On September 16, Typhoon 'Seagull' on the 15th this year attacked the west of the city and became the strongest typhoon in Shenzhen this year. Every time a typhoon crosses the border, the heavy rain brought by it has repeatedly tested the building's waterproofing.
It is well-known that leakage is a worldwide architectural problem. The industry has the concept of 'ten cracks and nine leaks', which is called 'building cancer'. Waterproofing is a basic link in construction, but unfortunately, the current state of building waterproofing in the country is not optimistic.
Roof leakage is quite serious
In April of this year, a heavy rain made the Shenzhen airport a state of razor-sharp. The leakage of the terminal building that had been in use for less than a year was like a sieve and was ridiculed by netizens as 'terminal leakage.' On July 18th, a concrete collapse occurred on the first floor of Shenzhen Luohu International Commodity Exchange Building. The accident caused 3 deaths and 12 injuries. Before the accident, there was a leaking crack in the building... Such a leakage event was not just in Shenzhen. appear.
In July and August of each year, it is the typhoon that ravages the season. In the past more than 20 days after “Weimasunâ€, traces of typhoon swept by Hainan Province were still visible. Some of the “skylights†on the building had not yet been restored and the underground garage was still available. Disputes caused by flooding are still happening every day. On August 28, Shijiazhuang, Hebei province suffered heavy rainfall. In just half an hour, Shijiazhuang's new train station waiting hall became a water curtain hole.
According to the survey, the current situation of building leakage in the country is quite serious. A total of 2849 building roof samples were sampled in 28 cities across the country, of which 2716 had different degrees of leakage and the leakage rate reached 95.33%.
In addition to the public buildings mentioned above, the leakage of newly built civil buildings is not optimistic. Shen Peihua, president of the Shenzhen Waterproof Professional Committee, introduced that there are three parts of modern architecture that are most likely to seep through and leak. They are exterior walls, exterior windows, kitchens, and basements. Compared to other parts of the building, waterproofing belongs to the small and micro industry. At present, there are more than 3,600 waterproofing enterprises in the country, Shenzhen has about 70, and last year's production value is about 250 billion yuan.
Although the output value of the waterproofing industry is much smaller than the output value of other links in the construction industry, it is a basic link in the construction, which relates to structural safety and living comfort.
Waterproof project contracting and construction supervision
In the industrial chain of China's construction industry, the waterproof industry is often overlooked and the industry presents many chaos.
It is understood that in the waterproof industry, the production capacity of formal enterprises with production licenses is less than 60%, and the number of SMEs with backward production processes and energy-saving and environmentally-friendly technologies is too high, and most of them are backward production capacity. What is more, there is no license production and system. Counterfeit dens have formed a semi-public "base." The serious excess production capacity leads to vicious competition in the industry. It is directly reflected in the production of waterproof products that do not meet the relevant national standards and the proliferation of inferior products.
According to relevant sources, waterproofing projects usually use the 'total package system', but the total package units often do not have waterproof construction qualifications. They subcontract out waterproof, decorative and other professional processes and lower prices to make profits. The sub-contracting company sub-licensed the glass and also subcontracted the construction work to other low-cost manufacturers. In addition, the supervisory system in the engineering field is in the form of failure to do a good job in the supervision of materials and construction, and directly creates a huge market for inferior or low-level products.
On the other hand, unqualified operation in the waterproof construction is also an important cause of leakage.
According to industry sources, the current waterproofing techniques and work methods lack relatively perfect standards, and construction workers lack excellent construction techniques and lack of understanding of the rigor of the operation steps, directly affecting the quality of waterproofing projects. This is always present during the construction process. The problem. Although there are specialized construction supervisors and quality monitoring stations, it is understood that supervision work is often not done well and is in a formality: they do not participate in supervision during the construction process, but perform an inspection after completion; The lack of government oversight also exacerbated the failure of waterproof construction.
Shenzhen establishes quality monitoring system
Building leakage is not unruly. The difficulty lies in the need to realize the harmonization of the five links of the system, waterproof design, waterproof material, construction process, and maintenance supervision. Shenzhen has always been at the forefront of the nation in dealing with building construction's 'cancer'. The Shenzhen Waterproofing Professional Committee established a set of quality monitoring systems that rely on the quality supervision system through industry self-discipline and self-discipline inspections, combined with blacklists and quality interviews.
From the status quo of the Shenzhen waterproofing industry, there are currently 46 products of waterproof companies entering more than 600 construction sites in Shenzhen. The quality of the products is uneven, and the existing regulatory power is insufficient to ensure the quality of the project. In this regard, people in the industry believe that it is necessary to combine waterproof material production companies, industry organizations, and governments (Quality Inspection Department, Ministry of Industry, Development and Reform Commission, and Housing Construction Department, etc.) to form a systematic quality monitoring network in the entire industrial chain of waterproofing projects so as to curb counterfeiting and inferiority. Flooding, improve the quality of Shenzhen construction waterproofing project.
In April this year, Shenzhen established the 'Shenzhen Waterproof Cooperation Organization'. All members of the organization signed the "Shenzhen Waterproof Industry Quality Self-discipline Declaration", all promised not to produce, not sell, do not use non-GB waterproof material, actively report fake and shoddy products, take the lead in purifying the Shenzhen waterproof market.
At the same time, under the strong support of the Shenzhen Municipal Construction Engineering Quality Supervision Station, Shenzhen launched a self-discipline inspection and sampling inspection. Every week, experts from the Shenzhen Waterproofing Committee organized experts to conduct random inspections on construction sites. Any unqualified sampler shall take measures such as issuing warning letters, interviewing responsible companies, publicizing the waterproof website, and notifying the competent authorities. It is understood that waterproof self-discipline inspection sampling has already formed a certain deterrent force for Shenzhen construction units, which effectively promoted the improvement of the city's waterproof market order.
Innovative technology and insurance system
On the morning of September 12, Shenzhen held a seminar on water quality improvement and zero defect waterproofing of buildings, and introduced a new type of waterproof system, zero-defect super sticking waterproof system.
Zero-defect waterproofing system was developed by Shenzhen Zhuobao Technology Co., Ltd. (hereinafter referred to as Zhuobao Technology). The 'skin-type' waterproof concept was adopted as a design concept. The waterproof combination of 'paint+coil' was selected, and the waterproof coating was uncured. Rubber asphalt, which is both a paint and an adhesive material. It can form a composite that has both a waterproof coating function and an adhesive material function, and also has a coiling function. It is feasible to make zero leakage of this complex, if it is damaged, because it has self-repair function, which can inhibit leakage. However, if the damage is large, there is still the possibility of leakage, and because it does not drown, damage points and leakage are generally corresponding, so it is relatively easy to repair.
At present, this construction method has been officially incorporated into the National Building Standard Design Atlas.
It is understood that the probability of construction leakage in developed countries and regions such as Europe, the United States and Japan is extremely low. A key reason is that they generally implement the waterproof project quality assurance insurance system.
Recently, Zhuobao Technology's zero-defective waterproofing system was jointly built with TPI Insurance's quality assurance insurance. It was the first of its kind in the waterproofing industry to insure the quality of construction materials by waterproof material manufacturers, and promised to 'double damages' in case of leakage. The person in charge of Zhuobao Technology explained that after the contractor of the waterproof project and Zhuobao Technology signed a waterproof project contract, the insurance company issued an insurance policy to the contractor of the waterproof project. If there is a leakage in the waterproof project, the contractor shall comply with the terms of the agreement and the waterproof project. The Employer will receive double compensation directly from the insurance company (ie, according to the risk unit area where the leakage point is multiplied by twice the unit price of the waterproofing contract for that risk unit).
Therefore, if there are more quality accidents in the company, the greater the risk and the higher the premium, so no firm dares to use fake and shoddy products and unskilled workers to construct, and the probability of building leakage will naturally 'continue to decline'.
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