Is it difficult to inspect precast buildings? CCTV attention! The “magic weapon” of China Construction First Bureau has been solved
Recently, CCTV13 and the China Construction News, the director of the Ministry of Housing and Urban-Rural Development, have paid attention to the “magic weapon” of the quality inspection of precast buildings independently developed by China Construction First Bureau ▲ CCTV13 “Chaowen World” ▲ What are the common detection methods of precast buildings in the China Construction News, the director of the Ministry of Housing and Urban-Rural Development? The precast building is to transport the precast building components produced in the factory to the construction site for assembly and installation to reduce environmental pollution.
At this stage, the detection methods used in China are as follows: – X-ray digital imaging method – forming an intuitive image through X-ray This method needs to do a good job of radiation safety protection – embedded steel wire drawing method – is to embed high-strength steel at the grout outlet of the sleeve before grouting Wire can judge the fullness of grouting by drawing load value.
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It is planned to comprehensively promote in the industry in 2021 ▲ The technicians of the scientific research institute will conduct the sleeve grouting plumpness test in the second bid section of the Sunhe Shed Reconstruction Project of China Construction First Bureau.
The cost is high and the quantity is difficult? The scientific research institute of China Construction First Engineering Bureau independently developed the sleeve grouting plumpness tester to solve the quality inspection problem of precast buildings, and solved the quality inspection problem of the sleeve connection part of precast building components based on the “gas volume method” The nondestructive testing technology has won two national utility model patents ▲ The sleeve grouting plumpness tester can accurately calculate the sleeve grouting plumpness by measuring the pressure change value in the sleeve in real time.
The method is simple and fast to evaluate whether the component connection quality is up to standard.
The accuracy and efficiency of testing are greatly improved, The sleeve grouting plumpness tester has been successfully applied in the civil servant apartment project of Beijing Deputy Administrative Center, Zhengzhou University Youth Talent Apartment and other projects.
It can avoid inconvenience in carrying, inconvenience in random testing, cumbersome operation and high testing costs.
The precast buildings that build houses like building blocks have become a new trend in recent years, but the precise detection of the quality of precast buildings has become a major problem in the industry.
The grouting sleeve is the main connection method between the precast components.
This method can’t quantify the fullness – embedded sensor method – infer the shape of the medium around the sensor by measuring the signal feedback of the sensor.
There is a limited blind area.
The cost is high and can’t quantify the fullness – endoscope method – use endoscope to observe the fullness of sleeve grouting in a narrow space.
