Compared with traditional construction methods, precast buildings have obvious advantages in environmental protection, energy conservation and efficiency.

Dry construction is adopted in the process of assembly decoration.

Energy conservation and environmental protection.

The controllable factory production environment can better ensure that the quality of precast components and parts meets the standard requirements, and then assembles precast components and parts into building entities through on-site assembly, reducing a large number of on-site wet operations in traditional construction, and effectively reducing the prevention of cracking, leakage, hollowing, component and room size deviation Common quality problems, such as pipeline quality problems and fire safety hazards, to improve the quality of houses.

The three types of buildings have their own characteristics.

Based on the proportion of construction period reduction and the proportion of on-site labor saving, the current housing industrialization mode in China can improve the comprehensive efficiency by about 150%.

According to statistics, the fully cast project can save 3/4 of the construction period compared with the traditional construction method, and the cast construction can save at least half of the manpower compared with the traditional construction method.

Plate Anchor

It is not only reflected in the generalization of main structural components, but also reflected in the socialized production and commercial supply of various products and equipment.

The fundamental change in the management mode of the construction industry lies in the introduction of industrialized production management mode through the industrialization platform, so that the management mode can be changed from extensive management to intensive management, and the flexibility and efficiency of management can be improved.

These components are characterized by good structural performance, multiple uses, great versatility and easy mechanized production.

Users can freely buy the products they need from the market through the product catalog.

The housing industrialization decomposes the housing into different parts, and processes and manufactures the parts in the factory.

According to the Statistics of New Residential Buildings issued by the Ministry of Land and Transport of Japan, the penetration rate of precast buildings in Japan was only 15% by 2015, and since 1986, the proportion of newly built precast households in Japan has fluctuated from 15% to 20%, which on the surface shows that the pace of development of Japan’s construction industry has basically stagnated.
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Its main characteristics are as follows: the mode of production and management has changed.

The construction site is free of fire, water, dust and smell, welding and cutting, cement and gauze, which can effectively reduce noise pollution, dust pollution and water pollution.

In addition to the precast houses produced by the factory and the precast components and parts of the wooden frame structure supplied in a complete set, other concrete components and products, lightweight panels, indoor and outdoor decoration and equipment are also very rich, with tens of thousands of varieties.

Building quality and performance are improved.

Relevant researchers conducted a systematic and comprehensive environmental impact assessment on the construction process of representative industrial houses and traditional houses, and calculated that the construction of industrial houses per square meter reduced resource consumption by 23%, ecological damage by 3% and health damage by 7% compared with the construction of traditional cast-in-place houses.

The construction waste is significantly less than the traditional on-site pouring method.

Because the precast components of the precast building are completed in the factory, the installation can be completed quickly at the construction site, which shortens the construction period and saves on-site manpower.

The housing construction in the United States is based on the extremely developed level of industrialization, with the characteristics of coordinated development of various industries, high labor productivity, industrial agglomeration, developed factor market, and large domestic market.

According to the statistics of the Ministry of Housing and Urban-Rural Development, precast concrete buildings are the main precast buildings in China at present, accounting for about 65% of the total precast building area in 2019, while precast steel structures account for about 30%, and precast wood structures account for about 5%.

According to statistics, the standardization, serialization, specialization, commercialization and socialization of residential components and parts in the United States are very high, almost reaching 100%.

The key is to be able to industrialize construction workers and greatly expand the source of industrial labor.

⏵ 2.

In terms of specific application, precast construction means that the key components and parts of the building are produced in a standardized way in the factory, and then the installation construction, main construction and decoration are synchronized in a precast way on the site, so as to connect the whole process of building production into a complete industrial system, so as to realize the integrated process of building production, supply, sales and service.

At present, the biggest problem facing China’s construction industry is the shortage of labor.

At the same time, housing industrialization can not only effectively guarantee the quality of housing, but also help to improve the various performance of housing and make up for the performance defects of traditional housing.

The transformation of industrial production mode is mainly reflected in the transformation from on-site manual operation to factory mechanization and automatic production, from labor-intensive to technology-intensive, from single-piece customization to mass customization, and from extensive production to intensive development.

Figure 1 Three types of precast buildings – 2 – The development of overseas precast buildings – 1.

Operation efficiency is improved.

According to the main structural components of the building, precast buildings can be divided into three categories: precast concrete buildings, precast steel structures and precast wood structures.

According to statistics, since 2015, about 4/5 of the assembly-type component components have been sold to traditional builders, and a large number of ordinary large builders have purchased assembly-type component components and their components by acquiring factory manufacturers of assembly-type component components or establishing partnerships; In fact, looking at the development of precast buildings in the United States from another perspective of industrialization, we can find that the proportion is very high.

From the perspective of overseas industry development experience, its popularity is very high, and there is rich experience to learn from, which determines that precast buildings will become the only way to transform and upgrade China’s construction industry 1 – Assembled building – the industrial revolution in the construction industry Assembled building is a building assembled with precast parts on the construction site.