

At the construction site of Tianjin Metro Line 10, thousands of curved "cement rings" are arranged on the open space. After simple assembly, it can be turned into a circular cement pipe. This is a tailor-made fabricated tunnel segment for crossing the Haihe cable. Duan Hongliang, the person in charge of the project, said: The water depth of the Haihe River is about 20 meters, and it has relatively high requirements for seismic and compression levels. After research and development, the subway segment can be 100 meters underwater without water leakage and water seepage, and the appearance is not deformed.

This special segment comes from the construction and assembly company of China Railway Construction Bridge Bureau. In 2019, the company moved from other places to Tianjin Modern Construction Industrial Park in Jinghai District. Ai Fengquan, chief engineer of the production base, said: “Jinghai has a foundation in the steel and cement industries and can find raw material suppliers nearby. Taking advantage of the continuous advancement of the coordinated development of Beijing-Tianjin-Hebei, the base has received many orders after it was put into production.”

Tianjin's related raw material manufacturers cooperate more, and the fly ash produced by Hyde Runzi is used in our specific application. This year, we are the newly installed shield segment production line, which is to supply line 10, and the next step is Tianjin Metro Line 8. At present, there should be more than 20 projects in total, such as Beijing, Tianjin, and Xiong'an New District have a large number of participation.

Using the informationized docking platform built in the park, the China Railway Construction Bridge Bureau Assembly Company has recently launched a joint research on construction waste reuse projects with neighboring companies. Ai Fengquan, chief engineer of the company's production base, said: "Now there are more cases of siege of construction waste. There is such a company in Jinghai District. After construction waste is broken, it is used as a roadbed filler. We and the company have launched R&D and application to extend the use of recycled materials in concrete to a wider range. "

According to calculations, prefabricated buildings can save 50% of water, 80% of wood, and 70% of construction waste compared with traditional construction methods. This is the direction for the transformation and upgrading of the construction industry in the future. Jinghai District takes the development of prefabricated buildings as the starting point to promote regional industrial upgrading, and has established an industrial innovation alliance to continuously extend the industrial chain. Zhang Lingjun, deputy director of the Jinghai District Housing and Construction Committee, said: "We have built a comprehensive management platform to create a docking of the needs of companies covering the design, production, construction, and decoration fields of prefabricated buildings. Now there are 22 upstream and downstream companies in the prefabricated industry in the park, with a direct investment of 5 billion yuan."

At present, Tianjin has initially formed 14 characteristic industrial bases of prefabricated buildings. In the next step, the scope of implementation of prefabricated buildings will be further expanded and the level of green and low-carbon development in the construction industry will be improved. Wang Shi, director of the Science and Technology Department of the Municipal Housing and Urban-Rural Development Committee, said: "We have basically established an effective technical support system. The building and manufacturing base in Meichang Town of Wuqing, Tianjin Architectural Design Institute and Tianda Design Institute are the bases of prefabricated design, and the industrial base has the steel structure production base of Xiqing. During the 14th Five-Year Plan period, we will vigorously promote steel structure prefabricated buildings, optimize the overall industrial layout, and ensure that the prefabricated building industry in Tianjin can effectively serve the Beijing-Tianjin-Hebei region. "