Grouting material inspection Grouting material test block blocking after completion of grouting operation 6 Process quality control and inspection of wall installation quality inspection of cast-in-place node inspection of wall positioning line inspection 7 Supervision acceptance of wall installation quality acceptance of concealed works quality acceptance [Attachment] Provisions on quality acceptance of precast concrete buildings – General provisions 1 The construction of precast concrete buildings shall be in accordance with the current national standard Unified Standard for Construction Quality Acceptance of Building Engineering The division and quality acceptance of unit works, divisional works, sub-divisional works and inspection lots shall be carried out according to the relevant provisions of GB50300.

3 The precast concrete structure works shall be accepted according to the concrete structure sub-divisional works, and the precast concrete structure part shall be accepted according to the sub-divisional works of the concrete structure sub-divisional works.

For precast components produced by specialized enterprises in the main control item 1 of precast components, quality certificates shall be checked when entering the site.

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The quality control requirements for the grouting of the steel sleeve for the trial installation of the lifting frame 5.

The raw materials, parts, components and fittings used for the construction of precast concrete structures shall be inspected and accepted according to the inspection batch.

Before the construction of precast concrete buildings, representative units should be selected for the trial installation of precast components, and the construction process should be adjusted in time and the construction scheme should be improved according to the trial installation results.

The construction unit and the supervision unit shall formulate strict quality supervision and management measures, regularly organize regular supervision meetings, coordinate work arrangements, review the project progress, and report the quality and safety hazards of the project, and urge the construction unit to rectify.

Precast buildings have become a national policy, but for precast buildings, most projects lack theory and experience, and there are still many problems in on-site construction quality management and acceptance.

The construction process should strictly control the on-site production process of the grouting material, assign special personnel to supervise the grouting operation process, ensure the quality of the grouting operation, and make the grouting operation records.

Lifting Eye Anchor

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The transportation of precast components shall be carried out by solid transport vehicles and special storage racks.

Before the sleeve grouting operation, the component installation quality shall be reported to the supervisor for acceptance, and the grouting operation can only be carried out after the acceptance, and the whole process of the grouting operation shall be supervised and the grouting operation record shall be made.

5 Concealed work acceptance shall be carried out before concrete pouring of precast concrete structure connection nodes and composite components.

Inspection quantity: all inspection.

Hoisting requirements The precast concrete building construction should adopt a tool-based and standardized tooling system.

6 During the acceptance of sub-divisional works of concrete structures, in addition to providing documents and records in accordance with the relevant provisions of the current national standard Code for Acceptance of Construction Quality of Concrete Structures (GB50204), the following documents and records shall also be provided: (1) engineering design documents, precast component installation construction drawings and processing and fabrication details; (2) Quality certification documents, site acceptance records and sampling re-inspection reports of precast components, main materials and accessories; (3) Installation and construction records of precast components; (4) Type inspection report, process inspection report and construction inspection record of reinforcement sleeve grouting, and construction inspection record of grout anchor lap connection; (5) Inspection and acceptance documents for concealed works of post-cast concrete parts; (6) Strength test report of post-cast concrete, grouting material and base grouting material; (7) Quality inspection record of exterior wall waterproof construction; (8) Quality acceptance documents of cast structure subdivisional works; (9) Treatment plan and acceptance record of major quality problems of precast engineering; (10) Other documents and records of cast engineering.

The quality management requires that the “three inspections” system be strictly implemented during construction: after each process is completed, it must pass the self-inspection, mutual inspection and handover inspection of the team, and then the professional quality inspector will review it and improve the corresponding data, and submit it to the supervision engineer for inspection and acceptance before the next process construction.

The decoration, mechanical and electrical installation and other divisional works of precast concrete buildings shall be subject to quality acceptance according to the current relevant national standards.

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Allocate corresponding quality management personnel and earnestly implement various quality management systems, regulations and relevant specifications.

Inspection method: check the quality certificate or quality acceptance record.
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Based on the engineering practice of China Construction Seventh Bureau, this paper summarizes the construction quality management and acceptance practices of precast concrete buildings for your reference.

Before the pouring of commercial concrete, the vehicle data of commercial concrete shall be checked, submitted to the supervisor for acceptance and the concrete pouring order shall be signed before pouring.

All mobilized components shall be submitted with relevant production data, and the appearance, size, reservation and embedment shall be comprehensively inspected.

Other sub-divisional works of the concrete structure sub-divisional works shall comply with the relevant provisions of the current national standard Code for Acceptance of Construction Quality of Concrete Structures GB50204.

The acceptance of concealed works shall include the following main contents: (1) quality of concrete rough surface, size, quantity and position of keyway; (2) The grade, specification, quantity, position and spacing of the reinforcement, the bending angle of the stirrup hook and the length of the straight section; (3) Connection mode, joint position, number of joints, percentage of joint area, overlapping length, anchorage mode and anchorage length of reinforcement; (4) Specification, quantity and location of embedded parts and reserved pipelines; (5) Waterproof and fireproof construction practices at the joints of precast concrete members; (6) Thermal insulation and node construction; (7) Other concealed items.

1 Quality management system The construction unit shall establish a sound and reliable technical quality assurance system.

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All components shall be subject to quality acceptance before mobilization and can be used only after passing the acceptance.