Supervision of Concrete Prefabricated Houses

Quality control for the supervision of concrete prefabricated houses should be carried out from multiple aspects, including the production of prefabricated components, on-site construction, supervision models, and policy compliance.

Quality Control in the Production of Prefabricated Components

• Raw Material Inspection: After arriving at the factory, raw materials must undergo strict sampling and testing. Only materials that pass the inspection can be used in production, ensuring component quality from the source.
• Production Process Supervision:
  • Review the enterprise standards, production and processing plans, and schedule plans of the component factory to ensure that the plans include quality control measures, acceptance criteria, and qualification standards, providing clear guidance for production.
  • Conduct detailed inspections of mold cleaning and assembly, steel bar and embedded part processing and installation, concrete pouring and surface treatment, curing, demolding, and other processes. Among them, the concrete pouring process requires on-site supervision to ensure compliance with regulatory requirements.
  • After demolding, inspect the appearance and dimensional deviations of the components and conduct structural performance tests on simply-supported prefabricated components to ensure that the component quality meets standards.
• Factory Inspection: Supervisors need to conduct comprehensive inspections of finished products and documentation. Only products that pass the inspection can leave the factory, preventing unqualified products from entering the construction site.

Key Points of On-Site Construction Supervision

• Supervision of Construction Entity Behavior: Inspect the market behavior and physical quality of the construction, construction, and supervision parties, with a focus on sampling and testing the strength of structural concrete to ensure that the construction process complies with design requirements and relevant standards.
• Problem Rectification Tracking: For issues such as unpublicized concrete quality information, incomplete usage records, and missing inspection records, urge enterprises to make rectifications within a specified time to ensure the completeness and accuracy of construction information.
• Inspection of Supervisory Agency Performance: Verify the implementation of supervisory agency responsibilities from aspects such as construction preparation, construction phase, and contract management, and promptly issue rectification opinions for violations to ensure effective supervision work.

Reference for Supervision Models

• Intelligent Supervision: Learn from Qingdao's experience of using a quality tracking and dynamic supervision system to achieve closed-loop rectification of early warning data, improving supervision efficiency and accuracy.
• Differentiated Supervision: Refer to Qingdao's implementation of a "red-yellow-blue" risk classification for ready-mixed concrete enterprises, strengthening control over high-risk enterprises and reasonably allocating supervision resources.

Policy Basis

It is necessary to comply with regulations such as the "Regulations on the Quality Management of Construction Projects" and the "Regulations on the Administration of Construction Enterprise Qualifications" to build a full life-cycle quality control system from production to construction, ensuring the quality and safety of concrete prefabricated houses.