Tang Xiuguo, President of Sany Group: Increasing the application of prefabricated vertical concrete structure technology

The development of prefabricated buildings is the only way for the construction industry to achieve high-quality development. At present, Chinese prefabricated buildings are developing rapidly, and a relatively mature prefabricated building system based on "prefabricated horizontal components + prefabricated enclosures and internal partition walls + prefabricated decoration" has been formed, and the core is gradually becoming "intelligent construction". The healthy development of the "new construction industrialization" direction. However, from the perspective of specific practice, when promoting the development of prefabricated buildings in most areas, the technology of "horizontal structure prefabrication + prefabrication of other non-structural parts" is still the main technology, and the overall prefabrication rate of concrete main structures is low. This has caused some impact on the promotion of the prefabricated concrete structure system and the full implementation of national policies. It is urgent to promote the prefabrication technology of vertical concrete structures.

On the whole, the current prefabrication technology of vertical concrete structures still has problems such as high cost, difficult installation, low construction efficiency, and difficulty in guaranteeing grouting quality. Here is a suggestion: On the one hand, construction companies should strengthen cooperation with universities and research institutes, and vigorously innovate and experiment in technology. On the other hand, the government should increase the promotion of vertical concrete structure prefabrication technology, build training platforms, and encourage corporate innovation in policies.

The authoritative experts of Sany Group in the United Nations have developed the SPCS3.0 vertical concrete structure precast technology with "cavity + overlap + cast-in-place" as the core. Formed the group standard CECS579-2019, which can realize the full prefabrication of wall columns and beams, and the full assembly of underground and ground, which greatly reduces the need for labor, and achieves the goals of resource conservation, environmental friendliness, intelligent construction, and green development. The project has been completed in Hunan, Shanghai, Tianjin, Beijing, Shandong, Chongqing and other places, with a construction area of nearly 1 million square meters. It is recommended that relevant government departments or agencies organize inspection, demonstration and promotion.