The earthquake in Ludian, Yunnan and the magnitude 5 aftershock that just occurred have made people alert to the earthquake again.
Chinese people have always been big buyers of Australian real estate, and China has surpassed India as Australia's largest source of immigrants. So, how does the quality of Australian real estate work? What is the difference between the quality of housing construction in Australia and domestic construction? Will Australia also suffer from earthquakes? If there is an earthquake in Australia, are the lives and property of the Australian compatriots still safe? It is understood that in the earthquake, 96% of the victims died because of the collapse of the building. In addition to population density, different building quality directly affects and determines the number of victims in the earthquake. For this reason, "Chinatown" made a special investigation——-
Australia is not in the earthquake zone to prevent hurricanes from becoming the focus of housing construction
From the perspective of geological structure, Australia is not a seismic zone.
Australia has recorded nearly 10 earthquakes in the past 3600 years. In terms of statistics, Australia is one of the most difficult areas in the world for devastating earthquakes. One of the worst earthquakes in Australian history was the Newcastle earthquake in 1989. This earthquake with a magnitude of 5.6 killed 13 people.
Victor Li of the well-known Central Equalty real estate development company in Melbourne told the reporter of Chinatown: “The relevant departments in Australia have mentioned less on the issue of building earthquake resistance, and emphasized the issue of building wind resistance. For example, the wind in Victoria is very strong, so the government The builders are required to consider the pressure on the wind when building houses, and there are also clear regulations on the index of wind resistance. At the same time, the government has also made clear regulations on the issue of house fire protection in recent years." Victor Li said: "Shockproof, as far as I know, there is no special emphasis." Jason Oskar, a graduate of the Department of Architecture of the University of Melbourne and a licensed builder, also agreed with this issue: “During my study and practice, I have not heard that earthquake resistance needs to be considered when building houses here, but the size and depth of the foundation Specific regulations". Victor told reporters that “the key consideration of Australian architecture is not the issue of earthquake resistance, but the consideration of phenomena such as foundation subsidence.”
Follow the British construction system to strictly control every process of housing construction
It is understood that in Australia, real estate developers only need to have the corresponding registered capital, apply for a license at the government department, and be established after registration. The Australian government does not stipulate that real estate development companies must have qualifications, but strictly stipulates that planners, architects, marketing planners, and Australian real estate intermediaries must have government-issued qualification certificates to practice. Australia’s large real estate development companies employ designers, architects, marketing experts, and market researchers, but most companies have only a few financial experts. For every house to be built, designers are invited to design and architects for advice. Proposing a construction plan and entrusting an architect to hire workers to construct is completely a contractual relationship. To build a house in Australia, as long as it meets the relevant government regulations, the whole process is entirely a personal act. Jason Oskar told a reporter from Chinatown: "In Australia, there are very strict requirements for house builders. Generally, there are no academic requirements, but they are required to have a professional certificate and three years of work experience. At the same time, they must Only recommended by someone who is already an architect." Victor Li added: "For high-rise buildings, the government has stricter requirements and audits for builders. In addition to being a member of the building association, there are many very detailed regulations." He said: "Australia has followed the British construction system, and their house building technology is excellent in the world. The houses here are generally considered with a lifespan of 3 years, so I often hear that The house is pursuing the "XNUMX-year plan". From this point of view, we can rest assured about the safety of Australian houses." At the same time, he also emphasized that "to build a house in Australia, you must not only comply with national requirements, but also must comply with the requirements of various districts and city halls."
According to a reporter from "Chinatown", "Australian builders are divided into Builder and Owner Builder. The difference between the former and the latter is that the former mainly builds houses for profit, while the latter only builds houses for himself because he needs a house. In this case, the quality may be a little worse. However, no matter what kind of builders build houses, they will be supervised by dedicated personnel from the Supervision Office of the City Hall. Usually they will monitor a house under construction three times, the first time When laying the foundation, they will ensure that the builders have not cut corners in the selection of materials, and whether they follow the specifications. The main reason is whether the number of steel bars is sufficient. The second time, when installing the wooden frame, check the electricity and gas. Whether the installation of water pipes is safe and meets the requirements; the last time before moving in, in order to ensure the safety of the residents, they will once again check the water circuit for hidden dangers, including whether the water pipes are leaking." He said: "Generally speaking, the Australian construction market is relatively standardized, and builders will be relatively disciplined in order not to lose their hard-earned licenses."
Australian private houses are mostly wooden high-rise buildings with hidden dangers
Mr. Lin Lizhen, a senior house builder in Melbourne and the president of the Victoria Fuqing Association, told the reporter of Chinatown: “All houses in Australia need to be tested for soil before construction starts. Engineers analyze the soil to see if the land should be What kind of house to build. Usually, the foundation of single-storey single-family and three-storey houses with wooden structure is 70 cm deep and 30 cm wide. But usually my house will be measured to 45 cm. Because it is inevitable in the measurement and construction process There is a deviation, it doesn’t matter if you add a little more cement, but if the foundation is not enough, the problem will be big. As for small high-rise buildings with three or more floors, mid-rise buildings and even high-rise buildings must undergo strict measurements and calculations before laying foundations. These are all engineers need The foundation of that kind of things may be deep."
Mr. Lin Lizhen also told reporters: “Civil houses in Australia generally have wooden structures, but also some wooden and brick-structured brick-wood structures. High-rise buildings generally adopt reinforced concrete or steel structures. For example, those with more than ten stories in the city center The buildings are basically reinforced concrete structures. Because these houses are mostly houses more than ten years ago, their seismic resistance coefficient is generally not considered. If a major earthquake comes, no one can guarantee it." Mr. Hu, the person in charge of BAO Engineering in Melbourne, told reporters: “As far as I know, the government has not made specific regulations on the seismic coefficient of civil buildings, but the regulations on the quality of building materials are very strict. What kind of building should be There are relevant regulations for the use of materials of that specification. These can be inquired in the relevant departments.
Finally, Australian Profile Mr. Shen believes: “The quality of Australian housing is relatively safe as a whole. First of all, the industry’s review requirements for builders, building material suppliers, designers and mechanical engineers are very strict. Second, according to It is stipulated that the current civil buildings generally advocate the use of light construction materials. The first point is to avoid the use of reinforced concrete and heavy materials as much as possible; second, for migrant buildings with more than two floors, light construction materials, such as foam and thin materials, must be used on the first floor. Cement board. On the one hand, it saves costs. On the other hand, if you encounter a disaster like an earthquake, there is no heavy object. The general gypsum board is not crushing. Because the house here is a wooden frame and a small amount of brick structure, So even if the wood and bricks are separated, the wooden structure of the house will not easily collapse because of its good toughness and mutual force."
The reporter noticed a detail in the interview. The real estate developers did not mention the earthquake resistance of their houses when selling their houses, especially high-rise buildings. At present, the issue of "five-star energy saving" is more frequently mentioned. Sunny Lu, Managing Director of Professional Real Estate in Melbourne, told the reporter of Chinatown that whether it is a new house or a second-hand house, in the transaction, the real estate agent generally will not introduce the earthquake resistance of the house to the customer, and the general customer will not ask this question. But I think the government should pay attention to this problem when formulating relevant regulations. After all, the geological situation is changing. If there is no problem, it will be fine. Once there is a problem, the consequences will be very serious. As an individual, when buying a house, you must pay attention to it. When paying attention to the area and shape of the house, you must pay attention to its earthquake resistance."