may affect the structural safety and stability of houses
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Today’s houses or other buildings are basically reinforced concrete frame structures or brick concrete and steel-concrete structures, and their seismic resistance, rain erosion resistance, corrosion resistance and other safety performance are greatly improved
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At present, 2 were lost contact
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Our production and life are inseparable from buildings
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Earthquakes, floods, landslides, debris flows, typhoons, tornadoes, etc
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For another example, on June 27, 2009, a 13 storey residential building under construction was “lying down”, which was mainly due to the fact that the north side of the building reached a height of 10 meters in a short time, while the south side was excavating a deep foundation pit of an underground garage with a depth of 4.6 meters, resulting in horizontal displacement of the soil under the action of the pressure difference between the north and south sides
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What factors will affect the safety of building structures? Rural “earth brick houses” in many rural areas, we can still see the earth brick houses built in the 1950s and 1960s, which are mainly stacked with “earth bricks”
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After more than four hours of rescue, a total of 9 trapped people were found and rescued, of which 2 had no vital signs, and 7 were slightly injured and sent to the hospital for treatment
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Generally, the service life of brick concrete structure houses built through professional design and construction is 50 years, while that of reinforced concrete structure can reach 60 years
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The reason for the “domino” type collapse of the 7-storey self built house involved in Rucheng, Hunan, is that it is not difficult to find that it has a great relationship with the instability of the foundation on one side of the collapse direction, and “netizens” said that they were “digging the foundation” before the incident
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The design life and service life of steel-concrete or brick concrete buildings
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At present, the accident site has been closed and the aftermath treatment and accident cause investigation are under way
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According to CCTV news reports, workers in the top floor waterproof construction process, the top floor collapsed, causing a total of 4 deaths and 7 injuries
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However, if the service life of the general house exceeds the design service life, even if the daily maintenance of the house, including waterproof and anti-corrosion, is well done, for safety reasons, it is best to ask a professional appraisal organization for regular inspection
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Of course, “one” and “two” can be collectively classified as “human factors”
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▲ Yuguo light repair ▲ Shengyang rubber plastic ▲ Sichuan Tongshen ▲ Dongfang Yuhong building repair at about 15:00 on August 8, the seventh floor of the top floor of Jiatian Investment Co., Ltd
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What should I do when a building collapses? Source: CCTV news, surging news, our video, Yancheng fire publicity, construction management, etc-
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Several factors affecting the stability of houses, so which factors will affect the stability of houses (buildings)? To sum up, it is mainly affected by three aspects: first, the quality of buildings; Second, illegal construction or exceeding the design load of the building; Third, natural factors
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Therefore, once buildings collapse, it is very easy to cause group death accidents
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The cause of the accident remains to be investigated
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Taking our country as an example, the design life of general commercial housing is 50 years, but the ownership life of housing construction property right is 70 years, and many communities generally become old communities in about 30 years
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The shed roof building on the 7th floor of the site building has fallen off to the interior on the 7th floor, three window frames on one side of the building have fallen off, and the indoor radiator is exposed
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After the accident, Heilongjiang Province Relevant departments of Harbin and Xiangfang District immediately arrived at the scene to organize rescue work
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For example, “Quanzhou Xinjia Hotel collapse accident” on March 7, 2020 is a major production safety responsibility accident mainly caused by building collapse due to illegal construction, reconstruction and reinforcement construction; For another example, the collapse of the Sanfeng department store in South Korea on June 29, 1995 was due to design omissions and a large number of businesses’ decoration exceeding its load, which eventually led to the collapse at the peak of the flow of people, resulting in 502 deaths
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Although it is a house built with “soil”, due to the high viscosity of the soil in the paddy field, which is relatively strong after repeated rolling, and the use of the characteristics of good permeability and waterproof of rice roots and straw, this “soil brick house” will not collapse even after decades of wind and rain under the condition of proper maintenance
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Therefore, in places where natural disasters occur frequently, we should learn more about disaster prevention and reduction
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The quality of buildings is inseparable from the drawing design, construction and the use of building materials
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The safety of buildings will be affected by incorrect drawing design, non-standard and discount construction, Jerry building, the use of low-quality building materials, etc
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Because the horizontal force exceeded the lateral resistance of the building pile foundation, Eventually lead to the house “lying down”
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The earth brick is made entirely from the ordinary soil in the rice field and the stalk left after harvesting the rice, and is made through repeated rolling, marking and cutting, air drying and other procedures
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This is the so-called “bean curd residue project”, such as the “1.4 Chongqing Qijiang Hongqiao collapse case” in 1999, Illegal design is one of the important causes of accidents
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At about 15:00 on August 8, when a building in Xiangfang District of Harbin was carrying out waterproof construction on the top floor (seventh floor), the floor collapsed, trapping 11 people on the site
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If the buildings are well protected, their service life (economic life) will be extended
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Of course, there are many situations of building stability caused by natural factors
Illegal construction, unauthorized transformation and exceeding the maximum load of the building design will also endanger the safety of the building
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located in Hexing Road, Harbin, Heilongjiang collapsed
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Until 21:20 that night, the other two were finally found, but they were sent to the hospital and died after rescue, The site has been closed, and relevant rehabilitation work is being carried out in an orderly manner
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