At the same time, some other provinces and cities are also gradually developing on a large scale.

As a new construction method, precast building can promote the traditional construction industry to leap from a decentralized and backward handicraft production mode to a socialized large-scale industrial production mode based on modern technology, which is conducive to achieving the goal of “two increases and two reductions” of “improving quality, improving efficiency, reducing labor, energy conservation and emission reduction”, so as to improve labor productivity, improve working environment and reduce labor dependence, Enhancing the contribution of the construction industry to the realization of the goal of “carbon peak and carbon neutralization” is the only way for the transformation and development of the construction industry.

In the 1950s, China introduced precast buildings in China based on the experience of the former Soviet Union and Eastern European countries.

From the type structure of precast buildings, 430 million square meters of newly started precast concrete structure buildings, an increase of 59.3% over 2019 and 68.3% of newly started precast buildings; Precast steel structure buildings are 190 million square meters, an increase of 46% over 2019, accounting for 30.2% of newly started precast buildings.

According to the statistics of the Ministry of housing and urban rural development, the area of newly-built precast buildings in China increased year by year from 2016 to 2020.

According to the data of the national report on the development of precast buildings in 2020 issued by the Ministry of housing and urban rural development, by 2020, 328 National precast construction industrial bases had been established, accounting for 27%; There are 908 provincial industrial bases, accounting for 73%.

In 2020, the proportion of newly started precast buildings in key areas will account for 54.6% of the country, reaching 343.98 million square meters; Actively promoting and encouraging areas accounted for 45.4%, reaching 286.02 million square meters, and the proportion of key areas was further increased compared with 2019..

16-20 new construction area and proportion of precast buildings in China 2.

The work goal of reaching more than 15% by 2020 set in the action plan for precast buildings in the 13th five year plan has been completed.

In 2020, the newly started precast buildings in 31 provinces, autonomous regions, municipalities directly under the central government and Xinjiang production and Construction Corps totaled 630 million square meters, an increase of 50% over 2019, accounting for about 20.5% of the newly-built building area.

At present, China’s construction industry is still a labor-intensive traditional industry dominated by cast-in-situ construction, and the construction products provided by traditional construction methods can no longer meet people’s good needs for high-quality construction products.

In the 21st century, under the background of “strict environmental protection + labor shortage”, precast buildings usher in a new opportunity for development.

In recent years, the promulgation of a series of policies has accelerated the development of China’s precast construction industry from the aspects of industry norms, project support and the construction of technical supervision system.

Scale of industrial base: the two-level bases develop together.

Project type structure: PC structure buildings account for the largest proportion.

With the active promotion of precast construction projects in various regions, the scale of new precast buildings in China is growing.

In the 1980s, due to the poor seismic performance and the emergence of problems such as waterproof and sound insulation, the development of precast buildings entered a low period.

Construction area: the newly started area and its proportion have increased steadily.

The precast steel structure integrated module building has been rapidly promoted and played an important role in the prevention and control of COVID-19.

Distribution of structural types of precast buildings in China in 2020 3.

Under the background of transformation and upgrading of manufacturing industry, the central government has continuously issued relevant policies to promote the development of precast construction industry.

Regional distribution of the project: the regional process is advancing steadily.

Coil Insert

In October 2021, the CPC Central Committee and the State Council issued the opinions on completely, accurately and comprehensively implementing the new development concept and doing a good job in carbon peaking and carbon neutralization, which proposed that the proportion of non fossil energy consumption should reach about 20% by 2025; By 2030, the proportion of non fossil energy consumption will reach about 25%; In 2060, the proportion of non fossil energy consumption reached more than 80%, and carbon neutralization was successfully realized.

According to the statistics from 2017 to 2019, the newly started precast buildings in key areas are 75.11 million square meters, 135.38 million square meters and 196.78 million square meters respectively, accounting for 47.2%, 46.8% and 47.1% of the whole country respectively.

China’s precast buildings have developed for nearly 70 years, from manual operation to mechanized production, from reference to self innovation, and have experienced both highs and lows.

With the enhancement of policy drive and market endogenous power, the precast construction industrial base develops rapidly.

1.

According to the notice on the development of national precast buildings in 2020 issued by the Ministry of housing and urban rural development, Beijing Tianjin Hebei, Yangtze River Delta and Pearl River Delta are the key promotion areas, other cities with a permanent resident population of more than 3 million are the active promotion areas, and other cities are the encouraged promotion areas.

Since the introduction of the central government’s policies on the rapid development of shear wall and assembled building technology, China has ushered in a variety of new development stages, such as the introduction of the central government’s policies on the rapid development of assembled structure and assembled building technology.

4.

As of 2021, the summary of important policies of China’s precast construction industry summarizes the current development situation of the industry.

Therefore, China needs to vigorously develop precast buildings.

Among them, 12.06 million square meters of cast steel structure residential buildings were newly started, an increase of 33% over 2019.

The enthusiasm of domestic industrial construction was high, and the precast buildings dominated by concrete structure developed rapidly.

2016 is the beginning year of China’s precast buildings.

In September of that year, the general office of the State Council issued the guiding opinions on vigorously developing precast buildings, which pointed out that the precast construction industry should be developed from multiple levels and angles.

Precast buildings continue to lead the development of the whole country in the Eastern developed areas.

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