Recently, the General Office of the State Council issued the Guiding Opinion on Vigorously Developing Assembled Buildings. It is proposed that the prefabricated buildings should be promoted vigorously for about 10 years, so that the proportion of fabricated buildings in new buildings will reach 30%.
What is a prefabricated building? What benefits does it bring to your home?
Lofty tall "workshop “
When we talk about the construction site, most people's first impression is dusty, noisy, muddy water cross-flow ...... But if you have the opportunity to walk into the north of Henglida project construction site, you must Will not believe this piece of construction site to build more than a dozen storeys high.
Where is the prefabricated building?
In the 15th Live Expo 2016, the assembled interior decoration attracted visitors. Bright Daily reporter Qiu Yue photo / bright picture
A large number of high-noise, high-pollution "disturbing jobs" was moved to the factory floor, the project required prefabricated panels in the factory workshop in advance of the production is completed. When necessary, all the prefabricated panels are transported to the site. Through mechanical work and lifting work, the wall and column required for the building are ready to be put in place. In combination with on-site construction, a high-rise building is born.
Nowadays, such assembly-type buildings are being blossomed throughout the country.
In fact, as early as the 1980s, China had launched a large slab building but soon left the market. Many people worry that the development of fabricated buildings will not repeat the same mistakes?
"Due to the current economic conditions, as well as immature technology, especially waterproofing technology, hollow floor connection technology, there are major flaws and other factors, the board building was completely negated." Chen Yiming, chief engineer of the Ministry of Housing and Urban-built, said the assembly-type building And the board building is essentially different, will not repeat the mistakes of the development of large-panel buildings.
Deputy general manager of China Building Standard Design and Research Institute, explained that compared with other technologies such as large slab houses, prefabricated slabs and prefabricated beams, the prefabricated building is an upgraded product. With the continuous improvement of science and technology, The assembly of buildings has a clear quality standards, not only sound insulation, waterproof, sealed and other issues have been improved, seismic performance has also been greatly enhanced and improved, the overall performance of more and more able to withstand the test of practice.
Pipeline maintenance is no longer Chisel wall demolition
One of the advantages of an assembly house is the separation of the building from the plumbing. The various types of pipelines in the house are filled in separate interior trim walls and are not buried in concrete walls. "In this way, even after the admission of hydropower and other pipeline problems, do not have to cut the wall again." In the Shanghai Greenland Nanxiang Qingyi Park, a home owner said that "there is no load-bearing walls inside the room, all the load-bearing walls All are outside the building, so freedom to change the interior does not hurt the structure. "
Some people may ask, such a house safe? "Compared to traditional construction, the quality of floor components produced in the industrialization process is even higher." Lu Xiuke said that the traditional on-site pouring of floor slabs resulted in uneven floor quality due to differences in skill level of construction workers. The factory prefabricated components, in the process of uniform quality system, to achieve standardization, mechanization, meticulous production, quality assurance.
It is learned that the Ministry of Housing and Urban-Rural Development has conducted follow-up investigations on 13 prefabricated concrete building projects. The statistical analysis shows that compared with the cast-in-place buildings, the prefabricated buildings can substantially reduce the wood formwork, thermal insulation materials, plastering cement mortar and construction water , The consumption of construction electricity, and the reduction of more than 80% of construction waste emissions, while reducing carbon emissions and dust and noise pollution caused to the environment.
"Compared with the traditional way, factory production is not affected by the natural environment such as bad weather, the construction period is more controllable, and the production efficiency is much higher than that of hand work, which can shorten the construction time of about 1/4." Ministry of Housing and Urban Science and Technology Wenlin Feng, deputy director of Development Center said.
After the scale can highlight the cost advantage
Some construction enterprises or owners are worried that adopting assembly-type construction, most of their construction methods and personnel skills have to be changed and require a large amount of investment, resulting in a substantial increase in costs. In response, Hong Kezhu, former chairman of China Construction Third Engineering Bureau, said that the shortening of construction period can bring about labor costs and greatly reduce the financial costs. Besides, traditional scaffolds and protective nets are not required to be installed. According to a rough estimate, the general construction area exceeds 100,000 square meters Project, you can achieve significant cost savings. "
At present, China's prefabricated buildings in the proportion of new construction accounts for about 5%, a large gap with foreign countries. "In terms of cost, the cost of assembly-type buildings as the technology matures and industrialization forms, especially when the scale reaches a certain level, is lower than it is now." Su Yun-shan, director of the Building Energy Conservation and Technology Department of the Ministry of Housing and Urban-Rural Development, pointed out that "for example, some countries Of the cost of fabricated residential buildings, much lower than the traditional way of construction, the cost advantage is obvious.