Only two cars of garbage are cleared out of green security housing

In January this year, the State Council proposed the affordable housing in provincial capital cities, which will fully implement the green building standard since 2014. Recently, the Municipal Bureau of housing and urban rural development and the Municipal Bureau of planning promulgated and implemented the notice on the comprehensive implementation of green building standards for urban affordable housing, and the newly-built affordable housing in Kunming was "dyed green" one year in advance.

At present, green building has made remarkable achievements only in some first and second tier cities, which is still a new thing for many third tier cities. In Kunming, there are few green buildings, and high-end commercial housing will be built soon. Green buildings seem to be far away from people's life.

However, in dayantian plot of Wuhua Pan Asia science and technology new area next to the West Third Ring Road, a residential area with a total construction area of 250000 square meters is under construction, which is the "jihuiyuan" project of municipal unified affordable housing in Kunming in 2012. Different from other indemnificatory housing projects under construction or completed in Kunming, this is the first public rental housing project with green two stars and 30% residential building area reaching green three stars in Western China. It not only achieved the breakthrough of "zero" green building in the construction history of affordable housing in Yunnan, but also its practice was listed as an important reference index of green building standard in mild areas by the Ministry of housing and urban rural development. Kunming construction industry participated in the formulation of "national standard" for the first time.

Green construction runs through the construction process

"Jihuiyuan" public rental housing project is entrusted by Kunming public rental housing company to Kunming Vanke Real Estate Development Company for whole process agent construction management, and undertaken by the fifth construction company of China Construction Fourth Bureau.

In many people's impression, the construction site is a large number of reinforced concrete piled up in the site, pouring on site, the site is crowded, noisy, dusty, dirty air. However, at the construction site of jihuiyuan, what the reporter saw was clean and tidy cement road and flat ground, and there was no scene of dust and sewage overflowing.

Walking into the construction area, tower cranes stand in a forest, the sound of machines is booming, the workers are working nervously, and the construction site is busy. In the processing area, steel bars, wood and other materials are piled up everywhere The whole construction site is clean and orderly.

Although hundreds of construction workers were working on the site, not a cigarette end could be seen on the ground. It turns out that in each specific area, the construction party has set up temporary smoking points, workers can smoke in the construction, but the ash and cigarette ends should be put into the designated cigarette containers.

At the entrance of the fence, a special rest area was built to provide direct drinking water. There is a special cleaning area next to it, with a foot wash basin and a wash basin, so that workers can go to and from work cleanly and go out without muddy water.

The reporter noticed that there are four big blue trash cans beside the wall, each of which is pasted with instructions, such as recycling screws and ironware, recycling beverage bottles and cans, cigarette ends, cigarette boxes, cartons, plastic bags, instant noodle boxes, foaming lunch boxes and other garbage. "We implement waste classification at the construction site, which is a measure to actively implement environmental protection," said Huang zhejun, project manager of jihuiyuan of China Railway Fourth Engineering Group Co., Ltd. Traditional construction methods, in fact, cause a lot of waste of energy resources. During the construction, the requirements of "energy saving, water saving, material saving, land saving and environmental protection" are strictly followed. Even every Friday afternoon, the project department organizes managers and workers to participate in the "garbage collection" activities. By setting an example to promote environmental protection, the concept of "green construction" will run through the whole process of project construction, so as to realize the harmonious integration of human and nature, construction and environment. If the project with the same volume is constructed according to the traditional process, there will be 15 vehicles to transport the waste, but now only about two vehicles are needed.

Standardized construction of physical sample

The realization of green construction on the construction site also benefits from the application of a large number of new materials, new processes and new technologies.

On the roadside where the project department enters the site, Kunming Vanke and the fifth company of China Construction Fourth Bureau specially built a model exhibition area to explain various technical operation essentials and specifications of green building, which is rarely seen in various project construction sites in the past.

"This is the technical standard propaganda wall." Huang zhejun, project manager of jihuiyuan, said, pointing to the fence. The reporter saw that a fence more than 30 meters long was painted with a new one. On it were posters publicizing the technological process and operation characteristics of new materials, new processes and new technologies. The operation was standardized, detailed, illustrated, and full of impact and appeal.

In order to explain these construction methods in detail, the project department has also built a physical display area nearby, which can make workers understand the construction quality and effect of each process, and solve the problems of standards, processes, nodes and so on in an intuitive form. Such as the often neglected "basement floor waterproof construction technology", from the first step of base cleaning, the second step of brushing 1.3 thick bonding material, to the seventh step of 80 thick C25 fine aggregate concrete, each step has a demonstration sample. The jacking construction is detailed to the installation spacing of each step.

Through the demonstration of the model area and regular assessment, the technical level of the construction personnel is greatly improved, and the engineering construction quality is guaranteed. Two construction personnel also wrote their own experience. "I'm a carpenter, 35 years old. I have 12 years working experience in carpentry. I'm an old master, because everyone calls me master Li. I'm very happy. I'm glad that they've got nearly five hundred thousand apprentices a year. I think they've made a lot of money. After reading these samples, I found that I was wrong, because I taught my apprentices the wrong knowledge. Let's talk about the template engineering. I have seen the distance between poles, sweeping pole, diagonal brace, starting steel pipe, jacking, back side and reinforcement method before. Different projects have different standards, but I don't know what the real standard is. After reading these models, I really understand.

Another person named Zhou Jieming wrote the benefits of technical disclosure. "I am a technician with a certain theoretical level. Technical disclosure is one of my main tasks, which is also one of my difficulties. In the past, the technical disclosure was in the form of abstract and empty content, lacking persuasion. The workers were disgusted with it, and sometimes even I couldn't understand it myself. Now that I have these exhibition areas, I come here to study, compare the drawings and the specifications to see the samples, and then bring the workers here for disclosure. I'm glad to find that the workers also like it here. They still have a serious discussion here. With good interaction, the technical disclosure is completed in the sound of discussion, and the effect is pretty good. "

Building a house is like building blocks

In the demonstration area, there is also a two-story "temporary building". This building is an experimental building. According to the ratio of 1:1, the four rooms upstairs and downstairs are four bathrooms of different types, which are used to display the finished bathroom.

Huang zhejun said that in the past, the construction period of the toilet was long, a set of toilet took at least two weeks, and the site was dirty, chaotic and noisy, which would produce a lot of construction waste. Building materials resources are expensive, labor costs are high, and the construction quality is difficult to guarantee, tile laying is not smooth, often fall off, cracking and other phenomena.

Now it adopts the way of integrated bathroom, prefabricated products, materials of aviation materials, and standardized production by the factory, integrating bathroom facilities, water supply and drainage system, circuit system and other supporting facilities, organically integrating the three functions of bathing, washing and toilet. Not only the cost of procurement, transportation and installation is low, but also the cost of social resources is small, and the construction period is saved. Through on-site assembly and building block installation, it takes only 4 hours for two workers to install a toilet.

There are many construction methods of "housing industrialization" in the project site, which are directly assembled after being transported to the construction site, just like building blocks.

If the project adopts the technology of prefabricated inner wall panel, the factory prefabricated wall panel has been transported to the site. This kind of wallboard takes industrial ash and construction waste as raw materials, which belongs to environmental protection type green material. It has the characteristics of light weight, high strength, high sound insulation and excellent fire prevention, and the construction process is simple and flexible without plastering. The workers reinforce and assemble the "parts" in place according to the standard, which saves a lot of manpower and material resources compared with the traditional way.

In addition, the project adopts aluminum alloy formwork instead of wood formwork. This kind of environmental protection and energy-saving building material has small error in construction, and its verticality and flatness are higher than wood formwork. It can also be recycled, which is especially suitable for high-rise standardized construction.

In accordance with the requirements of "improving quality, improving efficiency, reducing labor" and housing industrialization, jihuiyuan project has achieved the goal of "three noes" of no hollowing, no cracking and no leakage by using new materials and new technologies such as aluminum alloy formwork, prefabricated interior wall panel and integral bathroom.

"Green" pushing up construction cost is a misunderstanding

The construction of affordable housing project has strict cost limit requirements. With such high standard construction and wide use of new materials and technologies, will green building significantly increase the construction cost and bring about the rise of rent or the price of price limited housing?

"It's a mistake, green