Controlling smog Beijing is in action.
In response to the "sudden" smog weather, Beijing launched an emergency plan for heavy pollution days, * * * 58 enterprises stopped production, and 4/kloc-0 enterprises reduced pollutant emissions. As of 20 13,65438+10,13, 54 enterprises in Beijing reduced their emissions by 30%, and 28 construction sites stopped earthwork operations. Some construction units also take measures, such as controlling earthwork excavation, stopping demolition works, increasing sprinkling water on the construction site to reduce dust and covering bare soil to reduce air pollution.
A few days ago, Beijing municipal departments and relevant units inspected the construction units in Beijing to prevent dust pollution in the construction industry, and appealed to the general public to call 963 10 to report any illegal dust operation on the construction site. The relevant departments will impose a maximum fine of 654.38+10,000 yuan on illegal construction units.
Why should Beijing take a series of measures to control the pollution caused by construction? What harm will smog caused by pollution do to human body? Zhang Jinliang of china environmental science Research Institute pointed out that many air pollutants, especially PM2.5, will stay at low altitude for a long time when meteorological conditions are not conducive to pollutant diffusion. PM2.5 has obvious effects on respiratory system, cardiovascular system, immune system and nervous system.
Steel structure can reduce site pollution.
Is there a production mode that does not damage the environment and does not affect the construction site at the same time? Fang Hongqiang, chief engineer of Hanjia Design Group Co., Ltd. and president of Zhejiang Steel Structure Industry Association, said: There is a new building system that can break through the industrial boundaries between real estate, construction, metallurgy and machinery and equipment manufacturing and integrate them into a new industrial system, which is the steel structure building system. The steel structure building system can "work on the ground in the factory, do outdoor things indoors, do high-altitude things on the ground, do dangerous and complicated things with machines, simulate construction and set out computers on site." "Light, fast, good and economical" is a simple summary of steel structure architecture by Shen Zuyan, an academician of China Academy of Engineering and a professor of Tongji University.
Lightweight: the characteristic of light weight of steel structure buildings. According to Yang Qiangyue, chief engineer of Zhejiang Hangxiao Co., Ltd., the weight per square meter of steel structure building is about 0.8 ~ 1.2 tons, and that of concrete building is 1.5 ~ 2 tons.
Fast: the steel structure building has a high degree of industrialization and a short construction period. According to Shi Miaocheng, deputy general manager of Tianjin Southeast Steel Structure Co., Ltd., Tianjin Binhai International Trade Center 1 month with concrete beams can only complete four floors, while Tianjin Binhai Guotai Building 1 month with steel beams can complete seven floors. The reason why there are three layers of differences at the same time is that the steel beam only needs to be manufactured in the factory and installed on the site.
Good: The material performance of steel structure building is good. Ye Yaoxian, consultant chief engineer of China Architectural Design and Research Institute, said that in theory, the seismic performance of steel structure is better than that of reinforced concrete structure, which is mainly due to the homogeneity of steel. In addition, steel structures release less carbon dioxide.
Province: The steel structure building has the advantages of fast construction speed and saving time and labor cost. Fang Hongqiang said that some people say that steel structures are expensive. Where did this come from? Steel structure building not only considers the bearing capacity of engineering, but also considers the bearing capacity of ecology, which is a structural form with the least impact on the environment. Steel structure buildings are widely used in developed countries and are the main representatives of green buildings. Green building is the sublimation of simple building energy saving in the past. Based on the whole life cycle of the building, energy saving, land saving, water saving, material saving and environmental protection are considered. None of the steel structure buildings I designed are more expensive than the traditional concrete structure buildings.
Although steel structure buildings have many advantages, it is an indisputable fact that their share in China is only 5%, while steel structure buildings in developed countries such as the United States and Japan can account for 30% ~ 40%.
In fact, our government has been advocating the promotion of green buildings. As early as March 2006, the former Ministry of Construction issued the Evaluation Standard for Green Buildings (GB50378——2006), which was officially implemented on June 1 2006. At present, the Ministry of Housing and Urban-Rural Development is revising the evaluation criteria of green buildings.
20 1 1 In July, the Ministry of Housing and Urban-Rural Development issued the Twelfth Five-Year Plan for the Development of Construction Industry, requiring that the energy consumption per unit added value of construction products decrease by 10% and the proportion of steel structure projects increase; The engineering design of new projects shall meet the national building energy efficiency standards of 100%, and the buildings of new projects shall meet the requirements of the national building energy efficiency standards. The introduction of relevant policies fully demonstrates the determination of the Ministry of Housing and Urban-Rural Development in building energy conservation and emission reduction.
201212 On February 27th, the General Office of the People's Government of Zhejiang Province issued the Opinions on Promoting New construction industrialization. The opinion puts forward that according to the present situation of building industrialization in Zhejiang Province, with the modernization of housing industry as the starting point, affordable housing should be selected as the key demonstration project to promote building industrialization; By 20 15, Zhejiang Province will create 2 ~ 3 national construction industrialization bases or national housing industrialization bases; The construction area of prefabricated buildings in the province has reached more than100000 square meters, and the prefabricated assembly rate of affordable housing single buildings has reached 30%.
Green buildings will definitely be popular.
Document 20 13 65438+ 10/the State Council Office 1 is the green building action plan forwarded by the Development and Reform Commission and the Ministry of Housing and Urban-Rural Development.
The explanation of green building in the scheme is to save resources, protect the environment and reduce pollution to the maximum extent, and to provide people with healthy, applicable and efficient use space and live in harmony with nature during the whole life cycle of the building. According to the plan, green building action should be carried out, urban and rural construction should be guided by the concept of green, recycling and low carbon, mandatory standards for building energy efficiency should be strictly implemented, energy-saving renovation of existing buildings should be solidly promoted, resources should be intensively utilized, and the safety, comfort and health of buildings should be improved.
The plan defines the main objectives of the green building action. During the "Twelfth Five-Year Plan" period, 654.38 billion square meters of new green buildings will be completed; By the end of 20 15, 20% of new buildings in cities and towns will meet the requirements of green building standards.
In the part of promoting building industrialization, the Plan emphasizes that housing and urban-rural construction departments should speed up the establishment of a standard system to promote the design, construction and parts production of building industrialization, promote the standardization of structural parts and parts, enrich the types of standard parts, and improve universality and interchangeability. Popularize prefabricated concrete, steel structure and other building systems suitable for industrial production, accelerate the development of prefabricated assembly technology of construction projects, and improve the level of technical integration of construction industry.
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