However, there are still many urgent problems to be solved in the support and guarantee of the top-level design of the technical specifications and standards of construction methods, and there is still a big gap compared with the international development of precast buildings and their advanced construction methods.

At the same time, they are also important for transforming the construction development mode, breaking the bottleneck constraints of energy and resources, cultivating new strategic industries such as energy conservation and environmental protection, and promoting the construction of a resource-saving and environment-friendly society, It is of great significance to fundamentally promote the circular development of economy and the sustainable development of society.

It is urgent to vigorously promote the major reform of construction mode.

Since the reform and opening up, it has been a consensus that the construction industry has become a pillar industry of the national economy.

The preparation of the two standards highlights that the precast building should ensure the long-term quality of complete building products, advocate full decoration, the interior decoration system should be designed and built with the structural system, peripheral protection system, equipment and pipeline system, adopt the integrated parts of industrial production, and advocate the implementation of assembled decoration.

The development and upgrading direction of precast building construction should pay attention to comprehensively improving the standard level, enhancing the awareness of long-term development, and moderately improving the requirements of the standard for technical indicators such as safety quality, performance quality, energy conservation and environmental protection and building life.

The preparation of the two standards highlights that the precast building should comprehensively improve the housing quality and quality, reduce the later maintenance cost of the building, and prolong the service life of the building.

The two standards for precast buildings are not only an important measure to implement the modernization of the construction industry and promote the industrialization of new buildings, but also an important path to implement the green building action.

To this end, the Ministry of housing and urban rural development is responsible for the management, and China architectural standards design and Research Institute (hereinafter referred to as the “Standards Institute”) has taken the lead in the preparation of two standards: technical standard for precast concrete buildings (GB / t51231-2016) and technical standard for precast steel structure buildings (GB / t51232-2016).

Precast buildings represent the direction of a new round of scientific and technological revolution and industrial change in the construction industry.

The two standards of precast building creatively build a precast building with industrialized construction mode – a process of system integration of the whole profession and the whole process – which is based on the industrialized construction mode to realize the integration of four systems, including structural system, peripheral protection system, equipment and pipeline system and interior decoration system, as well as the integration of planning, design, production and construction.

The third is the direction of “full coordination”..

They are composed of general principles, terminology, basic requirements, architectural design and integrated design, production and transportation of construction parts, construction and installation, acceptance, use and maintenance.

The second is the direction of “life cycle”.

However, for a long time, the problems of high energy and resource consumption, low labor productivity, weak technological innovation, low construction quality and certain hidden dangers in project quality and safety in the construction industry have not been fundamentally solved.

They are conducive to saving resources and energy, improving labor production efficiency and quality safety, and promoting the deep integration of the construction industry and information industrialization Cultivate new industries and new driving forces.

The technical standard for precast concrete buildings (GB / t51231-2016) and the technical standard for precast steel structure buildings (GB / t51232-2016), which are managed by the Ministry of housing and urban rural development and led by China architectural standards design and Research Institute (hereinafter referred to as the “Standards Institute”), have been officially issued and will be implemented from June 1, 2017.

In the preparation process, we have carefully summarized and absorbed the mature experience of relevant technology and design practice of precast building integration at home and abroad, referred to foreign advanced standards, combined with domestic research results and the actual situation of construction engineering, and absorbed the new achievements of precast building in recent years.

The technical direction and characteristics of the preparation of the two standards have five aspects: the first is the direction of “whole building”.

Its technological integration innovation is reflected in clarifying the concept, connotation and top-level design of precast buildings; For the first time, four building integrated systems of precast buildings are constructed; Put forward the system integration design of precast building; Take the building as a complete product for overall design; The sustainable quality technology in the whole life cycle of precast buildings is emphasized; Put forward the construction mode requirements for the “six modernizations” of precast buildings.

The framework of each chapter takes the improvement of the overall top-level design innovation guidance of precast buildings as the core, highlights the integrated architectural characteristics of the complete construction product system of precast buildings, focuses on the industrialized production, installation and management methods of precast components of complete construction products, and solves the basic problems of realizing the innovative development of precast construction methods.

While adhering to the combination of international vision and comprehensive innovation and improvement of standard content and technical measures, we pay attention to the long-term and improving quality and efficiency to improve the standard level of precast buildings, comprehensively improve and create a new standard and specification system of precast buildings.

The two basic standards of the four basic building blocks for integrated system are the advanced and forward-looking standards.

In recent years, China has actively explored the development of precast buildings.

It shall meet the use and maintenance requirements of the whole life cycle of the building, and the precast building advocates the separation of the main structure and equipment pipelines.

Specifically, these two standards have the characteristics of four foundations, five directions and six principles.

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Precast building the key of system integration of precast building specified in the two standards includes four foundations: first, it emphasizes that the construction of precast building is the characteristic of system combination; The second is to solve the problem of coordination among the four systems; Third, solve the problem of coordination within each system; Fourth, highlight the overall performance and sustainability of precast buildings.

We specially invite Liu Dongwei, the main preparation expert of the two standards, to deeply interpret the “four five six” characteristics of the standards for you.

They are not only a major change in the construction mode, but also an important measure to promote the supply side structural reform and the development of new urbanization.