Building waterproof engineering is divided into three parts: basement, roof and interior
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Basement waterproof is the most difficult part of building waterproof engineering, and it is also the high incidence area of quality problems
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In case of leakage, the later repair is even more difficult! The draft of general code for waterproofing of building and municipal engineering has changed a lot in the working years of waterproofing engineering design
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However, the design life of underground waterproof engineering should not be less than the working life of engineering structure design, which shows the importance of underground waterproof engineering! Regulations on working years of engineering waterproof design in the first version of the draft for public opinions regulations on working years of engineering waterproof design in the second version of the draft for public opinions 01 the reason why underground engineering waterproof is higher and stricter than roof waterproof is that underground engineering waterproof treatment is higher and stricter than roof engineering waterproof because both sloping roof and flat roof are mainly drainage, and rain is the main reason The water stays on the roof for a short time, and can be drained from the downpipe or eaves into the sewer through organized or unorganized drainage
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Generally, the waterproof can not form the osmotic pressure
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Underground engineering is not
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Due to the limitation of terrain conditions, groundwater is difficult to degrade below the bottom elevation of underground engineering
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In this way, underground engineering will be affected by the harmful effect of groundwater for a long time
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The harmful effects of groundwater are shown in the following aspects: capillarity, infiltration, erosion, etc
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the damage from multiple sources ultimately affects the structural strength and use function
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In roof engineering, it is not easy to meet the above three harmful effects
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However, these three harmful effects must be seriously considered in underground engineering, and effective measures must be taken to prevent inundation, erosion and damage of groundwater
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Usually, it is not good to set up a single line of defense
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We must adopt the way of “comprehensive treatment and multiple lines of defense”
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The so-called comprehensive treatment means that effective treatment measures should be taken to prevent the harmful effects of groundwater from the aspects of engineering geological structure and construction
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The so-called multi line of defense does not mean that the more waterproof layers, the better
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Instead, structural waterproof treatment and ground drainage measures are all regarded as waterproof lines, which should be done well to reduce the harm of groundwater to underground engineering
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02 what are the main waterproofing methods for underground engineering? 1
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External waterproofing and external sticking waterproofing method: external waterproofing and external sticking method is to directly paste the membrane waterproof layer on the side wall (i.e
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the upstream surface of underground structural wall) after the construction of structural side wall (external wall of reinforced concrete structure) is completed, and finally make the protective layer of membrane waterproof layer
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It is still widely used because it can protect underground engineering structures from the harmful effects of groundwater erosion, infiltration and capillary action
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2
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External prevention and internal sticking waterproof method external prevention and internal sticking waterproof method: external prevention and internal sticking method is a method of building protective wall before the construction of structural side wall (reinforced concrete structural external wall), then sticking the membrane waterproof layer on the protective wall, and finally pouring the side wall concrete
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3
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Concrete structure self waterproof concrete self waterproof structure is to improve the compactness and impermeability of concrete itself by adjusting the mix proportion of concrete or adding admixtures, so that it has the ability of bearing, enclosure and impermeability, and can also meet the requirements of freeze-thaw resistance and corrosion resistance
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Links to previous wonderful articles: really can’t hold up, waterproof bosses are going to raise prices! 51200 + waterproof industry enters the era of delivery! 17355 + a waterproof boss asked for a few days’ account at the end of the year, which is a hot circle of friends! 14166 + Dongfang Yuhong’s speech on repair market analysis! 6600 + pay homage to waterproof people, a day for Chinese people! 5000 + Oriental Yuhong corporate culture / one three tree corporate culture! 5000 + ZhuoBao Zou Xianhua’s wonderful speech, waterproofing enterprises want differentiated development! 5000+。
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