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Glass screen wall ---which once was the mark of modern big cities
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Glass screen wall which once was the mark of modern big cities, now has become a bomb hanging over the head of we human beings. Glass screen wall as a wall has a history of 60 in construction design, but in recent years, accident about the broken glass screen wall happen time to time, and the light pollution of glass screen wall have been controversial. Besides, the problem of self explosion and high energy consumption is getting more and more attention and accuse.
Glass screen wall is not welcomed in many places.
    Recently, limit and replace this kind of words was frequently appears in many official documents, it seems that the control of glass screen wall is going to be strict.
    Not too long ago, Wuhan CPPCC members suggested in the proposal, to control the use of glass screen wall in building gradually, and use light alumium alloy to replace glass screen wall gradually. Government should stop using glass screen wall as soon as possible. If it is necessary to use glass screen wall, we should make sure that the area of glass screen wall is less than 20% of the surface of outside wall, according to the buildings surround, analyses of the light reflect situation and make an announcement to the citizen about its influence.
    In Changsha city political consultative conference (CPPCC), the first session of the 11th, there also some proposals suggested to limit the use of ceramic tiles, glass screen wall and encourage to use granite and other material.
Even earlier,Jiangsu province release a more strict rules to the use of glass screen wall. According to the rules,the invisible frame glass screen wall has already been forbidden, not normal big glass screen wall was strictly controlled, if it cannot avoid, the user should get the technic certificate. If it is used in the crowd, the area should be limited and the construction team have life long duty to the project.Besides, Wuxi also release some relative policy, it is not allow to use glass screen wall in new building, reconstruction building,expansion building and the facade renovation of the hospital, school these kinds of projects, should not use glass screen wall the second floor up.In T intersection is in straight sections of the building, and shall not use glass screen wall.
    According to understand, in view of the overage service glass curtain wall, at present only Shanghai do have special management system, where more than life be clear at a glance.
    In Shanghai, jiangsu have strict control glass curtain wall for new project later, zhejiang province housing and urban and rural construction and then released the building screen wall construction safety technical requirements ". The "technical requirements" not like Shanghai that banned glass curtain wall in residential use, but emphasize "strict control"."Technical requirements" drafter of zhejiang province is one of the architectural decoration industry association secretary general party branch of curtain wall, said: "this is a high-grade building dish to use glass curtain wall leave some leeway, considering the image of the city and building dish positioning.
 In fact many countries has clearly put out glass curtain wall, the light alloy material substitution, such as Germany forbids the use of large area glass curtain wall, glass curtain wall in Japan, the United States also use is limited only guarantee the ten years don't fall off.
    Glass curtain wall is a new form of building exterior wall decoration, has modern building concise bright notable features, began in the United States after world war ii in the high-rise building (the mid-twentieth century), then in the world within a wide range of applications.
    From the early 80 s, glass curtain wall in China began to popularize the use of domestic, and once big popular, so far our country has is curtain wall glass production and use of power.
    Due to the use of glass curtain wall is convenient and short time limit, appearance has fully, the contemporary feeling, make its in the present a lot of urban construction is widely sought after. Now high, tall buildings often use glass curtain wall, a big part of the reason is design preferences, glass daylighting sex is good, visual effect is good, such as the entrance of the subway station, underground supermarket entrance.
    Now in our country in the large and medium-sized cities in the glass curtain wall of modern buildings everywhere, however, because most of the building curtain wall design structure is unreasonable, or the presence of construction quality problems, and part of the building curtain wall in the construction and operation and maintenance process regulation is not in place, easily happened glass curtain wall glass explosive, fall off events, to the people's life and property loss, become a big city public security hidden danger.
    The light pollution is caused by repeatedly for. Some glass curtain wall can be reflected strongly dazzling light, led to the running in the car driver is strong "shot", make the line of sight short time fuzzy, easy cause accident.
    In addition, its insulation and lack of warmth retention property. Building energy consumption in China is the same climate conditions of building energy consumption in developed countries twice to three times, glass than traditional building materials or easy to lost heat or produce the greenhouse effect, in hot summer and cold winter. The wall of large area glass curtain wall, the surface to see is large area lighting, save a part of lighting electricity, but in winter and summer, because indoor temperature low or high costs a great deal of energy. Data show that built 10 years glass curtain wall of the whole building energy consumption of about 50%, is "the major energy consumers".
    This a series of disease means glass curtain wall is not like it appearance brings a person so good modern feel.
    Moreover, glass curtain wall bright and clean and transparent a born beauty is not resistant to pollution, especially in atmospheric dust load more, air pollution, drought less rain in the north, glass curtain wall easily cheat dirt accept dirty, the city landscape is concerned, not only cannot be added "light", it will lose "face".
    Not long ago Beijing foggy, which have already high PM2.5 view will be blamed in part on glass curtain wall of large area is used. It is noted that, some of urban construction not environmental protection design trend, increasing the burden of coal, not only hindered the energy conservation and emission reduction, and the serious influence our air quality.

Glass curtain wall show the disadvantages of obviously become "chicken ribs" in the construction of buildings, once suffered dispute, even a lot of place to stop.
    How to become the development of energy saving glass curtain wall is not open around the first proposition. In fact, the glass curtain wall own innovation reform also never stop. Beijing has the double respiratory curtain wall construction completed the basic mechanism construction, known as "will breathe a glass curtain wall". It is reported, this new type of glass curtain wall buildings, energy conservation and environmental protection performance will be the highest increased by 60%, and can play the sound insulation effect.
    The respiratory curtain wall from inside and outside two layers of glass curtain wall, and compared the traditional curtain wall, it is the biggest characteristic of the internal and external two layer between the curtain wall to form a layer of ventilated take a breath, because the air layer air circulation or cycle in the role of the inner wall temperature close to the indoor temperature, reduce temperature difference, so it than traditional curtain wall when heating energy saving 42% ~ 52%; When the cooling energy saving 38% ~ 60%. Plus, because of the use of double skin facade, the curtain wall of sound insulation effect has been greatly improved
    Photovoltaic glass curtain wall to the appearance of the glass curtain wall energy-saving "soft rib" provides a breakthrough. It is reported, wuxi "built in the the world's largest, with an area of about 18000 square meters of pv energy consumption low ecological architecture suntech power headquarters office building, the office building is adopted photovoltaic glass curtain wall and solar photovoltaic building integrated materials, through the photoelectric effect of solar energy into electrical energy, directly to the office building for" green electricity ". The high-rise building glass curtain wall to pv glass curtain wall, also can use the hair "green electricity" straight for peripheral underground rail transit use.
    The concept of ecological intelligence glass curtain wall also arises at the historic moment. In the glass curtain wall of different level spacing between large implementation of greening, such as in the high-rise building safety layer built outside air garden and leave air vents, can make the whole building to produce air circulation and air exchange, overall to good effect.In addition to every glass block between the vertical position widened, become green glass belt, green glass with points inside and outside two layer, the outer layer is the opening up of the mesh shape or shutter shaped synthetic organic substances, to be able to store large amounts of water, provide vertical plants, the use of plant root moisture absorption and adsorption, let the plant growth in curtain wall between the steel frame or glass block between, lining is closed, open shutters, its use is in the right time to avoid the influence of the outside world.This can not only solve the problem of light pollution, and can solve the greenhouse effect. Specifically, it strengthened the curtain wall outside surface and the surrounding air and outside environment between the convection heat transfer, curtain wall inside surface and indoor air and indoor environment change between the heat, curtain wall and metal frame's heat transfer, through the glass coating layer to reduce the radiation heat transfer, etc.
    Glass curtain wall obviously can't simply sunk development, only breakthrough energy saving and technical innovation, problem, can take glass curtain wall of your destiny.

Infotime: 2013-1-25 10:10:49    Print    Back home
 
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